mirror of
https://gitlab.com/camelot/kickc.git
synced 2024-11-03 12:07:26 +00:00
Fixed almost all problems in constant loop head identification. A few program becomes infinite loops - needs fixing! A few also become way to long when rewritten - probably detect & rollback.
This commit is contained in:
jespergravgaard
parent
c63b031dbe
commit
e167f8dce8
@ -306,6 +306,8 @@ public class Compiler {
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optimizations.add(new PassNEliminateUnusedVars(program, true));
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optimizations.add(new Pass2EliminateUnusedBlocks(program));
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optimizations.add(new PassNStatementIndices(program));
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optimizations.add(() -> { program.clearDominators(); return false; });
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optimizations.add(() -> { program.clearLoopSet(); return false; });
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optimizations.add(new Pass2LoopHeadConstantIdentification(program));
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return optimizations;
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}
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@ -22,7 +22,7 @@ public interface BlockSet {
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* @param graph The control flow graph containing the blocks
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* @return The blocks of the loop (in the same order as they appear in the control flow graph.)
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*/
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default public List<ControlFlowBlock> getBlocks(ControlFlowGraph graph) {
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default List<ControlFlowBlock> getBlocks(ControlFlowGraph graph) {
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ArrayList<ControlFlowBlock> controlFlowBlocks = new ArrayList<>();
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for(ControlFlowBlock block : graph.getAllBlocks()) {
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if(getBlocks().contains(block.getLabel())) {
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@ -23,7 +23,6 @@ public class OperatorNotEqual extends OperatorBinary {
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} else if(left instanceof ConstantPointer && right instanceof ConstantPointer) {
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return new ConstantBool(!Objects.equals(((ConstantPointer) left).getLocation(), ((ConstantPointer) right).getLocation()));
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}
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throw new CompileError("Calculation not implemented " + left + " " + getOperator() + " " + right);
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}
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@ -1,19 +1,22 @@
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package dk.camelot64.kickc.passes;
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import dk.camelot64.kickc.model.*;
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import dk.camelot64.kickc.model.iterator.ProgramValueIterator;
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import dk.camelot64.kickc.model.statements.Statement;
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import dk.camelot64.kickc.model.statements.StatementConditionalJump;
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import dk.camelot64.kickc.model.statements.StatementPhiBlock;
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import dk.camelot64.kickc.model.symbols.Scope;
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import dk.camelot64.kickc.model.symbols.Variable;
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import dk.camelot64.kickc.model.values.ConstantValue;
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import dk.camelot64.kickc.model.values.LabelRef;
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import dk.camelot64.kickc.model.values.ScopeRef;
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import dk.camelot64.kickc.model.values.PointerDereference;
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import dk.camelot64.kickc.model.values.VariableRef;
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import dk.camelot64.kickc.passes.utils.Unroller;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.LinkedHashSet;
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import java.util.List;
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import java.util.concurrent.atomic.AtomicBoolean;
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/**
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* Identify loop heads where the condition is constant when examind the first time
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@ -31,8 +34,11 @@ public class Pass2LoopHeadConstantIdentification extends Pass2SsaOptimization {
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for(NaturalLoop loop : loopSet.getLoops()) {
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LabelRef loopHeadRef = loop.getHead();
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ControlFlowBlock loopHeadBlock = getGraph().getBlock(loopHeadRef);
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boolean modified = optimizeLoopHead(loopHeadBlock, loop, variableReferenceInfos);
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//TODO: Fix remaining errors!
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//boolean modified = optimizeLoopHead(loopHeadBlock, loop, variableReferenceInfos);
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boolean modified = false;
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if(modified) {
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getProgram().clearStatementInfos();
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getProgram().clearLoopSet();
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getProgram().clearDominators();
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return true;
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@ -52,7 +58,10 @@ public class Pass2LoopHeadConstantIdentification extends Pass2SsaOptimization {
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condition = (StatementConditionalJump) statement;
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}
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}
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if(isVolatile(condition)) return false;
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Collection<VariableRef> conditionVars = variableReferenceInfos.getUsedVars(condition);
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// Examines if they have constant values in the first iteration
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List<VariableRef> optimizeVars = new ArrayList<>();
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StatementPhiBlock phiBlock = loopHeadBlock.getPhiBlock();
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@ -82,14 +91,50 @@ public class Pass2LoopHeadConstantIdentification extends Pass2SsaOptimization {
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}
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if(doOptimize) {
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// Optimization is a good idea since the condition is completely constant when entering!
