[llvm-branch-commits] [llvm] release/18.x: [X86][EVEX512] Add `HasEVEX512` when `NoVLX` used for 512-bit patterns (#91106) (PR #91118)

[Phoebe Wang via llvm-branch-commits]

phoebewang wrote:

> @phoebewang (or anyone else). If you would like to add a note about this fix in the release notes (completely optional). Please reply to this comment with a one or two sentence description of the fix. When you are done, please add the release:note label to this PR.

This patch fixes compiler crush when user specifies `-mno-evex512` with AVX512 features but no AVX512VL.

https://github.com/llvm/llvm-project/pull/91118