Working on #304, #305, #306.

2024-11-23 23:32:55 +00:00 · 2019-09-03 08:35:38 +02:00 · 2019-09-03 08:35:38 +02:00 · 42ecee2f94
commit 42ecee2f94
parent 162b29b2d4
11 changed files with 852 additions and 70 deletions
--- a/src/main/fragment/pbuc1_le_pbuc2_then_la1.asm
+++ b/src/main/fragment/pbuc1_le_pbuc2_then_la1.asm
@ -0,0 +1,8 @@
+lda #>{c1}
+cmp #>{c2}
+bne !+
+lda #<{c1}
+cmp #<{c2}
+beq {la1}
+!:
+bcc {la1}
--- a/src/main/fragment/pssz1=pssz2.asm
+++ b/src/main/fragment/pssz1=pssz2.asm
@ -0,0 +1,4 @@
+lda {z2}
+sta {z1}
+lda {z2}+1
+sta {z1}+1
--- a/src/main/java/dk/camelot64/kickc/model/VariableReferenceInfos.java
+++ b/src/main/java/dk/camelot64/kickc/model/VariableReferenceInfos.java
@ -1,12 +1,11 @@
 package dk.camelot64.kickc.model;

-import dk.camelot64.kickc.model.values.*;
 import dk.camelot64.kickc.model.statements.Statement;
+import dk.camelot64.kickc.model.values.*;
 import dk.camelot64.kickc.passes.calcs.PassNCalcVariableReferenceInfos;

-import java.util.Collection;
-import java.util.LinkedHashSet;
-import java.util.Map;
+import java.util.*;
+import java.util.stream.Collectors;

 /**
 * Cached information about which variables/constants are defined/referenced/used in which statements / blocks / symbols .
@ -24,11 +23,14 @@ public class VariableReferenceInfos {
   /** Variables used in each block. */
   private Map<LabelRef, Collection<VariableRef>> blockUsedVars;

-   /** Variables referenced in each statement. */
-   private Map<Integer, Collection<VariableRef>> stmtReferencedVars;
+   /** For each block this is the closure of all successor blocks. */
+   private Map<LabelRef, Collection<LabelRef>> blockSuccessorClosure;

-   /** Variables defined in each statement. */
-   private Map<Integer, Collection<VariableRef>> stmtDefinedVars;
+   /** References to variables/constants by block label. */
+   private Map<LabelRef, Collection<VariableReferenceInfos.ReferenceToSymbolVar>> blockVarReferences;
+
+   /** References to variables/constants by statement index. */
+   private Map<Integer, Collection<VariableReferenceInfos.ReferenceToSymbolVar>> statementVarReferences;

   /** All references to symbol variables (constants/variables). References can be either statements or symbols in the symbol table */
   private Map<SymbolVariableRef, Collection<ReferenceToSymbolVar>> symbolVarReferences;
@ -127,22 +129,30 @@ public class VariableReferenceInfos {
   public VariableReferenceInfos(
         Map<LabelRef, Collection<VariableRef>> blockReferencedVars,
         Map<LabelRef, Collection<VariableRef>> blockUsedVars,
-         Map<Integer, Collection<VariableRef>> stmtReferencedVars,
-         Map<Integer, Collection<VariableRef>> stmtDefinedVars,
-         Map<SymbolVariableRef, Collection<ReferenceToSymbolVar>> symbolVarReferences
-
+         Map<LabelRef, Collection<LabelRef>> blockSuccessorClosure,
+         Map<SymbolVariableRef, Collection<ReferenceToSymbolVar>> symbolVarReferences,
+         Map<LabelRef, Collection<VariableReferenceInfos.ReferenceToSymbolVar>> blockVarReferences,
+         Map<Integer, Collection<VariableReferenceInfos.ReferenceToSymbolVar>> statementVarReferences
   ) {
      this.blockReferencedVars = blockReferencedVars;
      this.blockUsedVars = blockUsedVars;
-      this.stmtDefinedVars = stmtDefinedVars;
-      this.stmtReferencedVars = stmtReferencedVars;
+      this.blockSuccessorClosure = blockSuccessorClosure;
      this.symbolVarReferences = symbolVarReferences;
-
+      this.blockVarReferences = blockVarReferences;
+      this.statementVarReferences = statementVarReferences;
   }

   public String getSizeInfo() {
      StringBuilder sizeInfo = new StringBuilder();
-      if(blockReferencedVars!=null) {
+      if(blockSuccessorClosure != null) {
+         sizeInfo.append("blockSuccessorClosure " + blockSuccessorClosure.size() + " labels ");
+         int sub = 0;
+         for(Collection<LabelRef> labelRefs : blockSuccessorClosure.values()) {
+            sub += labelRefs.size();
+         }
+         sizeInfo.append(" " + sub + " labels" + "\n");
+      }
+      if(blockReferencedVars != null) {
         sizeInfo.append("blockReferencedVars " + blockReferencedVars.size() + " labels ");
         int sub = 0;
         for(Collection<VariableRef> variableRefs : blockReferencedVars.values()) {
@ -150,7 +160,7 @@ public class VariableReferenceInfos {
         }
         sizeInfo.append(" " + sub + " varrefs" + "\n");
      }
-      if(blockUsedVars!=null) {
+      if(blockUsedVars != null) {
         sizeInfo.append("blockUsedVars " + blockUsedVars.size() + " labels ");
         int sub = 0;
         for(Collection<VariableRef> variableRefs : blockUsedVars.values()) {
@ -158,22 +168,6 @@ public class VariableReferenceInfos {
         }
         sizeInfo.append(" " + sub + " varrefs" + "\n");
      }
-      {
-         sizeInfo.append("stmtDefinedVars " + stmtDefinedVars.size() + " ints ");
-         int sub = 0;
-         for(Collection<VariableRef> variableRefs : stmtDefinedVars.values()) {
-            sub += variableRefs.size();
-         }
-         sizeInfo.append(" " + sub + " varrefs" + "\n");
-      }
-      {
-         sizeInfo.append("stmtReferencedVars " + stmtReferencedVars.size() + " ints ");
-         int sub = 0;
-         for(Collection<VariableRef> variableRefs : stmtReferencedVars.values()) {
-            sub += variableRefs.size();
-         }
-         sizeInfo.append(" " + sub + " varrefs" + "\n");
-      }
      {
         sizeInfo.append("symbolVarReferences " + symbolVarReferences.size() + " SymbolVariableRefs ");
         int sub = 0;
@ -182,6 +176,22 @@ public class VariableReferenceInfos {
         }
         sizeInfo.append(" " + sub + " ReferenceToSymbolVars" + "\n");
      }
+      {
+         sizeInfo.append("statementVarReferences " + statementVarReferences.size() + " statements ");
+         int sub = 0;
+         for(Collection<ReferenceToSymbolVar> value : statementVarReferences.values()) {
+            sub += value.size();
+         }
+         sizeInfo.append(" " + sub + " ReferenceToSymbolVars" + "\n");
+      }
+      {
+         sizeInfo.append("blockVarReferences " + blockVarReferences.size() + " blocks ");
+         int sub = 0;
+         for(Collection<ReferenceToSymbolVar> value : blockVarReferences.values()) {
+            sub += value.size();
+         }
+         sizeInfo.append(" " + sub + " ReferenceToSymbolVars" + "\n");
+      }
      return sizeInfo.toString();
   }

