================
@@ -0,0 +1,63 @@
+//===--- CGPointerAuth.cpp - IR generation for pointer authentication
-----===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains common routines relating to the emission of
+// pointer authentication operations.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CodeGenModule.h"
+#include "clang/CodeGen/CodeGenABITypes.h"
+
+using namespace clang;
+using namespace CodeGen;
+
+/// Build a signed-pointer "ptrauth" constant.
+static llvm::ConstantPtrAuth *
+buildConstantAddress(CodeGenModule &CGM, llvm::Constant *Pointer, unsigned Key,
+ llvm::Constant *StorageAddress,
+ llvm::Constant *OtherDiscriminator) {
+ llvm::Constant *AddressDiscriminator = nullptr;
----------------
kovdan01 wrote:
Do we need to set this to `nullptr`? We 100% define this in either `if` or
`else` branch and do not use the unitialized value before. Same applies to
`IntegerDiscriminator` below.
You can also use smth like
```
llvm::Constant *AddressDiscriminator =
(StorageAddress ? StorageAddress
: llvm::Constant::getNullValue(CGM.UnqualPtrTy));
assert(!StorageAddress || (StorageAddress->getType() == CGM.UnqualPtrTy));
```
https://github.com/llvm/llvm-project/pull/93904
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