https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107172
--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> --- i386 needs to change (ltu:SI (const_int 1 [1]) (const_int 0 [0])) to (ne:SI (const_int 1 [1]) (const_int 0 [0])) when checking the carry flag. But the mode info isn't passed to TARGET_CANONICALIZE_COMPARISON.