[Bug target/127773] [x86] vzeroupper missing before call to IPA-RA-known non-AVX callee, causing SSE/AVX transition assists

[michiel.van.slobbe at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127773

--- Comment #10 from Michiel van Slobbe <michiel.van.slobbe at gmail dot com> 
---
Created attachment 65822
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65822&action=edit
simdutf validate_utf8_with_counts repro (129 bytes, error at 64)