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ScopeRef scopeRef = loopHeadBlock.getScope();
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Scope scope = getScope().getScope(scopeRef);
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BlockSet unrollBlocks = () -> {
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LinkedHashSet<LabelRef> blocks = new LinkedHashSet<>();
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blocks.add(loopHeadBlock.getLabel());
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return blocks;
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};
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// TODO: Copy the block and all statements - and redirect the PHI-entry to the copy!
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// Copy the block and all statements - enter through the copy - finish through the original
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Unroller.UnrollStrategy unrollStrategy = new Unroller.UnrollStrategy() {
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@Override
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public TransitionHandling getEntryStrategy(LabelRef from, LabelRef to) {
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if(loop.getBlocks().contains(from)) {
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return TransitionHandling.TO_ORIGINAL;
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} else {
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return TransitionHandling.TO_COPY;
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}
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}
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@Override
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public TransitionHandling getInternalStrategy(LabelRef from, LabelRef to) {
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return TransitionHandling.TO_ORIGINAL;
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}
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};
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Unroller unroller = new Unroller(getProgram(), unrollBlocks, unrollStrategy);
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unroller.unroll();
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return true;
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}
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}
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return false;
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}
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private boolean isVolatile(Statement condition) {
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AtomicBoolean isVol = new AtomicBoolean(false);
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ProgramValueIterator.execute(condition, (programValue, currentStmt, stmtIt, currentBlock) -> {
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if(programValue.get() instanceof PointerDereference) {
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isVol.set(true);
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}
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if(programValue.get() instanceof VariableRef) {
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Variable variable = getScope().getVariable((VariableRef) programValue.get());
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if(variable.isVolatile())
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isVol.set(true);
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}
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}, null, null);
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return isVol.get();
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}
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}
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@ -14,10 +14,7 @@ import dk.camelot64.kickc.model.symbols.VariableIntermediate;
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import dk.camelot64.kickc.model.types.SymbolType;
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import dk.camelot64.kickc.model.types.SymbolTypeInference;
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import dk.camelot64.kickc.model.types.SymbolTypePointer;
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import dk.camelot64.kickc.model.values.ConstantBinary;
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import dk.camelot64.kickc.model.values.ConstantInteger;
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import dk.camelot64.kickc.model.values.ConstantValue;
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import dk.camelot64.kickc.model.values.RValue;
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import dk.camelot64.kickc.model.values.*;
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import java.util.ListIterator;
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@ -44,7 +41,7 @@ public class PassNAddBooleanCasts extends Pass2SsaOptimization {
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if(SymbolType.isInteger(type) || type instanceof SymbolTypePointer) {
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// Found integer condition - add boolean cast
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getLog().append("Warning! Adding boolean cast to non-boolean condition "+rValue2.toString(getProgram()));
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VariableIntermediate tmpVar = addBooleanCast(rValue2, currentStmt, stmtIt, currentBlock);
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VariableIntermediate tmpVar = addBooleanCast(rValue2, type, currentStmt, stmtIt, currentBlock);
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conditionalJump.setrValue2(tmpVar.getRef());
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}
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}
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@ -61,7 +58,8 @@ public class PassNAddBooleanCasts extends Pass2SsaOptimization {
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if(operand instanceof ConstantValue) {
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unaryExpression.setOperand(new ConstantBinary(new ConstantInteger(0L, SymbolType.NUMBER), Operators.NEQ, (ConstantValue) operand));
