gcc/testsuite/gcc.dg/pr59643.c

   1 /* PR tree-optimization/59643 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O3 -fdump-tree-pcom-details" } */
   4 /* { dg-additional-options "--param max-unrolled-insns=400" { target { powerpc*-*-* } } } */
   5 /* Implicit threashold of max-unrolled-insn on ppc at O3 is too small for the
   6    loop of this case.  */
   7
   8 void
   9 foo (double *a, double *b, double *c, double d, double e, int n)
  10 {
  11   int i;
  12   for (i = 1; i < n - 1; i++)
  13     a[i] = d * (b[i] + c[i] + a[i - 1] + a[i + 1]) + e * a[i];
  14 }
  15
  16 /* { dg-final { scan-tree-dump-times "Before commoning:" 1 "pcom" } } */
  17 /* { dg-final { scan-tree-dump-times "Unrolling 2 times" 1 "pcom" } } */