[Bug tree-optimization/70754] [6 Regression] ICE during predictive commoning

[amker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70754

--- Comment #18 from amker at gcc dot gnu.org ---
Author: amker
Date: Wed Nov 15 16:16:49 2017
New Revision: 254777

URL: https://gcc.gnu.org/viewcvs?rev=254777&root=gcc&view=rev
Log:
        PR tree-optimization/82726
        Revert
        2017-01-23  Bin Cheng  <bin.cheng@arm.com>

        PR tree-optimization/70754
        * tree-predcom.c (stmt_combining_refs): New parameter INSERT_BEFORE.
        (reassociate_to_the_same_stmt): New parameter INSERT_BEFORE.  Insert
        combined stmt before it if not NULL.
        (combine_chains): Process refs reversely and compute dominance point
        for root ref.

        Revert
        2017-02-23  Bin Cheng  <bin.cheng@arm.com>

        PR tree-optimization/79663
        * tree-predcom.c (combine_chains): Process refs in reverse order
        only for ZERO length chains, and add explaining comment.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-predcom.c