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} else {
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VariableIntermediate tmpVar = addBooleanCast(operand, currentStmt, stmtIt, currentBlock);
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SymbolType type = SymbolTypeInference.inferType(getScope(), operand);
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VariableIntermediate tmpVar = addBooleanCast(operand, type, currentStmt, stmtIt, currentBlock);
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unaryExpression.setOperand(tmpVar.getRef());
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}
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}
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@ -70,13 +68,19 @@ public class PassNAddBooleanCasts extends Pass2SsaOptimization {
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return false;
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}
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public VariableIntermediate addBooleanCast(RValue rValue, Statement currentStmt, ListIterator<Statement> stmtIt, ControlFlowBlock currentBlock) {
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public VariableIntermediate addBooleanCast(RValue rValue, SymbolType rValueType, Statement currentStmt, ListIterator<Statement> stmtIt, ControlFlowBlock currentBlock) {
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Scope currentScope = getScope().getScope(currentBlock.getScope());
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stmtIt.previous();
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VariableIntermediate tmpVar = currentScope.addVariableIntermediate();
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tmpVar.setTypeInferred(SymbolType.BOOLEAN);
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// Go straight to xxx!=0 instead of casting to bool
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stmtIt.add(new StatementAssignment(tmpVar.getRef(), new ConstantInteger(0L, SymbolType.NUMBER), Operators.NEQ, rValue, currentStmt.getSource(), Comment.NO_COMMENTS));
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ConstantValue nullValue;
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if(rValueType instanceof SymbolTypePointer) {
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nullValue = new ConstantCastValue(rValueType, new ConstantInteger(0L, SymbolType.WORD));
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} else {
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nullValue = new ConstantInteger(0L, SymbolType.NUMBER);
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}
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stmtIt.add(new StatementAssignment(tmpVar.getRef(), nullValue, Operators.NEQ, rValue, currentStmt.getSource(), Comment.NO_COMMENTS));
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stmtIt.next();
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return tmpVar;
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}
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@ -57,6 +57,12 @@ public class Unroller {
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public void unroll() {
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// 0. Prepare for copying by ensuring that all variables defined in the blocks are represented in PHI-blocks of the successors
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prepare();
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if(program.getLog().isVerboseSSAOptimize()) {
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program.getLog().append("CONTROL FLOW GRAPH (PREPARED)");
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program.getLog().append(program.getGraph().toString(program));
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}
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// 1. Create new versions of all symbols assigned inside the loop
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this.varsOriginalToCopied = copyDefinedVars(unrollBlocks, program);
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// 2. Create new labels for all blocks in the loop
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@ -69,35 +75,71 @@ public class Unroller {
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* Ensure that all variables defined inside the blocks to be copied has a PHI in successor blocks.
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*/
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private void prepare() {
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for(VariableRef definedVarRef : getVarsDefinedIn(unrollBlocks, program)) {
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for(VariableRef origVarRef : getVarsDefinedIn(unrollBlocks, program)) {
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// Find out if the variable is ever referenced outside the loop
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if(isReferencedOutside(definedVarRef, unrollBlocks, program)) {
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if(isReferencedOutside(origVarRef, unrollBlocks, program)) {
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// Add any needed PHI-statements to the successors
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for(SuccessorTransition successorTransition : getSuccessorTransitions(unrollBlocks, program.getGraph())) {
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ControlFlowBlock successorBlock = program.getGraph().getBlock(successorTransition.successor);
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StatementPhiBlock phiBlock = successorBlock.getPhiBlock();
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// Create a new version of the variable
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Variable definedVar = program.getScope().getVariable(definedVarRef);
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Variable newVar = ((VariableVersion) definedVar).getVersionOf().createVersion();
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// Replace all references outside the loop to the new version!
