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Subject: [Bug tree-optimization/101223] [11 Regression] evrp produces wrong
 code since r11-3685-gfcae5121154d1c33
Date: Wed, 14 Jul 2021 21:58:54 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101223

--- Comment #14 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Andrew Macleod
<amacleod@gcc.gnu.org>:

https://gcc.gnu.org/g:b977e6b29c67be81df882d1f5cc7eb6a5d8c98a0

commit r11-8751-gb977e6b29c67be81df882d1f5cc7eb6a5d8c98a0
Author: Andrew MacLeod <amacleod@redhat.com>
Date:   Wed Jun 30 14:15:53 2021 -0400

    Fix build_gt and build_lt for signed 1 bit values.

    Signed 1 bit values have a range of [-1, 0] but neither (0 - 1) nor (-1=
 +
1)
    can be represented.  For signed values, add or subtract -1 as appropria=
te.

            PR tree-optimization/101223
            gcc/
            * range-op.cc (build_lt): Add -1 for signed values.
            (built_gt): Subtract -1 for signed values.

            gcc/testsuite/
            * gcc.dg/pr101223.c: New.

    (cherry picked from commit 84f7bab89279ca1234fef88929c74caeda8cb55e)=