Use a slightly more semantic interface for emitting call arguments.

llvm-svn: 127494

clang/lib/CodeGen/CGCall.cpp

@@ -1116,42 +1116,48 @@ void CodeGenFunction::EmitFunctionEpilog(const CGFunctionInfo &FI) {
     Ret->setDebugLoc(RetDbgLoc);
 }
 
-RValue CodeGenFunction::EmitDelegateCallArg(const VarDecl *Param) {
+void CodeGenFunction::EmitDelegateCallArg(CallArgList &args,
+                                          const VarDecl *param) {
   // StartFunction converted the ABI-lowered parameter(s) into a
   // local alloca.  We need to turn that into an r-value suitable
   // for EmitCall.
-  llvm::Value *Local = GetAddrOfLocalVar(Param);
+  llvm::Value *local = GetAddrOfLocalVar(param);
 
-  QualType ArgType = Param->getType();
+  QualType type = param->getType();
 
   // For the most part, we just need to load the alloca, except:
   // 1) aggregate r-values are actually pointers to temporaries, and
   // 2) references to aggregates are pointers directly to the aggregate.
   // I don't know why references to non-aggregates are different here.
-  if (const ReferenceType *RefType = ArgType->getAs<ReferenceType>()) {
-    if (hasAggregateLLVMType(RefType->getPointeeType()))
-      return RValue::getAggregate(Local);
+  if (const ReferenceType *ref = type->getAs<ReferenceType>()) {
+    if (hasAggregateLLVMType(ref->getPointeeType()))
+      return args.add(RValue::getAggregate(local), type);
 
     // Locals which are references to scalars are represented
     // with allocas holding the pointer.
-    return RValue::get(Builder.CreateLoad(Local));
+    return args.add(RValue::get(Builder.CreateLoad(local)), type);
   }
 
-  if (ArgType->isAnyComplexType())
-    return RValue::getComplex(LoadComplexFromAddr(Local, /*volatile*/ false));
-
-  if (hasAggregateLLVMType(ArgType))
-    return RValue::getAggregate(Local);
-
-  unsigned Alignment = getContext().getDeclAlign(Param).getQuantity();
-  return RValue::get(EmitLoadOfScalar(Local, false, Alignment, ArgType));
+  if (type->isAnyComplexType()) {
+    ComplexPairTy complex = LoadComplexFromAddr(local, /*volatile*/ false);
+    return args.add(RValue::getComplex(complex), type);
   }
 
-RValue CodeGenFunction::EmitCallArg(const Expr *E, QualType ArgType) {
-  if (ArgType->isReferenceType())
-    return EmitReferenceBindingToExpr(E, /*InitializedDecl=*/0);
+  if (hasAggregateLLVMType(type))
+    return args.add(RValue::getAggregate(local), type);
 
-  return EmitAnyExprToTemp(E);
+  unsigned alignment = getContext().getDeclAlign(param).getQuantity();
+  llvm::Value *value = EmitLoadOfScalar(local, false, alignment, type);
+  return args.add(RValue::get(value), type);
+}
+
+void CodeGenFunction::EmitCallArg(CallArgList &args, const Expr *E,
+                                  QualType type) {
+  if (type->isReferenceType())
+    return args.add(EmitReferenceBindingToExpr(E, /*InitializedDecl=*/0),
+                    type);
+
+  args.add(EmitAnyExprToTemp(E), type);
 }
 
 /// Emits a call or invoke instruction to the given function, depending

clang/lib/CodeGen/CGCall.h

@@ -48,6 +48,10 @@ namespace CodeGen {
   /// arguments in a call.
   class CallArgList :
     public llvm::SmallVector<std::pair<RValue, QualType>, 16> {
+  public:
+    void add(RValue rvalue, QualType type) {
+      push_back(std::pair<RValue,QualType>(rvalue,type));
+    }
   };
 
   /// FunctionArgList - Type for representing both the decl and type

clang/lib/CodeGen/CGClass.cpp

@@ -1211,9 +1211,7 @@ CodeGenFunction::EmitSynthesizedCXXCopyCtorCall(const CXXConstructorDecl *D,
   for (FunctionProtoType::arg_type_iterator I = FPT->arg_type_begin()+1,
        E = FPT->arg_type_end(); I != E; ++I, ++Arg) {
     assert(Arg != ArgEnd && "Running over edge of argument list!");
-    QualType ArgType = *I;
-    Args.push_back(std::make_pair(EmitCallArg(*Arg, ArgType),
-                                  ArgType));
+    EmitCallArg(Args, *Arg, *I);
   }
   // Either we've emitted all the call args, or we have a call to a
   // variadic function.
@@ -1222,8 +1220,7 @@ CodeGenFunction::EmitSynthesizedCXXCopyCtorCall(const CXXConstructorDecl *D,
   // If we still have any arguments, emit them using the type of the argument.
   for (; Arg != ArgEnd; ++Arg) {
     QualType ArgType = Arg->getType();
-    Args.push_back(std::make_pair(EmitCallArg(*Arg, ArgType),
-                                  ArgType));
+    EmitCallArg(Args, *Arg, ArgType);
   }
   
