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48df3fa66c
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.
From-SVN: r174265
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