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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/114269] [14 Regression] Multiple 3-6% exec
 time regressions of 434.zeusmp since r14-9193-ga0b1798042d033
Date: Tue, 19 Mar 2024 12:12:05 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114269

--- Comment #8 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:e0e9499aeffdaca88f0f29334384aa5f710a81a4

commit r14-9540-ge0e9499aeffdaca88f0f29334384aa5f710a81a4
Author: Richard Biener <rguenther@suse.de>
Date:   Tue Mar 19 12:24:08 2024 +0100

    tree-optimization/114151 - revert PR114074 fix

    The following reverts the chrec_fold_multiply fix and only keeps
    handling of constant overflow which keeps the original testcase
    fixed.  A better solution might involve ranger improvements or
    tracking of assumptions during SCEV analysis similar to what niter
    analysis does.

            PR tree-optimization/114151
            PR tree-optimization/114269
            PR tree-optimization/114322
            PR tree-optimization/114074
            * tree-chrec.cc (chrec_fold_multiply): Restrict the use of
            unsigned arithmetic when actual overflow on constant operands
            is observed.

            * gcc.dg/pr68317.c: Revert last change.=