1 /* { dg-do compile { target int32plus } } */
2 /* { dg-options "-O2 -ftree-loop-distribution -fdump-tree-ldist-all" } */
7 int a
[10000], b
[10000], c
[10000], d
[10000];
11 for (i
= 2; i
< (10000-1); i
++)
13 a
[i
] = k
* i
; /* S1 */
14 b
[i
] = a
[i
-2] + k
; /* S2 */
15 c
[i
] = b
[i
] + a
[i
+1]; /* S3 */
16 d
[i
] = c
[i
-1] + k
+ i
; /* S4 */
20 S1 -> S2 (flow, level 1)
21 S1 -> S3 (anti, level 1)
22 S2 -> S3 (flow, level 0)
23 S3 -> S4 (flow, level 1)
25 There are three partitions: {S1, S3}, {S2} and {S4}.
27 The cost model should fuse together all the partitions, as they
28 are reusing the same data, ending on a single partition.
30 return a
[10000-2] + b
[10000-1] + c
[10000-2] + d
[10000-2];
33 /* { dg-final { scan-tree-dump-times "distributed: split to 3 loops" 0 "ldist" } } */
34 /* { dg-final { cleanup-tree-dump "ldist" } } */