[Bug tree-optimization/93435] [8/9 Regression] Hang with -O2 on innocuous looking code with GCC 8.3

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93435

--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-8 branch has been updated by Martin Jambor
<jamb...@gcc.gnu.org>:

https://gcc.gnu.org/g:b445ceec81ba3f4afad8c3ead1e58f14f1c2e146

commit r8-10163-gb445ceec81ba3f4afad8c3ead1e58f14f1c2e146
Author: Martin Jambor <mjam...@suse.cz>
Date:   Fri Apr 3 22:01:17 2020 +0200

    gcc-8 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.

    Bootstrapped and tested on gcc-8 branch.

    2020-04-03  Martin Jambor  <mjam...@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_budget.
            * doc/invoke.texi (sra-max-propagations): New.

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