[GR-53048] Backport 23.1: Workaround CPU features Xcode 15 miscomp is…

…sue.

PullRequest: graal/17423

substratevm/src/com.oracle.svm.native.libchelper/src/cpuid.c

@@ -28,6 +28,12 @@
 #include <stdint.h>
 #include <string.h>
 
+#if defined(_MSC_VER) && !defined(__clang__)
+#define NO_INLINE __declspec(noinline)
+#else
+#define NO_INLINE __attribute__((noinline))
+#endif
+
 #ifndef _WIN64
 #include <alloca.h>
 #else
@@ -381,8 +387,10 @@ static void initialize_cpuinfo(CpuidInfo *_cpuid_info)
   }
 }
 
-// ported from from vm_version_x86.hpp::feature_flags
-static void set_cpufeatures(CPUFeatures *features, CpuidInfo *_cpuid_info)
+// ported from from vm_version_x86.cpp::feature_flags
+// NO_INLINE is necessary to avoid an unexpected behavior if compiling on Darwin
+// with Apple clang version 15.0.0 (included in Xcode 15.0).
+NO_INLINE static void set_cpufeatures(CPUFeatures *features, CpuidInfo *_cpuid_info)
 {
   if (_cpuid_info->std_cpuid1_edx.bits.cmpxchg8 != 0)
     features->fCX8 = 1;