[Bug target/126556] [15/16/17 Regression] ICE at -O2 on aarch64 during RTL pass: combine

"pinskia at gcc dot gnu.org via Gcc-bugs" <[email protected]> Sat, 01 Aug 2026 06:21:50 +0000

Newsgroups	gmane.comp.gcc.bugs
Message-ID	<[email protected]/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126556

--- Comment #3 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Oh I missed this:
Successfully matched this instruction:
(set (reg:DI 111 [ _2 ])
    (zero_extend:DI (gt:SI (reg:CC 66 cc)
            (const_int 0 [0]))))

So it is not ext_dce happening but rather combine order changed slightly.