8146518: Zero interpreter broken with better byte behaviour

Reviewed-by: coleenp

src/cpu/zero/vm/cppInterpreter_zero.cpp

@@ -93,6 +93,7 @@ intptr_t narrow(BasicType type, intptr_t result) {
     case T_SHORT:
       return (intptr_t)(jshort)result;
     case T_OBJECT:  // nothing to do fall through
+    case T_ARRAY:
     case T_LONG:
     case T_INT:
     case T_FLOAT:
@@ -183,7 +184,7 @@ void CppInterpreter::main_loop(int recurse, TRAPS) {
     }
     else if (istate->msg() == BytecodeInterpreter::return_from_method) {
       // Copy the result into the caller's frame
-      result_slots = type2size[result_type_of(method)];
+      result_slots = type2size[method->result_type()];
       assert(result_slots >= 0 && result_slots <= 2, "what?");
       result = istate->stack() + result_slots;
       break;
@@ -221,7 +222,7 @@ void CppInterpreter::main_loop(int recurse, TRAPS) {
     // Adjust result to smaller
     intptr_t res = result[-i];
     if (result_slots == 1) {
-      res = narrow(result_type_of(method), res);
+      res = narrow(method->result_type(), res);
     }
     stack->push(res);
   }
@@ -435,7 +436,7 @@ int CppInterpreter::native_entry(Method* method, intptr_t UNUSED, TRAPS) {
 
   // Push our result
   if (!HAS_PENDING_EXCEPTION) {
-    BasicType type = result_type_of(method);
+    BasicType type = method->result_type();
     stack->set_sp(stack->sp() - type2size[type]);
 
     switch (type) {
@@ -795,26 +796,6 @@ int AbstractInterpreter::BasicType_as_index(BasicType type) {
   return i;
 }
 
-BasicType CppInterpreter::result_type_of(Method* method) {
-  BasicType t;
-  switch (method->result_index()) {
-    case 0 : t = T_BOOLEAN; break;
-    case 1 : t = T_CHAR;    break;
-    case 2 : t = T_BYTE;    break;
-    case 3 : t = T_SHORT;   break;
-    case 4 : t = T_INT;     break;
-    case 5 : t = T_LONG;    break;
-    case 6 : t = T_VOID;    break;
-    case 7 : t = T_FLOAT;   break;
-    case 8 : t = T_DOUBLE;  break;
-    case 9 : t = T_OBJECT;  break;
-    default: ShouldNotReachHere();
-  }
-  assert(AbstractInterpreter::BasicType_as_index(t) == method->result_index(),
-         "out of step with AbstractInterpreter::BasicType_as_index");
-  return t;
-}
-
 address InterpreterGenerator::generate_empty_entry() {
   if (!UseFastEmptyMethods)
     return NULL;

src/cpu/zero/vm/cppInterpreter_zero.hpp

 /*
- * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2007, 2008, 2010, 2011 Red Hat, Inc.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -49,8 +49,4 @@
   static intptr_t* calculate_unwind_sp(ZeroStack* stack, oop method_handle);
   static void throw_exception(JavaThread* thread, Symbol* name,char *msg=NULL);
 
- private:
-  // Fast result type determination
-  static BasicType result_type_of(Method* method);
-
 #endif // CPU_ZERO_VM_CPPINTERPRETER_ZERO_HPP

src/share/vm/oops/method.cpp

@@ -84,9 +84,6 @@ Method::Method(ConstMethod* xconst, AccessFlags access_flags, int size) {
   set_constMethod(xconst);
   set_access_flags(access_flags);
   set_method_size(size);
-#ifdef CC_INTERP
-  set_result_index(T_VOID);
-#endif
   set_intrinsic_id(vmIntrinsics::_none);
   set_jfr_towrite(false);
   set_force_inline(false);
@@ -412,12 +409,6 @@ void Method::compute_size_of_parameters(Thread *thread) {
   set_size_of_parameters(asc.size() + (is_static() ? 0 : 1));
 }
 
-#ifdef CC_INTERP
-void Method::set_result_index(BasicType type)          {
-  _result_index = Interpreter::BasicType_as_index(type);
-}
-#endif
-
 BasicType Method::result_type() const {
   ResultTypeFinder rtf(signature());
   return rtf.type();

src/share/vm/oops/method.hpp

 /*
- * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -105,9 +105,6 @@ class Method : public Metadata {
   AccessFlags       _access_flags;               // Access flags
   int               _vtable_index;               // vtable index of this method (see VtableIndexFlag)
                                                  // note: can have vtables with >2**16 elements (because of inheritance)
-#ifdef CC_INTERP
-  int               _result_index;               // C++ interpreter needs for converting results to/from stack
-#endif
   u2                _method_size;                // size of this object
   u1                _intrinsic_id;               // vmSymbols::intrinsic_id (0 == _none)
   u1                _jfr_towrite          : 1,   // Flags
@@ -202,11 +199,6 @@ class Method : public Metadata {
     return constMethod()->type_annotations();
   }
 
-#ifdef CC_INTERP
-  void set_result_index(BasicType type);
-  int  result_index()                            { return _result_index; }
-#endif
-
   // Helper routine: get klass name + "." + method name + signature as
   // C string, for the purpose of providing more useful NoSuchMethodErrors
   // and fatal error handling. The string is allocated in resource
@@ -559,7 +551,6 @@ class Method : public Metadata {
   void compute_size_of_parameters(Thread *thread); // word size of parameters (receiver if any + arguments)
   Symbol* klass_name() const;                    // returns the name of the method holder
   BasicType result_type() const;                 // type of the method result
-  int result_type_index() const;                 // type index of the method result
   bool is_returning_oop() const                  { BasicType r = result_type(); return (r == T_OBJECT || r == T_ARRAY); }
   bool is_returning_fp() const                   { BasicType r = result_type(); return (r == T_FLOAT || r == T_DOUBLE); }
 
@@ -652,9 +643,6 @@ class Method : public Metadata {
   // interpreter support
   static ByteSize const_offset()                 { return byte_offset_of(Method, _constMethod       ); }
   static ByteSize access_flags_offset()          { return byte_offset_of(Method, _access_flags      ); }
-#ifdef CC_INTERP
-  static ByteSize result_index_offset()          { return byte_offset_of(Method, _result_index ); }
-#endif /* CC_INTERP */
   static ByteSize from_compiled_offset()         { return byte_offset_of(Method, _from_compiled_entry); }
   static ByteSize code_offset()                  { return byte_offset_of(Method, _code); }
   static ByteSize method_data_offset()           {