[Bug tree-optimization/69468] tail merge should ignore private edge flags

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69468

--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
Author: vries
Date: Mon Jul  3 07:23:01 2017
New Revision: 249895

URL: https://gcc.gnu.org/viewcvs?rev=249895&root=gcc&view=rev
Log:
Ignore EDGE_{DFS_BACK,EXECUTABLE} in tail-merge

2017-07-03  Tom de Vries  <t...@codesourcery.com>

        PR tree-optimization/69468
        * tree-ssa-tail-merge.c (ignore_edge_flags): New constant.
        (find_same_succ_bb): Handle ignore_edge_flags.

        * gcc.dg/pr81192.c: Update.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/pr81192.c
    trunk/gcc/tree-ssa-tail-merge.c