@ -222,30 +232,52 @@ public class VariableReferenceInfos {
    * @return Variables defined by the statement
    */
   public Collection<VariableRef> getDefinedVars(Statement stmt) {
-      return stmtDefinedVars.get(stmt.getIndex());
+      Collection<ReferenceToSymbolVar> referenceToSymbolVars = statementVarReferences.get(stmt.getIndex());
+      List<VariableRef> variableRefs = referenceToSymbolVars
+            .stream()
+            .filter(referenceToSymbolVar -> referenceToSymbolVar.getReferenced() instanceof VariableRef)
+            .filter(referenceToSymbolVar -> ReferenceToSymbolVar.ReferenceType.DEFINE.equals(referenceToSymbolVar.getReferenceType()))
+            .map(ReferenceToSymbolVar::getReferenced)
+            .map(symbolVariableRef -> (VariableRef) symbolVariableRef)
+            .collect(Collectors.toList());
+      return variableRefs;
   }

   /**
    * Get the variables referenced (used or defined) in a statement
    *
-    * @param statement The statement to examine
+    * @param stmt The statement to examine
    * @return The referenced variables
    */
-   public Collection<VariableRef> getReferencedVars(Statement statement) {
-      return stmtReferencedVars.get(statement.getIndex());
+   public Collection<VariableRef> getReferencedVars(Statement stmt) {
+      // Test if new structure is compatible
+      Collection<ReferenceToSymbolVar> referenceToSymbolVars = statementVarReferences.get(stmt.getIndex());
+      List<VariableRef> variableRefs =
+            referenceToSymbolVars
+                  .stream()
+                  .filter(referenceToSymbolVar -> referenceToSymbolVar.getReferenced() instanceof VariableRef)
+                  .map(ReferenceToSymbolVar::getReferenced)
+                  .map(symbolVariableRef -> (VariableRef)symbolVariableRef)
+                  .collect(Collectors.toList());
+      return variableRefs;
   }

   /**
    * Get the variables used, but not defined, in a statement
    *
-    * @param statement The statement to examine
+    * @param stmt The statement to examine
    * @return The used variables (not including defined variables)
    */
-   public Collection<VariableRef> getUsedVars(Statement statement) {
-      LinkedHashSet<VariableRef> used = new LinkedHashSet<>();
-      used.addAll(getReferencedVars(statement));
-      used.removeAll(getDefinedVars(statement));
-      return used;
+   public Collection<VariableRef> getUsedVars(Statement stmt) {
+      Collection<ReferenceToSymbolVar> referenceToSymbolVars = statementVarReferences.get(stmt.getIndex());
+      List<VariableRef> variableRefs = referenceToSymbolVars
+            .stream()
+            .filter(referenceToSymbolVar -> referenceToSymbolVar.getReferenced() instanceof VariableRef)
+            .filter(referenceToSymbolVar -> ReferenceToSymbolVar.ReferenceType.USE.equals(referenceToSymbolVar.getReferenceType()))
+            .map(ReferenceToSymbolVar::getReferenced)
+            .map(symbolVariableRef -> (VariableRef) symbolVariableRef)
+            .collect(Collectors.toList());
+      return variableRefs;
   }

   /**
@ -255,10 +287,9 @@ public class VariableReferenceInfos {
    */
   public boolean isUnused(SymbolVariableRef variableRef) {
      Collection<ReferenceToSymbolVar> refs = symbolVarReferences.get(variableRef);
-      if(refs==null) return true;
+      if(refs == null) return true;
      return !refs.stream()
-            .anyMatch(referenceToSymbolVar -> ReferenceToSymbolVar.ReferenceType.USE.equals(referenceToSymbolVar.getReferenceType())
-      );
+            .anyMatch(referenceToSymbolVar -> ReferenceToSymbolVar.ReferenceType.USE.equals(referenceToSymbolVar.getReferenceType()));
   }

   /**
@ -270,7 +301,7 @@ public class VariableReferenceInfos {
   public Collection<Integer> getConstRefStatements(ConstantRef constRef) {
      Collection<ReferenceToSymbolVar> refs = symbolVarReferences.get(constRef);
      LinkedHashSet<Integer> stmts = new LinkedHashSet<>();
-      if(refs!=null) {
+      if(refs != null) {
         refs.stream()
               .filter(referenceToSymbolVar -> referenceToSymbolVar instanceof ReferenceInStatement)
               .forEach(referenceToSymbolVar -> stmts.add(((ReferenceInStatement) referenceToSymbolVar).getStatementIdx()));
@ -287,7 +318,7 @@ public class VariableReferenceInfos {
   public Collection<Integer> getVarRefStatements(VariableRef varRef) {
      Collection<ReferenceToSymbolVar> refs = symbolVarReferences.get(varRef);
      LinkedHashSet<Integer> stmts = new LinkedHashSet<>();
-      if(refs!=null) {
+      if(refs != null) {
         refs.stream()
               .filter(referenceToSymbolVar -> referenceToSymbolVar instanceof ReferenceInStatement)
               .forEach(referenceToSymbolVar -> stmts.add(((ReferenceInStatement) referenceToSymbolVar).getStatementIdx()));
@ -304,7 +335,7 @@ public class VariableReferenceInfos {
   public Collection<Integer> getVarUseStatements(VariableRef varRef) {
      Collection<ReferenceToSymbolVar> refs = symbolVarReferences.get(varRef);
      LinkedHashSet<Integer> stmts = new LinkedHashSet<>();
-      if(refs!=null) {
+      if(refs != null) {
         refs.stream()
               .filter(referenceToSymbolVar -> referenceToSymbolVar instanceof ReferenceInStatement)
               .filter(referenceToSymbolVar -> ReferenceToSymbolVar.ReferenceType.USE == referenceToSymbolVar.getReferenceType())
@ -323,7 +354,7 @@ public class VariableReferenceInfos {
   public Collection<SymbolVariableRef> getSymbolRefConsts(ConstantRef constRef) {
      Collection<ReferenceToSymbolVar> refs = symbolVarReferences.get(constRef);
      LinkedHashSet<SymbolVariableRef> constRefs = new LinkedHashSet<>();
-      if(refs!=null) {
+      if(refs != null) {
         refs.stream()
               .filter(referenceToSymbolVar -> ReferenceToSymbolVar.ReferenceType.USE.equals(referenceToSymbolVar.getReferenceType()))
               .filter(referenceToSymbolVar -> referenceToSymbolVar instanceof ReferenceInSymbol)
--- a/src/main/java/dk/camelot64/kickc/passes/calcs/PassNCalcVariableReferenceInfos.java
+++ b/src/main/java/dk/camelot64/kickc/passes/calcs/PassNCalcVariableReferenceInfos.java
@ -5,7 +5,9 @@ import dk.camelot64.kickc.model.Program;
 import dk.camelot64.kickc.model.VariableReferenceInfos;
 import dk.camelot64.kickc.model.iterator.ProgramValue;
 import dk.camelot64.kickc.model.iterator.ProgramValueIterator;
-import dk.camelot64.kickc.model.statements.*;
+import dk.camelot64.kickc.model.statements.Statement;
+import dk.camelot64.kickc.model.statements.StatementLValue;
+import dk.camelot64.kickc.model.statements.StatementPhiBlock;
 import dk.camelot64.kickc.model.symbols.SymbolVariable;
 import dk.camelot64.kickc.model.values.*;

