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[Bug middle-end/45720] [4.6 regression] Revision 164367 miscompiled SPEC CPU 2K
- 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: Fri, 22 Oct 2010 14:44:54 +0000
- Subject: [Bug middle-end/45720] [4.6 regression] Revision 164367 miscompiled SPEC CPU 2K
- Auto-submitted: auto-generated
- References: <bug-45720-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45720
--- Comment #12 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-10-22 14:44:53 UTC ---
Author: rguenth
Date: Fri Oct 22 14:44:48 2010
New Revision: 165832
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=165832
Log:
2010-10-22 Richard Guenther <rguenther@suse.de>
PR tree-optimization/45720
* tree-vect-data-refs.c (vect_update_misalignment_for_peel):
Handle negative step.
(vect_enhance_data_refs_alignment): Likewise.
* tree-vect-loop-manip.c (vect_gen_niters_for_prolog_loop): Likewise.
(vect_create_cond_for_align_checks): Likewise.
(vect_create_cond_for_alias_checks): Likewise.
* gcc.dg/torture/pr45720.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/torture/pr45720.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-data-refs.c
trunk/gcc/tree-vect-loop-manip.c