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[Bug middle-end/28651] [4.0/4.1 Regression] signed compare incorrectly false for (int)(U+4)<(int)U where U is unsigned INT_MAX (for optimized x86)
- 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 Aug 2006 07:44:56 -0000
- Subject: [Bug middle-end/28651] [4.0/4.1 Regression] signed compare incorrectly false for (int)(U+4)<(int)U where U is unsigned INT_MAX (for optimized x86)
- References: <bug-28651-4912@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #11 from rguenth at gcc dot gnu dot org 2006-08-11 07:44 -------
Subject: Bug 28651
Author: rguenth
Date: Fri Aug 11 07:44:45 2006
New Revision: 116079
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=116079
Log:
2006-08-11 Richard Guenther <rguenther@suse.de>
PR middle-end/28651
* simplify-rtx.c (simplify_const_relational_operation):
Simplify A CMP B to A - B CMP 0 only for EQ and NE comparison
codes.
* gcc.c-torture/execute/pr28651.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.c-torture/execute/pr28651.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/simplify-rtx.c
trunk/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28651