public static bool IsGPR(this DarksVMRegisters reg)
{
if (reg >= DarksVMRegisters.R0 && reg <= DarksVMRegisters.R7)
{
return(true);
}
return(false);
}
private void VisitInstr(ILInstrList instrs, ILInstruction instr, ref int index, ILPostTransformer tr)
{
if (instr.OpCode != ILOpCode.__BEGINCALL && instr.OpCode != ILOpCode.__ENDCALL)
{
return;
}
var callInfo = (InstrCallInfo)instr.Annotation;
if (callInfo.IsECall)
{
instrs.RemoveAt(index);
index--;
return;
}
var saving = new HashSet <DarksVMRegisters>(this.saveRegs);
var retVar = (IRVariable)callInfo.ReturnValue;
// R0 = return register, need to save if retVar register is not R0
//Debug.Assert(!(retVar == null ^ (callInfo.ReturnRegister == null ^ callInfo.ReturnSlot == null)));
if (retVar != null)
{
if (callInfo.ReturnSlot == null)
{
DarksVMRegisters retReg = callInfo.ReturnRegister.Register;
saving.Remove(retReg);
if (retReg != DarksVMRegisters.R0)
{
saving.Add(DarksVMRegisters.R0);
}
}
else
{
saving.Add(DarksVMRegisters.R0);
}
}
else
{
saving.Add(DarksVMRegisters.R0);
}
if (instr.OpCode == ILOpCode.__BEGINCALL)
{
instrs.Replace(index, saving
.Select(reg => new ILInstruction(ILOpCode.PUSHR_OBJECT, ILRegister.LookupRegister(reg), instr)));
}
else
{
instrs.Replace(index, saving
.Select(reg => new ILInstruction(ILOpCode.POP, ILRegister.LookupRegister(reg), instr))
.Reverse());
}
index--;
}
private void VisitInstr(ILInstrList instrs, ILInstruction instr, ref int index, ILTransformer tr)
{
if (instr.Operand is ILRegister)
{
DarksVMRegisters reg = ((ILRegister)instr.Operand).Register;
if (reg.IsGPR())
{
this.methodInfo.UsedRegister.Add(reg);
}
}
}
public IRRegister(DarksVMRegisters reg, ASTType type)
{
this.Register = reg;
this.Type = type;
}
public IRRegister(DarksVMRegisters reg)
{
this.Register = reg;
this.Type = ASTType.Ptr;
}
public IRRegister(DarksVMRegisters reg, ASTType type)
{
Register = reg;
Type = type;
}
public IRRegister(DarksVMRegisters reg)
{
Register = reg;
Type = ASTType.Ptr;
}
public byte this[DarksVMRegisters reg] => regOrder[(int)reg];
public void Deallocate(IRVariable var, DarksVMRegisters reg)
{
Debug.Assert(regAlloc[FromRegister(reg)] == var);
regAlloc[FromRegister(reg)] = null;
}
private static int FromRegister(DarksVMRegisters reg)
{
return((int)reg);
}
public static ILRegister LookupRegister(DarksVMRegisters reg) => regMap[reg];
private ILRegister(DarksVMRegisters reg)
{
this.Register = reg;
regMap.Add(reg, this);
}
public static ILRegister LookupRegister(DarksVMRegisters reg)
{
return(regMap[reg]);
}
public static bool IsGPR(this DarksVMRegisters reg) => reg >= DarksVMRegisters.R0 && reg <= DarksVMRegisters.R7 ? true : false;
