58 lines
1007 B
C
58 lines
1007 B
C
/* { dg-do compile } */
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/* { dg-options "-O2 -ftree-parallelize-loops=4 -fdump-tree-parloops-details -fdump-tree-optimized" } */
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#include <stdarg.h>
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#include <stdlib.h>
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#define N 1600
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unsigned int ub[N];
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unsigned int uc[N];
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/* Reduction of unsigned-int. */
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__attribute__ ((noinline))
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int main1 (int n, int res)
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{
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int i;
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unsigned int udiff;
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udiff = 0;
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for (i = 0; i < n; i++) {
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udiff += (ub[i] - uc[i]);
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}
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/* check results: */
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if (udiff != res)
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abort ();
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return 0;
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}
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__attribute__((noinline))
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void init_arrays ()
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{
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int i;
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for (i=0; i<N; i++)
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{
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ub[i] = i * 3;
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uc[i] = i;
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}
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}
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int main (void)
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{
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init_arrays ();
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main1 (N, 2558400);
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main1 (N-1, 2555202);
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return 0;
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}
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/* { dg-final { scan-tree-dump-times "Detected reduction" 1 "parloops" } } */
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/* { dg-final { scan-tree-dump-times "SUCCESS: may be parallelized" 2 "parloops" } } */
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/* { dg-final { cleanup-tree-dump "parloops" } } */
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/* { dg-final { cleanup-tree-dump "optimized" } } */
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