gcc/testsuite/gcc.dg/tree-ssa/predcom-dse-10.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -fno-inline -fpredictive-commoning -fdump-tree-pcom-details-blocks" } */
   3
   4 int arr[105] = {2, 3, 5, 7, 11};
   5 int result0[10] = {2, 3, 5, 7, 11};
   6 int result1[10] = {0, 3, 5, -2, 11, 0};
   7
   8 extern void abort (void);
   9
  10 void __attribute__((noinline)) foo (int *a, int len, int flag)
  11 {
  12   int i;
  13   for (i = 0; i < len; i++)
  14     {
  15       a[i] = 0;
  16       if (flag)
  17         a[i + 1] = -1;
  18       a[i + 3] = -2;
  19     }
  20 }
  21
  22 void check (int *a, int *res, int len)
  23 {
  24   int i;
  25
  26   for (i = 0; i < len; i++)
  27     if (a[i] != res[i])
  28       abort ();
  29 }
  30
  31 int main (void)
  32 {
  33   int i;
  34
  35   foo (arr, 0, 0);
  36   check (arr, result0, 10);
  37
  38   foo (arr, 1, 0);
  39   check (arr, result1, 10);
  40
  41   return 0;
  42 }
  43 /* { dg-final { scan-tree-dump-not "Store-stores chain" "pcom"} } */
  44 /* { dg-final { scan-tree-dump-not "Invalid sum" "pcom" } } */