[Bug tree-optimization/125156] [13/14/15 Regression] ICE at -O3 during GIMPLE pass: fre

"cvs-commit at gcc dot gnu.org via Gcc-bugs" <[email protected]> Wed, 19 Aug 2026 09:44:42 +0000

Newsgroups	gmane.comp.gcc.bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125156

--- Comment #6 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-15 branch has been updated by Richard Biener
<[email protected]>:

https://gcc.gnu.org/g:99e00f7ee0e60c13a38d4c68197afd83862173fa

commit r15-11486-g99e00f7ee0e60c13a38d4c68197afd83862173fa
Author: Richard Biener <[email protected]>
Date:   Mon May 4 11:18:24 2026 +0200

    middle-end/125156 - preserve edge flags in cleanup_control_expr_graph

    cleanup_control_expr_graph when setting EDGE_FALLTHRU cleared all
    existing edge flags such as EDGE_IRREDUCIBLE_LOOP rather than
    just the no longer relevant EDGE_TRUE_VALUE and EDGE_FALSE_VALUE flags.

            PR middle-end/125156
            * tree-cfgcleanup.cc (cleanup_control_expr_graph): Clear
            EDGE_TRUE_VALUE and EDGE_FALSE_VALUE edge flags only.

            * gcc.dg/torture/pr125156.c: New testcase.

    (cherry picked from commit 7b804275b251cabc9699717713f3870b89ab3395)