vendor/llvm-project/llvmorg-11-init-20887-g2e10b7a39b9vendor/llvm-project/master

1 files changed, 12 insertions, 1 deletions

diff --git a/compiler-rt/lib/scudo/scudo_utils.cpp b/compiler-rt/lib/scudo/scudo_utils.cpp
index 5e76a4a30f10..f31d68058acb 100644
--- a/compiler-rt/lib/scudo/scudo_utils.cpp
+++ b/compiler-rt/lib/scudo/scudo_utils.cpp
@@ -62,6 +62,14 @@ FORMAT(1, 2) void NORETURN dieWithMessage(const char *Format, ...) {
 # ifndef bit_SSE4_2
 #  define bit_SSE4_2 bit_SSE42  // clang and gcc have different defines.
 # endif
+
+#ifndef signature_HYGON_ebx // They are not defined in gcc.
+// HYGON: "HygonGenuine".
+#define signature_HYGON_ebx 0x6f677948
+#define signature_HYGON_edx 0x6e65476e
+#define signature_HYGON_ecx 0x656e6975
+#endif
+
 bool hasHardwareCRC32() {
   u32 Eax, Ebx, Ecx, Edx;
   __get_cpuid(0, &Eax, &Ebx, &Ecx, &Edx);
@@ -71,7 +79,10 @@ bool hasHardwareCRC32() {
   const bool IsAMD = (Ebx == signature_AMD_ebx) &&
                      (Edx == signature_AMD_edx) &&
                      (Ecx == signature_AMD_ecx);
-  if (!IsIntel && !IsAMD)
+  const bool IsHygon = (Ebx == signature_HYGON_ebx) &&
+                       (Edx == signature_HYGON_edx) &&
+                       (Ecx == signature_HYGON_ecx);
+  if (!IsIntel && !IsAMD && !IsHygon)
     return false;
   __get_cpuid(1, &Eax, &Ebx, &Ecx, &Edx);
   return !!(Ecx & bit_SSE4_2);