[Bug tree-optimization/90018] [8 Regression] r265453 miscompiled 527.cam4_r in SPEC CPU 2017

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90018

--- Comment #12 from Martin Liška <marxin at gcc dot gnu.org> ---
Theoretically similar to PR87214, but the patch was backported and this issues
is present in 8.3.1.