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Subject: [Bug tree-optimization/93435] [8/9 Regression] Hang with -O2 on
 innocuous looking code with GCC 8.3
Date: Fri, 03 Apr 2020 18:33:22 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D93435

--- Comment #11 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Martin Jambor
<jamborm@gcc.gnu.org>:

https://gcc.gnu.org/g:a1bb16994caed4dacf8c9ee1a33b177df140e9dc

commit r9-8449-ga1bb16994caed4dacf8c9ee1a33b177df140e9dc
Author: Martin Jambor <mjambor@suse.cz>
Date:   Fri Apr 3 20:32:44 2020 +0200

    gcc-9 sra: Cap number of sub-access propagations with a param (PR 93435)

    This is non-trivial but rather straightforward backport of
    29f23ed79b60949fc60f6fdbbd931bd58090b241 from master.  See
    https://gcc.gnu.org/pipermail/gcc-patches/2020-March/542390.html for
    more information.

    2020-04-02  Martin Jambor  <mjambor@suse.cz>

            PR tree-optimization/93435
            * params.def (PARAM_SRA_MAX_PROPAGATIONS): New parameter.
            * tree-sra.c (propagation_budget): New variable.
            (budget_for_propagation_access): New function.
            (propagate_subaccesses_across_link): Use it.
            (propagate_all_subaccesses): Set up and destroy propagation_bud=
get.
            * doc/invoke.texi (sra-max-propagations): New.

            testsuite/
            * gcc.dg/tree-ssa/pr93435.c: New test.=