Examples with RegisterMap org.graalvm.compiler.lir.util.RegisterMap used on opensource projects

Example 1 with RegisterMap

use of org.graalvm.compiler.lir.util.RegisterMap in project graal by oracle.

the class SaveCalleeSaveRegisters method saveAtEntry.

private static RegisterMap<Variable> saveAtEntry(LIR lir, LIRGeneratorTool lirGen, LIRGenerationResult lirGenRes, RegisterArray calleeSaveRegisters, Architecture arch) {
    AbstractBlockBase<?> startBlock = lir.getControlFlowGraph().getStartBlock();
    ArrayList<LIRInstruction> instructions = lir.getLIRforBlock(startBlock);
    int insertionIndex = 1;
    LIRInsertionBuffer buffer = new LIRInsertionBuffer();
    buffer.init(instructions);
    StandardOp.LabelOp entry = (StandardOp.LabelOp) instructions.get(insertionIndex - 1);
    RegisterValue[] savedRegisterValues = new RegisterValue[calleeSaveRegisters.size()];
    int savedRegisterValueIndex = 0;
    RegisterMap<Variable> saveMap = new RegisterMap<>(arch);
    for (Register register : calleeSaveRegisters) {
        PlatformKind registerPlatformKind = arch.getLargestStorableKind(register.getRegisterCategory());
        LIRKind lirKind = LIRKind.value(registerPlatformKind);
        RegisterValue registerValue = register.asValue(lirKind);
        Variable saveVariable = lirGen.newVariable(lirKind);
        LIRInstruction save = lirGen.getSpillMoveFactory().createMove(saveVariable, registerValue);
        buffer.append(insertionIndex, save);
        save.setComment(lirGenRes, "SaveCalleeSavedRegisters: saveAtEntry");
        saveMap.put(register, saveVariable);
        savedRegisterValues[savedRegisterValueIndex++] = registerValue;
    }
    entry.addIncomingValues(savedRegisterValues);
    buffer.finish();
    return saveMap;
}