Merged 181-type-system

src/main/fragment/_deref__deref_pptc1=vbuaa.asm

@@ -0,0 +1,2 @@
+ldy #0
+sta ({c1}),y

src/main/fragment/_deref__deref_pptz1=pbuc1_derefidx_vbuxx.asm

@@ -0,0 +1,5 @@
+ldy #0
+lda {z1}
+sta !+ +1
+lda {c1},x
+!: sta ($ff),y

src/main/fragment/_deref__deref_pptz1=vbuaa.asm

@@ -0,0 +1,4 @@
+ldy {z1}
+sty !+ +1
+ldy #0
+!: sta ($ff),y

src/main/fragment/_deref_pduc1=vduz1.asm

@@ -0,0 +1,8 @@
+lda {z1}
+sta {c1}
+lda {z1}+1
+sta {c1}+1
+lda {z1}+2
+sta {c1}+2
+lda {z1}+3
+sta {c1}+3

src/main/fragment/_deref_pptc1=_inc__deref_pptc1.asm

@@ -0,0 +1,4 @@
+inc {c1}
+bne !+
+inc {c1}+1
+!:

src/main/fragment/_deref_pptc1=pbuz1.asm

@@ -0,0 +1,4 @@
+lda {z1}
+sta {c1}
+lda {z1}+1
+sta {c1}+1

src/main/fragment/_deref_pptz1=_inc__deref_pptz1.asm

@@ -0,0 +1,5 @@
+ldy #0
+lda ({z1}),y
+clc
+adc #1
+sta ({z1}),y

src/main/fragment/pbuz1=_ptr_vwuz2.asm

@@ -0,0 +1,4 @@
+lda {z2}
+sta {z1}
+lda {z2}+1
+sta {z1}+1

src/main/fragment/pptz1_derefidx_vbuc1=pbuz2.asm

@@ -0,0 +1,6 @@
+ldy #{c1}
+lda {z2}
+sta ({z1}),y
+iny
+lda {z2}+1
+sta ({z1}),y

src/main/fragment/pptz1_derefidx_vbuc1=pwuz2.asm

@@ -0,0 +1,6 @@
+ldy #{c1}
+lda {z2}
+sta ({z1}),y
+iny
+lda {z2}+1
+sta ({z1}),y

src/main/fragment/pptz1_derefidx_vbuyy=pbuz2.asm

@@ -0,0 +1,5 @@
+lda {z2}
+sta ({z1}),y
+iny
+lda {z2}+1
+sta ({z1}),y

src/main/fragment/pptz1_derefidx_vbuyy=pwuz2.asm

@@ -0,0 +1,5 @@
+lda {z2}
+sta ({z1}),y
+iny
+lda {z2}+1
+sta ({z1}),y

src/main/fragment/pssc1_derefidx_vbuxx_mbr_0=vbuaa.asm

@@ -0,0 +1,2 @@
+sta {c1},x
+

src/main/fragment/pssc1_derefidx_vbuxx_mbr_1=vbuaa.asm

@@ -0,0 +1,2 @@
+sta {c1}+1,x
+

src/main/fragment/pssc1_derefidx_vbuyy_mbr_0=vbuaa.asm

@@ -0,0 +1,2 @@
+sta {c1},y
+

src/main/fragment/pssc1_derefidx_vbuyy_mbr_1=vbuaa.asm

@@ -0,0 +1,2 @@
+sta {c1}+1,y
+

src/main/fragment/pwsc1_derefidx_vbuxx=pwsc1_derefidx_vbuxx_minus_vwsz1.asm

@@ -0,0 +1,7 @@
+lda {c1},x
+sec
+sbc {z1}
+sta {c1},x
+lda {c1}+1,x
+sbc {z1}+1
+sta {c1}+1,x

src/main/fragment/pwsc1_derefidx_vbuxx=vwsz1.asm

@@ -0,0 +1,4 @@
+lda {z1}
+sta {c1},x
+lda {z1}+1
+sta {c1}+1,x

src/main/fragment/pwsc1_derefidx_vbuyy=pwsc1_derefidx_vbuyy_minus_vwsz1.asm

@@ -0,0 +1,7 @@
+lda {c1},y
+sec
+sbc {z1}
+sta {c1},y
+lda {c1}+1,y
+sbc {z1}+1
+sta {c1}+1,y

src/main/fragment/pwsc1_derefidx_vbuyy=vwsz1.asm

@@ -0,0 +1,4 @@
+lda {z1}
+sta {c1},y
+lda {z1}+1
+sta {c1}+1,y

src/main/fragment/pwuc1_derefidx_vbuxx_le_vwuz1_then_la1.asm

@@ -0,0 +1,8 @@
+lda {c1}+1,x
+cmp {z1}+1
+bne !+
+lda {c1},x
+cmp {z1}
+beq {la1}
+!:
+bcc {la1}

src/main/fragment/pwuc1_derefidx_vbuyy=vbuaa.asm

@@ -0,0 +1,3 @@
+sta {c1},y
+lda #0
+sta {c1}+1,y

src/main/fragment/pwuc1_derefidx_vbuyy_le_vwuz1_then_la1.asm

@@ -0,0 +1,8 @@
+lda {c1}+1,y
+cmp {z1}+1
+bne !+
+lda {c1},y
+cmp {z1}
+beq {la1}
+!:
+bcc {la1}

src/main/fragment/vbsaa=_neg__sbyte_vbuaa.asm

@@ -0,0 +1,3 @@
+eor #$ff
+clc
+adc #$01

src/main/fragment/vbsaa_lt_vbsc1_then_la1.asm

@@ -0,0 +1,6 @@
+sec
+sbc #{c1}
+bvc !+
+eor #$80
+!:
+bmi {la1}

src/main/fragment/vbuaa=_deref_pssc1_mbr_0.asm

@@ -0,0 +1 @@
+lda {c1}

src/main/fragment/vbuaa=_deref_pssc1_mbr_1.asm

@@ -0,0 +1 @@
+lda {c1}+1

src/main/fragment/vbuaa=pssc1_derefidx_vbuxx_mbr_0.asm

@@ -0,0 +1 @@
+lda {c1},x

src/main/fragment/vbuaa=pssc1_derefidx_vbuxx_mbr_1.asm

@@ -0,0 +1 @@
+lda {c1}+1,x

src/main/fragment/vbuaa=pssc1_derefidx_vbuyy_mbr_0.asm

@@ -0,0 +1 @@
+lda {c1},y

src/main/fragment/vbuaa=pssc1_derefidx_vbuyy_mbr_1.asm

@@ -0,0 +1 @@
+lda {c1}+1,y

src/main/fragment/vbuaa_le_0_then_la1.asm

@@ -0,0 +1,2 @@
+cmp #0
+beq {la1}

src/main/fragment/vbuxx_le_0_then_la1.asm

@@ -0,0 +1,2 @@
+cpx #0
+beq {la1}

src/main/fragment/vbuyy_le_0_then_la1.asm

@@ -0,0 +1,2 @@
+cpy #0
+beq {la1}

src/main/fragment/vduz1=_dword_vbuaa.asm

@@ -0,0 +1,5 @@
+sta {z1}
+lda #0
+sta {z1}+1
+sta {z1}+2
+sta {z1}+3

src/main/fragment/vduz1=vduc1_plus_vduz2.asm

@@ -0,0 +1,13 @@
+lda {z2}
+clc
+adc #<{c1}
+sta {z1}
+lda {z2}+1
+adc #>{c1}
+sta {z1}+1
+lda {z2}+2
+adc #0
+sta {z1}+2
+lda {z2}+3
+adc #0
+sta {z1}+3

src/main/fragment/vduz1=vduz1_plus_vduz2.asm

@@ -10,5 +10,4 @@ adc {z2}+2
 sta {z1}+2
 lda {z1}+3
 adc {z2}+3
-sta {z1}+3
-
+sta {z1}+3

src/main/fragment/vduz1=vduz2_plus_vwuc1.asm

@@ -10,5 +10,4 @@ adc #0
 sta {z1}+2
 lda {z2}+3
 adc #0
-sta {z1}+3
-
+sta {z1}+3

src/main/fragment/vduz1=vwuz2.asm

@@ -0,0 +1,7 @@
+lda {z2}
+sta {z1}
+lda {z2}+1
+sta {z1}+1
+lda #0
+sta {z1}+2
+sta {z1}+3

src/main/fragment/vduz1=vwuz2_dword_vbuc1.asm

@@ -1,8 +1,8 @@
-lda #<{c1}
-sta {z1}
-lda #>{c1}
-sta {z1}+1
 lda {z2}
 sta {z1}+2
 lda {z2}+1
 sta {z1}+3
+lda #{c1}
+sta {z1}
+lda #0
+sta {z1}+1

src/main/fragment/vduz1=vwuz2_dword_vwuc1.asm

@@ -0,0 +1,8 @@
+lda #<{c1}
+sta {z1}
+lda #>{c1}
+sta {z1}+1
+lda {z2}
+sta {z1}+2
+lda {z2}+1
+sta {z1}+3

src/main/fragment/vssz1=vssf2.asm

@@ -0,0 +1,3 @@
+lda #0
+sta {z1}
+sta {z1}+1

src/main/fragment/vssz1=vssz2.asm

@@ -0,0 +1,4 @@
+lda {z2}
+sta {z1}
+lda {z2}+1
+sta {z1}+1

src/main/fragment/vwsz1=_sword_vbuaa.asm

@@ -0,0 +1,3 @@
+sta {z1}
+lda #0
+sta {z1}+1

src/main/fragment/vwsz1=vbsaa_plus_vwsc1.asm

@@ -0,0 +1,11 @@
+tax
+clc
+adc #<{c1}
+sta {z1}
+txa
+ora #$7f
+bmi !+
+lda #0
+!:
+adc #>{c1}
+sta {z1}+1

src/main/fragment/vwsz1=vwsz2_minus_vbsc1.asm

@@ -0,0 +1,7 @@
+lda {z2}
+sec
+sbc #{c1}
+sta {z1}
+lda {z2}+1
+sbc #>{c1}
+sta {z1}+1

src/main/fragment/vwuz1=vbuaa_rol_1.asm

@@ -0,0 +1,5 @@
+asl
+sta {z1}
+lda #0
+rol
+sta {z1}+1

src/main/fragment/vwuz1=vwuz1_minus_pwuc1_derefidx_vbuxx.asm

@@ -0,0 +1,7 @@
+sec
+lda {z1}
+sbc {c1},x
+sta {z1}
+lda {z1}+1
+sbc {c1}+1,x
+sta {z1}+1

src/main/fragment/vwuz1=vwuz1_minus_pwuc1_derefidx_vbuyy.asm

@@ -0,0 +1,7 @@
+sec
+lda {z1}
+sbc {c1},y
+sta {z1}
+lda {z1}+1
+sbc {c1}+1,y
+sta {z1}+1

src/main/fragment/vwuz1_eq_vwuc1_then_la1.asm

@@ -0,0 +1,7 @@
+lda {z1}
+cmp #<{c1}
+bne !+
+lda {z1}+1
+cmp #>{c1}
+beq {la1}
+!:

src/main/fragment/vwuz1_le_vwuz2_then_la1.asm

@@ -3,6 +3,6 @@ cmp {z2}+1
 bne !+
 lda {z1}
 cmp {z2}
+beq {la1}
 !:
 bcc {la1}
-beq {la1}

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

@@ -192,7 +192,7 @@ public class CompileLog {
       return verboseSSAOptimize;
    }
 
-   public CompileLog setVerboseSSAOptimize() {
+   public CompileLog verboseSSAOptimize() {
       setVerboseSSAOptimize(true);
       return this;
    }

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

@@ -153,18 +153,19 @@ public class Compiler {
       new Pass1GenerateControlFlowGraph(program).execute();
       new Pass1ResolveForwardReferences(program).execute();
       new Pass1UnwindBlockScopes(program).execute();
-      new Pass1TypeInference(program).execute();
-      new Pass1TypeIdSimplification(program).execute();
+      new Pass1Procedures(program).execute();
+      new PassNTypeInference(program).execute();
+      new PassNTypeIdSimplification(program).execute();
 
       if(getLog().isVerbosePass1CreateSsa()) {
          getLog().append("SYMBOLS");
-         getLog().append(program.getScope().getSymbolTableContents(program));
+         getLog().append(program.getScope().toString(program, null));
       }
 
       new Pass1FixLValuesLoHi(program).execute();
       new Pass1AssertNoLValueIntermediate(program).execute();
       new Pass1PointerSizeofFix(program).execute();
-      new Pass1AddTypePromotions(program).execute();
+      new PassNAddTypeConversionAssignment(program).execute();
       new Pass1EarlyConstantIdentification(program).execute();
       new PassNStatementIndices(program).step();
       new PassNCallGraphAnalysis(program).step();
@@ -182,7 +183,7 @@ public class Compiler {
       new Pass1EliminateUncalledProcedures(program).execute();
       new PassNEliminateUnusedVars(program, false).execute();
       new Pass1ExtractInlineStrings(program).execute();
-      new Pass1EliminateEmptyBlocks(program).execute();
+      new PassNCullEmptyBlocks(program).execute();
 
       new Pass1ModifiedVarsAnalysis(program).execute();
       if(getLog().isVerbosePass1CreateSsa()) {
@@ -205,7 +206,7 @@ public class Compiler {
       getLog().append(program.getGraph().toString(program));
 
       getLog().append("SYMBOL TABLE SSA");
-      getLog().append(program.getScope().getSymbolTableContents(program));
+      getLog().append(program.getScope().toString(program, null));
 
       return program;
    }
@@ -228,37 +229,50 @@ public class Compiler {
       }
    }
 
-   private void pass2Optimize() {
+   private List<Pass2SsaOptimization> getPass2Optimizations() {
       List<Pass2SsaOptimization> optimizations = new ArrayList<>();
-      optimizations.add(new Pass2CullEmptyBlocks(program));
+      optimizations.add(new Pass2FixInlineConstructorsNew(program));
+
+      optimizations.add(new PassNAddNumberTypeConversions(program));
+      optimizations.add(new PassNAddArrayNumberTypeConversions(program));
+      optimizations.add(new Pass2InlineCast(program));
+      //optimizations.add(new Pass2NopCastInlining(program));
+      optimizations.add(new PassNCastSimplification(program));
+      optimizations.add(new PassNFinalizeNumberTypeConversions(program));
+      optimizations.add(new PassNTypeInference(program));
+      optimizations.add(new PassNAddTypeConversionAssignment(program));
+
+      optimizations.add(new PassNTypeIdSimplification(program));
+      optimizations.add(new Pass2SizeOfSimplification(program));
       optimizations.add(new PassNStatementIndices(program));
       optimizations.add(new PassNVariableReferenceInfos(program));
       optimizations.add(new Pass2UnaryNotSimplification(program));
       optimizations.add(new Pass2AliasElimination(program));
       optimizations.add(new Pass2SelfPhiElimination(program));
-      optimizations.add(new Pass2RedundantPhiElimination(program));
       optimizations.add(new Pass2IdenticalPhiElimination(program));
+      optimizations.add(new Pass2DuplicateRValueIdentification(program));
       optimizations.add(new Pass2ConditionalJumpSimplification(program));
       optimizations.add(new Pass2ConditionalAndOrRewriting(program));
+      optimizations.add(new Pass2ConditionalJumpSequenceImprovement(program)); 
+      optimizations.add(new Pass2ConstantRValueConsolidation(program));
       optimizations.add(new Pass2ConstantIdentification(program));
-      optimizations.add(new PassNStatementIndices(program));
-      optimizations.add(new PassNVariableReferenceInfos(program));
-      optimizations.add(new Pass2ConstantAdditionElimination(program));
+      optimizations.add(new Pass2ConstantValues(program));
+      optimizations.add(new Pass2ConstantCallPointerIdentification(program));
       optimizations.add(new Pass2ConstantIfs(program));
       optimizations.add(new Pass2ConstantStringConsolidation(program));
-      optimizations.add(new Pass2FixInlineConstructors(program));
-      optimizations.add(new Pass2TypeInference(program));
-      optimizations.add(new PassNEliminateUnusedVars(program, true));
-      optimizations.add(new Pass2EliminateRedundantCasts(program));
-      optimizations.add(new Pass2NopCastElimination(program));
-      optimizations.add(new Pass2EliminateUnusedBlocks(program));
       optimizations.add(new Pass2RangeResolving(program));
       optimizations.add(new Pass2ComparisonOptimization(program));
-      optimizations.add(new Pass2ConstantCallPointerIdentification(program));
-      optimizations.add(new Pass2MultiplyToShiftRewriting(program));
-      optimizations.add(new Pass2SizeOfSimplification(program));
       optimizations.add(new Pass2InlineDerefIdx(program));
       optimizations.add(new Pass2DeInlineWordDerefIdx(program));
+      optimizations.add(new PassNSimplifyConstantZero(program));
+      optimizations.add(new PassNSimplifyExpressionWithZero(program));
+      optimizations.add(new PassNEliminateUnusedVars(program, true));
+      optimizations.add(new Pass2EliminateUnusedBlocks(program));
+      return optimizations;
+   }
+
+   private void pass2Optimize() {
+      List<Pass2SsaOptimization> optimizations = getPass2Optimizations();
       pass2Execute(optimizations);
    }
 
