[Bug tree-optimization/126404] [16/17 Regression] ICE at -O2/3 on aarch64 during GIMPLE pass: vect

"pinskia at gcc dot gnu.org via Gcc-bugs" <[email protected]> Sat, 25 Jul 2026 18:30:31 +0000

Newsgroups	gmane.comp.gcc.bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126404

--- Comment #3 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 65129
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65129&action=edit
Reduced testcase

There is a missed optimization after vec_ch:
  _1 = 0;
  _18 = (unsigned int) _16;
  if (_1 != 0)
    goto <bb 7>; [89.00%]
  else
    goto <bb 5>; [11.00%]

The 0 comes from the __builtin_add_overflow.