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[Bug middle-end/31115] [4.3 regression] libstdc++ 22_locale/num_get/get/char/2.cc 27_io/basic_ostream/inserters_arithmetic/char/6.cc
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 11 Mar 2007 16:08:51 -0000
- Subject: [Bug middle-end/31115] [4.3 regression] libstdc++ 22_locale/num_get/get/char/2.cc 27_io/basic_ostream/inserters_arithmetic/char/6.cc
- References: <bug-31115-507@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #13 from rguenth at gcc dot gnu dot org 2007-03-11 16:08 -------
Subject: Bug 31115
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
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31115