@@ -291,13 +305,13 @@ public class Compiler {
    private void pass2InlineConstants() {
       // Constant inlining optimizations - as the last step to ensure that constant identification has been completed
       List<Pass2SsaOptimization> constantOptimizations = new ArrayList<>();
+      constantOptimizations.add(new PassNStatementIndices(program));
+      constantOptimizations.add(new PassNVariableReferenceInfos(program));
+      constantOptimizations.add(new Pass2MultiplyToShiftRewriting(program));
       constantOptimizations.add(new Pass2ConstantInlining(program));
-      constantOptimizations.add(new Pass2ConstantStringConsolidation(program));
-      constantOptimizations.add(new Pass2IdenticalPhiElimination(program));
-      constantOptimizations.add(new Pass2ConstantIdentification(program));
       constantOptimizations.add(new Pass2ConstantAdditionElimination(program));
       constantOptimizations.add(new Pass2ConstantSimplification(program));
-      constantOptimizations.add(new Pass2ConstantIfs(program));
+      constantOptimizations.addAll(getPass2Optimizations());
       pass2Execute(constantOptimizations);
 
    }
@@ -351,11 +365,12 @@ public class Compiler {
    }
 
    private void pass3Analysis() {
+      new Pass3AssertNoTypeId(program).check();
       new Pass3AssertRValues(program).check();
+      new Pass3AssertNoNumbers(program).check();
       new Pass3AssertConstants(program).check();
       new Pass3AssertArrayLengths(program).check();
       new Pass3AssertNoMulDivMod(program).check();
-      new PassNBlockSequencePlanner(program).step();
       // Phi lifting ensures that all variables in phi-blocks are in different live range equivalence classes
       new Pass3PhiLifting(program).perform();
       new PassNBlockSequencePlanner(program).step();
@@ -382,7 +397,7 @@ public class Compiler {
 
       // Phi mem coalesce removes as many variables introduced by phi lifting as possible - as long as their live ranges do not overlap
       new Pass3PhiMemCoalesce(program).step();
-      new Pass2CullEmptyBlocks(program).step();
+      new PassNCullEmptyBlocks(program).step();
       new PassNRenumberLabels(program).execute();
       new PassNBlockSequencePlanner(program).step();
       new Pass3AddNopBeforeCallOns(program).generate();
@@ -516,7 +531,7 @@ public class Compiler {
       new Pass5FixLongBranches(program).optimize();
 
       getLog().append("\nFINAL SYMBOL TABLE");
-      getLog().append(program.getScope().getSymbolTableContents(program));
+      getLog().append(program.getScope().toString(program, null));
 
       getLog().append("\nFINAL ASSEMBLER");
       getLog().append("Score: " + Pass4RegisterUpliftCombinations.getAsmScore(program) + "\n");

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

@@ -1,38 +1,61 @@
 package dk.camelot64.kickc;
 
+import dk.camelot64.kickc.model.types.SymbolType;
+import dk.camelot64.kickc.model.values.ConstantInteger;
+
 /** Parser for converting literal numbers to the corresponding Java Integer/Double */
 public class NumberParser {
 
-   public static Number parseLiteral(String literal) {
-      boolean isInt = !literal.contains(".");
+   public static ConstantInteger parseIntegerLiteral(String literal) {
 
-      if(isInt) {
-         if(literal.startsWith("0x")) {
-            return parseHexInt(literal.substring(2));
-         } else if(literal.startsWith("$")) {
-            return parseHexInt(literal.substring(1));
-         } else if(literal.startsWith("0b")) {
-            return parseBinInt(literal.substring(2));
-         } else if(literal.startsWith("%")) {
-            return parseBinInt(literal.substring(1));
-         } else {
-            return parseDecInt(literal);
-         }
-      } else {
+      boolean isInt = !literal.contains(".");
+      if(!isInt) {
          throw new NumberFormatException("Not Implemented: non-integer parsing. " + literal);
       }
+
+      SymbolType type = SymbolType.NUMBER;
+      if(literal.endsWith("ub") || literal.endsWith("uc")) {
+         type = SymbolType.BYTE;
+         literal = literal.substring(0, literal.length()-2);
+      }  else if(literal.endsWith("sb") || literal.endsWith("sc")) {
+         type = SymbolType.SBYTE;
+         literal = literal.substring(0, literal.length()-2);
+      }  else if(literal.endsWith("uw") || literal.endsWith("ui")|| literal.endsWith("us")) {
+         type = SymbolType.WORD;
+         literal = literal.substring(0, literal.length()-2);
+      }  else if(literal.endsWith("sw") || literal.endsWith("si")|| literal.endsWith("ss")) {
+         type = SymbolType.SWORD;
+         literal = literal.substring(0, literal.length()-2);
+      }  else if(literal.endsWith("ud") || literal.endsWith("ul")) {
+         type = SymbolType.DWORD;
+         literal = literal.substring(0, literal.length()-2);
+      }  else if(literal.endsWith("sd") || literal.endsWith("sl")) {
+         type = SymbolType.SDWORD;
+         literal = literal.substring(0, literal.length()-2);
+      }  else if(literal.endsWith("l")) {
+         type = SymbolType.SDWORD;
+         literal = literal.substring(0, literal.length()-1);
+      }
+
+         Long value;
+         if(literal.startsWith("0x")) {
+            value = Long.parseLong(literal.substring(2), 16);
+         } else if(literal.startsWith("$")) {
+            value = Long.parseLong(literal.substring(1), 16);
+         } else if(literal.startsWith("0b")) {
+            value = Long.parseLong(literal.substring(2), 2);
+         } else if(literal.startsWith("%")) {
+            value = Long.parseLong(literal.substring(1), 2);
+         } else {
+            value = Long.parseLong(literal);
+         }
+         return new ConstantInteger(value, type);
+
    }
 
-   private static Long parseHexInt(String literal) {
-      return Long.parseLong(literal, 16);
-   }
-
-   private static Long parseBinInt(String literal) {
-      return Long.parseLong(literal, 2);
-   }
-
-   private static Long parseDecInt(String literal) {
-      return Long.parseLong(literal);
+   public static Number parseLiteral(String literal) {
+      ConstantInteger constantInteger = parseIntegerLiteral(literal);
+      return constantInteger.getValue();
    }
 
 

src/main/java/dk/camelot64/kickc/fragment/AsmFormat.java

@@ -7,9 +7,7 @@ import dk.camelot64.kickc.model.symbols.ConstantVar;
 import dk.camelot64.kickc.model.symbols.Procedure;
 import dk.camelot64.kickc.model.symbols.Symbol;
 import dk.camelot64.kickc.model.symbols.Variable;
-import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeInference;
-import dk.camelot64.kickc.model.types.SymbolTypePointer;
+import dk.camelot64.kickc.model.types.*;
 import dk.camelot64.kickc.model.values.*;
 
 /** Formatting of numbers, constants, names and more for KickAssembler */
@@ -61,7 +59,7 @@ public class AsmFormat {
          } else if(symbol instanceof Procedure) {
             return getAsmParamName((Procedure) symbol, codeScope);
          } else {
-            throw new RuntimeException("Unhandled symbol type "+symbol);
+            throw new RuntimeException("Unhandled symbol type " + symbol);
          }
       } else if(value instanceof ConstantCastValue) {
          ConstantCastValue castValue = (ConstantCastValue) value;
@@ -75,6 +73,7 @@ public class AsmFormat {
 
    /**
     * Get ASM for a binary constant expression
+    *
     * @param program The program
     * @param left The left operand of the expression
     * @param operator The binary operator
@@ -85,12 +84,12 @@ public class AsmFormat {
    private static String getAsmConstantBinary(Program program, ConstantValue left, OperatorBinary operator, ConstantValue right, ScopeRef codeScope) {
       if(Operators.MODULO.equals(operator)) {
          // Remainder operator % not supported by KickAss - use modulo function instead
-         return "mod("+
+         return "mod(" +
                getAsmConstant(program, left, operator.getPrecedence(), codeScope) +
                "," +
-               getAsmConstant(program, right, operator.getPrecedence(), codeScope)+
+               getAsmConstant(program, right, operator.getPrecedence(), codeScope) +
                ")";
-      }  else {
+      } else {
          return getAsmConstant(program, left, operator.getPrecedence(), codeScope) +
                operator.getOperator() +
                getAsmConstant(program, right, operator.getPrecedence(), codeScope);
@@ -109,64 +108,95 @@ public class AsmFormat {
    private static String getAsmConstantUnary(Program program, ScopeRef codeScope, Operator operator, ConstantValue operand, int outerPrecedence) {
       if(Operators.CAST_BYTE.equals(operator) || Operators.CAST_SBYTE.equals(operator)) {
          SymbolType operandType = SymbolTypeInference.inferType(program.getScope(), operand);
-         if(SymbolType.isByte(operandType) || SymbolType.isSByte(operandType)) {
+         if(SymbolType.BYTE.equals(operandType) || SymbolType.SBYTE.equals(operandType)) {
             // No cast needed
             return getAsmConstant(program, operand, outerPrecedence, codeScope);
-         } else {
-            return getAsmConstant(program, new ConstantBinary(new ConstantInteger((long)0xff), Operators.BOOL_AND, operand), outerPrecedence, codeScope);
          }
-      } else if(operator instanceof OperatorCastPtr || Operators.CAST_WORD.equals(operator) || Operators.CAST_SWORD.equals(operator) ) {
+         ConstantLiteral constantLiteral = operand.calculateLiteral(program.getScope());
+         if(constantLiteral instanceof ConstantInteger && Operators.CAST_BYTE.equals(operator) && SymbolType.BYTE.contains(((ConstantInteger) constantLiteral).getValue())) {
+            // No cast needed
+            return getAsmConstant(program, operand, outerPrecedence, codeScope);
+         }
+         if(constantLiteral instanceof ConstantInteger && Operators.CAST_SBYTE.equals(operator) && SymbolType.SBYTE.contains(((ConstantInteger) constantLiteral).getValue())) {
+            // No cast needed
+            return getAsmConstant(program, operand, outerPrecedence, codeScope);
+         }
+         // Cast is needed
+         return getAsmConstant(program, new ConstantBinary(new ConstantInteger((long) 0xff), Operators.BOOL_AND, operand), outerPrecedence, codeScope);
+      } else if(operator instanceof OperatorCastPtr || Operators.CAST_WORD.equals(operator) || Operators.CAST_SWORD.equals(operator)) {
          SymbolType operandType = SymbolTypeInference.inferType(program.getScope(), operand);
-         if(SymbolType.isWord(operandType) || SymbolType.isSWord(operandType) || SymbolType.isByte(operandType) || SymbolType.isSByte(operandType) || operandType instanceof SymbolTypePointer) {
+         if(SymbolType.WORD.equals(operandType) || SymbolType.SWORD.equals(operandType) || SymbolType.BYTE.equals(operandType) || SymbolType.SBYTE.equals(operandType) || operandType instanceof SymbolTypePointer) {
             // No cast needed
             return getAsmConstant(program, operand, outerPrecedence, codeScope);
-         } else {
-            return getAsmConstant(program, new ConstantBinary(new ConstantInteger((long)0xffff), Operators.BOOL_AND, operand), outerPrecedence, codeScope);
          }
+         ConstantLiteral constantLiteral = operand.calculateLiteral(program.getScope());
+         if(constantLiteral instanceof ConstantInteger  && Operators.CAST_WORD.equals(operator)&& SymbolType.WORD.contains(((ConstantInteger) constantLiteral).getValue())) {
+            // No cast needed
+            return getAsmConstant(program, operand, outerPrecedence, codeScope);
+         }
+         if(constantLiteral instanceof ConstantInteger  && Operators.CAST_SWORD.equals(operator)&& SymbolType.SWORD.contains(((ConstantInteger) constantLiteral).getValue())) {
+            // No cast needed
+            return getAsmConstant(program, operand, outerPrecedence, codeScope);
+         }
+         if(constantLiteral instanceof ConstantInteger  && (operator instanceof OperatorCastPtr) && SymbolType.WORD.contains(((ConstantInteger) constantLiteral).getValue())) {
+            // No cast needed
+            return getAsmConstant(program, operand, outerPrecedence, codeScope);
+         }
+         // Cast is needed
+         return getAsmConstant(program, new ConstantBinary(new ConstantInteger((long) 0xffff), Operators.BOOL_AND, operand), outerPrecedence, codeScope);
       } else if(Operators.CAST_DWORD.equals(operator) || Operators.CAST_SDWORD.equals(operator)) {
          SymbolType operandType = SymbolTypeInference.inferType(program.getScope(), operand);
-         if(SymbolType.isDWord(operandType) || SymbolType.isSDWord(operandType)) {
+         if(SymbolType.DWORD.equals(operandType) || SymbolType.SDWORD.equals(operandType) || SymbolType.WORD.equals(operandType) || SymbolType.SWORD.equals(operandType) || SymbolType.BYTE.equals(operandType) || SymbolType.SBYTE.equals(operandType) || operandType instanceof SymbolTypePointer) {
             // No cast needed
             return getAsmConstant(program, operand, outerPrecedence, codeScope);
-         } else {
-            return getAsmConstant(program, new ConstantBinary(new ConstantInteger((long)0xffffffffL), Operators.BOOL_AND, operand), outerPrecedence, codeScope);
          }
+         ConstantLiteral constantLiteral = operand.calculateLiteral(program.getScope());
+         if(constantLiteral instanceof ConstantInteger  && Operators.CAST_DWORD.equals(operator)&& SymbolType.DWORD.contains(((ConstantInteger) constantLiteral).getValue())) {
+            // No cast needed
+            return getAsmConstant(program, operand, outerPrecedence, codeScope);
+         }
+         if(constantLiteral instanceof ConstantInteger  && Operators.CAST_SDWORD.equals(operator)&& SymbolType.SDWORD.contains(((ConstantInteger) constantLiteral).getValue())) {
+            // No cast needed
+            return getAsmConstant(program, operand, outerPrecedence, codeScope);
+         }
+         // Cast is needed
+         return getAsmConstant(program, new ConstantBinary(new ConstantInteger((long) 0xffffffffL), Operators.BOOL_AND, operand), outerPrecedence, codeScope);
       } else if(Operators.LOWBYTE.equals(operator)) {
          SymbolType operandType = SymbolTypeInference.inferType(program.getScope(), operand);
-         if(SymbolType.isByte(operandType) || SymbolType.isSByte(operandType)) {
+         if(SymbolType.BYTE.equals(operandType) || SymbolType.SBYTE.equals(operandType)) {
             return getAsmConstant(program, operand, outerPrecedence, codeScope);
-         } else if(SymbolType.isWord(operandType) || SymbolType.isSWord(operandType) || operandType instanceof SymbolTypePointer || SymbolType.STRING.equals(operandType)) {
+         } else if(SymbolType.WORD.equals(operandType) || SymbolType.SWORD.equals(operandType) || operandType instanceof SymbolTypePointer || SymbolType.STRING.equals(operandType)) {
             return "<" + getAsmConstant(program, operand, outerPrecedence, codeScope);
-         } else if(SymbolType.isDWord(operandType) || SymbolType.isSDWord(operandType)) {
-            return getAsmConstant(program, new ConstantBinary(operand, Operators.BOOL_AND, new ConstantInteger((long)0xffff)), outerPrecedence, codeScope);
+         } else if(SymbolType.DWORD.equals(operandType) || SymbolType.SDWORD.equals(operandType)) {
+            return getAsmConstant(program, new ConstantBinary(operand, Operators.BOOL_AND, new ConstantInteger((long) 0xffff)), outerPrecedence, codeScope);
          } else {
-            throw new CompileError("Unhandled type "+operand);
+            throw new CompileError("Unhandled type " + operand);
          }
       } else if(Operators.HIBYTE.equals(operator)) {
          SymbolType operandType = SymbolTypeInference.inferType(program.getScope(), operand);
-         if(SymbolType.isByte(operandType) || SymbolType.isSByte(operandType)) {
+         if(SymbolType.BYTE.equals(operandType) || SymbolType.SBYTE.equals(operandType)) {
             return getAsmConstant(program, new ConstantInteger(0l), outerPrecedence, codeScope);
-         } else if(SymbolType.isWord(operandType) || SymbolType.isSWord(operandType) || operandType instanceof SymbolTypePointer || SymbolType.STRING.equals(operandType)) {
+         } else if(SymbolType.WORD.equals(operandType) || SymbolType.SWORD.equals(operandType) || operandType instanceof SymbolTypePointer || SymbolType.STRING.equals(operandType)) {
             return ">" + getAsmConstant(program, operand, outerPrecedence, codeScope);
-         } else if(SymbolType.isDWord(operandType) || SymbolType.isSDWord(operandType)) {
-            return getAsmConstant(program, new ConstantBinary(operand, Operators.SHIFT_RIGHT, new ConstantInteger((long)16)), outerPrecedence, codeScope);
+         } else if(SymbolType.DWORD.equals(operandType) || SymbolType.SDWORD.equals(operandType)) {
+            return getAsmConstant(program, new ConstantBinary(operand, Operators.SHIFT_RIGHT, new ConstantInteger((long) 16)), outerPrecedence, codeScope);
          } else {
-            throw new CompileError("Unhandled type "+operand);
+            throw new CompileError("Unhandled type " + operand);
          }
       } else if(Operators.INCREMENT.equals(operator)) {
-         return getAsmConstant(program, new ConstantBinary(operand, Operators.PLUS, new ConstantInteger((long)1)), outerPrecedence, codeScope);
+         return getAsmConstant(program, new ConstantBinary(operand, Operators.PLUS, new ConstantInteger((long) 1)), outerPrecedence, codeScope);
       } else if(Operators.DECREMENT.equals(operator)) {
-         return getAsmConstant(program, new ConstantBinary(operand, Operators.MINUS, new ConstantInteger((long)1)), outerPrecedence, codeScope);
+         return getAsmConstant(program, new ConstantBinary(operand, Operators.MINUS, new ConstantInteger((long) 1)), outerPrecedence, codeScope);
       } else if(Operators.BOOL_NOT.equals(operator)) {
          SymbolType operandType = SymbolTypeInference.inferType(program.getScope(), operand);
-         if(SymbolType.isByte(operandType) || SymbolType.isSByte(operandType)) {
-            return getAsmConstant(program, new ConstantBinary(operand, Operators.BOOL_XOR, new ConstantInteger((long)0xff)), outerPrecedence, codeScope);
-         } else if(SymbolType.isWord(operandType) || SymbolType.isSWord(operandType) || operandType instanceof SymbolTypePointer || SymbolType.STRING.equals(operandType)) {
-            return getAsmConstant(program, new ConstantBinary(operand, Operators.BOOL_XOR, new ConstantInteger((long)0xffff)), outerPrecedence, codeScope);
-         } else if(SymbolType.isDWord(operandType) || SymbolType.isSDWord(operandType)) {
-            return getAsmConstant(program, new ConstantBinary(operand, Operators.BOOL_XOR, new ConstantInteger((long)0xffffffff)), outerPrecedence, codeScope);
+         if(SymbolType.BYTE.equals(operandType) || SymbolType.SBYTE.equals(operandType)) {
+            return getAsmConstant(program, new ConstantBinary(operand, Operators.BOOL_XOR, new ConstantInteger((long) 0xff)), outerPrecedence, codeScope);
+         } else if(SymbolType.WORD.equals(operandType) || SymbolType.SWORD.equals(operandType) || operandType instanceof SymbolTypePointer || SymbolType.STRING.equals(operandType)) {
+            return getAsmConstant(program, new ConstantBinary(operand, Operators.BOOL_XOR, new ConstantInteger((long) 0xffff)), outerPrecedence, codeScope);
+         } else if(SymbolType.DWORD.equals(operandType) || SymbolType.SDWORD.equals(operandType)) {
+            return getAsmConstant(program, new ConstantBinary(operand, Operators.BOOL_XOR, new ConstantInteger((long) 0xffffffff)), outerPrecedence, codeScope);
          } else {
-            throw new CompileError("Unhandled type "+operand);
+            throw new CompileError("Unhandled type " + operand);
          }
       } else {
          return operator.getOperator() +
@@ -200,7 +230,11 @@ public class AsmFormat {
          if(number.longValue() >= 0L && number.longValue() <= 255L) {
             return SHORT_ASM_NUMBERS[number.intValue()];
          } else {
-            return String.format("$%x", number.longValue());
+            if(number.longValue()<0) {
+               return "-"+getAsmNumber(-number.longValue());
+            } else {
+               return String.format("$%x", number.longValue());
+            }
          }
       }
       throw new RuntimeException("Unsupported number type " + number);
@@ -208,6 +242,7 @@ public class AsmFormat {
 
