34 lines
794 B
C
34 lines
794 B
C
/* { dg-do run } */
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/* { dg-options "-O2 -ftree-pre -fno-tree-loop-im -fgcse-sm -fdump-rtl-store_motion" } */
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/* tree-pre moves the *sum load out of the loop. ftree-loop-im moves the *sum
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store out of the loop, so we disable it, to allow fgcse-sm to do it
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instead. */
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#include <stdlib.h>
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void __attribute__((noinline))
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f (unsigned int *__restrict__ a, unsigned int *__restrict__ sum, unsigned int n)
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{
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unsigned int i;
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for (i = 0; i < n; ++i)
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*sum += a[i];
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}
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int
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main ()
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{
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unsigned int a[] = { 1, 10, 100 };
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unsigned sum = 1000;
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f (a, &sum, 3);
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if (sum != 1111)
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abort ();
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return 0;
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}
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/* Check that -fgcse-sm did something for f. */
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/* { dg-final { scan-rtl-dump "STORE_MOTION of f, .* basic blocks, 1 insns deleted, 1 insns created" "store_motion" } } */
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