Optimized ZP coalesce vastly.

src/main/java/dk/camelot64/kickc/Compiler.java

@@ -318,7 +318,8 @@ public class Compiler {
       new Pass4RegisterUpliftRemains(program).performUplift(10_000);
 
       // Final register coalesce and finalization
-      new Pass4ZeroPageCoalesce(program).allocate();
+      new Pass4ZeroPageCoalesceAssignment(program).coalesce();
+      new Pass4ZeroPageCoalesce(program).coalesce();
       new Pass4RegistersFinalize(program).allocate(true);
 
    }

src/main/java/dk/camelot64/kickc/passes/Pass4ZeroPageCoalesce.java

@@ -2,9 +2,7 @@ package dk.camelot64.kickc.passes;
 
 import dk.camelot64.kickc.model.*;
 
-import java.util.Collection;
 import java.util.LinkedHashSet;
-import java.util.List;
 import java.util.Set;
 
 /**
@@ -13,12 +11,11 @@ import java.util.Set;
  */
 public class Pass4ZeroPageCoalesce extends Pass2Base {
 
-
    public Pass4ZeroPageCoalesce(Program program) {
       super(program);
    }
 
-   public void allocate() {
+   public void coalesce() {
       LinkedHashSet<String> unknownFragments = new LinkedHashSet<>();
       LiveRangeEquivalenceClassSet liveRangeEquivalenceClassSet = getProgram().getLiveRangeEquivalenceClassSet();
       boolean change;
@@ -39,92 +36,45 @@ public class Pass4ZeroPageCoalesce extends Pass2Base {
     * Find two equivalence classes that can be coalesced into one - and perform the coalescence.
     *
     * @param liveRangeEquivalenceClassSet The set of live range equivalence classes
-    * @param unknownFragments
+    * @param unknownFragments Receives information about any unknown fragments encountered during ASM generation
     * @return true if any classes were coalesced. False otherwise.
     */
    private boolean coalesce(LiveRangeEquivalenceClassSet liveRangeEquivalenceClassSet, Set<String> unknownFragments) {
-
-      double maxScore = -1.0;
-      LiveRangeEquivalenceClass maxThis = null;
-      LiveRangeEquivalenceClass maxOther = null;
-
       for(LiveRangeEquivalenceClass thisEquivalenceClass : liveRangeEquivalenceClassSet.getEquivalenceClasses()) {
          for(LiveRangeEquivalenceClass otherEquivalenceClass : liveRangeEquivalenceClassSet.getEquivalenceClasses()) {
             if(!thisEquivalenceClass.equals(otherEquivalenceClass)) {
-               if(canCoalesce(thisEquivalenceClass, otherEquivalenceClass, unknownFragments)) {
+               if(canCoalesce(thisEquivalenceClass, otherEquivalenceClass, unknownFragments, getProgram())) {
-                  double coalesceScore = getCoalesceScore(thisEquivalenceClass, otherEquivalenceClass);
+                  getLog().append("Coalescing zero page register [ " + thisEquivalenceClass + " ] with [ " + otherEquivalenceClass + " ]");
-                  if(coalesceScore>maxScore) {
+                  liveRangeEquivalenceClassSet.consolidate(thisEquivalenceClass, otherEquivalenceClass);
-                     if(otherEquivalenceClass==null) {
+                  // Reset the program register allocation
-                        throw new RuntimeException("EQC is null!"+otherEquivalenceClass);
+                  getProgram().getLiveRangeEquivalenceClassSet().storeRegisterAllocation();
-                     }
+                  return true;
-                     maxScore = coalesceScore;
-                     maxThis = thisEquivalenceClass;
-                     maxOther = otherEquivalenceClass;
-                  }
                }
             }
          }
       }
-
-      if(maxOther!=null) {
-         getLog().append("Coalescing zero page register [ " + maxThis+ " ] with [ " + maxOther + " ]");
-         liveRangeEquivalenceClassSet.consolidate(maxThis, maxOther);
-         // Reset the program register allocation
-         getProgram().getLiveRangeEquivalenceClassSet().storeRegisterAllocation();
-         return true;
-      }
-
       return false;
    }
 
-   private double getCoalesceScore(LiveRangeEquivalenceClass thisEquivalenceClass, LiveRangeEquivalenceClass otherEquivalenceClass) {
+   /**
-      double score = 0.0;
+    * Determines if two live range equivalence classes can be coalesced.
-      List<VariableRef> thisClassVars = thisEquivalenceClass.getVariables();
+    * This is possible if they are both allocated to zero page, have the same size and the resulting ASM has no live range overlaps or clobber issues.
-      List<VariableRef> otherClassVars = otherEquivalenceClass.getVariables();
+    *
-      VariableReferenceInfos variableReferenceInfos = getProgram().getVariableReferenceInfos();
+    * @param ec1 One equivalence class
-      for(ControlFlowBlock block : getProgram().getGraph().getAllBlocks()) {
+    * @param ec2 Another equivalence class
-         for(Statement statement : block.getStatements()) {
+    * @param unknownFragments Receives information about any unknown fragments encountered during ASM generation
-            Collection<VariableRef> definedVars = variableReferenceInfos.getDefinedVars(statement);
+    * @param program The program
-            Collection<VariableRef> usedVars = variableReferenceInfos.getUsedVars(statement);
+    * @return True if the two equivalence classes can be coalesced into one without problems.
-            if(definedVars!=null && definedVars.size()>0) {
+    */
-               for(VariableRef definedVar : definedVars) {
+   public static boolean canCoalesce(LiveRangeEquivalenceClass ec1, LiveRangeEquivalenceClass ec2, Set<String> unknownFragments, Program program) {
-                  if(thisClassVars.contains(definedVar)) {
+      Registers.Register register1 = ec1.getRegister();
-                     for(VariableRef usedVar : usedVars) {
+      Registers.Register register2 = ec2.getRegister();
-                        if(otherClassVars.contains(usedVar)) {
+      if(register1.isZp() && register2.isZp() && register1.getType().equals(register2.getType())) {
-                           score += 1.0;
+         // Both registers are on Zero Page & have the same zero page size
-                        }
+         // Try out the coalesce to test if it works
-                     }
+         RegisterCombination combination = new RegisterCombination();
-                  } else if(otherClassVars.contains(definedVar)) {
+         combination.setRegister(ec2, register1);
-                     for(VariableRef usedVar : usedVars) {
+         return Pass4RegisterUpliftCombinations.generateCombinationAsm(combination, program, unknownFragments, ScopeRef.ROOT);
-                        if(thisClassVars.contains(usedVar)) {
-                           score += 1.0;
-                        }
-                     }
-                  }
-               }
-            }
-         }
-      }
-      return score;
-   }
-
-   private boolean canCoalesce(LiveRangeEquivalenceClass myEquivalenceClass, LiveRangeEquivalenceClass otherEquivalenceClass, Set<String> unknownFragments) {
-      VariableRef myVariableRef = myEquivalenceClass.getVariables().get(0);
-      Variable myVariable = getProgram().getSymbolInfos().getVariable(myVariableRef);
-      VariableRef otherVariableRef = otherEquivalenceClass.getVariables().get(0);
-      Variable otherVariable = getProgram().getSymbolInfos().getVariable(otherVariableRef);
-      // Types match
-      Registers.Register myRegister = myEquivalenceClass.getRegister();
-      Registers.Register otherRegister = otherEquivalenceClass.getRegister();
-      if(myRegister.isZp() && otherRegister.isZp()) {
-         // Both registers are on Zero Page
-         if(myRegister.getType().equals(otherRegister.getType())) {
-            // Both registers have the same Zero Page size
-            // Try out the coalesce to test if it works
-            RegisterCombination combination = new RegisterCombination();
-            combination.setRegister(otherEquivalenceClass, myRegister);
-            return Pass4RegisterUpliftCombinations.generateCombinationAsm(combination, getProgram(), unknownFragments, ScopeRef.ROOT);
-         }
       }
       return false;
    }

src/main/java/dk/camelot64/kickc/passes/Pass4ZeroPageCoalesceAssignment.java

@@ -0,0 +1,223 @@
+package dk.camelot64.kickc.passes;
+
+import dk.camelot64.kickc.model.*;
+
+import java.util.*;
+
+/**
+ * Coalesces zero page registers where their live ranges do not overlap.
+ * This step tries to coalesce lvalues with rvalues for all assignments - saving code cycles & bytes code if successful.
+ */
+public class Pass4ZeroPageCoalesceAssignment extends Pass2Base {
+
+   public Pass4ZeroPageCoalesceAssignment(Program program) {
+      super(program);
+   }
+
+   public void coalesce() {
+      CoalesceVarScores coalesceVarScores = new CoalesceVarScores(getProgram());
+      LinkedHashSet<String> unknownFragments = new LinkedHashSet<>();
+
+      boolean change;
+      do {
+         change = false;
+         CoalesceLiveRangeEquivalenceClassScores equivalenceClassScores =
+               new CoalesceLiveRangeEquivalenceClassScores(getProgram(), coalesceVarScores);
+         List<LiveRangeEquivalenceClassCoalesceCandidate> coalesceCandidates =
+               equivalenceClassScores.getCoalesceCandidates();
+         for(LiveRangeEquivalenceClassCoalesceCandidate candidate : coalesceCandidates) {
+            change |= attemptCoalesce(candidate, unknownFragments);
+         }
+      } while(change);
+
+      if(unknownFragments.size() > 0) {
+         getLog().append("MISSING FRAGMENTS");
+         for(String unknownFragment : unknownFragments) {
+            getLog().append("  " + unknownFragment);
+         }
+      }
+   }
+
+   private boolean attemptCoalesce(LiveRangeEquivalenceClassCoalesceCandidate candidate, LinkedHashSet<String> unknownFragments) {
+      LiveRangeEquivalenceClassSet liveRangeEquivalenceClassSet = getProgram().getLiveRangeEquivalenceClassSet();
+      List<LiveRangeEquivalenceClass> equivalenceClasses = liveRangeEquivalenceClassSet.getEquivalenceClasses();
+      if(equivalenceClasses.contains(candidate.getEc1()) && equivalenceClasses.contains(candidate.getEc2())) {
+         // Both equivalence classes still exist
+         if(Pass4ZeroPageCoalesce.canCoalesce(candidate.getEc1(), candidate.getEc2(), unknownFragments, getProgram())) {
+            getLog().append("Coalescing zero page register with common assignment [ " + candidate.getEc1() + " ] with [ " + candidate.getEc2()+ " ] - score: "+candidate.getScore());
+            liveRangeEquivalenceClassSet.consolidate(candidate.getEc1(), candidate.getEc2());
+            // Reset the program register allocation
+            getProgram().getLiveRangeEquivalenceClassSet().storeRegisterAllocation();
+            return true;
+         }
+      }
+      return false;
+   }
+
+   /**
+    * Scores for coalescing any pair of variables.
+    * Scores are increased when one variable is an lvalue and the other an rvalue in an assignment.
+    */
+   private static class CoalesceVarScores {
+
+      /** Maps var to scores for coalescing with other variables */
+      private Map<VariableRef, Map<VariableRef, Integer>> scores;
+
+      public CoalesceVarScores(Program program) {
+         this.scores = new LinkedHashMap<>();
+         VariableReferenceInfos variableReferenceInfos = program.getVariableReferenceInfos();
+         for(ControlFlowBlock block : program.getGraph().getAllBlocks()) {
+            for(Statement statement : block.getStatements()) {
+               Collection<VariableRef> definedVars = variableReferenceInfos.getDefinedVars(statement);
+               Collection<VariableRef> usedVars = variableReferenceInfos.getUsedVars(statement);
+               if(definedVars != null && definedVars.size() > 0) {
+                  for(VariableRef definedVar : definedVars) {
+                     for(VariableRef usedVar : usedVars) {
+                        incScore(definedVar, usedVar);
+                     }
+                  }
+               }
+            }
+         }
+      }
+
+      private void incScore(VariableRef definedVar, VariableRef usedVar) {
+         setScore(definedVar, usedVar, getScore(definedVar, usedVar) + 1);
+         setScore(usedVar, definedVar, getScore(usedVar, definedVar) + 1);
+      }
+
+      private void setScore(VariableRef var1, VariableRef var2, Integer score) {
+         scores.computeIfAbsent(var1, k -> new LinkedHashMap<>()).put(var2, score);
+      }
+
+      public Integer getScore(VariableRef var1, VariableRef var2) {
+         Map<VariableRef, Integer> varScores = scores.get(var1);
+         if(varScores == null) {
+            return 0;
+         }
+         Integer score = varScores.get(var2);
+         if(score == null) {
+            return 0;
+         }
+         return score;
+      }
+
+   }
+
+   /**
+    * Scores for coalescing any pair of live range equivalence classes.
+    * Scores are higher when a variable in one class is an lvalue and a variable in the other an rvalue in an assignment.
+    */
+   private static class CoalesceLiveRangeEquivalenceClassScores {
+
+      /** Maps var to scores for coalescing with other LiveRangeEquivalenceClass */
+      private Map<LiveRangeEquivalenceClass, Map<LiveRangeEquivalenceClass, Integer>> scores;
+
+      public CoalesceLiveRangeEquivalenceClassScores(Program program, CoalesceVarScores varScores) {
+         this.scores = new LinkedHashMap<>();
+         LiveRangeEquivalenceClassSet liveRangeEquivalenceClassSet = program.getLiveRangeEquivalenceClassSet();
+         for(LiveRangeEquivalenceClass thisEquivalenceClass : liveRangeEquivalenceClassSet.getEquivalenceClasses()) {
+            for(LiveRangeEquivalenceClass otherEquivalenceClass : liveRangeEquivalenceClassSet.getEquivalenceClasses()) {
+               if(!thisEquivalenceClass.equals(otherEquivalenceClass)) {
+                  incScore(thisEquivalenceClass, otherEquivalenceClass, varScores);
+               }
+            }
+         }
+      }
+
+      private void incScore(LiveRangeEquivalenceClass ec1, LiveRangeEquivalenceClass ec2, CoalesceVarScores varScores) {
+         for(VariableRef var1 : ec1.getVariables()) {
+            for(VariableRef var2 : ec2.getVariables()) {
+               Integer varScore = varScores.getScore(var1, var2);
+               if(varScore > 0) {
+                  setScore(ec1, ec2, getScore(ec1, ec2) + varScore);
+               }
+            }
+         }
+      }
+
+      private void setScore(LiveRangeEquivalenceClass ec1, LiveRangeEquivalenceClass ec2, Integer score) {
+         scores.computeIfAbsent(ec1, k -> new LinkedHashMap<>()).put(ec2, score);
+      }
+
+      public Integer getScore(LiveRangeEquivalenceClass ec1, LiveRangeEquivalenceClass ec2) {
+         Map<LiveRangeEquivalenceClass, Integer> varScores = scores.get(ec1);
+         if(varScores == null) {
+            return 0;
+         }
+         Integer score = varScores.get(ec2);
+         if(score == null) {
+            return 0;
+         }
+         return score;
+      }
+
+      /**
+       * Get all candidate pairs of live range equivalence classes for coalescing with a positive score.
+       * The returned list is sorted so the candidates with the highest score are first.
+       *
+       * @return candidate pairs of live range equivalence classes for coalescing with a positive score
+       */
+      public List<LiveRangeEquivalenceClassCoalesceCandidate> getCoalesceCandidates() {
+         ArrayList<LiveRangeEquivalenceClassCoalesceCandidate> candidates = new ArrayList<>();
+         for(LiveRangeEquivalenceClass ec1 : scores.keySet()) {
+            Map<LiveRangeEquivalenceClass, Integer> ec1Scores = scores.get(ec1);
+            for(LiveRangeEquivalenceClass ec2 : ec1Scores.keySet()) {
+               Integer score = ec1Scores.get(ec2);
+               LiveRangeEquivalenceClassCoalesceCandidate candidate =
+                     new LiveRangeEquivalenceClassCoalesceCandidate(ec1, ec2, score);
+               if(!candidates.contains(candidate)) {
+                  candidates.add(candidate);
+               }
+            }
+         }
+         candidates.sort((o1, o2) -> (o2.getScore() - o1.getScore()));
+         return candidates;
+      }
+
+   }
+
+   /**
+    * A pair of live range equivalence classes that are candidates for coalescing.
+    * The pair is unordered - meaning it is equal to the pair with the same classes in opposite order.
+    */
+   private static class LiveRangeEquivalenceClassCoalesceCandidate {
+      private LiveRangeEquivalenceClass ec1;
+      private LiveRangeEquivalenceClass ec2;
+      private Integer score;
+
+      public LiveRangeEquivalenceClassCoalesceCandidate(LiveRangeEquivalenceClass ec1, LiveRangeEquivalenceClass ec2, Integer score) {
+         this.ec1 = ec1;
+         this.ec2 = ec2;
+         this.score = score;
+      }
+
+      @Override
+      public boolean equals(Object o) {
+         if(this == o) return true;
+         if(o == null || getClass() != o.getClass()) return false;
+         LiveRangeEquivalenceClassCoalesceCandidate that = (LiveRangeEquivalenceClassCoalesceCandidate) o;
+         if(ec1.equals(that.ec1) && ec2.equals(that.ec2)) return true;
+         if(ec1.equals(that.ec2) && ec2.equals(that.ec1)) return true;
+         return false;
+      }
+
+      @Override
+      public int hashCode() {
+         return ec1.hashCode() + ec2.hashCode();
+      }
+
+      public Integer getScore() {
+         return score;
+      }
+
+      public LiveRangeEquivalenceClass getEc1() {
+         return ec1;
+      }
+
+      public LiveRangeEquivalenceClass getEc2() {
+         return ec2;
+      }
+   }
+
+}

src/test/java/dk/camelot64/kickc/test/ref/bitmap-bresenham.asm

@@ -49,7 +49,7 @@ lines: {
 }
 line: {
     .label x0 = 7
-    .label x1 = $a
+    .label x1 = 8
     .label y0 = 5
     .label xd = 3
     .label yd = 4
@@ -92,8 +92,6 @@ line: {
     cmp xd
     bcs b6
     ldx x0
-    lda x1
-    sta line_xdyd.x1
     jsr line_xdyd
     jmp breturn
   b6:
@@ -118,6 +116,8 @@ line: {
     bcs b10
     ldx x1
     sty line_xdyd.y
+    lda x0
+    sta line_xdyd.x1
     jsr line_xdyd
     jmp breturn
   b10:
@@ -178,8 +178,8 @@ line_ydxi: {
     rts
 }
 plot: {
-    .label _0 = 8
+    .label _0 = 9
-    .label plotter_x = 8
+    .label plotter_x = 9
     .label plotter_y = $b
     lda plot_xhi,x
     sta plotter_x+1
@@ -203,7 +203,7 @@ plot: {
     rts
 }
 line_xdyi: {
-    .label _6 = $a
+    .label _6 = 8
     .label y = 5
     .label x1 = 7
     .label xd = 3
@@ -269,9 +269,9 @@ line_ydxd: {
     rts
 }
 line_xdyd: {
-    .label _6 = $a
+    .label _6 = 7
     .label y = 5
-    .label x1 = 7
+    .label x1 = 8
     .label xd = 3
     .label yd = 4
     .label e = 6
@@ -304,7 +304,7 @@ line_xdyd: {
 }
 init_plot_tables: {
     .label _6 = 2
-    .label yoffs = 8
+    .label yoffs = 9
     ldy #$80
     ldx #0
   b1:
@@ -356,8 +356,8 @@ init_plot_tables: {
     rts
 }
 init_screen: {
-    .label b = 8
+    .label b = 9
-    .label c = 8
+    .label c = 9
     lda #<BITMAP
     sta b
     lda #>BITMAP

src/test/java/dk/camelot64/kickc/test/ref/bitmap-bresenham.log

@@ -5561,40 +5561,40 @@ Attempting to uplift remaining variables inzp ZP_BYTE:42 [ line::xd#1 ]
 Uplifting [line] best 268790 combination zp ZP_BYTE:42 [ line::xd#1 ] 
 Attempting to uplift remaining variables inzp ZP_BYTE:45 [ line::xd#0 ]
 Uplifting [line] best 268790 combination zp ZP_BYTE:45 [ line::xd#0 ] 
-Coalescing zero page register [ zp ZP_BYTE:3 [ line_ydxi::xd#2 line_ydxi::xd#1 line_ydxi::xd#0 ] ] with [ zp ZP_BYTE:42 [ line::xd#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:3 [ line_ydxi::xd#2 line_ydxi::xd#1 line_ydxi::xd#0 ] ] with [ zp ZP_BYTE:42 [ line::xd#1 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:3 [ line_ydxi::xd#2 line_ydxi::xd#1 line_ydxi::xd#0 line::xd#1 ] ] with [ zp ZP_BYTE:12 [ line_xdyi::xd#5 line_xdyi::xd#0 line_xdyi::xd#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:3 [ line_ydxi::xd#2 line_ydxi::xd#1 line_ydxi::xd#0 line::xd#1 ] ] with [ zp ZP_BYTE:45 [ line::xd#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:3 [ line_ydxi::xd#2 line_ydxi::xd#1 line_ydxi::xd#0 line::xd#1 line_xdyi::xd#5 line_xdyi::xd#0 line_xdyi::xd#1 ] ] with [ zp ZP_BYTE:45 [ line::xd#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:4 [ line_ydxi::yd#5 line_ydxi::yd#1 line_ydxi::yd#0 ] ] with [ zp ZP_BYTE:43 [ line::yd#1 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:3 [ line_ydxi::xd#2 line_ydxi::xd#1 line_ydxi::xd#0 line::xd#1 line_xdyi::xd#5 line_xdyi::xd#0 line_xdyi::xd#1 line::xd#0 ] ] with [ zp ZP_BYTE:17 [ line_ydxd::xd#2 line_ydxd::xd#1 line_ydxd::xd#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:4 [ line_ydxi::yd#5 line_ydxi::yd#1 line_ydxi::yd#0 line::yd#1 ] ] with [ zp ZP_BYTE:47 [ line::yd#10 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:3 [ line_ydxi::xd#2 line_ydxi::xd#1 line_ydxi::xd#0 line::xd#1 line_xdyi::xd#5 line_xdyi::xd#0 line_xdyi::xd#1 line::xd#0 line_ydxd::xd#2 line_ydxd::xd#1 line_ydxd::xd#0 ] ] with [ zp ZP_BYTE:24 [ line_xdyd::xd#5 line_xdyd::xd#0 line_xdyd::xd#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:5 [ line_ydxi::y1#6 line_ydxi::y1#1 line_ydxi::y1#0 ] ] with [ zp ZP_BYTE:40 [ line::y0#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:4 [ line_ydxi::yd#5 line_ydxi::yd#1 line_ydxi::yd#0 ] ] with [ zp ZP_BYTE:43 [ line::yd#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:13 [ line_xdyi::x1#6 line_xdyi::x1#0 line_xdyi::x1#1 ] ] with [ zp ZP_BYTE:38 [ line::x0#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:4 [ line_ydxi::yd#5 line_ydxi::yd#1 line_ydxi::yd#0 line::yd#1 ] ] with [ zp ZP_BYTE:11 [ line_xdyi::yd#2 line_xdyi::yd#0 line_xdyi::yd#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:18 [ line_ydxd::yd#5 line_ydxd::yd#1 line_ydxd::yd#0 ] ] with [ zp ZP_BYTE:44 [ line::yd#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:4 [ line_ydxi::yd#5 line_ydxi::yd#1 line_ydxi::yd#0 line::yd#1 line_xdyi::yd#2 line_xdyi::yd#0 line_xdyi::yd#1 ] ] with [ zp ZP_BYTE:47 [ line::yd#10 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:18 [ line_ydxd::yd#5 line_ydxd::yd#1 line_ydxd::yd#0 line::yd#0 ] ] with [ zp ZP_BYTE:46 [ line::yd#3 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:5 [ line_ydxi::y1#6 line_ydxi::y1#1 line_ydxi::y1#0 ] ] with [ zp ZP_BYTE:40 [ line::y0#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:25 [ line_xdyd::x1#6 line_xdyd::x1#0 line_xdyd::x1#1 ] ] with [ zp ZP_BYTE:39 [ line::x1#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:5 [ line_ydxi::y1#6 line_ydxi::y1#1 line_ydxi::y1#0 line::y0#0 ] ] with [ zp ZP_BYTE:15 [ line_xdyi::y#3 line_xdyi::y#5 line_xdyi::y#0 line_xdyi::y#1 line_xdyi::y#6 line_xdyi::y#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:49 [ plot::plotter_x#0 ] ] with [ zp ZP_WORD:53 [ plot::$0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:5 [ line_ydxi::y1#6 line_ydxi::y1#1 line_ydxi::y1#0 line::y0#0 line_xdyi::y#3 line_xdyi::y#5 line_xdyi::y#0 line_xdyi::y#1 line_xdyi::y#6 line_xdyi::y#2 ] ] with [ zp ZP_BYTE:19 [ line_ydxd::y1#6 line_ydxd::y1#1 line_ydxd::y1#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:3 [ line_ydxi::xd#2 line_ydxi::xd#1 line_ydxi::xd#0 line::xd#1 line::xd#0 ] ] with [ zp ZP_BYTE:12 [ line_xdyi::xd#5 line_xdyi::xd#0 line_xdyi::xd#1 ] ] - score: 2
-Coalescing zero page register [ zp ZP_BYTE:5 [ line_ydxi::y1#6 line_ydxi::y1#1 line_ydxi::y1#0 line::y0#0 line_xdyi::y#3 line_xdyi::y#5 line_xdyi::y#0 line_xdyi::y#1 line_xdyi::y#6 line_xdyi::y#2 line_ydxd::y1#6 line_ydxd::y1#1 line_ydxd::y1#0 ] ] with [ zp ZP_BYTE:27 [ line_xdyd::y#3 line_xdyd::y#5 line_xdyd::y#0 line_xdyd::y#1 line_xdyd::y#6 line_xdyd::y#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:3 [ line_ydxi::xd#2 line_ydxi::xd#1 line_ydxi::xd#0 line::xd#1 line::xd#0 line_xdyi::xd#5 line_xdyi::xd#0 line_xdyi::xd#1 ] ] with [ zp ZP_BYTE:17 [ line_ydxd::xd#2 line_ydxd::xd#1 line_ydxd::xd#0 ] ] - score: 2
-Coalescing zero page register [ zp ZP_BYTE:13 [ line_xdyi::x1#6 line_xdyi::x1#0 line_xdyi::x1#1 ] ] with [ zp ZP_BYTE:38 [ line::x0#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:3 [ line_ydxi::xd#2 line_ydxi::xd#1 line_ydxi::xd#0 line::xd#1 line::xd#0 line_xdyi::xd#5 line_xdyi::xd#0 line_xdyi::xd#1 line_ydxd::xd#2 line_ydxd::xd#1 line_ydxd::xd#0 ] ] with [ zp ZP_BYTE:24 [ line_xdyd::xd#5 line_xdyd::xd#0 line_xdyd::xd#1 ] ] - score: 2
-Coalescing zero page register [ zp ZP_BYTE:13 [ line_xdyi::x1#6 line_xdyi::x1#0 line_xdyi::x1#1 line::x0#0 ] ] with [ zp ZP_BYTE:25 [ line_xdyd::x1#6 line_xdyd::x1#0 line_xdyd::x1#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:4 [ line_ydxi::yd#5 line_ydxi::yd#1 line_ydxi::yd#0 line::yd#1 line::yd#10 ] ] with [ zp ZP_BYTE:11 [ line_xdyi::yd#2 line_xdyi::yd#0 line_xdyi::yd#1 ] ] - score: 2
-Coalescing zero page register [ zp ZP_BYTE:18 [ line_ydxd::yd#5 line_ydxd::yd#1 line_ydxd::yd#0 ] ] with [ zp ZP_BYTE:44 [ line::yd#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:18 [ line_ydxd::yd#5 line_ydxd::yd#1 line_ydxd::yd#0 line::yd#0 line::yd#3 ] ] with [ zp ZP_BYTE:23 [ line_xdyd::yd#2 line_xdyd::yd#0 line_xdyd::yd#1 ] ] - score: 2
-Coalescing zero page register [ zp ZP_BYTE:18 [ line_ydxd::yd#5 line_ydxd::yd#1 line_ydxd::yd#0 line::yd#0 ] ] with [ zp ZP_BYTE:23 [ line_xdyd::yd#2 line_xdyd::yd#0 line_xdyd::yd#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:5 [ line_ydxi::y1#6 line_ydxi::y1#1 line_ydxi::y1#0 line::y0#0 ] ] with [ zp ZP_BYTE:15 [ line_xdyi::y#3 line_xdyi::y#5 line_xdyi::y#0 line_xdyi::y#1 line_xdyi::y#6 line_xdyi::y#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:18 [ line_ydxd::yd#5 line_ydxd::yd#1 line_ydxd::yd#0 line::yd#0 line_xdyd::yd#2 line_xdyd::yd#0 line_xdyd::yd#1 ] ] with [ zp ZP_BYTE:46 [ line::yd#3 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:5 [ line_ydxi::y1#6 line_ydxi::y1#1 line_ydxi::y1#0 line::y0#0 line_xdyi::y#3 line_xdyi::y#5 line_xdyi::y#0 line_xdyi::y#1 line_xdyi::y#6 line_xdyi::y#2 ] ] with [ zp ZP_BYTE:19 [ line_ydxd::y1#6 line_ydxd::y1#1 line_ydxd::y1#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:49 [ plot::plotter_x#0 ] ] with [ zp ZP_WORD:53 [ plot::$0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:5 [ line_ydxi::y1#6 line_ydxi::y1#1 line_ydxi::y1#0 line::y0#0 line_xdyi::y#3 line_xdyi::y#5 line_xdyi::y#0 line_xdyi::y#1 line_xdyi::y#6 line_xdyi::y#2 line_ydxd::y1#6 line_ydxd::y1#1 line_ydxd::y1#0 ] ] with [ zp ZP_BYTE:27 [ line_xdyd::y#3 line_xdyd::y#5 line_xdyd::y#0 line_xdyd::y#1 line_xdyd::y#6 line_xdyd::y#2 ] ] - score: 1
 Coalescing zero page register [ zp ZP_BYTE:2 [ lines::l#2 lines::l#1 ] ] with [ zp ZP_BYTE:60 [ init_plot_tables::$6 ] ]
-Coalescing zero page register [ zp ZP_BYTE:4 [ line_ydxi::yd#5 line_ydxi::yd#1 line_ydxi::yd#0 line::yd#1 line_xdyi::yd#2 line_xdyi::yd#0 line_xdyi::yd#1 line::yd#10 ] ] with [ zp ZP_BYTE:18 [ line_ydxd::yd#5 line_ydxd::yd#1 line_ydxd::yd#0 line::yd#0 line_xdyd::yd#2 line_xdyd::yd#0 line_xdyd::yd#1 line::yd#3 ] ]
+Coalescing zero page register [ zp ZP_BYTE:4 [ line_ydxi::yd#5 line_ydxi::yd#1 line_ydxi::yd#0 line::yd#1 line::yd#10 line_xdyi::yd#2 line_xdyi::yd#0 line_xdyi::yd#1 ] ] with [ zp ZP_BYTE:18 [ line_ydxd::yd#5 line_ydxd::yd#1 line_ydxd::yd#0 line::yd#0 line::yd#3 line_xdyd::yd#2 line_xdyd::yd#0 line_xdyd::yd#1 ] ]
 Coalescing zero page register [ zp ZP_BYTE:7 [ line_ydxi::y#3 line_ydxi::y#6 line_ydxi::y#1 line_ydxi::y#0 line_ydxi::y#2 ] ] with [ zp ZP_BYTE:16 [ line_xdyi::e#3 line_xdyi::e#0 line_xdyi::e#6 line_xdyi::e#2 line_xdyi::e#1 ] ]
 Coalescing zero page register [ zp ZP_BYTE:7 [ line_ydxi::y#3 line_ydxi::y#6 line_ydxi::y#1 line_ydxi::y#0 line_ydxi::y#2 line_xdyi::e#3 line_xdyi::e#0 line_xdyi::e#6 line_xdyi::e#2 line_xdyi::e#1 ] ] with [ zp ZP_BYTE:21 [ line_ydxd::y#2 line_ydxd::y#7 line_ydxd::y#1 line_ydxd::y#0 line_ydxd::y#3 ] ]
 Coalescing zero page register [ zp ZP_BYTE:7 [ line_ydxi::y#3 line_ydxi::y#6 line_ydxi::y#1 line_ydxi::y#0 line_ydxi::y#2 line_xdyi::e#3 line_xdyi::e#0 line_xdyi::e#6 line_xdyi::e#2 line_xdyi::e#1 line_ydxd::y#2 line_ydxd::y#7 line_ydxd::y#1 line_ydxd::y#0 line_ydxd::y#3 ] ] with [ zp ZP_BYTE:28 [ line_xdyd::e#3 line_xdyd::e#0 line_xdyd::e#6 line_xdyd::e#2 line_xdyd::e#1 ] ]
-Coalescing zero page register [ zp ZP_BYTE:8 [ line_ydxi::e#3 line_ydxi::e#0 line_ydxi::e#6 line_ydxi::e#2 line_ydxi::e#1 ] ] with [ zp ZP_BYTE:13 [ line_xdyi::x1#6 line_xdyi::x1#0 line_xdyi::x1#1 line::x0#0 line_xdyd::x1#6 line_xdyd::x1#0 line_xdyd::x1#1 ] ]
+Coalescing zero page register [ zp ZP_BYTE:8 [ line_ydxi::e#3 line_ydxi::e#0 line_ydxi::e#6 line_ydxi::e#2 line_ydxi::e#1 ] ] with [ zp ZP_BYTE:13 [ line_xdyi::x1#6 line_xdyi::x1#0 line_xdyi::x1#1 line::x0#0 ] ]
-Coalescing zero page register [ zp ZP_BYTE:8 [ line_ydxi::e#3 line_ydxi::e#0 line_ydxi::e#6 line_ydxi::e#2 line_ydxi::e#1 line_xdyi::x1#6 line_xdyi::x1#0 line_xdyi::x1#1 line::x0#0 line_xdyd::x1#6 line_xdyd::x1#0 line_xdyd::x1#1 ] ] with [ zp ZP_BYTE:22 [ line_ydxd::e#3 line_ydxd::e#0 line_ydxd::e#6 line_ydxd::e#2 line_ydxd::e#1 ] ]
+Coalescing zero page register [ zp ZP_BYTE:8 [ line_ydxi::e#3 line_ydxi::e#0 line_ydxi::e#6 line_ydxi::e#2 line_ydxi::e#1 line_xdyi::x1#6 line_xdyi::x1#0 line_xdyi::x1#1 line::x0#0 ] ] with [ zp ZP_BYTE:22 [ line_ydxd::e#3 line_ydxd::e#0 line_ydxd::e#6 line_ydxd::e#2 line_ydxd::e#1 ] ]
+Coalescing zero page register [ zp ZP_BYTE:8 [ line_ydxi::e#3 line_ydxi::e#0 line_ydxi::e#6 line_ydxi::e#2 line_ydxi::e#1 line_xdyi::x1#6 line_xdyi::x1#0 line_xdyi::x1#1 line::x0#0 line_ydxd::e#3 line_ydxd::e#0 line_ydxd::e#6 line_ydxd::e#2 line_ydxd::e#1 ] ] with [ zp ZP_BYTE:58 [ line_xdyd::$6 ] ]
+Coalescing zero page register [ zp ZP_BYTE:25 [ line_xdyd::x1#6 line_xdyd::x1#0 line_xdyd::x1#1 line::x1#0 ] ] with [ zp ZP_BYTE:56 [ line_xdyi::$6 ] ]
 Coalescing zero page register [ zp ZP_WORD:32 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 ] ] with [ zp ZP_WORD:34 [ init_screen::b#2 init_screen::b#1 ] ]
 Coalescing zero page register [ zp ZP_WORD:32 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 ] ] with [ zp ZP_WORD:36 [ init_screen::c#2 init_screen::c#1 ] ]
 Coalescing zero page register [ zp ZP_WORD:32 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 ] ] with [ zp ZP_WORD:49 [ plot::plotter_x#0 plot::$0 ] ]
-Coalescing zero page register [ zp ZP_BYTE:39 [ line::x1#0 ] ] with [ zp ZP_BYTE:56 [ line_xdyi::$6 ] ]
-Coalescing zero page register [ zp ZP_BYTE:39 [ line::x1#0 line_xdyi::$6 ] ] with [ zp ZP_BYTE:58 [ line_xdyd::$6 ] ]
 Allocated (was zp ZP_BYTE:7) zp ZP_BYTE:6 [ line_ydxi::y#3 line_ydxi::y#6 line_ydxi::y#1 line_ydxi::y#0 line_ydxi::y#2 line_xdyi::e#3 line_xdyi::e#0 line_xdyi::e#6 line_xdyi::e#2 line_xdyi::e#1 line_ydxd::y#2 line_ydxd::y#7 line_ydxd::y#1 line_ydxd::y#0 line_ydxd::y#3 line_xdyd::e#3 line_xdyd::e#0 line_xdyd::e#6 line_xdyd::e#2 line_xdyd::e#1 ]
-Allocated (was zp ZP_BYTE:8) zp ZP_BYTE:7 [ line_ydxi::e#3 line_ydxi::e#0 line_ydxi::e#6 line_ydxi::e#2 line_ydxi::e#1 line_xdyi::x1#6 line_xdyi::x1#0 line_xdyi::x1#1 line::x0#0 line_xdyd::x1#6 line_xdyd::x1#0 line_xdyd::x1#1 line_ydxd::e#3 line_ydxd::e#0 line_ydxd::e#6 line_ydxd::e#2 line_ydxd::e#1 ]
+Allocated (was zp ZP_BYTE:8) zp ZP_BYTE:7 [ line_ydxi::e#3 line_ydxi::e#0 line_ydxi::e#6 line_ydxi::e#2 line_ydxi::e#1 line_xdyi::x1#6 line_xdyi::x1#0 line_xdyi::x1#1 line::x0#0 line_ydxd::e#3 line_ydxd::e#0 line_ydxd::e#6 line_ydxd::e#2 line_ydxd::e#1 line_xdyd::$6 ]
-Allocated (was zp ZP_WORD:32) zp ZP_WORD:8 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 plot::plotter_x#0 plot::$0 ]
+Allocated (was zp ZP_BYTE:25) zp ZP_BYTE:8 [ line_xdyd::x1#6 line_xdyd::x1#0 line_xdyd::x1#1 line::x1#0 line_xdyi::$6 ]
-Allocated (was zp ZP_BYTE:39) zp ZP_BYTE:10 [ line::x1#0 line_xdyi::$6 line_xdyd::$6 ]
+Allocated (was zp ZP_WORD:32) zp ZP_WORD:9 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 plot::plotter_x#0 plot::$0 ]
 Allocated (was zp ZP_WORD:51) zp ZP_WORD:11 [ plot::plotter_y#0 ]
 
