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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/107137] (unsigned)-(int)(bool_var) should be
 optimized to -(unsigned)bool_var
Date: Tue, 05 Sep 2023 21:16:17 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107137

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Andrew Pinski <pinskia@gcc.gnu.org>:

https://gcc.gnu.org/g:e6bcf83989478348428c732c11e6c0f1719e9214

commit r14-3721-ge6bcf83989478348428c732c11e6c0f1719e9214
Author: Andrew Pinski <apinski@marvell.com>
Date:   Thu Aug 31 16:17:35 2023 -0700

    MATCH: `(nop_convert)-(convert)a` into -(convert)a if we are converting
from something smaller

    This allows removal of one conversion and in the case of booleans, migh=
t be
able to remove
    the negate and the other conversion later on.

    OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.

            PR tree-optimization/107137

    gcc/ChangeLog:

            * match.pd (`(nop_convert)-(convert)a`): New pattern.

    gcc/testsuite/ChangeLog:

            * gcc.dg/tree-ssa/neg-cast-2.c: New test.
            * gcc.dg/tree-ssa/neg-cast-3.c: New test.=