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[Bug tree-optimization/28868] [4.3/4.4/4.5 Regression] Not eliminating the PHIs which have the same arguments
- 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: 6 Apr 2009 14:55:48 -0000
- Subject: [Bug tree-optimization/28868] [4.3/4.4/4.5 Regression] Not eliminating the PHIs which have the same arguments
- References: <bug-28868-6528@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #19 from rguenth at gcc dot gnu dot org 2009-04-06 14:55 -------
Subject: Bug 28868
Author: rguenth
Date: Mon Apr 6 14:55:31 2009
New Revision: 145607
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=145607
Log:
2009-04-06 Richard Guenther <rguenther@suse.de>
PR tree-optimization/28868
* tree-ssa-pre.c (inserted_phi_names): New bitmap to keep track
of which PHI results we inserted.
(insert_into_preds_of_block): Record inserted PHIs.
(eliminate): Eliminate redundant PHI nodes.
(init_pre): Init inserted_phi_names.
* gcc.dg/tree-ssa/ssa-fre-21.c: New testcase.
* gcc.dg/tree-ssa/ssa-sccvn-1.c: Adjust.
* gcc.dg/tree-ssa/ssa-sccvn-2.c: Likewise.
* gcc.dg/tree-ssa/ssa-sccvn-4.c: Likewise.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-23.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-sccvn-1.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-sccvn-2.c
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-sccvn-4.c
trunk/gcc/tree-ssa-pre.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28868