Driver: Handle /GR- in a compatible way with MSVC

There are slight differences between /GR- and -fno-rtti which made
mapping one to the other inappropriate.

-fno-rtti disables dynamic_cast, typeid, and does not emit RTTI related
information for the v-table.

/GR- does not generate complete object locators and thus will not
reference them in vftables.  However, constructs like dynamic_cast and
typeid are permitted.

This should bring our implementation of RTTI up to semantic parity with
MSVC modulo bugs.

llvm-svn: 212138

1 files changed, 1 insertions, 1 deletions

diff --git a/clang/lib/CodeGen/MicrosoftRTTI.cpp b/clang/lib/CodeGen/MicrosoftRTTI.cpp
index 51d56e94abe..776a1612623 100644
--- a/clang/lib/CodeGen/MicrosoftRTTI.cpp
+++ b/clang/lib/CodeGen/MicrosoftRTTI.cpp
@@ -508,7 +508,7 @@ llvm::Constant *CodeGenModule::getMSTypeDescriptor(QualType Type) {
 llvm::Constant *
 CodeGenModule::getMSCompleteObjectLocator(const CXXRecordDecl *RD,
                                           const VPtrInfo *Info) {
-  if (!getLangOpts().RTTI)
+  if (!getLangOpts().RTTIData)
     return llvm::Constant::getNullValue(Int8PtrTy);
   return MSRTTIBuilder(*this, RD).getCompleteObjectLocator(Info);
 }