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

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