[PATCH] D85384: [X86] Add basic support for -mtune command line option in clang

[Craig Topper via Phabricator via cfe-commits]

craig.topper added a comment.

In D85384#2226842 <https://reviews.llvm.org/D85384#2226842>, @aeubanks wrote:

> This doesn't work with -mtune=generic (https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html), can gcc compatibility be added?
>
> (https://crbug.com/1119448)
>
>   $ cat /tmp/a.c
>   int main(){}
>   $ ./build/bin/clang /tmp/a.c -o /dev/null -mtune=generic
>   error: unknown target CPU 'generic'
>   note: valid target CPU values are: nocona, core2, penryn, bonnell, atom, silvermont, slm, goldmont, goldmont-plus, tremont, nehalem, corei7, westmere, sandybridge, corei7-avx, ivybridge, core-avx-i, haswell, core-avx2, broadwell, skylake, skylake-avx512, skx, cascadelake, cooperlake, cannonlake, icelake-client, icelake-server, tigerlake, knl, knm, k8, athlon64, athlon-fx, opteron, k8-sse3, athlon64-sse3, opteron-sse3, amdfam10, barcelona, btver1, btver2, bdver1, bdver2, bdver3, bdver4, znver1, znver2, x86-64

I was planning to do work supporting that as one of my next patches. But didn't think about the fact that people would already doing it since the option was being ignored. I'll put in a quick fix.


Repository:
  rG LLVM Github Monorepo

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https://reviews.llvm.org/D85384