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Subject: [Bug tree-optimization/104526] [12 Regression] Dead Code Elimination
 Regression at -O3 (trunk vs. 11.2.0)
Date: Tue, 15 Feb 2022 22:12:40 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104526

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Andrew Macleod <amacleod@gcc.gnu.org>:

https://gcc.gnu.org/g:e15425e899e4a9eec768cf74aaf36cdbf1d29913

commit r12-7253-ge15425e899e4a9eec768cf74aaf36cdbf1d29913
Author: Andrew MacLeod <amacleod@redhat.com>
Date:   Mon Feb 14 19:43:40 2022 -0500

    Use GORI to evaluate arguments of a COND_EXPR.

    Provide an API into gori to perform a basic evaluation of the arguments=
 of
a
    COND_EXPR if they are in the dependency chain of the condition.

            PR tree-optimization/104526
            gcc/
            * gimple-range-fold.cc (fold_using_range::range_of_cond_expr): =
Call
            new routine.
            * gimple-range-gori.cc (range_def_chain::get_def_chain): Force a
build
            of dependency chain if there isn't one.
            (gori_compute::condexpr_adjust): New.
            * gimple-range-gori.h (class gori_compute): New prototype.

            gcc/testsuite/
            * gcc.dg/pr104526.c: New.=