gcc-4.9/gcc/testsuite/gcc.target/alpha/pr22093.c


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/* { dg-do compile } */
/* { dg-options "-O2" } */

struct shared_ptr_struct
{
  unsigned long phase : 48;
  unsigned thread : 16;
  void *addr;
} x;

void foo (void)
{
   x.thread = 2;
}