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[Bug tree-optimization/25985] [4.2 Regression] with optimization integer math fails
- From: "rakdver at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 29 Mar 2006 01:41:30 -0000
- Subject: [Bug tree-optimization/25985] [4.2 Regression] with optimization integer math fails
- References: <bug-25985-9034@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #8 from rakdver at gcc dot gnu dot org 2006-03-29 01:41 -------
Subject: Bug 25985
Author: rakdver
Date: Wed Mar 29 01:41:27 2006
New Revision: 112484
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=112484
Log:
PR tree-optimization/25985
* tree-ssa-loop-niter.c (number_of_iterations_le,
number_of_iterations_ne): Make comments more precise.
(number_of_iterations_cond): Add only_exit argument. Use the
fact that signed variables do not overflow only when only_exit
is true.
(loop_only_exit_p): New.
(number_of_iterations_exit): Pass result of loop_only_exit_p to
number_of_iterations_cond.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-ssa-loop-niter.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25985