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LinkedHashMap<SymbolRef, RValue> aliases = new LinkedHashMap<>();
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aliases.put(definedVarRef, newVar.getRef());
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ProgramValueIterator.execute(program, (programValue, currentStmt, stmtIt, currentBlock) -> {
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if(currentBlock != null) {
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if(!unrollBlocks.getBlocks().contains(currentBlock.getLabel())) {
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new AliasReplacer(aliases).execute(programValue, currentStmt, stmtIt, currentBlock);
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Variable origVar = program.getScope().getVariable(origVarRef);
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Variable newVar;
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if(origVar instanceof VariableVersion) {
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newVar = ((VariableVersion) origVar).getVersionOf().createVersion();
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} else {
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newVar = origVar.getScope().addVariableIntermediate();
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}
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}
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});
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// Replace all references from the new phi and forward
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forwardReplaceAllUsages(successorTransition.successor, origVarRef, newVar.getRef(), new LinkedHashSet<>());
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// Create the new phi-variable in the successor phi block
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StatementPhiBlock.PhiVariable newPhiVar = phiBlock.addPhiVariable(newVar.getRef());
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newPhiVar.setrValue(successorTransition.predecessor, definedVarRef);
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program.getLog().append("Creating PHI for " + definedVarRef.getFullName() + " in block " + successorBlock.getLabel() + " - " + phiBlock.toString(program, false));
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newPhiVar.setrValue(successorTransition.predecessor, origVarRef);
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program.getLog().append("Creating PHI for " + origVarRef.getFullName() + " in block " + successorBlock.getLabel() + " - " + phiBlock.toString(program, false));
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}
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}
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}
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}
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/**
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* Introduces a new version of a variable - and replaces all uses of the old variable with the new one from a specific point in the control flow graph and forward until the old variable is defined.
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* @param blockRef The block to replace the usage from
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* @param origVarRef The original variable
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* @param newVarRef The new variable replacing the original
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* @param visited All blocks that have already been visited.
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*/
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private void forwardReplaceAllUsages(LabelRef blockRef, VariableRef origVarRef, VariableRef newVarRef, Set<LabelRef> visited) {
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VariableReferenceInfos variableReferenceInfos = program.getVariableReferenceInfos();
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LinkedHashMap<SymbolRef, RValue> aliases = new LinkedHashMap<>();
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aliases.put(origVarRef, newVarRef);
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AliasReplacer aliasReplacer = new AliasReplacer(aliases);
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ControlFlowBlock block = program.getGraph().getBlock(blockRef);
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if(block!=null) {
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for(Statement statement : block.getStatements()) {
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Collection<VariableRef> definedVars = variableReferenceInfos.getDefinedVars(statement);
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if(definedVars!=null && definedVars.contains(origVarRef)) {
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// Found definition of the original variable - don't replace any more
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return;
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}
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// Replace any usage in the statement
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ProgramValueIterator.execute(statement, aliasReplacer, null, block);
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}
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}
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visited.add(blockRef);
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if(block!=null) {
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if(block.getConditionalSuccessor() != null && !visited.contains(block.getConditionalSuccessor())) {
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forwardReplaceAllUsages(block.getConditionalSuccessor(), origVarRef, newVarRef, visited);
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}
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if(block.getDefaultSuccessor() != null && !visited.contains(block.getDefaultSuccessor())) {
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forwardReplaceAllUsages(block.getDefaultSuccessor(), origVarRef, newVarRef, visited);
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}
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if(block.getCallSuccessor() != null && !visited.contains(block.getCallSuccessor())) {
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forwardReplaceAllUsages(block.getCallSuccessor(), origVarRef, newVarRef, visited);
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}
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}
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}
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/**
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* Create new versions of all symbols assigned inside some blocks to be unrolled
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*
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@ -182,7 +224,7 @@ public class Unroller {
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// Set default successor for both new & original blocks
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LabelRef origSuccessor = origBlock.getDefaultSuccessor();
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if(unrollBlocks.contains(origSuccessor)) {
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if(isInternal(origSuccessor)) {
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// Default Successor is inside copied blocks - Use strategy to find default successors
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UnrollStrategy.TransitionHandling handling = strategy.getInternalStrategy(origBlock.getLabel(), origSuccessor);
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if(UnrollStrategy.TransitionHandling.TO_COPY.equals(handling)) {
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@ -209,7 +251,7 @@ public class Unroller {
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// Examine whether conditional successor is external
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LabelRef origConditionalSuccessor = origBlock.getConditionalSuccessor();
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if(origConditionalSuccessor != null) {
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if(!unrollBlocks.contains(origConditionalSuccessor)) {
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if(!isInternal(origConditionalSuccessor)) {
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// Update the PHI blocks of the external conditional successor to also get values from the copied PHI block
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patchSuccessorBlockPhi(origConditionalSuccessor, origBlock.getLabel(), newBlockLabel);
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}
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@ -218,8 +260,20 @@ public class Unroller {
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}
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}
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/**
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* Determine if a block is one of the blovks being copied (original or copy)
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*
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* @param block The block to examine
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* @return true if the block is one of the blocks being copied
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*/
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private boolean isInternal(LabelRef block) {
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return unrollBlocks.contains(block) || blocksOriginalToCopied.values().contains(block);
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}
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/**
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* Patch the PHI-block of an external successor block. Ensures that the PHI-block also receives data from the new coped block.
