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r174265 - in /trunk/gcc: ChangeLog testsuite/Ch...
- From: irar at gcc dot gnu dot org
- To: gcc-cvs at gcc dot gnu dot org
- Date: Thu, 26 May 2011 07:50:10 -0000
- Subject: r174265 - in /trunk/gcc: ChangeLog testsuite/Ch...
Author: irar
Date: Thu May 26 07:50:09 2011
New Revision: 174265
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=174265
Log:
PR tree-optimization/49038
* tree-vect-loop-manip.c (vect_generate_tmps_on_preheader):
Ensure at least one epilogue iteration if required by data
accesses with gaps.
* tree-vectorizer.h (struct _loop_vec_info): Add new field
to mark loops that require peeling for gaps.
* tree-vect-loop.c (new_loop_vec_info): Initialize new field.
(vect_get_known_peeling_cost): Take peeling for gaps into
account.
(vect_transform_loop): Generate epilogue if required by data
access with gaps.
* tree-vect-data-refs.c (vect_analyze_group_access): Mark the
loop as requiring an epilogue if there are gaps in the end of
the strided group.
Added:
trunk/gcc/testsuite/gcc.dg/vect/pr49038.c
trunk/gcc/testsuite/gcc.dg/vect/vect-strided-u8-i8-gap4-unknown.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-vect-data-refs.c
trunk/gcc/tree-vect-loop-manip.c
trunk/gcc/tree-vect-loop.c
trunk/gcc/tree-vectorizer.h