main/gcc/testsuite/gcc.dg/hoist-register-pressure-2.c

   1 /* { dg-options "-Os -fdump-rtl-hoist" }  */
   2 /* { dg-final { scan-rtl-dump "PRE/HOIST: end of bb .* copying expression" "hoist" } } */
   3 /* { dg-final { cleanup-rtl-dump "hoist" } } */
   4
   5 #define BUF 100
   6 int a[BUF];
   7
   8 void com (int);
   9 void bar (int);
  10
  11 int foo (int x, int y, int z)
  12 {
  13   /* "x+y" won't be hoisted if "-fira-hoist-pressure" is disabled,
  14      because its rtx_cost is too small.  */
  15   if (z)
  16     {
  17       a[1] = a[0];
  18       a[2] = a[1];
  19       a[3] = a[3];
  20       a[4] = a[5];
  21       a[5] = a[7];
  22       a[6] = a[11];
  23       a[7] = a[13];
  24       a[8] = a[17];
  25       com (x+y);
  26     }
  27   else
  28     {
  29       bar (x+y);
  30     }
  31
  32   return 0;
  33 }