    /**
     * Get the ASM code for a boolean value
+    *
     * @param bool the boolean vallue
     * @return "0" / "1"
     */

src/main/java/dk/camelot64/kickc/fragment/AsmFragmentInstance.java

@@ -3,14 +3,12 @@ package dk.camelot64.kickc.fragment;
 import dk.camelot64.kickc.NumberParser;
 import dk.camelot64.kickc.asm.*;
 import dk.camelot64.kickc.model.*;
-import dk.camelot64.kickc.model.values.ConstantInteger;
-import dk.camelot64.kickc.model.values.ConstantValue;
+import dk.camelot64.kickc.model.symbols.StructDefinition;
+import dk.camelot64.kickc.model.values.*;
 import dk.camelot64.kickc.model.symbols.ConstantVar;
 import dk.camelot64.kickc.model.symbols.Label;
 import dk.camelot64.kickc.model.symbols.Variable;
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.values.ScopeRef;
-import dk.camelot64.kickc.model.values.Value;
 import dk.camelot64.kickc.parser.KickCBaseVisitor;
 import dk.camelot64.kickc.parser.KickCParser;
 
@@ -97,6 +95,16 @@ public class AsmFragmentInstance {
       } else if(boundValue instanceof Label) {
          String param = ((Label) boundValue).getLocalName().replace('@', 'b').replace(':', '_').replace("$", "_");
          return new AsmParameter(param, false);
+      } else if(boundValue instanceof StructMemberRef) {
+         StructMemberRef structMemberRef = (StructMemberRef) boundValue;
+         StructDefinition structDefinition = program.getScope().getStructDefinition(structMemberRef);
+         Variable structMember = structDefinition.getMember(structMemberRef.getMemberName());
+         int memberByteOffset = structDefinition.getMemberByteOffset(structMember);
+         VariableRef struct = (VariableRef) structMemberRef.getStruct();
+         Variable structVar = program.getScope().getVariable( struct);
+         Registers.RegisterZpStruct structRegister = (Registers.RegisterZpStruct) structVar.getAllocation();
+         // TODO Use STRUCT_OFFSET constants instead of hardcoded constants
+         return new AsmParameter(AsmFormat.getAsmParamName(structVar, codeScopeRef)+"+"+memberByteOffset,true);
       } else {
          throw new RuntimeException("Bound Value Type not implemented " + boundValue);
       }
@@ -300,8 +308,7 @@ public class AsmFragmentInstance {
       @Override
       public AsmParameter visitAsmExprInt(KickCParser.AsmExprIntContext ctx) {
          Number number = NumberParser.parseLiteral(ctx.NUMBER().getText());
-         ConstantInteger intVal = new ConstantInteger(number.longValue());
-         boolean isZp = SymbolType.isByte(intVal.getType()) || SymbolType.isSByte(intVal.getType());
+         boolean isZp = SymbolType.BYTE.contains(number.longValue()) || SymbolType.SBYTE.contains(number.longValue());
          String param = AsmFormat.getAsmNumber(number);
          return new AsmParameter(param, isZp);
       }

src/main/java/dk/camelot64/kickc/fragment/AsmFragmentInstanceSpec.java

@@ -3,11 +3,8 @@ package dk.camelot64.kickc.fragment;
 import dk.camelot64.kickc.model.Program;
 import dk.camelot64.kickc.model.statements.Statement;
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeInference;
-import dk.camelot64.kickc.model.types.SymbolTypeMulti;
-import dk.camelot64.kickc.model.values.ConstantValue;
-import dk.camelot64.kickc.model.values.ScopeRef;
-import dk.camelot64.kickc.model.values.Value;
+import dk.camelot64.kickc.model.types.SymbolTypeIntegerFixed;
+import dk.camelot64.kickc.model.values.*;
 
 import java.util.*;
 
@@ -38,6 +35,7 @@ public class AsmFragmentInstanceSpec {
 
    /**
     * Creates an asm fragment instance specification.
+    *
     * @param program The symbol table
     * @param signature The fragment signature.
     * @param bindings Binding of named values in the fragment to values (constants, variables, ...)
@@ -50,6 +48,7 @@ public class AsmFragmentInstanceSpec {
       this.codeScopeRef = codeScopeRef;
    }
 
+
    public String getSignature() {
       return signature;
    }
@@ -70,7 +69,7 @@ public class AsmFragmentInstanceSpec {
    private ConstantValue variationConstant;
 
    /** When iterating variations this is iterates the potential types for the constant value. */
-   private Iterator<SymbolType> variationIterator;
+   private Iterator<SymbolTypeIntegerFixed> variationIterator;
 
    /** The name of the current variation in the bindings. */
    private String variationCurrentName;
@@ -82,10 +81,11 @@ public class AsmFragmentInstanceSpec {
     * Does any more variations of the ASM fragment instance specification exist?
     * Variations are used for finding the right fragment to use for constant numbers.
     * For instance the number 1000 can be represented as several different types (unsigned/signed word/dword).
+    *
     * @return true if more variations exits
     */
    public boolean hasNextVariation() {
-      if(variationIterator==null) {
+      if(variationIterator == null) {
          // Look for variations
          // TODO Currently only one iterable constant value is handled - add support for multiple iterable constant values!
          for(String name : bindings.keySet()) {
@@ -93,9 +93,9 @@ public class AsmFragmentInstanceSpec {
                // Found a constant value that may be multi-typed
                Value value = bindings.get(name);
                if(value instanceof ConstantValue) {
-                  SymbolType symbolType = SymbolTypeInference.inferType(program.getScope(), (ConstantValue) value);
-                  if(symbolType instanceof SymbolTypeMulti) {
-                     Collection<SymbolType> types = ((SymbolTypeMulti) symbolType).getTypes();
+                  ConstantLiteral constantLiteral = ((ConstantValue) value).calculateLiteral(program.getScope());
+                  if(constantLiteral instanceof ConstantInteger) {
+                     List<SymbolTypeIntegerFixed> types = getVariationTypes(((ConstantInteger) constantLiteral).getValue());
                      if(types.size() > 1) {
                         // Found constant value with multiple types
                         variationConstant = (ConstantValue) value;
@@ -111,13 +111,29 @@ public class AsmFragmentInstanceSpec {
          }
          // If no variations exist add empty iterator
          if(variationIterator == null) {
-            List<SymbolType> empty = new ArrayList<>();
+            List<SymbolTypeIntegerFixed> empty = new ArrayList<>();
             variationIterator = empty.iterator();
          }
       }
       return variationIterator.hasNext();
    }
 
+   /**
+    * Find any fixed integer types that can contain the passed integer value
+    * @param value the value to examine
+    * @return All fixed size integer types capable of representing the passed value
+    */
+   public static List<SymbolTypeIntegerFixed> getVariationTypes(Long value) {
+      ArrayList<SymbolTypeIntegerFixed> potentialTypes = new ArrayList<>();
+      for(SymbolTypeIntegerFixed typeInteger : SymbolTypeIntegerFixed.getIntegerFixedTypes()) {
+         if(typeInteger.contains(value)) {
+            potentialTypes.add(typeInteger);
+         }
+      }
+      return potentialTypes;
+   }
+
+
    /**
     * Updates the ASM fragment instance specification to the next available variation.
     * If no more variations exist the ASM fragment instance specification will become unusable.
@@ -126,7 +142,7 @@ public class AsmFragmentInstanceSpec {
       if(hasNextVariation()) {
          SymbolType nextVariationValue = variationIterator.next();
          // Find the next name
-         String variationConstName = "c"+variationCurrentName.substring(variationCurrentName.length() - 1);
+         String variationConstName = "c" + variationCurrentName.substring(variationCurrentName.length() - 1);
          String variationNextName = AsmFragmentInstanceSpecFactory.getTypePrefix(nextVariationValue) + variationConstName;
          // Update bindings
          Value constValue = bindings.get(variationCurrentName);
@@ -136,7 +152,7 @@ public class AsmFragmentInstanceSpec {
          this.signature = signature.replace(variationCurrentName, variationNextName);
          variationCurrentName = variationNextName;
          variationCurrentValue = nextVariationValue;
-      }  else {
+      } else {
          this.signature = "no-more-variations";
          this.bindings = new LinkedHashMap<>();
       }

src/main/java/dk/camelot64/kickc/fragment/AsmFragmentInstanceSpecFactory.java

@@ -1,23 +1,17 @@
 package dk.camelot64.kickc.fragment;
 
-import dk.camelot64.kickc.model.ControlFlowBlock;
-import dk.camelot64.kickc.model.ControlFlowGraph;
-import dk.camelot64.kickc.model.Program;
-import dk.camelot64.kickc.model.Registers;
+import dk.camelot64.kickc.model.*;
 import dk.camelot64.kickc.model.operators.Operator;
+import dk.camelot64.kickc.model.operators.OperatorUnary;
+import dk.camelot64.kickc.model.operators.Operators;
 import dk.camelot64.kickc.model.statements.Statement;
 import dk.camelot64.kickc.model.statements.StatementAssignment;
 import dk.camelot64.kickc.model.statements.StatementConditionalJump;
-import dk.camelot64.kickc.model.symbols.ConstantVar;
-import dk.camelot64.kickc.model.symbols.Label;
-import dk.camelot64.kickc.model.symbols.Symbol;
-import dk.camelot64.kickc.model.symbols.Variable;
-import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeInference;
-import dk.camelot64.kickc.model.types.SymbolTypePointer;
-import dk.camelot64.kickc.model.types.SymbolTypeProcedure;
+import dk.camelot64.kickc.model.symbols.*;
+import dk.camelot64.kickc.model.types.*;
 import dk.camelot64.kickc.model.values.*;
 
+import java.lang.InternalError;
 import java.util.LinkedHashMap;
 import java.util.Map;
 
@@ -87,6 +81,7 @@ public class AsmFragmentInstanceSpecFactory {
 
    /**
     * Get the created ASM fragment instance specification
+    *
     * @return The ASM fragment instance specification
     */
    public AsmFragmentInstanceSpec getAsmFragmentInstanceSpec() {
@@ -226,15 +221,56 @@ public class AsmFragmentInstanceSpecFactory {
    public String bind(Value value, SymbolType castType) {
 
