public override MethodIL EmitIL() { ILEmitter emitter = new ILEmitter(); ILCodeStream codeStream = emitter.NewCodeStream(); // InstantiateAsOpen covers the weird case of generic enums TypeDesc owningTypeAsOpen = _owningType.InstantiateAsOpen(); ILCodeLabel lNotEqual = emitter.NewCodeLabel(); // if (!(obj is {enumtype})) // return false; codeStream.EmitLdArg(1); codeStream.Emit(ILOpcode.isinst, emitter.NewToken(owningTypeAsOpen)); codeStream.Emit(ILOpcode.dup); codeStream.Emit(ILOpcode.brfalse, lNotEqual); // return ({underlyingtype})this == ({underlyingtype})obj; // PREFER: ILOpcode.unbox, but the codegen for that is pretty bad codeStream.Emit(ILOpcode.ldflda, emitter.NewToken(Context.GetWellKnownType(WellKnownType.Object).GetKnownField("m_pEEType"))); codeStream.EmitLdc(Context.Target.PointerSize); codeStream.Emit(ILOpcode.add); codeStream.EmitLdInd(owningTypeAsOpen); codeStream.EmitLdArg(0); codeStream.EmitLdInd(owningTypeAsOpen); codeStream.Emit(ILOpcode.ceq); codeStream.Emit(ILOpcode.ret); codeStream.EmitLabel(lNotEqual); codeStream.Emit(ILOpcode.pop); codeStream.EmitLdc(0); codeStream.Emit(ILOpcode.ret); return(emitter.Link(this)); }
public override MethodIL EmitIL() { ILEmitter emitter = new ILEmitter(); ILCodeStream argSetupStream = emitter.NewCodeStream(); ILCodeStream thisCallSiteSetupStream = emitter.NewCodeStream(); ILCodeStream staticCallSiteSetupStream = emitter.NewCodeStream(); ILCodeStream returnCodeStream = emitter.NewCodeStream(); // This function will look like // // !For each parameter to the method // !if (parameter is In Parameter) // localX is TypeOfParameterX& // ldarg.2 // ldtoken TypeOfParameterX // call DynamicInvokeParamHelperIn(ref ArgSetupState, RuntimeTypeHandle) // stloc localX // !else // localX is TypeOfParameter // ldarg.2 // ldtoken TypeOfParameterX // call DynamicInvokeParamHelperRef(ref ArgSetupState, RuntimeTypeHandle) // stloc localX // ldarg.2 // call DynamicInvokeArgSetupComplete(ref ArgSetupState) // *** Thiscall instruction stream starts here *** // ldarg.3 // Load targetIsThisCall // brfalse Not_this_call // ldarg.0 // Load this pointer // !For each parameter // !if (parameter is In Parameter) // ldloc localX // ldobj TypeOfParameterX // !else // ldloc localX // ldarg.1 // calli ReturnType thiscall(TypeOfParameter1, ...) // br Process_return // *** Static call instruction stream starts here *** // Not_this_call: // !For each parameter // !if (parameter is In Parameter) // ldloc localX // ldobj TypeOfParameterX // !else // ldloc localX // ldarg.1 // calli ReturnType (TypeOfParameter1, ...) // *** Return code stream starts here *** // Process_return: // !if (ReturnType is Byref) // dup // brfalse ByRefNull // ldobj ReturnType // !if ((ReturnType == void) // ldnull // !elif (ReturnType is pointer) // System.Reflection.Pointer.Box(ReturnType) // !else // box ReturnType // ret // // !if (ReturnType is ByRef) // ByRefNull: // pop // call InvokeUtils.get_NullByRefValueSentinel // ret ILCodeLabel lStaticCall = emitter.NewCodeLabel(); ILCodeLabel lProcessReturn = emitter.NewCodeLabel(); thisCallSiteSetupStream.EmitLdArg(3); // targetIsThisCall thisCallSiteSetupStream.Emit(ILOpcode.brfalse, lStaticCall); staticCallSiteSetupStream.EmitLabel(lStaticCall); thisCallSiteSetupStream.EmitLdArg(0); // thisPtr ILToken tokDynamicInvokeParamHelperRef = emitter.NewToken(InvokeUtilsType.GetKnownMethod("DynamicInvokeParamHelperRef", null)); ILToken tokDynamicInvokeParamHelperIn = emitter.NewToken(InvokeUtilsType.GetKnownMethod("DynamicInvokeParamHelperIn", null)); TypeDesc[] targetMethodSignature = new TypeDesc[_targetSignature.Length]; for (int paramIndex = 0; paramIndex < _targetSignature.Length; paramIndex++) { TypeDesc paramType = Context.GetSignatureVariable(paramIndex, true); DynamicInvokeMethodParameterKind