[Bug tree-optimization/123152] [16 regression] ICE when building Valgrind (dominator of 15 should be 42, not 44) since r16-6133-gca8d97f8cb8

[victorldn at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123152

--- Comment #9 from Victor Do Nascimento <victorldn at gcc dot gnu.org> ---
Proposed fix posted for review:
https://gcc.gnu.org/pipermail/gcc-patches/2025-December/704086.html

I've included both of the reduced testcases presented here as accompanying unit
tests to the patch (together with the test from PR123187).

Please let me know whether you face any other problems based on any of your
unreported cases.