[llvm-branch-commits] [llvm] release/18.x: [X86][Driver] Do not add `-evex512` for `-march=native` when the target doesn't support AVX512 (#91694) (PR #91705)

[Sam James via llvm-branch-commits]

thesamesam wrote:

@tstellar We've had a load of reports from this breaking compiles on machines without AVX512 for e.g. LibreOffice, Chromium. Could this be included in .6 please?

https://github.com/llvm/llvm-project/pull/91705