Viewing file:  predcom-dse-12.c (1.57 KB) -rw-r--r--
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/* { dg-do run } */
/* { dg-options "-O2 -fno-inline -fpredictive-commoning -fdump-tree-pcom-details" } */
int arr[105] = {2, 3, 5, 7, 11};
int result0[10] = {2, 3, 5, 7, 11};
int result1[10] = {0, -1, 5, -2, 11, 0};
int result2[10] = {0, 0, -1, -2, -2, 0};
int result3[10] = {0, 0, 0, -1, -2, -2, 0};
int result4[10] = {0, 0, 0, 0, -1, -2, -2, 0};
int result100[105] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, -2, -2, 0};
extern void abort (void);
int sum;
void __attribute__((noinline)) foo (int * restrict a, int len, int t1, int t2)
{
int i;
for (i = 0; i < len; i++)
{
a[i] = t1;
a[i + 3] = t2;
a[i + 1] = -1;
sum = sum + a[i] + a[i + 3];
}
}
void check (int *a, int *res, int len, int sval)
{
int i;
if (sum != sval)
abort ();
for (i = 0; i < len; i++)
if (a[i] != res[i])
abort ();
}
int main (void)
{
foo (arr, 0, 0, -2);
check (arr, result0, 10, 0);
foo (arr, 1, 0, -2);
check (arr, result1, 10, -2);
foo (arr, 2, 0, -2);
check (arr, result2, 10, -6);
foo (arr, 3, 0, -2);
check (arr, result3, 10, -12);
foo (arr, 4, 0, -2);
check (arr, result4, 10, -20);
foo (arr, 100, 0, -2);
check (arr, result100, 105, -220);
return 0;
}
/* { dg-final { scan-tree-dump "Store-stores chain" "pcom"} } */
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