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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/110924] [14 Regression] ICE on valid code at
 -O{s,2,3} on x86_64-linux-gnu: verify_ssa failed
Date: Tue, 08 Aug 2023 12:24:34 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110924

--- Comment #13 from CVS 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:31ec413098bd334115aff73fc755e49afd3ac371

commit r14-3076-g31ec413098bd334115aff73fc755e49afd3ac371
Author: Richard Biener <rguenther@suse.de>
Date:   Tue Aug 8 12:46:42 2023 +0200

    tree-optimization/110924 - fix vop liveness for noreturn const CFG parts

    The virtual operand live problem used by sinking assumes we have
    virtual uses at each end point of the CFG but as shown in the PR
    this isn't true for parts for example ending in __builtin_unreachable.
    The following removes the optimization made possible by this and
    now requires marking backedges.

            PR tree-optimization/110924
            * tree-ssa-live.h (virtual_operand_live): Update comment.
            * tree-ssa-live.cc (virtual_operand_live::get_live_in): Remove
            optimization, look at each predecessor.
            * tree-ssa-sink.cc (pass_sink_code::execute): Mark backedges.

            * gcc.dg/torture/pr110924.c: New testcase.=