       if(value instanceof CastValue) {
-         CastValue castVal = (CastValue) value;
-         SymbolType toType = castVal.getToType();
-         value = castVal.getValue();
-         return bind(value, toType);
+         CastValue cast = (CastValue) value;
+         SymbolType toType = cast.getToType();
+         OperatorUnary castUnary = Operators.getCastUnary(toType);
+         RValue castValue = cast.getValue();
+         SymbolType castValueType = SymbolTypeInference.inferType(this.program.getScope(), castValue);
+         if(castValueType.getSizeBytes() == toType.getSizeBytes()) {
+            return bind(castValue, toType);
+         } else {
+            return getOperatorFragmentName(castUnary) + bind(castValue);
+         }
       } else if(value instanceof ConstantCastValue) {
          ConstantCastValue castVal = (ConstantCastValue) value;
-         SymbolType toType = castVal.getToType();
-         value = castVal.getValue();
-         return bind(value, toType);
+         ConstantValue val = castVal.getValue();
+         if(castType == null) {
+            SymbolType toType = castVal.getToType();
+            // If value literal not matching cast type then add expression code to transform it into the value space ( eg. value & 0xff )
+
+            if(toType instanceof SymbolTypeIntegerFixed) {
+               SymbolTypeIntegerFixed integerFixed = (SymbolTypeIntegerFixed) toType;
+               ConstantLiteral constantLiteral;
+               Long integerValue;
+               try {
+                  constantLiteral = val.calculateLiteral(program.getScope());
+                  if(constantLiteral instanceof ConstantInteger) {
+                     integerValue = ((ConstantInteger) constantLiteral).getValue();
+                  } else if(constantLiteral instanceof ConstantPointer) {
+                     integerValue = ((ConstantPointer) constantLiteral).getValue();
+                  } else {
+                     throw new InternalError("Not implemented " + constantLiteral);
+                  }
+               } catch(ConstantNotLiteral e) {
+                  // Assume it is a word
+                  integerValue = 0xffffL;
+               }
+
+               if(!integerFixed.contains(integerValue)) {
+                  if(toType.getSizeBytes() == 1) {
+                     val = new ConstantBinary(new ConstantInteger(0xffL, SymbolType.BYTE), Operators.BOOL_AND, val);
+                  } else if(toType.getSizeBytes() == 2) {
+                     val = new ConstantBinary(new ConstantInteger(0xffffL, SymbolType.WORD), Operators.BOOL_AND, val);
+                  } else {
+                     throw new InternalError("Not implemented " + toType);
+                  }
+               }
+            }
+
+            return bind(val, toType);
+         } else {
+            return bind(val, castType);
+         }
       } else if(value instanceof PointerDereference) {
          PointerDereference deref = (PointerDereference) value;
          SymbolType ptrType = null;
@@ -267,6 +303,27 @@ public class AsmFragmentInstanceSpecFactory {
          String name = "la" + nextLabelIdx++;
          bind(name, value);
          return name;
+      } else if(value instanceof StructZero) {
+         return "vssf" + ((StructZero) value).getTypeStruct().getSizeBytes();
+      } else if(value instanceof StructMemberRef) {
+         StructMemberRef structMemberRef = (StructMemberRef) value;
+         StructDefinition structDefinition = program.getScope().getStructDefinition(structMemberRef);
+         Variable structMember = structDefinition.getMember(structMemberRef.getMemberName());
+         int memberByteOffset = structDefinition.getMemberByteOffset(structMember);
+
+         RValue struct = structMemberRef.getStruct();
+         if(struct instanceof VariableRef) {
+            Variable structVar = program.getScope().getVariable((VariableRef) struct);
+            if(structVar.getAllocation() instanceof Registers.RegisterZpStruct) {
+               Registers.RegisterZpStruct structRegister = (Registers.RegisterZpStruct) structVar.getAllocation();
+               Registers.RegisterZpStructMember memberRegister = structRegister.getMemberRegister(memberByteOffset);
+               String name = getTypePrefix(structMember.getType()) + getRegisterName(memberRegister);
+               bind(name, structMemberRef);
+               return name;
+            }
+         } else {
+            return bind(struct) + "_mbr_" + memberByteOffset;
+         }
       }
       throw new RuntimeException("Binding of value type not supported " + value);
    }
@@ -288,35 +345,37 @@ public class AsmFragmentInstanceSpecFactory {
     * @return The type name
     */
    static String getTypePrefix(SymbolType type) {
-      if(SymbolType.isByte(type)) {
+      if(SymbolType.BYTE.equals(type)) {
          return "vbu";
-      } else if(SymbolType.isSByte(type)) {
+      } else if(SymbolType.SBYTE.equals(type)) {
          return "vbs";
-      } else if(SymbolType.isWord(type)) {
+      } else if(SymbolType.WORD.equals(type)) {
          return "vwu";
-      } else if(SymbolType.isSWord(type)) {
+      } else if(SymbolType.SWORD.equals(type)) {
          return "vws";
-      } else if(SymbolType.isDWord(type)) {
+      } else if(SymbolType.DWORD.equals(type)) {
          return "vdu";
-      } else if(SymbolType.isSDWord(type)) {
+      } else if(SymbolType.SDWORD.equals(type)) {
          return "vds";
       } else if(SymbolType.STRING.equals(type)) {
          return "pbu";
       } else if(SymbolType.BOOLEAN.equals(type)) {
          return "vbo";
+      } else if(type instanceof SymbolTypeStruct) {
+         return "vss";
       } else if(type instanceof SymbolTypePointer) {
          SymbolType elementType = ((SymbolTypePointer) type).getElementType();
-         if(SymbolType.isByte(elementType)) {
+         if(SymbolType.BYTE.equals(elementType)) {
             return "pbu";
-         } else if(SymbolType.isSByte(elementType)) {
+         } else if(SymbolType.SBYTE.equals(elementType)) {
             return "pbs";
-         } else if(SymbolType.isWord(elementType)) {
+         } else if(SymbolType.WORD.equals(elementType)) {
             return "pwu";
-         } else if(SymbolType.isSWord(elementType)) {
+         } else if(SymbolType.SWORD.equals(elementType)) {
             return "pws";
-         } else if(SymbolType.isDWord(elementType)) {
+         } else if(SymbolType.DWORD.equals(elementType)) {
             return "pdu";
-         } else if(SymbolType.isSDWord(elementType)) {
+         } else if(SymbolType.SDWORD.equals(elementType)) {
             return "pds";
          } else if(SymbolType.BOOLEAN.equals(elementType)) {
             return "pbo";
@@ -324,6 +383,8 @@ public class AsmFragmentInstanceSpecFactory {
             return "ppr";
          } else if(elementType instanceof SymbolTypePointer) {
             return "ppt";
+         } else if(elementType instanceof SymbolTypeStruct) {
+            return "pss";
          } else {
             throw new RuntimeException("Not implemented " + type);
          }
@@ -344,8 +405,9 @@ public class AsmFragmentInstanceSpecFactory {
             Registers.RegisterType.ZP_BOOL.equals(register.getType()) ||
                   Registers.RegisterType.ZP_BYTE.equals(register.getType()) ||
                   Registers.RegisterType.ZP_WORD.equals(register.getType()) ||
-                  Registers.RegisterType.ZP_DWORD.equals(register.getType())
-            ) {
+                  Registers.RegisterType.ZP_DWORD.equals(register.getType()) ||
+                  Registers.RegisterType.ZP_STRUCT.equals(register.getType())
+      ) {
          // Examine if the ZP register is already bound
          Registers.RegisterZp registerZp = (Registers.RegisterZp) register;
          String zpNameIdx = null;

src/main/java/dk/camelot64/kickc/model/InternalError.java

@@ -0,0 +1,24 @@
+package dk.camelot64.kickc.model;
+
+import dk.camelot64.kickc.model.statements.Statement;
+import dk.camelot64.kickc.model.statements.StatementSource;
+
+/** Signals an internal error in the compiler. Should be reported to the author. */
+public class InternalError extends RuntimeException {
+
+   public InternalError(String message) {
+      super(message);
+   }
+
+   public InternalError(String message, StatementSource source) {
+      super(message+"\n"+source.toString());
+   }
+
+   public InternalError(String message, Statement statement) {
+      this(message, statement.getSource());
+   }
+
+   public InternalError(String message, Throwable cause) {
+      super(message, cause);
+   }
+}

src/main/java/dk/camelot64/kickc/model/Registers.java

@@ -45,6 +45,7 @@ public class Registers {
       ZP_BYTE,
       ZP_WORD,
       ZP_DWORD,
+      ZP_STRUCT,
       ZP_BOOL,
       CONSTANT
    }
@@ -104,6 +105,7 @@ public class Registers {
       public int hashCode() {
          return zp;
       }
+
    }
 
 
@@ -150,6 +152,38 @@ public class Registers {
 
    }
 
+   /** Zero page addresses used as a register for a struct variable. */
+   public static class RegisterZpStruct extends RegisterZp {
+
+      public RegisterZpStruct(int zp) {
+         super(zp);
+      }
+
+      public RegisterZpStructMember getMemberRegister(int memberByteOffset) {
+         return new RegisterZpStructMember(getZp()+memberByteOffset);
+      }
+
+      @Override
+      public RegisterType getType() {
+         return RegisterType.ZP_STRUCT;
+      }
+
+   }
+
+   /** Zero page addresses used as a register for a struct member variable. */
+   public static class RegisterZpStructMember extends RegisterZp {
+
+      public RegisterZpStructMember(int zp) {
+         super(zp);
+      }
+
+      @Override
+      public RegisterType getType() {
+         return RegisterType.ZP_STRUCT;
+      }
+
+   }
+
 
    /** A zero page address used as a register for a boolean variable. */
    public static class RegisterZpBool extends RegisterZp {

src/main/java/dk/camelot64/kickc/model/VariableReferenceInfos.java

@@ -224,9 +224,11 @@ public class VariableReferenceInfos {
    public Collection<Integer> getConstRefStatements(ConstantRef constRef) {
       Collection<ReferenceToSymbolVar> refs = symbolVarReferences.get(constRef);
       LinkedHashSet<Integer> stmts = new LinkedHashSet<>();
-      refs.stream()
-            .filter(referenceToSymbolVar -> referenceToSymbolVar instanceof ReferenceInStatement)
-            .forEach(referenceToSymbolVar -> stmts.add(((ReferenceInStatement) referenceToSymbolVar).getStatementIdx()));
+      if(refs!=null) {
+         refs.stream()
+               .filter(referenceToSymbolVar -> referenceToSymbolVar instanceof ReferenceInStatement)
+               .forEach(referenceToSymbolVar -> stmts.add(((ReferenceInStatement) referenceToSymbolVar).getStatementIdx()));
+      }
       return stmts;
    }
 
@@ -239,9 +241,11 @@ public class VariableReferenceInfos {
    public Collection<Integer> getVarRefStatements(VariableRef varRef) {
       Collection<ReferenceToSymbolVar> refs = symbolVarReferences.get(varRef);
       LinkedHashSet<Integer> stmts = new LinkedHashSet<>();
-      refs.stream()
-            .filter(referenceToSymbolVar -> referenceToSymbolVar instanceof ReferenceInStatement)
-            .forEach(referenceToSymbolVar -> stmts.add(((ReferenceInStatement) referenceToSymbolVar).getStatementIdx()));
+      if(refs!=null) {
+         refs.stream()
+               .filter(referenceToSymbolVar -> referenceToSymbolVar instanceof ReferenceInStatement)
+               .forEach(referenceToSymbolVar -> stmts.add(((ReferenceInStatement) referenceToSymbolVar).getStatementIdx()));
+      }
       return stmts;
    }
 
@@ -254,10 +258,12 @@ public class VariableReferenceInfos {
    public Collection<Integer> getVarUseStatements(VariableRef varRef) {
       Collection<ReferenceToSymbolVar> refs = symbolVarReferences.get(varRef);
       LinkedHashSet<Integer> stmts = new LinkedHashSet<>();
-      refs.stream()
-            .filter(referenceToSymbolVar -> referenceToSymbolVar instanceof ReferenceInStatement)
-            .filter(referenceToSymbolVar -> ReferenceToSymbolVar.ReferenceType.USE == referenceToSymbolVar.getReferenceType())
-            .forEach(referenceToSymbolVar -> stmts.add(((ReferenceInStatement) referenceToSymbolVar).getStatementIdx()));
+      if(refs!=null) {
+         refs.stream()
+               .filter(referenceToSymbolVar -> referenceToSymbolVar instanceof ReferenceInStatement)
+               .filter(referenceToSymbolVar -> ReferenceToSymbolVar.ReferenceType.USE == referenceToSymbolVar.getReferenceType())
+               .forEach(referenceToSymbolVar -> stmts.add(((ReferenceInStatement) referenceToSymbolVar).getStatementIdx()));
+      }
       return stmts;
    }
 
@@ -271,10 +277,12 @@ public class VariableReferenceInfos {
    public Collection<SymbolVariableRef> getSymbolRefConsts(ConstantRef constRef) {
       Collection<ReferenceToSymbolVar> refs = symbolVarReferences.get(constRef);
       LinkedHashSet<SymbolVariableRef> constRefs = new LinkedHashSet<>();
-      refs.stream()
-            .filter(referenceToSymbolVar -> ReferenceToSymbolVar.ReferenceType.USE.equals(referenceToSymbolVar.getReferenceType()))
-            .filter(referenceToSymbolVar -> referenceToSymbolVar instanceof ReferenceInSymbol)
-            .forEach(referenceToSymbolVar -> constRefs.add(((ReferenceInSymbol) referenceToSymbolVar).getReferencingSymbol()));
+      if(refs!=null) {
+         refs.stream()
+               .filter(referenceToSymbolVar -> ReferenceToSymbolVar.ReferenceType.USE.equals(referenceToSymbolVar.getReferenceType()))
+               .filter(referenceToSymbolVar -> referenceToSymbolVar instanceof ReferenceInSymbol)
+               .forEach(referenceToSymbolVar -> constRefs.add(((ReferenceInSymbol) referenceToSymbolVar).getReferencingSymbol()));
+      }
       return constRefs;
    }
 

src/main/java/dk/camelot64/kickc/model/iterator/ProgramExpression.java

@@ -0,0 +1,26 @@
+package dk.camelot64.kickc.model.iterator;
+
+import dk.camelot64.kickc.model.operators.Operator;
+import dk.camelot64.kickc.model.values.Value;
+
+/** A unary or binary operator expression.
+ * Iterable using {@link ProgramExpressionIterator}.
+ * */
+public interface ProgramExpression {
+
+   /**
+    * Get the operator
+    *
+    * @return the operator
+    */
+   Operator getOperator();
+
+   /**
+    * Replace the unary/binary expression with a new value.
+    *
+    * Throws an exception if replacement is not possible
+    *
+    * @param value The new value.
+    */
+   void set(Value value);
+}

