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avoid making constant folding logic eliminate obviously dead bitcasts, speeding up PR3810 

by ~2%.

llvm-svn: 67434
This commit is contained in:
Chris Lattner 2009-03-21 06:53:34 +00:00
parent 316e1c19df
commit 9e8120e067
1 changed files with 7 additions and 2 deletions
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9
clang/lib/CodeGen/CodeGenModule.cpp
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@ -824,7 +824,9 @@ llvm::Constant *CodeGenModule::GetAddrOfFunction(const FunctionDecl *D) {
if (!Entry)
Entry = EmitForwardFunctionDefinition(D, 0);
return llvm::ConstantExpr::getBitCast(Entry, PTy);
if (Entry->getType() != PTy)
return llvm::ConstantExpr::getBitCast(Entry, PTy);
return Entry;
}
void CodeGenModule::EmitGlobalFunctionDefinition(const FunctionDecl *D) {
@ -954,8 +956,11 @@ llvm::Value *CodeGenModule::getBuiltinLibFunction(unsigned BuiltinID) {
llvm::GlobalValue *&ExistingFn =
GlobalDeclMap[getContext().Idents.get(Name).getName()];
if (ExistingFn)
if (ExistingFn) {
if (ExistingFn->getType() == Ty)
return FunctionSlot = ExistingFn;
return FunctionSlot = llvm::ConstantExpr::getBitCast(ExistingFn, Ty);
}
// FIXME: param attributes for sext/zext etc.
return FunctionSlot = ExistingFn =