r125320 - in /branches/gcc-4_2-branch/gcc: Chan...

[ian@gcc.gnu.org]

Author: ian
Date: Mon Jun  4 21:58:42 2007
New Revision: 125320

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=125320
Log:
./:
	* tree-vrp.c (adjust_range_with_scev): When loop is not expected
	to overflow, reduce overflow infinity to regular infinity.
	(vrp_var_may_overflow): New static function.
	(vrp_visit_phi_node): Check vrp_var_may_overflow.
testsuite/:
	* gcc.dg/Wstrict-overflow-18.c: New test.

Added:
    branches/gcc-4_2-branch/gcc/testsuite/gcc.dg/Wstrict-overflow-18.c
Modified:
    branches/gcc-4_2-branch/gcc/ChangeLog
    branches/gcc-4_2-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_2-branch/gcc/tree-vrp.c