 ASSEMBLER BEFORE OPTIMIZATION
@@ -5725,7 +5725,7 @@ lines: {
 //SEG43 line
 line: {
     .label x0 = 7
-    .label x1 = $a
+    .label x1 = 8
     .label y0 = 5
     .label xd = 3
     .label yd = 4
@@ -5828,9 +5828,8 @@ line: {
     ldx x0
   //SEG84 [46] (byte) line_xdyd::y#0 ← (byte) line::y0#0 [ line::x1#0 line::xd#1 line::yd#0 line_xdyd::x#0 line_xdyd::y#0 ] ( main:2::lines:12::line:21 [ lines::l#2 line::x1#0 line::xd#1 line::yd#0 line_xdyd::x#0 line_xdyd::y#0 ] )
     // (byte) line_xdyd::y#0 = (byte) line::y0#0  // register copy zp ZP_BYTE:5
-  //SEG85 [47] (byte) line_xdyd::x1#0 ← (byte) line::x1#0 [ line::xd#1 line::yd#0 line_xdyd::x#0 line_xdyd::y#0 line_xdyd::x1#0 ] ( main:2::lines:12::line:21 [ lines::l#2 line::xd#1 line::yd#0 line_xdyd::x#0 line_xdyd::y#0 line_xdyd::x1#0 ] ) -- vbuz1=vbuz2 
+  //SEG85 [47] (byte) line_xdyd::x1#0 ← (byte) line::x1#0 [ line::xd#1 line::yd#0 line_xdyd::x#0 line_xdyd::y#0 line_xdyd::x1#0 ] ( main:2::lines:12::line:21 [ lines::l#2 line::xd#1 line::yd#0 line_xdyd::x#0 line_xdyd::y#0 line_xdyd::x1#0 ] )
-    lda x1
+    // (byte) line_xdyd::x1#0 = (byte) line::x1#0  // register copy zp ZP_BYTE:8
-    sta line_xdyd.x1
   //SEG86 [48] (byte) line_xdyd::xd#0 ← (byte) line::xd#1 [ line::yd#0 line_xdyd::x#0 line_xdyd::y#0 line_xdyd::x1#0 line_xdyd::xd#0 ] ( main:2::lines:12::line:21 [ lines::l#2 line::yd#0 line_xdyd::x#0 line_xdyd::y#0 line_xdyd::x1#0 line_xdyd::xd#0 ] )
     // (byte) line_xdyd::xd#0 = (byte) line::xd#1  // register copy zp ZP_BYTE:3
   //SEG87 [49] (byte) line_xdyd::yd#0 ← (byte) line::yd#0 [ line_xdyd::x#0 line_xdyd::y#0 line_xdyd::x1#0 line_xdyd::xd#0 line_xdyd::yd#0 ] ( main:2::lines:12::line:21 [ lines::l#2 line_xdyd::x#0 line_xdyd::y#0 line_xdyd::x1#0 line_xdyd::xd#0 line_xdyd::yd#0 ] )
@@ -5898,8 +5897,9 @@ line: {
     ldx x1
   //SEG116 [62] (byte) line_xdyd::y#1 ← (byte) line::y1#0 [ line::x0#0 line::xd#0 line::yd#3 line_xdyd::x#1 line_xdyd::y#1 ] ( main:2::lines:12::line:21 [ lines::l#2 line::x0#0 line::xd#0 line::yd#3 line_xdyd::x#1 line_xdyd::y#1 ] ) -- vbuz1=vbuyy 
     sty line_xdyd.y
-  //SEG117 [63] (byte) line_xdyd::x1#1 ← (byte) line::x0#0 [ line::xd#0 line::yd#3 line_xdyd::x#1 line_xdyd::y#1 line_xdyd::x1#1 ] ( main:2::lines:12::line:21 [ lines::l#2 line::xd#0 line::yd#3 line_xdyd::x#1 line_xdyd::y#1 line_xdyd::x1#1 ] )
+  //SEG117 [63] (byte) line_xdyd::x1#1 ← (byte) line::x0#0 [ line::xd#0 line::yd#3 line_xdyd::x#1 line_xdyd::y#1 line_xdyd::x1#1 ] ( main:2::lines:12::line:21 [ lines::l#2 line::xd#0 line::yd#3 line_xdyd::x#1 line_xdyd::y#1 line_xdyd::x1#1 ] ) -- vbuz1=vbuz2 
-    // (byte) line_xdyd::x1#1 = (byte) line::x0#0  // register copy zp ZP_BYTE:7
+    lda x0
+    sta line_xdyd.x1
   //SEG118 [64] (byte) line_xdyd::xd#1 ← (byte) line::xd#0 [ line::yd#3 line_xdyd::x#1 line_xdyd::y#1 line_xdyd::x1#1 line_xdyd::xd#1 ] ( main:2::lines:12::line:21 [ lines::l#2 line::yd#3 line_xdyd::x#1 line_xdyd::y#1 line_xdyd::x1#1 line_xdyd::xd#1 ] )
     // (byte) line_xdyd::xd#1 = (byte) line::xd#0  // register copy zp ZP_BYTE:3
   //SEG119 [65] (byte) line_xdyd::yd#1 ← (byte) line::yd#3 [ line_xdyd::x#1 line_xdyd::y#1 line_xdyd::x1#1 line_xdyd::xd#1 line_xdyd::yd#1 ] ( main:2::lines:12::line:21 [ lines::l#2 line_xdyd::x#1 line_xdyd::y#1 line_xdyd::x1#1 line_xdyd::xd#1 line_xdyd::yd#1 ] )
@@ -6071,8 +6071,8 @@ line_ydxi: {
 }
 //SEG197 plot
 plot: {
-    .label _0 = 8
+    .label _0 = 9
-    .label plotter_x = 8
+    .label plotter_x = 9
     .label plotter_y = $b
   //SEG198 [103] (word) plot::plotter_x#0 ← *((const byte[256]) plot_xhi#0 + (byte) plot::x#4) w= *((const byte[256]) plot_xlo#0 + (byte) plot::x#4) [ plot::x#4 plot::y#4 plot::plotter_x#0 ] ( main:2::lines:12::line:21::line_ydxi:42::plot:92 [ lines::l#2 line_ydxi::xd#2 line_ydxi::yd#5 line_ydxi::y1#6 line_ydxi::x#3 line_ydxi::y#3 line_ydxi::e#3 plot::x#4 plot::y#4 plot::plotter_x#0 ] main:2::lines:12::line:21::line_ydxi:86::plot:92 [ lines::l#2 line_ydxi::xd#2 line_ydxi::yd#5 line_ydxi::y1#6 line_ydxi::x#3 line_ydxi::y#3 line_ydxi::e#3 plot::x#4 plot::y#4 plot::plotter_x#0 ] main:2::lines:12::line:21::line_xdyi:35::plot:114 [ lines::l#2 line_xdyi::yd#2 line_xdyi::xd#5 line_xdyi::x1#6 line_xdyi::x#3 line_xdyi::y#3 line_xdyi::e#3 plot::x#4 plot::y#4 plot::plotter_x#0 ] main:2::lines:12::line:21::line_xdyi:80::plot:114 [ lines::l#2 line_xdyi::yd#2 line_xdyi::xd#5 line_xdyi::x1#6 line_xdyi::x#3 line_xdyi::y#3 line_xdyi::e#3 plot::x#4 plot::y#4 plot::plotter_x#0 ] main:2::lines:12::line:21::line_ydxd:56::plot:129 [ lines::l#2 line_ydxd::xd#2 line_ydxd::yd#5 line_ydxd::y1#6 line_ydxd::x#3 line_ydxd::y#2 line_ydxd::e#3 plot::x#4 plot::y#4 plot::plotter_x#0 ] main:2::lines:12::line:21::line_ydxd:72::plot:129 [ lines::l#2 line_ydxd::xd#2 line_ydxd::yd#5 line_ydxd::y1#6 line_ydxd::x#3 line_ydxd::y#2 line_ydxd::e#3 plot::x#4 plot::y#4 plot::plotter_x#0 ] main:2::lines:12::line:21::line_xdyd:50::plot:144 [ lines::l#2 line_xdyd::yd#2 line_xdyd::xd#5 line_xdyd::x1#6 line_xdyd::x#3 line_xdyd::y#3 line_xdyd::e#3 plot::x#4 plot::y#4 plot::plotter_x#0 ] main:2::lines:12::line:21::line_xdyd:66::plot:144 [ lines::l#2 line_xdyd::yd#2 line_xdyd::xd#5 line_xdyd::x1#6 line_xdyd::x#3 line_xdyd::y#3 line_xdyd::e#3 plot::x#4 plot::y#4 plot::plotter_x#0 ] ) -- vwuz1=pbuc1_derefidx_vbuxx_word_pbuc2_derefidx_vbuxx 
     lda plot_xhi,x
@@ -6107,7 +6107,7 @@ plot: {
 }
 //SEG205 line_xdyi
 line_xdyi: {
-    .label _6 = $a
+    .label _6 = 8
     .label y = 5
     .label x1 = 7
     .label xd = 3
@@ -6257,9 +6257,9 @@ line_ydxd: {
 }
 //SEG261 line_xdyd
 line_xdyd: {
-    .label _6 = $a
+    .label _6 = 7
     .label y = 5
-    .label x1 = 7
+    .label x1 = 8
     .label xd = 3
     .label yd = 4
     .label e = 6
@@ -6334,7 +6334,7 @@ line_xdyd: {
 //SEG289 init_plot_tables
 init_plot_tables: {
     .label _6 = 2
-    .label yoffs = 8
+    .label yoffs = 9
   //SEG290 [155] phi from init_plot_tables to init_plot_tables::@1 [phi:init_plot_tables->init_plot_tables::@1]
   b1_from_init_plot_tables:
   //SEG291 [155] phi (byte) init_plot_tables::bits#3 = (byte/word/signed word/dword/signed dword) 128 [phi:init_plot_tables->init_plot_tables::@1#0] -- vbuyy=vbuc1 
@@ -6456,8 +6456,8 @@ init_plot_tables: {
 }
 //SEG336 init_screen
 init_screen: {
-    .label b = 8
+    .label b = 9
-    .label c = 8
+    .label c = 9
   //SEG337 [181] phi from init_screen to init_screen::@1 [phi:init_screen->init_screen::@1]
   b1_from_init_screen:
   //SEG338 [181] phi (byte*) init_screen::b#2 = (const byte*) BITMAP#0 [phi:init_screen->init_screen::@1#0] -- pbuz1=pbuc1 
@@ -6758,19 +6758,19 @@ FINAL SYMBOL TABLE
 (byte) init_plot_tables::y#1 reg byte x 16.5
 (byte) init_plot_tables::y#2 reg byte x 6.0
 (byte*) init_plot_tables::yoffs
-(byte*) init_plot_tables::yoffs#1 yoffs zp ZP_WORD:8 22.0
+(byte*) init_plot_tables::yoffs#1 yoffs zp ZP_WORD:9 22.0
-(byte*) init_plot_tables::yoffs#2 yoffs zp ZP_WORD:8 6.111111111111112
+(byte*) init_plot_tables::yoffs#2 yoffs zp ZP_WORD:9 6.111111111111112
-(byte*) init_plot_tables::yoffs#4 yoffs zp ZP_WORD:8 11.0
+(byte*) init_plot_tables::yoffs#4 yoffs zp ZP_WORD:9 11.0
 (void()) init_screen()
 (label) init_screen::@1
 (label) init_screen::@2
 (label) init_screen::@return
 (byte*) init_screen::b
-(byte*) init_screen::b#1 b zp ZP_WORD:8 16.5
+(byte*) init_screen::b#1 b zp ZP_WORD:9 16.5
-(byte*) init_screen::b#2 b zp ZP_WORD:8 16.5
+(byte*) init_screen::b#2 b zp ZP_WORD:9 16.5
 (byte*) init_screen::c
-(byte*) init_screen::c#1 c zp ZP_WORD:8 16.5
+(byte*) init_screen::c#1 c zp ZP_WORD:9 16.5
-(byte*) init_screen::c#2 c zp ZP_WORD:8 16.5
+(byte*) init_screen::c#2 c zp ZP_WORD:9 16.5
 (void()) line((byte) line::x0 , (byte) line::x1 , (byte) line::y0 , (byte) line::y1)
 (label) line::@1
 (label) line::@10
@@ -6790,7 +6790,7 @@ FINAL SYMBOL TABLE
 (byte) line::x0
 (byte) line::x0#0 x0 zp ZP_BYTE:7 5.173913043478264
 (byte) line::x1
-(byte) line::x1#0 x1 zp ZP_BYTE:10 5.409090909090908
+(byte) line::x1#0 x1 zp ZP_BYTE:8 5.409090909090908
 (byte) line::xd
 (byte) line::xd#0 xd zp ZP_BYTE:3 0.7
 (byte) line::xd#1 xd zp ZP_BYTE:3 0.7
@@ -6804,7 +6804,7 @@ FINAL SYMBOL TABLE
 (byte) line::yd#10 yd zp ZP_BYTE:4 0.8888888888888888
 (byte) line::yd#3 yd zp ZP_BYTE:4 0.8888888888888888
 (void()) line_xdyd((byte) line_xdyd::x , (byte) line_xdyd::y , (byte) line_xdyd::x1 , (byte) line_xdyd::xd , (byte) line_xdyd::yd)
-(byte/word~) line_xdyd::$6 $6 zp ZP_BYTE:10 2002.0
+(byte/word~) line_xdyd::$6 $6 zp ZP_BYTE:7 2002.0
 (label) line_xdyd::@1
 (label) line_xdyd::@2
 (label) line_xdyd::@3
@@ -6823,9 +6823,9 @@ FINAL SYMBOL TABLE
 (byte) line_xdyd::x#3 reg byte x 751.25
 (byte) line_xdyd::x#6 reg byte x 3.0
 (byte) line_xdyd::x1
-(byte) line_xdyd::x1#0 x1 zp ZP_BYTE:7 1.3333333333333333
+(byte) line_xdyd::x1#0 x1 zp ZP_BYTE:8 1.3333333333333333
-(byte) line_xdyd::x1#1 x1 zp ZP_BYTE:7 1.3333333333333333
+(byte) line_xdyd::x1#1 x1 zp ZP_BYTE:8 1.3333333333333333
-(byte) line_xdyd::x1#6 x1 zp ZP_BYTE:7 71.78571428571429
+(byte) line_xdyd::x1#6 x1 zp ZP_BYTE:8 71.78571428571429
 (byte) line_xdyd::xd
 (byte) line_xdyd::xd#0 xd zp ZP_BYTE:3 2.0
 (byte) line_xdyd::xd#1 xd zp ZP_BYTE:3 2.0
@@ -6842,7 +6842,7 @@ FINAL SYMBOL TABLE
 (byte) line_xdyd::yd#1 yd zp ZP_BYTE:4 4.0
 (byte) line_xdyd::yd#2 yd zp ZP_BYTE:4 71.92857142857143
 (void()) line_xdyi((byte) line_xdyi::x , (byte) line_xdyi::y , (byte) line_xdyi::x1 , (byte) line_xdyi::xd , (byte) line_xdyi::yd)
-(byte/word~) line_xdyi::$6 $6 zp ZP_BYTE:10 2002.0
+(byte/word~) line_xdyi::$6 $6 zp ZP_BYTE:8 2002.0
 (label) line_xdyi::@1
 (label) line_xdyi::@2
 (label) line_xdyi::@3
@@ -6974,12 +6974,12 @@ FINAL SYMBOL TABLE
 (label) main::@5
 (label) main::@return
 (void()) plot((byte) plot::x , (byte) plot::y)
-(word~) plot::$0 $0 zp ZP_WORD:8 1.0
+(word~) plot::$0 $0 zp ZP_WORD:9 1.0
 (byte~) plot::$1 reg byte a 4.0
 (label) plot::@return
 (byte*) plot::plotter
 (word) plot::plotter_x
-(word) plot::plotter_x#0 plotter_x zp ZP_WORD:8 2.0
+(word) plot::plotter_x#0 plotter_x zp ZP_WORD:9 2.0
 (word) plot::plotter_y
 (word) plot::plotter_y#0 plotter_y zp ZP_WORD:11 4.0
 (byte) plot::x
@@ -7006,22 +7006,22 @@ FINAL SYMBOL TABLE
 (const byte[256]) plot_ylo#0 plot_ylo = { fill( 256, 0) }
 
 zp ZP_BYTE:2 [ lines::l#2 lines::l#1 init_plot_tables::$6 ]
-zp ZP_BYTE:3 [ line_ydxi::xd#2 line_ydxi::xd#1 line_ydxi::xd#0 line::xd#1 line_xdyi::xd#5 line_xdyi::xd#0 line_xdyi::xd#1 line::xd#0 line_ydxd::xd#2 line_ydxd::xd#1 line_ydxd::xd#0 line_xdyd::xd#5 line_xdyd::xd#0 line_xdyd::xd#1 ]
+zp ZP_BYTE:3 [ line_ydxi::xd#2 line_ydxi::xd#1 line_ydxi::xd#0 line::xd#1 line::xd#0 line_xdyi::xd#5 line_xdyi::xd#0 line_xdyi::xd#1 line_ydxd::xd#2 line_ydxd::xd#1 line_ydxd::xd#0 line_xdyd::xd#5 line_xdyd::xd#0 line_xdyd::xd#1 ]
-zp ZP_BYTE:4 [ line_ydxi::yd#5 line_ydxi::yd#1 line_ydxi::yd#0 line::yd#1 line_xdyi::yd#2 line_xdyi::yd#0 line_xdyi::yd#1 line::yd#10 line_ydxd::yd#5 line_ydxd::yd#1 line_ydxd::yd#0 line::yd#0 line_xdyd::yd#2 line_xdyd::yd#0 line_xdyd::yd#1 line::yd#3 ]
+zp ZP_BYTE:4 [ line_ydxi::yd#5 line_ydxi::yd#1 line_ydxi::yd#0 line::yd#1 line::yd#10 line_xdyi::yd#2 line_xdyi::yd#0 line_xdyi::yd#1 line_ydxd::yd#5 line_ydxd::yd#1 line_ydxd::yd#0 line::yd#0 line::yd#3 line_xdyd::yd#2 line_xdyd::yd#0 line_xdyd::yd#1 ]
 zp ZP_BYTE:5 [ line_ydxi::y1#6 line_ydxi::y1#1 line_ydxi::y1#0 line::y0#0 line_xdyi::y#3 line_xdyi::y#5 line_xdyi::y#0 line_xdyi::y#1 line_xdyi::y#6 line_xdyi::y#2 line_ydxd::y1#6 line_ydxd::y1#1 line_ydxd::y1#0 line_xdyd::y#3 line_xdyd::y#5 line_xdyd::y#0 line_xdyd::y#1 line_xdyd::y#6 line_xdyd::y#2 ]
 reg byte x [ line_ydxi::x#3 line_ydxi::x#5 line_ydxi::x#1 line_ydxi::x#0 line_ydxi::x#6 line_ydxi::x#2 ]
 zp ZP_BYTE:6 [ line_ydxi::y#3 line_ydxi::y#6 line_ydxi::y#1 line_ydxi::y#0 line_ydxi::y#2 line_xdyi::e#3 line_xdyi::e#0 line_xdyi::e#6 line_xdyi::e#2 line_xdyi::e#1 line_ydxd::y#2 line_ydxd::y#7 line_ydxd::y#1 line_ydxd::y#0 line_ydxd::y#3 line_xdyd::e#3 line_xdyd::e#0 line_xdyd::e#6 line_xdyd::e#2 line_xdyd::e#1 ]
-zp ZP_BYTE:7 [ line_ydxi::e#3 line_ydxi::e#0 line_ydxi::e#6 line_ydxi::e#2 line_ydxi::e#1 line_xdyi::x1#6 line_xdyi::x1#0 line_xdyi::x1#1 line::x0#0 line_xdyd::x1#6 line_xdyd::x1#0 line_xdyd::x1#1 line_ydxd::e#3 line_ydxd::e#0 line_ydxd::e#6 line_ydxd::e#2 line_ydxd::e#1 ]
+zp ZP_BYTE:7 [ line_ydxi::e#3 line_ydxi::e#0 line_ydxi::e#6 line_ydxi::e#2 line_ydxi::e#1 line_xdyi::x1#6 line_xdyi::x1#0 line_xdyi::x1#1 line::x0#0 line_ydxd::e#3 line_ydxd::e#0 line_ydxd::e#6 line_ydxd::e#2 line_ydxd::e#1 line_xdyd::$6 ]
 reg byte x [ plot::x#4 plot::x#1 plot::x#0 plot::x#3 plot::x#2 ]
 reg byte y [ plot::y#4 plot::y#1 plot::y#0 plot::y#3 plot::y#2 ]
 reg byte x [ line_xdyi::x#3 line_xdyi::x#6 line_xdyi::x#0 line_xdyi::x#1 line_xdyi::x#2 ]
 reg byte x [ line_ydxd::x#3 line_ydxd::x#5 line_ydxd::x#1 line_ydxd::x#0 line_ydxd::x#6 line_ydxd::x#2 ]
+zp ZP_BYTE:8 [ line_xdyd::x1#6 line_xdyd::x1#0 line_xdyd::x1#1 line::x1#0 line_xdyi::$6 ]
 reg byte x [ line_xdyd::x#3 line_xdyd::x#6 line_xdyd::x#0 line_xdyd::x#1 line_xdyd::x#2 ]
 reg byte x [ init_plot_tables::x#2 init_plot_tables::x#1 ]
 reg byte y [ init_plot_tables::bits#3 init_plot_tables::bits#4 init_plot_tables::bits#1 ]
 reg byte x [ init_plot_tables::y#2 init_plot_tables::y#1 ]
-zp ZP_WORD:8 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 plot::plotter_x#0 plot::$0 ]
+zp ZP_WORD:9 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 plot::plotter_x#0 plot::$0 ]
-zp ZP_BYTE:10 [ line::x1#0 line_xdyi::$6 line_xdyd::$6 ]
 reg byte y [ line::y1#0 ]
 reg byte y [ line_ydxi::$6 ]
 zp ZP_WORD:11 [ plot::plotter_y#0 ]
@@ -7132,7 +7132,7 @@ lines: {
 //SEG43 line
 line: {
     .label x0 = 7
-    .label x1 = $a
+    .label x1 = 8
     .label y0 = 5
     .label xd = 3
     .label yd = 4
@@ -7222,9 +7222,8 @@ line: {
     ldx x0
   //SEG84 [46] (byte) line_xdyd::y#0 ← (byte) line::y0#0 [ line::x1#0 line::xd#1 line::yd#0 line_xdyd::x#0 line_xdyd::y#0 ] ( main:2::lines:12::line:21 [ lines::l#2 line::x1#0 line::xd#1 line::yd#0 line_xdyd::x#0 line_xdyd::y#0 ] )
     // (byte) line_xdyd::y#0 = (byte) line::y0#0  // register copy zp ZP_BYTE:5
-  //SEG85 [47] (byte) line_xdyd::x1#0 ← (byte) line::x1#0 [ line::xd#1 line::yd#0 line_xdyd::x#0 line_xdyd::y#0 line_xdyd::x1#0 ] ( main:2::lines:12::line:21 [ lines::l#2 line::xd#1 line::yd#0 line_xdyd::x#0 line_xdyd::y#0 line_xdyd::x1#0 ] ) -- vbuz1=vbuz2 
+  //SEG85 [47] (byte) line_xdyd::x1#0 ← (byte) line::x1#0 [ line::xd#1 line::yd#0 line_xdyd::x#0 line_xdyd::y#0 line_xdyd::x1#0 ] ( main:2::lines:12::line:21 [ lines::l#2 line::xd#1 line::yd#0 line_xdyd::x#0 line_xdyd::y#0 line_xdyd::x1#0 ] )
-    lda x1
+    // (byte) line_xdyd::x1#0 = (byte) line::x1#0  // register copy zp ZP_BYTE:8
-    sta line_xdyd.x1
   //SEG86 [48] (byte) line_xdyd::xd#0 ← (byte) line::xd#1 [ line::yd#0 line_xdyd::x#0 line_xdyd::y#0 line_xdyd::x1#0 line_xdyd::xd#0 ] ( main:2::lines:12::line:21 [ lines::l#2 line::yd#0 line_xdyd::x#0 line_xdyd::y#0 line_xdyd::x1#0 line_xdyd::xd#0 ] )
     // (byte) line_xdyd::xd#0 = (byte) line::xd#1  // register copy zp ZP_BYTE:3
   //SEG87 [49] (byte) line_xdyd::yd#0 ← (byte) line::yd#0 [ line_xdyd::x#0 line_xdyd::y#0 line_xdyd::x1#0 line_xdyd::xd#0 line_xdyd::yd#0 ] ( main:2::lines:12::line:21 [ lines::l#2 line_xdyd::x#0 line_xdyd::y#0 line_xdyd::x1#0 line_xdyd::xd#0 line_xdyd::yd#0 ] )
@@ -7285,8 +7284,9 @@ line: {
     ldx x1
   //SEG116 [62] (byte) line_xdyd::y#1 ← (byte) line::y1#0 [ line::x0#0 line::xd#0 line::yd#3 line_xdyd::x#1 line_xdyd::y#1 ] ( main:2::lines:12::line:21 [ lines::l#2 line::x0#0 line::xd#0 line::yd#3 line_xdyd::x#1 line_xdyd::y#1 ] ) -- vbuz1=vbuyy 
     sty line_xdyd.y
-  //SEG117 [63] (byte) line_xdyd::x1#1 ← (byte) line::x0#0 [ line::xd#0 line::yd#3 line_xdyd::x#1 line_xdyd::y#1 line_xdyd::x1#1 ] ( main:2::lines:12::line:21 [ lines::l#2 line::xd#0 line::yd#3 line_xdyd::x#1 line_xdyd::y#1 line_xdyd::x1#1 ] )
+  //SEG117 [63] (byte) line_xdyd::x1#1 ← (byte) line::x0#0 [ line::xd#0 line::yd#3 line_xdyd::x#1 line_xdyd::y#1 line_xdyd::x1#1 ] ( main:2::lines:12::line:21 [ lines::l#2 line::xd#0 line::yd#3 line_xdyd::x#1 line_xdyd::y#1 line_xdyd::x1#1 ] ) -- vbuz1=vbuz2 
-    // (byte) line_xdyd::x1#1 = (byte) line::x0#0  // register copy zp ZP_BYTE:7
+    lda x0
+    sta line_xdyd.x1
   //SEG118 [64] (byte) line_xdyd::xd#1 ← (byte) line::xd#0 [ line::yd#3 line_xdyd::x#1 line_xdyd::y#1 line_xdyd::x1#1 line_xdyd::xd#1 ] ( main:2::lines:12::line:21 [ lines::l#2 line::yd#3 line_xdyd::x#1 line_xdyd::y#1 line_xdyd::x1#1 line_xdyd::xd#1 ] )
     // (byte) line_xdyd::xd#1 = (byte) line::xd#0  // register copy zp ZP_BYTE:3
   //SEG119 [65] (byte) line_xdyd::yd#1 ← (byte) line::yd#3 [ line_xdyd::x#1 line_xdyd::y#1 line_xdyd::x1#1 line_xdyd::xd#1 line_xdyd::yd#1 ] ( main:2::lines:12::line:21 [ lines::l#2 line_xdyd::x#1 line_xdyd::y#1 line_xdyd::x1#1 line_xdyd::xd#1 line_xdyd::yd#1 ] )
@@ -7438,8 +7438,8 @@ line_ydxi: {
 }
 //SEG197 plot
 plot: {
-    .label _0 = 8
+    .label _0 = 9
-    .label plotter_x = 8
+    .label plotter_x = 9
     .label plotter_y = $b
   //SEG198 [103] (word) plot::plotter_x#0 ← *((const byte[256]) plot_xhi#0 + (byte) plot::x#4) w= *((const byte[256]) plot_xlo#0 + (byte) plot::x#4) [ plot::x#4 plot::y#4 plot::plotter_x#0 ] ( main:2::lines:12::line:21::line_ydxi:42::plot:92 [ lines::l#2 line_ydxi::xd#2 line_ydxi::yd#5 line_ydxi::y1#6 line_ydxi::x#3 line_ydxi::y#3 line_ydxi::e#3 plot::x#4 plot::y#4 plot::plotter_x#0 ] main:2::lines:12::line:21::line_ydxi:86::plot:92 [ lines::l#2 line_ydxi::xd#2 line_ydxi::yd#5 line_ydxi::y1#6 line_ydxi::x#3 line_ydxi::y#3 line_ydxi::e#3 plot::x#4 plot::y#4 plot::plotter_x#0 ] main:2::lines:12::line:21::line_xdyi:35::plot:114 [ lines::l#2 line_xdyi::yd#2 line_xdyi::xd#5 line_xdyi::x1#6 line_xdyi::x#3 line_xdyi::y#3 line_xdyi::e#3 plot::x#4 plot::y#4 plot::plotter_x#0 ] main:2::lines:12::line:21::line_xdyi:80::plot:114 [ lines::l#2 line_xdyi::yd#2 line_xdyi::xd#5 line_xdyi::x1#6 line_xdyi::x#3 line_xdyi::y#3 line_xdyi::e#3 plot::x#4 plot::y#4 plot::plotter_x#0 ] main:2::lines:12::line:21::line_ydxd:56::plot:129 [ lines::l#2 line_ydxd::xd#2 line_ydxd::yd#5 line_ydxd::y1#6 line_ydxd::x#3 line_ydxd::y#2 line_ydxd::e#3 plot::x#4 plot::y#4 plot::plotter_x#0 ] main:2::lines:12::line:21::line_ydxd:72::plot:129 [ lines::l#2 line_ydxd::xd#2 line_ydxd::yd#5 line_ydxd::y1#6 line_ydxd::x#3 line_ydxd::y#2 line_ydxd::e#3 plot::x#4 plot::y#4 plot::plotter_x#0 ] main:2::lines:12::line:21::line_xdyd:50::plot:144 [ lines::l#2 line_xdyd::yd#2 line_xdyd::xd#5 line_xdyd::x1#6 line_xdyd::x#3 line_xdyd::y#3 line_xdyd::e#3 plot::x#4 plot::y#4 plot::plotter_x#0 ] main:2::lines:12::line:21::line_xdyd:66::plot:144 [ lines::l#2 line_xdyd::yd#2 line_xdyd::xd#5 line_xdyd::x1#6 line_xdyd::x#3 line_xdyd::y#3 line_xdyd::e#3 plot::x#4 plot::y#4 plot::plotter_x#0 ] ) -- vwuz1=pbuc1_derefidx_vbuxx_word_pbuc2_derefidx_vbuxx 
     lda plot_xhi,x
@@ -7471,7 +7471,7 @@ plot: {
 }
 //SEG205 line_xdyi
 line_xdyi: {
-    .label _6 = $a
+    .label _6 = 8
     .label y = 5
     .label x1 = 7
     .label xd = 3
@@ -7595,9 +7595,9 @@ line_ydxd: {
 }
 //SEG261 line_xdyd
 line_xdyd: {
-    .label _6 = $a
+    .label _6 = 7
     .label y = 5
-    .label x1 = 7
+    .label x1 = 8
     .label xd = 3
     .label yd = 4
     .label e = 6
@@ -7659,7 +7659,7 @@ line_xdyd: {
 //SEG289 init_plot_tables
 init_plot_tables: {
     .label _6 = 2
-    .label yoffs = 8
+    .label yoffs = 9
   //SEG290 [155] phi from init_plot_tables to init_plot_tables::@1 [phi:init_plot_tables->init_plot_tables::@1]
   //SEG291 [155] phi (byte) init_plot_tables::bits#3 = (byte/word/signed word/dword/signed dword) 128 [phi:init_plot_tables->init_plot_tables::@1#0] -- vbuyy=vbuc1 
     ldy #$80
@@ -7758,8 +7758,8 @@ init_plot_tables: {
 }
 //SEG336 init_screen
 init_screen: {
-    .label b = 8
+    .label b = 9
-    .label c = 8
+    .label c = 9
   //SEG337 [181] phi from init_screen to init_screen::@1 [phi:init_screen->init_screen::@1]
   //SEG338 [181] phi (byte*) init_screen::b#2 = (const byte*) BITMAP#0 [phi:init_screen->init_screen::@1#0] -- pbuz1=pbuc1 
     lda #<BITMAP

