[Bug middle-end/42588] unnecessary move through x87 stack/local frame for union

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2010-01-03 06:49 -------
Here is an example which shows the issue on PPC also:
union __anonunion___u_19
{
  double __d;
  int __i[2];
};
     extern int __signbit (double *__x)
{
  union __anonunion___u_19 __u;
  {
    __u.__d = *__x;
    return (__u.__i[1] < 0);
  }
}


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42588