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| author | Bin Cheng <bin.cheng@arm.com> | 2016-03-23 15:24:20 +0000 |
|---|---|---|
| committer | Bin Cheng <amker@gcc.gnu.org> | 2016-03-23 15:24:20 +0000 |
| commit | cfe8aebe85cbe6133dd65a31ea9b533a247027d1 (patch) | |
| tree | a4e24ee53b5daf4b5e8003fcab8eafd02682d5bc | |
| parent | b6d1f2b546079eb367b497228ca54d97dddc8921 (diff) | |
| download | gcc-cfe8aebe85cbe6133dd65a31ea9b533a247027d1.zip gcc-cfe8aebe85cbe6133dd65a31ea9b533a247027d1.tar.gz gcc-cfe8aebe85cbe6133dd65a31ea9b533a247027d1.tar.bz2 | |
re PR tree-optimization/69042 (Missed optimization in ivopts)
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
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/tree-ssa-loop-ivopts.c | 10 |
2 files changed, 12 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6538ff0..e035f1b 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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 diff --git a/gcc/tree-ssa-loop-ivopts.c b/gcc/tree-ssa-loop-ivopts.c index 5302edf..99dd4d0 100644 --- a/gcc/tree-ssa-loop-ivopts.c +++ b/gcc/tree-ssa-loop-ivopts.c @@ -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. */ |