r179556 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Wed Oct  5 14:35:15 2011
New Revision: 179556

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=179556
Log:
2011-10-05  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/38885
	* tree-ssa-sccvn.c (vn_reference_lookup_3): Handle partial reads
	from constants.

	* gcc.dg/tree-ssa/ssa-fre-33.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-33.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c