[Bug tree-optimization/120443] [13/14/15 regression] wrong code at -O3 since r15-1809

[mikpelinux at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120443

Mikael Pettersson <mikpelinux at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |mikpelinux at gmail dot com

--- Comment #8 from Mikael Pettersson <mikpelinux at gmail dot com> ---
The original test case, with d static and the printf replaced by `if (ak != -1)
__builtin_abort ();`, stopped failing with r16-2782-g5d55cd95e2bbb1:

5d55cd95e2bbb1114a59ca743671188634e757cc is the first new commit
commit 5d55cd95e2bbb1114a59ca743671188634e757cc
Author: Richard Biener <rguenther@suse.de>
Date:   Tue Aug 5 10:38:03 2025 +0200

    tree-optimization/121382 - avoid UB in IVOPTs inserted step computation

The revised test case in #c2 stopped failing sometime earlier.