================
@@ -762,4 +762,35 @@ void AnnotateIgnoreWritesEnd(const char *file, int line);
#endif
// clang-format on
+/// \macro LLVM_IS_X86
+/// Whether the target architecture is x86 / x86-64.
+#if defined(__x86_64__) || defined(__i386__)
+#define LLVM_IS_X86 1
+#else
+#define LLVM_IS_X86 0
+#endif
+
+/// \macro LLVM_TARGET_SSE42
+/// Function attribute to compile a function with SSE4.2 enabled.
+#if defined(__has_attribute) && __has_attribute(target)
+#define LLVM_TARGET_SSE42 __attribute__((target("sse4.2")))
+#else
+#define LLVM_TARGET_SSE42
+#endif
+
+#if __has_builtin(__builtin_cpu_supports)
+#define LLVM_CPU_SUPPORTS(feature) __builtin_cpu_supports(feature)
----------------
Thibault-Monnier wrote:
Thanks for your help. Unfortunately, I do not know much about MSVC
environments, so I will leave out Windows from the runtime check. If you wish,
you can always open a separate PR later to improve this.
https://github.com/llvm/llvm-project/pull/180631
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