[llvm-branch-commits] [clang] callee_type metadata for indirect calls (PR #117036)

[Prabhu Rajasekaran via llvm-branch-commits]

================
@@ -2873,14 +2890,33 @@ void 
CodeGenModule::CreateFunctionTypeMetadataForIcall(const FunctionDecl *FD,
 
   llvm::Metadata *MD = CreateMetadataIdentifierForType(FD->getType());
   F->addTypeMetadata(0, MD);
-  F->addTypeMetadata(0, CreateMetadataIdentifierGeneralized(FD->getType()));
+  // Add the generalized identifier if not added already.
+  if (!HasExistingGeneralizedTypeMD(F))
+    F->addTypeMetadata(0, CreateMetadataIdentifierGeneralized(FD->getType()));
 
   // Emit a hash-based bit set entry for cross-DSO calls.
   if (CodeGenOpts.SanitizeCfiCrossDso)
     if (auto CrossDsoTypeId = CreateCrossDsoCfiTypeId(MD))
       F->addTypeMetadata(0, llvm::ConstantAsMetadata::get(CrossDsoTypeId));
 }
 
+void CodeGenModule::CreateCalleeTypeMetadataForIcall(const QualType &QT,
+                                                     llvm::CallBase *CB) {
+  // Only if needed for call graph section and only for indirect calls.
+  if (!CodeGenOpts.CallGraphSection || !CB->isIndirectCall())
+    return;
+
+  llvm::Metadata *TypeIdMD = CreateMetadataIdentifierGeneralized(QT);
+  llvm::MDTuple *TypeTuple = llvm::MDTuple::get(
+      getLLVMContext(), {llvm::ConstantAsMetadata::get(llvm::ConstantInt::get(
+                             llvm::Type::getInt64Ty(getLLVMContext()), 0)),
+                         TypeIdMD});
+  SmallVector<llvm::Metadata *, 1> TypeIdMDList;
+  TypeIdMDList.push_back(TypeTuple);
+  llvm::MDTuple *MDN = llvm::MDNode::get(getLLVMContext(), TypeIdMDList);
----------------
Prabhuk wrote:

That worked! Thank you.

https://github.com/llvm/llvm-project/pull/117036
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