gcc/testsuite/gcc.dg/torture/pr51528.c

   1 /* { dg-do run } */
   2 /* { dg-options "-fno-early-inlining" } */
   3
   4 extern void abort (void);
   5
   6 union U
   7 {
   8   int i;
   9   _Bool b;
  10 };
  11
  12 _Bool gb;
  13
  14 void  __attribute__ ((noinline))
  15 use_bool (union U u)
  16 {
  17   gb = u.b;
  18 }
  19
  20 union U
  21 bar (void)
  22 {
  23   union U u;
  24   u.i = 0xFFFE;
  25   return u;
  26 }
  27
  28 union U  __attribute__ ((noinline))
  29 foo (void)
  30 {
  31   union U u,v;
  32
  33   u.b = 1;
  34   use_bool (u);
  35   u = bar ();
  36
  37   return u;
  38 }
  39
  40 int main (int argc, char **argv)
  41 {
  42   union U u = foo ();
  43   if (u.i != 0xFFFE)
  44     abort ();
  45   return 0;
  46 }