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*
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* @param successor The successor block's label
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* @param origBlock The label of the original block
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* @param newBlock The label of the newly created copy
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@ -275,6 +329,7 @@ public class Unroller {
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/**
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* Create a copy of a conditional jump statement. Also updates the original conditional jump if specified by the strategy.
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*
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* @param origConditional The original conditional jump
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* @param origBlock The block containing the original PHI statement
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* @return The new copied conditional jump statement.
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@ -292,7 +347,7 @@ public class Unroller {
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newConditional.setDeclaredUnroll(origConditional.isDeclaredUnroll());
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// Then make sure the destination is correct in both the original and copy
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LabelRef origSuccessor = origConditional.getDestination();
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if(unrollBlocks.contains(origSuccessor)) {
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if(isInternal(origSuccessor)) {
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// Successor is inside the copied blocks!
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UnrollStrategy.TransitionHandling handling = strategy.getInternalStrategy(origBlock, origSuccessor);
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if(UnrollStrategy.TransitionHandling.TO_COPY.equals(handling)) {
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@ -317,6 +372,7 @@ public class Unroller {
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/**
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* Create a copy of a PHI-statement. Also updates the original PHI-statement if specified by the strategy.
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*
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* @param origPhiBlock The original PHI statement
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* @param origBlock The block containing the original PHI statement
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* @return The new copied PH statement.
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@ -332,7 +388,7 @@ public class Unroller {
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while(origPhiRValuesIt.hasNext()) {
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StatementPhiBlock.PhiRValue origPhiRValue = origPhiRValuesIt.next();
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LabelRef predecessor = origPhiRValue.getPredecessor();
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if(unrollBlocks.contains(predecessor)) {
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if(isInternal(predecessor)) {
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// Predecessor is inside the loop
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UnrollStrategy.TransitionHandling handling = strategy.getInternalStrategy(predecessor, origBlock);
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if(UnrollStrategy.TransitionHandling.TO_COPY.equals(handling)) {
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@ -46,7 +46,6 @@ public class TestPrograms {