src/main/java/dk/camelot64/kickc/model/iterator/ProgramExpressionBinary.java

@@ -0,0 +1,406 @@
+package dk.camelot64.kickc.model.iterator;
+
+import dk.camelot64.kickc.model.Comment;
+import dk.camelot64.kickc.model.InternalError;
+import dk.camelot64.kickc.model.operators.OperatorBinary;
+import dk.camelot64.kickc.model.operators.Operators;
+import dk.camelot64.kickc.model.statements.Statement;
+import dk.camelot64.kickc.model.statements.StatementAssignment;
+import dk.camelot64.kickc.model.statements.StatementConditionalJump;
+import dk.camelot64.kickc.model.statements.StatementPhiBlock;
+import dk.camelot64.kickc.model.symbols.ProgramScope;
+import dk.camelot64.kickc.model.symbols.Scope;
+import dk.camelot64.kickc.model.symbols.Variable;
+import dk.camelot64.kickc.model.symbols.VariableIntermediate;
+import dk.camelot64.kickc.model.types.SymbolType;
+import dk.camelot64.kickc.model.types.SymbolTypeInference;
+import dk.camelot64.kickc.model.values.*;
+
+import java.util.ListIterator;
+
+/**
+ * A binary expression in the program being iterated by {@link ProgramExpressionIterator}
+ */
+public interface ProgramExpressionBinary extends ProgramExpression {
+
+   /**
+    * Get the left operand
+    *
+    * @return The left operand
+    */
+   RValue getLeft();
+
+   /**
+    * Get the binary operator
+    *
+    * @return the operator
+    */
+   OperatorBinary getOperator();
+
+   /**
+    * Get the right operand
+    *
+    * @return The right operand
+    */
+   RValue getRight();
+
+   /**
+    * Adds a cast to the left operand
+    *
+    * @param toType The toType to cast to
+    */
+   void addLeftCast(SymbolType toType, ListIterator<Statement> stmtIt, ScopeRef currentScope, ProgramScope symbols);
+
+   /**
+    * Adds a cast to the right operand
+    *
+    * @param toType The toType to cast to
+    */
+   void addRightCast(SymbolType toType, ListIterator<Statement> stmtIt, ScopeRef currentScope, ProgramScope symbols);
+
+
+   /** Binary expression assignment rvalue. */
+   class ProgramExpressionBinaryAssignmentRValue implements ProgramExpressionBinary {
+
+      private final StatementAssignment assignment;
+
+      ProgramExpressionBinaryAssignmentRValue(StatementAssignment assignment) {
+         this.assignment = assignment;
+      }
+
+      @Override
+      public RValue getLeft() {
+         return assignment.getrValue1();
+      }
+
+      @Override
+      public OperatorBinary getOperator() {
+         return (OperatorBinary) assignment.getOperator();
+      }
+
+      @Override
+      public RValue getRight() {
+         return assignment.getrValue2();
+      }
+
+      @Override
+      public void set(Value value) {
+         assignment.setrValue2((RValue) value);
+         assignment.setOperator(null);
+         assignment.setrValue1(null);
+      }
+
+      @Override
+      public void addLeftCast(SymbolType toType, ListIterator<Statement> stmtIt, ScopeRef currentScope, ProgramScope symbols) {
+         if(assignment.getrValue1() instanceof ConstantValue) {
+            assignment.setrValue1(new ConstantCastValue(toType, (ConstantValue) assignment.getrValue1()));
+         } else {
+            Scope blockScope = symbols.getScope(currentScope);
+            VariableIntermediate tmpVar = blockScope.addVariableIntermediate();
+            tmpVar.setTypeInferred(toType);
+            StatementAssignment newAssignment = new StatementAssignment(tmpVar.getRef(), Operators.getCastUnary(toType), assignment.getrValue1(), assignment.getSource(), Comment.NO_COMMENTS);
+            assignment.setrValue1(tmpVar.getRef());
+            stmtIt.previous();
+            stmtIt.add(newAssignment);
+            stmtIt.next();
+         }
+      }
+
+      @Override
+      public void addRightCast(SymbolType toType, ListIterator<Statement> stmtIt, ScopeRef currentScope, ProgramScope symbols) {
+         if(assignment.getrValue2() instanceof ConstantValue) {
+            assignment.setrValue2(new ConstantCastValue(toType, (ConstantValue) assignment.getrValue2()));
+         } else {
+            Scope blockScope = symbols.getScope(currentScope);
+            VariableIntermediate tmpVar = blockScope.addVariableIntermediate();
+            tmpVar.setTypeInferred(toType);
+            StatementAssignment newAssignment = new StatementAssignment(tmpVar.getRef(), Operators.getCastUnary(toType), assignment.getrValue2(), assignment.getSource(), Comment.NO_COMMENTS);
+            assignment.setrValue2(tmpVar.getRef());
+            stmtIt.previous();
+            stmtIt.add(newAssignment);
+            stmtIt.next();
+         }
+      }
+   }
+
+   /** Binary expression - assignment lvalue and the "total" rvalue. */
+   class ProgramExpressionBinaryAssignmentLValue implements ProgramExpressionBinary {
+      private final StatementAssignment assignment;
+
+      ProgramExpressionBinaryAssignmentLValue(StatementAssignment assignment) {
+         this.assignment = assignment;
+      }
+
+      @Override
+      public RValue getLeft() {
+         return assignment.getlValue();
+      }
+
+      @Override
+      public OperatorBinary getOperator() {
+         return Operators.ASSIGNMENT;
+      }
+
+      @Override
+      public RValue getRight() {
+         if(assignment.getrValue1() == null && assignment.getOperator() == null) {
+            return assignment.getrValue2();
+         } else {
+            return new AssignmentRValue(assignment);
+         }
+      }
+
+      @Override
+      public void set(Value value) {
+         throw new InternalError("Updating an entire assignment is not allowed!");
+      }
+
+      @Override
+      public void addLeftCast(SymbolType toType, ListIterator<Statement> stmtIt, ScopeRef currentScope, ProgramScope symbols) {
+         if(assignment.getlValue() instanceof VariableRef) {
+            Variable variable = symbols.getVariable((VariableRef) assignment.getlValue());
+            if(variable.isInferredType())
+               variable.setTypeInferred(toType);
+            else
+               throw new InternalError("Cannot cast declared type!" + variable.toString());
+         } else {
+            Scope blockScope = symbols.getScope(currentScope);
+            VariableIntermediate tmpVar = blockScope.addVariableIntermediate();
+            SymbolType rightType = SymbolTypeInference.inferType(symbols, getRight());
+            tmpVar.setTypeInferred(rightType);
+            StatementAssignment newAssignment = new StatementAssignment(assignment.getlValue(), Operators.getCastUnary(toType), tmpVar.getRef(), assignment.getSource(), Comment.NO_COMMENTS);
+            assignment.setlValue(tmpVar.getRef());
+            stmtIt.add(newAssignment);
+         }
+      }
+
+      @Override
+      public void addRightCast(SymbolType toType, ListIterator<Statement> stmtIt, ScopeRef currentScope, ProgramScope symbols) {
+         if(assignment.getrValue1() == null && assignment.getOperator() == null) {
+            assignment.setOperator(Operators.getCastUnary(toType));
+         } else {
+            Scope blockScope = symbols.getScope(currentScope);
+            VariableIntermediate tmpVar = blockScope.addVariableIntermediate();
+            SymbolType rightType = SymbolTypeInference.inferType(symbols, getRight());
+            tmpVar.setTypeInferred(rightType);
+            StatementAssignment newAssignment = new StatementAssignment(assignment.getlValue(), Operators.getCastUnary(toType), tmpVar.getRef(), assignment.getSource(), Comment.NO_COMMENTS);
+            assignment.setlValue(tmpVar.getRef());
+            stmtIt.add(newAssignment);
+         }
+      }
+
+   }
+
+   /** Binary expression conditional jump. */
+   class ProgramExpressionBinaryConditionalJump implements ProgramExpressionBinary {
+      private final StatementConditionalJump conditionalJump;
+
+      ProgramExpressionBinaryConditionalJump(StatementConditionalJump assignment) {
+         this.conditionalJump = assignment;
+      }
+
+      @Override
+      public RValue getLeft() {
+         return conditionalJump.getrValue1();
+      }
+
+      @Override
+      public OperatorBinary getOperator() {
+         return (OperatorBinary) conditionalJump.getOperator();
+      }
+
+      @Override
+      public RValue getRight() {
+         return conditionalJump.getrValue2();
+      }
+
+      @Override
+      public void set(Value value) {
+         conditionalJump.setrValue2((RValue) value);
+         conditionalJump.setOperator(null);
+         conditionalJump.setrValue1(null);
+      }
+
+      @Override
+      public void addLeftCast(SymbolType toType, ListIterator<Statement> stmtIt, ScopeRef currentScope, ProgramScope symbols) {
+         if(conditionalJump.getrValue1() instanceof ConstantValue) {
+            conditionalJump.setrValue1(new ConstantCastValue(toType, (ConstantValue) conditionalJump.getrValue1()));
+         } else {
+            throw new InternalError("Not implemented!");
+         }
+      }
+
+      @Override
+      public void addRightCast(SymbolType toType, ListIterator<Statement> stmtIt, ScopeRef currentScope, ProgramScope symbols) {
+         if(conditionalJump.getrValue2() instanceof ConstantValue) {
+            conditionalJump.setrValue2(new ConstantCastValue(toType, (ConstantValue) conditionalJump.getrValue2()));
+         } else {
+            throw new InternalError("Not implemented!");
+         }
+      }
+
+
+   }
+
+   /** Binary expression as part of a constant expression. */
+   class ProgramExpressionBinaryConstant implements ProgramExpressionBinary {
+      /** A program value containing a {@link ConstantBinary}. */
+      private ProgramValue programValue;
+
+      public ProgramExpressionBinaryConstant(ProgramValue programValue) {
+         this.programValue = programValue;
+      }
+
+      public ConstantBinary getConstantBinary() {
+         return (ConstantBinary) programValue.get();
+      }
+
+      @Override
+      public RValue getLeft() {
+         return getConstantBinary().getLeft();
+      }
+
+      @Override
+      public OperatorBinary getOperator() {
+         return getConstantBinary().getOperator();
+      }
+
+      @Override
+      public RValue getRight() {
+         return getConstantBinary().getRight();
+      }
+
+      @Override
+      public void set(Value value) {
+         programValue.set(value);
+      }
+
+      @Override
+      public void addLeftCast(SymbolType toType, ListIterator<Statement> stmtIt, ScopeRef currentScope, ProgramScope symbols) {
+         getConstantBinary().setLeft(new ConstantCastValue(toType, getConstantBinary().getLeft()));
+      }
+
+      @Override
+      public void addRightCast(SymbolType toType, ListIterator<Statement> stmtIt, ScopeRef currentScope, ProgramScope symbols) {
+         getConstantBinary().setRight(new ConstantCastValue(toType, getConstantBinary().getRight()));
+      }
+   }
+
+   /** Binary expression that is an indexed dereference of a pointer eg. ptr[i] or *(ptr+i). */
+   class ProgramExpressionBinaryPointerDereferenceIndexed implements ProgramExpressionBinary {
+      /** A program value containing a {@link ConstantBinary}. */
+      private ProgramValue programValue;
+
+      public ProgramExpressionBinaryPointerDereferenceIndexed(ProgramValue programValue) {
+         this.programValue = programValue;
+      }
+
+      public PointerDereferenceIndexed getPointerDereferenceIndexed() {
+         return (PointerDereferenceIndexed) programValue.get();
+      }
+
+      @Override
+      public RValue getLeft() {
+         return getPointerDereferenceIndexed().getPointer();
+      }
+
+      @Override
+      public OperatorBinary getOperator() {
+         return Operators.PLUS;
+      }
+
+      @Override
+      public RValue getRight() {
+         return getPointerDereferenceIndexed().getIndex();
+      }
+
+      @Override
+      public void set(Value value) {
+         programValue.set(value);
+      }
+
+      @Override
+      public void addLeftCast(SymbolType toType, ListIterator<Statement> stmtIt, ScopeRef currentScope, ProgramScope symbols) {
+         if(getPointerDereferenceIndexed().getPointer() instanceof ConstantValue) {
+            getPointerDereferenceIndexed().setPointer(new ConstantCastValue(toType, (ConstantValue) getPointerDereferenceIndexed().getPointer()));
+         } else {
+            // Try to use CastValue - may later have to be supported!
+            getPointerDereferenceIndexed().setPointer(new CastValue(toType, getPointerDereferenceIndexed().getPointer()));
+         }
+      }
+
+      @Override
+      public void addRightCast(SymbolType toType, ListIterator<Statement> stmtIt, ScopeRef currentScope, ProgramScope symbols) {
+         if(getPointerDereferenceIndexed().getIndex() instanceof ConstantValue) {
+            getPointerDereferenceIndexed().setIndex(new ConstantCastValue(toType, (ConstantValue) getPointerDereferenceIndexed().getIndex()));
+         } else if( getPointerDereferenceIndexed().getIndex() instanceof VariableRef) {
+            Variable variable = symbols.getVariable((VariableRef) getPointerDereferenceIndexed().getIndex());
+            if(variable.isInferredType())
+               variable.setTypeInferred(toType);
+            else
+               throw new InternalError("Cannot cast declared type!" + variable.toString());
+
+         } else {
+            // Try to use CastValue - may later have to be supported!
+            getPointerDereferenceIndexed().setIndex(new CastValue(toType, getPointerDereferenceIndexed().getIndex()));
+         }
+      }
+   }
+
+
+   /** Assignment of a phi value to a phi variable. */
+   class ProgramExpressionBinaryPhiValueAssignemnt implements ProgramExpressionBinary {
+
+      private final StatementPhiBlock.PhiVariable phiVariable;
+      private final StatementPhiBlock.PhiRValue value;
+
+      public ProgramExpressionBinaryPhiValueAssignemnt(StatementPhiBlock.PhiVariable phiVariable, StatementPhiBlock.PhiRValue value) {
+         this.phiVariable = phiVariable;
+         this.value = value;
+      }
+
+      @Override
+      public RValue getLeft() {
+         return phiVariable.getVariable();
+      }
+
+      @Override
+      public OperatorBinary getOperator() {
+         return Operators.ASSIGNMENT;
+      }
+
+      @Override
+      public RValue getRight() {
+         return value.getrValue();
+      }
+
+      @Override
+      public void addLeftCast(SymbolType toType, ListIterator<Statement> stmtIt, ScopeRef currentScope, ProgramScope symbols) {
+         Variable variable = symbols.getVariable(phiVariable.getVariable());
+         if(variable.isInferredType())
+            variable.setTypeInferred(toType);
+         else
+            throw new InternalError("Cannot cast declared type!" + variable.toString());
+      }
+
+      @Override
+      public void addRightCast(SymbolType toType, ListIterator<Statement> stmtIt, ScopeRef currentScope, ProgramScope symbols) {
+         if(getRight() instanceof VariableRef) {
+            Variable variable = symbols.getVariable((VariableRef) getRight());
+            if(variable.isInferredType())
+               variable.setTypeInferred(toType);
+         } else if(getRight() instanceof ConstantValue) {
+            value.setrValue(new ConstantCastValue(toType, (ConstantValue) getRight()));
+         } else {
+            value.setrValue(new CastValue(toType, getRight()));
+         }
+      }
+
+      @Override
+      public void set(Value value) {
+         throw new InternalError("Not supported!");
+      }
+   }
+
+
+}

src/main/java/dk/camelot64/kickc/model/iterator/ProgramExpressionHandler.java

@@ -0,0 +1,26 @@
+package dk.camelot64.kickc.model.iterator;
+
+import dk.camelot64.kickc.model.ControlFlowBlock;
+import dk.camelot64.kickc.model.statements.Statement;
+
+import java.util.ListIterator;
+
+/** A handler that performs some action for unary/binary expressions in the program.
+ *  A {@link ProgramExpressionIterator} can be used to iterate all unary/binary expressions in a part of the program.
+ *  The Handler then receives all unary/binary expressions one at a time.
+ *  The Handler has the option of modifying the expression. After the handler is executed all sub-values are recursed.
+ *  The execute() method furthermore receives some extra parameters with information about the context of the passed value.
+ */
+public interface ProgramExpressionHandler {
+
+   /**
+    * Handle a single expression
+    *
+    * @param programExpression The expression
+    * @param currentStmt The statement iterator - just past the current statement that the value is a part of. Current statment can be retrieved by calling
+    * @param stmtIt The statement iterator - just past the current statement. Can be used for modifying the control flow block.
+    * @param currentBlock The current block that the value is a part of
+    */
+   void execute(ProgramExpression programExpression, Statement currentStmt, ListIterator<Statement> stmtIt, ControlFlowBlock currentBlock);
+
+}

src/main/java/dk/camelot64/kickc/model/iterator/ProgramExpressionIterator.java

@@ -0,0 +1,75 @@
+package dk.camelot64.kickc.model.iterator;
+
+import dk.camelot64.kickc.model.ControlFlowBlock;
+import dk.camelot64.kickc.model.Program;
+import dk.camelot64.kickc.model.statements.Statement;
+import dk.camelot64.kickc.model.statements.StatementAssignment;
+import dk.camelot64.kickc.model.statements.StatementConditionalJump;
+import dk.camelot64.kickc.model.statements.StatementPhiBlock;
+import dk.camelot64.kickc.model.values.*;
+
+import java.util.ListIterator;
+
+/**
+ * Capable of iterating the different structures of a Program (graph, block, statement, symboltable, symbol).
+ * Creates appropriate BinaryExpressions and passes them to a ProgramExpressionHandler.
+ * Iteration might be guided (eg. filtering some types of the structure to iterate at call-time)
+ */
+public class ProgramExpressionIterator {
+
+   /**
+    * Execute a handler on all values in the entire program (both in the control flow graph and the symbol table.)
+    *
+    * @param program The program
+    * @param handler The handler to execute
+    */
+   public static void execute(Program program, ProgramExpressionHandler handler) {
+      // Iterate all symbols
+      ProgramValueHandler programValueHandler = (programValue, currentStmt, stmtIt, currentBlock) -> {
+         if(programValue.get() instanceof ConstantBinary) {
+            handler.execute(new ProgramExpressionBinary.ProgramExpressionBinaryConstant(programValue), currentStmt, stmtIt, currentBlock);
+         } else if(programValue.get() instanceof ConstantUnary) {
+            handler.execute(new ProgramExpressionUnary.ProgramExpressionUnaryConstant(programValue), currentStmt, stmtIt, currentBlock);
+         } else if(programValue.get() instanceof PointerDereferenceIndexed) {
+            handler.execute(new ProgramExpressionBinary.ProgramExpressionBinaryPointerDereferenceIndexed(programValue), currentStmt, stmtIt, currentBlock);
+         } else if(programValue.get() instanceof ConstantCastValue) {
+            handler.execute(new ProgramExpressionUnary.ProgramExpressionUnaryConstantCast(programValue), currentStmt, stmtIt, currentBlock);
+         } else if(programValue.get() instanceof CastValue) {
+            handler.execute(new ProgramExpressionUnary.ProgramExpressionUnaryCast(programValue), currentStmt, stmtIt, currentBlock);
+         }
+      };
+      ProgramValueIterator.execute(program.getScope(), programValueHandler);
+
+      // Iterate all blocks/statements
+      for(ControlFlowBlock block : program.getGraph().getAllBlocks()) {
+         ListIterator<Statement> stmtIt = block.getStatements().listIterator();
+         while(stmtIt.hasNext()) {
+            Statement stmt = stmtIt.next();
+            if(stmt instanceof StatementAssignment) {
+               StatementAssignment assignment = (StatementAssignment) stmt;
+               if(assignment.getrValue1() != null && assignment.getOperator() != null && assignment.getrValue2() != null) {
+                  handler.execute(new ProgramExpressionBinary.ProgramExpressionBinaryAssignmentRValue(assignment), stmt, stmtIt, block);
+               } else if(assignment.getrValue1() == null && assignment.getOperator() != null && assignment.getrValue2() != null) {
+                  handler.execute(new ProgramExpressionUnary.ProgramExpressionUnaryAssignmentRValue(assignment), stmt, stmtIt, block);
+               }
+               handler.execute(new ProgramExpressionBinary.ProgramExpressionBinaryAssignmentLValue(assignment), stmt, stmtIt, block);
+            } else if(stmt instanceof StatementConditionalJump) {
+               StatementConditionalJump condJump = (StatementConditionalJump) stmt;
+               if(condJump.getrValue1() != null && condJump.getOperator() != null && condJump.getrValue2() != null) {
+                  handler.execute(new ProgramExpressionBinary.ProgramExpressionBinaryConditionalJump(condJump), stmt, stmtIt, block);
+               }
+            } else if(stmt instanceof StatementPhiBlock) {
+               for(StatementPhiBlock.PhiVariable phiVariable : ((StatementPhiBlock) stmt).getPhiVariables()) {
+                  for(StatementPhiBlock.PhiRValue value : phiVariable.getValues()) {
+                     handler.execute(new ProgramExpressionBinary.ProgramExpressionBinaryPhiValueAssignemnt(phiVariable, value), stmt, stmtIt, block);
+                  }
+               }
+            }
+            // Iterate all statement values
+            ProgramValueIterator.execute(stmt, programValueHandler, stmtIt, block);
+         }
+      }
+
+   }
+
+}

