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 /* { dg-skip-if "" { i?86-*-* } { "-m64" } { "" } } */
   9
  10 struct reload
  11 {
  12   int first_member;
  13   int out;
  14   int final_member;
  15 };
  16
  17 int n_reloads;
  18 struct reload rld[10];
  19
  20 static int
  21 combine_reloads ()
  22 {
  23   int i;
  24   int output_reload = -1;
  25   int secondary_out = -1;
  26
  27   for (i = 0; i < n_reloads; i++)
  28     if (rld[i].out != 0)
  29       {
  30         if (output_reload >= 0)
  31           return output_reload;
  32         output_reload = i;
  33       }
  34   return output_reload;
  35 }
  36
  37 int
  38 main ()
  39 {
  40   n_reloads = 4;
  41   rld[2].out = 2;
  42   if (combine_reloads () != 2)
  43     abort ();
  44   exit (0);
  45 }