[Bug rtl-optimization/65504] [4.9/5 Regression] select case with strings and -fgcse -O

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65504

--- Comment #4 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
... and -fsanitize=address also makes the bug go away.  Seems to be quite
picky.