[PATCH] D135937: [X86] Support -march=raptorlake, meteorlake

Tue Nov 1 01:23:11 PDT 2022

FreddyYe added a comment.

In D135937#3898228 <https://reviews.llvm.org/D135937#3898228>, @FreddyYe wrote:

> For saving capacity of ProcessorSubtypes, gcc decided to not support part of compiler features of these two cpus:
>
>   __builtin_cpu_is("meteorlake")
>   __attribute__((target("arch=raptorlake")))
>   ... some others I don't know.
>
> Gcc's related patch:
> raptorlake <https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=470a0659b508d684148f362c4dc0eccf5a83a23e> and meteorlake <https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=fd206f0e95fb6f41b96eaaaab1dc0c30378e5e08>
> Updated to align with gcc first. Welcome opinions and review!

My opinion is to aligin with gcc first: supported basic -march=xxx only for these two cpus and to support the features mentioned above in the future if needed. Moreover, these two cpus may have dedicated AdditionalTuning features in the future, we can also add at that time.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D135937/new/

https://reviews.llvm.org/D135937