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compileAndCompare("global-pc-multiple");
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}
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@Test
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public void testStructPosFill() throws IOException, URISyntaxException {
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compileAndCompare("struct-pos-fill");
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@ -2515,7 +2514,7 @@ public class TestPrograms {
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@Test
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public void testLoopWhileMin() throws IOException, URISyntaxException {
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compileAndCompare("loop-while-min", log().verboseLoopAnalysis());
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compileAndCompare("loop-while-min");
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}
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@Test
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@ -69,10 +69,6 @@ Successful SSA optimization Pass2ConditionalJumpSimplification
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Constant (const byte*) SCREEN#0 = (byte*) 1024
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Constant (const byte) main::i#0 = 0
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Successful SSA optimization Pass2ConstantIdentification
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Found back edge: Loop head: main::@1 tails: main::@2 blocks: null
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Populated: Loop head: main::@1 tails: main::@2 blocks: main::@2 main::@1
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Found back edge: Loop head: main::@1 tails: main::@2 blocks: null
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Populated: Loop head: main::@1 tails: main::@2 blocks: main::@2 main::@1
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Inlining constant with var siblings (const byte) main::i#0
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Constant inlined main::i#0 = (byte) 0
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Successful SSA optimization Pass2ConstantInlining
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@ -118,26 +114,6 @@ main::@2: scope:[main] from main::@1
|
||||
[9] (byte) main::i#1 ← ++ (byte) main::i#2
|
||||
to:main::@1
|
||||
|
||||
DOMINATORS
|
||||
@begin dominated by @begin
|
||||
@1 dominated by @1 @begin
|
||||
@end dominated by @1 @begin @end
|
||||
main dominated by @1 @begin main
|
||||
main::@1 dominated by @1 @begin main::@1 main
|
||||
main::@return dominated by main::@return @1 @begin main::@1 main
|
||||
main::@2 dominated by @1 @begin main::@1 main::@2 main
|
||||
|
||||
NATURAL LOOPS
|
||||
Found back edge: Loop head: main::@1 tails: main::@2 blocks: null
|
||||
Populated: Loop head: main::@1 tails: main::@2 blocks: main::@2 main::@1
|
||||
Loop head: main::@1 tails: main::@2 blocks: main::@2 main::@1
|
||||
|
||||
NATURAL LOOPS WITH DEPTH
|
||||
Found 0 loops in scope []
|
||||
Found 1 loops in scope [main]
|
||||
Loop head: main::@1 tails: main::@2 blocks: main::@2 main::@1
|
||||
Loop head: main::@1 tails: main::@2 blocks: main::@2 main::@1 depth: 1
|
||||
|
||||
|
||||
VARIABLE REGISTER WEIGHTS
|
||||
(byte*) SCREEN
|
||||
|
||||
@ -18,7 +18,7 @@ main: scope:[main] from @1
|
||||
main::@1: scope:[main] from main main::@2
|
||||
[10] (byte) main::idx#5 ← phi( main/(byte) 0 main::@2/(byte) main::idx#4 )
|
||||
[10] (struct Entry*) main::entry#2 ← phi( main/(const struct Entry*) ENTRIES#0 main::@2/(struct Entry*) main::entry#1 )
|
||||
[11] if((byte) 0!=(struct Entry*) main::entry#2) goto main::@2
|
||||
[11] if((struct Entry*)(word) 0!=(struct Entry*) main::entry#2) goto main::@2
|
||||
to:main::@return
|
||||
