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[Bug tree-optimization/31885] Not removing empty loop, scev not finding the correct result
- 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: 10 May 2007 21:33:27 -0000
- Subject: [Bug tree-optimization/31885] Not removing empty loop, scev not finding the correct result
- References: <bug-31885-6528@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from rakdver at gcc dot gnu dot org 2007-05-10 22:33 -------
Subject: Bug 31885
Author: rakdver
Date: Thu May 10 21:33:11 2007
New Revision: 124602
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=124602
Log:
PR tree-optimization/31885
* tree-chrec.c (chrec_contains_undetermined): Do not consider NULL_TREE
to be undetermined.
(automatically_generated_chrec_p): Return false for NULL.
* gcc.dg/tree-ssa/loop-29.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/loop-29.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-chrec.c
trunk/gcc/tree-chrec.h
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31885