[Bug tree-optimization/118895] [15 regression] ICE: during GIMPLE pass: pre

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118895

--- Comment #4 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:dfd0ced98fcf62c4d24979b74c1d52334ff62bfc

commit r15-7589-gdfd0ced98fcf62c4d24979b74c1d52334ff62bfc
Author: Richard Biener <rguenther@suse.de>
Date:   Mon Feb 17 11:40:01 2025 +0100

    tree-optimization/118895 - ICE during PRE

    When we simplify a NARY during PHI translation we have to make sure
    to not inject not available operands into it given that might violate
    the valueization hook constraints and we'd pick up invalid
    context-sensitive data in further simplification or as in this case
    later ICE when we try to insert the expression.

            PR tree-optimization/118895
            * tree-ssa-sccvn.cc (vn_nary_build_or_lookup_1): Only allow
            CSE if we can verify the result is available.

            * gcc.dg/pr118895.c: New testcase.