gcc/testsuite/gcc.dg/tree-ssa/slsr-39.c

   1 /* Verify straight-line strength reduction for back-tracing
   2    CAND_ADD for T2 in:
   3
   4     *PBASE:    T1
   5     *POFFSET:  MULT_EXPR (T2, C3)
   6     *PINDEX:   C1 + (C2 * C3) + C4  */
   7
   8 /* { dg-do compile } */
   9 /* { dg-options "-O2 -fdump-tree-slsr-details" } */
  10
  11 typedef int arr_2[50][50];
  12
  13 void foo (arr_2 a2, int v1)
  14 {
  15   int i, j;
  16
  17   i = v1 + 5;
  18   j = i;
  19   a2 [i] [j++] = i;
  20   a2 [i] [j++] = i;
  21   a2 [i] [i-1] += 1;
  22   return;
  23 }
  24
  25 /* { dg-final { scan-tree-dump-times "Replacing reference: " 4 "slsr" } } */