[Bug tree-optimization/36084] New: not longer folding of (int[<unknown>] *) &i[0] into &i

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

Testcase:
int f(int c)
{
  int i[] = { 0, 1, 2, 3, 4};
  typedef int a[];
  a *b = (a*)&i[0];
  return (*b)[0];
}

--- CUT ---
We don't fold this into just return 0 with at least the C++ front-end.  I found
this while improving PR 26069 and it happens many times with the Fortran
front-end more than any other because of inlining and how arrays are done.


-- 
           Summary: not longer folding of (int[<unknown>] *) &i[0] into &i
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: missed-optimization, TREE
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36084