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re PR tree-optimization/69042 (Missed optimization in ivopts)

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PR tree-optimization/69042
	* tree-ssa-loop-ivopts.c (add_iv_candidate_for_use): Add IV cand
	for use with constant offset stripped in base.

From-SVN: r234429
This commit is contained in:
Bin Cheng 2016-03-23 15:24:20 +00:00 committed by Bin Cheng
parent b6d1f2b546
commit cfe8aebe85
2 changed files with 12 additions and 4 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2016-03-23 Bin Cheng <bin.cheng@arm.com>
PR tree-optimization/69042
* tree-ssa-loop-ivopts.c (add_iv_candidate_for_use): Add IV cand
for use with constant offset stripped in base.
2016-03-23 Richard Biener <rguenther@suse.de>
PR middle-end/70251

10
gcc/tree-ssa-loop-ivopts.c
View File

@ -3232,11 +3232,13 @@ add_iv_candidate_for_use (struct ivopts_data *data, struct iv_use *use)
basetype = sizetype;
record_common_cand (data, build_int_cst (basetype, 0), iv->step, use);
/* Record common candidate with constant offset stripped in base. */
/* Record common candidate with constant offset stripped in base.
Like the use itself, we also add candidate directly for it. */
base = strip_offset (iv->base, &offset);
if (offset || base != iv->base)
{
base = strip_offset (iv->base, &offset);
if (offset || base != iv->base)
record_common_cand (data, base, iv->step, use);
record_common_cand (data, base, iv->step, use);
add_candidate (data, base, iv->step, false, use);
}
/* Record common candidate with base_object removed in base. */