Don't copy or initialize empty classes. Fixes PR7012.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102891 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenFunction.cpp b/lib/CodeGen/CodeGenFunction.cpp
index 34b9049..d3bf164 100644
--- a/lib/CodeGen/CodeGenFunction.cpp
+++ b/lib/CodeGen/CodeGenFunction.cpp
@@ -473,6 +473,14 @@
}
void CodeGenFunction::EmitMemSetToZero(llvm::Value *DestPtr, QualType Ty) {
+ // Ignore empty classes in C++.
+ if (getContext().getLangOptions().CPlusPlus) {
+ if (const RecordType *RT = Ty->getAs<RecordType>()) {
+ if (cast<CXXRecordDecl>(RT->getDecl())->isEmpty())
+ return;
+ }
+ }
+
const llvm::Type *BP = llvm::Type::getInt8PtrTy(VMContext);
if (DestPtr->getType() != BP)
DestPtr = Builder.CreateBitCast(DestPtr, BP, "tmp");