vendor/llvm-project/llvmorg-15-init-17827-gd77882e66779vendor/llvm-project/llvmorg-15-init-17826-g1f8ae9d7e7e4

1 files changed, 10 insertions, 4 deletions

diff --git a/clang/lib/CodeGen/CGClass.cpp b/clang/lib/CodeGen/CGClass.cpp
index cde31711a7db..c6696c4df775 100644
--- a/clang/lib/CodeGen/CGClass.cpp
+++ b/clang/lib/CodeGen/CGClass.cpp
@@ -2698,15 +2698,21 @@ void CodeGenFunction::EmitTypeMetadataCodeForVCall(const CXXRecordDecl *RD,
            // Don't insert type test assumes if we are forcing public
            // visibility.
            !CGM.AlwaysHasLTOVisibilityPublic(RD)) {
-    llvm::Metadata *MD =
-        CGM.CreateMetadataIdentifierForType(QualType(RD->getTypeForDecl(), 0));
+    QualType Ty = QualType(RD->getTypeForDecl(), 0);
+    llvm::Metadata *MD = CGM.CreateMetadataIdentifierForType(Ty);
     llvm::Value *TypeId =
         llvm::MetadataAsValue::get(CGM.getLLVMContext(), MD);
 
     llvm::Value *CastedVTable = Builder.CreateBitCast(VTable, Int8PtrTy);
+    // If we already know that the call has hidden LTO visibility, emit
+    // @llvm.type.test(). Otherwise emit @llvm.public.type.test(), which WPD
+    // will convert to @llvm.type.test() if we assert at link time that we have
+    // whole program visibility.
+    llvm::Intrinsic::ID IID = CGM.HasHiddenLTOVisibility(RD)
+                                  ? llvm::Intrinsic::type_test
+                                  : llvm::Intrinsic::public_type_test;
     llvm::Value *TypeTest =
-        Builder.CreateCall(CGM.getIntrinsic(llvm::Intrinsic::type_test),
-                           {CastedVTable, TypeId});
+        Builder.CreateCall(CGM.getIntrinsic(IID), {CastedVTable, TypeId});
     Builder.CreateCall(CGM.getIntrinsic(llvm::Intrinsic::assume), TypeTest);
   }
 }