gcc/testsuite/gcc.target/i386/pr59644.c

   1 /* PR target/59644 */
   2 /* { dg-do run { target lp64 } } */
   3 /* { dg-options "-O2 -ffreestanding -mno-sse -mpreferred-stack-boundary=3 -maccumulate-outgoing-args -mno-red-zone" } */
   4
   5 /* This test uses __builtin_trap () instead of e.g. abort,
   6    because due to -mpreferred-stack-boundary=3 it should not call
   7    any library function from within main ().  */
   8
   9 #include <stdarg.h>
  10
  11 __attribute__((noinline, noclone))
  12 int
  13 bar (int x, int y, int z, int w, const char *fmt, va_list ap)
  14 {
  15   if (x != 1 || y != 2 || z != 3 || w != 4)
  16     __builtin_trap ();
  17   if (fmt[0] != 'f' || fmt[1] != 'o' || fmt[2] != 'o' || fmt[3])
  18     __builtin_trap ();
  19   if (va_arg (ap, int) != 5 || va_arg (ap, int) != 6
  20       || va_arg (ap, long long) != 7LL)
  21     __builtin_trap ();
  22   return 9;
  23 }
  24
  25 __attribute__((noinline, noclone, optimize ("Os")))
  26 int
  27 foo (const char *fmt, ...)
  28 {
  29   va_list ap;
  30   va_start (ap, fmt);
  31   int r = bar (1, 2, 3, 4, fmt, ap);
  32   va_end (ap);
  33   return r;
  34 }
  35
  36 int
  37 main ()
  38 {
  39   if (foo ("foo", 5, 6, 7LL) != 9)
  40     __builtin_trap ();
  41   return 0;
  42 }