main::@return: scope:[main] from main::@1
|
||||
[12] return
|
||||
|
||||
@ -49,7 +49,7 @@ main: scope:[main] from @1
|
||||
main::@1: scope:[main] from main main::@2
|
||||
(byte) main::idx#6 ← phi( main/(byte) main::idx#0 main::@2/(byte) main::idx#4 )
|
||||
(struct Entry*) main::entry#2 ← phi( main/(struct Entry*) main::entry#0 main::@2/(struct Entry*) main::entry#1 )
|
||||
(bool~) main::$17 ← (number) 0 != (struct Entry*) main::entry#2
|
||||
(bool~) main::$17 ← (struct Entry*)(word) 0 != (struct Entry*) main::entry#2
|
||||
if((bool~) main::$17) goto main::@2
|
||||
to:main::@return
|
||||
main::@2: scope:[main] from main::@1
|
||||
@ -146,7 +146,6 @@ Adding number conversion cast (unumber) 1 in *((byte*) main::$8) ← (number) 1
|
||||
Adding number conversion cast (unumber) 2 in *((byte*) main::$10) ← (number) 2
|
||||
Adding number conversion cast (unumber) 3 in *((byte*) main::$12) ← (number) 3
|
||||
Adding number conversion cast (unumber) 0 in (byte) main::idx#0 ← (number) 0
|
||||
Adding number conversion cast (unumber) 0 in (bool~) main::$17 ← (number) 0 != (struct Entry*) main::entry#2
|
||||
Successful SSA optimization PassNAddNumberTypeConversions
|
||||
Inlining cast (struct Entry*) ENTRIES#0 ← (struct Entry*)(number) $1000
|
||||
Inlining cast *((byte*) main::$8) ← (unumber)(number) 1
|
||||
@ -165,7 +164,6 @@ Simplifying constant pointer cast (struct Entry*) 0
|
||||
Simplifying constant integer cast 3
|
||||
Simplifying constant pointer cast (byte*) 1024
|
||||
Simplifying constant integer cast 0
|
||||
Simplifying constant integer cast 0
|
||||
Successful SSA optimization PassNCastSimplification
|
||||
Finalized unsigned number type (byte) 1
|
||||
Finalized unsigned number type (byte) 2
|
||||
@ -173,7 +171,6 @@ Finalized unsigned number type (byte) 1
|
||||
Finalized unsigned number type (byte) 2
|
||||
Finalized unsigned number type (byte) 3
|
||||
Finalized unsigned number type (byte) 0
|
||||
Finalized unsigned number type (byte) 0
|
||||
Successful SSA optimization PassNFinalizeNumberTypeConversions
|
||||
Inferred type updated to byte in (unumber~) main::$5 ← (byte) 1 * (const byte) SIZEOF_STRUCT_ENTRY
|
||||
Inferred type updated to byte in (unumber~) main::$6 ← (byte) 2 * (const byte) SIZEOF_STRUCT_ENTRY
|
||||
@ -182,7 +179,7 @@ Alias (struct Entry*) main::entry2#0 = (struct Entry*~) main::$1
|
||||
Alias (struct Entry*) main::entry#2 = (struct Entry*) main::entry#3
|
||||
Alias (byte) main::idx#5 = (byte) main::idx#6
|
||||
Successful SSA optimization Pass2AliasElimination
|
||||
Simple Condition (bool~) main::$17 [25] if((byte) 0!=(struct Entry*) main::entry#2) goto main::@2
|
||||
Simple Condition (bool~) main::$17 [25] if((struct Entry*)(word) 0!=(struct Entry*) main::entry#2) goto main::@2
|
||||
Successful SSA optimization Pass2ConditionalJumpSimplification
|
||||
Constant right-side identified [2] (byte~) main::$5 ← (byte) 1 * (const byte) SIZEOF_STRUCT_ENTRY
|
||||
Constant right-side identified [5] (byte~) main::$6 ← (byte) 2 * (const byte) SIZEOF_STRUCT_ENTRY
|
||||
@ -291,7 +288,7 @@ main: scope:[main] from @1
|
||||
main::@1: scope:[main] from main main::@2
|
||||
[10] (byte) main::idx#5 ← phi( main/(byte) 0 main::@2/(byte) main::idx#4 )
|
||||
[10] (struct Entry*) main::entry#2 ← phi( main/(const struct Entry*) ENTRIES#0 main::@2/(struct Entry*) main::entry#1 )
|
||||
[11] if((byte) 0!=(struct Entry*) main::entry#2) goto main::@2
|
||||
[11] if((struct Entry*)(word) 0!=(struct Entry*) main::entry#2) goto main::@2
|
||||
to:main::@return
|
||||
main::@return: scope:[main] from main::@1
|
||||
[12] return
|
||||
@ -439,7 +436,7 @@ main: {
|
||||
jmp b1
|
||||
// main::@1
|
||||
b1:
|
||||
// [11] if((byte) 0!=(struct Entry*) main::entry#2) goto main::@2 -- vwuc1_neq_pssz1_then_la1
|
||||
// [11] if((struct Entry*)(word) 0!=(struct Entry*) main::entry#2) goto main::@2 -- pssc1_neq_pssz1_then_la1
