[Bug middle-end/124491] [14/15 Regression] ICE in fold_vec_perm during ccp with -msve-vector-bits=256

[rguenther at suse dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124491

--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> ---
On Mon, 16 Mar 2026, cvs-commit at gcc dot gnu.org wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124491
> 
> --- Comment #7 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
> The releases/gcc-15 branch has been updated by Alex Coplan
> <acoplan@gcc.gnu.org>:
> 
> https://gcc.gnu.org/g:1a6b4f4da6703835a754140941049042737ef9ad
> 
> commit r15-10977-g1a6b4f4da6703835a754140941049042737ef9ad
> Author: Alex Coplan <alex.coplan@arm.com>
> Date:   Mon Mar 16 11:57:23 2026 +0000
> 
>     aarch64, testsuite: Add test for PR124491
> 
>     This adds a testcase for PR124491, which was fixed by backporting the
>     following commits to the 15 branch:
> 
>     r16-6709-ga4716ece529dfd29d169ccc96979f7c747231f25
>     r16-6743-ge787d5ace5cc315892868f3e5e2a2a16fd31bcc8
> 
>     as:
> 
>     g:fad99a08936 middle-end/123573 - fix VEC_PERM folding more
>     g:bebd813a400 middle-end/123175 - fix parts of const VEC_PERM with relaxed
> input sizes
> 
>     gcc/testsuite/ChangeLog:
> 
>             PR middle-end/124491
>             * gcc.target/aarch64/torture/pr124491.c: New test.

Please make sure to add this testcase also to trunk.