1 /* { dg-do compile } */
3 /* { dg-options "-O2 -fpredictive-commoning -fdump-tree-pcom-details" } */
9 __attribute__ ((noinline))
16 for (i = 2; i < 1000; i++)
17 fib[i] = (fib[i-1] + fib[i - 2]) & 0xffff;
22 __attribute__ ((noinline))
23 void count_averages(int n)
27 for (i = 1; i < n; i++)
28 avg[i] = (((unsigned long) fib[i - 1] + fib[i] + fib[i + 1]) / 3) & 0xffff;
36 if (fib[19] != 4181 || avg[19] != 4510)
39 if (fib[999] != 162 || avg[998] != 21953)
45 /* Verify that both loops were transformed and unrolled. */
46 /* { dg-final { scan-tree-dump-times "Unrolling 2 times." 2 "pcom"} } */
48 /* Also check that we undid the transformation previously made by PRE. */
49 /* { dg-final { scan-tree-dump-times "looparound ref" 1 "pcom"} } */
51 /* { dg-final { cleanup-tree-dump "pcom" } } */