paramKind = _targetSignature[paramIndex]; for (int i = 0; i < _targetSignature.GetNumberOfParameterPointerIndirections(paramIndex); i++) { paramType = paramType.MakePointerType(); } ILToken tokParamType = emitter.NewToken(paramType); ILLocalVariable local = emitter.NewLocal(paramType.MakeByRefType()); thisCallSiteSetupStream.EmitLdLoc(local); staticCallSiteSetupStream.EmitLdLoc(local); argSetupStream.EmitLdArg(2); // argSetupState argSetupStream.Emit(ILOpcode.ldtoken, tokParamType); if (paramKind == DynamicInvokeMethodParameterKind.Reference) { argSetupStream.Emit(ILOpcode.call, tokDynamicInvokeParamHelperRef); targetMethodSignature[paramIndex] = paramType.MakeByRefType(); } else { argSetupStream.Emit(ILOpcode.call, tokDynamicInvokeParamHelperIn); thisCallSiteSetupStream.EmitLdInd(paramType); staticCallSiteSetupStream.EmitLdInd(paramType); targetMethodSignature[paramIndex] = paramType; } argSetupStream.EmitStLoc(local); } argSetupStream.EmitLdArg(2); // argSetupState argSetupStream.Emit(ILOpcode.call, emitter.NewToken(InvokeUtilsType.GetKnownMethod("DynamicInvokeArgSetupComplete", null))); thisCallSiteSetupStream.EmitLdArg(1); // methodToCall staticCallSiteSetupStream.EmitLdArg(1); // methodToCall DynamicInvokeMethodParameterKind returnKind = _targetSignature.ReturnType; TypeDesc returnType = returnKind != DynamicInvokeMethodParameterKind.None ? Context.GetSignatureVariable(_targetSignature.Length, true) : Context.GetWellKnownType(WellKnownType.Void); for (int i = 0; i < _targetSignature.GetNumerOfReturnTypePointerIndirections(); i++) { returnType = returnType.MakePointerType(); } if (returnKind == DynamicInvokeMethodParameterKind.Reference) { returnType = returnType.MakeByRefType(); } MethodSignature thisCallMethodSig = new MethodSignature(0, 0, returnType, targetMethodSignature); thisCallSiteSetupStream.Emit(ILOpcode.calli, emitter.NewToken(thisCallMethodSig)); thisCallSiteSetupStream.Emit(ILOpcode.br, lProcessReturn); MethodSignature staticCallMethodSig = new MethodSignature(MethodSignatureFlags.Static, 0, returnType, targetMethodSignature); staticCallSiteSetupStream.Emit(ILOpcode.calli, emitter.NewToken(staticCallMethodSig)); returnCodeStream.EmitLabel(lProcessReturn); ILCodeLabel lByRefReturnNull = null; if (returnKind == DynamicInvokeMethodParameterKind.None) { returnCodeStream.Emit(ILOpcode.ldnull); } else { TypeDesc returnTypeForBoxing = returnType; if (returnType.IsByRef) { // If this is a byref return, we need to dereference first returnTypeForBoxing = ((ByRefType)returnType).ParameterType; lByRefReturnNull = emitter.NewCodeLabel(); returnCodeStream.Emit(ILOpcode.dup); returnCodeStream.Emit(ILOpcode.brfalse, lByRefReturnNull); returnCodeStream.EmitLdInd(returnTypeForBoxing); } if (returnTypeForBoxing.IsPointer) { // Pointers box differently returnCodeStream.Emit(ILOpcode.ldtoken, emitter.NewToken(returnTypeForBoxing)); MethodDesc getTypeFromHandleMethod = Context.SystemModule.GetKnownType("System", "Type").GetKnownMethod("GetTypeFromHandle", null); returnCodeStream.Emit(ILOpcode.call, emitter.NewToken(getTypeFromHandleMethod)); MethodDesc pointerBoxMethod = Context.SystemModule.GetKnownType("System.Reflection", "Pointer").GetKnownMethod("Box", null); returnCodeStream.Emit(ILOpcode.call, emitter.NewToken(pointerBoxMethod)); } else { ILToken tokReturnType = emitter.NewToken(returnTypeForBoxing); returnCodeStream.Emit(ILOpcode.box, tokReturnType); } } returnCodeStream.Emit(ILOpcode.ret); if (lByRefReturnNull != null) { returnCodeStream.EmitLabel(lByRefReturnNull); returnCodeStream.Emit(ILOpcode.pop); returnCodeStream.Emit(ILOpcode.call, emitter.NewToken(InvokeUtilsType.GetKnownMethod("get_NullByRefValueSentinel", null))); returnCodeStream.Emit(ILOpcode.ret); } return(emitter.Link(this)); }