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Clean up SynthesizeCXXCopyAssignment a little. 

llvm-svn: 102285
This commit is contained in:
Anders Carlsson 2010-04-24 23:09:21 +00:00
parent c4ba0cd2ea
commit 84e3b62ac0
1 changed files with 11 additions and 15 deletions
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26
clang/lib/CodeGen/CGClass.cpp
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@ -742,18 +742,14 @@ CodeGenFunction::SynthesizeCXXCopyConstructor(const FunctionArgList &Args) {
/// if the subobject is of scalar type, the built-in assignment operator is
/// used.
void CodeGenFunction::SynthesizeCXXCopyAssignment(const FunctionArgList &Args) {
const CXXMethodDecl *CD = cast<CXXMethodDecl>(CurGD.getDecl());
const CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(CD->getDeclContext());
const CXXMethodDecl *MD = cast<CXXMethodDecl>(CurGD.getDecl());
const CXXRecordDecl *ClassDecl = MD->getParent();
assert(!ClassDecl->hasUserDeclaredCopyAssignment() &&
"SynthesizeCXXCopyAssignment - copy assignment has user declaration");
FunctionArgList::const_iterator i = Args.begin();
const VarDecl *ThisArg = i->first;
llvm::Value *ThisObj = GetAddrOfLocalVar(ThisArg);
llvm::Value *LoadOfThis = Builder.CreateLoad(ThisObj, "this");
const VarDecl *SrcArg = (i+1)->first;
llvm::Value *SrcObj = GetAddrOfLocalVar(SrcArg);
llvm::Value *LoadOfSrc = Builder.CreateLoad(SrcObj);
llvm::Value *ThisPtr = LoadCXXThis();
llvm::Value *SrcPtr =
Builder.CreateLoad(GetAddrOfLocalVar(Args[1].first));
for (CXXRecordDecl::base_class_const_iterator Base = ClassDecl->bases_begin();
Base != ClassDecl->bases_end(); ++Base) {
@ -763,7 +759,7 @@ void CodeGenFunction::SynthesizeCXXCopyAssignment(const FunctionArgList &Args) {
CXXRecordDecl *BaseClassDecl
= cast<CXXRecordDecl>(Base->getType()->getAs<RecordType>()->getDecl());
EmitClassCopyAssignment(LoadOfThis, LoadOfSrc, ClassDecl, BaseClassDecl,
EmitClassCopyAssignment(ThisPtr, SrcPtr, ClassDecl, BaseClassDecl,
Base->getType());
}
@ -779,8 +775,8 @@ void CodeGenFunction::SynthesizeCXXCopyAssignment(const FunctionArgList &Args) {
if (const RecordType *FieldClassType = FieldType->getAs<RecordType>()) {
CXXRecordDecl *FieldClassDecl
= cast<CXXRecordDecl>(FieldClassType->getDecl());
LValue LHS = EmitLValueForField(LoadOfThis, *Field, 0);
LValue RHS = EmitLValueForField(LoadOfSrc, *Field, 0);
LValue LHS = EmitLValueForField(ThisPtr, *Field, 0);
LValue RHS = EmitLValueForField(SrcPtr, *Field, 0);
if (Array) {
const llvm::Type *BasePtr = ConvertType(FieldType);
BasePtr = llvm::PointerType::getUnqual(BasePtr);
@ -797,8 +793,8 @@ void CodeGenFunction::SynthesizeCXXCopyAssignment(const FunctionArgList &Args) {
continue;
}
// Do a built-in assignment of scalar data members.
LValue LHS = EmitLValueForField(LoadOfThis, *Field, 0);
LValue RHS = EmitLValueForField(LoadOfSrc, *Field, 0);
LValue LHS = EmitLValueForField(ThisPtr, *Field, 0);
LValue RHS = EmitLValueForField(SrcPtr, *Field, 0);
if (!hasAggregateLLVMType(Field->getType())) {
RValue RVRHS = EmitLoadOfLValue(RHS, Field->getType());
EmitStoreThroughLValue(RVRHS, LHS, Field->getType());
@ -812,7 +808,7 @@ void CodeGenFunction::SynthesizeCXXCopyAssignment(const FunctionArgList &Args) {
}
// return *this;
Builder.CreateStore(LoadOfThis, ReturnValue);
Builder.CreateStore(ThisPtr, ReturnValue);
}
static void EmitBaseInitializer(CodeGenFunction &CGF,