src/main/java/dk/camelot64/kickc/model/iterator/ProgramExpressionUnary.java

@@ -0,0 +1,146 @@
+package dk.camelot64.kickc.model.iterator;
+
+import dk.camelot64.kickc.model.operators.OperatorUnary;
+import dk.camelot64.kickc.model.operators.Operators;
+import dk.camelot64.kickc.model.statements.StatementAssignment;
+import dk.camelot64.kickc.model.values.*;
+
+/**
+ * A binary expression in the program being iterated by {@link ProgramExpressionIterator}
+ */
+public interface ProgramExpressionUnary extends ProgramExpression {
+
+   /**
+    * Get the unary operator
+    *
+    * @return the operator
+    */
+   OperatorUnary getOperator();
+
+   /**
+    * Get the right operand
+    *
+    * @return The right operand
+    */
+   RValue getOperand();
+
+   /** Unary expression assignment rvalue. */
+   class ProgramExpressionUnaryAssignmentRValue implements ProgramExpressionUnary {
+      private final StatementAssignment assignment;
+
+      ProgramExpressionUnaryAssignmentRValue(StatementAssignment assignment) {
+         this.assignment = assignment;
+      }
+
+      @Override
+      public OperatorUnary getOperator() {
+         return (OperatorUnary) assignment.getOperator();
+      }
+
+      @Override
+      public RValue getOperand() {
+         return assignment.getrValue2();
+      }
+
+      @Override
+      public void set(Value value) {
+         assignment.setrValue2((RValue) value);
+         assignment.setOperator(null);
+      }
+   }
+
+   /** Unary expression as part of a constant expression. */
+   class ProgramExpressionUnaryConstant implements ProgramExpressionUnary {
+
+      /** A ProgramValue containing a {@link ConstantUnary}. */
+      private ProgramValue programValue;
+
+      ProgramExpressionUnaryConstant(ProgramValue programValue) {
+         this.programValue = programValue;
+      }
+
+      public ConstantUnary getConstantUnary() {
+         return (ConstantUnary) programValue.get();
+      }
+
+      @Override
+      public OperatorUnary getOperator() {
+         return (getConstantUnary()).getOperator();
+      }
+
+      @Override
+      public RValue getOperand() {
+         return getConstantUnary().getOperand();
+      }
+
+      @Override
+      public void set(Value value) {
+         programValue.set(value);
+      }
+
+   }
+
+   /** Unary cast expression {@link ConstantCastValue} as part of a constant expression. */
+   class ProgramExpressionUnaryConstantCast implements ProgramExpressionUnary {
+
+      /** A ProgramValue containing a {@link ConstantCastValue}. */
+      private ProgramValue programValue;
+
+      ProgramExpressionUnaryConstantCast(ProgramValue programValue) {
+         this.programValue = programValue;
+      }
+
+      public ConstantCastValue getConstantUnary() {
+         return (ConstantCastValue) programValue.get();
+      }
+
+      @Override
+      public OperatorUnary getOperator() {
+         return Operators.getCastUnary(getConstantUnary().getToType());
+      }
+
+      @Override
+      public RValue getOperand() {
+         return getConstantUnary().getValue();
+      }
+
+      @Override
+      public void set(Value value) {
+         programValue.set(value);
+      }
+
+   }
+
+   /** Unary cast expression {@link CastValue} as part of a constant expression. */
+   class ProgramExpressionUnaryCast implements ProgramExpressionUnary {
+
+      /** A ProgramValue containing a {@link CastValue}. */
+      private ProgramValue programValue;
+
+      ProgramExpressionUnaryCast(ProgramValue programValue) {
+         this.programValue = programValue;
+      }
+
+      public CastValue getConstantUnary() {
+         return (CastValue) programValue.get();
+      }
+
+      @Override
+      public OperatorUnary getOperator() {
+         return Operators.getCastUnary(getConstantUnary().getToType());
+      }
+
+      @Override
+      public RValue getOperand() {
+         return getConstantUnary().getValue();
+      }
+
+      @Override
+      public void set(Value value) {
+         programValue.set(value);
+      }
+
+   }
+
+
+}

src/main/java/dk/camelot64/kickc/model/iterator/ProgramValueIterator.java

@@ -50,10 +50,10 @@ public class ProgramValueIterator {
     */
    public static void execute(SymbolVariable symbolVariable, ProgramValueHandler programValueHandler) {
       if(symbolVariable.getType() instanceof SymbolTypeArray) {
-         execute(new ProgramValue.TypeArraySize((SymbolTypeArray) symbolVariable.getType()), programValueHandler, null, null, null);
+         execute(new ProgramValue.ProgramValueTypeArraySize((SymbolTypeArray) symbolVariable.getType()), programValueHandler, null, null, null);
       }
       if(symbolVariable instanceof ConstantVar) {
-         execute(new ProgramValue.ConstantVariableValue((ConstantVar) symbolVariable), programValueHandler, null, null, null);
+         execute(new ProgramValue.ProgramValueConstantVar((ConstantVar) symbolVariable), programValueHandler, null, null, null);
       }
    }
 
@@ -98,7 +98,7 @@ public class ProgramValueIterator {
          // The sequence RValue1, RValue2, LValue is important - as it is essential for {@link dk.camelot64.kickc.passes.Pass1GenerateSingleStaticAssignmentForm} to create the correct SSA
          execute(new ProgramValue.RValue1((StatementAssignment) statement), handler, statement, statementsIt, block);
          execute(new ProgramValue.RValue2((StatementAssignment) statement), handler, statement, statementsIt, block);
-         execute(new ProgramValue.LValue((StatementLValue) statement), handler, statement, statementsIt, block);
+         execute(new ProgramValue.ProgramValueLValue((StatementLValue) statement), handler, statement, statementsIt, block);
       } else if(statement instanceof StatementCall) {
          StatementCall call = (StatementCall) statement;
          if(call.getParameters() != null) {
@@ -107,7 +107,7 @@ public class ProgramValueIterator {
                execute(new ProgramValue.CallParameter(call, i), handler, statement, statementsIt, block);
             }
          }
-         execute(new ProgramValue.LValue((StatementLValue) statement), handler, statement, statementsIt, block);
+         execute(new ProgramValue.ProgramValueLValue((StatementLValue) statement), handler, statement, statementsIt, block);
       } else if(statement instanceof StatementCallPointer) {
          StatementCallPointer call = (StatementCallPointer) statement;
          execute(new ProgramValue.CallPointerProcedure((StatementCallPointer) statement), handler, statement, statementsIt, block);
@@ -117,7 +117,7 @@ public class ProgramValueIterator {
                execute(new ProgramValue.CallPointerParameter(call, i), handler, statement, statementsIt, block);
             }
          }
-         execute(new ProgramValue.LValue((StatementLValue) statement), handler, statement, statementsIt, block);
+         execute(new ProgramValue.ProgramValueLValue((StatementLValue) statement), handler, statement, statementsIt, block);
       } else if(statement instanceof StatementConditionalJump) {
          execute(new ProgramValue.CondRValue1((StatementConditionalJump) statement), handler, statement, statementsIt, block);
          execute(new ProgramValue.CondRValue2((StatementConditionalJump) statement), handler, statement, statementsIt, block);
@@ -137,15 +137,15 @@ public class ProgramValueIterator {
          StatementKickAsm statementKickAsm = (StatementKickAsm) statement;
          RValue location = statementKickAsm.getLocation();
          if(location!=null) {
-            execute(new ProgramValue.KickAsmLocation(statementKickAsm), handler, statement, statementsIt, block);
+            execute(new ProgramValue.ProgramValueKickAsmLocation(statementKickAsm), handler, statement, statementsIt, block);
          }
          RValue bytes = statementKickAsm.getLocation();
          if(bytes!=null) {
-            execute(new ProgramValue.KickAsmBytes(statementKickAsm), handler, statement, statementsIt, block);
+            execute(new ProgramValue.ProgramValueKickAsmBytes(statementKickAsm), handler, statement, statementsIt, block);
          }
          RValue cycles = statementKickAsm.getLocation();
          if(cycles!=null) {
-            execute(new ProgramValue.KickAsmCycles(statementKickAsm), handler, statement, statementsIt, block);
+            execute(new ProgramValue.ProgramValueKickAsmCycles(statementKickAsm), handler, statement, statementsIt, block);
          }
          List<SymbolVariableRef> uses = statementKickAsm.getUses();
          for(int i = 0; i < uses.size(); i++) {
@@ -155,7 +155,7 @@ public class ProgramValueIterator {
          StatementAsm statementAsm = (StatementAsm) statement;
          Map<String, SymbolVariableRef> referenced = statementAsm.getReferenced();
          for(String label : referenced.keySet()) {
-            execute(new ProgramValue.AsmReferenced(statementAsm, label), handler, statement, statementsIt, block);
+            execute(new ProgramValue.ProgramValueAsmReferenced(statementAsm, label), handler, statement, statementsIt, block);
          }
       }
    }
@@ -182,47 +182,50 @@ public class ProgramValueIterator {
    private static Collection<ProgramValue> getSubValues(Value value) {
       ArrayList<ProgramValue> subValues = new ArrayList<>();
       if(value instanceof PointerDereferenceIndexed) {
-         subValues.add(new ProgramValue.Pointer((PointerDereference) value));
-         subValues.add(new ProgramValue.PointerIndex((PointerDereferenceIndexed) value));
+         subValues.add(new ProgramValue.ProgramValuePointer((PointerDereference) value));
+         subValues.add(new ProgramValue.ProgramValuePointerIndex((PointerDereferenceIndexed) value));
       } else if(value instanceof PointerDereferenceSimple) {
-         subValues.add(new ProgramValue.Pointer((PointerDereference) value));
+         subValues.add(new ProgramValue.ProgramValuePointer((PointerDereference) value));
+      } else if(value instanceof StructMemberRef) {
+         subValues.add(new ProgramValue.ProgramValueStruct((StructMemberRef) value));
       } else if(value instanceof ValueList) {
          ValueList valueList = (ValueList) value;
          int size = valueList.getList().size();
          for(int i = 0; i < size; i++) {
-            subValues.add(new ProgramValue.ListElement(valueList, i));
+            subValues.add(new ProgramValue.ProgramValueListElement(valueList, i));
          }
       } else if(value instanceof ConstantArrayList) {
          ConstantArrayList constantArrayList = (ConstantArrayList) value;
          int size = constantArrayList.getElements().size();
          for(int i = 0; i < size; i++) {
-            subValues.add(new ProgramValue.ConstantArrayElement(constantArrayList, i));
+            subValues.add(new ProgramValue.ProgramValueConstantArrayElement(constantArrayList, i));
          }
       } else if(value instanceof CastValue) {
-         subValues.add(new ProgramValue.CastValue((CastValue) value));
+         subValues.add(new ProgramValue.ProgramValueCastValue((CastValue) value));
       } else if(value instanceof ConstantCastValue) {
-         subValues.add(new ProgramValue.ConstantCastValue((ConstantCastValue) value));
+         subValues.add(new ProgramValue.ProgramValueConstantCastValue((ConstantCastValue) value));
       } else if(value instanceof ConstantSymbolPointer) {
-         subValues.add(new ProgramValue.ConstantSymbolPointerTo((ConstantSymbolPointer) value));
+         subValues.add(new ProgramValue.ProgramValueConstantSymbolPointerTo((ConstantSymbolPointer) value));
       } else if(value instanceof RangeValue) {
-         subValues.add(new ProgramValue.RangeFirst((RangeValue) value));
-         subValues.add(new ProgramValue.RangeLast((RangeValue) value));
+         subValues.add(new ProgramValue.ProgramValueRangeFirst((RangeValue) value));
+         subValues.add(new ProgramValue.ProgramValueRangeLast((RangeValue) value));
       } else if(value instanceof ConstantBinary) {
-         subValues.add(new ProgramValue.ConstantBinaryLeft((ConstantBinary) value));
-         subValues.add(new ProgramValue.ConstantBinaryRight((ConstantBinary) value));
+         subValues.add(new ProgramValue.ProgramValueConstantBinaryLeft((ConstantBinary) value));
+         subValues.add(new ProgramValue.ProgramValueConstantBinaryRight((ConstantBinary) value));
       } else if(value instanceof ConstantUnary) {
-         subValues.add(new ProgramValue.ConstantUnaryValue((ConstantUnary) value));
+         subValues.add(new ProgramValue.ProgramValueConstantUnaryValue((ConstantUnary) value));
       } else if(value instanceof ArrayFilled) {
-         subValues.add(new ProgramValue.ArrayFilledSize((ArrayFilled) value));
+         subValues.add(new ProgramValue.ProgramValueArrayFilledSize((ArrayFilled) value));
       } else if(value instanceof ConstantArrayFilled) {
-         subValues.add(new ProgramValue.ConstantArrayFilledSize((ConstantArrayFilled) value));
+         subValues.add(new ProgramValue.ProgramValueConstantArrayFilledSize((ConstantArrayFilled) value));
       } else if(value instanceof LvalueIntermediate) {
-         subValues.add(new ProgramValue.LValueIntermediateVariable((LvalueIntermediate) value));
+         subValues.add(new ProgramValue.ProgramValueLValueIntermediateVariable((LvalueIntermediate) value));
       } else if(value == null ||
             value instanceof VariableRef ||
             value instanceof ProcedureRef ||
             value instanceof ConstantLiteral ||
             value instanceof ConstantRef ||
+            value instanceof StructZero ||
             value instanceof LabelRef
             ) {
          // No sub values

src/main/java/dk/camelot64/kickc/model/operators/OperatorAddressOf.java

@@ -4,7 +4,6 @@ import dk.camelot64.kickc.model.ConstantNotLiteral;
 import dk.camelot64.kickc.model.symbols.ProgramScope;
 import dk.camelot64.kickc.model.types.SymbolType;
 import dk.camelot64.kickc.model.types.SymbolTypePointer;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 
 /** Unary Address-of Operator (&p) */
@@ -20,7 +19,7 @@ public class OperatorAddressOf extends OperatorUnary {
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple operandType) {
+   public SymbolType inferType(SymbolType operandType) {
       return new SymbolTypePointer(operandType);
    }
 }

src/main/java/dk/camelot64/kickc/model/operators/OperatorAssignment.java

@@ -0,0 +1,25 @@
+package dk.camelot64.kickc.model.operators;
+
+import dk.camelot64.kickc.model.CompileError;
+import dk.camelot64.kickc.model.types.SymbolType;
+import dk.camelot64.kickc.model.values.ConstantLiteral;
+
+/** Binary assignment operator ( x = y ) */
+public class OperatorAssignment extends OperatorBinary {
+
+   public OperatorAssignment(int precedence) {
+      super("=", "_assign_", precedence);
+   }
+
+   @Override
+   public ConstantLiteral calculateLiteral(ConstantLiteral left, ConstantLiteral right) {
+      throw new CompileError("Calculation not implemented " + left + " " + getOperator() + " " + right);
+   }
+
+   @Override
+   public SymbolType inferType(SymbolType left, SymbolType right) {
+      return left;
+   }
+
+
+}

src/main/java/dk/camelot64/kickc/model/operators/OperatorBinary.java

@@ -1,7 +1,6 @@
 package dk.camelot64.kickc.model.operators;
 
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 
 /** A binary expression operator */
@@ -25,6 +24,6 @@ public abstract class OperatorBinary extends Operator {
     * @param right The type of the right operand
     * @return The type resulting from applying the operator to the operands
     */
-   public abstract SymbolType inferType(SymbolTypeSimple left, SymbolTypeSimple right);
+   public abstract SymbolType inferType(SymbolType left, SymbolType right);
 
