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tree-loop-distribution.c (distribute_loop): Fix issue with the cost model loop.

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2016-07-05  Richard Biener  <rguenther@suse.de>

	* tree-loop-distribution.c (distribute_loop): Fix issue with
	the cost model loop.

From-SVN: r238004
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Richard Biener 2016-07-05 13:25:19 +00:00 committed by Richard Biener
parent b758f6e25b
commit 16eba42015
2 changed files with 13 additions and 0 deletions
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5
gcc/ChangeLog
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@ -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.

8
gcc/tree-loop-distribution.c
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@ -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. */