[Bug tree-optimization/36945] New: [4.4 Regression] PRE/SCCVN do not handle aggregate function arguments correctly

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

struct Bar { int a; int b; };
struct Foo { int x; struct Bar y; };

int __attribute__((const)) foo (struct Bar);

int bar (int b)
{
  struct Foo f;
  int c;
  while (b--)
    {
      c = foo(f.y);
    }
  return c;
}

./cc1 -quiet -O2 t.i -fdump-tree-all-details
t.i: In function 'bar':
t.i:7: internal compiler error: vector VEC(vn_reference_op_s,base) index domain
error, in create_component_ref_by_pieces at tree-ssa-pre.c:2413
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


-- 
           Summary: [4.4 Regression] PRE/SCCVN do not handle aggregate
                    function arguments correctly
           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: rguenth at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36945