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[vect] Be consistent in versioning threshold use

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gcc/ChangeLog:
2019-10-17  Andre Vieira  <andre.simoesdiasvieira@arm.com>

	* tree-vect-loop.c (vect_analyze_loop_2): Use same condition to decide
	when to use versioning threshold.

From-SVN: r277105
This commit is contained in:
Andre Vieira 2019-10-17 12:35:33 +00:00 committed by Andre Vieira
parent 31b35fd503
commit f261d4808c
2 changed files with 14 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2019-10-17 Andre Vieira <andre.simoesdiasvieira@arm.com>
* tree-vect-loop.c (vect_analyze_loop_2): Use same condition to decide
when to use versioning threshold.
2019-10-17 Andre Vieira <andre.simoesdiasvieira@arm.com>
* tree-vect-loop.c (determine_peel_for_niter): New function contained

9
gcc/tree-vect-loop.c
View File

@ -2154,6 +2154,7 @@ start_over:
if (LOOP_REQUIRES_VERSIONING (loop_vinfo))
{
poly_uint64 niters_th = 0;
unsigned int th = LOOP_VINFO_COST_MODEL_THRESHOLD (loop_vinfo);
if (!vect_use_loop_mask_for_alignment_p (loop_vinfo))
{
@ -2174,6 +2175,14 @@ start_over:
/* One additional iteration because of peeling for gap. */
if (LOOP_VINFO_PEELING_FOR_GAPS (loop_vinfo))
niters_th += 1;
/* Use the same condition as vect_transform_loop to decide when to use
the cost to determine a versioning threshold. */
if (th >= vect_vf_for_cost (loop_vinfo)
&& !LOOP_VINFO_NITERS_KNOWN_P (loop_vinfo)
&& ordered_p (th, niters_th))
niters_th = ordered_max (poly_uint64 (th), niters_th);
LOOP_VINFO_VERSIONING_THRESHOLD (loop_vinfo) = niters_th;
}