[Bug tree-optimization/36327] New: SCCVN should look through struct copies

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

struct X { int i; int j; };
void bar (struct X *);
int foo (struct X *p)
{
  struct X x;
  p->i = 1;
  x = *p;
  x.j = 2;
  return p->i - x.i;
}

this should be optimized to return zero.  -fno-tree-sra required to show
the missed optimization.


-- 
           Summary: SCCVN should look through struct copies
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rguenth at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36327