61 lines
2.2 KiB
C
61 lines
2.2 KiB
C
/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
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/* { dg-require-effective-target ilp32 } */
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/* { dg-skip-if "" { i?86-*-* x86_64-*-* } { "-march=*" } { "-march=athlon" } } */
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/* { dg-options "-O2 -fprefetch-loop-arrays -march=athlon -msse2 -mfpmath=sse --param simultaneous-prefetches=100 --param max-unrolled-insns=1 -fdump-tree-aprefetch-details -fdump-tree-optimized" } */
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#define K 1000000
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int a[K], b[K];
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void test(int *p)
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{
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unsigned i;
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/* Nontemporal store should be used for a. */
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for (i = 0; i < K; i++)
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a[i] = 0;
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/* Nontemporal store should be used for a, nontemporal prefetch for b. */
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for (i = 0; i < K; i++)
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a[i] = b[i];
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/* Nontemporal store should not be used here (only write and read temporal
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prefetches). */
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for (i = 0; i < K - 10000; i++)
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a[i + 10000] = a[i];
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/* Nontemporal store should not be used here (only write and read nontemporal
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prefetches). */
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for (i = 0; i < K - 100000; i++)
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a[i + 100000] = a[i];
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/* Nontemporal store should be used neither for a nor for p, as we do not know
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whether they alias or not. */
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for (i = 0; i < K; i++)
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{
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a[i] = 0;
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*p++ = 1;
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}
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/* Nontemporal store should not be used for a, as we do not know whether its
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value will be reused or not. */
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for (i = 0; i < 1000; i++)
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a[i] = 0;
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}
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/* { dg-final { scan-tree-dump-times "Issued prefetch" 5 "aprefetch" } } */
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/* { dg-final { scan-tree-dump-times "Issued nontemporal prefetch" 3 "aprefetch" } } */
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/* { dg-final { scan-tree-dump-times "nontemporal store" 2 "aprefetch" } } */
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/* { dg-final { scan-tree-dump-times "builtin_prefetch" 8 "optimized" } } */
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/* { dg-final { scan-tree-dump-times "=\\{nt\\}" 2 "optimized" } } */
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/* { dg-final { scan-tree-dump-times "__builtin_ia32_mfence" 2 "optimized" } } */
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/* { dg-final { scan-assembler-times "prefetchw" 5 } } */
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/* { dg-final { scan-assembler-times "prefetcht" 1 } } */
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/* { dg-final { scan-assembler-times "prefetchnta" 2 } } */
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/* { dg-final { scan-assembler-times "movnti" 2 } } */
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/* { dg-final { scan-assembler-times "mfence" 2 } } */
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/* { dg-final { cleanup-tree-dump "aprefetch" } } */
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/* { dg-final { cleanup-tree-dump "optimized" } } */
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