[Interpreter] Make dispatch table point to code entry instead of code objects.

src/compiler/linkage.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_LINKAGE_H_
 #define V8_COMPILER_LINKAGE_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/frame.h"
 #include "src/compiler/operator.h"
@@ skipping 286 matching lines @@
 
 // Defines the linkage for a compilation, including the calling conventions
 // for incoming parameters and return value(s) as well as the outgoing calling
 // convention for any kind of call. Linkage is generally architecture-specific.
 //
 // Can be used to translate {arg_index} (i.e. index of the call node input) as
 // well as {param_index} (i.e. as stored in parameter nodes) into an operator
 // representing the architecture-specific location. The following call node
 // layouts are supported (where {n} is the number of value inputs):
 //
-//                  #0          #1     #2     #3     [...]             #n
-// Call[CodeStub]   code,       arg 1, arg 2, arg 3, [...],            context
-// Call[JSFunction] function,   rcvr,  arg 1, arg 2, [...], new, #arg, context
-// Call[Runtime]    CEntryStub, arg 1, arg 2, arg 3, [...], fun, #arg, context
+//                        #0          #1     #2     [...]             #n
+// Call[CodeStub]         code,       arg 1, arg 2, [...],            context
+// Call[JSFunction]       function,   rcvr,  arg 1, [...], new, #arg, context
+// Call[Runtime]          CEntryStub, arg 1, arg 2, [...], fun, #arg, context
+// Call[BytecodeDispatch] address,    arg 1, arg 2, [...],            context
 class Linkage : public ZoneObject {
  public:
   explicit Linkage(CallDescriptor* incoming) : incoming_(incoming) {}
 
   static CallDescriptor* ComputeIncoming(Zone* zone, CompilationInfo* info);
 
   // The call descriptor for this compilation unit describes the locations
   // of incoming parameters and the outgoing return value(s).
   CallDescriptor* GetIncomingDescriptor() const { return incoming_; }
   static CallDescriptor* GetJSCallDescriptor(Zone* zone, bool is_osr,
                                              int parameter_count,
                                              CallDescriptor::Flags flags);
 
   static CallDescriptor* GetRuntimeCallDescriptor(
       Zone* zone, Runtime::FunctionId function, int parameter_count,
       Operator::Properties properties, CallDescriptor::Flags flags);
 
   static CallDescriptor* GetStubCallDescriptor(
       Isolate* isolate, Zone* zone, const CallInterfaceDescriptor& descriptor,
       int stack_parameter_count, CallDescriptor::Flags flags,
       Operator::Properties properties = Operator::kNoProperties,
       MachineType return_type = MachineType::AnyTagged(),
       size_t return_count = 1);
 
+  static CallDescriptor* GetBytecodeDispatchCallDescriptor(
+      Isolate* isolate, Zone* zone, const CallInterfaceDescriptor& descriptor,
+      int stack_parameter_count);
+
   // Creates a call descriptor for simplified C calls that is appropriate
   // for the host platform. This simplified calling convention only supports
   // integers and pointers of one word size each, i.e. no floating point,
   // structs, pointers to members, etc.
   static CallDescriptor* GetSimplifiedCDescriptor(
       Zone* zone, const MachineSignature* sig,
       bool set_initialize_root_flag = false);
 
   // Get the location of an (incoming) parameter to this function.
   LinkageLocation GetParameterLocation(int index) const {
@@ skipping 53 matching lines @@
   CallDescriptor* const incoming_;
 
   DISALLOW_COPY_AND_ASSIGN(Linkage);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_LINKAGE_H_