[Bug tree-optimization/81620] [8 Regression] ICE in is_inv_store_elimination_chain, at tree-predcom.c:1651 with -O3

["aldyh at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81620

--- Comment #5 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
Author: aldyh
Date: Wed Sep 13 16:11:23 2017
New Revision: 252210

URL: https://gcc.gnu.org/viewcvs?rev=252210&root=gcc&view=rev
Log:
        PR tree-optimization/81620
        * tree-predcom.c (add_ref_to_chain): Don't set has_max_use_after
        for store-store chain.

        gcc/testsuite
        * gcc.dg/tree-ssa/pr81620-1.c: New.
        * gcc.dg/tree-ssa/pr81620-2.c: New.

Added:
    branches/range-gen2/gcc/testsuite/gcc.dg/tree-ssa/pr81620-1.c
    branches/range-gen2/gcc/testsuite/gcc.dg/tree-ssa/pr81620-2.c
Modified:
    branches/range-gen2/gcc/ChangeLog
    branches/range-gen2/gcc/testsuite/ChangeLog
    branches/range-gen2/gcc/tree-predcom.c