[Bug tree-optimization/126648] [16/17 Regression] ICE at -O3 on x86_64-linux-gnu during GIMPLE pass: vrp

"cvs-commit at gcc dot gnu.org via Gcc-bugs" <[email protected]> Tue, 11 Aug 2026 17:39:44 +0000

Newsgroups	gmane.comp.gcc.bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126648

--- Comment #3 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Andrew Macleod <[email protected]>:

https://gcc.gnu.org/g:0bf6e399dbc8e1f6d2b3f7e0f3a0cab9ac55b572

commit r17-3203-g0bf6e399dbc8e1f6d2b3f7e0f3a0cab9ac55b572
Author: Andrew MacLeod <[email protected]>
Date:   Wed Aug 5 14:05:33 2026 -0400

    Check for undefined in operator_lshift::op1_range.

    If we conclude that the op1_range calculation is undefined, simply
    abort the calculation.

            PR tree-optimization/126648
            gcc/
            * range-op.cc (operator_lshift::op1_range): Handle undefined.

            gcc/testsuite/
            * gcc.dg/pr126648.c: New.