[Bug tree-optimization/119977] [16 regression] Bootstrap comparison failure with -march=znver4 -ggdb3 and bootstrap-lto since r16-152-g4f7b3c24112016

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119977

--- Comment #20 from Sam James <sjames at gcc dot gnu.org> ---
(In reply to Sam James from comment #18)
> * Bisecting between basepoints/gcc-15 and trunk for a difference in a
> constant source file (reduced gimple-match-6.cc from
> r16-152-g4f7b3c24112016) yields r15-7652-ga2755339c6c983.

Reverting that doesn't help though at r16-152-g4f7b3c24112016, so maybe it was
bogus.