[Bug tree-optimization/59221] [4.9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu

[law at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59221

--- Comment #5 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Thu Nov 21 19:45:16 2013
New Revision: 205229

URL: http://gcc.gnu.org/viewcvs?rev=205229&root=gcc&view=rev
Log:
    PR tree-optimization/59221
    * tree-ssa-threadedge.c (thread_across_edge): Properly manage
    temporary equivalences when threading through joiner blocks.

    PR tree-optimization/59221
    * gcc.c-torture/execute/pr59221.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr59221.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-threadedge.c