[Bug middle-end/111009] [12/13/14 regression] -fno-strict-overflow erroneously elides null pointer checks and causes SIGSEGV on perf from linux-6.4.10

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111009

--- Comment #7 from Sergei Trofimovich <slyfox at gcc dot gnu.org> ---
commit bd400db6d3ec167142ace352db00f84d382e33a8 (HEAD)
Date:   Fri Oct 15 12:06:27 2021 -0400

  Add --param=vrp1-mode and --param=vrp2-mode.

(the first commit that adds the option) generates SIGSEGVs all the same:

$ gcc/xgcc -Bgcc ~/dev/bugs/gcc-14-perf-wrong-code-PR111009/bug.c.c
-fno-strict-overflow -O3 -o bug --param=vrp2-mode=ranger && ./bug
Segmentation fault (core dumped)

Not much to bisect.