[Bug tree-optimization/60902] [4.9/4.10 Regression] ffmpeg built with gcc 4.9 RC produces incorrect flac playback code

[law at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60902

--- Comment #31 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Wed Apr 23 18:04:46 2014
New Revision: 209716

URL: http://gcc.gnu.org/viewcvs?rev=209716&root=gcc&view=rev
Log:
    PR tree-optimization/60902
    * tree-ssa-threadedge.c
    (record_temporary_equivalences_from_stmts_at_dest): Make sure to
    invalidate outputs from statements that do not produce useful
    outputs for threading.

    PR tree-optimization/60902
    * gcc.target/i386/pr60902.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr60902.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-threadedge.c