llvmbot wrote:

<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Mike Hommey (glandium)

<details>
<summary>Changes</summary>

The macro is set by Xcode clang for the arm64e-apple-* targets, and ifdefed in 
the macOS and iPhoneOS SDKs.

---
Full diff: https://github.com/llvm/llvm-project/pull/172944.diff


2 Files Affected:

- (modified) clang/lib/Basic/Targets/AArch64.cpp (+3-1) 
- (modified) clang/test/Preprocessor/arm64e.c (+1) 


``````````diff
diff --git a/clang/lib/Basic/Targets/AArch64.cpp 
b/clang/lib/Basic/Targets/AArch64.cpp
index ecd441be364c2..7ff67e4f66b45 100644
--- a/clang/lib/Basic/Targets/AArch64.cpp
+++ b/clang/lib/Basic/Targets/AArch64.cpp
@@ -1786,8 +1786,10 @@ void 
clang::targets::getAppleMachOAArch64Defines(MacroBuilder &Builder,
   Builder.defineMacro("__arm64", "1");
   Builder.defineMacro("__arm64__", "1");
 
-  if (Triple.isArm64e())
+  if (Triple.isArm64e()) {
     Builder.defineMacro("__arm64e__", "1");
+    Builder.defineMacro("__PTRAUTH_INTRINSICS__", "1");
+  }
 }
 
 void AppleMachOAArch64TargetInfo::getOSDefines(const LangOptions &Opts,
diff --git a/clang/test/Preprocessor/arm64e.c b/clang/test/Preprocessor/arm64e.c
index 26653ace5852b..3b9f8216387fb 100644
--- a/clang/test/Preprocessor/arm64e.c
+++ b/clang/test/Preprocessor/arm64e.c
@@ -1,5 +1,6 @@
 // RUN: %clang_cc1 -E -dM -ffreestanding -triple=arm64e-apple-ios < /dev/null 
| FileCheck %s
 
 // CHECK: #define __ARM64_ARCH_8__ 1
+// CHECK: #define __PTRAUTH_INTRINSICS__ 1
 // CHECK: #define __arm64__ 1
 // CHECK: #define __arm64e__ 1

``````````

</details>


https://github.com/llvm/llvm-project/pull/172944
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