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renames
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@ -209,7 +209,7 @@ public class Compiler {
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private void pass4RegisterAllocation(Program program) {
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new Pass4ZeroPageAllocation(program).allocate();
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new Pass4LiveRangeEquivalenceClassesFinalize(program).allocate();
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new Pass4RegistersFinalize(program).allocate(true);
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// Initial Code generation
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@ -6,11 +6,11 @@ import java.util.ArrayList;
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import java.util.List;
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/**
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* Zero Page Register Allocation for variables based on live ranges and phi equivalence classes.
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* Finalize live range equivalence classes ensuring that all variables is in an equivalence class
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*/
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public class Pass4ZeroPageAllocation extends Pass2Base {
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public class Pass4LiveRangeEquivalenceClassesFinalize extends Pass2Base {
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public Pass4ZeroPageAllocation(Program program) {
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public Pass4LiveRangeEquivalenceClassesFinalize(Program program) {
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super(program);
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}
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@ -33,14 +33,6 @@ public class Pass4ZeroPageAllocation extends Pass2Base {
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getLog().append(liveRangeEquivalenceClass.toString());
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}
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// Allocate zeropage registers to equivalence classes
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// for (LiveRangeEquivalenceClass liveRangeEquivalenceClass : liveRangeEquivalenceClassSet.getEquivalenceClasses()) {
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// List<VariableRef> variables = liveRangeEquivalenceClass.getVariables();
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// Variable firstVar = getProgram().getScope().getVariable(variables.get(0));
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// RegisterAllocation.Register zpRegister = allocateNewRegisterZp(firstVar.getType());
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// liveRangeEquivalenceClass.setRegister(zpRegister);
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// getLog().append("Allocated " + zpRegister + " to " + liveRangeEquivalenceClass);
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// }
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getProgram().setLiveRangeEquivalenceClassSet(liveRangeEquivalenceClassSet);
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}
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@ -97,39 +89,4 @@ public class Pass4ZeroPageAllocation extends Pass2Base {
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}
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/**
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* The current zero page used to create new registers when needed.
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*/
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private int currentZp = 2;
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/**
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* Create a new register for a specific variable type.
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*
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* @param varType The variable type to create a register for.
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* The register type created uses one or more zero page locations based on the variable type
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* @return The new zeropage register
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*/
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private RegisterAllocation.Register allocateNewRegisterZp(SymbolType varType) {
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if (varType.equals(SymbolTypeBasic.BYTE)) {
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return new RegisterAllocation.RegisterZpByte(currentZp++);
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} else if (varType.equals(SymbolTypeBasic.WORD)) {
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RegisterAllocation.RegisterZpWord registerZpWord =
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new RegisterAllocation.RegisterZpWord(currentZp);
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currentZp = currentZp + 2;
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return registerZpWord;
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} else if (varType.equals(SymbolTypeBasic.BOOLEAN)) {
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return new RegisterAllocation.RegisterZpBool(currentZp++);
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} else if (varType.equals(SymbolTypeBasic.VOID)) {
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// No need to setRegister register for VOID value
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return null;
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} else if (varType instanceof SymbolTypePointer) {
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RegisterAllocation.RegisterZpPointerByte registerZpPointerByte =
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new RegisterAllocation.RegisterZpPointerByte(currentZp);
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currentZp = currentZp + 2;
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return registerZpPointerByte;
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} else {
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throw new RuntimeException("Unhandled variable type " + varType);
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}
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}
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}
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@ -1,8 +1,6 @@
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byte STAR = 81;
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byte[40*25] SCREEN = $0400;
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main();
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void main() {
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@ -1,8 +1,6 @@
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byte STAR = 81;
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byte[40*25] SCREEN = $0400;
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main();
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void main() {
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