24 lines
588 B
C
24 lines
588 B
C
/* Prefetching used to prefer nonsensical unroll factor of 5 in this testcase. */
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/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
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/* { dg-require-effective-target ilp32 } */
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/* { dg-options "-O2 -fprefetch-loop-arrays -march=athlon -msse2 -mfpmath=sse -fdump-tree-aprefetch-details" } */
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#define N 1000000
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double a[N];
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double test(void)
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{
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unsigned i;
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double sum = 0;
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for (i = 0; i < N; i += 2)
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sum += (a[i] * a[i+1]);
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return sum;
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}
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/* { dg-final { scan-tree-dump-times "unroll factor 4" 1 "aprefetch" } } */
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/* { dg-final { cleanup-tree-dump "aprefetch" } } */
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