src/test/java/dk/camelot64/kickc/test/ref/bitmap-bresenham.sym

@@ -44,19 +44,19 @@
 (byte) init_plot_tables::y#1 reg byte x 16.5
 (byte) init_plot_tables::y#2 reg byte x 6.0
 (byte*) init_plot_tables::yoffs
-(byte*) init_plot_tables::yoffs#1 yoffs zp ZP_WORD:8 22.0
+(byte*) init_plot_tables::yoffs#1 yoffs zp ZP_WORD:9 22.0
-(byte*) init_plot_tables::yoffs#2 yoffs zp ZP_WORD:8 6.111111111111112
+(byte*) init_plot_tables::yoffs#2 yoffs zp ZP_WORD:9 6.111111111111112
-(byte*) init_plot_tables::yoffs#4 yoffs zp ZP_WORD:8 11.0
+(byte*) init_plot_tables::yoffs#4 yoffs zp ZP_WORD:9 11.0
 (void()) init_screen()
 (label) init_screen::@1
 (label) init_screen::@2
 (label) init_screen::@return
 (byte*) init_screen::b
-(byte*) init_screen::b#1 b zp ZP_WORD:8 16.5
+(byte*) init_screen::b#1 b zp ZP_WORD:9 16.5
-(byte*) init_screen::b#2 b zp ZP_WORD:8 16.5
+(byte*) init_screen::b#2 b zp ZP_WORD:9 16.5
 (byte*) init_screen::c
-(byte*) init_screen::c#1 c zp ZP_WORD:8 16.5
+(byte*) init_screen::c#1 c zp ZP_WORD:9 16.5
-(byte*) init_screen::c#2 c zp ZP_WORD:8 16.5
+(byte*) init_screen::c#2 c zp ZP_WORD:9 16.5
 (void()) line((byte) line::x0 , (byte) line::x1 , (byte) line::y0 , (byte) line::y1)
 (label) line::@1
 (label) line::@10
@@ -76,7 +76,7 @@
 (byte) line::x0
 (byte) line::x0#0 x0 zp ZP_BYTE:7 5.173913043478264
 (byte) line::x1
-(byte) line::x1#0 x1 zp ZP_BYTE:10 5.409090909090908
+(byte) line::x1#0 x1 zp ZP_BYTE:8 5.409090909090908
 (byte) line::xd
 (byte) line::xd#0 xd zp ZP_BYTE:3 0.7
 (byte) line::xd#1 xd zp ZP_BYTE:3 0.7
@@ -90,7 +90,7 @@
 (byte) line::yd#10 yd zp ZP_BYTE:4 0.8888888888888888
 (byte) line::yd#3 yd zp ZP_BYTE:4 0.8888888888888888
 (void()) line_xdyd((byte) line_xdyd::x , (byte) line_xdyd::y , (byte) line_xdyd::x1 , (byte) line_xdyd::xd , (byte) line_xdyd::yd)
-(byte/word~) line_xdyd::$6 $6 zp ZP_BYTE:10 2002.0
+(byte/word~) line_xdyd::$6 $6 zp ZP_BYTE:7 2002.0
 (label) line_xdyd::@1
 (label) line_xdyd::@2
 (label) line_xdyd::@3
@@ -109,9 +109,9 @@
 (byte) line_xdyd::x#3 reg byte x 751.25
 (byte) line_xdyd::x#6 reg byte x 3.0
 (byte) line_xdyd::x1
-(byte) line_xdyd::x1#0 x1 zp ZP_BYTE:7 1.3333333333333333
+(byte) line_xdyd::x1#0 x1 zp ZP_BYTE:8 1.3333333333333333
-(byte) line_xdyd::x1#1 x1 zp ZP_BYTE:7 1.3333333333333333
+(byte) line_xdyd::x1#1 x1 zp ZP_BYTE:8 1.3333333333333333
-(byte) line_xdyd::x1#6 x1 zp ZP_BYTE:7 71.78571428571429
+(byte) line_xdyd::x1#6 x1 zp ZP_BYTE:8 71.78571428571429
 (byte) line_xdyd::xd
 (byte) line_xdyd::xd#0 xd zp ZP_BYTE:3 2.0
 (byte) line_xdyd::xd#1 xd zp ZP_BYTE:3 2.0
@@ -128,7 +128,7 @@
 (byte) line_xdyd::yd#1 yd zp ZP_BYTE:4 4.0
 (byte) line_xdyd::yd#2 yd zp ZP_BYTE:4 71.92857142857143
 (void()) line_xdyi((byte) line_xdyi::x , (byte) line_xdyi::y , (byte) line_xdyi::x1 , (byte) line_xdyi::xd , (byte) line_xdyi::yd)
-(byte/word~) line_xdyi::$6 $6 zp ZP_BYTE:10 2002.0
+(byte/word~) line_xdyi::$6 $6 zp ZP_BYTE:8 2002.0
 (label) line_xdyi::@1
 (label) line_xdyi::@2
 (label) line_xdyi::@3
@@ -260,12 +260,12 @@
 (label) main::@5
 (label) main::@return
 (void()) plot((byte) plot::x , (byte) plot::y)
-(word~) plot::$0 $0 zp ZP_WORD:8 1.0
+(word~) plot::$0 $0 zp ZP_WORD:9 1.0
 (byte~) plot::$1 reg byte a 4.0
 (label) plot::@return
 (byte*) plot::plotter
 (word) plot::plotter_x
-(word) plot::plotter_x#0 plotter_x zp ZP_WORD:8 2.0
+(word) plot::plotter_x#0 plotter_x zp ZP_WORD:9 2.0
 (word) plot::plotter_y
 (word) plot::plotter_y#0 plotter_y zp ZP_WORD:11 4.0
 (byte) plot::x
@@ -292,22 +292,22 @@
 (const byte[256]) plot_ylo#0 plot_ylo = { fill( 256, 0) }
 
 zp ZP_BYTE:2 [ lines::l#2 lines::l#1 init_plot_tables::$6 ]
-zp ZP_BYTE:3 [ line_ydxi::xd#2 line_ydxi::xd#1 line_ydxi::xd#0 line::xd#1 line_xdyi::xd#5 line_xdyi::xd#0 line_xdyi::xd#1 line::xd#0 line_ydxd::xd#2 line_ydxd::xd#1 line_ydxd::xd#0 line_xdyd::xd#5 line_xdyd::xd#0 line_xdyd::xd#1 ]
+zp ZP_BYTE:3 [ line_ydxi::xd#2 line_ydxi::xd#1 line_ydxi::xd#0 line::xd#1 line::xd#0 line_xdyi::xd#5 line_xdyi::xd#0 line_xdyi::xd#1 line_ydxd::xd#2 line_ydxd::xd#1 line_ydxd::xd#0 line_xdyd::xd#5 line_xdyd::xd#0 line_xdyd::xd#1 ]
-zp ZP_BYTE:4 [ line_ydxi::yd#5 line_ydxi::yd#1 line_ydxi::yd#0 line::yd#1 line_xdyi::yd#2 line_xdyi::yd#0 line_xdyi::yd#1 line::yd#10 line_ydxd::yd#5 line_ydxd::yd#1 line_ydxd::yd#0 line::yd#0 line_xdyd::yd#2 line_xdyd::yd#0 line_xdyd::yd#1 line::yd#3 ]
+zp ZP_BYTE:4 [ line_ydxi::yd#5 line_ydxi::yd#1 line_ydxi::yd#0 line::yd#1 line::yd#10 line_xdyi::yd#2 line_xdyi::yd#0 line_xdyi::yd#1 line_ydxd::yd#5 line_ydxd::yd#1 line_ydxd::yd#0 line::yd#0 line::yd#3 line_xdyd::yd#2 line_xdyd::yd#0 line_xdyd::yd#1 ]
 zp ZP_BYTE:5 [ line_ydxi::y1#6 line_ydxi::y1#1 line_ydxi::y1#0 line::y0#0 line_xdyi::y#3 line_xdyi::y#5 line_xdyi::y#0 line_xdyi::y#1 line_xdyi::y#6 line_xdyi::y#2 line_ydxd::y1#6 line_ydxd::y1#1 line_ydxd::y1#0 line_xdyd::y#3 line_xdyd::y#5 line_xdyd::y#0 line_xdyd::y#1 line_xdyd::y#6 line_xdyd::y#2 ]
 reg byte x [ line_ydxi::x#3 line_ydxi::x#5 line_ydxi::x#1 line_ydxi::x#0 line_ydxi::x#6 line_ydxi::x#2 ]
 zp ZP_BYTE:6 [ line_ydxi::y#3 line_ydxi::y#6 line_ydxi::y#1 line_ydxi::y#0 line_ydxi::y#2 line_xdyi::e#3 line_xdyi::e#0 line_xdyi::e#6 line_xdyi::e#2 line_xdyi::e#1 line_ydxd::y#2 line_ydxd::y#7 line_ydxd::y#1 line_ydxd::y#0 line_ydxd::y#3 line_xdyd::e#3 line_xdyd::e#0 line_xdyd::e#6 line_xdyd::e#2 line_xdyd::e#1 ]
-zp ZP_BYTE:7 [ line_ydxi::e#3 line_ydxi::e#0 line_ydxi::e#6 line_ydxi::e#2 line_ydxi::e#1 line_xdyi::x1#6 line_xdyi::x1#0 line_xdyi::x1#1 line::x0#0 line_xdyd::x1#6 line_xdyd::x1#0 line_xdyd::x1#1 line_ydxd::e#3 line_ydxd::e#0 line_ydxd::e#6 line_ydxd::e#2 line_ydxd::e#1 ]
+zp ZP_BYTE:7 [ line_ydxi::e#3 line_ydxi::e#0 line_ydxi::e#6 line_ydxi::e#2 line_ydxi::e#1 line_xdyi::x1#6 line_xdyi::x1#0 line_xdyi::x1#1 line::x0#0 line_ydxd::e#3 line_ydxd::e#0 line_ydxd::e#6 line_ydxd::e#2 line_ydxd::e#1 line_xdyd::$6 ]
 reg byte x [ plot::x#4 plot::x#1 plot::x#0 plot::x#3 plot::x#2 ]
 reg byte y [ plot::y#4 plot::y#1 plot::y#0 plot::y#3 plot::y#2 ]
 reg byte x [ line_xdyi::x#3 line_xdyi::x#6 line_xdyi::x#0 line_xdyi::x#1 line_xdyi::x#2 ]
 reg byte x [ line_ydxd::x#3 line_ydxd::x#5 line_ydxd::x#1 line_ydxd::x#0 line_ydxd::x#6 line_ydxd::x#2 ]
+zp ZP_BYTE:8 [ line_xdyd::x1#6 line_xdyd::x1#0 line_xdyd::x1#1 line::x1#0 line_xdyi::$6 ]
 reg byte x [ line_xdyd::x#3 line_xdyd::x#6 line_xdyd::x#0 line_xdyd::x#1 line_xdyd::x#2 ]
 reg byte x [ init_plot_tables::x#2 init_plot_tables::x#1 ]
 reg byte y [ init_plot_tables::bits#3 init_plot_tables::bits#4 init_plot_tables::bits#1 ]
 reg byte x [ init_plot_tables::y#2 init_plot_tables::y#1 ]
-zp ZP_WORD:8 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 plot::plotter_x#0 plot::$0 ]
+zp ZP_WORD:9 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 plot::plotter_x#0 plot::$0 ]
-zp ZP_BYTE:10 [ line::x1#0 line_xdyi::$6 line_xdyd::$6 ]
 reg byte y [ line::y1#0 ]
 reg byte y [ line_ydxi::$6 ]
 zp ZP_WORD:11 [ plot::plotter_y#0 ]

src/test/java/dk/camelot64/kickc/test/ref/bitmap-plotter.log

@@ -2266,9 +2266,9 @@ Attempting to uplift remaining variables inzp ZP_BYTE:30 [ init_plot_tables::$6
 Uplifting [init_plot_tables] best 8251 combination zp ZP_BYTE:30 [ init_plot_tables::$6 ] 
 Attempting to uplift remaining variables inzp ZP_BYTE:12 [ plot::x#0 ]
 Uplifting [plot] best 8251 combination zp ZP_BYTE:12 [ plot::x#0 ] 
-Coalescing zero page register [ zp ZP_WORD:15 [ plot::plotter_x#1 ] ] with [ zp ZP_WORD:18 [ plot::plotter_x#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:15 [ plot::plotter_x#1 ] ] with [ zp ZP_WORD:18 [ plot::plotter_x#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:15 [ plot::plotter_x#1 plot::plotter_x#2 ] ] with [ zp ZP_WORD:26 [ plot::plotter#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:21 [ plot::plotter_y#1 ] ] with [ zp ZP_WORD:24 [ plot::plotter_y#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:21 [ plot::plotter_y#1 ] ] with [ zp ZP_WORD:24 [ plot::plotter_y#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:15 [ plot::plotter_x#1 plot::plotter_x#2 ] ] with [ zp ZP_WORD:26 [ plot::plotter#0 ] ] - score: 1
 Coalescing zero page register [ zp ZP_WORD:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 ] ] with [ zp ZP_WORD:8 [ init_screen::b#2 init_screen::b#1 ] ]
 Coalescing zero page register [ zp ZP_WORD:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 ] ] with [ zp ZP_WORD:10 [ init_screen::c#2 init_screen::c#1 ] ]
 Coalescing zero page register [ zp ZP_WORD:6 [ init_plot_tables::yoffs#2 init_plot_tables::yoffs#4 init_plot_tables::yoffs#1 init_screen::b#2 init_screen::b#1 init_screen::c#2 init_screen::c#1 ] ] with [ zp ZP_WORD:15 [ plot::plotter_x#1 plot::plotter_x#2 plot::plotter#0 ] ]

src/test/java/dk/camelot64/kickc/test/ref/constants.log

@@ -3130,8 +3130,8 @@ Attempting to uplift remaining variables inzp ZP_BYTE:15 [ assert_byte::c#3 ]
 Uplifting [assert_byte] best 2175 combination zp ZP_BYTE:15 [ assert_byte::c#3 ] 
 Attempting to uplift remaining variables inzp ZP_BYTE:5 [ assert_sbyte::c#5 ]
 Uplifting [assert_sbyte] best 2175 combination zp ZP_BYTE:5 [ assert_sbyte::c#5 ] 
-Coalescing zero page register [ zp ZP_WORD:2 [ assert_sbyte::msg#5 ] ] with [ zp ZP_WORD:8 [ print_str::str#10 print_str::str#11 print_str::str#1 print_str::str#5 print_str::str#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:2 [ assert_sbyte::msg#5 ] ] with [ zp ZP_WORD:8 [ print_str::str#10 print_str::str#11 print_str::str#1 print_str::str#5 print_str::str#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:2 [ assert_sbyte::msg#5 print_str::str#10 print_str::str#11 print_str::str#1 print_str::str#5 print_str::str#0 ] ] with [ zp ZP_WORD:12 [ assert_byte::msg#3 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:2 [ assert_sbyte::msg#5 print_str::str#10 print_str::str#11 print_str::str#1 print_str::str#5 print_str::str#0 ] ] with [ zp ZP_WORD:12 [ assert_byte::msg#3 ] ] - score: 1
 Coalescing zero page register [ zp ZP_WORD:2 [ assert_sbyte::msg#5 print_str::str#10 print_str::str#11 print_str::str#1 print_str::str#5 print_str::str#0 assert_byte::msg#3 ] ] with [ zp ZP_WORD:16 [ print_cls::sc#2 print_cls::sc#1 ] ]
 Coalescing zero page register [ zp ZP_BYTE:5 [ assert_sbyte::c#5 ] ] with [ zp ZP_BYTE:15 [ assert_byte::c#3 ] ]
 Allocated (was zp ZP_BYTE:5) zp ZP_BYTE:4 [ assert_sbyte::c#5 assert_byte::c#3 ]

src/test/java/dk/camelot64/kickc/test/ref/linegen.log

@@ -5151,11 +5151,11 @@ Uplifting [print_char] best 15832 combination reg byte a [ print_char::ch#2 prin
 Uplifting [print_ln] best 15832 combination 
 Attempting to uplift remaining variables inzp ZP_BYTE:2 [ main::i#10 main::i#1 ]
 Uplifting [main] best 15832 combination zp ZP_BYTE:2 [ main::i#10 main::i#1 ] 
-Coalescing zero page register [ zp ZP_WORD:15 [ lin16u_gen::max#3 ] ] with [ zp ZP_WORD:31 [ divr16u::rem#5 divr16u::rem#10 divr16u::rem#4 rem16u#22 divr16u::rem#11 divr16u::rem#6 divr16u::rem#0 divr16u::rem#1 divr16u::rem#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:15 [ lin16u_gen::max#3 ] ] with [ zp ZP_WORD:31 [ divr16u::rem#5 divr16u::rem#10 divr16u::rem#4 rem16u#22 divr16u::rem#11 divr16u::rem#6 divr16u::rem#0 divr16u::rem#1 divr16u::rem#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:15 [ lin16u_gen::max#3 divr16u::rem#5 divr16u::rem#10 divr16u::rem#4 rem16u#22 divr16u::rem#11 divr16u::rem#6 divr16u::rem#0 divr16u::rem#1 divr16u::rem#2 ] ] with [ zp ZP_WORD:40 [ lin16u_gen::ampl#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:15 [ lin16u_gen::max#3 divr16u::rem#5 divr16u::rem#10 divr16u::rem#4 rem16u#22 divr16u::rem#11 divr16u::rem#6 divr16u::rem#0 divr16u::rem#1 divr16u::rem#2 ] ] with [ zp ZP_WORD:40 [ lin16u_gen::ampl#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:35 [ divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 ] ] with [ zp ZP_WORD:42 [ divr16u::return#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:35 [ divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 ] ] with [ zp ZP_WORD:42 [ divr16u::return#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:35 [ divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#2 ] ] with [ zp ZP_WORD:46 [ divr16u::return#3 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:35 [ divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#2 ] ] with [ zp ZP_WORD:46 [ divr16u::return#3 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:35 [ divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#2 divr16u::return#3 ] ] with [ zp ZP_WORD:48 [ lin16u_gen::stepf#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:35 [ divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#2 divr16u::return#3 ] ] with [ zp ZP_WORD:48 [ lin16u_gen::stepf#0 ] ] - score: 1
 Coalescing zero page register [ zp ZP_WORD:3 [ line_cursor#11 line_cursor#21 line_cursor#1 ] ] with [ zp ZP_WORD:13 [ print_cls::sc#2 print_cls::sc#1 ] ]
 Coalescing zero page register [ zp ZP_WORD:3 [ line_cursor#11 line_cursor#21 line_cursor#1 print_cls::sc#2 print_cls::sc#1 ] ] with [ zp ZP_WORD:15 [ lin16u_gen::max#3 divr16u::rem#5 divr16u::rem#10 divr16u::rem#4 rem16u#22 divr16u::rem#11 divr16u::rem#6 divr16u::rem#0 divr16u::rem#1 divr16u::rem#2 lin16u_gen::ampl#0 ] ]
 Coalescing zero page register [ zp ZP_WORD:5 [ print_word::w#10 print_word::w#3 print_word::w#4 print_word::w#5 ] ] with [ zp ZP_WORD:11 [ print_str::str#10 print_str::str#12 print_str::str#0 ] ]

src/test/java/dk/camelot64/kickc/test/ref/scrollbig.log

@@ -3159,8 +3159,8 @@ Uplifting [main] best 24678 combination
 Uplifting [scroll_soft] best 24678 combination 
 Attempting to uplift remaining variables inzp ZP_BYTE:3 [ current_bit#29 current_bit#12 current_bit#21 current_bit#5 ]
 Uplifting [] best 24678 combination zp ZP_BYTE:3 [ current_bit#29 current_bit#12 current_bit#21 current_bit#5 ] 
-Coalescing zero page register [ zp ZP_WORD:4 [ current_chargen#27 current_chargen#11 current_chargen#19 current_chargen#5 ] ] with [ zp ZP_WORD:20 [ scroll_bit::$4 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:4 [ current_chargen#27 current_chargen#11 current_chargen#19 current_chargen#5 ] ] with [ zp ZP_WORD:20 [ scroll_bit::$4 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:4 [ current_chargen#27 current_chargen#11 current_chargen#19 current_chargen#5 scroll_bit::$4 ] ] with [ zp ZP_WORD:18 [ scroll_bit::c#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:4 [ current_chargen#27 current_chargen#11 current_chargen#19 current_chargen#5 scroll_bit::$4 ] ] with [ zp ZP_WORD:18 [ scroll_bit::c#0 ] ] - score: 1
 Coalescing zero page register [ zp ZP_WORD:4 [ current_chargen#27 current_chargen#11 current_chargen#19 current_chargen#5 scroll_bit::$4 scroll_bit::c#0 ] ] with [ zp ZP_WORD:14 [ fillscreen::cursor#2 fillscreen::cursor#1 ] ]
 Allocated (was zp ZP_BYTE:3) zp ZP_BYTE:2 [ current_bit#29 current_bit#12 current_bit#21 current_bit#5 ]
 Allocated (was zp ZP_WORD:4) zp ZP_WORD:3 [ current_chargen#27 current_chargen#11 current_chargen#19 current_chargen#5 scroll_bit::$4 scroll_bit::c#0 fillscreen::cursor#2 fillscreen::cursor#1 ]

src/test/java/dk/camelot64/kickc/test/ref/signed-words.log

@@ -2005,8 +2005,8 @@ Uplifting [init] best 8154 combination zp ZP_WORD:12 [ init::sc#2 init::sc#1 ] r
 Uplifting [] best 8154 combination zp ZP_WORD:6 [ yvel#9 yvel#12 yvel#10 yvel#22 ] zp ZP_WORD:4 [ yvel_init#13 yvel_init#11 yvel#4 yvel_init#3 ] zp ZP_WORD:8 [ xpos#9 xpos#12 xpos#10 ] zp ZP_WORD:10 [ ypos#10 ypos#13 ypos#11 ] zp ZP_WORD:2 [ xvel#12 xvel#10 xvel#14 ] 
 Uplifting [anim] best 8136 combination zp ZP_WORD:15 [ anim::$10 ] zp ZP_WORD:19 [ anim::$12 ] reg byte a [ anim::$14 ] reg byte a [ anim::$15 ] reg byte a [ anim::$16 ] zp ZP_WORD:21 [ anim::sprite_y#0 ] zp ZP_WORD:17 [ anim::sprite_x#0 ] 
 Uplifting [main] best 8136 combination 
-Coalescing zero page register [ zp ZP_WORD:15 [ anim::$10 ] ] with [ zp ZP_WORD:17 [ anim::sprite_x#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:15 [ anim::$10 ] ] with [ zp ZP_WORD:17 [ anim::sprite_x#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:19 [ anim::$12 ] ] with [ zp ZP_WORD:21 [ anim::sprite_y#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:19 [ anim::$12 ] ] with [ zp ZP_WORD:21 [ anim::sprite_y#0 ] ] - score: 1
 Coalescing zero page register [ zp ZP_WORD:2 [ xvel#12 xvel#10 xvel#14 ] ] with [ zp ZP_WORD:12 [ init::sc#2 init::sc#1 ] ]
 Allocated (was zp ZP_WORD:15) zp ZP_WORD:12 [ anim::$10 anim::sprite_x#0 ]
 Allocated (was zp ZP_WORD:19) zp ZP_WORD:14 [ anim::$12 anim::sprite_y#0 ]

src/test/java/dk/camelot64/kickc/test/ref/sinus-basic.log

@@ -3368,11 +3368,11 @@ Uplifting [sinFAC] best 6281 combination
 Uplifting [divFACby10] best 6281 combination 
 Attempting to uplift remaining variables inzp ZP_BYTE:2 [ main::i#10 main::i#1 ]
 Uplifting [main] best 6281 combination zp ZP_BYTE:2 [ main::i#10 main::i#1 ] 
-Coalescing zero page register [ zp ZP_WORD:9 [ prepareMEM::mem#5 prepareMEM::mem#4 prepareMEM::mem#7 prepareMEM::mem#1 ] ] with [ zp ZP_WORD:11 [ mulFACbyMEM::mem#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:9 [ prepareMEM::mem#5 prepareMEM::mem#4 prepareMEM::mem#7 prepareMEM::mem#1 ] ] with [ zp ZP_WORD:11 [ mulFACbyMEM::mem#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:9 [ prepareMEM::mem#5 prepareMEM::mem#4 prepareMEM::mem#7 prepareMEM::mem#1 mulFACbyMEM::mem#2 ] ] with [ zp ZP_WORD:13 [ setFAC::w#3 setFAC::w#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:9 [ prepareMEM::mem#5 prepareMEM::mem#4 prepareMEM::mem#7 prepareMEM::mem#1 mulFACbyMEM::mem#2 ] ] with [ zp ZP_WORD:13 [ setFAC::w#3 setFAC::w#1 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:9 [ prepareMEM::mem#5 prepareMEM::mem#4 prepareMEM::mem#7 prepareMEM::mem#1 mulFACbyMEM::mem#2 setFAC::w#3 setFAC::w#1 ] ] with [ zp ZP_WORD:15 [ setMEMtoFAC::mem#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:9 [ prepareMEM::mem#5 prepareMEM::mem#4 prepareMEM::mem#7 prepareMEM::mem#1 mulFACbyMEM::mem#2 setFAC::w#3 setFAC::w#1 ] ] with [ zp ZP_WORD:15 [ setMEMtoFAC::mem#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:17 [ getFAC::return#2 ] ] with [ zp ZP_WORD:19 [ print_word::w#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:17 [ getFAC::return#2 ] ] with [ zp ZP_WORD:19 [ print_word::w#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:17 [ getFAC::return#2 print_word::w#0 ] ] with [ zp ZP_WORD:23 [ getFAC::return#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:17 [ getFAC::return#2 print_word::w#0 ] ] with [ zp ZP_WORD:23 [ getFAC::return#0 ] ] - score: 1
 Coalescing zero page register [ zp ZP_WORD:9 [ prepareMEM::mem#5 prepareMEM::mem#4 prepareMEM::mem#7 prepareMEM::mem#1 mulFACbyMEM::mem#2 setFAC::w#3 setFAC::w#1 setMEMtoFAC::mem#2 ] ] with [ zp ZP_WORD:17 [ getFAC::return#2 print_word::w#0 getFAC::return#0 ] ]
 Allocated (was zp ZP_WORD:7) zp ZP_WORD:5 [ char_cursor#23 char_cursor#31 char_cursor#32 char_cursor#48 char_cursor#10 ]
 Allocated (was zp ZP_WORD:9) zp ZP_WORD:7 [ prepareMEM::mem#5 prepareMEM::mem#4 prepareMEM::mem#7 prepareMEM::mem#1 mulFACbyMEM::mem#2 setFAC::w#3 setFAC::w#1 setMEMtoFAC::mem#2 getFAC::return#2 print_word::w#0 getFAC::return#0 ]

