avoid making constant folding logic eliminate obviously dead bitcasts, speeding up PR3810
by ~2%.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67434 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index b03513a..a0024aa 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -824,7 +824,9 @@
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::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 =