@ -27,14 +29,19 @@ public class PassNCalcVariableReferenceInfos extends PassNCalcBase<VariableRefer
   public VariableReferenceInfos calculate() {
      LinkedHashMap<LabelRef, Collection<VariableRef>> blockReferencedVars = new LinkedHashMap<>();
      LinkedHashMap<LabelRef, Collection<VariableRef>> blockUsedVars = new LinkedHashMap<>();
-      LinkedHashMap<Integer, Collection<VariableRef>> stmtReferenced = new LinkedHashMap<>();
-      LinkedHashMap<Integer, Collection<VariableRef>> stmtDefined = new LinkedHashMap<>();
+      LinkedHashMap<LabelRef, Collection<LabelRef>> blockSuccessors = new LinkedHashMap<>();
+
      Map<SymbolVariableRef, Collection<VariableReferenceInfos.ReferenceToSymbolVar>> symbolVarReferences = new LinkedHashMap<>();
+      Map<LabelRef, Collection<VariableReferenceInfos.ReferenceToSymbolVar>> blockVarReferences = new LinkedHashMap<>();
+      Map<Integer, Collection<VariableReferenceInfos.ReferenceToSymbolVar>> statementVarReferences = new LinkedHashMap<>();
+
      blockDirectVarRefsMap = new LinkedHashMap<>();
      blockDirectUsedVarsMap = new LinkedHashMap<>();
      for(ControlFlowBlock block : getProgram().getGraph().getAllBlocks()) {
         LinkedHashSet<VariableRef> blockDirectVarRefs = new LinkedHashSet<>();
         LinkedHashSet<VariableRef> blockDirectUsedVars = new LinkedHashSet<>();
+         blockVarReferences.putIfAbsent(block.getLabel(), new ArrayList<>());
+         Collection<VariableReferenceInfos.ReferenceToSymbolVar> blockSymbols = blockVarReferences.get(block.getLabel());
         for(Statement statement : block.getStatements()) {
            LinkedHashSet<SymbolVariableRef> stmtSymbolVarRefs = new LinkedHashSet<>();
            LinkedHashSet<VariableRef> stmtVarRefs = new LinkedHashSet<>();
@ -51,29 +58,29 @@ public class PassNCalcVariableReferenceInfos extends PassNCalcBase<VariableRefer
            stmtUsedVars.removeAll(stmtDefinedVars);
            blockDirectVarRefs.addAll(stmtVarRefs);
            blockDirectUsedVars.addAll(stmtUsedVars);
-
            // Add variable definitions to the statement
-            stmtDefined.put(statement.getIndex(), stmtDefinedVars);
+            statementVarReferences.putIfAbsent(statement.getIndex(), new ArrayList<>());
+            Collection<VariableReferenceInfos.ReferenceToSymbolVar> stmtSymbols = statementVarReferences.get(statement.getIndex());
            // Identify statement defining variables
            for(VariableRef variableRef : stmtDefinedVars) {
               symbolVarReferences.putIfAbsent(variableRef, new ArrayList<>());
-               Collection<VariableReferenceInfos.ReferenceToSymbolVar> references = symbolVarReferences.get(variableRef);
-               references.add(new VariableReferenceInfos.ReferenceInStatement(statement.getIndex(), VariableReferenceInfos.ReferenceToSymbolVar.ReferenceType.DEFINE, variableRef));
+               Collection<VariableReferenceInfos.ReferenceToSymbolVar> varReferences = symbolVarReferences.get(variableRef);
+               VariableReferenceInfos.ReferenceInStatement referenceInStmt = new VariableReferenceInfos.ReferenceInStatement(statement.getIndex(), VariableReferenceInfos.ReferenceToSymbolVar.ReferenceType.DEFINE, variableRef);
+               varReferences.add(referenceInStmt);
+               stmtSymbols.add(referenceInStmt);
+               if(!blockSymbols.contains(referenceInStmt)) blockSymbols.add(referenceInStmt);
            }
            // Gather statements referencing variables/constants
            for(SymbolVariableRef referencedVarRef : stmtSymbolVarRefs) {
               if(!stmtDefinedVars.contains(referencedVarRef)) {
                  symbolVarReferences.putIfAbsent(referencedVarRef, new ArrayList<>());
                  Collection<VariableReferenceInfos.ReferenceToSymbolVar> references = symbolVarReferences.get(referencedVarRef);
-                  references.add(
-                        new VariableReferenceInfos.ReferenceInStatement(
-                              statement.getIndex(),
-                              VariableReferenceInfos.ReferenceToSymbolVar.ReferenceType.USE,
-                              referencedVarRef));
+                  VariableReferenceInfos.ReferenceInStatement referenceInStmt = new VariableReferenceInfos.ReferenceInStatement(statement.getIndex(), VariableReferenceInfos.ReferenceToSymbolVar.ReferenceType.USE, referencedVarRef);
+                  references.add(referenceInStmt);
+                  stmtSymbols.add(referenceInStmt);
+                  if(!blockSymbols.contains(referenceInStmt)) blockSymbols.add(referenceInStmt);
               }
            }
-            // Add variable reference to the statement
-            stmtReferenced.put(statement.getIndex(), stmtVarRefs);
         }
         LabelRef blockLabel = block.getLabel();
         blockDirectVarRefsMap.put(blockLabel, blockDirectVarRefs);
@ -83,9 +90,12 @@ public class PassNCalcVariableReferenceInfos extends PassNCalcBase<VariableRefer
         LabelRef blockLabel = block.getLabel();
         LinkedHashSet<VariableRef> blockRecursiveVarRefs = new LinkedHashSet<>();
         LinkedHashSet<VariableRef> blockRecursiveUsedVars = new LinkedHashSet<>();
-         addReferencedVars(block.getLabel(), block, blockRecursiveVarRefs, blockRecursiveUsedVars, new ArrayList<>());
+         findReferencedVars(block.getLabel(), block, blockRecursiveVarRefs, blockRecursiveUsedVars, new ArrayList<>());
         blockReferencedVars.put(blockLabel, blockRecursiveVarRefs);
         blockUsedVars.put(blockLabel, blockRecursiveUsedVars);
+         LinkedHashSet<LabelRef> successorClosure = new LinkedHashSet<>();
+         findSuccessorClosure(block.getLabel(), successorClosure, new ArrayList<>());
+         blockSuccessors.put(blockLabel, successorClosure);
      }
      // Gather symbols in the symbol table referencing other variables/constants
      Collection<SymbolVariable> allSymbolVariables = getProgram().getScope().getAllSymbolVariables(true);
@ -101,7 +111,7 @@ public class PassNCalcVariableReferenceInfos extends PassNCalcBase<VariableRefer
                  }
               });
      }
-      VariableReferenceInfos variableReferenceInfos = new VariableReferenceInfos(blockReferencedVars, blockUsedVars, stmtReferenced, stmtDefined, symbolVarReferences);
+      VariableReferenceInfos variableReferenceInfos = new VariableReferenceInfos(blockReferencedVars, blockUsedVars, blockSuccessors, symbolVarReferences, blockVarReferences, statementVarReferences);
      if(getLog().isVerboseSSAOptimize()) {
         getLog().append(variableReferenceInfos.getSizeInfo());
      }
@ -165,7 +175,7 @@ public class PassNCalcVariableReferenceInfos extends PassNCalcBase<VariableRefer
    * @param usedVars the set of referenced variables
    * @param visited The blocks already visited during the search. Used to stop infinite recursion
    */
-   private void addReferencedVars(LabelRef labelRef, ControlFlowBlock block, LinkedHashSet<VariableRef> referencedVars, LinkedHashSet<VariableRef> usedVars, Collection<LabelRef> visited) {
+   private void findReferencedVars(LabelRef labelRef, ControlFlowBlock block, LinkedHashSet<VariableRef> referencedVars, LinkedHashSet<VariableRef> usedVars, Collection<LabelRef> visited) {
      if(labelRef == null || visited.contains(labelRef))
         return;
      visited.add(labelRef);
@ -176,11 +186,32 @@ public class PassNCalcVariableReferenceInfos extends PassNCalcBase<VariableRefer
      }
      referencedVars.addAll(blockDirectVarRefsMap.get(labelRef));
      usedVars.addAll(blockDirectUsedVarsMap.get(labelRef));
-      addReferencedVars(block.getDefaultSuccessor(), null, referencedVars, usedVars, visited);
-      addReferencedVars(block.getConditionalSuccessor(), null, referencedVars, usedVars, visited);
-      addReferencedVars(block.getCallSuccessor(), null, referencedVars, usedVars, visited);
+      findReferencedVars(block.getDefaultSuccessor(), null, referencedVars, usedVars, visited);
+      findReferencedVars(block.getConditionalSuccessor(), null, referencedVars, usedVars, visited);
+      findReferencedVars(block.getCallSuccessor(), null, referencedVars, usedVars, visited);
   }