 }

src/main/java/dk/camelot64/kickc/model/operators/OperatorBitwiseAnd.java

@@ -1,10 +1,7 @@
 package dk.camelot64.kickc.model.operators;
 
 import dk.camelot64.kickc.model.CompileError;
-import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeInteger;
-import dk.camelot64.kickc.model.types.SymbolTypePointer;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
+import dk.camelot64.kickc.model.types.*;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 
@@ -24,7 +21,7 @@ public class OperatorBitwiseAnd extends OperatorBinary {
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple type1, SymbolTypeSimple type2) {
+   public SymbolType inferType(SymbolType type1, SymbolType type2) {
       // Handle pointers as words
       if(type1 instanceof SymbolTypePointer) {
          type1 = SymbolType.WORD;
@@ -32,16 +29,12 @@ public class OperatorBitwiseAnd extends OperatorBinary {
       if(type2 instanceof SymbolTypePointer) {
          type2 = SymbolType.WORD;
       }
-      // Find smallest bitwise type
-      if(type1 instanceof SymbolTypeInteger && type2 instanceof SymbolTypeInteger) {
-
-         for(SymbolTypeInteger candidate : SymbolType.getIntegerTypes()) {
-            boolean match1 = ((SymbolTypeInteger) type1).getBits() <= candidate.getBits();
-            boolean match2 = ((SymbolTypeInteger) type2).getBits() <= candidate.getBits();
-            if(!candidate.isSigned() && (match1 || match2)) {
-               return candidate;
-            }
-         }
+      // Handle numeric types
+      if(SymbolType.isInteger(type1) && SymbolType.isInteger(type2)) {
+         if(type1.getSizeBytes()<type2.getSizeBytes())
+            return type1;
+         else
+            return type2;
       }
 
       throw new CompileError("Type inference case not handled " + type1 + " " + getOperator() + " " + type2);

src/main/java/dk/camelot64/kickc/model/operators/OperatorBitwiseNot.java

@@ -3,7 +3,6 @@ package dk.camelot64.kickc.model.operators;
 import dk.camelot64.kickc.model.CompileError;
 import dk.camelot64.kickc.model.symbols.ProgramScope;
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 
@@ -23,7 +22,7 @@ public class OperatorBitwiseNot extends OperatorUnary {
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple operandType) {
+   public SymbolType inferType(SymbolType operandType) {
       return operandType;
    }
 

src/main/java/dk/camelot64/kickc/model/operators/OperatorBitwiseOr.java

@@ -1,10 +1,7 @@
 package dk.camelot64.kickc.model.operators;
 
 import dk.camelot64.kickc.model.CompileError;
-import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeInteger;
-import dk.camelot64.kickc.model.types.SymbolTypePointer;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
+import dk.camelot64.kickc.model.types.*;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 
@@ -24,7 +21,7 @@ public class OperatorBitwiseOr extends OperatorBinary {
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple type1, SymbolTypeSimple type2) {
+   public SymbolType inferType(SymbolType type1, SymbolType type2) {
       // Handle pointers as words
       if(type1 instanceof SymbolTypePointer) {
          type1 = SymbolType.WORD;
@@ -32,9 +29,9 @@ public class OperatorBitwiseOr extends OperatorBinary {
       if(type2 instanceof SymbolTypePointer) {
          type2 = SymbolType.WORD;
       }
-      // Handle numeric types through proper promotion
+      // Handle numeric types
       if(SymbolType.isInteger(type1) && SymbolType.isInteger(type2)) {
-         return SymbolType.promotedBitwiseType((SymbolTypeInteger) type1, (SymbolTypeInteger) type2);
+         return SymbolTypeConversion.convertedMathType((SymbolTypeInteger) type1, (SymbolTypeInteger) type2);
       }
       throw new CompileError("Type inference case not handled " + type1 + " " + getOperator() + " " + type2);
    }

src/main/java/dk/camelot64/kickc/model/operators/OperatorBitwiseXor.java

@@ -1,10 +1,7 @@
 package dk.camelot64.kickc.model.operators;
 
 import dk.camelot64.kickc.model.CompileError;
-import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeInteger;
-import dk.camelot64.kickc.model.types.SymbolTypePointer;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
+import dk.camelot64.kickc.model.types.*;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 
@@ -24,7 +21,7 @@ public class OperatorBitwiseXor extends OperatorBinary {
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple type1, SymbolTypeSimple type2) {
+   public SymbolType inferType(SymbolType type1, SymbolType type2) {
       // Handle pointers as words
       if(type1 instanceof SymbolTypePointer) {
          type1 = SymbolType.WORD;
@@ -32,9 +29,9 @@ public class OperatorBitwiseXor extends OperatorBinary {
       if(type2 instanceof SymbolTypePointer) {
          type2 = SymbolType.WORD;
       }
-      // Handle numeric types through proper promotion
+      // Handle numeric types
       if(SymbolType.isInteger(type1) && SymbolType.isInteger(type2)) {
-         return SymbolType.promotedBitwiseType((SymbolTypeInteger) type1, (SymbolTypeInteger) type2);
+         return SymbolTypeConversion.convertedMathType((SymbolTypeInteger) type1, (SymbolTypeInteger) type2);
       }
       throw new CompileError("Type inference case not handled " + type1 + " " + getOperator() + " " + type2);
    }

src/main/java/dk/camelot64/kickc/model/operators/OperatorCast.java

@@ -0,0 +1,18 @@
+package dk.camelot64.kickc.model.operators;
+
+import dk.camelot64.kickc.model.types.SymbolType;
+
+/** Abstract cast operator. */
+public abstract class OperatorCast extends OperatorUnary {
+
+   private SymbolType toType;
+
+   public OperatorCast(String operator, String asmOperator, int precedence, SymbolType toType) {
+      super(operator, asmOperator, precedence);
+      this.toType = toType;
+   }
+
+   public SymbolType getToType() {
+      return toType;
+   }
+}

src/main/java/dk/camelot64/kickc/model/operators/OperatorCastBool.java

@@ -3,16 +3,15 @@ package dk.camelot64.kickc.model.operators;
 import dk.camelot64.kickc.model.CompileError;
 import dk.camelot64.kickc.model.symbols.ProgramScope;
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 import dk.camelot64.kickc.model.values.ConstantPointer;
 
 /** Unary Cast to boolean operator ( (boolean) x ) */
-public class OperatorCastBool extends OperatorUnary {
+public class OperatorCastBool extends OperatorCast  {
 
    public OperatorCastBool(int precedence) {
-      super("((bool))", "_bool_", precedence);
+      super("((bool))", "_bool_", precedence, SymbolType.BOOLEAN);
    }
 
    @Override
@@ -26,7 +25,7 @@ public class OperatorCastBool extends OperatorUnary {
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple operandType) {
+   public SymbolType inferType(SymbolType operandType) {
       return SymbolType.BOOLEAN;
    }
 }

src/main/java/dk/camelot64/kickc/model/operators/OperatorCastByte.java

@@ -3,30 +3,29 @@ package dk.camelot64.kickc.model.operators;
 import dk.camelot64.kickc.model.CompileError;
 import dk.camelot64.kickc.model.symbols.ProgramScope;
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 import dk.camelot64.kickc.model.values.ConstantPointer;
 
 /** Unary Cast to byte operator ( (byte) x ) */
-public class OperatorCastByte extends OperatorUnary {
+public class OperatorCastByte extends OperatorCast {
 
    public OperatorCastByte(int precedence) {
-      super("((byte))", "_byte_", precedence);
+      super("((byte))", "_byte_", precedence, SymbolType.BYTE);
    }
 
    @Override
    public ConstantLiteral calculateLiteral(ConstantLiteral value, ProgramScope scope) {
       if(value instanceof ConstantInteger) {
-         return new ConstantInteger(0xff & ((ConstantInteger) value).getValue());
+         return new ConstantInteger(0xff & ((ConstantInteger) value).getValue(), SymbolType.BYTE);
       } else if(value instanceof ConstantPointer) {
-         return new ConstantInteger(0xff & ((ConstantPointer) value).getLocation());
+         return new ConstantInteger(0xff & ((ConstantPointer) value).getLocation(), SymbolType.BYTE);
       }
       throw new CompileError("Calculation not implemented " + getOperator() + " " + value );
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple operandType) {
+   public SymbolType inferType(SymbolType operandType) {
       return SymbolType.BYTE;
    }
 }

src/main/java/dk/camelot64/kickc/model/operators/OperatorCastDWord.java

@@ -3,32 +3,31 @@ package dk.camelot64.kickc.model.operators;
 import dk.camelot64.kickc.model.CompileError;
 import dk.camelot64.kickc.model.symbols.ProgramScope;
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 import dk.camelot64.kickc.model.values.ConstantPointer;
 
 /** Unary Cast to double word operator ( (dword) x ) */
-public class OperatorCastDWord extends OperatorUnary {
+public class OperatorCastDWord extends OperatorCast {
 
    public OperatorCastDWord(int precedence) {
-      super("((dword))", "_dword_", precedence);
+      super("((dword))", "_dword_", precedence, SymbolType.DWORD);
    }
 
    @Override
    public ConstantLiteral calculateLiteral(ConstantLiteral value, ProgramScope scope) {
       if(value instanceof ConstantInteger) {
-         return new ConstantInteger(0xffffffffL & ((ConstantInteger) value).getValue());
+         return new ConstantInteger(0xffffffffL & ((ConstantInteger) value).getValue(), SymbolType.DWORD);
       }
       if(value instanceof ConstantPointer) {
-         return new ConstantInteger(0xffff & ((ConstantPointer) value).getLocation());
+         return new ConstantInteger(0xffff & ((ConstantPointer) value).getLocation(), SymbolType.DWORD);
       }
       throw new CompileError("Calculation not implemented " + getOperator() + " " + value );
    }
 
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple operandType) {
+   public SymbolType inferType(SymbolType operandType) {
       return SymbolType.DWORD;
    }
 }

src/main/java/dk/camelot64/kickc/model/operators/OperatorCastPtr.java

@@ -4,18 +4,17 @@ import dk.camelot64.kickc.model.CompileError;
 import dk.camelot64.kickc.model.symbols.ProgramScope;
 import dk.camelot64.kickc.model.types.SymbolType;
 import dk.camelot64.kickc.model.types.SymbolTypePointer;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 import dk.camelot64.kickc.model.values.ConstantPointer;
 
 /** Unary Cast to a pointer ( type* ) */
-public class OperatorCastPtr extends OperatorUnary {
+public class OperatorCastPtr extends OperatorCast {
 
    private final SymbolType elementType;
 
    public OperatorCastPtr(int precedence, SymbolType elementType) {
-      super("((" + elementType.toString() + "*))", "_ptr_", precedence);
+      super("((" + elementType.toString() + "*))", "_ptr_", precedence, new SymbolTypePointer(elementType));
       this.elementType = elementType;
    }
 
@@ -33,7 +32,7 @@ public class OperatorCastPtr extends OperatorUnary {
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple operandType) {
+   public SymbolType inferType(SymbolType operandType) {
       return new SymbolTypePointer(elementType);
    }
 

src/main/java/dk/camelot64/kickc/model/operators/OperatorCastSByte.java

@@ -3,27 +3,26 @@ package dk.camelot64.kickc.model.operators;
 import dk.camelot64.kickc.model.CompileError;
 import dk.camelot64.kickc.model.symbols.ProgramScope;
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 
 /** Unary Cast to signed byte operator ( (signed byte) x ) */
-public class OperatorCastSByte extends OperatorUnary {
+public class OperatorCastSByte extends OperatorCast {
 
    public OperatorCastSByte(int precedence) {
-      super("((signed byte))", "_sbyte_", precedence);
+      super("((signed byte))", "_sbyte_", precedence, SymbolType.SBYTE);
    }
 
    @Override
    public ConstantLiteral calculateLiteral(ConstantLiteral value, ProgramScope scope) {
       if(value instanceof ConstantInteger) {
-         return new ConstantInteger(0xff & ((ConstantInteger) value).getValue());
+         return new ConstantInteger(0xff & ((ConstantInteger) value).getValue(), SymbolType.SBYTE);
       }
       throw new CompileError("Calculation not implemented " + getOperator() + " " + value );
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple operandType) {
+   public SymbolType inferType(SymbolType operandType) {
       return SymbolType.SBYTE;
    }
 }

src/main/java/dk/camelot64/kickc/model/operators/OperatorCastSDWord.java

@@ -3,27 +3,26 @@ package dk.camelot64.kickc.model.operators;
 import dk.camelot64.kickc.model.CompileError;
 import dk.camelot64.kickc.model.symbols.ProgramScope;
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 
 /** Unary Cast to signed double word operator ( (signed dword) x ) */
-public class OperatorCastSDWord extends OperatorUnary {
+public class OperatorCastSDWord extends OperatorCast {
 
    public OperatorCastSDWord(int precedence) {
-      super("((signed dword))", "_sdword_", precedence);
+      super("((signed dword))", "_sdword_", precedence, SymbolType.SDWORD);
    }
 
    @Override
    public ConstantLiteral calculateLiteral(ConstantLiteral value, ProgramScope scope) {
       if(value instanceof ConstantInteger) {
-         return new ConstantInteger(0xffffffffL & ((ConstantInteger) value).getValue());
+         return new ConstantInteger(0xffffffffL & ((ConstantInteger) value).getValue(), SymbolType.SDWORD);
       }
       throw new CompileError("Calculation not implemented " + getOperator() + " " + value );
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple operandType) {
+   public SymbolType inferType(SymbolType operandType) {
       return SymbolType.SDWORD;
    }
 }

src/main/java/dk/camelot64/kickc/model/operators/OperatorCastSNumber.java

@@ -0,0 +1,27 @@
+package dk.camelot64.kickc.model.operators;
+
+import dk.camelot64.kickc.model.CompileError;
+import dk.camelot64.kickc.model.symbols.ProgramScope;
+import dk.camelot64.kickc.model.types.SymbolType;
+import dk.camelot64.kickc.model.values.ConstantInteger;
+import dk.camelot64.kickc.model.values.ConstantLiteral;
+
+/** Unary Cast to signed number  operator ( (snumber) x ) */
+public class OperatorCastSNumber extends OperatorCast {
+
+   public OperatorCastSNumber(int precedence) {
+      super("((snumber))", "_snumber_", precedence, SymbolType.SNUMBER);
+   }
+
+   @Override
+   public ConstantLiteral calculateLiteral(ConstantLiteral value, ProgramScope scope) {
+      if(value instanceof ConstantInteger)
+         return new ConstantInteger(((ConstantInteger) value).getValue(), SymbolType.SNUMBER);
+      throw new CompileError("Calculation not implemented " + getOperator() + " " + value );
+   }
+
+   @Override
+   public SymbolType inferType(SymbolType operandType) {
+      return SymbolType.SNUMBER;
+   }
+}

src/main/java/dk/camelot64/kickc/model/operators/OperatorCastSWord.java

@@ -3,27 +3,26 @@ package dk.camelot64.kickc.model.operators;
 import dk.camelot64.kickc.model.CompileError;
 import dk.camelot64.kickc.model.symbols.ProgramScope;
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 
 /** Unary Cast to signed word operator ( (signed word) x ) */
-public class OperatorCastSWord extends OperatorUnary {
+public class OperatorCastSWord extends OperatorCast {
 
    public OperatorCastSWord(int precedence) {
-      super("((signed word))", "_sword_", precedence);
+      super("((signed word))", "_sword_", precedence, SymbolType.SWORD);
    }
 
    @Override
    public ConstantLiteral calculateLiteral(ConstantLiteral value, ProgramScope scope) {
       if(value instanceof ConstantInteger) {
-         return new ConstantInteger(0xffff & ((ConstantInteger) value).getValue());
+         return new ConstantInteger(0xffff & ((ConstantInteger) value).getValue(), SymbolType.SWORD);
       }
       throw new CompileError("Calculation not implemented " + getOperator() + " " + value );
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple operandType) {
+   public SymbolType inferType(SymbolType operandType) {
       return SymbolType.SWORD;
    }
 }

src/main/java/dk/camelot64/kickc/model/operators/OperatorCastUNumber.java

@@ -0,0 +1,27 @@
+package dk.camelot64.kickc.model.operators;
+
+import dk.camelot64.kickc.model.CompileError;
+import dk.camelot64.kickc.model.symbols.ProgramScope;
+import dk.camelot64.kickc.model.types.SymbolType;
+import dk.camelot64.kickc.model.values.ConstantInteger;
+import dk.camelot64.kickc.model.values.ConstantLiteral;
+
+/** Unary Cast to unsigned number  operator ( (unumber) x ) */
+public class OperatorCastUNumber extends OperatorCast {
+
+   public OperatorCastUNumber(int precedence) {
+      super("((unumber))", "_unumber_", precedence, SymbolType.UNUMBER);
+   }
+
+   @Override
+   public ConstantLiteral calculateLiteral(ConstantLiteral value, ProgramScope scope) {
+      if(value instanceof ConstantInteger)
+         return new ConstantInteger(((ConstantInteger) value).getValue(), SymbolType.UNUMBER);
+      throw new CompileError("Calculation not implemented " + getOperator() + " " + value );
+   }
+
+   @Override
+   public SymbolType inferType(SymbolType operandType) {
+      return SymbolType.UNUMBER;
+   }
+}

src/main/java/dk/camelot64/kickc/model/operators/OperatorCastWord.java

@@ -3,31 +3,30 @@ package dk.camelot64.kickc.model.operators;
 import dk.camelot64.kickc.model.CompileError;
 import dk.camelot64.kickc.model.symbols.ProgramScope;
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 import dk.camelot64.kickc.model.values.ConstantPointer;
 
