[clang] [compiler-rt] [llvm] [X86] Support -march=diamondrapids (PR #113881)

[Freddy Ye via cfe-commits]

FreddyLeaf wrote:

> Looks like this breaks tests: http://45.33.8.238/linux/153081/step_6.txt
> 
> Please take a look and revert for now if it takes a while to fix.

Thanks reminding. Revert first.

https://github.com/llvm/llvm-project/pull/113881