[Bug tree-optimization/90447] Missed opportunities to use adc (worse when -1 is involved)

[cassio.neri at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90447

--- Comment #1 from Cassio Neri <cassio.neri at gmail dot com> ---
Forgot to mention this discussion on SO:

https://stackoverflow.com/questions/56101507/is-there-anything-special-about-1-0xffffffff-regarding-adc