src/test/java/dk/camelot64/kickc/test/ref/sinus-sprites.log

@@ -8076,15 +8076,15 @@ Attempting to uplift remaining variables inzp ZP_BYTE:14 [ gen_sintab::length#10
 Uplifting [gen_sintab] best 1061722 combination zp ZP_BYTE:14 [ gen_sintab::length#10 ] 
 Attempting to uplift remaining variables inzp ZP_BYTE:13 [ gen_sintab::min#2 ]
 Uplifting [gen_sintab] best 1061722 combination zp ZP_BYTE:13 [ gen_sintab::min#2 ] 
-Coalescing zero page register [ zp ZP_WORD:21 [ addMEMtoFAC::mem#2 ] ] with [ zp ZP_WORD:23 [ prepareMEM::mem#5 prepareMEM::mem#2 prepareMEM::mem#3 prepareMEM::mem#4 prepareMEM::mem#9 prepareMEM::mem#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:21 [ addMEMtoFAC::mem#2 ] ] with [ zp ZP_WORD:23 [ prepareMEM::mem#5 prepareMEM::mem#2 prepareMEM::mem#3 prepareMEM::mem#4 prepareMEM::mem#9 prepareMEM::mem#1 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:21 [ addMEMtoFAC::mem#2 prepareMEM::mem#5 prepareMEM::mem#2 prepareMEM::mem#3 prepareMEM::mem#4 prepareMEM::mem#9 prepareMEM::mem#1 ] ] with [ zp ZP_WORD:25 [ mulFACbyMEM::mem#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:55 [ getFAC::return#2 ] ] with [ zp ZP_WORD:57 [ gen_sintab::$23 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:21 [ addMEMtoFAC::mem#2 prepareMEM::mem#5 prepareMEM::mem#2 prepareMEM::mem#3 prepareMEM::mem#4 prepareMEM::mem#9 prepareMEM::mem#1 mulFACbyMEM::mem#2 ] ] with [ zp ZP_WORD:27 [ divMEMbyFAC::mem#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:55 [ getFAC::return#2 gen_sintab::$23 ] ] with [ zp ZP_WORD:60 [ getFAC::return#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:21 [ addMEMtoFAC::mem#2 prepareMEM::mem#5 prepareMEM::mem#2 prepareMEM::mem#3 prepareMEM::mem#4 prepareMEM::mem#9 prepareMEM::mem#1 mulFACbyMEM::mem#2 divMEMbyFAC::mem#2 ] ] with [ zp ZP_WORD:29 [ setFAC::w#5 setFAC::w#0 setFAC::w#3 setFAC::w#4 setFAC::w#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:65 [ gen_chargen_sprite::$0 ] ] with [ zp ZP_WORD:67 [ gen_chargen_sprite::$1 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:21 [ addMEMtoFAC::mem#2 prepareMEM::mem#5 prepareMEM::mem#2 prepareMEM::mem#3 prepareMEM::mem#4 prepareMEM::mem#9 prepareMEM::mem#1 mulFACbyMEM::mem#2 divMEMbyFAC::mem#2 setFAC::w#5 setFAC::w#0 setFAC::w#3 setFAC::w#4 setFAC::w#1 ] ] with [ zp ZP_WORD:31 [ setMEMtoFAC::mem#5 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:21 [ addMEMtoFAC::mem#2 prepareMEM::mem#5 prepareMEM::mem#2 prepareMEM::mem#3 prepareMEM::mem#4 prepareMEM::mem#9 prepareMEM::mem#1 ] ] with [ zp ZP_WORD:25 [ mulFACbyMEM::mem#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:55 [ getFAC::return#2 ] ] with [ zp ZP_WORD:57 [ gen_sintab::$23 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:21 [ addMEMtoFAC::mem#2 prepareMEM::mem#5 prepareMEM::mem#2 prepareMEM::mem#3 prepareMEM::mem#4 prepareMEM::mem#9 prepareMEM::mem#1 mulFACbyMEM::mem#2 ] ] with [ zp ZP_WORD:27 [ divMEMbyFAC::mem#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:55 [ getFAC::return#2 gen_sintab::$23 ] ] with [ zp ZP_WORD:60 [ getFAC::return#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:21 [ addMEMtoFAC::mem#2 prepareMEM::mem#5 prepareMEM::mem#2 prepareMEM::mem#3 prepareMEM::mem#4 prepareMEM::mem#9 prepareMEM::mem#1 mulFACbyMEM::mem#2 divMEMbyFAC::mem#2 ] ] with [ zp ZP_WORD:29 [ setFAC::w#5 setFAC::w#0 setFAC::w#3 setFAC::w#4 setFAC::w#1 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:65 [ gen_chargen_sprite::$0 ] ] with [ zp ZP_WORD:67 [ gen_chargen_sprite::$1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:21 [ addMEMtoFAC::mem#2 prepareMEM::mem#5 prepareMEM::mem#2 prepareMEM::mem#3 prepareMEM::mem#4 prepareMEM::mem#9 prepareMEM::mem#1 mulFACbyMEM::mem#2 divMEMbyFAC::mem#2 setFAC::w#5 setFAC::w#0 setFAC::w#3 setFAC::w#4 setFAC::w#1 ] ] with [ zp ZP_WORD:31 [ setMEMtoFAC::mem#5 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:65 [ gen_chargen_sprite::$0 gen_chargen_sprite::$1 ] ] with [ zp ZP_WORD:69 [ gen_chargen_sprite::chargen#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:65 [ gen_chargen_sprite::$0 gen_chargen_sprite::$1 ] ] with [ zp ZP_WORD:69 [ gen_chargen_sprite::chargen#0 ] ] - score: 1
 Coalescing zero page register [ zp ZP_BYTE:2 [ sin_idx_x#13 sin_idx_x#11 sin_idx_x#3 ] ] with [ zp ZP_BYTE:13 [ gen_sintab::min#2 ] ]
 Coalescing zero page register [ zp ZP_BYTE:2 [ sin_idx_x#13 sin_idx_x#11 sin_idx_x#3 gen_sintab::min#2 ] ] with [ zp ZP_BYTE:17 [ gen_sintab::i#10 gen_sintab::i#1 ] ]
 Coalescing zero page register [ zp ZP_BYTE:2 [ sin_idx_x#13 sin_idx_x#11 sin_idx_x#3 gen_sintab::min#2 gen_sintab::i#10 gen_sintab::i#1 ] ] with [ zp ZP_BYTE:33 [ gen_sprites::i#2 gen_sprites::i#1 ] ]

src/test/java/dk/camelot64/kickc/test/ref/sinusgen.asm

@@ -235,7 +235,7 @@ sin16s: {
     .label x1 = $1f
     .label x2 = 8
     .label x3 = 8
-    .label x3_6 = 6
+    .label x3_6 = $13
     .label usinx = 6
     .label x4 = 8
     .label x5 = 8
@@ -330,36 +330,32 @@ sin16s: {
     sta mul_u16_sel.v2+1
     ldx #0
     jsr mul_u16_sel
-    lda mul_u16_sel.return_14
+    lda mul_u16_sel.return
-    sta mul_u16_sel.return
+    sta x2
-    lda mul_u16_sel.return_14+1
+    lda mul_u16_sel.return+1
-    sta mul_u16_sel.return+1
+    sta x2+1
     lda x1
     sta mul_u16_sel.v2
     lda x1+1
     sta mul_u16_sel.v2+1
     ldx #1
     jsr mul_u16_sel
-    lda mul_u16_sel.return_14
+    lda mul_u16_sel.return
-    sta mul_u16_sel.return
+    sta mul_u16_sel.return_1
-    lda mul_u16_sel.return_14+1
+    lda mul_u16_sel.return+1
-    sta mul_u16_sel.return+1
+    sta mul_u16_sel.return_1+1
     ldx #1
     lda #<$10000/6
     sta mul_u16_sel.v2
     lda #>$10000/6
     sta mul_u16_sel.v2+1
     jsr mul_u16_sel
-    lda mul_u16_sel.return_14
-    sta mul_u16_sel.return_10
-    lda mul_u16_sel.return_14+1
-    sta mul_u16_sel.return_10+1
     lda x1
     sec
-    sbc usinx
+    sbc x3_6
     sta usinx
     lda x1+1
-    sbc usinx+1
+    sbc x3_6+1
     sta usinx+1
     lda x1
     sta mul_u16_sel.v2
@@ -367,20 +363,20 @@ sin16s: {
     sta mul_u16_sel.v2+1
     ldx #0
     jsr mul_u16_sel
-    lda mul_u16_sel.return_14
+    lda mul_u16_sel.return
-    sta mul_u16_sel.return
+    sta mul_u16_sel.return_11
-    lda mul_u16_sel.return_14+1
+    lda mul_u16_sel.return+1
-    sta mul_u16_sel.return+1
+    sta mul_u16_sel.return_11+1
     lda x1
     sta mul_u16_sel.v2
     lda x1+1
     sta mul_u16_sel.v2+1
     ldx #0
     jsr mul_u16_sel
-    lda mul_u16_sel.return_14
+    lda mul_u16_sel.return
-    sta mul_u16_sel.return
+    sta mul_u16_sel.return_12
-    lda mul_u16_sel.return_14+1
+    lda mul_u16_sel.return+1
-    sta mul_u16_sel.return+1
+    sta mul_u16_sel.return_12+1
     ldx #3
     lda #<$10000/$80
     sta mul_u16_sel.v2
@@ -413,10 +409,10 @@ mul_u16_sel: {
     .label _1 = $f
     .label v1 = 8
     .label v2 = $13
-    .label return = 8
+    .label return = $13
-    .label return_10 = 6
+    .label return_1 = 8
-    .label return_13 = $13
+    .label return_11 = 8
-    .label return_14 = $13
+    .label return_12 = 8
     lda v1
     sta mul16u.a
     lda v1+1
@@ -433,9 +429,9 @@ mul_u16_sel: {
     bne !-
   !e:
     lda _1+2
-    sta return_14
+    sta return
     lda _1+3
-    sta return_14+1
+    sta return+1
     rts
 }
 mul16u: {

src/test/java/dk/camelot64/kickc/test/ref/sinusgen.log

@@ -7006,51 +7006,51 @@ Uplifting [print_sword] best 24916 combination zp ZP_WORD:6 [ print_sword::w#3 p
 Uplifting [print_word] best 24916 combination 
 Attempting to uplift remaining variables inzp ZP_BYTE:22 [ sin16s::isUpper#10 ]
 Uplifting [sin16s] best 24916 combination zp ZP_BYTE:22 [ sin16s::isUpper#10 ] 
-Coalescing zero page register [ zp ZP_WORD:27 [ sin16s::return#1 sin16s::return#5 sin16s::sinx#1 ] ] with [ zp ZP_WORD:101 [ sin16s::usinx#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:27 [ sin16s::return#1 sin16s::return#5 sin16s::sinx#1 ] ] with [ zp ZP_WORD:101 [ sin16s::usinx#1 ] ] - score: 2
-Coalescing zero page register [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 ] ] with [ zp ZP_WORD:81 [ sin16s::x3#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 ] ] with [ zp ZP_WORD:81 [ sin16s::x3#0 ] ] - score: 2
-Coalescing zero page register [ zp ZP_WORD:46 [ divr16u::rem#5 divr16u::rem#10 divr16u::rem#4 divr16u::rem#11 divr16u::rem#6 divr16u::rem#0 divr16u::rem#1 divr16u::rem#2 ] ] with [ zp ZP_WORD:134 [ rem16u#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:46 [ divr16u::rem#5 divr16u::rem#10 divr16u::rem#4 divr16u::rem#11 divr16u::rem#6 divr16u::rem#0 divr16u::rem#1 divr16u::rem#2 ] ] with [ zp ZP_WORD:134 [ rem16u#1 ] ] - score: 2
-Coalescing zero page register [ zp ZP_WORD:6 [ print_sword::w#3 print_sword::w#1 print_sword::w#0 ] ] with [ zp ZP_WORD:53 [ main::sw#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:6 [ print_sword::w#3 print_sword::w#1 print_sword::w#0 ] ] with [ zp ZP_WORD:53 [ main::sw#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:23 [ sin16s::x#6 sin16s::x#4 sin16s::x#0 sin16s::x#1 sin16s::x#2 ] ] with [ zp ZP_DWORD:69 [ sin16s::$6 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:23 [ sin16s::x#6 sin16s::x#4 sin16s::x#0 sin16s::x#1 sin16s::x#2 ] ] with [ zp ZP_DWORD:69 [ sin16s::$6 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:27 [ sin16s::return#1 sin16s::return#5 sin16s::sinx#1 sin16s::usinx#1 ] ] with [ zp ZP_WORD:65 [ sin16s::return#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:27 [ sin16s::return#1 sin16s::return#5 sin16s::sinx#1 sin16s::usinx#1 ] ] with [ zp ZP_WORD:65 [ sin16s::return#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:27 [ sin16s::return#1 sin16s::return#5 sin16s::sinx#1 sin16s::usinx#1 sin16s::return#0 ] ] with [ zp ZP_WORD:67 [ sin16s_gen::$1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 ] ] with [ zp ZP_WORD:77 [ sin16s::x2#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:27 [ sin16s::return#1 sin16s::return#5 sin16s::sinx#1 sin16s::usinx#1 sin16s::return#0 sin16s_gen::$1 ] ] with [ zp ZP_WORD:87 [ sin16s::usinx#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 ] ] with [ zp ZP_WORD:91 [ sin16s::x4#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:27 [ sin16s::return#1 sin16s::return#5 sin16s::sinx#1 sin16s::usinx#1 sin16s::return#0 sin16s_gen::$1 sin16s::usinx#0 ] ] with [ zp ZP_WORD:85 [ sin16s::x3_6#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 sin16s::x4#0 ] ] with [ zp ZP_WORD:95 [ sin16s::x5#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:27 [ sin16s::return#1 sin16s::return#5 sin16s::sinx#1 sin16s::usinx#1 sin16s::return#0 sin16s_gen::$1 sin16s::usinx#0 sin16s::x3_6#0 ] ] with [ zp ZP_WORD:83 [ mul_u16_sel::return#10 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:31 [ mul_u16_sel::v2#6 mul_u16_sel::v2#3 mul_u16_sel::v2#4 mul_u16_sel::v2#0 mul_u16_sel::v2#1 ] ] with [ zp ZP_WORD:103 [ mul16u::b#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 ] ] with [ zp ZP_WORD:77 [ sin16s::x2#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:36 [ mul16u::res#2 mul16u::res#6 mul16u::res#1 ] ] with [ zp ZP_DWORD:105 [ mul16u::return#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 ] ] with [ zp ZP_WORD:75 [ mul_u16_sel::return#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:50 [ divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 ] ] with [ zp ZP_WORD:120 [ divr16u::return#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 mul_u16_sel::return#0 ] ] with [ zp ZP_WORD:79 [ mul_u16_sel::return#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:50 [ divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#2 ] ] with [ zp ZP_WORD:124 [ divr16u::return#3 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 mul_u16_sel::return#0 mul_u16_sel::return#1 ] ] with [ zp ZP_WORD:91 [ sin16s::x4#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:57 [ div32u16u::return#0 ] ] with [ zp ZP_DWORD:61 [ sin16s_gen::step#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 mul_u16_sel::return#0 mul_u16_sel::return#1 sin16s::x4#0 ] ] with [ zp ZP_WORD:89 [ mul_u16_sel::return#11 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:57 [ div32u16u::return#0 sin16s_gen::step#0 ] ] with [ zp ZP_DWORD:128 [ div32u16u::return#1 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 mul_u16_sel::return#0 mul_u16_sel::return#1 sin16s::x4#0 mul_u16_sel::return#11 ] ] with [ zp ZP_WORD:95 [ sin16s::x5#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:75 [ mul_u16_sel::return#0 ] ] with [ zp ZP_WORD:117 [ mul_u16_sel::return#14 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 mul_u16_sel::return#0 mul_u16_sel::return#1 sin16s::x4#0 mul_u16_sel::return#11 sin16s::x5#0 ] ] with [ zp ZP_WORD:93 [ mul_u16_sel::return#12 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:83 [ mul_u16_sel::return#10 ] ] with [ zp ZP_WORD:85 [ sin16s::x3_6#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:31 [ mul_u16_sel::v2#6 mul_u16_sel::v2#3 mul_u16_sel::v2#4 mul_u16_sel::v2#0 mul_u16_sel::v2#1 ] ] with [ zp ZP_WORD:103 [ mul16u::b#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:97 [ mul_u16_sel::return#13 ] ] with [ zp ZP_WORD:99 [ sin16s::x5_128#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:36 [ mul16u::res#2 mul16u::res#6 mul16u::res#1 ] ] with [ zp ZP_DWORD:105 [ mul16u::return#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:109 [ mul_u16_sel::$0 ] ] with [ zp ZP_DWORD:113 [ mul_u16_sel::$1 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:36 [ mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16u::return#2 ] ] with [ zp ZP_DWORD:109 [ mul_u16_sel::$0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:27 [ sin16s::return#1 sin16s::return#5 sin16s::sinx#1 sin16s::usinx#1 sin16s::return#0 ] ] with [ zp ZP_WORD:67 [ sin16s_gen::$1 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:36 [ mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16u::return#2 mul_u16_sel::$0 ] ] with [ zp ZP_DWORD:113 [ mul_u16_sel::$1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:27 [ sin16s::return#1 sin16s::return#5 sin16s::sinx#1 sin16s::usinx#1 sin16s::return#0 sin16s_gen::$1 ] ] with [ zp ZP_WORD:87 [ sin16s::usinx#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:50 [ divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 ] ] with [ zp ZP_WORD:120 [ divr16u::return#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 sin16s::x4#0 sin16s::x5#0 ] ] with [ zp ZP_WORD:79 [ mul_u16_sel::return#1 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:50 [ divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#2 ] ] with [ zp ZP_WORD:124 [ divr16u::return#3 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 sin16s::x4#0 sin16s::x5#0 mul_u16_sel::return#1 ] ] with [ zp ZP_WORD:89 [ mul_u16_sel::return#11 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:50 [ divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#2 divr16u::return#3 ] ] with [ zp ZP_WORD:126 [ div32u16u::quotient_lo#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 sin16s::x4#0 sin16s::x5#0 mul_u16_sel::return#1 mul_u16_sel::return#11 ] ] with [ zp ZP_WORD:93 [ mul_u16_sel::return#12 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:57 [ div32u16u::return#0 ] ] with [ zp ZP_DWORD:61 [ sin16s_gen::step#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:36 [ mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16u::return#2 ] ] with [ zp ZP_DWORD:109 [ mul_u16_sel::$0 mul_u16_sel::$1 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:57 [ div32u16u::return#0 sin16s_gen::step#0 ] ] with [ zp ZP_DWORD:128 [ div32u16u::return#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:50 [ divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#2 divr16u::return#3 ] ] with [ zp ZP_WORD:126 [ div32u16u::quotient_lo#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:97 [ mul_u16_sel::return#13 ] ] with [ zp ZP_WORD:99 [ sin16s::x5_128#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:75 [ mul_u16_sel::return#0 mul_u16_sel::return#14 ] ] with [ zp ZP_WORD:83 [ mul_u16_sel::return#10 sin16s::x3_6#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:97 [ mul_u16_sel::return#13 sin16s::x5_128#0 ] ] with [ zp ZP_WORD:117 [ mul_u16_sel::return#14 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:75 [ mul_u16_sel::return#0 mul_u16_sel::return#14 mul_u16_sel::return#10 sin16s::x3_6#0 ] ] with [ zp ZP_WORD:97 [ mul_u16_sel::return#13 sin16s::x5_128#0 ] ] - score: 1
 Coalescing zero page register [ zp ZP_WORD:2 [ main::st1#2 main::st1#1 ] ] with [ zp ZP_WORD:12 [ print_cls::sc#2 print_cls::sc#1 ] ]
 Coalescing zero page register [ zp ZP_WORD:2 [ main::st1#2 main::st1#1 print_cls::sc#2 print_cls::sc#1 ] ] with [ zp ZP_WORD:18 [ sin16s_gen::sintab#2 sin16s_gen::sintab#1 ] ]
 Coalescing zero page register [ zp ZP_WORD:2 [ main::st1#2 main::st1#1 print_cls::sc#2 print_cls::sc#1 sin16s_gen::sintab#2 sin16s_gen::sintab#1 ] ] with [ zp ZP_WORD:44 [ divr16u::divisor#6 ] ]
 Coalescing zero page register [ zp ZP_WORD:4 [ print_str::str#3 print_str::str#5 print_str::str#0 ] ] with [ zp ZP_WORD:20 [ sin16s_gen::i#2 sin16s_gen::i#1 ] ]
 Coalescing zero page register [ zp ZP_WORD:4 [ print_str::str#3 print_str::str#5 print_str::str#0 sin16s_gen::i#2 sin16s_gen::i#1 ] ] with [ zp ZP_WORD:46 [ divr16u::rem#5 divr16u::rem#10 divr16u::rem#4 divr16u::rem#11 divr16u::rem#6 divr16u::rem#0 divr16u::rem#1 divr16u::rem#2 rem16u#1 ] ]
-Coalescing zero page register [ zp ZP_WORD:6 [ print_sword::w#3 print_sword::w#1 print_sword::w#0 main::sw#0 ] ] with [ zp ZP_WORD:27 [ sin16s::return#1 sin16s::return#5 sin16s::sinx#1 sin16s::usinx#1 sin16s::return#0 sin16s_gen::$1 sin16s::usinx#0 sin16s::x3_6#0 mul_u16_sel::return#10 ] ]
+Coalescing zero page register [ zp ZP_WORD:6 [ print_sword::w#3 print_sword::w#1 print_sword::w#0 main::sw#0 ] ] with [ zp ZP_WORD:27 [ sin16s::return#1 sin16s::return#5 sin16s::sinx#1 sin16s::usinx#1 sin16s::return#0 sin16s_gen::$1 sin16s::usinx#0 ] ]
-Coalescing zero page register [ zp ZP_WORD:6 [ print_sword::w#3 print_sword::w#1 print_sword::w#0 main::sw#0 sin16s::return#1 sin16s::return#5 sin16s::sinx#1 sin16s::usinx#1 sin16s::return#0 sin16s_gen::$1 sin16s::usinx#0 sin16s::x3_6#0 mul_u16_sel::return#10 ] ] with [ zp ZP_WORD:48 [ divr16u::dividend#3 divr16u::dividend#5 divr16u::dividend#0 ] ]
+Coalescing zero page register [ zp ZP_WORD:6 [ print_sword::w#3 print_sword::w#1 print_sword::w#0 main::sw#0 sin16s::return#1 sin16s::return#5 sin16s::sinx#1 sin16s::usinx#1 sin16s::return#0 sin16s_gen::$1 sin16s::usinx#0 ] ] with [ zp ZP_WORD:48 [ divr16u::dividend#3 divr16u::dividend#5 divr16u::dividend#0 ] ]
-Coalescing zero page register [ zp ZP_WORD:10 [ char_cursor#33 char_cursor#46 char_cursor#43 char_cursor#51 char_cursor#48 char_cursor#49 char_cursor#2 char_cursor#12 char_cursor#1 ] ] with [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 mul_u16_sel::return#0 mul_u16_sel::return#1 sin16s::x4#0 mul_u16_sel::return#11 sin16s::x5#0 mul_u16_sel::return#12 ] ]
+Coalescing zero page register [ zp ZP_WORD:10 [ char_cursor#33 char_cursor#46 char_cursor#43 char_cursor#51 char_cursor#48 char_cursor#49 char_cursor#2 char_cursor#12 char_cursor#1 ] ] with [ zp ZP_WORD:29 [ mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 sin16s::x4#0 sin16s::x5#0 mul_u16_sel::return#1 mul_u16_sel::return#11 mul_u16_sel::return#12 ] ]
-Coalescing zero page register [ zp ZP_WORD:10 [ char_cursor#33 char_cursor#46 char_cursor#43 char_cursor#51 char_cursor#48 char_cursor#49 char_cursor#2 char_cursor#12 char_cursor#1 mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 mul_u16_sel::return#0 mul_u16_sel::return#1 sin16s::x4#0 mul_u16_sel::return#11 sin16s::x5#0 mul_u16_sel::return#12 ] ] with [ zp ZP_WORD:50 [ divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#2 divr16u::return#3 div32u16u::quotient_lo#0 ] ]
+Coalescing zero page register [ zp ZP_WORD:10 [ char_cursor#33 char_cursor#46 char_cursor#43 char_cursor#51 char_cursor#48 char_cursor#49 char_cursor#2 char_cursor#12 char_cursor#1 mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 sin16s::x4#0 sin16s::x5#0 mul_u16_sel::return#1 mul_u16_sel::return#11 mul_u16_sel::return#12 ] ] with [ zp ZP_WORD:50 [ divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#2 divr16u::return#3 div32u16u::quotient_lo#0 ] ]
 Coalescing zero page register [ zp ZP_DWORD:23 [ sin16s::x#6 sin16s::x#4 sin16s::x#0 sin16s::x#1 sin16s::x#2 sin16s::$6 ] ] with [ zp ZP_DWORD:36 [ mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16u::return#2 mul_u16_sel::$0 mul_u16_sel::$1 ] ]
-Coalescing zero page register [ zp ZP_WORD:31 [ mul_u16_sel::v2#6 mul_u16_sel::v2#3 mul_u16_sel::v2#4 mul_u16_sel::v2#0 mul_u16_sel::v2#1 mul16u::b#0 ] ] with [ zp ZP_WORD:97 [ mul_u16_sel::return#13 sin16s::x5_128#0 mul_u16_sel::return#14 ] ]
+Coalescing zero page register [ zp ZP_WORD:31 [ mul_u16_sel::v2#6 mul_u16_sel::v2#3 mul_u16_sel::v2#4 mul_u16_sel::v2#0 mul_u16_sel::v2#1 mul16u::b#0 ] ] with [ zp ZP_WORD:75 [ mul_u16_sel::return#0 mul_u16_sel::return#14 mul_u16_sel::return#10 sin16s::x3_6#0 mul_u16_sel::return#13 sin16s::x5_128#0 ] ]
-Coalescing zero page register [ zp ZP_WORD:31 [ mul_u16_sel::v2#6 mul_u16_sel::v2#3 mul_u16_sel::v2#4 mul_u16_sel::v2#0 mul_u16_sel::v2#1 mul16u::b#0 mul_u16_sel::return#13 sin16s::x5_128#0 mul_u16_sel::return#14 ] ] with [ zp ZP_WORD:122 [ div32u16u::quotient_hi#0 ] ]
+Coalescing zero page register [ zp ZP_WORD:31 [ mul_u16_sel::v2#6 mul_u16_sel::v2#3 mul_u16_sel::v2#4 mul_u16_sel::v2#0 mul_u16_sel::v2#1 mul16u::b#0 mul_u16_sel::return#0 mul_u16_sel::return#14 mul_u16_sel::return#10 sin16s::x3_6#0 mul_u16_sel::return#13 sin16s::x5_128#0 ] ] with [ zp ZP_WORD:122 [ div32u16u::quotient_hi#0 ] ]
-Allocated (was zp ZP_WORD:10) zp ZP_WORD:8 [ char_cursor#33 char_cursor#46 char_cursor#43 char_cursor#51 char_cursor#48 char_cursor#49 char_cursor#2 char_cursor#12 char_cursor#1 mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 mul_u16_sel::return#0 mul_u16_sel::return#1 sin16s::x4#0 mul_u16_sel::return#11 sin16s::x5#0 mul_u16_sel::return#12 divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#2 divr16u::return#3 div32u16u::quotient_lo#0 ]
+Allocated (was zp ZP_WORD:10) zp ZP_WORD:8 [ char_cursor#33 char_cursor#46 char_cursor#43 char_cursor#51 char_cursor#48 char_cursor#49 char_cursor#2 char_cursor#12 char_cursor#1 mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 sin16s::x4#0 sin16s::x5#0 mul_u16_sel::return#1 mul_u16_sel::return#11 mul_u16_sel::return#12 divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#2 divr16u::return#3 div32u16u::quotient_lo#0 ]
 Allocated (was zp ZP_DWORD:14) zp ZP_DWORD:10 [ sin16s_gen::x#2 sin16s_gen::x#1 ]
 Allocated (was zp ZP_BYTE:22) zp ZP_BYTE:14 [ sin16s::isUpper#10 ]
 Allocated (was zp ZP_DWORD:23) zp ZP_DWORD:15 [ sin16s::x#6 sin16s::x#4 sin16s::x#0 sin16s::x#1 sin16s::x#2 sin16s::$6 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16u::return#2 mul_u16_sel::$0 mul_u16_sel::$1 ]
-Allocated (was zp ZP_WORD:31) zp ZP_WORD:19 [ mul_u16_sel::v2#6 mul_u16_sel::v2#3 mul_u16_sel::v2#4 mul_u16_sel::v2#0 mul_u16_sel::v2#1 mul16u::b#0 mul_u16_sel::return#13 sin16s::x5_128#0 mul_u16_sel::return#14 div32u16u::quotient_hi#0 ]
+Allocated (was zp ZP_WORD:31) zp ZP_WORD:19 [ mul_u16_sel::v2#6 mul_u16_sel::v2#3 mul_u16_sel::v2#4 mul_u16_sel::v2#0 mul_u16_sel::v2#1 mul16u::b#0 mul_u16_sel::return#0 mul_u16_sel::return#14 mul_u16_sel::return#10 sin16s::x3_6#0 mul_u16_sel::return#13 sin16s::x5_128#0 div32u16u::quotient_hi#0 ]
 Allocated (was zp ZP_WORD:34) zp ZP_WORD:21 [ mul16u::a#2 mul16u::a#1 mul16u::a#0 ]
 Allocated (was zp ZP_DWORD:40) zp ZP_DWORD:23 [ mul16u::mb#2 mul16u::mb#0 mul16u::mb#1 ]
 Allocated (was zp ZP_DWORD:57) zp ZP_DWORD:27 [ div32u16u::return#0 sin16s_gen::step#0 div32u16u::return#1 ]
@@ -7533,7 +7533,7 @@ sin16s: {
     .label x1 = $1f
     .label x2 = 8
     .label x3 = 8
-    .label x3_6 = 6
+    .label x3_6 = $13
     .label usinx = 6
     .label x4 = 8
     .label x5 = 8
@@ -7663,16 +7663,16 @@ sin16s: {
   //SEG173 [116] phi (word) mul_u16_sel::v2#6 = (word) mul_u16_sel::v2#0 [phi:sin16s::@2->mul_u16_sel#1] -- register_copy 
   //SEG174 [116] phi (word) mul_u16_sel::v1#6 = (word) mul_u16_sel::v1#0 [phi:sin16s::@2->mul_u16_sel#2] -- register_copy 
     jsr mul_u16_sel
-  //SEG175 [84] (word) mul_u16_sel::return#0 ← (word) mul_u16_sel::return#14 [ sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#0 ] ) -- vwuz1=vwuz2 
+  //SEG175 [84] (word) mul_u16_sel::return#0 ← (word) mul_u16_sel::return#14 [ sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#0 ] )
-    lda mul_u16_sel.return_14
+    // (word) mul_u16_sel::return#0 = (word) mul_u16_sel::return#14  // register copy zp ZP_WORD:19
-    sta mul_u16_sel.return
-    lda mul_u16_sel.return_14+1
-    sta mul_u16_sel.return+1
     jmp b8
   //SEG176 sin16s::@8
   b8:
-  //SEG177 [85] (word) sin16s::x2#0 ← (word) mul_u16_sel::return#0 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::x2#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x2#0 ] )
+  //SEG177 [85] (word) sin16s::x2#0 ← (word) mul_u16_sel::return#0 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::x2#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x2#0 ] ) -- vwuz1=vwuz2 
-    // (word) sin16s::x2#0 = (word) mul_u16_sel::return#0  // register copy zp ZP_WORD:8
+    lda mul_u16_sel.return
+    sta x2
+    lda mul_u16_sel.return+1
+    sta x2+1
   //SEG178 [86] (word) mul_u16_sel::v1#1 ← (word) sin16s::x2#0 [ sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::v1#1 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::v1#1 ] )
     // (word) mul_u16_sel::v1#1 = (word) sin16s::x2#0  // register copy zp ZP_WORD:8
   //SEG179 [87] (word) mul_u16_sel::v2#1 ← (word) sin16s::x1#0 [ sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::v1#1 mul_u16_sel::v2#1 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::v1#1 mul_u16_sel::v2#1 ] ) -- vwuz1=vwuz2 
@@ -7689,10 +7689,10 @@ sin16s: {
   //SEG184 [116] phi (word) mul_u16_sel::v1#6 = (word) mul_u16_sel::v1#1 [phi:sin16s::@8->mul_u16_sel#2] -- register_copy 
     jsr mul_u16_sel
   //SEG185 [89] (word) mul_u16_sel::return#1 ← (word) mul_u16_sel::return#14 [ sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#1 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#1 ] ) -- vwuz1=vwuz2 
-    lda mul_u16_sel.return_14
+    lda mul_u16_sel.return
-    sta mul_u16_sel.return
+    sta mul_u16_sel.return_1
-    lda mul_u16_sel.return_14+1
+    lda mul_u16_sel.return+1
-    sta mul_u16_sel.return+1
+    sta mul_u16_sel.return_1+1
     jmp b9
   //SEG186 sin16s::@9
   b9:
@@ -7712,23 +7712,20 @@ sin16s: {
     sta mul_u16_sel.v2+1
   //SEG193 [116] phi (word) mul_u16_sel::v1#6 = (word) mul_u16_sel::v1#2 [phi:sin16s::@9->mul_u16_sel#2] -- register_copy 
     jsr mul_u16_sel
-  //SEG194 [93] (word) mul_u16_sel::return#10 ← (word) mul_u16_sel::return#14 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 mul_u16_sel::return#10 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 mul_u16_sel::return#10 ] ) -- vwuz1=vwuz2 
+  //SEG194 [93] (word) mul_u16_sel::return#10 ← (word) mul_u16_sel::return#14 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 mul_u16_sel::return#10 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 mul_u16_sel::return#10 ] )
-    lda mul_u16_sel.return_14
+    // (word) mul_u16_sel::return#10 = (word) mul_u16_sel::return#14  // register copy zp ZP_WORD:19
-    sta mul_u16_sel.return_10
-    lda mul_u16_sel.return_14+1
-    sta mul_u16_sel.return_10+1
     jmp b10
   //SEG195 sin16s::@10
   b10:
   //SEG196 [94] (word) sin16s::x3_6#0 ← (word) mul_u16_sel::return#10 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 sin16s::x3_6#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 sin16s::x3_6#0 ] )
-    // (word) sin16s::x3_6#0 = (word) mul_u16_sel::return#10  // register copy zp ZP_WORD:6
+    // (word) sin16s::x3_6#0 = (word) mul_u16_sel::return#10  // register copy zp ZP_WORD:19
-  //SEG197 [95] (word) sin16s::usinx#0 ← (word) sin16s::x1#0 - (word) sin16s::x3_6#0 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 sin16s::usinx#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 sin16s::usinx#0 ] ) -- vwuz1=vwuz2_minus_vwuz1 
+  //SEG197 [95] (word) sin16s::usinx#0 ← (word) sin16s::x1#0 - (word) sin16s::x3_6#0 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 sin16s::usinx#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 sin16s::usinx#0 ] ) -- vwuz1=vwuz2_minus_vwuz3 
     lda x1
     sec
-    sbc usinx
+    sbc x3_6
     sta usinx
     lda x1+1
-    sbc usinx+1
+    sbc x3_6+1
     sta usinx+1
   //SEG198 [96] (word) mul_u16_sel::v1#3 ← (word) sin16s::x3#0 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::usinx#0 mul_u16_sel::v1#3 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::usinx#0 mul_u16_sel::v1#3 ] )
     // (word) mul_u16_sel::v1#3 = (word) sin16s::x3#0  // register copy zp ZP_WORD:8
@@ -7746,10 +7743,10 @@ sin16s: {
   //SEG204 [116] phi (word) mul_u16_sel::v1#6 = (word) mul_u16_sel::v1#3 [phi:sin16s::@10->mul_u16_sel#2] -- register_copy 
     jsr mul_u16_sel
   //SEG205 [99] (word) mul_u16_sel::return#11 ← (word) mul_u16_sel::return#14 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::usinx#0 mul_u16_sel::return#11 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::usinx#0 mul_u16_sel::return#11 ] ) -- vwuz1=vwuz2 
-    lda mul_u16_sel.return_14
+    lda mul_u16_sel.return
-    sta mul_u16_sel.return
+    sta mul_u16_sel.return_11
-    lda mul_u16_sel.return_14+1
+    lda mul_u16_sel.return+1
-    sta mul_u16_sel.return+1
+    sta mul_u16_sel.return_11+1
     jmp b11
   //SEG206 sin16s::@11
   b11:
@@ -7771,10 +7768,10 @@ sin16s: {
   //SEG214 [116] phi (word) mul_u16_sel::v1#6 = (word) mul_u16_sel::v1#4 [phi:sin16s::@11->mul_u16_sel#2] -- register_copy 
     jsr mul_u16_sel
   //SEG215 [104] (word) mul_u16_sel::return#12 ← (word) mul_u16_sel::return#14 [ sin16s::isUpper#10 sin16s::usinx#0 mul_u16_sel::return#12 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::usinx#0 mul_u16_sel::return#12 ] ) -- vwuz1=vwuz2 
-    lda mul_u16_sel.return_14
+    lda mul_u16_sel.return
-    sta mul_u16_sel.return
+    sta mul_u16_sel.return_12
-    lda mul_u16_sel.return_14+1
+    lda mul_u16_sel.return+1
-    sta mul_u16_sel.return+1
+    sta mul_u16_sel.return_12+1
     jmp b12
   //SEG216 sin16s::@12
   b12:
@@ -7849,10 +7846,10 @@ mul_u16_sel: {
     .label _1 = $f
     .label v1 = 8
     .label v2 = $13
-    .label return = 8
+    .label return = $13
-    .label return_10 = 6
+    .label return_1 = 8
-    .label return_13 = $13
+    .label return_11 = 8
-    .label return_14 = $13
+    .label return_12 = 8
   //SEG239 [117] (word) mul16u::a#1 ← (word) mul_u16_sel::v1#6 [ mul_u16_sel::v2#6 mul_u16_sel::select#6 mul16u::a#1 ] ( main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:83 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::v2#6 mul_u16_sel::select#6 mul16u::a#1 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:88 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::v2#6 mul_u16_sel::select#6 mul16u::a#1 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:92 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 mul_u16_sel::v2#6 mul_u16_sel::select#6 mul16u::a#1 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:98 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::usinx#0 mul_u16_sel::v2#6 mul_u16_sel::select#6 mul16u::a#1 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:103 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::usinx#0 mul_u16_sel::v2#6 mul_u16_sel::select#6 mul16u::a#1 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:107 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::usinx#0 mul_u16_sel::v2#6 mul_u16_sel::select#6 mul16u::a#1 ] ) -- vwuz1=vwuz2 
     lda v1
     sta mul16u.a
@@ -7882,9 +7879,9 @@ mul_u16_sel: {
   !e:
   //SEG246 [123] (word) mul_u16_sel::return#14 ← > (dword~) mul_u16_sel::$1 [ mul_u16_sel::return#14 ] ( main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:83 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#14 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:88 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#14 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:92 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 mul_u16_sel::return#14 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:98 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::usinx#0 mul_u16_sel::return#14 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:103 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::usinx#0 mul_u16_sel::return#14 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:107 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::usinx#0 mul_u16_sel::return#14 ] ) -- vwuz1=_hi_vduz2 
     lda _1+2
-    sta return_14
+    sta return
     lda _1+3
-    sta return_14+1
+    sta return+1
     jmp breturn
   //SEG247 mul_u16_sel::@return
   breturn:
@@ -8478,13 +8475,13 @@ FINAL SYMBOL TABLE
 (label) mul_u16_sel::@2
 (label) mul_u16_sel::@return
 (word) mul_u16_sel::return
-(word) mul_u16_sel::return#0 return zp ZP_WORD:8 4.0
+(word) mul_u16_sel::return#0 return zp ZP_WORD:19 4.0
-(word) mul_u16_sel::return#1 return zp ZP_WORD:8 4.0
+(word) mul_u16_sel::return#1 return#1 zp ZP_WORD:8 4.0
-(word) mul_u16_sel::return#10 return#10 zp ZP_WORD:6 4.0
+(word) mul_u16_sel::return#10 return zp ZP_WORD:19 4.0
-(word) mul_u16_sel::return#11 return zp ZP_WORD:8 4.0
+(word) mul_u16_sel::return#11 return#11 zp ZP_WORD:8 4.0
-(word) mul_u16_sel::return#12 return zp ZP_WORD:8 4.0
+(word) mul_u16_sel::return#12 return#12 zp ZP_WORD:8 4.0
-(word) mul_u16_sel::return#13 return#13 zp ZP_WORD:19 4.0
+(word) mul_u16_sel::return#13 return zp ZP_WORD:19 4.0
-(word) mul_u16_sel::return#14 return#14 zp ZP_WORD:19 1.75
+(word) mul_u16_sel::return#14 return zp ZP_WORD:19 1.75
 (byte) mul_u16_sel::select
 (byte) mul_u16_sel::select#6 reg byte x 0.3333333333333333
 (word) mul_u16_sel::v1
@@ -8587,7 +8584,7 @@ FINAL SYMBOL TABLE
 (word) sin16s::x3
 (word) sin16s::x3#0 x3 zp ZP_WORD:8 1.0
 (word) sin16s::x3_6
-(word) sin16s::x3_6#0 x3_6 zp ZP_WORD:6 4.0
+(word) sin16s::x3_6#0 x3_6 zp ZP_WORD:19 4.0
 (word) sin16s::x4
 (word) sin16s::x4#0 x4 zp ZP_WORD:8 4.0
 (word) sin16s::x5
@@ -8615,14 +8612,14 @@ FINAL SYMBOL TABLE
 
