[llvm-branch-commits] [clang] release/20.x: [SystemZ] Add header guard macros to vecintrin.h (#129170) (PR #129286)

[via llvm-branch-commits]

https://github.com/llvmbot created https://github.com/llvm/llvm-project/pull/129286

Backport ddaa5b3bfb2980f79c6f277608ad33a6efe8d554

Requested by: @uweigand

>From 290d4aef3ac84d0bd60243a850fc87553c714835 Mon Sep 17 00:00:00 2001
From: Jonathan Albrecht <jonathan.albrecht at ibm.com>
Date: Fri, 28 Feb 2025 04:16:19 -0500
Subject: [PATCH] [SystemZ] Add header guard macros to vecintrin.h (#129170)

Add header guard macros to clang/lib/Headers/vecintrin.h. Found while
compiling the latest numpy with clang 19 on s390x which ends up
including vecintrin.h twice. The gcc version of this file has header
guards so numpy compiles fine with gcc.

Signed-off-by: Jonathan Albrecht <jonathan.albrecht at ibm.com>
(cherry picked from commit ddaa5b3bfb2980f79c6f277608ad33a6efe8d554)
---
 clang/lib/Headers/vecintrin.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/clang/lib/Headers/vecintrin.h b/clang/lib/Headers/vecintrin.h
index a14c39f9f7313..338ea51ce8863 100644
--- a/clang/lib/Headers/vecintrin.h
+++ b/clang/lib/Headers/vecintrin.h
@@ -7,6 +7,9 @@
  *===-----------------------------------------------------------------------===
  */
 
+#ifndef _VECINTRIN_H
+#define _VECINTRIN_H
+
 #if defined(__s390x__) && defined(__VEC__)
 
 #define __ATTRS_ai __attribute__((__always_inline__))
@@ -12861,3 +12864,5 @@ vec_search_string_until_zero_cc(__vector unsigned int __a,
 #error "Use -fzvector to enable vector extensions"
 
 #endif
+
+#endif /* _VECINTRIN_H */