gcc/testsuite/gcc.dg/20020206-1.c

   1 /* This code is from the beginning of combine_reloads in reload.c in
   2    GCC 3.1-20020117, with simplifications.  It compiled incorrectly
   3    for -O2 -fprefetch-loop-arrays for ix86 targets.  */
   4
   5 /* { dg-do run } */
   6 /* { dg-options "-O2 -fprefetch-loop-arrays" } */
   7 /* { dg-options "-O2 -fprefetch-loop-arrays -mtune=pentium3" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
   8 /* { dg-prune-output  ".-fprefetch-loop-arrays. not supported for this target" } */
   9
  10
  11 struct reload
  12 {
  13   int first_member;
  14   int out;
  15   int final_member;
  16 };
  17
  18 int n_reloads;
  19 struct reload rld[10];
  20
  21 static int
  22 combine_reloads ()
  23 {
  24   int i;
  25   int output_reload = -1;
  26   int secondary_out = -1;
  27
  28   for (i = 0; i < n_reloads; i++)
  29     if (rld[i].out != 0)
  30       {
  31         if (output_reload >= 0)
  32           return output_reload;
  33         output_reload = i;
  34       }
  35   return output_reload;
  36 }
  37
  38 int
  39 main ()
  40 {
  41   n_reloads = 4;
  42   rld[2].out = 2;
  43   if (combine_reloads () != 2)
  44     __builtin_abort ();
  45   __builtin_exit (0);
  46 }