[Bug tree-optimization/39713] New: [4.4/4.5 Regression] ICE in get_expr_value_id

["jakub at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Since r141534 (PR37542), the following testcase segfaults during fre at -O1 and
higher:

template <typename To, typename From>
static inline To
bitwise_cast (From from)
{
  union
  {
    From f;
    To t;
  } u;
  u.f = from;
  return u.t;
}

extern void foo (unsigned char *);

double
bar ()
{
  unsigned char b[sizeof (unsigned long long)];
  foo (b);
  return bitwise_cast<double> (*(unsigned long long *) b);
}


-- 
           Summary: [4.4/4.5 Regression] ICE in get_expr_value_id
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jakub at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39713