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Re: [PATCH, vec-tails 03/10] Support epilogues vectorization with no masking

On 06/24/2016 01:40 AM, Ilya Enkovich wrote:

Here is an updated version with disabled alias checks for loop epilogues.
Instead of calling vect_analyze_data_ref_dependence I just use VF of the
original loop as MAX_VF for epilogue.


2016-05-24  Ilya Enkovich  <>

	* tree-if-conv.c (tree_if_conversion): Make public.
	* tree-if-conv.h: New file.
	* tree-vect-data-refs.c (vect_analyze_data_ref_dependences) Avoid
	dynamic alias checks for epilogues.
	(vect_enhance_data_refs_alignment): Don't try to enhance alignment
	for epilogues.
	* tree-vect-loop-manip.c (vect_do_peeling_for_loop_bound): Return
	created loop.
	* tree-vect-loop.c: include tree-if-conv.h.
	(destroy_loop_vec_info): Preserve LOOP_VINFO_ORIG_LOOP_INFO in
	(vect_analyze_loop_form): Init LOOP_VINFO_ORIG_LOOP_INFO and reset
	(vect_analyze_loop): Reset loop->aux.
	(vect_transform_loop): Check if created epilogue should be returned
	for further vectorization.  If-convert epilogue if required.
	* tree-vectorizer.c (vectorize_loops): Add a queue of loops to
	process and insert vectorized loop epilogues into this queue.
	* tree-vectorizer.h (vect_do_peeling_for_loop_bound): Return created
	(vect_transform_loop): Return created loop.
I know Richi wasn't all that happy with the call into if-conversion and I don't particularly like the use of aux for smuggling data around. But I think those are warts, not fundamental design flaws.

OK once the rest of the bits are approved.


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