gcc/testsuite/gcc.dg/tree-ssa/ssa-sink-5.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Os -fdump-tree-sink-stats" } */
   3
   4 typedef short int16_t;
   5 typedef unsigned char uint8_t;
   6
   7 void foo(int16_t runs[], uint8_t alpha[], int x, int count)
   8 {
   9     int16_t* next_runs = runs + x;
  10     uint8_t*  next_alpha = alpha + x;
  11
  12     while (x > 0)
  13     {
  14         int n = runs[0];
  15
  16         if (x < n)
  17         {
  18             alpha[x] = alpha[0];
  19             runs[0] = (int16_t)(x);
  20             runs[x] = (int16_t)(n - x);
  21             break;
  22         }
  23         runs += n;
  24         alpha += n;
  25         x -= n;
  26     }
  27
  28     runs = next_runs;
  29     alpha = next_alpha;
  30     x = count;
  31
  32    for (;;)
  33     {
  34         int n = runs[0];
  35
  36         if (x < n)
  37         {
  38             alpha[x] = alpha[0];
  39             break;
  40         }
  41         x -= n;
  42         runs += n;
  43    }
  44 }
  45
  46 /* We should not sink the next_runs = runs + x calculation after the loop.  */
  47 /* { dg-final { scan-tree-dump-times "Sunk statements:" 0 "sink" } } */