r158728 - in /branches/gcc-4_5-branch/gcc: Chan...

[jiez@gcc.gnu.org]

Author: jiez
Date: Mon Apr 26 10:59:48 2010
New Revision: 158728

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=158728
Log:
	PR tree-optimization/43833
	* tree-vrp.c (range_int_cst_p): New.
	(range_int_cst_singleton_p): New.
	(extract_range_from_binary_expr): Optimize BIT_AND_EXPR case
	when both operands are constants.  Use range_int_cst_p in
	BIT_IOR_EXPR case.

	testsuite/
	PR tree-optimization/43833
	gcc.dg/Warray-bounds-8.c: New test case.

Added:
    branches/gcc-4_5-branch/gcc/testsuite/gcc.dg/Warray-bounds-8.c
Modified:
    branches/gcc-4_5-branch/gcc/ChangeLog
    branches/gcc-4_5-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_5-branch/gcc/tree-vrp.c