gcc/testsuite/gcc.dg/torture/stackalign/alloca-4.c

   1 /* PR middle-end/37009 */
   2 /* { dg-do run { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
   3 /* { dg-additional-options "-mincoming-stack-boundary=2 -mpreferred-stack-boundary=2" } */
   4
   5 #include "check.h"
   6
   7 void
   8 bar (char *p, int size)
   9 {
  10   __builtin_strncpy (p, "good", size);
  11 }
  12
  13 void
  14 __attribute__ ((noinline))
  15 foo (double x, double y ,double z ,double a, int size)
  16 {
  17   char *p = __builtin_alloca (size + 1);
  18   double i;
  19
  20   bar (p, size);
  21   if (__builtin_strncmp (p, "good", size) != 0)
  22     {
  23 #ifdef DEBUG
  24       p[size] = '\0';
  25       printf ("Failed: %s != good\n", p);
  26 #endif
  27      abort ();
  28     }
  29
  30   check (&i, __alignof__(i));
  31 }
  32
  33 int
  34 main (void)
  35 {
  36   double x =  1.0 ;
  37
  38   foo (x, x, x, x, 5);
  39
  40   return 0;
  41 }