[Bug target/92379] rs6000.c:5598:13: runtime error: shift exponent 64 is too large for 64-bit type 'long int'

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92379

--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Segher Boessenkool from comment #1)
> That's when building the compiler with -O0 only.

I also see it when doing a normal bootstrap with
--with-build-config=bootstrap-asan. Which should use -O2 -fsanitize=undefined
in stage2 and stage3.