 /** Unary Cast to word operator ( (word) x ) */
-public class OperatorCastWord extends OperatorUnary {
+public class OperatorCastWord extends OperatorCast {
 
    public OperatorCastWord(int precedence) {
-      super("((word))", "_word_", precedence);
+      super("((word))", "_word_", precedence, SymbolType.WORD);
    }
 
    @Override
    public ConstantLiteral calculateLiteral(ConstantLiteral value, ProgramScope scope) {
       if(value instanceof ConstantInteger) {
-         return new ConstantInteger(0xffff & ((ConstantInteger) value).getValue());
+         return new ConstantInteger(0xffff & ((ConstantInteger) value).getValue(), SymbolType.WORD);
       }
       if(value instanceof ConstantPointer) {
-         return new ConstantInteger(0xffff & ((ConstantPointer) value).getLocation());
+         return new ConstantInteger(0xffff & ((ConstantPointer) value).getLocation(), SymbolType.WORD);
       }
       throw new CompileError("Calculation not implemented " + getOperator() + " " + value );
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple operandType) {
+   public SymbolType inferType(SymbolType operandType) {
       return SymbolType.WORD;
    }
 }

src/main/java/dk/camelot64/kickc/model/operators/OperatorDWord.java

@@ -4,7 +4,6 @@ import dk.camelot64.kickc.model.CompileError;
 import dk.camelot64.kickc.model.types.NoMatchingType;
 import dk.camelot64.kickc.model.types.SymbolType;
 import dk.camelot64.kickc.model.types.SymbolTypePointer;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 
@@ -24,7 +23,7 @@ public class OperatorDWord extends OperatorBinary {
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple left, SymbolTypeSimple right) {
+   public SymbolType inferType(SymbolType left, SymbolType right) {
       // Handle pointers as words
       if(left instanceof SymbolTypePointer) {
          left = SymbolType.WORD;
@@ -32,13 +31,13 @@ public class OperatorDWord extends OperatorBinary {
       if(right instanceof SymbolTypePointer) {
          right = SymbolType.WORD;
       }
-      if(SymbolType.isByte(left)) {
+      if(SymbolType.BYTE.equals(left)) {
          left = SymbolType.WORD;
       }
-      if(SymbolType.isByte(right)) {
+      if(SymbolType.BYTE.equals(right)) {
          right = SymbolType.WORD;
       }
-      if(SymbolType.isWord(left) && SymbolType.isWord(right)) {
+      if(SymbolType.WORD.equals(left) && SymbolType.WORD.equals(right)) {
          return SymbolType.DWORD;
       }
       throw new NoMatchingType("DWord constructor cannot use " + left + " " + getOperator() + " " + right);

src/main/java/dk/camelot64/kickc/model/operators/OperatorDecrement.java

@@ -1,9 +1,8 @@
 package dk.camelot64.kickc.model.operators;
 
-import dk.camelot64.kickc.model.CompileError;
+import dk.camelot64.kickc.model.ConstantNotLiteral;
 import dk.camelot64.kickc.model.symbols.ProgramScope;
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 
@@ -19,11 +18,11 @@ public class OperatorDecrement extends OperatorUnary {
       if(operand instanceof ConstantInteger ) {
          return new ConstantInteger(((ConstantInteger) operand).getInteger() -1);
       }
-      throw new CompileError("Calculation not implemented " + getOperator() + " " + operand );
+      throw new ConstantNotLiteral("Calculation not literal " + getOperator() + " " + operand );
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple operandType) {
+   public SymbolType inferType(SymbolType operandType) {
       return operandType;
    }
 }

src/main/java/dk/camelot64/kickc/model/operators/OperatorDeref.java

@@ -4,7 +4,6 @@ import dk.camelot64.kickc.model.CompileError;
 import dk.camelot64.kickc.model.symbols.ProgramScope;
 import dk.camelot64.kickc.model.types.SymbolType;
 import dk.camelot64.kickc.model.types.SymbolTypePointer;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 
 /** Unary Pointer Dereference Operator (*p) */
@@ -20,7 +19,7 @@ public class OperatorDeref extends OperatorUnary {
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple operandType) {
+   public SymbolType inferType(SymbolType operandType) {
       if(operandType instanceof SymbolTypePointer) {
          return ((SymbolTypePointer) operandType).getElementType();
       }

src/main/java/dk/camelot64/kickc/model/operators/OperatorDerefIdx.java

@@ -3,7 +3,6 @@ package dk.camelot64.kickc.model.operators;
 import dk.camelot64.kickc.model.CompileError;
 import dk.camelot64.kickc.model.types.SymbolType;
 import dk.camelot64.kickc.model.types.SymbolTypePointer;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 
 /** Binary Pointer Dereference with an index Operator ( p[i] / *(p+i) ) */
@@ -19,7 +18,7 @@ public class OperatorDerefIdx extends OperatorBinary {
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple left, SymbolTypeSimple right) {
+   public SymbolType inferType(SymbolType left, SymbolType right) {
       if(left instanceof SymbolTypePointer) {
          return ((SymbolTypePointer) left).getElementType();
       }

src/main/java/dk/camelot64/kickc/model/operators/OperatorDivide.java

@@ -27,18 +27,17 @@ public class OperatorDivide extends OperatorBinary {
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple left, SymbolTypeSimple right) {
+   public SymbolType inferType(SymbolType left, SymbolType right) {
       if(left instanceof SymbolTypePointer) {
-         if(SymbolType.isByte(right) || SymbolType.isWord(right)) {
+         if(SymbolType.BYTE.equals(right) || SymbolType.WORD.equals(right) || SymbolType.NUMBER.equals(right)|| SymbolType.UNUMBER.equals(right)|| SymbolType.SNUMBER.equals(right)) {
             return left;
          } else {
             throw new NoMatchingType("Cannot divide pointer by "+right.toString());
-
          }
       }
       // Handle numeric types through proper promotion
       if(SymbolType.isInteger(left) && SymbolType.isInteger(right)) {
-         return SymbolType.promotedMathType((SymbolTypeInteger) left, (SymbolTypeInteger) right);
+         return SymbolTypeConversion.convertedMathType( (SymbolTypeInteger) left, (SymbolTypeInteger)right);
       }
 
       throw new RuntimeException("Type inference case not handled " + left + " " + getOperator() + " " + right);

src/main/java/dk/camelot64/kickc/model/operators/OperatorEqual.java

@@ -2,7 +2,6 @@ package dk.camelot64.kickc.model.operators;
 
 import dk.camelot64.kickc.model.CompileError;
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantBool;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
@@ -25,7 +24,7 @@ public class OperatorEqual extends OperatorBinary {
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple left, SymbolTypeSimple right) {
+   public SymbolType inferType(SymbolType left, SymbolType right) {
       return SymbolType.BOOLEAN;
    }
 

src/main/java/dk/camelot64/kickc/model/operators/OperatorGetHigh.java

@@ -5,7 +5,6 @@ import dk.camelot64.kickc.model.ConstantNotLiteral;
 import dk.camelot64.kickc.model.symbols.ProgramScope;
 import dk.camelot64.kickc.model.types.SymbolType;
 import dk.camelot64.kickc.model.types.SymbolTypePointer;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 import dk.camelot64.kickc.model.values.ConstantPointer;
@@ -22,10 +21,14 @@ public class OperatorGetHigh extends OperatorUnary {
    public ConstantLiteral calculateLiteral(ConstantLiteral operand, ProgramScope scope) {
       if(operand instanceof ConstantInteger) {
          ConstantInteger operandInt = (ConstantInteger) operand;
-         if(SymbolType.isWord(operandInt.getType()) || SymbolType.isSWord(operandInt.getType())) {
+         if(SymbolType.WORD.equals(operandInt.getType()) || SymbolType.SWORD.equals(operandInt.getType())) {
             return new ConstantInteger(operandInt.getInteger()>>8);
-         } else if(SymbolType.isDWord(operandInt.getType()) || SymbolType.isSDWord(operandInt.getType())) {
+         } else if(SymbolType.DWORD.equals(operandInt.getType()) || SymbolType.SDWORD.equals(operandInt.getType())) {
             return new ConstantInteger(operandInt.getInteger()>>16);
+         } else if(SymbolType.BYTE.equals(operandInt.getType()) || SymbolType.SBYTE.equals(operandInt.getType())) {
+            return new ConstantInteger(0L, SymbolType.BYTE);
+         } else if(SymbolType.NUMBER.equals(operandInt.getType())) {
+            throw new ConstantNotLiteral("Operand not resolved "+operand);
          }
       } else if(operand instanceof ConstantPointer) {
          return new ConstantInteger(((ConstantPointer) operand).getLocation()>>8);
@@ -36,13 +39,21 @@ public class OperatorGetHigh extends OperatorUnary {
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple operandType) {
-      if(operandType instanceof SymbolTypePointer || SymbolType.isWord(operandType) || SymbolType.isSWord(operandType)) {
+   public SymbolType inferType(SymbolType operandType) {
+      if(operandType instanceof SymbolTypePointer || SymbolType.WORD.equals(operandType) || SymbolType.SWORD.equals(operandType)) {
          return SymbolType.BYTE;
-      } else if(SymbolType.isDWord(operandType) || SymbolType.isSDWord(operandType)) {
+      } else if(SymbolType.DWORD.equals(operandType) || SymbolType.SDWORD.equals(operandType)) {
          return SymbolType.WORD;
+      } else if(SymbolType.BYTE.equals(operandType) || SymbolType.SBYTE.equals(operandType)) {
+         return SymbolType.BYTE;
       } else if(SymbolType.STRING.equals(operandType)) {
          return SymbolType.BYTE;
+      } else if(SymbolType.NUMBER.equals(operandType)) {
+         return SymbolType.NUMBER;
+      } else if(SymbolType.UNUMBER.equals(operandType)) {
+         return SymbolType.UNUMBER;
+      } else if(SymbolType.SNUMBER.equals(operandType)) {
+         return SymbolType.UNUMBER;
       }
       throw new CompileError("Type inference not implemented "+getOperator()+" "+operandType);
    }

src/main/java/dk/camelot64/kickc/model/operators/OperatorGetLow.java

@@ -5,7 +5,6 @@ import dk.camelot64.kickc.model.ConstantNotLiteral;
 import dk.camelot64.kickc.model.symbols.ProgramScope;
 import dk.camelot64.kickc.model.types.SymbolType;
 import dk.camelot64.kickc.model.types.SymbolTypePointer;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 import dk.camelot64.kickc.model.values.ConstantPointer;
@@ -22,27 +21,39 @@ public class OperatorGetLow extends OperatorUnary {
    public ConstantLiteral calculateLiteral(ConstantLiteral operand, ProgramScope scope) {
       if(operand instanceof ConstantInteger) {
          ConstantInteger operandInt = (ConstantInteger) operand;
-         if(SymbolType.isWord(operandInt.getType()) || SymbolType.isSWord(operandInt.getType())) {
+         if(SymbolType.WORD.equals(operandInt.getType()) || SymbolType.SWORD.equals(operandInt.getType())) {
             return new ConstantInteger(operandInt.getInteger()&0xff);
-         } else if(SymbolType.isDWord(operandInt.getType()) || SymbolType.isSDWord(operandInt.getType())) {
+         } else if(SymbolType.DWORD.equals(operandInt.getType()) || SymbolType.SDWORD.equals(operandInt.getType())) {
             return new ConstantInteger(operandInt.getInteger()&0xffff);
+         } else if(SymbolType.BYTE.equals(operandInt.getType()) || SymbolType.SBYTE.equals(operandInt.getType())) {
+            return operandInt;
+         } else if(SymbolType.NUMBER.equals(operandInt.getType())) {
+            throw new ConstantNotLiteral("Operand not resolved "+operand);
          }
       } else if(operand instanceof ConstantPointer) {
          return new ConstantInteger(((ConstantPointer) operand).getLocation()&0xff);
       } else if(operand instanceof ConstantString) {
          throw new ConstantNotLiteral("address of string is not literal");
       }
-      throw new CompileError("Calculation not implemented " + getOperator() + " " + operand );
+      throw new ConstantNotLiteral("Calculation not implemented " + getOperator() + " " + operand );
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple operandType) {
-      if(operandType instanceof SymbolTypePointer || SymbolType.isWord(operandType) || SymbolType.isSWord(operandType)) {
+   public SymbolType inferType(SymbolType operandType) {
+      if(operandType instanceof SymbolTypePointer || SymbolType.WORD.equals(operandType) || SymbolType.SWORD.equals(operandType)) {
          return SymbolType.BYTE;
-      } else if(SymbolType.isDWord(operandType) || SymbolType.isSDWord(operandType)) {
+      } else if(SymbolType.DWORD.equals(operandType) || SymbolType.SDWORD.equals(operandType)) {
          return SymbolType.WORD;
+      } else if(SymbolType.BYTE.equals(operandType) || SymbolType.SBYTE.equals(operandType)) {
+         return SymbolType.BYTE;
       } else if(SymbolType.STRING.equals(operandType)) {
          return SymbolType.BYTE;
+      } else if(SymbolType.NUMBER.equals(operandType)) {
+         return SymbolType.NUMBER;
+      } else if(SymbolType.UNUMBER.equals(operandType)) {
+         return SymbolType.UNUMBER;
+      } else if(SymbolType.SNUMBER.equals(operandType)) {
+         return SymbolType.UNUMBER;
       }
       throw new CompileError("Type inference not implemented "+getOperator()+" "+operandType);
    }

src/main/java/dk/camelot64/kickc/model/operators/OperatorGreaterThan.java

@@ -2,7 +2,6 @@ package dk.camelot64.kickc.model.operators;
 
 import dk.camelot64.kickc.model.CompileError;
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantBool;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
@@ -23,7 +22,7 @@ public class OperatorGreaterThan extends OperatorBinary {
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple left, SymbolTypeSimple right) {
+   public SymbolType inferType(SymbolType left, SymbolType right) {
       return SymbolType.BOOLEAN;
    }
 

src/main/java/dk/camelot64/kickc/model/operators/OperatorGreaterThanEqual.java

@@ -2,7 +2,6 @@ package dk.camelot64.kickc.model.operators;
 
 import dk.camelot64.kickc.model.CompileError;
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantBool;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
@@ -23,7 +22,7 @@ public class OperatorGreaterThanEqual extends OperatorBinary {
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple left, SymbolTypeSimple right) {
+   public SymbolType inferType(SymbolType left, SymbolType right) {
       return SymbolType.BOOLEAN;
    }
 

src/main/java/dk/camelot64/kickc/model/operators/OperatorIncrement.java

@@ -1,9 +1,8 @@
 package dk.camelot64.kickc.model.operators;
 
-import dk.camelot64.kickc.model.CompileError;
+import dk.camelot64.kickc.model.ConstantNotLiteral;
 import dk.camelot64.kickc.model.symbols.ProgramScope;
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 import dk.camelot64.kickc.model.values.ConstantPointer;
@@ -22,11 +21,11 @@ public class OperatorIncrement extends OperatorUnary {
       } else if(operand instanceof ConstantPointer) {
          return new ConstantPointer(((ConstantPointer) operand).getLocation()+1, ((ConstantPointer) operand).getElementType());
       }
-      throw new CompileError("Calculation not implemented " + getOperator() + " " + operand );
+      throw new ConstantNotLiteral("Calculation not literal " + getOperator() + " " + operand );
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple operandType) {
+   public SymbolType inferType(SymbolType operandType) {
       return operandType;
    }
 }

src/main/java/dk/camelot64/kickc/model/operators/OperatorLessThan.java

@@ -2,7 +2,6 @@ package dk.camelot64.kickc.model.operators;
 
 import dk.camelot64.kickc.model.CompileError;
 import dk.camelot64.kickc.model.types.SymbolType;
-import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantBool;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
@@ -23,7 +22,7 @@ public class OperatorLessThan extends OperatorBinary {
    }
 
    @Override
-   public SymbolType inferType(SymbolTypeSimple left, SymbolTypeSimple right) {
+   public SymbolType inferType(SymbolType left, SymbolType right) {
       return SymbolType.BOOLEAN;
    }