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[Bug tree-optimization/34683] [4.3 Regression] SSA rewriting in the loop unroller causes quadratic behavior
- 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: 10 Jan 2008 16:59:50 -0000
- Subject: [Bug tree-optimization/34683] [4.3 Regression] SSA rewriting in the loop unroller causes quadratic behavior
- References: <bug-34683-14773@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #41 from rguenth at gcc dot gnu dot org 2008-01-10 16:59 -------
Subject: Bug 34683
Author: rguenth
Date: Thu Jan 10 16:59:06 2008
New Revision: 131446
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=131446
Log:
2008-01-10 Richard Guenther <rguenther@suse.de>
PR middle-end/34683
* tree-cfg.c (tree_merge_blocks): Do not go through the
full-blown folding and stmt updating path if we just deal
with virtual operands.
* tree-ssa-copy.c (may_propagate_copy): Do not short-cut
test for abnormal SSA_NAMEs.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/tree-cfg.c
trunk/gcc/tree-ssa-copy.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34683