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 -w" } */
   7 /* { dg-options "-O2 -fprefetch-loop-arrays -mtune=pentium3 -w" { target i?86-*-* } } */
   8
   9 struct reload
  10 {
  11   int first_member;
  12   int out;
  13   int final_member;
  14 };
  15
  16 int n_reloads;
  17 struct reload rld[10];
  18
  19 static int
  20 combine_reloads ()
  21 {
  22   int i;
  23   int output_reload = -1;
  24   int secondary_out = -1;
  25
  26   for (i = 0; i < n_reloads; i++)
  27     if (rld[i].out != 0)
  28       {
  29         if (output_reload >= 0)
  30           return output_reload;
  31         output_reload = i;
  32       }
  33   return output_reload;
  34 }
  35
  36 int
  37 main ()
  38 {
  39   n_reloads = 4;
  40   rld[2].out = 2;
  41   if (combine_reloads () != 2)
  42     abort ();
  43   exit (0);
  44 }