Don't copy or initialize empty classes. Fixes PR7012.

llvm-svn: 102891
2010-05-03 01:20:20 +00:00
parent 8bdbb5be19
commit 16e94af67c
3 changed files with 17 additions and 1 deletions
--- a/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -473,6 +473,14 @@ void CodeGenFunction::ErrorUnsupported(const Stmt *S, const char *Type,
 }

 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");