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Subject: [Bug tree-optimization/102983] [12 Regression] Dead Code Elimination
 Regression at -O3 (trunk vs 11.2.0)
Date: Fri, 29 Oct 2021 14:43:41 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102983

--- Comment #3 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:cb596fd43667f92c4cb037a4ee8b2061c393ba60

commit r12-4788-gcb596fd43667f92c4cb037a4ee8b2061c393ba60
Author: Andrew MacLeod <amacleod@redhat.com>
Date:   Thu Oct 28 13:31:17 2021 -0400

    Perform on-entry propagation after range_of_stmt on a gcond.

    Propagation is automatically done by the temporal cache when defs are
    out of date from the names on the RHS, but a gcond has no LHS, and any
    updates on the RHS are never propagated.  Always propagate them.

            gcc/
            PR tree-optimization/102983
            * gimple-range-cache.h (propagate_updated_value): Make public.
            * gimple-range.cc (gimple_ranger::range_of_stmt): Propagate exp=
orts
            when processing gcond stmts.

            gcc/testsuite/
            * gcc.dg/pr102983.c: New.=