+   /**
+    * Recursively get all blocks in the closure of successors & calls for a specific block
+    *
+    * @param labelRef The block to examine
+    * @param successorClosure the set of all blocks that are successors (including called methods).
+    * @param visited The blocks already visited during the search. Used to stop infinite recursion.
+    */
+   private void findSuccessorClosure(LabelRef labelRef, LinkedHashSet<LabelRef> successorClosure, Collection<LabelRef> visited) {
+      if(labelRef == null || visited.contains(labelRef))
+         return;
+      visited.add(labelRef);
+      ControlFlowBlock block = getProgram().getGraph().getBlock(labelRef);
+      if(block == null)
+         return;
+      successorClosure.add(labelRef);
+      findSuccessorClosure(block.getDefaultSuccessor(), successorClosure, visited);
+      findSuccessorClosure(block.getConditionalSuccessor(), successorClosure, visited);
+      findSuccessorClosure(block.getCallSuccessor(), successorClosure, visited);
+   }
+
+
   /**
    * Get the variables defined by a statement
    *
--- a/src/test/java/dk/camelot64/kickc/test/TestPrograms.java
+++ b/src/test/java/dk/camelot64/kickc/test/TestPrograms.java
@ -638,6 +638,16 @@ public class TestPrograms {
   }
   */

