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[Bug tree-optimization/38885] missed FRE with BIT_FIELD_REF and vectors
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 05 Oct 2011 14:35:22 +0000
- Subject: [Bug tree-optimization/38885] missed FRE with BIT_FIELD_REF and vectors
- Auto-submitted: auto-generated
- References: <bug-38885-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38885
--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-10-05 14:35:22 UTC ---
Author: rguenth
Date: Wed Oct 5 14:35:15 2011
New Revision: 179556
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=179556
Log:
2011-10-05 Richard Guenther <rguenther@suse.de>
PR tree-optimization/38885
* tree-ssa-sccvn.c (vn_reference_lookup_3): Handle partial reads
from constants.
* gcc.dg/tree-ssa/ssa-fre-33.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-33.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-sccvn.c