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tree-vect-loop.c (vect_transform_loop): Fix epilogue iterations for epilogue vectorization.

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2018-12-04  Richard Biener  <rguenther@suse.de>

	* tree-vect-loop.c (vect_transform_loop): Fix epilogue iterations
	for epilogue vectorization.

From-SVN: r266777
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Richard Biener 2018-12-04 13:23:13 +00:00 committed by Richard Biener
parent 0f7bbec729
commit fa29266c1d
2 changed files with 8 additions and 3 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2018-12-04 Richard Biener <rguenther@suse.de>
* tree-vect-loop.c (vect_transform_loop): Fix epilogue iterations
for epilogue vectorization.
2018-12-04 Richard Biener <rguenther@suse.de>
PR tree-optimization/88301

6
gcc/tree-vect-loop.c
View File

@ -8501,13 +8501,13 @@ vect_transform_loop (loop_vec_info loop_vinfo)
targetm.vectorize.autovectorize_vector_sizes (&vector_sizes);
unsigned int next_size = 0;
/* Note LOOP_VINFO_NITERS_KNOWN_P and LOOP_VINFO_INT_NITERS work
on niters already ajusted for the iterations of the prologue. */
if (LOOP_VINFO_NITERS_KNOWN_P (loop_vinfo)
&& LOOP_VINFO_PEELING_FOR_ALIGNMENT (loop_vinfo) >= 0
&& known_eq (vf, lowest_vf))
{
unsigned int eiters
unsigned HOST_WIDE_INT eiters
= (LOOP_VINFO_INT_NITERS (loop_vinfo)
- LOOP_VINFO_PEELING_FOR_ALIGNMENT (loop_vinfo)
- LOOP_VINFO_PEELING_FOR_GAPS (loop_vinfo));
eiters
= eiters % lowest_vf + LOOP_VINFO_PEELING_FOR_GAPS (loop_vinfo);