/// <summary>
/// Allocates the virtual register or stack slot.
/// </summary>
/// <param name="type">The type.</param>
/// <returns></returns>
public Operand AllocateVirtualRegisterOrStackSlot(MosaType type)
{
return(MethodCompiler.AllocateVirtualRegisterOrStackSlot(type));
}
private static void PatchInvoke(MethodCompiler methodCompiler)
{
// check if instance is null (if so, it's a static call to the methodPointer)
var loadInstruction = methodCompiler.Architecture.Is32BitPlatform ? (BaseInstruction)IRInstruction.Load32 : IRInstruction.Load64;
var compareInstruction = methodCompiler.Architecture.Is32BitPlatform ? (BaseInstruction)IRInstruction.Compare32x32 : IRInstruction.Compare64x64;
var branchInstruction = methodCompiler.Architecture.Is32BitPlatform ? (BaseInstruction)IRInstruction.CompareBranch32 : IRInstruction.CompareBranch64;
var nativeIntegerType = methodCompiler.Architecture.Is32BitPlatform ? methodCompiler.TypeSystem.BuiltIn.U4 : methodCompiler.TypeSystem.BuiltIn.U8;
var methodPointerField = GetField(methodCompiler.Method.DeclaringType, "methodPointer");
int methodPointerOffset = methodCompiler.TypeLayout.GetFieldOffset(methodPointerField);
var methodPointerOffsetOperand = methodCompiler.CreateConstant(methodPointerOffset);
var instanceField = GetField(methodCompiler.Method.DeclaringType, "instance");
int instanceOffset = methodCompiler.TypeLayout.GetFieldOffset(instanceField);
var instanceOffsetOperand = methodCompiler.CreateConstant(instanceOffset);
var size = methodCompiler.Architecture.NativeInstructionSize;
bool withReturn = (methodCompiler.Method.Signature.ReturnType == null) ? false : !methodCompiler.Method.Signature.ReturnType.IsVoid;
var b0 = new Context(CreateMethodStructure(methodCompiler));
var b1 = new Context(methodCompiler.BasicBlocks.CreateBlock());
var b2 = new Context(methodCompiler.BasicBlocks.CreateBlock());
var b3 = new Context(methodCompiler.BasicBlocks.CreateBlock());
var vrs = new Operand[methodCompiler.Parameters.Length];
for (int i = 0; i < methodCompiler.Parameters.Length; i++)
{
var type = methodCompiler.Parameters[i].Type;
if (!MosaTypeLayout.CanFitInRegister(type))
{
b0.AppendInstruction(IRInstruction.LoadParamCompound, vrs[i], methodCompiler.Parameters[i]);
b0.MosaType = type;
}
else
{
vrs[i] = methodCompiler.VirtualRegisters.Allocate(methodCompiler.Parameters[i].Type);
var paramLoadInstruction = BaseMethodCompilerStage.GetLoadParameterInstruction(vrs[i].Type, methodCompiler.Architecture.Is32BitPlatform);
b0.AppendInstruction(paramLoadInstruction, vrs[i], methodCompiler.Parameters[i]);
b0.MosaType = type;
}
}
var thisOperand = vrs[0];
var opMethod = methodCompiler.VirtualRegisters.Allocate(nativeIntegerType);
var opInstance = methodCompiler.VirtualRegisters.Allocate(thisOperand.Type);
var opCompare = methodCompiler.VirtualRegisters.Allocate(nativeIntegerType);
var opReturn = withReturn ? methodCompiler.AllocateVirtualRegisterOrStackSlot(methodCompiler.Method.Signature.ReturnType) : null;
var c0 = methodCompiler.ConstantZero;
b0.AppendInstruction(loadInstruction, opMethod, thisOperand, methodPointerOffsetOperand);
b0.AppendInstruction(loadInstruction, opInstance, thisOperand, instanceOffsetOperand);
b0.AppendInstruction(compareInstruction, ConditionCode.Equal, opCompare, opInstance, c0);
b0.AppendInstruction(branchInstruction, ConditionCode.Equal, null, opCompare, c0);
b0.AddBranchTarget(b2.Block);
b0.AppendInstruction(IRInstruction.Jmp, b1.Block);
var operands = new List <Operand>(methodCompiler.Parameters.Length + 1);
for (int i = 1; i < methodCompiler.Parameters.Length; i++)
{
operands.Add(vrs[i]);
}
var result = withReturn ? opReturn : null;
// no instance
b1.AppendInstruction(IRInstruction.CallDynamic, result, opMethod, operands);
b1.AppendInstruction(IRInstruction.Jmp, b3.Block);
// instance
b2.AppendInstruction(IRInstruction.CallDynamic, result, opMethod, opInstance, operands);
b2.AppendInstruction(IRInstruction.Jmp, b3.Block);
// return
if (opReturn != null)
{
var setReturn = BaseMethodCompilerStage.GetSetReturnInstruction(opReturn.Type, methodCompiler.Architecture.Is32BitPlatform);
b3.AppendInstruction(setReturn, null, opReturn);
}
b3.AppendInstruction(IRInstruction.Jmp, methodCompiler.BasicBlocks.EpilogueBlock);
}