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

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