   QualType ResultType = FPT->getResultType();
@@ -1261,11 +1258,8 @@ CodeGenFunction::EmitDelegateCXXConstructorCall(const CXXConstructorDecl *Ctor,
 
   // Explicit arguments.
   for (; I != E; ++I) {
-    const VarDecl *Param = *I;
-    QualType ArgType = Param->getType(); // because we're passing it to itself
-    RValue Arg = EmitDelegateCallArg(Param);
-
-    DelegateArgs.push_back(std::make_pair(Arg, ArgType));
+    const VarDecl *param = *I;
+    EmitDelegateCallArg(DelegateArgs, param);
   }
 
   EmitCall(CGM.getTypes().getFunctionInfo(Ctor, CtorType),

clang/lib/CodeGen/CGExprCXX.cpp

@@ -956,9 +956,7 @@ llvm::Value *CodeGenFunction::EmitCXXNewExpr(const CXXNewExpr *E) {
                                                placementArg->getType()) &&
            "type mismatch in call argument!");
 
-    allocatorArgs.push_back(std::make_pair(EmitCallArg(*placementArg, argType),
-                                           argType));
-
+    EmitCallArg(allocatorArgs, *placementArg, argType);
   }
 
   // Either we've emitted all the call args, or we have a call to a
@@ -970,9 +968,7 @@ llvm::Value *CodeGenFunction::EmitCXXNewExpr(const CXXNewExpr *E) {
   // If we still have any arguments, emit them using the type of the argument.
   for (CXXNewExpr::const_arg_iterator placementArgsEnd = E->placement_arg_end();
        placementArg != placementArgsEnd; ++placementArg) {
-    QualType argType = placementArg->getType();
-    allocatorArgs.push_back(std::make_pair(EmitCallArg(*placementArg, argType),
-                                           argType));
+    EmitCallArg(allocatorArgs, *placementArg, placementArg->getType());
   }
 
   // Emit the allocation call.

clang/lib/CodeGen/CGVTables.cpp

@@ -2613,11 +2613,8 @@ void CodeGenFunction::GenerateThunk(llvm::Function *Fn,
   // Add the rest of the parameters.
   for (FunctionDecl::param_const_iterator I = MD->param_begin(),
        E = MD->param_end(); I != E; ++I) {
-    ParmVarDecl *Param = *I;
-    QualType ArgType = Param->getType();
-    RValue Arg = EmitDelegateCallArg(Param);
-    
-    CallArgs.push_back(std::make_pair(Arg, ArgType));
+    ParmVarDecl *param = *I;
+    EmitDelegateCallArg(CallArgs, param);
   }
 
   // Get our callee.

clang/lib/CodeGen/CodeGenFunction.h

@@ -2087,12 +2087,12 @@ public:
   llvm::BasicBlock *getTrapBB();
 
   /// EmitCallArg - Emit a single call argument.
-  RValue EmitCallArg(const Expr *E, QualType ArgType);
+  void EmitCallArg(CallArgList &args, const Expr *E, QualType ArgType);
 
   /// EmitDelegateCallArg - We are performing a delegate call; that
   /// is, the current function is delegating to another one.  Produce
   /// a r-value suitable for passing the given parameter.
-  RValue EmitDelegateCallArg(const VarDecl *Param);
+  void EmitDelegateCallArg(CallArgList &args, const VarDecl *param);
 
 private:
   void EmitReturnOfRValue(RValue RV, QualType Ty);
@@ -2157,8 +2157,7 @@ private:
                getContext().getCanonicalType(ActualArgType).getTypePtr() &&
                "type mismatch in call argument!");
 #endif
-        Args.push_back(std::make_pair(EmitCallArg(*Arg, ArgType),
-                                      ArgType));
+        EmitCallArg(Args, *Arg, ArgType);
       }
 
       // Either we've emitted all the call args, or we have a call to a
@@ -2169,11 +2168,8 @@ private:
     }
 
     // If we still have any arguments, emit them using the type of the argument.
-    for (; Arg != ArgEnd; ++Arg) {
-      QualType ArgType = Arg->getType();
-      Args.push_back(std::make_pair(EmitCallArg(*Arg, ArgType),
-                                    ArgType));
-    }
+    for (; Arg != ArgEnd; ++Arg)
+      EmitCallArg(Args, *Arg, Arg->getType());
   }
 
   const TargetCodeGenInfo &getTargetHooks() const {