[Bug tree-optimization/82929] [8 regression] r254579 causes ICE: tree check: expected ssa_name, have array_ref in has_single_use, at ssa-iterators.h:400

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82929

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Nov 10 14:43:13 2017
New Revision: 254628

URL: https://gcc.gnu.org/viewcvs?rev=254628&root=gcc&view=rev
Log:
        PR tree-optimization/82929
        * gimple-ssa-store-merging.c (struct store_immediate_info): Add
        ops_swapped_p non-static data member.
        (store_immediate_info::store_immediate_info): Clear it.
        (imm_store_chain_info::coalesce_immediate_stores): If swapping
        ops set ops_swapped_p.
        (count_multiple_uses): Handle ops_swapped_p.

        * gcc.dg/pr82929.c: New test.
        * g++.dg/opt/pr82929.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/opt/pr82929.C
    trunk/gcc/testsuite/gcc.dg/pr82929.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-ssa-store-merging.c
    trunk/gcc/testsuite/ChangeLog