src/share/vm/opto/compile.cpp

*** 2181,2191 ****
        Node* in1 = n->in(1);
        const Type* t = n->bottom_type();
        Node* new_in1 = in1->clone();
        new_in1->as_DecodeN()->set_type(t);
  
!       if (!Matcher::clone_shift_expressions) {
          //
          // x86, ARM and friends can handle 2 adds in addressing mode
          // and Matcher can fold a DecodeN node into address by using
          // a narrow oop directly and do implicit NULL check in address:
          //
--- 2181,2191 ----
        Node* in1 = n->in(1);
        const Type* t = n->bottom_type();
        Node* new_in1 = in1->clone();
        new_in1->as_DecodeN()->set_type(t);
  
!       if (!Matcher::narrow_oop_use_complex_address()) {
          //
          // x86, ARM and friends can handle 2 adds in addressing mode
          // and Matcher can fold a DecodeN node into address by using
          // a narrow oop directly and do implicit NULL check in address:
          //
*** 2289,2299 ****
  
    case Op_DecodeN:
      assert(!n->in(1)->is_EncodeP(), "should be optimized out");
      // DecodeN could be pinned on Sparc where it can't be fold into
      // an address expression, see the code for Op_CastPP above.
!     assert(n->in(0) == NULL || !Matcher::clone_shift_expressions, "no control except on sparc");
      break;
  
    case Op_EncodeP: {
      Node* in1 = n->in(1);
      if (in1->is_DecodeN()) {
--- 2289,2299 ----
  
    case Op_DecodeN:
      assert(!n->in(1)->is_EncodeP(), "should be optimized out");
      // DecodeN could be pinned on Sparc where it can't be fold into
      // an address expression, see the code for Op_CastPP above.
!     assert(n->in(0) == NULL || !Matcher::narrow_oop_use_complex_address(), "no control except on sparc");
      break;
  
    case Op_EncodeP: {
      Node* in1 = n->in(1);
      if (in1->is_DecodeN()) {