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[Bug tree-optimization/23821] [4.3/4.4/4.5 Regression] DOM and VRP creating harder to optimize code
- 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: 5 Oct 2009 13:18:26 -0000
- Subject: [Bug tree-optimization/23821] [4.3/4.4/4.5 Regression] DOM and VRP creating harder to optimize code
- References: <bug-23821-5077@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #30 from rguenth at gcc dot gnu dot org 2009-10-05 13:18 -------
Subject: Bug 23821
Author: rguenth
Date: Mon Oct 5 13:18:09 2009
New Revision: 152449
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=152449
Log:
2009-10-05 Richard Guenther <rguenther@suse.de>
PR tree-optimization/23821
* tree-vrp.c (vrp_finalize): Do not perform copy propagation.
* tree-ssa-dom.c (cprop_operand): Do not propagate copies into
simple IV increments.
* gcc.dg/torture/pr23821.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr23821.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-dom.c
trunk/gcc/tree-vrp.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23821