gcc/testsuite/gcc.target/i386/sibcall-5.c

   1 /* Check that indirect sibcalls understand regparm.  */
   2 /* { dg-do run { target ia32 } } */
   3 /* { dg-options "-O2" } */
   4
   5 extern void abort (void);
   6
   7 int (*f)(int, int) __attribute__((regparm(2)));
   8 int (*g)(int, int, int) __attribute__((regparm(3)));
   9
  10 int __attribute__((noinline))
  11 foo(void)
  12 {
  13   return f(1, 2);
  14 }
  15
  16 int __attribute__((noinline))
  17 bar(void)
  18 {
  19   return g(1, 2, 3);
  20 }
  21
  22 int __attribute__((regparm(2)))
  23 f1(int x, int y)
  24 {
  25   return x*3 + y;
  26 }
  27
  28 int __attribute__((regparm(3)))
  29 g1(int x, int y, int z)
  30 {
  31   return x*9 + y*3 + z;
  32 }
  33
  34 int main()
  35 {
  36   f = f1;
  37   g = g1;
  38   if (foo() != 1*3 + 2)
  39     abort ();
  40   if (bar() != 1*9 + 2*3 + 3)
  41     abort ();
  42   return 0;
  43 }