r177597 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Tue Aug  9 14:03:10 2011
New Revision: 177597

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=177597
Log:
2011-08-09  Richard Guenther  <rguenther@suse.de>

	* tree-vrp.c (zero_nonzero_bits_from_vr): Also return precise
	information for ranges with only negative values.
	(extract_range_from_binary_expr_1): Adjust BIT_IOR_EXPR and
	BIT_AND_EXPR handling to handle ranges with negative values.

	* gcc.dg/tree-ssa/vrp57.c: Disable CCP.
	* gcc.dg/tree-ssa/vrp60.c: New testcase.
	* gcc.dg/tree-ssa/vrp61.c: Likewise.
	* gcc.dg/tree-ssa/vrp62.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp60.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp61.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp62.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp57.c
    trunk/gcc/tree-vrp.c