gcc/testsuite/gcc.c-torture/execute/20071108-1.c

   1 /* PR tree-optimization/32575 */
   2
   3 extern void abort (void);
   4
   5 struct S
   6 {
   7   void *s1, *s2;
   8   unsigned char s3, s4, s5;
   9 };
  10
  11 __attribute__ ((noinline))
  12 void *
  13 foo (void)
  14 {
  15   static struct S s;
  16   return &s;
  17 }
  18
  19 __attribute__ ((noinline))
  20 void *
  21 bar ()
  22 {
  23   return (void *) 0;
  24 }
  25
  26 __attribute__ ((noinline))
  27 struct S *
  28 test (void *a, void *b)
  29 {
  30   struct S *p, q;
  31   p = foo ();
  32   if (p == 0)
  33     {
  34       p = &q;
  35       __builtin_memset (p, 0, sizeof (*p));
  36     }
  37   p->s1 = a;
  38   p->s2 = b;
  39   if (p == &q)
  40     p = 0;
  41   return p;
  42 }
  43
  44 int
  45 main (void)
  46 {
  47   int a;
  48   int b;
  49   struct S *z = test ((void *) &a, (void *) &b);
  50   if (z == 0 || z->s1 != (void *) &a || z->s2 != (void *) &b || z->s3 || z->s4)
  51     abort ();
  52   return 0;
  53 }