static bool IsThisOrDup(Instruction instr) {
return instr.GetParameterIndex() == 0 || instr.OpCode.Code == Code.Dup;
}
protected InstructionPatcher tryInlineOtherMethod(int patchIndex, MethodDef methodToInline, Instruction instr, int instrIndex, int popLastArgs)
{
int loadIndex = 0;
int methodArgsCount = DotNetUtils.getArgsCount(methodToInline);
bool foundLdarga = false;
while (instr != null && loadIndex < methodArgsCount) {
bool isLdarg = true;
switch (instr.OpCode.Code) {
case Code.Ldarg:
case Code.Ldarg_S:
case Code.Ldarg_0:
case Code.Ldarg_1:
case Code.Ldarg_2:
case Code.Ldarg_3:
break;
case Code.Ldarga:
case Code.Ldarga_S:
foundLdarga = true;
break;
default:
isLdarg = false;
break;
}
if (!isLdarg)
break;
if (instr.GetParameterIndex() != loadIndex)
return null;
loadIndex++;
instr = DotNetUtils.getInstruction(methodToInline.Body.Instructions, ref instrIndex);
instr = onAfterLoadArg(methodToInline, instr, ref instrIndex);
}
if (instr == null || loadIndex != methodArgsCount - popLastArgs)
return null;
if (instr.OpCode.Code == Code.Call || instr.OpCode.Code == Code.Callvirt) {
if (foundLdarga)
return null;
var callInstr = instr;
var calledMethod = callInstr.Operand as IMethod;
if (calledMethod == null)
return null;
if (!isCompatibleType(-1, calledMethod.MethodSig.RetType, methodToInline.MethodSig.RetType))
return null;
if (!checkSameMethods(calledMethod, methodToInline, popLastArgs))
return null;
if (!hasAccessTo(instr.Operand))
return null;
return new InstructionPatcher(patchIndex, instrIndex, callInstr);
}
else if (instr.OpCode.Code == Code.Newobj) {
if (foundLdarga)
return null;
var newobjInstr = instr;
var ctor = newobjInstr.Operand as IMethod;
if (ctor == null)
return null;
if (!isCompatibleType(-1, ctor.DeclaringType, methodToInline.MethodSig.RetType))
return null;
var methodArgs = methodToInline.Parameters;
var calledMethodArgs = DotNetUtils.getArgs(ctor);
if (methodArgs.Count + 1 - popLastArgs != calledMethodArgs.Count)
return null;
for (int i = 1; i < calledMethodArgs.Count; i++) {
if (!isCompatibleType(i, calledMethodArgs[i], methodArgs[i - 1].Type))
return null;
}
if (!hasAccessTo(instr.Operand))
return null;
return new InstructionPatcher(patchIndex, instrIndex, newobjInstr);
}
else if (instr.OpCode.Code == Code.Ldfld || instr.OpCode.Code == Code.Ldflda ||
instr.OpCode.Code == Code.Ldftn || instr.OpCode.Code == Code.Ldvirtftn) {
var ldInstr = instr;
if (methodArgsCount != 1)
return null;
if (!hasAccessTo(instr.Operand))
return null;
return new InstructionPatcher(patchIndex, instrIndex, ldInstr);
}
return null;
}