+   @Test
+   public void testStructPtr25() throws IOException, URISyntaxException {
+      compileAndCompare("struct-ptr-25");
+   }
+
+   @Test
+   public void testStructPtr24() throws IOException, URISyntaxException {
+      compileAndCompare("struct-ptr-24");
+   }
+
   /* TODO: Fix array of struct containing array https://gitlab.com/camelot/kickc/issues/274
   @Test
   public void testStructPtr23() throws IOException, URISyntaxException {
--- a/src/test/kc/struct-ptr-24.kc
+++ b/src/test/kc/struct-ptr-24.kc
@ -0,0 +1,23 @@
+typedef unsigned char BYTE;
+
+struct fileentry {
+    BYTE bFlag;
+    BYTE bError;
+};
+
+typedef struct fileentry ENTRY;
+
+ENTRY *filesEnd;
+ENTRY *dir;
+
+void main(){
+    ENTRY *file;
+    while(file != filesEnd){
+        PrintName(file);
+        ++file;
+    }
+}
+
+void PrintName(ENTRY *file) {
+    if (file == dir) *(BYTE *)0xC7 = 1;
+}
--- a/src/test/kc/struct-ptr-25.kc
+++ b/src/test/kc/struct-ptr-25.kc
@ -0,0 +1,10 @@
+char *fileCur;
+char *fileTop;
+char *filesEnd;
+char *file;
+
+void main(void) {
+    if (fileTop == filesEnd) --fileTop;
+    if (file <= fileCur) --fileCur;
+    if (fileCur < fileTop) fileCur = fileTop;
+}
--- a/src/test/ref/struct-ptr-24.asm
+++ b/src/test/ref/struct-ptr-24.asm
@ -0,0 +1,44 @@
+.pc = $801 "Basic"
+:BasicUpstart(main)
+.pc = $80d "Program"
+  .const SIZEOF_STRUCT_FILEENTRY = 2
+  .label filesEnd = 0
+  .label dir = 0
+main: {
+    .label file = 2
+    lda #<0
+    sta.z file
+    sta.z file+1
+  b1:
+    lda.z file+1
+    cmp #>filesEnd
+    bne b2
+    lda.z file
+    cmp #<filesEnd
+    bne b2
+    rts
+  b2:
+    jsr PrintName
+    lda #SIZEOF_STRUCT_FILEENTRY
+    clc
+    adc.z file
+    sta.z file
+    bcc !+
+    inc.z file+1
+  !:
+    jmp b1
+}
+// PrintName(struct fileentry* zeropage(2) file)
+PrintName: {
+    .label file = 2
+    lda.z file+1
+    cmp #>dir
+    bne breturn
+    lda.z file
+    cmp #<dir
+    bne breturn
+    lda #1
+    sta $c7
+  breturn:
+    rts
+}
--- a/src/test/ref/struct-ptr-24.cfg
+++ b/src/test/ref/struct-ptr-24.cfg
@ -0,0 +1,35 @@
+@begin: scope:[]  from
+  [0] phi()
+  to:@1
+@1: scope:[]  from @begin
+  [1] phi()
+  [2] call main 
+  to:@end
+@end: scope:[]  from @1
+  [3] phi()
+main: scope:[main]  from @1
+  [4] phi()
+  to:main::@1
+main::@1: scope:[main]  from main main::@3
+  [5] (struct fileentry*) main::file#2 ← phi( main/(struct fileentry*) 0 main::@3/(struct fileentry*) main::file#1 )
+  [6] if((struct fileentry*) main::file#2!=(const struct fileentry*) filesEnd#0) goto main::@2
+  to:main::@return
+main::@return: scope:[main]  from main::@1
+  [7] return 
+  to:@return
+main::@2: scope:[main]  from main::@1
+  [8] (struct fileentry*) PrintName::file#0 ← (struct fileentry*) main::file#2
+  [9] call PrintName 
+  to:main::@3
+main::@3: scope:[main]  from main::@2
+  [10] (struct fileentry*) main::file#1 ← (struct fileentry*) main::file#2 + (const byte) SIZEOF_STRUCT_FILEENTRY
+  to:main::@1
+PrintName: scope:[PrintName]  from main::@2
+  [11] if((struct fileentry*) PrintName::file#0!=(const struct fileentry*) dir#0) goto PrintName::@return
+  to:PrintName::@1
+PrintName::@1: scope:[PrintName]  from PrintName
+  [12] *((byte*) 199) ← (byte) 1
+  to:PrintName::@return
+PrintName::@return: scope:[PrintName]  from PrintName PrintName::@1
+  [13] return 
+  to:@return
--- a/src/test/ref/struct-ptr-24.log
+++ b/src/test/ref/struct-ptr-24.log
@ -0,0 +1,561 @@
+Fixing pointer increment (struct fileentry*) main::file ← ++ (struct fileentry*) main::file
+Identified constant variable (struct fileentry*) filesEnd
+Identified constant variable (struct fileentry*) dir
+Culled Empty Block (label) main::@4
+Culled Empty Block (label) main::@3
+Culled Empty Block (label) main::@5
+Culled Empty Block (label) main::@6
+Culled Empty Block (label) @1
+Culled Empty Block (label) PrintName::@1
+
+CONTROL FLOW GRAPH SSA
+@begin: scope:[]  from
+  (struct fileentry*) filesEnd#0 ← (struct fileentry*) 0
+  (struct fileentry*) dir#0 ← (struct fileentry*) 0
+  to:@2
+main: scope:[main]  from @2
+  (struct fileentry*) main::file#0 ← (struct fileentry*) 0
+  to:main::@1
+main::@1: scope:[main]  from main main::@7
+  (struct fileentry*) main::file#2 ← phi( main/(struct fileentry*) main::file#0 main::@7/(struct fileentry*) main::file#1 )
+  (bool~) main::$0 ← (struct fileentry*) main::file#2 != (struct fileentry*) filesEnd#0
+  if((bool~) main::$0) goto main::@2
+  to:main::@return
+main::@2: scope:[main]  from main::@1
+  (struct fileentry*) main::file#3 ← phi( main::@1/(struct fileentry*) main::file#2 )
+  (struct fileentry*) PrintName::file#0 ← (struct fileentry*) main::file#3
+  call PrintName 
+  to:main::@7
+main::@7: scope:[main]  from main::@2
+  (struct fileentry*) main::file#4 ← phi( main::@2/(struct fileentry*) main::file#3 )
+  (struct fileentry*) main::file#1 ← (struct fileentry*) main::file#4 + (const byte) SIZEOF_STRUCT_FILEENTRY
+  to:main::@1
+main::@return: scope:[main]  from main::@1
+  return 
+  to:@return
+PrintName: scope:[PrintName]  from main::@2
+  (struct fileentry*) PrintName::file#1 ← phi( main::@2/(struct fileentry*) PrintName::file#0 )
+  (bool~) PrintName::$0 ← (struct fileentry*) PrintName::file#1 == (struct fileentry*) dir#0
+  (bool~) PrintName::$1 ← ! (bool~) PrintName::$0
+  if((bool~) PrintName::$1) goto PrintName::@return
+  to:PrintName::@2
+PrintName::@2: scope:[PrintName]  from PrintName
+  (byte*~) PrintName::$2 ← ((byte*)) (number) $c7
+  *((byte*~) PrintName::$2) ← (number) 1
+  to:PrintName::@return
+PrintName::@return: scope:[PrintName]  from PrintName PrintName::@2
+  return 
+  to:@return
+@2: scope:[]  from @begin
+  call main 
+  to:@3
+@3: scope:[]  from @2
+  to:@end
+@end: scope:[]  from @3
+
+SYMBOL TABLE SSA
+(label) @2
+(label) @3
