src/share/vm/opto/cfgnode.cpp

*** 1631,1651 ****
    if( phase->type_or_null(r) == Type::TOP ) // Dead code?
      return NULL;                // No change
  
    // If all inputs are value types, push the value type node down through the
    // phi because value type nodes should be merged through their input values.
!   bool all_vt = true;
!   for (uint i = 1; i < req() && all_vt; ++i) {
!     all_vt = in(i) && in(i)->is_ValueType();
    }
!   if (req() > 2 && all_vt) {
!     ValueTypeNode* vt = in(1)->as_ValueType()->clone_with_phis(phase, in(0));
      for (uint i = 2; i < req(); ++i) {
        vt->merge_with(phase, in(i)->as_ValueType(), i, i == (req()-1));
      }
      return vt;
    }
  
    Node *top = phase->C->top();
    bool new_phi = (outcnt() == 0); // transforming new Phi
    // No change for igvn if new phi is not hooked
    if (new_phi && can_reshape)
--- 1631,1654 ----
    if( phase->type_or_null(r) == Type::TOP ) // Dead code?
      return NULL;                // No change
  
    // If all inputs are value types, push the value type node down through the
    // phi because value type nodes should be merged through their input values.
!   if (req() > 2 && in(1) && in(1)->is_ValueTypeBase()) {
!     int opcode = in(1)->Opcode();
!     uint i = 2;
!     for (; i < req() && in(i) && in(i)->is_ValueTypeBase(); i++) {
!       assert(in(i)->Opcode() == opcode, "mixing pointers and values?");
      }
!     if (i == req()) {
!       ValueTypeBaseNode* vt = in(1)->as_ValueTypeBase()->clone_with_phis(phase, in(0));
        for (uint i = 2; i < req(); ++i) {
          vt->merge_with(phase, in(i)->as_ValueType(), i, i == (req()-1));
        }
        return vt;
      }
+   }
  
    Node *top = phase->C->top();
    bool new_phi = (outcnt() == 0); // transforming new Phi
    // No change for igvn if new phi is not hooked
    if (new_phi && can_reshape)