 zp ZP_WORD:2 [ main::st1#2 main::st1#1 print_cls::sc#2 print_cls::sc#1 sin16s_gen::sintab#2 sin16s_gen::sintab#1 divr16u::divisor#6 ]
 zp ZP_WORD:4 [ print_str::str#3 print_str::str#5 print_str::str#0 sin16s_gen::i#2 sin16s_gen::i#1 divr16u::rem#5 divr16u::rem#10 divr16u::rem#4 divr16u::rem#11 divr16u::rem#6 divr16u::rem#0 divr16u::rem#1 divr16u::rem#2 rem16u#1 ]
-zp ZP_WORD:6 [ print_sword::w#3 print_sword::w#1 print_sword::w#0 main::sw#0 sin16s::return#1 sin16s::return#5 sin16s::sinx#1 sin16s::usinx#1 sin16s::return#0 sin16s_gen::$1 sin16s::usinx#0 sin16s::x3_6#0 mul_u16_sel::return#10 divr16u::dividend#3 divr16u::dividend#5 divr16u::dividend#0 ]
+zp ZP_WORD:6 [ print_sword::w#3 print_sword::w#1 print_sword::w#0 main::sw#0 sin16s::return#1 sin16s::return#5 sin16s::sinx#1 sin16s::usinx#1 sin16s::return#0 sin16s_gen::$1 sin16s::usinx#0 divr16u::dividend#3 divr16u::dividend#5 divr16u::dividend#0 ]
 reg byte x [ print_byte::b#2 print_byte::b#0 print_byte::b#1 ]
 reg byte a [ print_char::ch#3 print_char::ch#1 print_char::ch#2 ]
-zp ZP_WORD:8 [ char_cursor#33 char_cursor#46 char_cursor#43 char_cursor#51 char_cursor#48 char_cursor#49 char_cursor#2 char_cursor#12 char_cursor#1 mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 mul_u16_sel::return#0 mul_u16_sel::return#1 sin16s::x4#0 mul_u16_sel::return#11 sin16s::x5#0 mul_u16_sel::return#12 divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#2 divr16u::return#3 div32u16u::quotient_lo#0 ]
+zp ZP_WORD:8 [ char_cursor#33 char_cursor#46 char_cursor#43 char_cursor#51 char_cursor#48 char_cursor#49 char_cursor#2 char_cursor#12 char_cursor#1 mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 sin16s::x4#0 sin16s::x5#0 mul_u16_sel::return#1 mul_u16_sel::return#11 mul_u16_sel::return#12 divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#2 divr16u::return#3 div32u16u::quotient_lo#0 ]
 zp ZP_DWORD:10 [ sin16s_gen::x#2 sin16s_gen::x#1 ]
 zp ZP_BYTE:14 [ sin16s::isUpper#10 ]
 zp ZP_DWORD:15 [ sin16s::x#6 sin16s::x#4 sin16s::x#0 sin16s::x#1 sin16s::x#2 sin16s::$6 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16u::return#2 mul_u16_sel::$0 mul_u16_sel::$1 ]
-zp ZP_WORD:19 [ mul_u16_sel::v2#6 mul_u16_sel::v2#3 mul_u16_sel::v2#4 mul_u16_sel::v2#0 mul_u16_sel::v2#1 mul16u::b#0 mul_u16_sel::return#13 sin16s::x5_128#0 mul_u16_sel::return#14 div32u16u::quotient_hi#0 ]
+zp ZP_WORD:19 [ mul_u16_sel::v2#6 mul_u16_sel::v2#3 mul_u16_sel::v2#4 mul_u16_sel::v2#0 mul_u16_sel::v2#1 mul16u::b#0 mul_u16_sel::return#0 mul_u16_sel::return#14 mul_u16_sel::return#10 sin16s::x3_6#0 mul_u16_sel::return#13 sin16s::x5_128#0 div32u16u::quotient_hi#0 ]
 reg byte x [ mul_u16_sel::select#6 ]
 zp ZP_WORD:21 [ mul16u::a#2 mul16u::a#1 mul16u::a#0 ]
 zp ZP_DWORD:23 [ mul16u::mb#2 mul16u::mb#0 mul16u::mb#1 ]
@@ -8637,7 +8634,7 @@ reg byte a [ divr16u::$2 ]
 
 
 FINAL ASSEMBLER
-Score: 20933
+Score: 20921
 
 //SEG0 Basic Upstart
 .pc = $801 "Basic"
@@ -9031,7 +9028,7 @@ sin16s: {
     .label x1 = $1f
     .label x2 = 8
     .label x3 = 8
-    .label x3_6 = 6
+    .label x3_6 = $13
     .label usinx = 6
     .label x4 = 8
     .label x5 = 8
@@ -9151,14 +9148,14 @@ sin16s: {
   //SEG173 [116] phi (word) mul_u16_sel::v2#6 = (word) mul_u16_sel::v2#0 [phi:sin16s::@2->mul_u16_sel#1] -- register_copy 
   //SEG174 [116] phi (word) mul_u16_sel::v1#6 = (word) mul_u16_sel::v1#0 [phi:sin16s::@2->mul_u16_sel#2] -- register_copy 
     jsr mul_u16_sel
-  //SEG175 [84] (word) mul_u16_sel::return#0 ← (word) mul_u16_sel::return#14 [ sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#0 ] ) -- vwuz1=vwuz2 
+  //SEG175 [84] (word) mul_u16_sel::return#0 ← (word) mul_u16_sel::return#14 [ sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#0 ] )
-    lda mul_u16_sel.return_14
+    // (word) mul_u16_sel::return#0 = (word) mul_u16_sel::return#14  // register copy zp ZP_WORD:19
-    sta mul_u16_sel.return
-    lda mul_u16_sel.return_14+1
-    sta mul_u16_sel.return+1
   //SEG176 sin16s::@8
-  //SEG177 [85] (word) sin16s::x2#0 ← (word) mul_u16_sel::return#0 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::x2#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x2#0 ] )
+  //SEG177 [85] (word) sin16s::x2#0 ← (word) mul_u16_sel::return#0 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::x2#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x2#0 ] ) -- vwuz1=vwuz2 
-    // (word) sin16s::x2#0 = (word) mul_u16_sel::return#0  // register copy zp ZP_WORD:8
+    lda mul_u16_sel.return
+    sta x2
+    lda mul_u16_sel.return+1
+    sta x2+1
   //SEG178 [86] (word) mul_u16_sel::v1#1 ← (word) sin16s::x2#0 [ sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::v1#1 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::v1#1 ] )
     // (word) mul_u16_sel::v1#1 = (word) sin16s::x2#0  // register copy zp ZP_WORD:8
   //SEG179 [87] (word) mul_u16_sel::v2#1 ← (word) sin16s::x1#0 [ sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::v1#1 mul_u16_sel::v2#1 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::v1#1 mul_u16_sel::v2#1 ] ) -- vwuz1=vwuz2 
@@ -9174,10 +9171,10 @@ sin16s: {
   //SEG184 [116] phi (word) mul_u16_sel::v1#6 = (word) mul_u16_sel::v1#1 [phi:sin16s::@8->mul_u16_sel#2] -- register_copy 
     jsr mul_u16_sel
   //SEG185 [89] (word) mul_u16_sel::return#1 ← (word) mul_u16_sel::return#14 [ sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#1 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#1 ] ) -- vwuz1=vwuz2 
-    lda mul_u16_sel.return_14
+    lda mul_u16_sel.return
-    sta mul_u16_sel.return
+    sta mul_u16_sel.return_1
-    lda mul_u16_sel.return_14+1
+    lda mul_u16_sel.return+1
-    sta mul_u16_sel.return+1
+    sta mul_u16_sel.return_1+1
   //SEG186 sin16s::@9
   //SEG187 [90] (word) sin16s::x3#0 ← (word) mul_u16_sel::return#1 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 ] )
     // (word) sin16s::x3#0 = (word) mul_u16_sel::return#1  // register copy zp ZP_WORD:8
@@ -9194,21 +9191,18 @@ sin16s: {
     sta mul_u16_sel.v2+1
   //SEG193 [116] phi (word) mul_u16_sel::v1#6 = (word) mul_u16_sel::v1#2 [phi:sin16s::@9->mul_u16_sel#2] -- register_copy 
     jsr mul_u16_sel
-  //SEG194 [93] (word) mul_u16_sel::return#10 ← (word) mul_u16_sel::return#14 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 mul_u16_sel::return#10 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 mul_u16_sel::return#10 ] ) -- vwuz1=vwuz2 
+  //SEG194 [93] (word) mul_u16_sel::return#10 ← (word) mul_u16_sel::return#14 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 mul_u16_sel::return#10 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 mul_u16_sel::return#10 ] )
-    lda mul_u16_sel.return_14
+    // (word) mul_u16_sel::return#10 = (word) mul_u16_sel::return#14  // register copy zp ZP_WORD:19
-    sta mul_u16_sel.return_10
-    lda mul_u16_sel.return_14+1
-    sta mul_u16_sel.return_10+1
   //SEG195 sin16s::@10
   //SEG196 [94] (word) sin16s::x3_6#0 ← (word) mul_u16_sel::return#10 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 sin16s::x3_6#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 sin16s::x3_6#0 ] )
-    // (word) sin16s::x3_6#0 = (word) mul_u16_sel::return#10  // register copy zp ZP_WORD:6
+    // (word) sin16s::x3_6#0 = (word) mul_u16_sel::return#10  // register copy zp ZP_WORD:19
-  //SEG197 [95] (word) sin16s::usinx#0 ← (word) sin16s::x1#0 - (word) sin16s::x3_6#0 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 sin16s::usinx#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 sin16s::usinx#0 ] ) -- vwuz1=vwuz2_minus_vwuz1 
+  //SEG197 [95] (word) sin16s::usinx#0 ← (word) sin16s::x1#0 - (word) sin16s::x3_6#0 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 sin16s::usinx#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 sin16s::usinx#0 ] ) -- vwuz1=vwuz2_minus_vwuz3 
     lda x1
     sec
-    sbc usinx
+    sbc x3_6
     sta usinx
     lda x1+1
-    sbc usinx+1
+    sbc x3_6+1
     sta usinx+1
   //SEG198 [96] (word) mul_u16_sel::v1#3 ← (word) sin16s::x3#0 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::usinx#0 mul_u16_sel::v1#3 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::usinx#0 mul_u16_sel::v1#3 ] )
     // (word) mul_u16_sel::v1#3 = (word) sin16s::x3#0  // register copy zp ZP_WORD:8
@@ -9225,10 +9219,10 @@ sin16s: {
   //SEG204 [116] phi (word) mul_u16_sel::v1#6 = (word) mul_u16_sel::v1#3 [phi:sin16s::@10->mul_u16_sel#2] -- register_copy 
     jsr mul_u16_sel
   //SEG205 [99] (word) mul_u16_sel::return#11 ← (word) mul_u16_sel::return#14 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::usinx#0 mul_u16_sel::return#11 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::usinx#0 mul_u16_sel::return#11 ] ) -- vwuz1=vwuz2 
-    lda mul_u16_sel.return_14
+    lda mul_u16_sel.return
-    sta mul_u16_sel.return
+    sta mul_u16_sel.return_11
-    lda mul_u16_sel.return_14+1
+    lda mul_u16_sel.return+1
-    sta mul_u16_sel.return+1
+    sta mul_u16_sel.return_11+1
   //SEG206 sin16s::@11
   //SEG207 [100] (word) sin16s::x4#0 ← (word) mul_u16_sel::return#11 [ sin16s::isUpper#10 sin16s::x1#0 sin16s::usinx#0 sin16s::x4#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::usinx#0 sin16s::x4#0 ] )
     // (word) sin16s::x4#0 = (word) mul_u16_sel::return#11  // register copy zp ZP_WORD:8
@@ -9247,10 +9241,10 @@ sin16s: {
   //SEG214 [116] phi (word) mul_u16_sel::v1#6 = (word) mul_u16_sel::v1#4 [phi:sin16s::@11->mul_u16_sel#2] -- register_copy 
     jsr mul_u16_sel
   //SEG215 [104] (word) mul_u16_sel::return#12 ← (word) mul_u16_sel::return#14 [ sin16s::isUpper#10 sin16s::usinx#0 mul_u16_sel::return#12 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::usinx#0 mul_u16_sel::return#12 ] ) -- vwuz1=vwuz2 
-    lda mul_u16_sel.return_14
+    lda mul_u16_sel.return
-    sta mul_u16_sel.return
+    sta mul_u16_sel.return_12
-    lda mul_u16_sel.return_14+1
+    lda mul_u16_sel.return+1
-    sta mul_u16_sel.return+1
+    sta mul_u16_sel.return_12+1
   //SEG216 sin16s::@12
   //SEG217 [105] (word) sin16s::x5#0 ← (word) mul_u16_sel::return#12 [ sin16s::isUpper#10 sin16s::usinx#0 sin16s::x5#0 ] ( main:2::sin16s_gen:5::sin16s:64 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::usinx#0 sin16s::x5#0 ] )
     // (word) sin16s::x5#0 = (word) mul_u16_sel::return#12  // register copy zp ZP_WORD:8
@@ -9311,10 +9305,10 @@ mul_u16_sel: {
     .label _1 = $f
     .label v1 = 8
     .label v2 = $13
-    .label return = 8
+    .label return = $13
-    .label return_10 = 6
+    .label return_1 = 8
-    .label return_13 = $13
+    .label return_11 = 8
-    .label return_14 = $13
+    .label return_12 = 8
   //SEG239 [117] (word) mul16u::a#1 ← (word) mul_u16_sel::v1#6 [ mul_u16_sel::v2#6 mul_u16_sel::select#6 mul16u::a#1 ] ( main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:83 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::v2#6 mul_u16_sel::select#6 mul16u::a#1 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:88 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::v2#6 mul_u16_sel::select#6 mul16u::a#1 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:92 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 mul_u16_sel::v2#6 mul_u16_sel::select#6 mul16u::a#1 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:98 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::usinx#0 mul_u16_sel::v2#6 mul_u16_sel::select#6 mul16u::a#1 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:103 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::usinx#0 mul_u16_sel::v2#6 mul_u16_sel::select#6 mul16u::a#1 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:107 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::usinx#0 mul_u16_sel::v2#6 mul_u16_sel::select#6 mul16u::a#1 ] ) -- vwuz1=vwuz2 
     lda v1
     sta mul16u.a
@@ -9342,9 +9336,9 @@ mul_u16_sel: {
   !e:
   //SEG246 [123] (word) mul_u16_sel::return#14 ← > (dword~) mul_u16_sel::$1 [ mul_u16_sel::return#14 ] ( main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:83 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#14 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:88 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#14 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:92 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 mul_u16_sel::return#14 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:98 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::usinx#0 mul_u16_sel::return#14 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:103 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::usinx#0 mul_u16_sel::return#14 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:107 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::usinx#0 mul_u16_sel::return#14 ] ) -- vwuz1=_hi_vduz2 
     lda _1+2
-    sta return_14
+    sta return
     lda _1+3
-    sta return_14+1
+    sta return+1
   //SEG247 mul_u16_sel::@return
   //SEG248 [124] return  [ mul_u16_sel::return#14 ] ( main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:83 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#14 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:88 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 mul_u16_sel::return#14 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:92 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::x3#0 mul_u16_sel::return#14 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:98 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::x1#0 sin16s::usinx#0 mul_u16_sel::return#14 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:103 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::usinx#0 mul_u16_sel::return#14 ] main:2::sin16s_gen:5::sin16s:64::mul_u16_sel:107 [ sin16s_gen::step#0 sin16s_gen::x#2 sin16s_gen::sintab#2 sin16s_gen::i#2 sin16s::isUpper#10 sin16s::usinx#0 mul_u16_sel::return#14 ] )
     rts

src/test/java/dk/camelot64/kickc/test/ref/sinusgen.sym

@@ -118,13 +118,13 @@
 (label) mul_u16_sel::@2
 (label) mul_u16_sel::@return
 (word) mul_u16_sel::return
-(word) mul_u16_sel::return#0 return zp ZP_WORD:8 4.0
+(word) mul_u16_sel::return#0 return zp ZP_WORD:19 4.0
-(word) mul_u16_sel::return#1 return zp ZP_WORD:8 4.0
+(word) mul_u16_sel::return#1 return#1 zp ZP_WORD:8 4.0
-(word) mul_u16_sel::return#10 return#10 zp ZP_WORD:6 4.0
+(word) mul_u16_sel::return#10 return zp ZP_WORD:19 4.0
-(word) mul_u16_sel::return#11 return zp ZP_WORD:8 4.0
+(word) mul_u16_sel::return#11 return#11 zp ZP_WORD:8 4.0
-(word) mul_u16_sel::return#12 return zp ZP_WORD:8 4.0
+(word) mul_u16_sel::return#12 return#12 zp ZP_WORD:8 4.0
-(word) mul_u16_sel::return#13 return#13 zp ZP_WORD:19 4.0
+(word) mul_u16_sel::return#13 return zp ZP_WORD:19 4.0
-(word) mul_u16_sel::return#14 return#14 zp ZP_WORD:19 1.75
+(word) mul_u16_sel::return#14 return zp ZP_WORD:19 1.75
 (byte) mul_u16_sel::select
 (byte) mul_u16_sel::select#6 reg byte x 0.3333333333333333
 (word) mul_u16_sel::v1
@@ -227,7 +227,7 @@
 (word) sin16s::x3
 (word) sin16s::x3#0 x3 zp ZP_WORD:8 1.0
 (word) sin16s::x3_6
-(word) sin16s::x3_6#0 x3_6 zp ZP_WORD:6 4.0
+(word) sin16s::x3_6#0 x3_6 zp ZP_WORD:19 4.0
 (word) sin16s::x4
 (word) sin16s::x4#0 x4 zp ZP_WORD:8 4.0
 (word) sin16s::x5
@@ -255,14 +255,14 @@
 
 zp ZP_WORD:2 [ main::st1#2 main::st1#1 print_cls::sc#2 print_cls::sc#1 sin16s_gen::sintab#2 sin16s_gen::sintab#1 divr16u::divisor#6 ]
 zp ZP_WORD:4 [ print_str::str#3 print_str::str#5 print_str::str#0 sin16s_gen::i#2 sin16s_gen::i#1 divr16u::rem#5 divr16u::rem#10 divr16u::rem#4 divr16u::rem#11 divr16u::rem#6 divr16u::rem#0 divr16u::rem#1 divr16u::rem#2 rem16u#1 ]
-zp ZP_WORD:6 [ print_sword::w#3 print_sword::w#1 print_sword::w#0 main::sw#0 sin16s::return#1 sin16s::return#5 sin16s::sinx#1 sin16s::usinx#1 sin16s::return#0 sin16s_gen::$1 sin16s::usinx#0 sin16s::x3_6#0 mul_u16_sel::return#10 divr16u::dividend#3 divr16u::dividend#5 divr16u::dividend#0 ]
+zp ZP_WORD:6 [ print_sword::w#3 print_sword::w#1 print_sword::w#0 main::sw#0 sin16s::return#1 sin16s::return#5 sin16s::sinx#1 sin16s::usinx#1 sin16s::return#0 sin16s_gen::$1 sin16s::usinx#0 divr16u::dividend#3 divr16u::dividend#5 divr16u::dividend#0 ]
 reg byte x [ print_byte::b#2 print_byte::b#0 print_byte::b#1 ]
 reg byte a [ print_char::ch#3 print_char::ch#1 print_char::ch#2 ]
-zp ZP_WORD:8 [ char_cursor#33 char_cursor#46 char_cursor#43 char_cursor#51 char_cursor#48 char_cursor#49 char_cursor#2 char_cursor#12 char_cursor#1 mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 mul_u16_sel::return#0 mul_u16_sel::return#1 sin16s::x4#0 mul_u16_sel::return#11 sin16s::x5#0 mul_u16_sel::return#12 divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#2 divr16u::return#3 div32u16u::quotient_lo#0 ]
+zp ZP_WORD:8 [ char_cursor#33 char_cursor#46 char_cursor#43 char_cursor#51 char_cursor#48 char_cursor#49 char_cursor#2 char_cursor#12 char_cursor#1 mul_u16_sel::v1#6 mul_u16_sel::v1#3 mul_u16_sel::v1#4 mul_u16_sel::v1#5 mul_u16_sel::v1#0 mul_u16_sel::v1#1 mul_u16_sel::v1#2 sin16s::x3#0 sin16s::x2#0 sin16s::x4#0 sin16s::x5#0 mul_u16_sel::return#1 mul_u16_sel::return#11 mul_u16_sel::return#12 divr16u::quotient#3 divr16u::return#0 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#2 divr16u::return#3 div32u16u::quotient_lo#0 ]
 zp ZP_DWORD:10 [ sin16s_gen::x#2 sin16s_gen::x#1 ]
 zp ZP_BYTE:14 [ sin16s::isUpper#10 ]
 zp ZP_DWORD:15 [ sin16s::x#6 sin16s::x#4 sin16s::x#0 sin16s::x#1 sin16s::x#2 sin16s::$6 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16u::return#2 mul_u16_sel::$0 mul_u16_sel::$1 ]
-zp ZP_WORD:19 [ mul_u16_sel::v2#6 mul_u16_sel::v2#3 mul_u16_sel::v2#4 mul_u16_sel::v2#0 mul_u16_sel::v2#1 mul16u::b#0 mul_u16_sel::return#13 sin16s::x5_128#0 mul_u16_sel::return#14 div32u16u::quotient_hi#0 ]
+zp ZP_WORD:19 [ mul_u16_sel::v2#6 mul_u16_sel::v2#3 mul_u16_sel::v2#4 mul_u16_sel::v2#0 mul_u16_sel::v2#1 mul16u::b#0 mul_u16_sel::return#0 mul_u16_sel::return#14 mul_u16_sel::return#10 sin16s::x3_6#0 mul_u16_sel::return#13 sin16s::x5_128#0 div32u16u::quotient_hi#0 ]
 reg byte x [ mul_u16_sel::select#6 ]
 zp ZP_WORD:21 [ mul16u::a#2 mul16u::a#1 mul16u::a#0 ]
 zp ZP_DWORD:23 [ mul16u::mb#2 mul16u::mb#0 mul16u::mb#1 ]

src/test/java/dk/camelot64/kickc/test/ref/test-comparisons.log

@@ -8984,8 +8984,8 @@ Attempting to uplift remaining variables inzp ZP_BYTE:23 [ main::r#59 ]
 Uplifting [main] best 20013 combination reg byte x [ main::r#59 ] 
 Attempting to uplift remaining variables inzp ZP_BYTE:39 [ main::b#0 ]
 Uplifting [main] best 20013 combination zp ZP_BYTE:39 [ main::b#0 ] 
-Coalescing zero page register [ zp ZP_BYTE:2 [ main::a#10 main::a#1 ] ] with [ zp ZP_BYTE:26 [ printu::a#20 printu::a#8 printu::a#9 printu::a#10 printu::a#11 printu::a#12 printu::a#13 printu::a#14 printu::a#15 printu::a#16 printu::a#17 printu::a#0 printu::a#18 printu::a#19 printu::a#1 printu::a#2 printu::a#3 printu::a#4 printu::a#5 printu::a#6 printu::a#7 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:2 [ main::a#10 main::a#1 ] ] with [ zp ZP_BYTE:26 [ printu::a#20 printu::a#8 printu::a#9 printu::a#10 printu::a#11 printu::a#12 printu::a#13 printu::a#14 printu::a#15 printu::a#16 printu::a#17 printu::a#0 printu::a#18 printu::a#19 printu::a#1 printu::a#2 printu::a#3 printu::a#4 printu::a#5 printu::a#6 printu::a#7 ] ] - score: 20
-Coalescing zero page register [ zp ZP_WORD:27 [ printu::op#20 ] ] with [ zp ZP_WORD:35 [ print_str::str#2 print_str::str#1 print_str::str#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:27 [ printu::op#20 ] ] with [ zp ZP_WORD:35 [ print_str::str#2 print_str::str#1 print_str::str#0 ] ] - score: 1
 Coalescing zero page register [ zp ZP_WORD:24 [ line_cursor#13 line_cursor#25 line_cursor#27 line_cursor#1 ] ] with [ zp ZP_WORD:37 [ print_cls::sc#2 print_cls::sc#1 ] ]
 Allocated (was zp ZP_WORD:24) zp ZP_WORD:4 [ line_cursor#13 line_cursor#25 line_cursor#27 line_cursor#1 print_cls::sc#2 print_cls::sc#1 ]
 Allocated (was zp ZP_WORD:27) zp ZP_WORD:6 [ printu::op#20 print_str::str#2 print_str::str#1 print_str::str#0 ]

src/test/java/dk/camelot64/kickc/test/ref/test-division.asm

@@ -35,6 +35,10 @@ test_16s: {
     sta divisor
     lda divisors+1,y
     sta divisor+1
+    lda dividend
+    sta div16s.dividend
+    lda dividend+1
+    sta div16s.dividend+1
     lda divisor
     sta div16s.divisor
     lda divisor+1
@@ -193,18 +197,18 @@ div16s: {
     .label _7 = $c
     .label resultu = $e
     .label return = $e
-    .label dividend = 7
+    .label dividend = 3
     .label divisor = $c
     .label dividendu = 3
     .label divisoru = $c
     lda dividend+1
     bpl b16
     sec
-    lda dividend
+    lda _2
     eor #$ff
     adc #0
     sta _2
-    lda dividend+1
+    lda _2+1
     eor #$ff
     adc #0
     sta _2+1
@@ -255,10 +259,6 @@ div16s: {
     sta return+1
     jmp breturn
   b16:
-    lda dividend
-    sta dividendu
-    lda dividend+1
-    sta dividendu+1
     ldy #0
     jmp b2
 }

