1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fdump-tree-pre" } */
       3  
       4  unsigned f(unsigned x, unsigned y, _Bool b)
       5  {
       6  #define m (b?-1:0)
       7    return (x&m)|(y&~m);
       8  #undef m
       9  }
      10  
      11  /* { dg-final { scan-tree-dump "# prephitmp_\[0-9\]+ = PHI <\[xy\]_\[0-9\]+\\(D\\)\[^,\]*, \[xy\]_\[0-9\]+\\(D\\)" "pre" } } */