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r122821 - in /trunk/gcc: ChangeLog testsuite/Ch...
- From: rguenth at gcc dot gnu dot org
- To: gcc-cvs at gcc dot gnu dot org
- Date: Sun, 11 Mar 2007 16:08:37 -0000
- Subject: r122821 - in /trunk/gcc: ChangeLog testsuite/Ch...
Author: rguenth
Date: Sun Mar 11 16:08:35 2007
New Revision: 122821
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=122821
Log:
2007-03-11 Richard Guenther <rguenther@suse.de>
PR tree-optimization/31115
* tree-vrp.c (extract_range_from_binary_expr): Make sure
the shift count is positive and non-anti-range for RSHIFT_EXPR.
A shift count of zero is not special as with *_DIV_EXPR.
(vrp_int_const_binop): Handle RSHIFT_EXPR for determining overflow
direction.
* gcc.dg/torture/pr31115.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr31115.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vrp.c