gcc/testsuite/gcc.dg/split-6.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target split_stack } */
   3 /* { dg-options "-fsplit-stack" } */
   4
   5 /* This test is like split-3.c, but tests with a smaller stack frame,
   6    since that uses a different prologue.  */
   7
   8 #include <stdarg.h>
   9 #include <stdlib.h>
  10
  11 /* Use a noinline function to ensure that the buffer is not removed
  12    from the stack.  */
  13 static void use_buffer (char *buf) __attribute__ ((noinline));
  14 static void
  15 use_buffer (char *buf)
  16 {
  17   buf[0] = '\0';
  18 }
  19
  20 /* When using gold, the call to abort will force a stack split.  */
  21
  22 static void
  23 down (int i, ...)
  24 {
  25   char buf[1];
  26   va_list ap;
  27
  28   va_start (ap, i);
  29   if (va_arg (ap, int) != 1
  30       || va_arg (ap, int) != 2
  31       || va_arg (ap, int) != 3
  32       || va_arg (ap, int) != 4
  33       || va_arg (ap, int) != 5
  34       || va_arg (ap, int) != 6
  35       || va_arg (ap, int) != 7
  36       || va_arg (ap, int) != 8
  37       || va_arg (ap, int) != 9
  38       || va_arg (ap, int) != 10)
  39     abort ();
  40
  41   if (i > 0)
  42     {
  43       use_buffer (buf);
  44       down (i - 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
  45     }
  46 }
  47
  48 int
  49 main (void)
  50 {
  51   down (1000, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
  52   return 0;
  53 }