src/test/java/dk/camelot64/kickc/test/ref/test-division.log

@@ -9174,42 +9174,42 @@ Attempting to uplift remaining variables inzp ZP_BYTE:89 [ div8s::$7 ]
 Uplifting [div8s] best 42767 combination reg byte x [ div8s::$7 ] 
 Attempting to uplift remaining variables inzp ZP_BYTE:91 [ div8s::resultu#0 ]
 Uplifting [div8s] best 42766 combination reg byte y [ div8s::resultu#0 ] 
-Coalescing zero page register [ zp ZP_WORD:22 [ div16s::return#2 div16s::return#6 div16s::return#0 ] ] with [ zp ZP_WORD:72 [ div16s::resultu#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:22 [ div16s::return#2 div16s::return#6 div16s::return#0 ] ] with [ zp ZP_WORD:72 [ div16s::resultu#0 ] ] - score: 2
-Coalescing zero page register [ zp ZP_WORD:7 [ print_sword::w#6 print_sword::w#5 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#4 print_sword::w#0 ] ] with [ zp ZP_WORD:9 [ print_word::w#5 print_word::w#7 print_word::w#1 print_word::w#2 print_word::w#3 print_word::w#4 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:7 [ print_sword::w#6 print_sword::w#5 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#4 print_sword::w#0 ] ] with [ zp ZP_WORD:9 [ print_word::w#5 print_word::w#7 print_word::w#1 print_word::w#2 print_word::w#3 print_word::w#4 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:7 [ print_sword::w#6 print_sword::w#5 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#4 print_sword::w#0 print_word::w#5 print_word::w#7 print_word::w#1 print_word::w#2 print_word::w#3 print_word::w#4 ] ] with [ zp ZP_WORD:52 [ test_16s::dividend#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:7 [ print_sword::w#6 print_sword::w#5 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#4 print_sword::w#0 print_word::w#5 print_word::w#7 print_word::w#1 print_word::w#2 print_word::w#3 print_word::w#4 ] ] with [ zp ZP_WORD:52 [ test_16s::dividend#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:7 [ print_sword::w#6 print_sword::w#5 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#4 print_sword::w#0 print_word::w#5 print_word::w#7 print_word::w#1 print_word::w#2 print_word::w#3 print_word::w#4 test_16s::dividend#0 ] ] with [ zp ZP_WORD:56 [ div16s::dividend#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:11 [ print_byte::b#7 print_byte::b#9 print_byte::b#1 print_byte::b#2 print_byte::b#3 print_byte::b#4 print_byte::b#5 print_byte::b#6 ] ] with [ zp ZP_BYTE:37 [ print_sbyte::b#6 print_sbyte::b#5 print_sbyte::b#1 print_sbyte::b#2 print_sbyte::b#3 print_sbyte::b#4 print_sbyte::b#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:7 [ print_sword::w#6 print_sword::w#5 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#4 print_sword::w#0 print_word::w#5 print_word::w#7 print_word::w#1 print_word::w#2 print_word::w#3 print_word::w#4 test_16s::dividend#0 div16s::dividend#0 ] ] with [ zp ZP_WORD:96 [ test_16u::dividend#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:11 [ print_byte::b#7 print_byte::b#9 print_byte::b#1 print_byte::b#2 print_byte::b#3 print_byte::b#4 print_byte::b#5 print_byte::b#6 print_sbyte::b#6 print_sbyte::b#5 print_sbyte::b#1 print_sbyte::b#2 print_sbyte::b#3 print_sbyte::b#4 print_sbyte::b#0 ] ] with [ zp ZP_BYTE:104 [ test_8u::dividend#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:11 [ print_byte::b#7 print_byte::b#9 print_byte::b#1 print_byte::b#2 print_byte::b#3 print_byte::b#4 print_byte::b#5 print_byte::b#6 ] ] with [ zp ZP_BYTE:37 [ print_sbyte::b#6 print_sbyte::b#5 print_sbyte::b#1 print_sbyte::b#2 print_sbyte::b#3 print_sbyte::b#4 print_sbyte::b#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:17 [ div16s::dividendu#3 div16s::dividendu#7 div16s::dividendu#8 ] ] with [ zp ZP_WORD:24 [ div16u::dividend#2 div16u::dividend#0 div16u::dividend#1 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:11 [ print_byte::b#7 print_byte::b#9 print_byte::b#1 print_byte::b#2 print_byte::b#3 print_byte::b#4 print_byte::b#5 print_byte::b#6 print_sbyte::b#6 print_sbyte::b#5 print_sbyte::b#1 print_sbyte::b#2 print_sbyte::b#3 print_sbyte::b#4 print_sbyte::b#0 ] ] with [ zp ZP_BYTE:82 [ test_8s::dividend#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:17 [ div16s::dividendu#3 div16s::dividendu#7 div16s::dividendu#8 div16u::dividend#2 div16u::dividend#0 div16u::dividend#1 ] ] with [ zp ZP_WORD:56 [ div16s::dividend#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:11 [ print_byte::b#7 print_byte::b#9 print_byte::b#1 print_byte::b#2 print_byte::b#3 print_byte::b#4 print_byte::b#5 print_byte::b#6 print_sbyte::b#6 print_sbyte::b#5 print_sbyte::b#1 print_sbyte::b#2 print_sbyte::b#3 print_sbyte::b#4 print_sbyte::b#0 test_8s::dividend#0 ] ] with [ zp ZP_BYTE:104 [ test_8u::dividend#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:17 [ div16s::dividendu#3 div16s::dividendu#7 div16s::dividendu#8 div16u::dividend#2 div16u::dividend#0 div16u::dividend#1 div16s::dividend#0 ] ] with [ zp ZP_WORD:66 [ div16s::$2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:17 [ div16s::dividendu#3 div16s::dividendu#7 div16s::dividendu#8 ] ] with [ zp ZP_WORD:24 [ div16u::dividend#2 div16u::dividend#0 div16u::dividend#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:19 [ div16s::divisoru#3 div16s::divisoru#4 div16s::divisoru#5 ] ] with [ zp ZP_WORD:26 [ div16u::divisor#2 div16u::divisor#0 div16u::divisor#1 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:17 [ div16s::dividendu#3 div16s::dividendu#7 div16s::dividendu#8 div16u::dividend#2 div16u::dividend#0 div16u::dividend#1 ] ] with [ zp ZP_WORD:30 [ divr16u::dividend#2 divr16u::dividend#0 divr16u::dividend#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:19 [ div16s::divisoru#3 div16s::divisoru#4 div16s::divisoru#5 div16u::divisor#2 div16u::divisor#0 div16u::divisor#1 ] ] with [ zp ZP_WORD:58 [ div16s::divisor#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:17 [ div16s::dividendu#3 div16s::dividendu#7 div16s::dividendu#8 div16u::dividend#2 div16u::dividend#0 div16u::dividend#1 divr16u::dividend#2 divr16u::dividend#0 divr16u::dividend#1 ] ] with [ zp ZP_WORD:66 [ div16s::$2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:19 [ div16s::divisoru#3 div16s::divisoru#4 div16s::divisoru#5 div16u::divisor#2 div16u::divisor#0 div16u::divisor#1 div16s::divisor#0 ] ] with [ zp ZP_WORD:68 [ div16s::$7 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:19 [ div16s::divisoru#3 div16s::divisoru#4 div16s::divisoru#5 ] ] with [ zp ZP_WORD:26 [ div16u::divisor#2 div16u::divisor#0 div16u::divisor#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:22 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 ] ] with [ zp ZP_WORD:60 [ div16s::return#3 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:19 [ div16s::divisoru#3 div16s::divisoru#4 div16s::divisoru#5 div16u::divisor#2 div16u::divisor#0 div16u::divisor#1 ] ] with [ zp ZP_WORD:58 [ div16s::divisor#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:32 [ divr16u::quotient#3 divr16u::return#1 divr16u::quotient#1 divr16u::quotient#2 ] ] with [ zp ZP_WORD:76 [ divr16u::return#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:19 [ div16s::divisoru#3 div16s::divisoru#4 div16s::divisoru#5 div16u::divisor#2 div16u::divisor#0 div16u::divisor#1 div16s::divisor#0 ] ] with [ zp ZP_WORD:68 [ div16s::$7 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:70 [ div16u::return#2 ] ] with [ zp ZP_WORD:78 [ div16u::return#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:19 [ div16s::divisoru#3 div16s::divisoru#4 div16s::divisoru#5 div16u::divisor#2 div16u::divisor#0 div16u::divisor#1 div16s::divisor#0 div16s::$7 ] ] with [ zp ZP_WORD:74 [ divr16u::divisor#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:100 [ div16u::return#3 ] ] with [ zp ZP_WORD:102 [ test_16u::res#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:19 [ div16s::divisoru#3 div16s::divisoru#4 div16s::divisoru#5 div16u::divisor#2 div16u::divisor#0 div16u::divisor#1 div16s::divisor#0 div16s::$7 divr16u::divisor#0 ] ] with [ zp ZP_WORD:98 [ test_16u::divisor#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:7 [ print_sword::w#6 print_sword::w#5 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#4 print_sword::w#0 print_word::w#5 print_word::w#7 print_word::w#1 print_word::w#2 print_word::w#3 print_word::w#4 test_16s::dividend#0 ] ] with [ zp ZP_WORD:96 [ test_16u::dividend#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:22 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 ] ] with [ zp ZP_WORD:60 [ div16s::return#3 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:11 [ print_byte::b#7 print_byte::b#9 print_byte::b#1 print_byte::b#2 print_byte::b#3 print_byte::b#4 print_byte::b#5 print_byte::b#6 print_sbyte::b#6 print_sbyte::b#5 print_sbyte::b#1 print_sbyte::b#2 print_sbyte::b#3 print_sbyte::b#4 print_sbyte::b#0 test_8u::dividend#0 ] ] with [ zp ZP_BYTE:82 [ test_8s::dividend#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:22 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 ] ] with [ zp ZP_WORD:62 [ test_16s::res#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:17 [ div16s::dividendu#3 div16s::dividendu#7 div16s::dividendu#8 div16u::dividend#2 div16u::dividend#0 div16u::dividend#1 div16s::dividend#0 div16s::$2 ] ] with [ zp ZP_WORD:30 [ divr16u::dividend#2 divr16u::dividend#0 divr16u::dividend#1 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:22 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 test_16s::res#0 ] ] with [ zp ZP_WORD:70 [ div16u::return#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:19 [ div16s::divisoru#3 div16s::divisoru#4 div16s::divisoru#5 div16u::divisor#2 div16u::divisor#0 div16u::divisor#1 div16s::divisor#0 div16s::$7 ] ] with [ zp ZP_WORD:74 [ divr16u::divisor#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:22 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 test_16s::res#0 div16u::return#2 ] ] with [ zp ZP_WORD:78 [ div16u::return#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:19 [ div16s::divisoru#3 div16s::divisoru#4 div16s::divisoru#5 div16u::divisor#2 div16u::divisor#0 div16u::divisor#1 div16s::divisor#0 div16s::$7 divr16u::divisor#0 ] ] with [ zp ZP_WORD:98 [ test_16u::divisor#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:22 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 test_16s::res#0 div16u::return#2 div16u::return#0 ] ] with [ zp ZP_WORD:76 [ divr16u::return#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:22 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 ] ] with [ zp ZP_WORD:62 [ test_16s::res#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:22 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 test_16s::res#0 div16u::return#2 div16u::return#0 divr16u::return#0 ] ] with [ zp ZP_WORD:32 [ divr16u::quotient#3 divr16u::return#1 divr16u::quotient#1 divr16u::quotient#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:22 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 test_16s::res#0 ] ] with [ zp ZP_WORD:70 [ div16u::return#2 div16u::return#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:22 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 test_16s::res#0 div16u::return#2 div16u::return#0 divr16u::return#0 divr16u::quotient#3 divr16u::return#1 divr16u::quotient#1 divr16u::quotient#2 ] ] with [ zp ZP_WORD:100 [ div16u::return#3 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:22 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 test_16s::res#0 div16u::return#2 div16u::return#0 ] ] with [ zp ZP_WORD:32 [ divr16u::quotient#3 divr16u::return#1 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:22 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 test_16s::res#0 div16u::return#2 div16u::return#0 divr16u::return#0 divr16u::quotient#3 divr16u::return#1 divr16u::quotient#1 divr16u::quotient#2 div16u::return#3 ] ] with [ zp ZP_WORD:102 [ test_16u::res#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:22 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 test_16s::res#0 div16u::return#2 div16u::return#0 divr16u::quotient#3 divr16u::return#1 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#0 ] ] with [ zp ZP_WORD:100 [ div16u::return#3 test_16u::res#0 ] ] - score: 1
 Coalescing zero page register [ zp ZP_BYTE:2 [ test_16s::i#10 test_16s::i#1 ] ] with [ zp ZP_BYTE:35 [ test_8s::i#10 test_8s::i#1 ] ]
 Coalescing zero page register [ zp ZP_BYTE:2 [ test_16s::i#10 test_16s::i#1 test_8s::i#10 test_8s::i#1 ] ] with [ zp ZP_BYTE:48 [ test_16u::i#10 test_16u::i#1 ] ]
 Coalescing zero page register [ zp ZP_BYTE:2 [ test_16s::i#10 test_16s::i#1 test_8s::i#10 test_8s::i#1 test_16u::i#10 test_16u::i#1 ] ] with [ zp ZP_BYTE:49 [ test_8u::i#10 test_8u::i#1 ] ]
-Coalescing zero page register [ zp ZP_WORD:3 [ rem16s#17 rem16s#3 rem16s#32 rem16s#1 ] ] with [ zp ZP_WORD:17 [ div16s::dividendu#3 div16s::dividendu#7 div16s::dividendu#8 div16u::dividend#2 div16u::dividend#0 div16u::dividend#1 divr16u::dividend#2 divr16u::dividend#0 divr16u::dividend#1 div16s::$2 ] ]
+Coalescing zero page register [ zp ZP_WORD:3 [ rem16s#17 rem16s#3 rem16s#32 rem16s#1 ] ] with [ zp ZP_WORD:17 [ div16s::dividendu#3 div16s::dividendu#7 div16s::dividendu#8 div16u::dividend#2 div16u::dividend#0 div16u::dividend#1 div16s::dividend#0 div16s::$2 divr16u::dividend#2 divr16u::dividend#0 divr16u::dividend#1 ] ]
-Coalescing zero page register [ zp ZP_WORD:3 [ rem16s#17 rem16s#3 rem16s#32 rem16s#1 div16s::dividendu#3 div16s::dividendu#7 div16s::dividendu#8 div16u::dividend#2 div16u::dividend#0 div16u::dividend#1 divr16u::dividend#2 divr16u::dividend#0 divr16u::dividend#1 div16s::$2 ] ] with [ zp ZP_WORD:50 [ print_cls::sc#2 print_cls::sc#1 ] ]
+Coalescing zero page register [ zp ZP_WORD:3 [ rem16s#17 rem16s#3 rem16s#32 rem16s#1 div16s::dividendu#3 div16s::dividendu#7 div16s::dividendu#8 div16u::dividend#2 div16u::dividend#0 div16u::dividend#1 div16s::dividend#0 div16s::$2 divr16u::dividend#2 divr16u::dividend#0 divr16u::dividend#1 ] ] with [ zp ZP_WORD:50 [ print_cls::sc#2 print_cls::sc#1 ] ]
-Coalescing zero page register [ zp ZP_WORD:7 [ print_sword::w#6 print_sword::w#5 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#4 print_sword::w#0 print_word::w#5 print_word::w#7 print_word::w#1 print_word::w#2 print_word::w#3 print_word::w#4 test_16s::dividend#0 div16s::dividend#0 test_16u::dividend#0 ] ] with [ zp ZP_WORD:15 [ print_str::str#13 print_str::str#15 print_str::str#0 ] ]
+Coalescing zero page register [ zp ZP_WORD:7 [ print_sword::w#6 print_sword::w#5 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#4 print_sword::w#0 print_word::w#5 print_word::w#7 print_word::w#1 print_word::w#2 print_word::w#3 print_word::w#4 test_16s::dividend#0 test_16u::dividend#0 ] ] with [ zp ZP_WORD:15 [ print_str::str#13 print_str::str#15 print_str::str#0 ] ]
 Coalescing zero page register [ zp ZP_BYTE:40 [ div8s::neg#4 div8s::neg#3 div8s::neg#2 ] ] with [ zp ZP_BYTE:87 [ test_8s::res#0 ] ]
 Coalescing zero page register [ zp ZP_BYTE:40 [ div8s::neg#4 div8s::neg#3 div8s::neg#2 test_8s::res#0 ] ] with [ zp ZP_BYTE:105 [ test_8u::divisor#0 ] ]
-Allocated (was zp ZP_BYTE:11) zp ZP_BYTE:9 [ print_byte::b#7 print_byte::b#9 print_byte::b#1 print_byte::b#2 print_byte::b#3 print_byte::b#4 print_byte::b#5 print_byte::b#6 print_sbyte::b#6 print_sbyte::b#5 print_sbyte::b#1 print_sbyte::b#2 print_sbyte::b#3 print_sbyte::b#4 print_sbyte::b#0 test_8s::dividend#0 test_8u::dividend#0 ]
+Allocated (was zp ZP_BYTE:11) zp ZP_BYTE:9 [ print_byte::b#7 print_byte::b#9 print_byte::b#1 print_byte::b#2 print_byte::b#3 print_byte::b#4 print_byte::b#5 print_byte::b#6 print_sbyte::b#6 print_sbyte::b#5 print_sbyte::b#1 print_sbyte::b#2 print_sbyte::b#3 print_sbyte::b#4 print_sbyte::b#0 test_8u::dividend#0 test_8s::dividend#0 ]
 Allocated (was zp ZP_WORD:13) zp ZP_WORD:10 [ char_cursor#80 char_cursor#133 char_cursor#130 char_cursor#132 char_cursor#128 char_cursor#129 char_cursor#155 char_cursor#126 char_cursor#17 char_cursor#162 char_cursor#135 char_cursor#131 char_cursor#1 char_cursor#179 char_cursor#185 ]
 Allocated (was zp ZP_WORD:19) zp ZP_WORD:12 [ div16s::divisoru#3 div16s::divisoru#4 div16s::divisoru#5 div16u::divisor#2 div16u::divisor#0 div16u::divisor#1 div16s::divisor#0 div16s::$7 divr16u::divisor#0 test_16u::divisor#0 ]
-Allocated (was zp ZP_WORD:22) zp ZP_WORD:14 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 test_16s::res#0 div16u::return#2 div16u::return#0 divr16u::return#0 divr16u::quotient#3 divr16u::return#1 divr16u::quotient#1 divr16u::quotient#2 div16u::return#3 test_16u::res#0 ]
+Allocated (was zp ZP_WORD:22) zp ZP_WORD:14 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 test_16s::res#0 div16u::return#2 div16u::return#0 divr16u::quotient#3 divr16u::return#1 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#0 div16u::return#3 test_16u::res#0 ]
 Allocated (was zp ZP_WORD:28) zp ZP_WORD:16 [ divr16u::rem#4 rem16u#31 divr16u::rem#10 rem16u#35 divr16u::rem#5 divr16u::rem#1 divr16u::rem#2 divr16u::rem#3 ]
 Allocated (was zp ZP_BYTE:40) zp ZP_BYTE:18 [ div8s::neg#4 div8s::neg#3 div8s::neg#2 test_8s::res#0 test_8u::divisor#0 ]
 Allocated (was zp ZP_BYTE:44) zp ZP_BYTE:19 [ divr8u::rem#4 rem8u#31 divr8u::rem#10 rem8u#36 divr8u::rem#5 divr8u::rem#1 divr8u::rem#2 divr8u::rem#3 ]
@@ -9330,8 +9330,11 @@ test_16s: {
     sta divisor
     lda divisors+1,y
     sta divisor+1
-  //SEG40 [19] (signed word) div16s::dividend#0 ← (signed word) test_16s::dividend#0 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 div16s::dividend#0 line_cursor#1 divr16u::rem#10 ] ( main:2::test_16s:13 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 div16s::dividend#0 line_cursor#1 divr16u::rem#10 ] )
+  //SEG40 [19] (signed word) div16s::dividend#0 ← (signed word) test_16s::dividend#0 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 div16s::dividend#0 line_cursor#1 divr16u::rem#10 ] ( main:2::test_16s:13 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 div16s::dividend#0 line_cursor#1 divr16u::rem#10 ] ) -- vwsz1=vwsz2 
-    // (signed word) div16s::dividend#0 = (signed word) test_16s::dividend#0  // register copy zp ZP_WORD:7
+    lda dividend
+    sta div16s.dividend
+    lda dividend+1
+    sta div16s.dividend+1
   //SEG41 [20] (signed word) div16s::divisor#0 ← (signed word) test_16s::divisor#0 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 div16s::dividend#0 div16s::divisor#0 line_cursor#1 divr16u::rem#10 ] ( main:2::test_16s:13 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 div16s::dividend#0 div16s::divisor#0 line_cursor#1 divr16u::rem#10 ] ) -- vwsz1=vwsz2 
     lda divisor
     sta div16s.divisor
@@ -9693,7 +9696,7 @@ div16s: {
     .label _7 = $c
     .label resultu = $e
     .label return = $e
-    .label dividend = 7
+    .label dividend = 3
     .label divisor = $c
     .label dividendu = 3
     .label divisoru = $c
@@ -9703,13 +9706,13 @@ div16s: {
     jmp b7
   //SEG173 div16s::@7
   b7:
-  //SEG174 [84] (signed word~) div16s::$2 ← - (signed word) div16s::dividend#0 [ div16s::divisor#0 div16s::$2 divr16u::rem#10 ] ( main:2::test_16s:13::div16s:21 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 line_cursor#1 div16s::divisor#0 div16s::$2 divr16u::rem#10 ] ) -- vwsz1=_neg_vwsz2 
+  //SEG174 [84] (signed word~) div16s::$2 ← - (signed word) div16s::dividend#0 [ div16s::divisor#0 div16s::$2 divr16u::rem#10 ] ( main:2::test_16s:13::div16s:21 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 line_cursor#1 div16s::divisor#0 div16s::$2 divr16u::rem#10 ] ) -- vwsz1=_neg_vwsz1 
     sec
-    lda dividend
+    lda _2
     eor #$ff
     adc #0
     sta _2
-    lda dividend+1
+    lda _2+1
     eor #$ff
     adc #0
     sta _2+1
@@ -9824,11 +9827,8 @@ div16s: {
     jmp b4_from_b17
   //SEG213 div16s::@16
   b16:
-  //SEG214 [105] (word~) div16s::dividendu#7 ← (word)(signed word) div16s::dividend#0 [ div16s::divisor#0 div16s::dividendu#7 divr16u::rem#10 ] ( main:2::test_16s:13::div16s:21 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 line_cursor#1 div16s::divisor#0 div16s::dividendu#7 divr16u::rem#10 ] ) -- vwuz1=vwuz2 
+  //SEG214 [105] (word~) div16s::dividendu#7 ← (word)(signed word) div16s::dividend#0 [ div16s::divisor#0 div16s::dividendu#7 divr16u::rem#10 ] ( main:2::test_16s:13::div16s:21 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 line_cursor#1 div16s::divisor#0 div16s::dividendu#7 divr16u::rem#10 ] )
-    lda dividend
+    // (word~) div16s::dividendu#7 = (word)(signed word) div16s::dividend#0  // register copy zp ZP_WORD:3
-    sta dividendu
-    lda dividend+1
-    sta dividendu+1
   //SEG215 [86] phi from div16s::@16 to div16s::@2 [phi:div16s::@16->div16s::@2]
   b2_from_b16:
   //SEG216 [86] phi (word) div16s::dividendu#3 = (word~) div16s::dividendu#7 [phi:div16s::@16->div16s::@2#0] -- register_copy 
@@ -11178,7 +11178,7 @@ Succesful ASM optimization Pass5UnusedLabelElimination
 Removing unreachable instruction jmp b4
 Removing unreachable instruction jmp b4
 Succesful ASM optimization Pass5UnreachableCodeElimination
-Fixing long branch [83] bne b1 to beq
+Fixing long branch [87] bne b1 to beq
 
 FINAL SYMBOL TABLE
 (label) @21
@@ -11216,7 +11216,7 @@ FINAL SYMBOL TABLE
 (label) div16s::@9
 (label) div16s::@return
 (signed word) div16s::dividend
-(signed word) div16s::dividend#0 dividend zp ZP_WORD:7 5.0
+(signed word) div16s::dividend#0 dividend zp ZP_WORD:3 5.0
 (word) div16s::dividendu
 (word) div16s::dividendu#3 dividendu zp ZP_WORD:3 0.8571428571428571
 (word~) div16s::dividendu#7 dividendu zp ZP_WORD:3 4.0
@@ -11584,15 +11584,15 @@ FINAL SYMBOL TABLE
 (const string) test_8u::str2 str2 = (string) " @"
 
 zp ZP_BYTE:2 [ test_16s::i#10 test_16s::i#1 test_8s::i#10 test_8s::i#1 test_16u::i#10 test_16u::i#1 test_8u::i#10 test_8u::i#1 ]
-zp ZP_WORD:3 [ rem16s#17 rem16s#3 rem16s#32 rem16s#1 div16s::dividendu#3 div16s::dividendu#7 div16s::dividendu#8 div16u::dividend#2 div16u::dividend#0 div16u::dividend#1 divr16u::dividend#2 divr16u::dividend#0 divr16u::dividend#1 div16s::$2 print_cls::sc#2 print_cls::sc#1 ]
+zp ZP_WORD:3 [ rem16s#17 rem16s#3 rem16s#32 rem16s#1 div16s::dividendu#3 div16s::dividendu#7 div16s::dividendu#8 div16u::dividend#2 div16u::dividend#0 div16u::dividend#1 div16s::dividend#0 div16s::$2 divr16u::dividend#2 divr16u::dividend#0 divr16u::dividend#1 print_cls::sc#2 print_cls::sc#1 ]
 zp ZP_WORD:5 [ line_cursor#20 line_cursor#39 line_cursor#1 line_cursor#41 ]
-zp ZP_WORD:7 [ print_sword::w#6 print_sword::w#5 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#4 print_sword::w#0 print_word::w#5 print_word::w#7 print_word::w#1 print_word::w#2 print_word::w#3 print_word::w#4 test_16s::dividend#0 div16s::dividend#0 test_16u::dividend#0 print_str::str#13 print_str::str#15 print_str::str#0 ]
+zp ZP_WORD:7 [ print_sword::w#6 print_sword::w#5 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#4 print_sword::w#0 print_word::w#5 print_word::w#7 print_word::w#1 print_word::w#2 print_word::w#3 print_word::w#4 test_16s::dividend#0 test_16u::dividend#0 print_str::str#13 print_str::str#15 print_str::str#0 ]
-zp ZP_BYTE:9 [ print_byte::b#7 print_byte::b#9 print_byte::b#1 print_byte::b#2 print_byte::b#3 print_byte::b#4 print_byte::b#5 print_byte::b#6 print_sbyte::b#6 print_sbyte::b#5 print_sbyte::b#1 print_sbyte::b#2 print_sbyte::b#3 print_sbyte::b#4 print_sbyte::b#0 test_8s::dividend#0 test_8u::dividend#0 ]
+zp ZP_BYTE:9 [ print_byte::b#7 print_byte::b#9 print_byte::b#1 print_byte::b#2 print_byte::b#3 print_byte::b#4 print_byte::b#5 print_byte::b#6 print_sbyte::b#6 print_sbyte::b#5 print_sbyte::b#1 print_sbyte::b#2 print_sbyte::b#3 print_sbyte::b#4 print_sbyte::b#0 test_8u::dividend#0 test_8s::dividend#0 ]
 reg byte a [ print_char::ch#4 print_char::ch#2 print_char::ch#3 ]
 zp ZP_WORD:10 [ char_cursor#80 char_cursor#133 char_cursor#130 char_cursor#132 char_cursor#128 char_cursor#129 char_cursor#155 char_cursor#126 char_cursor#17 char_cursor#162 char_cursor#135 char_cursor#131 char_cursor#1 char_cursor#179 char_cursor#185 ]
 zp ZP_WORD:12 [ div16s::divisoru#3 div16s::divisoru#4 div16s::divisoru#5 div16u::divisor#2 div16u::divisor#0 div16u::divisor#1 div16s::divisor#0 div16s::$7 divr16u::divisor#0 test_16u::divisor#0 ]
 reg byte y [ div16s::neg#4 div16s::neg#3 div16s::neg#2 ]
-zp ZP_WORD:14 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 test_16s::res#0 div16u::return#2 div16u::return#0 divr16u::return#0 divr16u::quotient#3 divr16u::return#1 divr16u::quotient#1 divr16u::quotient#2 div16u::return#3 test_16u::res#0 ]
+zp ZP_WORD:14 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 test_16s::res#0 div16u::return#2 div16u::return#0 divr16u::quotient#3 divr16u::return#1 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#0 div16u::return#3 test_16u::res#0 ]
 zp ZP_WORD:16 [ divr16u::rem#4 rem16u#31 divr16u::rem#10 rem16u#35 divr16u::rem#5 divr16u::rem#1 divr16u::rem#2 divr16u::rem#3 ]
 reg byte x [ divr16u::i#2 divr16u::i#1 ]
 reg byte x [ rem8s#18 rem8s#3 rem8s#33 rem8s#1 ]
@@ -11628,7 +11628,7 @@ reg byte x [ test_8u::res#0 ]
 
 
 FINAL ASSEMBLER
-Score: 33566
+Score: 33674
 
 //SEG0 Basic Upstart
 .pc = $801 "Basic"
@@ -11707,8 +11707,11 @@ test_16s: {
     sta divisor
     lda divisors+1,y
     sta divisor+1
-  //SEG40 [19] (signed word) div16s::dividend#0 ← (signed word) test_16s::dividend#0 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 div16s::dividend#0 line_cursor#1 divr16u::rem#10 ] ( main:2::test_16s:13 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 div16s::dividend#0 line_cursor#1 divr16u::rem#10 ] )
+  //SEG40 [19] (signed word) div16s::dividend#0 ← (signed word) test_16s::dividend#0 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 div16s::dividend#0 line_cursor#1 divr16u::rem#10 ] ( main:2::test_16s:13 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 div16s::dividend#0 line_cursor#1 divr16u::rem#10 ] ) -- vwsz1=vwsz2 
-    // (signed word) div16s::dividend#0 = (signed word) test_16s::dividend#0  // register copy zp ZP_WORD:7
+    lda dividend
+    sta div16s.dividend
+    lda dividend+1
+    sta div16s.dividend+1
   //SEG41 [20] (signed word) div16s::divisor#0 ← (signed word) test_16s::divisor#0 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 div16s::dividend#0 div16s::divisor#0 line_cursor#1 divr16u::rem#10 ] ( main:2::test_16s:13 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 div16s::dividend#0 div16s::divisor#0 line_cursor#1 divr16u::rem#10 ] ) -- vwsz1=vwsz2 
     lda divisor
     sta div16s.divisor
@@ -12002,7 +12005,7 @@ div16s: {
     .label _7 = $c
     .label resultu = $e
     .label return = $e
-    .label dividend = 7
+    .label dividend = 3
     .label divisor = $c
     .label dividendu = 3
     .label divisoru = $c
@@ -12010,13 +12013,13 @@ div16s: {
     lda dividend+1
     bpl b16
   //SEG173 div16s::@7
-  //SEG174 [84] (signed word~) div16s::$2 ← - (signed word) div16s::dividend#0 [ div16s::divisor#0 div16s::$2 divr16u::rem#10 ] ( main:2::test_16s:13::div16s:21 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 line_cursor#1 div16s::divisor#0 div16s::$2 divr16u::rem#10 ] ) -- vwsz1=_neg_vwsz2 
+  //SEG174 [84] (signed word~) div16s::$2 ← - (signed word) div16s::dividend#0 [ div16s::divisor#0 div16s::$2 divr16u::rem#10 ] ( main:2::test_16s:13::div16s:21 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 line_cursor#1 div16s::divisor#0 div16s::$2 divr16u::rem#10 ] ) -- vwsz1=_neg_vwsz1 
     sec
-    lda dividend
+    lda _2
     eor #$ff
     adc #0
     sta _2
-    lda dividend+1
+    lda _2+1
     eor #$ff
     adc #0
     sta _2+1
@@ -12114,11 +12117,8 @@ div16s: {
     // (word~) div16s::divisoru#4 = (word)(signed word) div16s::divisor#0  // register copy zp ZP_WORD:12
   //SEG213 div16s::@16
   b16:
-  //SEG214 [105] (word~) div16s::dividendu#7 ← (word)(signed word) div16s::dividend#0 [ div16s::divisor#0 div16s::dividendu#7 divr16u::rem#10 ] ( main:2::test_16s:13::div16s:21 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 line_cursor#1 div16s::divisor#0 div16s::dividendu#7 divr16u::rem#10 ] ) -- vwuz1=vwuz2 
+  //SEG214 [105] (word~) div16s::dividendu#7 ← (word)(signed word) div16s::dividend#0 [ div16s::divisor#0 div16s::dividendu#7 divr16u::rem#10 ] ( main:2::test_16s:13::div16s:21 [ test_16s::i#10 test_16s::dividend#0 test_16s::divisor#0 line_cursor#1 div16s::divisor#0 div16s::dividendu#7 divr16u::rem#10 ] )
-    lda dividend
+    // (word~) div16s::dividendu#7 = (word)(signed word) div16s::dividend#0  // register copy zp ZP_WORD:3
-    sta dividendu
-    lda dividend+1
-    sta dividendu+1
   //SEG215 [86] phi from div16s::@16 to div16s::@2 [phi:div16s::@16->div16s::@2]
   //SEG216 [86] phi (word) div16s::dividendu#3 = (word~) div16s::dividendu#7 [phi:div16s::@16->div16s::@2#0] -- register_copy 
   //SEG217 [86] phi (byte) div16s::neg#3 = (byte/signed byte/word/signed word/dword/signed dword) 0 [phi:div16s::@16->div16s::@2#1] -- vbuyy=vbuc1 

src/test/java/dk/camelot64/kickc/test/ref/test-division.sym

@@ -33,7 +33,7 @@
 (label) div16s::@9
 (label) div16s::@return
 (signed word) div16s::dividend
-(signed word) div16s::dividend#0 dividend zp ZP_WORD:7 5.0
+(signed word) div16s::dividend#0 dividend zp ZP_WORD:3 5.0
 (word) div16s::dividendu
 (word) div16s::dividendu#3 dividendu zp ZP_WORD:3 0.8571428571428571
 (word~) div16s::dividendu#7 dividendu zp ZP_WORD:3 4.0
@@ -401,15 +401,15 @@
 (const string) test_8u::str2 str2 = (string) " @"
 
