diff options
| author | Richard Biener <rguenther@suse.de> | 2016-07-05 13:25:19 +0000 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2016-07-05 13:25:19 +0000 |
| commit | 16bba9b5d33a8b3c1240ff964eae9490615078e1 (patch) | |
| tree | 242051bb452019038de6eb83b463e6dd9598172d | |
| parent | b88aa7dccc9a646459b1563972ffb0b6327b506b (diff) | |
2016-07-05 Richard Biener <rguenther@suse.de>
* tree-loop-distribution.c (distribute_loop): Fix issue with
the cost model loop.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@238004 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/tree-loop-distribution.c | 8 |
2 files changed, 13 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 93022ad89cb..ff4534683c3 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2016-07-05 Richard Biener <rguenther@suse.de> + + * tree-loop-distribution.c (distribute_loop): Fix issue with + the cost model loop. + 2016-07-05 Christophe Lyon <christophe.lyon@linaro.org> * config/arm/neon-testgen.ml: Delete. diff --git a/gcc/tree-loop-distribution.c b/gcc/tree-loop-distribution.c index e4163b274ff..9bca56a9b6f 100644 --- a/gcc/tree-loop-distribution.c +++ b/gcc/tree-loop-distribution.c @@ -1504,6 +1504,7 @@ distribute_loop (struct loop *loop, vec<gimple *> stmts, memory accesses. */ for (i = 0; partitions.iterate (i, &into); ++i) { + bool changed = false; if (partition_builtin_p (into)) continue; for (int j = i + 1; @@ -1524,8 +1525,15 @@ distribute_loop (struct loop *loop, vec<gimple *> stmts, partitions.unordered_remove (j); partition_free (partition); j--; + changed = true; } } + /* If we fused 0 1 2 in step 1 to 0,2 1 as 0 and 2 have similar + accesses when 1 and 2 have similar accesses but not 0 and 1 + then in the next iteration we will fail to consider merging + 1 into 0,2. So try again if we did any merging into 0. */ + if (changed) + i--; } /* Build the partition dependency graph. */ |