[libc-commits] [libc] [libc] suppress string warning in case intrinsics are defined as macros (PR #117640)

[via libc-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-libc

Author: Schrodinger ZHU Yifan (SchrodingerZhu)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/117640.diff


1 Files Affected:

- (modified) libc/src/string/memory_utils/op_x86.h (+3) 


``````````diff
diff --git a/libc/src/string/memory_utils/op_x86.h b/libc/src/string/memory_utils/op_x86.h
index ab694e25fe0fe1..309610e4ad6307 100644
--- a/libc/src/string/memory_utils/op_x86.h
+++ b/libc/src/string/memory_utils/op_x86.h
@@ -29,12 +29,15 @@
 // Define fake functions to prevent the compiler from failing on undefined
 // functions in case the CPU extension is not present.
 #if !defined(__AVX512BW__) && (defined(_MSC_VER) || defined(__SCE__))
+#undef _mm512_cmpneq_epi8_mask
 #define _mm512_cmpneq_epi8_mask(A, B) 0
 #endif
 #if !defined(__AVX2__) && (defined(_MSC_VER) || defined(__SCE__))
+#undef _mm256_movemask_epi8
 #define _mm256_movemask_epi8(A) 0
 #endif
 #if !defined(__SSE2__) && (defined(_MSC_VER) || defined(__SCE__))
+#undef _mm_movemask_epi8
 #define _mm_movemask_epi8(A) 0
 #endif
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/117640