 zp ZP_BYTE:2 [ test_16s::i#10 test_16s::i#1 test_8s::i#10 test_8s::i#1 test_16u::i#10 test_16u::i#1 test_8u::i#10 test_8u::i#1 ]
-zp ZP_WORD:3 [ rem16s#17 rem16s#3 rem16s#32 rem16s#1 div16s::dividendu#3 div16s::dividendu#7 div16s::dividendu#8 div16u::dividend#2 div16u::dividend#0 div16u::dividend#1 divr16u::dividend#2 divr16u::dividend#0 divr16u::dividend#1 div16s::$2 print_cls::sc#2 print_cls::sc#1 ]
+zp ZP_WORD:3 [ rem16s#17 rem16s#3 rem16s#32 rem16s#1 div16s::dividendu#3 div16s::dividendu#7 div16s::dividendu#8 div16u::dividend#2 div16u::dividend#0 div16u::dividend#1 div16s::dividend#0 div16s::$2 divr16u::dividend#2 divr16u::dividend#0 divr16u::dividend#1 print_cls::sc#2 print_cls::sc#1 ]
 zp ZP_WORD:5 [ line_cursor#20 line_cursor#39 line_cursor#1 line_cursor#41 ]
-zp ZP_WORD:7 [ print_sword::w#6 print_sword::w#5 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#4 print_sword::w#0 print_word::w#5 print_word::w#7 print_word::w#1 print_word::w#2 print_word::w#3 print_word::w#4 test_16s::dividend#0 div16s::dividend#0 test_16u::dividend#0 print_str::str#13 print_str::str#15 print_str::str#0 ]
+zp ZP_WORD:7 [ print_sword::w#6 print_sword::w#5 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#4 print_sword::w#0 print_word::w#5 print_word::w#7 print_word::w#1 print_word::w#2 print_word::w#3 print_word::w#4 test_16s::dividend#0 test_16u::dividend#0 print_str::str#13 print_str::str#15 print_str::str#0 ]
-zp ZP_BYTE:9 [ print_byte::b#7 print_byte::b#9 print_byte::b#1 print_byte::b#2 print_byte::b#3 print_byte::b#4 print_byte::b#5 print_byte::b#6 print_sbyte::b#6 print_sbyte::b#5 print_sbyte::b#1 print_sbyte::b#2 print_sbyte::b#3 print_sbyte::b#4 print_sbyte::b#0 test_8s::dividend#0 test_8u::dividend#0 ]
+zp ZP_BYTE:9 [ print_byte::b#7 print_byte::b#9 print_byte::b#1 print_byte::b#2 print_byte::b#3 print_byte::b#4 print_byte::b#5 print_byte::b#6 print_sbyte::b#6 print_sbyte::b#5 print_sbyte::b#1 print_sbyte::b#2 print_sbyte::b#3 print_sbyte::b#4 print_sbyte::b#0 test_8u::dividend#0 test_8s::dividend#0 ]
 reg byte a [ print_char::ch#4 print_char::ch#2 print_char::ch#3 ]
 zp ZP_WORD:10 [ char_cursor#80 char_cursor#133 char_cursor#130 char_cursor#132 char_cursor#128 char_cursor#129 char_cursor#155 char_cursor#126 char_cursor#17 char_cursor#162 char_cursor#135 char_cursor#131 char_cursor#1 char_cursor#179 char_cursor#185 ]
 zp ZP_WORD:12 [ div16s::divisoru#3 div16s::divisoru#4 div16s::divisoru#5 div16u::divisor#2 div16u::divisor#0 div16u::divisor#1 div16s::divisor#0 div16s::$7 divr16u::divisor#0 test_16u::divisor#0 ]
 reg byte y [ div16s::neg#4 div16s::neg#3 div16s::neg#2 ]
-zp ZP_WORD:14 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 test_16s::res#0 div16u::return#2 div16u::return#0 divr16u::return#0 divr16u::quotient#3 divr16u::return#1 divr16u::quotient#1 divr16u::quotient#2 div16u::return#3 test_16u::res#0 ]
+zp ZP_WORD:14 [ div16s::return#2 div16s::return#6 div16s::return#0 div16s::resultu#0 div16s::return#3 test_16s::res#0 div16u::return#2 div16u::return#0 divr16u::quotient#3 divr16u::return#1 divr16u::quotient#1 divr16u::quotient#2 divr16u::return#0 div16u::return#3 test_16u::res#0 ]
 zp ZP_WORD:16 [ divr16u::rem#4 rem16u#31 divr16u::rem#10 rem16u#35 divr16u::rem#5 divr16u::rem#1 divr16u::rem#2 divr16u::rem#3 ]
 reg byte x [ divr16u::i#2 divr16u::i#1 ]
 reg byte x [ rem8s#18 rem8s#3 rem8s#33 rem8s#1 ]

src/test/java/dk/camelot64/kickc/test/ref/test-lowhigh.log

@@ -2686,10 +2686,10 @@ Uplifting [print_cls] best 8895 combination zp ZP_WORD:14 [ print_cls::sc#2 prin
 Uplifting [print_char] best 8868 combination reg byte a [ print_char::ch#8 print_char::ch#0 print_char::ch#1 ] 
 Uplifting [print_dword] best 8868 combination zp ZP_DWORD:32 [ print_dword::dw#0 ] 
 Uplifting [print_ln] best 8868 combination 
-Coalescing zero page register [ zp ZP_WORD:16 [ main::$2 ] ] with [ zp ZP_WORD:18 [ main::$32 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:16 [ main::$2 ] ] with [ zp ZP_WORD:18 [ main::$32 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:20 [ main::dw2#1 ] ] with [ zp ZP_DWORD:28 [ main::dw2#10 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:20 [ main::dw2#1 ] ] with [ zp ZP_DWORD:28 [ main::dw2#10 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:20 [ main::dw2#1 main::dw2#10 ] ] with [ zp ZP_DWORD:32 [ print_dword::dw#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:24 [ main::$5 ] ] with [ zp ZP_WORD:26 [ main::$33 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:24 [ main::$5 ] ] with [ zp ZP_WORD:26 [ main::$33 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:20 [ main::dw2#1 main::dw2#10 ] ] with [ zp ZP_DWORD:32 [ print_dword::dw#0 ] ] - score: 1
 Coalescing zero page register [ zp ZP_WORD:6 [ line_cursor#9 line_cursor#19 line_cursor#1 ] ] with [ zp ZP_WORD:14 [ print_cls::sc#2 print_cls::sc#1 ] ]
 Coalescing zero page register [ zp ZP_WORD:12 [ print_word::w#4 print_word::w#2 print_word::w#3 print_word::w#0 print_word::w#1 ] ] with [ zp ZP_WORD:16 [ main::$2 main::$32 ] ]
 Coalescing zero page register [ zp ZP_WORD:12 [ print_word::w#4 print_word::w#2 print_word::w#3 print_word::w#0 print_word::w#1 main::$2 main::$32 ] ] with [ zp ZP_WORD:24 [ main::$5 main::$33 ] ]

src/test/java/dk/camelot64/kickc/test/ref/test-multiply-16bit.log

@@ -9010,43 +9010,43 @@ Attempting to uplift remaining variables inzp ZP_BYTE:71 [ mulf_init::x_2#3 mulf
 Uplifting [mulf_init] best 517145 combination zp ZP_BYTE:71 [ mulf_init::x_2#3 mulf_init::x_2#2 mulf_init::x_2#1 ] 
 Attempting to uplift remaining variables inzp ZP_BYTE:79 [ mulf_init::dir#2 mulf_init::dir#3 ]
 Uplifting [mulf_init] best 517145 combination zp ZP_BYTE:79 [ mulf_init::dir#2 mulf_init::dir#3 ] 
-Coalescing zero page register [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 ] ] with [ zp ZP_WORD:82 [ muls16s::a#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 ] ] with [ zp ZP_WORD:82 [ muls16s::a#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 ] ] with [ zp ZP_WORD:94 [ mul16s::a#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 ] ] with [ zp ZP_WORD:94 [ mul16s::a#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 ] ] with [ zp ZP_WORD:106 [ mul16s_error::a#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 ] ] with [ zp ZP_WORD:106 [ mul16s_error::a#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 ] ] with [ zp ZP_WORD:27 [ print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:5 [ mul16s_compare::b#2 mul16s_compare::b#5 mul16s_compare::b#1 ] ] with [ zp ZP_WORD:84 [ muls16s::b#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 ] ] with [ zp ZP_WORD:21 [ print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:5 [ mul16s_compare::b#2 mul16s_compare::b#5 mul16s_compare::b#1 muls16s::b#0 ] ] with [ zp ZP_WORD:96 [ mul16s::b#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 ] ] with [ zp ZP_WORD:157 [ mul16u_error::a#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:5 [ mul16s_compare::b#2 mul16s_compare::b#5 mul16s_compare::b#1 muls16s::b#0 mul16s::b#0 ] ] with [ zp ZP_WORD:108 [ mul16s_error::b#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 mul16u_error::a#0 ] ] with [ zp ZP_WORD:54 [ mul16u_compare::a#2 mul16u_compare::a#5 mul16u_compare::a#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:13 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 ] ] with [ zp ZP_DWORD:17 [ print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 mul16u_error::a#0 mul16u_compare::a#2 mul16u_compare::a#5 mul16u_compare::a#1 ] ] with [ zp ZP_WORD:137 [ muls16u::a#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:13 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 ] ] with [ zp ZP_DWORD:110 [ mul16s_error::ms#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:5 [ mul16s_compare::b#2 mul16s_compare::b#5 mul16s_compare::b#1 ] ] with [ zp ZP_WORD:84 [ muls16s::b#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:21 [ print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 ] ] with [ zp ZP_WORD:27 [ print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:5 [ mul16s_compare::b#2 mul16s_compare::b#5 mul16s_compare::b#1 muls16s::b#0 ] ] with [ zp ZP_WORD:96 [ mul16s::b#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:21 [ print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 ] ] with [ zp ZP_WORD:157 [ mul16u_error::a#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:5 [ mul16s_compare::b#2 mul16s_compare::b#5 mul16s_compare::b#1 muls16s::b#0 mul16s::b#0 ] ] with [ zp ZP_WORD:108 [ mul16s_error::b#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:29 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 ] ] with [ zp ZP_DWORD:120 [ mul16u::return#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:13 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 ] ] with [ zp ZP_DWORD:17 [ print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:29 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 ] ] with [ zp ZP_DWORD:132 [ mul16s::return#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:13 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 ] ] with [ zp ZP_DWORD:110 [ mul16s_error::ms#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:33 [ mul16u::b#2 mul16u::b#3 mul16u::b#1 ] ] with [ zp ZP_WORD:56 [ mul16u_compare::b#2 mul16u_compare::b#5 mul16u_compare::b#1 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:13 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 ] ] with [ zp ZP_DWORD:90 [ mul16s_compare::ms#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:37 [ mul16u::res#2 mul16u::res#6 mul16u::res#1 ] ] with [ zp ZP_DWORD:149 [ mul16u::return#3 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:13 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 mul16s_compare::ms#0 ] ] with [ zp ZP_DWORD:86 [ muls16s::return#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:47 [ muls16s::m#5 muls16s::return#0 muls16s::m#3 muls16s::m#1 muls16s::m#2 ] ] with [ zp ZP_DWORD:86 [ muls16s::return#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:13 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 mul16s_compare::ms#0 muls16s::return#2 ] ] with [ zp ZP_DWORD:47 [ muls16s::m#5 muls16s::return#0 muls16s::m#3 muls16s::m#1 muls16s::m#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:54 [ mul16u_compare::a#2 mul16u_compare::a#5 mul16u_compare::a#1 ] ] with [ zp ZP_WORD:137 [ muls16u::a#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:13 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 mul16s_compare::ms#0 muls16s::return#2 muls16s::m#5 muls16s::return#0 muls16s::m#3 muls16s::m#1 muls16s::m#2 ] ] with [ zp ZP_DWORD:161 [ mul16u_error::ms#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:62 [ muls16u::return#0 muls16u::m#3 muls16u::m#1 ] ] with [ zp ZP_DWORD:141 [ muls16u::return#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:13 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 mul16s_compare::ms#0 muls16s::return#2 muls16s::m#5 muls16s::return#0 muls16s::m#3 muls16s::m#1 muls16s::m#2 mul16u_error::ms#0 ] ] with [ zp ZP_DWORD:145 [ mul16u_compare::ms#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:98 [ mul16s::return#2 ] ] with [ zp ZP_DWORD:102 [ mul16s_compare::mn#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:13 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 mul16s_compare::ms#0 muls16s::return#2 muls16s::m#5 muls16s::return#0 muls16s::m#3 muls16s::m#1 muls16s::m#2 mul16u_error::ms#0 mul16u_compare::ms#0 ] ] with [ zp ZP_DWORD:141 [ muls16u::return#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:124 [ mul16s::$6 ] ] with [ zp ZP_WORD:126 [ mul16s::$16 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:13 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 mul16s_compare::ms#0 muls16s::return#2 muls16s::m#5 muls16s::return#0 muls16s::m#3 muls16s::m#1 muls16s::m#2 mul16u_error::ms#0 mul16u_compare::ms#0 muls16u::return#2 ] ] with [ zp ZP_DWORD:62 [ muls16u::return#0 muls16u::m#3 muls16u::m#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:128 [ mul16s::$12 ] ] with [ zp ZP_WORD:130 [ mul16s::$17 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:29 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 ] ] with [ zp ZP_DWORD:120 [ mul16u::return#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:145 [ mul16u_compare::ms#0 ] ] with [ zp ZP_DWORD:161 [ mul16u_error::ms#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:29 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 ] ] with [ zp ZP_DWORD:37 [ mul16u::res#2 mul16u::res#6 mul16u::res#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:153 [ mul16u_compare::mn#0 ] ] with [ zp ZP_DWORD:165 [ mul16u_error::mn#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:29 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16u::res#2 mul16u::res#6 mul16u::res#1 ] ] with [ zp ZP_DWORD:132 [ mul16s::return#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 ] ] with [ zp ZP_WORD:21 [ print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 mul16u_error::a#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:29 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16s::return#0 ] ] with [ zp ZP_DWORD:98 [ mul16s::return#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:13 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 ] ] with [ zp ZP_DWORD:90 [ mul16s_compare::ms#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:29 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16s::return#0 mul16s::return#2 ] ] with [ zp ZP_DWORD:102 [ mul16s_compare::mn#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:13 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 mul16s_compare::ms#0 ] ] with [ zp ZP_DWORD:145 [ mul16u_compare::ms#0 mul16u_error::ms#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:29 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16s::return#0 mul16s::return#2 mul16s_compare::mn#0 ] ] with [ zp ZP_DWORD:114 [ mul16s_error::mn#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:29 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16s::return#0 ] ] with [ zp ZP_DWORD:37 [ mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16u::return#3 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:29 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16s::return#0 mul16s::return#2 mul16s_compare::mn#0 mul16s_error::mn#0 ] ] with [ zp ZP_DWORD:149 [ mul16u::return#3 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:29 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16s::return#0 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16u::return#3 ] ] with [ zp ZP_DWORD:98 [ mul16s::return#2 mul16s_compare::mn#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:29 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16s::return#0 mul16s::return#2 mul16s_compare::mn#0 mul16s_error::mn#0 mul16u::return#3 ] ] with [ zp ZP_DWORD:153 [ mul16u_compare::mn#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:33 [ mul16u::b#2 mul16u::b#3 mul16u::b#1 mul16u_compare::b#2 mul16u_compare::b#5 mul16u_compare::b#1 ] ] with [ zp ZP_WORD:139 [ muls16u::b#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_DWORD:29 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16s::return#0 mul16s::return#2 mul16s_compare::mn#0 mul16s_error::mn#0 mul16u::return#3 mul16u_compare::mn#0 ] ] with [ zp ZP_DWORD:165 [ mul16u_error::mn#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:33 [ mul16u::b#2 mul16u::b#3 mul16u::b#1 mul16u_compare::b#2 mul16u_compare::b#5 mul16u_compare::b#1 muls16u::b#0 ] ] with [ zp ZP_WORD:159 [ mul16u_error::b#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:33 [ mul16u::b#2 mul16u::b#3 mul16u::b#1 ] ] with [ zp ZP_WORD:56 [ mul16u_compare::b#2 mul16u_compare::b#5 mul16u_compare::b#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 mul16u_error::a#0 ] ] with [ zp ZP_WORD:54 [ mul16u_compare::a#2 mul16u_compare::a#5 mul16u_compare::a#1 muls16u::a#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:33 [ mul16u::b#2 mul16u::b#3 mul16u::b#1 mul16u_compare::b#2 mul16u_compare::b#5 mul16u_compare::b#1 ] ] with [ zp ZP_WORD:139 [ muls16u::b#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:13 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 mul16s_compare::ms#0 mul16u_compare::ms#0 mul16u_error::ms#0 ] ] with [ zp ZP_DWORD:47 [ muls16s::m#5 muls16s::return#0 muls16s::m#3 muls16s::m#1 muls16s::m#2 muls16s::return#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:33 [ mul16u::b#2 mul16u::b#3 mul16u::b#1 mul16u_compare::b#2 mul16u_compare::b#5 mul16u_compare::b#1 muls16u::b#0 ] ] with [ zp ZP_WORD:159 [ mul16u_error::b#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:13 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 mul16s_compare::ms#0 mul16u_compare::ms#0 mul16u_error::ms#0 muls16s::m#5 muls16s::return#0 muls16s::m#3 muls16s::m#1 muls16s::m#2 muls16s::return#2 ] ] with [ zp ZP_DWORD:62 [ muls16u::return#0 muls16u::m#3 muls16u::m#1 muls16u::return#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:124 [ mul16s::$6 ] ] with [ zp ZP_WORD:126 [ mul16s::$16 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:29 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16s::return#0 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16u::return#3 mul16s::return#2 mul16s_compare::mn#0 ] ] with [ zp ZP_DWORD:114 [ mul16s_error::mn#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:128 [ mul16s::$12 ] ] with [ zp ZP_WORD:130 [ mul16s::$17 ] ]
+Coalescing zero page register with common assignment [ zp ZP_DWORD:29 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16s::return#0 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16u::return#3 mul16s::return#2 mul16s_compare::mn#0 mul16s_error::mn#0 ] ] with [ zp ZP_DWORD:153 [ mul16u_compare::mn#0 mul16u_error::mn#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 mul16u_error::a#0 mul16u_compare::a#2 mul16u_compare::a#5 mul16u_compare::a#1 muls16u::a#0 ] ] with [ zp ZP_WORD:67 [ mulf_init::sqr1_lo#2 mulf_init::sqr1_lo#1 ] ]
+Coalescing zero page register [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 mul16u_error::a#0 mul16u_compare::a#2 mul16u_compare::a#5 mul16u_compare::a#1 muls16u::a#0 ] ] with [ zp ZP_WORD:67 [ mulf_init::sqr1_lo#2 mulf_init::sqr1_lo#1 ] ]
-Coalescing zero page register [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 mul16u_error::a#0 mul16u_compare::a#2 mul16u_compare::a#5 mul16u_compare::a#1 muls16u::a#0 mulf_init::sqr1_lo#2 mulf_init::sqr1_lo#1 ] ] with [ zp ZP_WORD:75 [ mulf_init::sqr2_lo#2 mulf_init::sqr2_lo#1 ] ]
+Coalescing zero page register [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 mul16u_error::a#0 mul16u_compare::a#2 mul16u_compare::a#5 mul16u_compare::a#1 muls16u::a#0 mulf_init::sqr1_lo#2 mulf_init::sqr1_lo#1 ] ] with [ zp ZP_WORD:75 [ mulf_init::sqr2_lo#2 mulf_init::sqr2_lo#1 ] ]
-Coalescing zero page register [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 mul16u_error::a#0 mul16u_compare::a#2 mul16u_compare::a#5 mul16u_compare::a#1 muls16u::a#0 mulf_init::sqr1_lo#2 mulf_init::sqr1_lo#1 mulf_init::sqr2_lo#2 mulf_init::sqr2_lo#1 ] ] with [ zp ZP_WORD:80 [ print_cls::sc#2 print_cls::sc#1 ] ]
+Coalescing zero page register [ zp ZP_WORD:3 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 mul16u_error::a#0 mul16u_compare::a#2 mul16u_compare::a#5 mul16u_compare::a#1 muls16u::a#0 mulf_init::sqr1_lo#2 mulf_init::sqr1_lo#1 mulf_init::sqr2_lo#2 mulf_init::sqr2_lo#1 ] ] with [ zp ZP_WORD:80 [ print_cls::sc#2 print_cls::sc#1 ] ]
 Coalescing zero page register [ zp ZP_WORD:5 [ mul16s_compare::b#2 mul16s_compare::b#5 mul16s_compare::b#1 muls16s::b#0 mul16s::b#0 mul16s_error::b#0 ] ] with [ zp ZP_WORD:60 [ muls16u::i#2 muls16u::i#1 ] ]
 Coalescing zero page register [ zp ZP_WORD:5 [ mul16s_compare::b#2 mul16s_compare::b#5 mul16s_compare::b#1 muls16s::b#0 mul16s::b#0 mul16s_error::b#0 muls16u::i#2 muls16u::i#1 ] ] with [ zp ZP_WORD:69 [ mulf_init::sqr1_hi#2 mulf_init::sqr1_hi#1 ] ]
 Coalescing zero page register [ zp ZP_WORD:5 [ mul16s_compare::b#2 mul16s_compare::b#5 mul16s_compare::b#1 muls16s::b#0 mul16s::b#0 mul16s_error::b#0 muls16u::i#2 muls16u::i#1 mulf_init::sqr1_hi#2 mulf_init::sqr1_hi#1 ] ] with [ zp ZP_WORD:77 [ mulf_init::sqr2_hi#2 mulf_init::sqr2_hi#1 ] ]
@@ -9057,13 +9057,13 @@ Coalescing zero page register [ zp ZP_WORD:11 [ print_str::str#11 print_str::str
 Coalescing zero page register [ zp ZP_WORD:11 [ print_str::str#11 print_str::str#13 print_str::str#0 mul16u::a#3 mul16u::a#6 mul16u::a#8 mul16u::a#2 mul16u::a#0 muls16s::i#2 muls16s::i#1 muls16s::j#2 muls16s::j#1 ] ] with [ zp ZP_WORD:124 [ mul16s::$6 mul16s::$16 ] ]
 Coalescing zero page register [ zp ZP_WORD:11 [ print_str::str#11 print_str::str#13 print_str::str#0 mul16u::a#3 mul16u::a#6 mul16u::a#8 mul16u::a#2 mul16u::a#0 muls16s::i#2 muls16s::i#1 muls16s::j#2 muls16s::j#1 mul16s::$6 mul16s::$16 ] ] with [ zp ZP_WORD:128 [ mul16s::$12 mul16s::$17 ] ]
 Coalescing zero page register [ zp ZP_BYTE:71 [ mulf_init::x_2#3 mulf_init::x_2#2 mulf_init::x_2#1 ] ] with [ zp ZP_BYTE:79 [ mulf_init::dir#2 mulf_init::dir#3 ] ]
-Allocated (was zp ZP_WORD:3) zp ZP_WORD:2 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 mul16u_error::a#0 mul16u_compare::a#2 mul16u_compare::a#5 mul16u_compare::a#1 muls16u::a#0 mulf_init::sqr1_lo#2 mulf_init::sqr1_lo#1 mulf_init::sqr2_lo#2 mulf_init::sqr2_lo#1 print_cls::sc#2 print_cls::sc#1 ]
+Allocated (was zp ZP_WORD:3) zp ZP_WORD:2 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 mul16u_error::a#0 mul16u_compare::a#2 mul16u_compare::a#5 mul16u_compare::a#1 muls16u::a#0 mulf_init::sqr1_lo#2 mulf_init::sqr1_lo#1 mulf_init::sqr2_lo#2 mulf_init::sqr2_lo#1 print_cls::sc#2 print_cls::sc#1 ]
 Allocated (was zp ZP_WORD:5) zp ZP_WORD:4 [ mul16s_compare::b#2 mul16s_compare::b#5 mul16s_compare::b#1 muls16s::b#0 mul16s::b#0 mul16s_error::b#0 muls16u::i#2 muls16u::i#1 mulf_init::sqr1_hi#2 mulf_init::sqr1_hi#1 mulf_init::sqr2_hi#2 mulf_init::sqr2_hi#1 ]
 Allocated (was zp ZP_WORD:9) zp ZP_WORD:6 [ line_cursor#20 line_cursor#39 line_cursor#1 mulf_init::sqr#3 mulf_init::sqr#4 mulf_init::sqr#1 mulf_init::sqr#2 ]
 Allocated (was zp ZP_WORD:11) zp ZP_WORD:8 [ print_str::str#11 print_str::str#13 print_str::str#0 mul16u::a#3 mul16u::a#6 mul16u::a#8 mul16u::a#2 mul16u::a#0 muls16s::i#2 muls16s::i#1 muls16s::j#2 muls16s::j#1 mul16s::$6 mul16s::$16 mul16s::$12 mul16s::$17 ]
-Allocated (was zp ZP_DWORD:13) zp ZP_DWORD:10 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 mul16s_compare::ms#0 muls16s::return#2 muls16s::m#5 muls16s::return#0 muls16s::m#3 muls16s::m#1 muls16s::m#2 mul16u_error::ms#0 mul16u_compare::ms#0 muls16u::return#2 muls16u::return#0 muls16u::m#3 muls16u::m#1 ]
+Allocated (was zp ZP_DWORD:13) zp ZP_DWORD:10 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 mul16s_compare::ms#0 mul16u_compare::ms#0 mul16u_error::ms#0 muls16s::m#5 muls16s::return#0 muls16s::m#3 muls16s::m#1 muls16s::m#2 muls16s::return#2 muls16u::return#0 muls16u::m#3 muls16u::m#1 muls16u::return#2 ]
 Allocated (was zp ZP_WORD:25) zp ZP_WORD:14 [ char_cursor#76 char_cursor#120 char_cursor#116 char_cursor#117 char_cursor#118 char_cursor#130 char_cursor#157 char_cursor#158 char_cursor#113 char_cursor#112 char_cursor#20 char_cursor#1 char_cursor#114 ]
-Allocated (was zp ZP_DWORD:29) zp ZP_DWORD:16 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16s::return#0 mul16s::return#2 mul16s_compare::mn#0 mul16s_error::mn#0 mul16u::return#3 mul16u_compare::mn#0 mul16u_error::mn#0 ]
+Allocated (was zp ZP_DWORD:29) zp ZP_DWORD:16 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16s::return#0 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16u::return#3 mul16s::return#2 mul16s_compare::mn#0 mul16s_error::mn#0 mul16u_compare::mn#0 mul16u_error::mn#0 ]
 Allocated (was zp ZP_WORD:33) zp ZP_WORD:20 [ mul16u::b#2 mul16u::b#3 mul16u::b#1 mul16u_compare::b#2 mul16u_compare::b#5 mul16u_compare::b#1 muls16u::b#0 mul16u_error::b#0 ]
 Allocated (was zp ZP_DWORD:41) zp ZP_DWORD:22 [ mul16u::mb#2 mul16u::mb#0 mul16u::mb#1 ]
 Allocated (was zp ZP_BYTE:71) zp ZP_BYTE:26 [ mulf_init::x_2#3 mulf_init::x_2#2 mulf_init::x_2#1 mulf_init::dir#2 mulf_init::dir#3 ]
@@ -11487,17 +11487,17 @@ FINAL SYMBOL TABLE
 (word) print_word::w#5 w zp ZP_WORD:2 4.666666666666666
 
 reg byte x [ mul16s_compare::i#9 mul16s_compare::i#1 ]
-zp ZP_WORD:2 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 mul16u_error::a#0 mul16u_compare::a#2 mul16u_compare::a#5 mul16u_compare::a#1 muls16u::a#0 mulf_init::sqr1_lo#2 mulf_init::sqr1_lo#1 mulf_init::sqr2_lo#2 mulf_init::sqr2_lo#1 print_cls::sc#2 print_cls::sc#1 ]
+zp ZP_WORD:2 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 mul16u_error::a#0 mul16u_compare::a#2 mul16u_compare::a#5 mul16u_compare::a#1 muls16u::a#0 mulf_init::sqr1_lo#2 mulf_init::sqr1_lo#1 mulf_init::sqr2_lo#2 mulf_init::sqr2_lo#1 print_cls::sc#2 print_cls::sc#1 ]
 zp ZP_WORD:4 [ mul16s_compare::b#2 mul16s_compare::b#5 mul16s_compare::b#1 muls16s::b#0 mul16s::b#0 mul16s_error::b#0 muls16u::i#2 muls16u::i#1 mulf_init::sqr1_hi#2 mulf_init::sqr1_hi#1 mulf_init::sqr2_hi#2 mulf_init::sqr2_hi#1 ]
 reg byte y [ mul16s_compare::j#2 mul16s_compare::j#1 ]
 reg byte a [ mul16s_compare::ok#2 ]
 zp ZP_WORD:6 [ line_cursor#20 line_cursor#39 line_cursor#1 mulf_init::sqr#3 mulf_init::sqr#4 mulf_init::sqr#1 mulf_init::sqr#2 ]
 zp ZP_WORD:8 [ print_str::str#11 print_str::str#13 print_str::str#0 mul16u::a#3 mul16u::a#6 mul16u::a#8 mul16u::a#2 mul16u::a#0 muls16s::i#2 muls16s::i#1 muls16s::j#2 muls16s::j#1 mul16s::$6 mul16s::$16 mul16s::$12 mul16s::$17 ]
-zp ZP_DWORD:10 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 mul16s_compare::ms#0 muls16s::return#2 muls16s::m#5 muls16s::return#0 muls16s::m#3 muls16s::m#1 muls16s::m#2 mul16u_error::ms#0 mul16u_compare::ms#0 muls16u::return#2 muls16u::return#0 muls16u::m#3 muls16u::m#1 ]
+zp ZP_DWORD:10 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 mul16s_compare::ms#0 mul16u_compare::ms#0 mul16u_error::ms#0 muls16s::m#5 muls16s::return#0 muls16s::m#3 muls16s::m#1 muls16s::m#2 muls16s::return#2 muls16u::return#0 muls16u::m#3 muls16u::m#1 muls16u::return#2 ]
 reg byte x [ print_byte::b#2 print_byte::b#0 print_byte::b#1 ]
 reg byte a [ print_char::ch#4 print_char::ch#2 print_char::ch#3 ]
 zp ZP_WORD:14 [ char_cursor#76 char_cursor#120 char_cursor#116 char_cursor#117 char_cursor#118 char_cursor#130 char_cursor#157 char_cursor#158 char_cursor#113 char_cursor#112 char_cursor#20 char_cursor#1 char_cursor#114 ]
-zp ZP_DWORD:16 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16s::return#0 mul16s::return#2 mul16s_compare::mn#0 mul16s_error::mn#0 mul16u::return#3 mul16u_compare::mn#0 mul16u_error::mn#0 ]
+zp ZP_DWORD:16 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16s::return#0 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16u::return#3 mul16s::return#2 mul16s_compare::mn#0 mul16s_error::mn#0 mul16u_compare::mn#0 mul16u_error::mn#0 ]
 zp ZP_WORD:20 [ mul16u::b#2 mul16u::b#3 mul16u::b#1 mul16u_compare::b#2 mul16u_compare::b#5 mul16u_compare::b#1 muls16u::b#0 mul16u_error::b#0 ]
 zp ZP_DWORD:22 [ mul16u::mb#2 mul16u::mb#0 mul16u::mb#1 ]
 reg byte x [ mul16u_compare::i#9 mul16u_compare::i#1 ]

