[Bug tree-optimization/52171] memcmp/strcmp/strncmp can be optimized when the result is tested for [in]equality with 0

[sch...@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52171

--- Comment #12 from Andreas Schwab <sch...@linux-m68k.org> ---
This breaks ada bootstrap on ia64, causing bootstrap comparison failure.

Bootstrap comparison failure!
gcc/ada/sem_ch13.o differs
make[1]: *** [compare] Error 1