[Bug tree-optimization/119640] [15 regression] ICE: verify_ssa failed error compiling gem5 since r15-3509-gd34cda72098867

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119640

--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rgue...@gcc.gnu.org>:

https://gcc.gnu.org/g:a4abf0fb902816a2508dda5956f407fc27821d88

commit r15-9249-ga4abf0fb902816a2508dda5956f407fc27821d88
Author: Richard Biener <rguent...@suse.de>
Date:   Mon Apr 7 11:27:19 2025 +0200

    tree-optimization/119640 - ICE with vectorized shift placement

    When the whole shift is invariant but the shift amount needs
    to be converted and a vector shift used we can mess up placement
    of vector stmts because we do not make SLP scheduling aware of
    the need to insert code for it.  The following mitigates this
    by more conservative placement of such code in vectorizable_shift.

            PR tree-optimization/119640
            * tree-vect-stmts.cc (vectorizable_shift): Always insert code
            for one of our SLP operands before the code for the vector
            shift itself.

            * gcc.dg/vect/pr119640.c: New testcase.