[Bug tree-optimization/64728] [5 Regression] internal compiler error: SSA corruption

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64728

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jan 22 16:07:36 2015
New Revision: 220003

URL: https://gcc.gnu.org/viewcvs?rev=220003&root=gcc&view=rev
Log:
2015-01-22  Richard Biener  <rguenther@suse.de>

    PR middle-end/64728
    * tree-ssa-coalesce.c (coalesce_partitions): Do not perform
    abnormal coalescing on undefined SSA names.

    * gcc.dg/torture/pr64728.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr64728.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-coalesce.c