[Bug sanitizer/87837] [8/9 Regression] -O2 -fsanitize=signed-integer-overflow misses overflows on x86-64

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87837

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Just have to repeat that I very much dislike TYPE_OVERFLOW_SANITIZED being
sprinkled all over the place...  just instrument before folding things?