8255617: Zero: purge the remaining bytecode interpreter profiling support

Reviewed-by: coleenp, sgehwolf, jiefu

Author: shipilev

src/hotspot/cpu/zero/bytecodeInterpreter_zero.cpp

@@ -47,7 +47,6 @@ const char *BytecodeInterpreter::name_of_field_at_address(address addr) {
   DO(_constants);
   DO(_method);
   DO(_mirror);
-  DO(_mdx);
   DO(_stack);
   DO(_msg);
   DO(_result);
@@ -84,7 +83,6 @@ void BytecodeInterpreter::layout_interpreterState(interpreterState istate,
   istate->set_msg(BytecodeInterpreter::method_resume);
   istate->set_bcp_advance(0);
   istate->set_oop_temp(NULL);
-  istate->set_mdx(NULL);
   if (caller->is_interpreted_frame()) {
     interpreterState prev = caller->get_interpreterState();
     prev->set_callee(method);

src/hotspot/cpu/zero/frame_zero.inline.hpp

@@ -107,7 +107,8 @@ inline oop* frame::interpreter_frame_mirror_addr() const {
 }
 
 inline intptr_t* frame::interpreter_frame_mdp_addr() const {
-  return (intptr_t*) &(get_interpreterState()->_mdx);
+  fatal("Should not call this: Zero never profiles");
+  return NULL; // silence compiler warnings
 }
 
 inline intptr_t* frame::interpreter_frame_tos_address() const {

src/hotspot/cpu/zero/zeroInterpreter_zero.cpp

@@ -749,7 +749,6 @@ InterpreterFrame *InterpreterFrame::build(Method* const method, TRAPS) {
   istate->set_constants(method->constants()->cache());
   istate->set_msg(BytecodeInterpreter::method_entry);
   istate->set_oop_temp(NULL);
-  istate->set_mdx(NULL);
   istate->set_callee(NULL);
 
   istate->set_monitor_base((BasicObjectLock *) stack->sp());