src/test/java/dk/camelot64/kickc/test/ref/test-multiply-16bit.sym

@@ -359,17 +359,17 @@
 (word) print_word::w#5 w zp ZP_WORD:2 4.666666666666666
 
 reg byte x [ mul16s_compare::i#9 mul16s_compare::i#1 ]
-zp ZP_WORD:2 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 mul16u_error::a#0 mul16u_compare::a#2 mul16u_compare::a#5 mul16u_compare::a#1 muls16u::a#0 mulf_init::sqr1_lo#2 mulf_init::sqr1_lo#1 mulf_init::sqr2_lo#2 mulf_init::sqr2_lo#1 print_cls::sc#2 print_cls::sc#1 ]
+zp ZP_WORD:2 [ mul16s_compare::a#2 mul16s_compare::a#5 mul16s_compare::a#1 muls16s::a#0 mul16s::a#0 mul16s_error::a#0 print_word::w#5 print_word::w#3 print_word::w#4 print_word::w#1 print_word::w#2 print_word::w#11 print_sword::w#4 print_sword::w#3 print_sword::w#1 print_sword::w#2 print_sword::w#0 mul16u_error::a#0 mul16u_compare::a#2 mul16u_compare::a#5 mul16u_compare::a#1 muls16u::a#0 mulf_init::sqr1_lo#2 mulf_init::sqr1_lo#1 mulf_init::sqr2_lo#2 mulf_init::sqr2_lo#1 print_cls::sc#2 print_cls::sc#1 ]
 zp ZP_WORD:4 [ mul16s_compare::b#2 mul16s_compare::b#5 mul16s_compare::b#1 muls16s::b#0 mul16s::b#0 mul16s_error::b#0 muls16u::i#2 muls16u::i#1 mulf_init::sqr1_hi#2 mulf_init::sqr1_hi#1 mulf_init::sqr2_hi#2 mulf_init::sqr2_hi#1 ]
 reg byte y [ mul16s_compare::j#2 mul16s_compare::j#1 ]
 reg byte a [ mul16s_compare::ok#2 ]
 zp ZP_WORD:6 [ line_cursor#20 line_cursor#39 line_cursor#1 mulf_init::sqr#3 mulf_init::sqr#4 mulf_init::sqr#1 mulf_init::sqr#2 ]
 zp ZP_WORD:8 [ print_str::str#11 print_str::str#13 print_str::str#0 mul16u::a#3 mul16u::a#6 mul16u::a#8 mul16u::a#2 mul16u::a#0 muls16s::i#2 muls16s::i#1 muls16s::j#2 muls16s::j#1 mul16s::$6 mul16s::$16 mul16s::$12 mul16s::$17 ]
-zp ZP_DWORD:10 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 mul16s_compare::ms#0 muls16s::return#2 muls16s::m#5 muls16s::return#0 muls16s::m#3 muls16s::m#1 muls16s::m#2 mul16u_error::ms#0 mul16u_compare::ms#0 muls16u::return#2 muls16u::return#0 muls16u::m#3 muls16u::m#1 ]
+zp ZP_DWORD:10 [ print_sdword::dw#4 print_sdword::dw#3 print_sdword::dw#1 print_sdword::dw#2 print_sdword::dw#0 print_dword::dw#3 print_dword::dw#1 print_dword::dw#2 print_dword::dw#0 mul16s_error::ms#0 mul16s_compare::ms#0 mul16u_compare::ms#0 mul16u_error::ms#0 muls16s::m#5 muls16s::return#0 muls16s::m#3 muls16s::m#1 muls16s::m#2 muls16s::return#2 muls16u::return#0 muls16u::m#3 muls16u::m#1 muls16u::return#2 ]
 reg byte x [ print_byte::b#2 print_byte::b#0 print_byte::b#1 ]
 reg byte a [ print_char::ch#4 print_char::ch#2 print_char::ch#3 ]
 zp ZP_WORD:14 [ char_cursor#76 char_cursor#120 char_cursor#116 char_cursor#117 char_cursor#118 char_cursor#130 char_cursor#157 char_cursor#158 char_cursor#113 char_cursor#112 char_cursor#20 char_cursor#1 char_cursor#114 ]
-zp ZP_DWORD:16 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16s::return#0 mul16s::return#2 mul16s_compare::mn#0 mul16s_error::mn#0 mul16u::return#3 mul16u_compare::mn#0 mul16u_error::mn#0 ]
+zp ZP_DWORD:16 [ mul16s::m#4 mul16s::m#5 mul16s::m#1 mul16s::m#0 mul16s::m#2 mul16u::return#2 mul16s::return#0 mul16u::res#2 mul16u::res#6 mul16u::res#1 mul16u::return#3 mul16s::return#2 mul16s_compare::mn#0 mul16s_error::mn#0 mul16u_compare::mn#0 mul16u_error::mn#0 ]
 zp ZP_WORD:20 [ mul16u::b#2 mul16u::b#3 mul16u::b#1 mul16u_compare::b#2 mul16u_compare::b#5 mul16u_compare::b#1 muls16u::b#0 mul16u_error::b#0 ]
 zp ZP_DWORD:22 [ mul16u::mb#2 mul16u::mb#0 mul16u::mb#1 ]
 reg byte x [ mul16u_compare::i#9 mul16u_compare::i#1 ]

src/test/java/dk/camelot64/kickc/test/ref/test-multiply-8bit.log

@@ -10677,38 +10677,38 @@ Attempting to uplift remaining variables inzp ZP_BYTE:79 [ mul8s_error::b#0 ]
 Uplifting [mul8s_error] best 293696 combination zp ZP_BYTE:79 [ mul8s_error::b#0 ] 
 Attempting to uplift remaining variables inzp ZP_BYTE:118 [ mul8u_error::b#0 ]
 Uplifting [mul8u_error] best 293696 combination zp ZP_BYTE:118 [ mul8u_error::b#0 ] 
-Coalescing zero page register [ zp ZP_BYTE:2 [ mul8s_compare::a#7 mul8s_compare::a#1 ] ] with [ zp ZP_BYTE:60 [ muls8s::a#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:2 [ mul8s_compare::a#7 mul8s_compare::a#1 ] ] with [ zp ZP_BYTE:60 [ muls8s::a#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:2 [ mul8s_compare::a#7 mul8s_compare::a#1 muls8s::a#0 ] ] with [ zp ZP_BYTE:72 [ mul8s::a#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:2 [ mul8s_compare::a#7 mul8s_compare::a#1 muls8s::a#0 ] ] with [ zp ZP_BYTE:72 [ mul8s::a#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:3 [ mul8s_compare::b#10 mul8s_compare::b#1 ] ] with [ zp ZP_BYTE:67 [ mulf8s::b#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:3 [ mul8s_compare::b#10 mul8s_compare::b#1 ] ] with [ zp ZP_BYTE:67 [ mulf8s::b#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:3 [ mul8s_compare::b#10 mul8s_compare::b#1 mulf8s::b#0 ] ] with [ zp ZP_BYTE:79 [ mul8s_error::b#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:3 [ mul8s_compare::b#10 mul8s_compare::b#1 mulf8s::b#0 ] ] with [ zp ZP_BYTE:79 [ mul8s_error::b#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 ] ] with [ zp ZP_WORD:11 [ print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 ] ] with [ zp ZP_WORD:11 [ print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 ] ] with [ zp ZP_WORD:42 [ mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 ] ] with [ zp ZP_WORD:80 [ mul8s_error::ms#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 ] ] with [ zp ZP_WORD:80 [ mul8s_error::ms#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:18 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 ] ] with [ zp ZP_WORD:74 [ mul8s::return#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_error::ms#0 ] ] with [ zp ZP_WORD:64 [ mul8s_compare::ms#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:18 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 ] ] with [ zp ZP_WORD:88 [ mul8u::return#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_error::ms#0 mul8s_compare::ms#0 ] ] with [ zp ZP_WORD:62 [ muls8s::return#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:22 [ mul8u::res#2 mul8u::res#6 mul8u::res#1 ] ] with [ zp ZP_WORD:113 [ mul8u::return#3 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_error::ms#0 mul8s_compare::ms#0 muls8s::return#2 ] ] with [ zp ZP_WORD:31 [ muls8s::m#5 muls8s::return#0 muls8s::m#3 muls8s::m#1 muls8s::m#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:26 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 ] ] with [ zp ZP_WORD:68 [ mulf8s::return#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_error::ms#0 mul8s_compare::ms#0 muls8s::return#2 muls8s::m#5 muls8s::return#0 muls8s::m#3 muls8s::m#1 muls8s::m#2 ] ] with [ zp ZP_WORD:119 [ mul8u_error::ms#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:26 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 ] ] with [ zp ZP_WORD:95 [ mulf8u::return#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_error::ms#0 mul8s_compare::ms#0 muls8s::return#2 muls8s::m#5 muls8s::return#0 muls8s::m#3 muls8s::m#1 muls8s::m#2 mul8u_error::ms#0 ] ] with [ zp ZP_WORD:107 [ mul8u_compare::ms#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:31 [ muls8s::m#5 muls8s::return#0 muls8s::m#3 muls8s::m#1 muls8s::m#2 ] ] with [ zp ZP_WORD:62 [ muls8s::return#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_error::ms#0 mul8s_compare::ms#0 muls8s::return#2 muls8s::m#5 muls8s::return#0 muls8s::m#3 muls8s::m#1 muls8s::m#2 mul8u_error::ms#0 mul8u_compare::ms#0 ] ] with [ zp ZP_WORD:105 [ muls8u::return#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:34 [ mul8u_compare::a#7 mul8u_compare::a#1 ] ] with [ zp ZP_BYTE:103 [ muls8u::a#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_error::ms#0 mul8s_compare::ms#0 muls8s::return#2 muls8s::m#5 muls8s::return#0 muls8s::m#3 muls8s::m#1 muls8s::m#2 mul8u_error::ms#0 mul8u_compare::ms#0 muls8u::return#2 ] ] with [ zp ZP_WORD:38 [ muls8u::return#0 muls8u::m#3 muls8u::m#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:35 [ mul8u_compare::b#10 mul8u_compare::b#1 ] ] with [ zp ZP_BYTE:118 [ mul8u_error::b#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:18 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 ] ] with [ zp ZP_WORD:74 [ mul8s::return#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:38 [ muls8u::return#0 muls8u::m#3 muls8u::m#1 ] ] with [ zp ZP_WORD:105 [ muls8u::return#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:18 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 ] ] with [ zp ZP_WORD:76 [ mul8s_compare::mn#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:70 [ mul8s_compare::mf#0 ] ] with [ zp ZP_WORD:84 [ mul8s_error::mf#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:18 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 mul8s_compare::mn#0 ] ] with [ zp ZP_WORD:82 [ mul8s_error::mn#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:76 [ mul8s_compare::mn#0 ] ] with [ zp ZP_WORD:82 [ mul8s_error::mn#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:18 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 mul8s_compare::mn#0 mul8s_error::mn#0 ] ] with [ zp ZP_WORD:88 [ mul8u::return#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:101 [ mulf8u::return#0 ] ] with [ zp ZP_WORD:109 [ mulf8u::return#3 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:18 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 mul8s_compare::mn#0 mul8s_error::mn#0 mul8u::return#2 ] ] with [ zp ZP_WORD:22 [ mul8u::res#2 mul8u::res#6 mul8u::res#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:107 [ mul8u_compare::ms#0 ] ] with [ zp ZP_WORD:119 [ mul8u_error::ms#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:18 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 mul8s_compare::mn#0 mul8s_error::mn#0 mul8u::return#2 mul8u::res#2 mul8u::res#6 mul8u::res#1 ] ] with [ zp ZP_WORD:113 [ mul8u::return#3 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:111 [ mul8u_compare::mf#0 ] ] with [ zp ZP_WORD:123 [ mul8u_error::mf#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:18 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 mul8s_compare::mn#0 mul8s_error::mn#0 mul8u::return#2 mul8u::res#2 mul8u::res#6 mul8u::res#1 mul8u::return#3 ] ] with [ zp ZP_WORD:115 [ mul8u_compare::mn#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:115 [ mul8u_compare::mn#0 ] ] with [ zp ZP_WORD:121 [ mul8u_error::mn#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:18 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 mul8s_compare::mn#0 mul8s_error::mn#0 mul8u::return#2 mul8u::res#2 mul8u::res#6 mul8u::res#1 mul8u::return#3 mul8u_compare::mn#0 ] ] with [ zp ZP_WORD:121 [ mul8u_error::mn#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mul8s_error::ms#0 ] ] with [ zp ZP_WORD:42 [ mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:26 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 ] ] with [ zp ZP_WORD:68 [ mulf8s::return#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mul8s_error::ms#0 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 ] ] with [ zp ZP_WORD:64 [ mul8s_compare::ms#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:26 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 ] ] with [ zp ZP_WORD:70 [ mul8s_compare::mf#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mul8s_error::ms#0 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_compare::ms#0 ] ] with [ zp ZP_WORD:107 [ mul8u_compare::ms#0 mul8u_error::ms#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:26 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 mul8s_compare::mf#0 ] ] with [ zp ZP_WORD:84 [ mul8s_error::mf#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:18 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 mul8u::return#2 ] ] with [ zp ZP_WORD:22 [ mul8u::res#2 mul8u::res#6 mul8u::res#1 mul8u::return#3 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:26 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 mul8s_compare::mf#0 mul8s_error::mf#0 ] ] with [ zp ZP_WORD:95 [ mulf8u::return#2 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:18 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 mul8u::return#2 mul8u::res#2 mul8u::res#6 mul8u::res#1 mul8u::return#3 ] ] with [ zp ZP_WORD:76 [ mul8s_compare::mn#0 mul8s_error::mn#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:26 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 mul8s_compare::mf#0 mul8s_error::mf#0 mulf8u::return#2 ] ] with [ zp ZP_WORD:101 [ mulf8u::return#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:26 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 mulf8u::return#2 ] ] with [ zp ZP_WORD:70 [ mul8s_compare::mf#0 mul8s_error::mf#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:26 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 mul8s_compare::mf#0 mul8s_error::mf#0 mulf8u::return#2 mulf8u::return#0 ] ] with [ zp ZP_WORD:109 [ mulf8u::return#3 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:26 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 mulf8u::return#2 mul8s_compare::mf#0 mul8s_error::mf#0 ] ] with [ zp ZP_WORD:101 [ mulf8u::return#0 mulf8u::return#3 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:26 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 mul8s_compare::mf#0 mul8s_error::mf#0 mulf8u::return#2 mulf8u::return#0 mulf8u::return#3 ] ] with [ zp ZP_WORD:111 [ mul8u_compare::mf#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mul8s_error::ms#0 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_compare::ms#0 mul8u_compare::ms#0 mul8u_error::ms#0 ] ] with [ zp ZP_WORD:31 [ muls8s::m#5 muls8s::return#0 muls8s::m#3 muls8s::m#1 muls8s::m#2 muls8s::return#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_WORD:26 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 mul8s_compare::mf#0 mul8s_error::mf#0 mulf8u::return#2 mulf8u::return#0 mulf8u::return#3 mul8u_compare::mf#0 ] ] with [ zp ZP_WORD:123 [ mul8u_error::mf#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mul8s_error::ms#0 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_compare::ms#0 mul8u_compare::ms#0 mul8u_error::ms#0 muls8s::m#5 muls8s::return#0 muls8s::m#3 muls8s::m#1 muls8s::m#2 muls8s::return#2 ] ] with [ zp ZP_WORD:38 [ muls8u::return#0 muls8u::m#3 muls8u::m#1 muls8u::return#2 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:34 [ mul8u_compare::a#7 mul8u_compare::a#1 ] ] with [ zp ZP_BYTE:103 [ muls8u::a#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:18 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 mul8u::return#2 mul8u::res#2 mul8u::res#6 mul8u::res#1 mul8u::return#3 mul8s_compare::mn#0 mul8s_error::mn#0 ] ] with [ zp ZP_WORD:115 [ mul8u_compare::mn#0 mul8u_error::mn#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:35 [ mul8u_compare::b#10 mul8u_compare::b#1 ] ] with [ zp ZP_BYTE:118 [ mul8u_error::b#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:26 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 mulf8u::return#2 mul8s_compare::mf#0 mul8s_error::mf#0 mulf8u::return#0 mulf8u::return#3 ] ] with [ zp ZP_WORD:111 [ mul8u_compare::mf#0 mul8u_error::mf#0 ] ] - score: 1
 Coalescing zero page register [ zp ZP_BYTE:2 [ mul8s_compare::a#7 mul8s_compare::a#1 muls8s::a#0 mul8s::a#0 ] ] with [ zp ZP_BYTE:34 [ mul8u_compare::a#7 mul8u_compare::a#1 muls8u::a#0 ] ]
 Coalescing zero page register [ zp ZP_BYTE:2 [ mul8s_compare::a#7 mul8s_compare::a#1 muls8s::a#0 mul8s::a#0 mul8u_compare::a#7 mul8u_compare::a#1 muls8u::a#0 ] ] with [ zp ZP_BYTE:49 [ mulf_init::x_2#3 mulf_init::x_2#2 mulf_init::x_2#1 ] ]
 Coalescing zero page register [ zp ZP_BYTE:2 [ mul8s_compare::a#7 mul8s_compare::a#1 muls8s::a#0 mul8s::a#0 mul8u_compare::a#7 mul8u_compare::a#1 muls8u::a#0 mulf_init::x_2#3 mulf_init::x_2#2 mulf_init::x_2#1 ] ] with [ zp ZP_BYTE:57 [ mulf_init::dir#2 mulf_init::dir#3 ] ]
@@ -10720,13 +10720,13 @@ Coalescing zero page register [ zp ZP_WORD:5 [ line_cursor#23 line_cursor#45 lin
 Coalescing zero page register [ zp ZP_WORD:7 [ print_str::str#16 print_str::str#18 print_str::str#0 ] ] with [ zp ZP_WORD:24 [ mul8u::mb#2 mul8u::mb#0 mul8u::mb#1 ] ]
 Coalescing zero page register [ zp ZP_WORD:7 [ print_str::str#16 print_str::str#18 print_str::str#0 mul8u::mb#2 mul8u::mb#0 mul8u::mb#1 ] ] with [ zp ZP_WORD:47 [ mulf_init::sqr1_hi#2 mulf_init::sqr1_hi#1 ] ]
 Coalescing zero page register [ zp ZP_WORD:7 [ print_str::str#16 print_str::str#18 print_str::str#0 mul8u::mb#2 mul8u::mb#0 mul8u::mb#1 mulf_init::sqr1_hi#2 mulf_init::sqr1_hi#1 ] ] with [ zp ZP_WORD:55 [ mulf_init::sqr2_hi#2 mulf_init::sqr2_hi#1 ] ]
-Coalescing zero page register [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_error::ms#0 mul8s_compare::ms#0 muls8s::return#2 muls8s::m#5 muls8s::return#0 muls8s::m#3 muls8s::m#1 muls8s::m#2 mul8u_error::ms#0 mul8u_compare::ms#0 muls8u::return#2 muls8u::return#0 muls8u::m#3 muls8u::m#1 ] ] with [ zp ZP_WORD:50 [ mulf_init::sqr#3 mulf_init::sqr#4 mulf_init::sqr#1 mulf_init::sqr#2 ] ]
+Coalescing zero page register [ zp ZP_WORD:9 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mul8s_error::ms#0 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_compare::ms#0 mul8u_compare::ms#0 mul8u_error::ms#0 muls8s::m#5 muls8s::return#0 muls8s::m#3 muls8s::m#1 muls8s::m#2 muls8s::return#2 muls8u::return#0 muls8u::m#3 muls8u::m#1 muls8u::return#2 ] ] with [ zp ZP_WORD:50 [ mulf_init::sqr#3 mulf_init::sqr#4 mulf_init::sqr#1 mulf_init::sqr#2 ] ]
 Allocated (was zp ZP_WORD:5) zp ZP_WORD:4 [ line_cursor#23 line_cursor#45 line_cursor#1 line_cursor#10 mulf_tables_cmp::kc_sqr#2 mulf_tables_cmp::kc_sqr#1 mulf_init::sqr1_lo#2 mulf_init::sqr1_lo#1 mulf_init::sqr2_lo#2 mulf_init::sqr2_lo#1 print_cls::sc#2 print_cls::sc#1 ]
 Allocated (was zp ZP_WORD:7) zp ZP_WORD:6 [ print_str::str#16 print_str::str#18 print_str::str#0 mul8u::mb#2 mul8u::mb#0 mul8u::mb#1 mulf_init::sqr1_hi#2 mulf_init::sqr1_hi#1 mulf_init::sqr2_hi#2 mulf_init::sqr2_hi#1 ]
-Allocated (was zp ZP_WORD:9) zp ZP_WORD:8 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_error::ms#0 mul8s_compare::ms#0 muls8s::return#2 muls8s::m#5 muls8s::return#0 muls8s::m#3 muls8s::m#1 muls8s::m#2 mul8u_error::ms#0 mul8u_compare::ms#0 muls8u::return#2 muls8u::return#0 muls8u::m#3 muls8u::m#1 mulf_init::sqr#3 mulf_init::sqr#4 mulf_init::sqr#1 mulf_init::sqr#2 ]
+Allocated (was zp ZP_WORD:9) zp ZP_WORD:8 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mul8s_error::ms#0 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_compare::ms#0 mul8u_compare::ms#0 mul8u_error::ms#0 muls8s::m#5 muls8s::return#0 muls8s::m#3 muls8s::m#1 muls8s::m#2 muls8s::return#2 muls8u::return#0 muls8u::m#3 muls8u::m#1 muls8u::return#2 mulf_init::sqr#3 mulf_init::sqr#4 mulf_init::sqr#1 mulf_init::sqr#2 ]
 Allocated (was zp ZP_WORD:15) zp ZP_WORD:10 [ char_cursor#82 char_cursor#137 char_cursor#136 char_cursor#132 char_cursor#149 char_cursor#188 char_cursor#189 char_cursor#131 char_cursor#130 char_cursor#17 char_cursor#30 char_cursor#1 char_cursor#134 char_cursor#222 ]
-Allocated (was zp ZP_WORD:18) zp ZP_WORD:12 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 mul8s_compare::mn#0 mul8s_error::mn#0 mul8u::return#2 mul8u::res#2 mul8u::res#6 mul8u::res#1 mul8u::return#3 mul8u_compare::mn#0 mul8u_error::mn#0 ]
+Allocated (was zp ZP_WORD:18) zp ZP_WORD:12 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 mul8u::return#2 mul8u::res#2 mul8u::res#6 mul8u::res#1 mul8u::return#3 mul8s_compare::mn#0 mul8s_error::mn#0 mul8u_compare::mn#0 mul8u_error::mn#0 ]
-Allocated (was zp ZP_WORD:26) zp ZP_WORD:14 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 mul8s_compare::mf#0 mul8s_error::mf#0 mulf8u::return#2 mulf8u::return#0 mulf8u::return#3 mul8u_compare::mf#0 mul8u_error::mf#0 ]
+Allocated (was zp ZP_WORD:26) zp ZP_WORD:14 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 mulf8u::return#2 mul8s_compare::mf#0 mul8s_error::mf#0 mulf8u::return#0 mulf8u::return#3 mul8u_compare::mf#0 mul8u_error::mf#0 ]
 
 ASSEMBLER BEFORE OPTIMIZATION
 //SEG0 Basic Upstart
@@ -13549,15 +13549,15 @@ zp ZP_BYTE:3 [ mul8s_compare::b#10 mul8s_compare::b#1 mulf8s::b#0 mul8s_error::b
 reg byte x [ mul8s_compare::ok#3 mul8s_compare::ok#4 ]
 zp ZP_WORD:4 [ line_cursor#23 line_cursor#45 line_cursor#1 line_cursor#10 mulf_tables_cmp::kc_sqr#2 mulf_tables_cmp::kc_sqr#1 mulf_init::sqr1_lo#2 mulf_init::sqr1_lo#1 mulf_init::sqr2_lo#2 mulf_init::sqr2_lo#1 print_cls::sc#2 print_cls::sc#1 ]
 zp ZP_WORD:6 [ print_str::str#16 print_str::str#18 print_str::str#0 mul8u::mb#2 mul8u::mb#0 mul8u::mb#1 mulf_init::sqr1_hi#2 mulf_init::sqr1_hi#1 mulf_init::sqr2_hi#2 mulf_init::sqr2_hi#1 ]
-zp ZP_WORD:8 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_error::ms#0 mul8s_compare::ms#0 muls8s::return#2 muls8s::m#5 muls8s::return#0 muls8s::m#3 muls8s::m#1 muls8s::m#2 mul8u_error::ms#0 mul8u_compare::ms#0 muls8u::return#2 muls8u::return#0 muls8u::m#3 muls8u::m#1 mulf_init::sqr#3 mulf_init::sqr#4 mulf_init::sqr#1 mulf_init::sqr#2 ]
+zp ZP_WORD:8 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mul8s_error::ms#0 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_compare::ms#0 mul8u_compare::ms#0 mul8u_error::ms#0 muls8s::m#5 muls8s::return#0 muls8s::m#3 muls8s::m#1 muls8s::m#2 muls8s::return#2 muls8u::return#0 muls8u::m#3 muls8u::m#1 muls8u::return#2 mulf_init::sqr#3 mulf_init::sqr#4 mulf_init::sqr#1 mulf_init::sqr#2 ]
 reg byte x [ print_byte::b#5 print_byte::b#3 print_byte::b#4 print_byte::b#9 print_byte::b#1 print_byte::b#2 ]
 reg byte a [ print_char::ch#4 print_char::ch#2 print_char::ch#3 ]
 zp ZP_WORD:10 [ char_cursor#82 char_cursor#137 char_cursor#136 char_cursor#132 char_cursor#149 char_cursor#188 char_cursor#189 char_cursor#131 char_cursor#130 char_cursor#17 char_cursor#30 char_cursor#1 char_cursor#134 char_cursor#222 ]
 reg byte x [ print_sbyte::b#4 print_sbyte::b#3 print_sbyte::b#1 print_sbyte::b#2 print_sbyte::b#0 ]
-zp ZP_WORD:12 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 mul8s_compare::mn#0 mul8s_error::mn#0 mul8u::return#2 mul8u::res#2 mul8u::res#6 mul8u::res#1 mul8u::return#3 mul8u_compare::mn#0 mul8u_error::mn#0 ]
+zp ZP_WORD:12 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 mul8u::return#2 mul8u::res#2 mul8u::res#6 mul8u::res#1 mul8u::return#3 mul8s_compare::mn#0 mul8s_error::mn#0 mul8u_compare::mn#0 mul8u_error::mn#0 ]
 reg byte a [ mul8u::b#2 mul8u::b#3 mul8u::b#1 ]
 reg byte x [ mul8u::a#3 mul8u::a#6 mul8u::a#8 mul8u::a#2 mul8u::a#0 ]
-zp ZP_WORD:14 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 mul8s_compare::mf#0 mul8s_error::mf#0 mulf8u::return#2 mulf8u::return#0 mulf8u::return#3 mul8u_compare::mf#0 mul8u_error::mf#0 ]
+zp ZP_WORD:14 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 mulf8u::return#2 mul8s_compare::mf#0 mul8s_error::mf#0 mulf8u::return#0 mulf8u::return#3 mul8u_compare::mf#0 mul8u_error::mf#0 ]
 reg byte a [ mulf8u::a#2 mulf8u::a#1 mulf8u::a#4 ]
 reg byte x [ mulf8u::b#2 mulf8u::b#1 mulf8u::b#4 ]
 reg byte y [ muls8s::i#2 muls8s::i#1 ]

src/test/java/dk/camelot64/kickc/test/ref/test-multiply-8bit.sym

@@ -441,15 +441,15 @@ zp ZP_BYTE:3 [ mul8s_compare::b#10 mul8s_compare::b#1 mulf8s::b#0 mul8s_error::b
 reg byte x [ mul8s_compare::ok#3 mul8s_compare::ok#4 ]
 zp ZP_WORD:4 [ line_cursor#23 line_cursor#45 line_cursor#1 line_cursor#10 mulf_tables_cmp::kc_sqr#2 mulf_tables_cmp::kc_sqr#1 mulf_init::sqr1_lo#2 mulf_init::sqr1_lo#1 mulf_init::sqr2_lo#2 mulf_init::sqr2_lo#1 print_cls::sc#2 print_cls::sc#1 ]
 zp ZP_WORD:6 [ print_str::str#16 print_str::str#18 print_str::str#0 mul8u::mb#2 mul8u::mb#0 mul8u::mb#1 mulf_init::sqr1_hi#2 mulf_init::sqr1_hi#1 mulf_init::sqr2_hi#2 mulf_init::sqr2_hi#1 ]
-zp ZP_WORD:8 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_error::ms#0 mul8s_compare::ms#0 muls8s::return#2 muls8s::m#5 muls8s::return#0 muls8s::m#3 muls8s::m#1 muls8s::m#2 mul8u_error::ms#0 mul8u_compare::ms#0 muls8u::return#2 muls8u::return#0 muls8u::m#3 muls8u::m#1 mulf_init::sqr#3 mulf_init::sqr#4 mulf_init::sqr#1 mulf_init::sqr#2 ]
+zp ZP_WORD:8 [ print_sword::w#5 print_sword::w#4 print_sword::w#1 print_sword::w#2 print_sword::w#3 print_sword::w#0 print_word::w#6 print_word::w#3 print_word::w#4 print_word::w#5 print_word::w#11 print_word::w#12 print_word::w#13 mul8s_error::ms#0 mulf_tables_cmp::asm_sqr#2 mulf_tables_cmp::asm_sqr#1 mul8s_compare::ms#0 mul8u_compare::ms#0 mul8u_error::ms#0 muls8s::m#5 muls8s::return#0 muls8s::m#3 muls8s::m#1 muls8s::m#2 muls8s::return#2 muls8u::return#0 muls8u::m#3 muls8u::m#1 muls8u::return#2 mulf_init::sqr#3 mulf_init::sqr#4 mulf_init::sqr#1 mulf_init::sqr#2 ]
 reg byte x [ print_byte::b#5 print_byte::b#3 print_byte::b#4 print_byte::b#9 print_byte::b#1 print_byte::b#2 ]
 reg byte a [ print_char::ch#4 print_char::ch#2 print_char::ch#3 ]
 zp ZP_WORD:10 [ char_cursor#82 char_cursor#137 char_cursor#136 char_cursor#132 char_cursor#149 char_cursor#188 char_cursor#189 char_cursor#131 char_cursor#130 char_cursor#17 char_cursor#30 char_cursor#1 char_cursor#134 char_cursor#222 ]
 reg byte x [ print_sbyte::b#4 print_sbyte::b#3 print_sbyte::b#1 print_sbyte::b#2 print_sbyte::b#0 ]
-zp ZP_WORD:12 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 mul8s_compare::mn#0 mul8s_error::mn#0 mul8u::return#2 mul8u::res#2 mul8u::res#6 mul8u::res#1 mul8u::return#3 mul8u_compare::mn#0 mul8u_error::mn#0 ]
+zp ZP_WORD:12 [ mul8s::m#4 mul8s::m#5 mul8s::m#1 mul8s::m#0 mul8s::m#2 mul8s::return#2 mul8u::return#2 mul8u::res#2 mul8u::res#6 mul8u::res#1 mul8u::return#3 mul8s_compare::mn#0 mul8s_error::mn#0 mul8u_compare::mn#0 mul8u_error::mn#0 ]
 reg byte a [ mul8u::b#2 mul8u::b#3 mul8u::b#1 ]
 reg byte x [ mul8u::a#3 mul8u::a#6 mul8u::a#8 mul8u::a#2 mul8u::a#0 ]
-zp ZP_WORD:14 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 mul8s_compare::mf#0 mul8s_error::mf#0 mulf8u::return#2 mulf8u::return#0 mulf8u::return#3 mul8u_compare::mf#0 mul8u_error::mf#0 ]
+zp ZP_WORD:14 [ mulf8s::m#4 mulf8s::m#5 mulf8s::m#1 mulf8s::m#0 mulf8s::m#2 mulf8s::return#2 mulf8u::return#2 mul8s_compare::mf#0 mul8s_error::mf#0 mulf8u::return#0 mulf8u::return#3 mul8u_compare::mf#0 mul8u_error::mf#0 ]
 reg byte a [ mulf8u::a#2 mulf8u::a#1 mulf8u::a#4 ]
 reg byte x [ mulf8u::b#2 mulf8u::b#1 mulf8u::b#4 ]
 reg byte y [ muls8s::i#2 muls8s::i#1 ]

src/test/java/dk/camelot64/kickc/test/ref/voronoi.log

@@ -2600,9 +2600,9 @@ Attempting to uplift remaining variables inzp ZP_BYTE:20 [ findcol::x#0 ]
 Uplifting [findcol] best 1703953 combination zp ZP_BYTE:20 [ findcol::x#0 ] 
 Attempting to uplift remaining variables inzp ZP_BYTE:2 [ render::y#4 render::y#1 ]
 Uplifting [render] best 1703953 combination zp ZP_BYTE:2 [ render::y#4 render::y#1 ] 
-Coalescing zero page register [ zp ZP_BYTE:9 [ findcol::diff#4 findcol::diff#1 findcol::diff#0 ] ] with [ zp ZP_BYTE:24 [ findcol::xp#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:9 [ findcol::diff#4 findcol::diff#1 findcol::diff#0 ] ] with [ zp ZP_BYTE:24 [ findcol::xp#0 ] ] - score: 2
-Coalescing zero page register [ zp ZP_BYTE:2 [ render::y#4 render::y#1 ] ] with [ zp ZP_BYTE:21 [ findcol::y#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:2 [ render::y#4 render::y#1 ] ] with [ zp ZP_BYTE:21 [ findcol::y#0 ] ] - score: 1
-Coalescing zero page register [ zp ZP_BYTE:5 [ render::x#2 render::x#1 ] ] with [ zp ZP_BYTE:20 [ findcol::x#0 ] ]
+Coalescing zero page register with common assignment [ zp ZP_BYTE:5 [ render::x#2 render::x#1 ] ] with [ zp ZP_BYTE:20 [ findcol::x#0 ] ] - score: 1
 Coalescing zero page register [ zp ZP_WORD:3 [ render::colline#5 render::colline#1 ] ] with [ zp ZP_WORD:11 [ initscreen::screen#2 initscreen::screen#1 ] ]
 Allocated (was zp ZP_BYTE:7) zp ZP_BYTE:6 [ findcol::mindiff#10 findcol::mindiff#13 ]
 Allocated (was zp ZP_BYTE:9) zp ZP_BYTE:7 [ findcol::diff#4 findcol::diff#1 findcol::diff#0 findcol::xp#0 ]

src/test/java/dk/camelot64/kickc/test/ref/zpptr.log

@@ -584,7 +584,7 @@ Attempting to uplift remaining variables inzp ZP_BYTE:3 [ main::i#4 main::i#1 ]
 Uplifting [main] best 78433 combination zp ZP_BYTE:3 [ main::i#4 main::i#1 ] 
 Attempting to uplift remaining variables inzp ZP_BYTE:2 [ main::j#6 main::j#1 ]
 Uplifting [main] best 78433 combination zp ZP_BYTE:2 [ main::j#6 main::j#1 ] 
-Coalescing zero page register [ zp ZP_WORD:5 [ main::zpptr2#0 ] ] with [ zp ZP_WORD:9 [ main::zpptr2#1 ] ]
+Coalescing zero page register with common assignment [ zp ZP_WORD:5 [ main::zpptr2#0 ] ] with [ zp ZP_WORD:9 [ main::zpptr2#1 ] ] - score: 1
 Allocated (was zp ZP_WORD:5) zp ZP_WORD:4 [ main::zpptr2#0 main::zpptr2#1 ]
 Allocated (was zp ZP_WORD:7) zp ZP_WORD:6 [ main::w#0 ]