gcc/testsuite/gcc.dg/ipa/pr63551.c

   1 /* { dg-do run } */
   2 /* { dg-options "-Os" } */
   3 /* { dg-require-effective-target int32plus } */
   4
   5 union U
   6 {
   7   unsigned int f0;
   8   int f1;
   9 };
  10
  11 int a, d;
  12
  13 void
  14 fn1 (union U p)
  15 {
  16   if (p.f1 <= 0)
  17     if (a)
  18       d = 0;
  19 }
  20
  21 void
  22 fn2 ()
  23 {
  24   d = 0;
  25   union U b = { 4294967286U };
  26   fn1 (b);
  27 }
  28
  29 int
  30 main ()
  31 {
  32   fn2 ();
  33   return 0;
  34 }