r155360 - in /trunk/gcc: ChangeLog testsuite/Ch...

Sat Dec 19 11:24:00 GMT 2009

Author: rguenth
Date: Sat Dec 19 11:24:49 2009
New Revision: 155360

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=155360
Log:
2009-12-19  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/42108
	* tree-ssa-sccvn.c (last_vuse_ptr): New variable.
	(vn_reference_lookup_2): Update last seen VUSE.
	(vn_reference_lookup_3): Avoid updating last seen VUSE after
	translating.
	(visit_reference_op_load): Use last seen VUSE from the first
	lookup when entering into the table.

	* gfortran.dg/pr42108.f90: New testcase.

Added:
    trunk/gcc/testsuite/gfortran.dg/pr42108.f90
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-sccvn.c