gcc/testsuite/gcc.dg/ppc-stackalign-1.c

   1 /* { dg-do run { target powerpc-*-linux* powerpc-*-sysv* } } */
   2 /* { dg-options {} } */
   3
   4 /* Test stack pointer alignment against variable alloca.  */
   5 /* Inspired by PR libgcj/10610.  */
   6 /* Origin: Franz Sirl <Franz.Sirl-kernel@lauterbach.com>.  */
   7
   8 extern void abort (void);
   9 extern void exit (int);
  10
  11 register unsigned long sp __asm__ ("r1");
  12
  13 void g (int * val __attribute__ ((unused)))
  14 {
  15   if (sp & 0xf)
  16     abort ();
  17 }
  18
  19 void f (int val)
  20 {
  21   int *val1 = __builtin_alloca (val);
  22
  23   g (val1);
  24   return;
  25 }
  26
  27 int main (void)
  28 {
  29   int i;
  30
  31   for (i = 1; i < 32; i++)
  32     f (i);
  33
  34   exit (0);
  35 }