+(label) @begin
+(label) @end
+(void()) PrintName((struct fileentry*) PrintName::file)
+(bool~) PrintName::$0
+(bool~) PrintName::$1
+(byte*~) PrintName::$2
+(label) PrintName::@2
+(label) PrintName::@return
+(struct fileentry*) PrintName::file
+(struct fileentry*) PrintName::file#0
+(struct fileentry*) PrintName::file#1
+(const byte) SIZEOF_STRUCT_FILEENTRY = (byte) 2
+(struct fileentry*) dir
+(struct fileentry*) dir#0
+(byte) fileentry::bError
+(byte) fileentry::bFlag
+(struct fileentry*) filesEnd
+(struct fileentry*) filesEnd#0
+(void()) main()
+(bool~) main::$0
+(label) main::@1
+(label) main::@2
+(label) main::@7
+(label) main::@return
+(struct fileentry*) main::file
+(struct fileentry*) main::file#0
+(struct fileentry*) main::file#1
+(struct fileentry*) main::file#2
+(struct fileentry*) main::file#3
+(struct fileentry*) main::file#4
+
+Adding number conversion cast (unumber) 1 in *((byte*~) PrintName::$2) ← (number) 1
+Successful SSA optimization PassNAddNumberTypeConversions
+Inlining cast (byte*~) PrintName::$2 ← (byte*)(number) $c7
+Inlining cast *((byte*~) PrintName::$2) ← (unumber)(number) 1
+Successful SSA optimization Pass2InlineCast
+Simplifying constant pointer cast (byte*) 199
+Simplifying constant integer cast 1
+Successful SSA optimization PassNCastSimplification
+Finalized unsigned number type (byte) 1
+Successful SSA optimization PassNFinalizeNumberTypeConversions
+Inversing boolean not [14] (bool~) PrintName::$1 ← (struct fileentry*) PrintName::file#1 != (struct fileentry*) dir#0 from [13] (bool~) PrintName::$0 ← (struct fileentry*) PrintName::file#1 == (struct fileentry*) dir#0
+Successful SSA optimization Pass2UnaryNotSimplification
+Alias (struct fileentry*) main::file#2 = (struct fileentry*) main::file#3 (struct fileentry*) main::file#4 
+Successful SSA optimization Pass2AliasElimination
+Identical Phi Values (struct fileentry*) PrintName::file#1 (struct fileentry*) PrintName::file#0
+Successful SSA optimization Pass2IdenticalPhiElimination
+Simple Condition (bool~) main::$0 [5] if((struct fileentry*) main::file#2!=(struct fileentry*) filesEnd#0) goto main::@2
+Simple Condition (bool~) PrintName::$1 [15] if((struct fileentry*) PrintName::file#0!=(struct fileentry*) dir#0) goto PrintName::@return
+Successful SSA optimization Pass2ConditionalJumpSimplification
+Constant (const struct fileentry*) filesEnd#0 = (struct fileentry*) 0
+Constant (const struct fileentry*) dir#0 = (struct fileentry*) 0
+Constant (const struct fileentry*) main::file#0 = (struct fileentry*) 0
+Constant (const byte*) PrintName::$2 = (byte*) 199
+Successful SSA optimization Pass2ConstantIdentification
+Inlining constant with var siblings (const struct fileentry*) main::file#0
+Constant inlined PrintName::$2 = (byte*) 199
+Constant inlined main::file#0 = (struct fileentry*) 0
+Successful SSA optimization Pass2ConstantInlining
+Adding NOP phi() at start of @begin
+Adding NOP phi() at start of @2
+Adding NOP phi() at start of @3
+Adding NOP phi() at start of @end
+Adding NOP phi() at start of main
+CALL GRAPH
+Calls in [] to main:2 
+Calls in [main] to PrintName:10 
+
+Created 1 initial phi equivalence classes
+Coalesced [12] main::file#5 ← main::file#1
+Coalesced down to 1 phi equivalence classes
+Culled Empty Block (label) @3
+Renumbering block @2 to @1
+Renumbering block main::@7 to main::@3
+Renumbering block PrintName::@2 to PrintName::@1
+Adding NOP phi() at start of @begin
+Adding NOP phi() at start of @1
+Adding NOP phi() at start of @end
+Adding NOP phi() at start of main
+
+FINAL CONTROL FLOW GRAPH
+@begin: scope:[]  from
+  [0] phi()
+  to:@1
+@1: scope:[]  from @begin
+  [1] phi()
+  [2] call main 
+  to:@end
+@end: scope:[]  from @1
+  [3] phi()
+main: scope:[main]  from @1
+  [4] phi()
+  to:main::@1
+main::@1: scope:[main]  from main main::@3
+  [5] (struct fileentry*) main::file#2 ← phi( main/(struct fileentry*) 0 main::@3/(struct fileentry*) main::file#1 )
+  [6] if((struct fileentry*) main::file#2!=(const struct fileentry*) filesEnd#0) goto main::@2
+  to:main::@return
+main::@return: scope:[main]  from main::@1
+  [7] return 
+  to:@return
+main::@2: scope:[main]  from main::@1
+  [8] (struct fileentry*) PrintName::file#0 ← (struct fileentry*) main::file#2
+  [9] call PrintName 
+  to:main::@3
+main::@3: scope:[main]  from main::@2
+  [10] (struct fileentry*) main::file#1 ← (struct fileentry*) main::file#2 + (const byte) SIZEOF_STRUCT_FILEENTRY
+  to:main::@1
+PrintName: scope:[PrintName]  from main::@2
+  [11] if((struct fileentry*) PrintName::file#0!=(const struct fileentry*) dir#0) goto PrintName::@return
+  to:PrintName::@1
+PrintName::@1: scope:[PrintName]  from PrintName
+  [12] *((byte*) 199) ← (byte) 1
+  to:PrintName::@return
+PrintName::@return: scope:[PrintName]  from PrintName PrintName::@1
+  [13] return 
+  to:@return
+
+
+VARIABLE REGISTER WEIGHTS
+(void()) PrintName((struct fileentry*) PrintName::file)
+(struct fileentry*) PrintName::file
+(struct fileentry*) PrintName::file#0 13.0
+(struct fileentry*) dir
+(byte) fileentry::bError
+(byte) fileentry::bFlag
+(struct fileentry*) filesEnd
+(void()) main()
+(struct fileentry*) main::file
+(struct fileentry*) main::file#1 22.0
+(struct fileentry*) main::file#2 11.0
+
+Initial phi equivalence classes
+[ main::file#2 main::file#1 ]
+Added variable PrintName::file#0 to zero page equivalence class [ PrintName::file#0 ]
+Complete equivalence classes
+[ main::file#2 main::file#1 ]
+[ PrintName::file#0 ]
+Allocated zp ZP_WORD:2 [ main::file#2 main::file#1 ]
+Allocated zp ZP_WORD:4 [ PrintName::file#0 ]
+
+INITIAL ASM
+Target platform is c64basic
+  // File Comments
+  // Upstart
+.pc = $801 "Basic"
+:BasicUpstart(bbegin)
+.pc = $80d "Program"
+  // Global Constants & labels
+  .const SIZEOF_STRUCT_FILEENTRY = 2
