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

[amker at gcc dot gnu.org]

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

--- Comment #3 from amker at gcc dot gnu.org ---
Author: amker
Date: Tue Aug  1 09:17:29 2017
New Revision: 250763

URL: https://gcc.gnu.org/viewcvs?rev=250763&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:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr81620-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr81620-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-predcom.c