+Value *ScalarExprEmitter::VisitObjCMessageExpr(ObjCMessageExpr *E) {
+ // Only the lookup mechanism and first two arguments of the method
+ // implementation vary between runtimes. We can get the receiver and
+ // arguments in generic code.
+
+ // Find the receiver
+ llvm::Value * Receiver = CGF.EmitScalarExpr(E->getReceiver());
+
+ // Process the arguments
+ unsigned int ArgC = E->getNumArgs();
+ llvm::SmallVector<llvm::Value*, 16> Args;
+ for(unsigned i=0 ; i<ArgC ; i++) {
+ Expr *ArgExpr = E->getArg(i);
+ QualType ArgTy = ArgExpr->getType();
+ if (!CGF.hasAggregateLLVMType(ArgTy)) {
+ // Scalar argument is passed by-value.
+ Args.push_back(CGF.EmitScalarExpr(ArgExpr));
+ } else if (ArgTy->isComplexType()) {
+ // Make a temporary alloca to pass the argument.
+ llvm::Value *DestMem = CGF.CreateTempAlloca(ConvertType(ArgTy));
+ CGF.EmitComplexExprIntoAddr(ArgExpr, DestMem, false);
+ Args.push_back(DestMem);
+ } else {
+ llvm::Value *DestMem = CGF.CreateTempAlloca(ConvertType(ArgTy));
+ CGF.EmitAggExpr(ArgExpr, DestMem, false);
+ Args.push_back(DestMem);
+ }
+ }
+
+ // Get the selector string
+ std::string SelStr = E->getSelector().getName();
+ llvm::Constant *Selector = CGF.CGM.GetAddrOfConstantString(SelStr);
+ ConvertType(E->getType());
+ return Runtime->generateMessageSend(Builder,
+ ConvertType(E->getType()),
+ Receiver,
+ Selector,
+ &Args[0],
+ Args.size());
+}
+