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Rev 384 |
/* { dg-do compile } */
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/* { dg-do compile } */
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/* { dg-options "-O2 -ftree-loop-distribution -fdump-tree-ldist-all" } */
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/* { dg-options "-O2 -ftree-loop-distribution -fdump-tree-ldist-all" } */
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void foo (int * __restrict__ ia,
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void foo (int * __restrict__ ia,
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int * __restrict__ ib,
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int * __restrict__ ib,
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int * __restrict__ oxa,
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int * __restrict__ oxa,
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int * __restrict__ oxb,
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int * __restrict__ oxb,
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int * __restrict__ oya,
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int * __restrict__ oya,
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int * __restrict__ oyb)
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int * __restrict__ oyb)
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{
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{
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int i;
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int i;
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long int mya[52];
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long int mya[52];
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long int myb[52];
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long int myb[52];
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for (i=0; i < 52; i++)
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for (i=0; i < 52; i++)
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{
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{
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mya[i] = ia[i] * oxa[i] + ib[i] * oxb[i];
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mya[i] = ia[i] * oxa[i] + ib[i] * oxb[i];
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myb[i] = -ia[i] * oxb[i] + ib[i] * oxa[i];
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myb[i] = -ia[i] * oxb[i] + ib[i] * oxa[i];
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oya[i] = mya[i] >> 10;
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oya[i] = mya[i] >> 10;
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oyb[i] = myb[i] >> 10;
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oyb[i] = myb[i] >> 10;
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}
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}
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/* This loop was distributed, but it is not anymore due to the cost
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/* This loop was distributed, but it is not anymore due to the cost
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model changes: the result of a distribution would look like this:
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model changes: the result of a distribution would look like this:
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| for (i=0; i < 52; i++)
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| for (i=0; i < 52; i++)
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| oya[i] = ia[i] * oxa[i] + ib[i] * oxb[i] >> 10;
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| oya[i] = ia[i] * oxa[i] + ib[i] * oxb[i] >> 10;
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| for (i=0; i < 52; i++)
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| for (i=0; i < 52; i++)
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| oyb[i] = -ia[i] * oxb[i] + ib[i] * oxa[i] >> 10;
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| oyb[i] = -ia[i] * oxb[i] + ib[i] * oxa[i] >> 10;
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and in this the array IA is read in both tasks. For maximizing
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and in this the array IA is read in both tasks. For maximizing
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the cache reuse, ldist does not distributes this loop anymore.
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the cache reuse, ldist does not distributes this loop anymore.
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*/
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*/
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}
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}
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/* { dg-final { scan-tree-dump-times "distributed: split to 2 loops" 0 "ldist" } } */
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/* { dg-final { scan-tree-dump-times "distributed: split to 2 loops" 0 "ldist" } } */
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/* { dg-final { cleanup-tree-dump "ldist" } } */
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/* { dg-final { cleanup-tree-dump "ldist" } } */
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