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/* { dg-do compile } */
/* { dg-options "-O3 -fdump-tree-local-pure-const1 -fdump-tree-optimized" } */
static __attribute__ ((noinline, noclone))
int i_am_pure(char *c, int n)
{
char *d=__builtin_alloca (n);
int i;
int sum;
for (i=0;i<n;i++)
d[i] = c[i];
for (i=0;i<n;i++)
d[i] *= c[n-i];
for (i=0;i<n;i++)
sum+=d[i];
if (sum)
__builtin_unreachable ();
return sum;
}
char array[11];
int
main(void)
{
i_am_pure (array,5);
i_am_pure (array,11);
return 0;
}
/* { dg-final { scan-tree-dump "found to be pure: i_am_pure" "local-pure-const1"} } */
/* { dg-final { scan-tree-dump-not "i_am_pure" "optimized"} } */
/* { dg-final { cleanup-tree-dump "local-pure-const1" } } */
/* { dg-final { cleanup-tree-dump "optimized" } } */
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