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re PR tree-optimization/81303 (410.bwaves regression caused by r249919)

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2016-07-21  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/81303
	* tree-vect-loop.c (vect_estimate_min_profitable_iters): Take
	into account prologue and epilogue iterations when raising
	min_profitable_iters to sth at least covering one vector iteration.

From-SVN: r250416
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Richard Biener 2017-07-21 07:13:57 +00:00 committed by Richard Biener
parent ac48cd5e89
commit 1dae21ad97
2 changed files with 10 additions and 2 deletions
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gcc/ChangeLog
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@ -1,3 +1,10 @@
2016-07-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/81303
* tree-vect-loop.c (vect_estimate_min_profitable_iters): Take
into account prologue and epilogue iterations when raising
min_profitable_iters to sth at least covering one vector iteration.
2017-07-21 Tamar Christina <tamar.christina@arm.com>
* config/arm/arm.c (arm_test_cpu_arch_dat):

5
gcc/tree-vect-loop.c
View File

@ -3702,8 +3702,9 @@ vect_estimate_min_profitable_iters (loop_vec_info loop_vinfo,
" Calculated minimum iters for profitability: %d\n",
min_profitable_iters);
min_profitable_iters =
min_profitable_iters < vf ? vf : min_profitable_iters;
/* We want the vectorized loop to execute at least once. */
if (min_profitable_iters < (vf + peel_iters_prologue + peel_iters_epilogue))
min_profitable_iters = vf + peel_iters_prologue + peel_iters_epilogue;
if (dump_enabled_p ())
dump_printf_loc (MSG_NOTE, vect_location,