gcc/testsuite/gcc.target/arm/20051215-1.c

   1 /* ARM's load-and-call patterns used to allow automodified addresses.
   2    This was wrong, because if the modified register were spilled,
   3    the call would need an output reload.  */
   4 /* { dg-do run } */
   5 /* { dg-options "-O2 -fno-omit-frame-pointer" } */
   6 extern void abort (void);
   7 typedef void (*callback) (void);
   8
   9 static void
  10 foo (callback *first, callback *p)
  11 {
  12   while (p > first)
  13     {
  14       (*--p) ();
  15 #ifndef __thumb__
  16       asm ("" : "=r" (p) : "0" (p)
  17            : "r4", "r5", "r6", "r7", "r8", "r9", "r10");
  18 #endif
  19     }
  20 }
  21
  22 static void
  23 dummy (void)
  24 {
  25   static int count;
  26   if (count++ == 1)
  27     abort ();
  28 }
  29
  30 int
  31 main (void)
  32 {
  33   callback list[1] = { dummy };
  34   foo (&list[0], &list[1]);
  35   return 0;
  36 }