|
||||
lda entry+1
|
||||
cmp #>0
|
||||
bne b2
|
||||
@ -523,7 +520,7 @@ Statement [6] *((struct Entry**)(const struct Entry*) main::entry2#0+(const byte
|
||||
Statement [7] *((byte*)(const struct Entry*) main::entry2#0) ← (byte) 2 [ ] ( main:2 [ ] ) always clobbers reg byte a
|
||||
Statement [8] *((struct Entry**)(const struct Entry*) main::entry1#0+(const byte) OFFSET_STRUCT_ENTRY_NEXT) ← (struct Entry*) 0 [ ] ( main:2 [ ] ) always clobbers reg byte a
|
||||
Statement [9] *((byte*)(const struct Entry*) main::entry1#0) ← (byte) 3 [ ] ( main:2 [ ] ) always clobbers reg byte a
|
||||
Statement [11] if((byte) 0!=(struct Entry*) main::entry#2) goto main::@2 [ main::entry#2 main::idx#5 ] ( main:2 [ main::entry#2 main::idx#5 ] ) always clobbers reg byte a
|
||||
Statement [11] if((struct Entry*)(word) 0!=(struct Entry*) main::entry#2) goto main::@2 [ main::entry#2 main::idx#5 ] ( main:2 [ main::entry#2 main::idx#5 ] ) always clobbers reg byte a
|
||||
Removing always clobbered register reg byte a as potential for zp ZP_BYTE:4 [ main::idx#5 main::idx#4 ]
|
||||
Statement [13] (byte~) main::$2 ← (byte) '0' + *((byte*)(struct Entry*) main::entry#2) [ main::entry#2 main::idx#5 main::$2 ] ( main:2 [ main::entry#2 main::idx#5 main::$2 ] ) always clobbers reg byte a reg byte y
|
||||
Removing always clobbered register reg byte y as potential for zp ZP_BYTE:4 [ main::idx#5 main::idx#4 ]
|
||||
@ -542,7 +539,7 @@ Statement [6] *((struct Entry**)(const struct Entry*) main::entry2#0+(const byte
|
||||
Statement [7] *((byte*)(const struct Entry*) main::entry2#0) ← (byte) 2 [ ] ( main:2 [ ] ) always clobbers reg byte a
|
||||
Statement [8] *((struct Entry**)(const struct Entry*) main::entry1#0+(const byte) OFFSET_STRUCT_ENTRY_NEXT) ← (struct Entry*) 0 [ ] ( main:2 [ ] ) always clobbers reg byte a
|
||||
Statement [9] *((byte*)(const struct Entry*) main::entry1#0) ← (byte) 3 [ ] ( main:2 [ ] ) always clobbers reg byte a
|
||||
Statement [11] if((byte) 0!=(struct Entry*) main::entry#2) goto main::@2 [ main::entry#2 main::idx#5 ] ( main:2 [ main::entry#2 main::idx#5 ] ) always clobbers reg byte a
|
||||
Statement [11] if((struct Entry*)(word) 0!=(struct Entry*) main::entry#2) goto main::@2 [ main::entry#2 main::idx#5 ] ( main:2 [ main::entry#2 main::idx#5 ] ) always clobbers reg byte a
|
||||
Statement [13] (byte~) main::$2 ← (byte) '0' + *((byte*)(struct Entry*) main::entry#2) [ main::entry#2 main::idx#5 main::$2 ] ( main:2 [ main::entry#2 main::idx#5 main::$2 ] ) always clobbers reg byte a reg byte y
|
||||
Statement [16] (byte~) main::$3 ← < *((struct Entry**)(struct Entry*) main::entry#2 + (const byte) OFFSET_STRUCT_ENTRY_NEXT) [ main::entry#2 main::idx#1 main::$3 ] ( main:2 [ main::entry#2 main::idx#1 main::$3 ] ) always clobbers reg byte a reg byte y
|
||||
Statement [19] (byte~) main::$4 ← > *((struct Entry**)(struct Entry*) main::entry#2 + (const byte) OFFSET_STRUCT_ENTRY_NEXT) [ main::entry#2 main::idx#2 main::$4 ] ( main:2 [ main::entry#2 main::idx#2 main::$4 ] ) always clobbers reg byte a reg byte y
|
||||
@ -641,7 +638,7 @@ main: {
|
||||
jmp b1
|
||||
// main::@1
|
||||
b1:
|
||||
// [11] if((byte) 0!=(struct Entry*) main::entry#2) goto main::@2 -- vwuc1_neq_pssz1_then_la1
|
||||
// [11] if((struct Entry*)(word) 0!=(struct Entry*) main::entry#2) goto main::@2 -- pssc1_neq_pssz1_then_la1
|
||||
lda entry+1
|
||||
cmp #>0
|
||||
bne b2
|
||||
@ -833,7 +830,7 @@ main: {
|
||||
// main::@1
|
||||
b1:
|
||||
// while(entry)
|
||||
// [11] if((byte) 0!=(struct Entry*) main::entry#2) goto main::@2 -- vwuc1_neq_pssz1_then_la1
|
||||
// [11] if((struct Entry*)(word) 0!=(struct Entry*) main::entry#2) goto main::@2 -- pssc1_neq_pssz1_then_la1
|
||||
lda entry+1
|
||||
cmp #>0
|
||||
bne b2
|
||||
|
||||
Loading…
Reference in New Issue
Block a user