+  .label filesEnd = 0
+  .label dir = 0
+  // @begin
+bbegin:
+  // [1] phi from @begin to @1 [phi:@begin->@1]
+b1_from_bbegin:
+  jmp b1
+  // @1
+b1:
+  // [2] call main 
+  // [4] phi from @1 to main [phi:@1->main]
+main_from_b1:
+  jsr main
+  // [3] phi from @1 to @end [phi:@1->@end]
+bend_from_b1:
+  jmp bend
+  // @end
+bend:
+  // main
+main: {
+    .label file = 2
+    // [5] phi from main to main::@1 [phi:main->main::@1]
+  b1_from_main:
+    // [5] phi (struct fileentry*) main::file#2 = (struct fileentry*) 0 [phi:main->main::@1#0] -- pssz1=pssc1 
+    lda #<0
+    sta.z file
+    lda #>0
+    sta.z file+1
+    jmp b1
+    // main::@1
+  b1:
+    // [6] if((struct fileentry*) main::file#2!=(const struct fileentry*) filesEnd#0) goto main::@2 -- pssz1_neq_pssc1_then_la1 
+    lda.z file+1
+    cmp #>filesEnd
+    bne b2
+    lda.z file
+    cmp #<filesEnd
+    bne b2
+    jmp breturn
+    // main::@return
+  breturn:
+    // [7] return 
+    rts
+    // main::@2
+  b2:
+    // [8] (struct fileentry*) PrintName::file#0 ← (struct fileentry*) main::file#2 -- pssz1=pssz2 
+    lda.z file
+    sta.z PrintName.file
+    lda.z file+1
+    sta.z PrintName.file+1
+    // [9] call PrintName 
+    jsr PrintName
+    jmp b3
+    // main::@3
+  b3:
+    // [10] (struct fileentry*) main::file#1 ← (struct fileentry*) main::file#2 + (const byte) SIZEOF_STRUCT_FILEENTRY -- pssz1=pssz1_plus_vbuc1 
+    lda #SIZEOF_STRUCT_FILEENTRY
+    clc
+    adc.z file
+    sta.z file
+    bcc !+
+    inc.z file+1
+  !:
+    // [5] phi from main::@3 to main::@1 [phi:main::@3->main::@1]
+  b1_from_b3:
+    // [5] phi (struct fileentry*) main::file#2 = (struct fileentry*) main::file#1 [phi:main::@3->main::@1#0] -- register_copy 
+    jmp b1
+}
+  // PrintName
+// PrintName(struct fileentry* zeropage(4) file)
+PrintName: {
+    .label file = 4
+    // [11] if((struct fileentry*) PrintName::file#0!=(const struct fileentry*) dir#0) goto PrintName::@return -- pssz1_neq_pssc1_then_la1 
+    lda.z file+1
+    cmp #>dir
+    bne breturn
+    lda.z file
+    cmp #<dir
+    bne breturn
+    jmp b1
+    // PrintName::@1
+  b1:
+    // [12] *((byte*) 199) ← (byte) 1 -- _deref_pbuc1=vbuc2 
+    lda #1
+    sta $c7
+    jmp breturn
+    // PrintName::@return
+  breturn:
+    // [13] return 
+    rts
+}
+  // File Data
+
+REGISTER UPLIFT POTENTIAL REGISTERS
+Statement [6] if((struct fileentry*) main::file#2!=(const struct fileentry*) filesEnd#0) goto main::@2 [ main::file#2 ] ( main:2 [ main::file#2 ] ) always clobbers reg byte a 
+Statement [8] (struct fileentry*) PrintName::file#0 ← (struct fileentry*) main::file#2 [ main::file#2 PrintName::file#0 ] ( main:2 [ main::file#2 PrintName::file#0 ] ) always clobbers reg byte a 
+Statement [10] (struct fileentry*) main::file#1 ← (struct fileentry*) main::file#2 + (const byte) SIZEOF_STRUCT_FILEENTRY [ main::file#1 ] ( main:2 [ main::file#1 ] ) always clobbers reg byte a 
+Statement [11] if((struct fileentry*) PrintName::file#0!=(const struct fileentry*) dir#0) goto PrintName::@return [ ] ( main:2::PrintName:9 [ main::file#2 ] ) always clobbers reg byte a 
+Statement [12] *((byte*) 199) ← (byte) 1 [ ] ( main:2::PrintName:9 [ main::file#2 ] ) always clobbers reg byte a 
+Potential registers zp ZP_WORD:2 [ main::file#2 main::file#1 ] : zp ZP_WORD:2 , 
+Potential registers zp ZP_WORD:4 [ PrintName::file#0 ] : zp ZP_WORD:4 , 
+
+REGISTER UPLIFT SCOPES
+Uplift Scope [main] 33: zp ZP_WORD:2 [ main::file#2 main::file#1 ] 
+Uplift Scope [PrintName] 13: zp ZP_WORD:4 [ PrintName::file#0 ] 
+Uplift Scope [fileentry] 
+Uplift Scope [] 
+
+Uplifting [main] best 776 combination zp ZP_WORD:2 [ main::file#2 main::file#1 ] 
+Uplifting [PrintName] best 776 combination zp ZP_WORD:4 [ PrintName::file#0 ] 
+Uplifting [fileentry] best 776 combination 
+Uplifting [] best 776 combination 
+Coalescing zero page register [ zp ZP_WORD:2 [ main::file#2 main::file#1 ] ] with [ zp ZP_WORD:4 [ PrintName::file#0 ] ] - score: 1
+
+ASSEMBLER BEFORE OPTIMIZATION
+  // File Comments
+  // Upstart
+.pc = $801 "Basic"
+:BasicUpstart(bbegin)
+.pc = $80d "Program"
+  // Global Constants & labels
+  .const SIZEOF_STRUCT_FILEENTRY = 2
+  .label filesEnd = 0
+  .label dir = 0
+  // @begin
+bbegin:
+  // [1] phi from @begin to @1 [phi:@begin->@1]
+b1_from_bbegin:
+  jmp b1
+  // @1
+b1:
+  // [2] call main 
+  // [4] phi from @1 to main [phi:@1->main]
+main_from_b1:
+  jsr main
+  // [3] phi from @1 to @end [phi:@1->@end]
+bend_from_b1:
+  jmp bend
+  // @end
+bend:
+  // main
+main: {
+    .label file = 2
+    // [5] phi from main to main::@1 [phi:main->main::@1]
+  b1_from_main:
+    // [5] phi (struct fileentry*) main::file#2 = (struct fileentry*) 0 [phi:main->main::@1#0] -- pssz1=pssc1 
+    lda #<0
+    sta.z file
+    lda #>0
+    sta.z file+1
+    jmp b1
+    // main::@1
+  b1:
+    // [6] if((struct fileentry*) main::file#2!=(const struct fileentry*) filesEnd#0) goto main::@2 -- pssz1_neq_pssc1_then_la1 
+    lda.z file+1
+    cmp #>filesEnd
+    bne b2
+    lda.z file
+    cmp #<filesEnd
+    bne b2
+    jmp breturn
+    // main::@return
+  breturn:
+    // [7] return 
+    rts
+    // main::@2
+  b2:
+    // [8] (struct fileentry*) PrintName::file#0 ← (struct fileentry*) main::file#2
+    // [9] call PrintName 
+    jsr PrintName
+    jmp b3
+    // main::@3
+  b3:
+    // [10] (struct fileentry*) main::file#1 ← (struct fileentry*) main::file#2 + (const byte) SIZEOF_STRUCT_FILEENTRY -- pssz1=pssz1_plus_vbuc1 
+    lda #SIZEOF_STRUCT_FILEENTRY
+    clc
+    adc.z file
+    sta.z file
+    bcc !+
+    inc.z file+1
+  !:
+    // [5] phi from main::@3 to main::@1 [phi:main::@3->main::@1]
+  b1_from_b3:
+    // [5] phi (struct fileentry*) main::file#2 = (struct fileentry*) main::file#1 [phi:main::@3->main::@1#0] -- register_copy 
