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-rw-r--r--lib/CodeGen/CGCXX.cpp16
1 files changed, 16 insertions, 0 deletions
diff --git a/lib/CodeGen/CGCXX.cpp b/lib/CodeGen/CGCXX.cpp
index 4889fc08f4..cd5d64697d 100644
--- a/lib/CodeGen/CGCXX.cpp
+++ b/lib/CodeGen/CGCXX.cpp
@@ -109,6 +109,16 @@ bool CodeGenModule::TryEmitBaseDestructorAsAlias(const CXXDestructorDecl *D) {
GlobalDecl(BaseD, Dtor_Base));
}
+static bool isWeakForLinker(llvm::GlobalValue::LinkageTypes Linkage) {
+ return (Linkage == llvm::GlobalValue::AvailableExternallyLinkage ||
+ Linkage == llvm::GlobalValue::WeakAnyLinkage ||
+ Linkage == llvm::GlobalValue::WeakODRLinkage ||
+ Linkage == llvm::GlobalValue::LinkOnceAnyLinkage ||
+ Linkage == llvm::GlobalValue::LinkOnceODRLinkage ||
+ Linkage == llvm::GlobalValue::CommonLinkage ||
+ Linkage == llvm::GlobalValue::ExternalWeakLinkage);
+}
+
/// Try to emit a definition as a global alias for another definition.
bool CodeGenModule::TryEmitDefinitionAsAlias(GlobalDecl AliasDecl,
GlobalDecl TargetDecl) {
@@ -142,6 +152,12 @@ bool CodeGenModule::TryEmitDefinitionAsAlias(GlobalDecl AliasDecl,
return true;
}
+ llvm::GlobalValue::LinkageTypes TargetLinkage
+ = getFunctionLinkage(cast<FunctionDecl>(TargetDecl.getDecl()));
+
+ if (isWeakForLinker(TargetLinkage))
+ return true;
+
// Derive the type for the alias.
const llvm::PointerType *AliasType
= getTypes().GetFunctionType(AliasDecl)->getPointerTo();