https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112657
--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> --- (In reply to Andrew Pinski from comment #2) > Someone will have to debug ifcvt.cc to see why it fails on x86_64 but works > on aarch64. Note there are some new changes to ifcvt.cc in review which > might improve this, though I am not sure. x86_64 targetm.noce_conversion_profitable_p returns false for: (insn 20 0 19 (set (reg:SI 101) (const_int -9 [0xfffffffffffffff7])) 85 {*movsi_internal} (nil)) (insn 19 20 21 (set (reg:CCZ 17 flags) (compare:CCZ (reg/v:SI 99 [ c ]) (const_int 14 [0xe]))) 11 {*cmpsi_1} (nil)) (insn 21 19 0 (set (reg/v:SI 99 [ c ]) (if_then_else:SI (ne (reg:CCZ 17 flags) (const_int 0 [0])) (reg/v:SI 99 [ c ]) (reg:SI 101))) 1438 {*movsicc_noc} (nil))