+    jmp b1
+}
+  // PrintName
+// PrintName(struct fileentry* zeropage(2) file)
+PrintName: {
+    .label file = 2
+    // [11] if((struct fileentry*) PrintName::file#0!=(const struct fileentry*) dir#0) goto PrintName::@return -- pssz1_neq_pssc1_then_la1 
+    lda.z file+1
+    cmp #>dir
+    bne breturn
+    lda.z file
+    cmp #<dir
+    bne breturn
+    jmp b1
+    // PrintName::@1
+  b1:
+    // [12] *((byte*) 199) ← (byte) 1 -- _deref_pbuc1=vbuc2 
+    lda #1
+    sta $c7
+    jmp breturn
+    // PrintName::@return
+  breturn:
+    // [13] return 
+    rts
+}
+  // File Data
+
+ASSEMBLER OPTIMIZATIONS
+Removing instruction jmp b1
+Removing instruction jmp bend
+Removing instruction jmp b1
+Removing instruction jmp breturn
+Removing instruction jmp b3
+Removing instruction jmp b1
+Removing instruction jmp breturn
+Succesful ASM optimization Pass5NextJumpElimination
+Removing instruction lda #>0
+Succesful ASM optimization Pass5UnnecesaryLoadElimination
+Removing instruction b1_from_bbegin:
+Removing instruction b1:
+Removing instruction main_from_b1:
+Removing instruction bend_from_b1:
+Succesful ASM optimization Pass5RedundantLabelElimination
+Removing instruction bend:
+Removing instruction b1_from_main:
+Removing instruction breturn:
+Removing instruction b3:
+Removing instruction b1_from_b3:
+Removing instruction b1:
+Succesful ASM optimization Pass5UnusedLabelElimination
+Updating BasicUpstart to call main directly
+Removing instruction jsr main
+Succesful ASM optimization Pass5SkipBegin
+Removing instruction bbegin:
+Succesful ASM optimization Pass5UnusedLabelElimination
+
+FINAL SYMBOL TABLE
+(label) @1
+(label) @begin
+(label) @end
+(void()) PrintName((struct fileentry*) PrintName::file)
+(label) PrintName::@1
+(label) PrintName::@return
+(struct fileentry*) PrintName::file
+(struct fileentry*) PrintName::file#0 file zp ZP_WORD:2 13.0
+(const byte) SIZEOF_STRUCT_FILEENTRY SIZEOF_STRUCT_FILEENTRY = (byte) 2
+(struct fileentry*) dir
+(const struct fileentry*) dir#0 dir = (struct fileentry*) 0
+(byte) fileentry::bError
+(byte) fileentry::bFlag
+(struct fileentry*) filesEnd
+(const struct fileentry*) filesEnd#0 filesEnd = (struct fileentry*) 0
+(void()) main()
+(label) main::@1
+(label) main::@2
+(label) main::@3
+(label) main::@return
+(struct fileentry*) main::file
+(struct fileentry*) main::file#1 file zp ZP_WORD:2 22.0
+(struct fileentry*) main::file#2 file zp ZP_WORD:2 11.0
+
+zp ZP_WORD:2 [ main::file#2 main::file#1 PrintName::file#0 ]
+
+
+FINAL ASSEMBLER
+Score: 528
+
+  // File Comments
+  // Upstart
+.pc = $801 "Basic"
+:BasicUpstart(main)
+.pc = $80d "Program"
+  // Global Constants & labels
+  .const SIZEOF_STRUCT_FILEENTRY = 2
+  .label filesEnd = 0
+  .label dir = 0
+  // @begin
+  // [1] phi from @begin to @1 [phi:@begin->@1]
+  // @1
+  // [2] call main 
+  // [4] phi from @1 to main [phi:@1->main]
+  // [3] phi from @1 to @end [phi:@1->@end]
+  // @end
+  // main
+main: {
+    .label file = 2
+    // [5] phi from main to main::@1 [phi:main->main::@1]
+    // [5] phi (struct fileentry*) main::file#2 = (struct fileentry*) 0 [phi:main->main::@1#0] -- pssz1=pssc1 
+    lda #<0
+    sta.z file
+    sta.z file+1
+    // main::@1
+  b1:
+    // while(file != filesEnd)
+    // [6] if((struct fileentry*) main::file#2!=(const struct fileentry*) filesEnd#0) goto main::@2 -- pssz1_neq_pssc1_then_la1 
+    lda.z file+1
+    cmp #>filesEnd
+    bne b2
+    lda.z file
+    cmp #<filesEnd
+    bne b2
+    // main::@return
+    // }
+    // [7] return 
+    rts
+    // main::@2
+  b2:
+    // PrintName(file)
+    // [8] (struct fileentry*) PrintName::file#0 ← (struct fileentry*) main::file#2
+    // [9] call PrintName 
+    jsr PrintName
+    // main::@3
+    // ++file;
+    // [10] (struct fileentry*) main::file#1 ← (struct fileentry*) main::file#2 + (const byte) SIZEOF_STRUCT_FILEENTRY -- pssz1=pssz1_plus_vbuc1 
+    lda #SIZEOF_STRUCT_FILEENTRY
+    clc
+    adc.z file
+    sta.z file
+    bcc !+
+    inc.z file+1
+  !:
+    // [5] phi from main::@3 to main::@1 [phi:main::@3->main::@1]
+    // [5] phi (struct fileentry*) main::file#2 = (struct fileentry*) main::file#1 [phi:main::@3->main::@1#0] -- register_copy 
+    jmp b1
+}
+  // PrintName
+// PrintName(struct fileentry* zeropage(2) file)
+PrintName: {
+    .label file = 2
+    // if (file == dir)
+    // [11] if((struct fileentry*) PrintName::file#0!=(const struct fileentry*) dir#0) goto PrintName::@return -- pssz1_neq_pssc1_then_la1 
+    lda.z file+1
+    cmp #>dir
+    bne breturn
+    lda.z file
+    cmp #<dir
+    bne breturn
+    // PrintName::@1
+    // *(BYTE *)0xC7 = 1
+    // [12] *((byte*) 199) ← (byte) 1 -- _deref_pbuc1=vbuc2 
+    lda #1
+    sta $c7
+    // PrintName::@return
+  breturn:
+    // }
+    // [13] return 
+    rts
+}
+  // File Data
+
--- a/src/test/ref/struct-ptr-24.sym
+++ b/src/test/ref/struct-ptr-24.sym
@ -0,0 +1,25 @@
+(label) @1
+(label) @begin
+(label) @end
+(void()) PrintName((struct fileentry*) PrintName::file)
+(label) PrintName::@1
+(label) PrintName::@return
+(struct fileentry*) PrintName::file
+(struct fileentry*) PrintName::file#0 file zp ZP_WORD:2 13.0
+(const byte) SIZEOF_STRUCT_FILEENTRY SIZEOF_STRUCT_FILEENTRY = (byte) 2
+(struct fileentry*) dir
+(const struct fileentry*) dir#0 dir = (struct fileentry*) 0
+(byte) fileentry::bError
+(byte) fileentry::bFlag
+(struct fileentry*) filesEnd
+(const struct fileentry*) filesEnd#0 filesEnd = (struct fileentry*) 0
+(void()) main()
+(label) main::@1
+(label) main::@2
+(label) main::@3
+(label) main::@return
+(struct fileentry*) main::file
+(struct fileentry*) main::file#1 file zp ZP_WORD:2 22.0
+(struct fileentry*) main::file#2 file zp ZP_WORD:2 11.0
+
+zp ZP_WORD:2 [ main::file#2 main::file#1 PrintName::file#0 ]