[clang] Add vendor identity for Hygon Dhyana processor

[fanjinke]

Summary

The vendor id is used to determine whether the processor
supports hardware CRC32 in the Scudo code. The previous
discussion about the patch is in [1], and more information
about Hygon Dhyana processor is in[2].

Result of "make check":
Testing Time: 1339.56s

Unsupported Tests:   317
Expected Passes  : 36674
Expected Failures:   161

[100%] Built target check-llvm
[100%] Built target check

[1]: https://reviews.llvm.org/D62368
[2]: https://git.kernel.org/torvalds/c/c9661c1e80b609cd038db7c908e061f0535804ef

Signed-off-by: Jinke Fan <[e-mail]>

[fanjinke]

Hi Clayborg,

Please help with the patch review.

Thanks!

[clayborg]

I am not sure I am the right person to review? I work on LLDB and LLVM mostly.

[fanjinke]

Hi Clayborg,

Thanks for your replay!
I will add more reviewers who have previously reviewed this file.

Thanks.

[fanjinke]

Hi,
Please help with the patch review.

Thanks.

[craig.topper]

LGTM

[fanjinke]

Hi Craig，

I can't commit the patch myself because I don't have access.
Could you please help me？

Thanks.

clang/lib/Headers/cpuid.h

 /* CENTAUR: "CentaurHauls" */
 #define signature_CENTAUR_ebx 0x746e6543
 #define signature_CENTAUR_edx 0x48727561
 #define signature_CENTAUR_ecx 0x736c7561
 /* CYRIX:   "CyrixInstead" */
 #define signature_CYRIX_ebx 0x69727943
 #define signature_CYRIX_edx 0x736e4978
 #define signature_CYRIX_ecx 0x64616574
+/* HYGON:   "HygonGenuine" */
+#define signature_HYGON_ebx 0x6f677948
+#define signature_HYGON_edx 0x6e65476e
+#define signature_HYGON_ecx 0x656e6975
 /* INTEL:   "GenuineIntel" */
 #define signature_INTEL_ebx 0x756e6547
 #define signature_INTEL_edx 0x49656e69
 #define signature_INTEL_ecx 0x6c65746e
 /* TM1:     "TransmetaCPU" */
 #define signature_TM1_ebx 0x6e617254
 #define signature_TM1_edx 0x74656d73
 #define signature_TM1_ecx 0x55504361