[runtime] Optimize and unify rest parameters.

src/interface-descriptors.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_CALL_INTERFACE_DESCRIPTOR_H_
 #define V8_CALL_INTERFACE_DESCRIPTOR_H_
 
 #include "src/assembler.h"
 #include "src/macro-assembler.h"
 
 namespace v8 {
 namespace internal {
 
 class PlatformInterfaceDescriptor;
 
 #define INTERFACE_DESCRIPTOR_LIST(V)          \
   V(Void)                                     \
   V(Load)                                     \
   V(Store)                                    \
   V(StoreTransition)                          \
   V(VectorStoreTransition)                    \
   V(VectorStoreICTrampoline)                  \
   V(VectorStoreIC)                            \
   V(InstanceOf)                               \
   V(LoadWithVector)                           \
   V(FastNewClosure)                           \
   V(FastNewContext)                           \
+  V(FastNewRestParameter)                     \
   V(ToNumber)                                 \
   V(ToLength)                                 \
   V(ToString)                                 \
   V(ToName)                                   \
   V(ToObject)                                 \
   V(NumberToString)                           \
   V(Typeof)                                   \
   V(FastCloneRegExp)                          \
   V(FastCloneShallowArray)                    \
   V(FastCloneShallowObject)                   \
@@ skipping 24 matching lines @@
   V(StringCompare)                            \
   V(Keyed)                                    \
   V(Named)                                    \
   V(CallHandler)                              \
   V(ArgumentAdaptor)                          \
   V(ApiFunction)                              \
   V(ApiAccessor)                              \
   V(ApiGetter)                                \
   V(ArgumentsAccessRead)                      \
   V(ArgumentsAccessNew)                       \
-  V(RestParamAccess)                          \
   V(LoadGlobalViaContext)                     \
   V(StoreGlobalViaContext)                    \
   V(MathPowTagged)                            \
   V(MathPowInteger)                           \
   V(ContextOnly)                              \
   V(GrowArrayElements)                        \
   V(InterpreterPushArgsAndCall)               \
   V(InterpreterPushArgsAndConstruct)          \
   V(InterpreterCEntry)
 
-
 class CallInterfaceDescriptorData {
  public:
   CallInterfaceDescriptorData()
       : register_param_count_(-1), function_type_(nullptr) {}
 
   // A copy of the passed in registers and param_representations is made
   // and owned by the CallInterfaceDescriptorData.
 
   void InitializePlatformIndependent(FunctionType* function_type) {
     function_type_ = function_type;
@@ skipping 273 matching lines @@
  public:
   DECLARE_DESCRIPTOR(FastNewClosureDescriptor, CallInterfaceDescriptor)
 };
 
 
 class FastNewContextDescriptor : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR(FastNewContextDescriptor, CallInterfaceDescriptor)
 };
 
+class FastNewRestParameterDescriptor : public CallInterfaceDescriptor {
+ public:
+  DECLARE_DESCRIPTOR(FastNewRestParameterDescriptor, CallInterfaceDescriptor)
+};
+
 
 class ToNumberDescriptor : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR(ToNumberDescriptor, CallInterfaceDescriptor)
 };
 
 
 class ToLengthDescriptor : public CallInterfaceDescriptor {
  public:
   enum ParameterIndices { kReceiverIndex };
@@ skipping 323 matching lines @@
  public:
   DECLARE_DESCRIPTOR_WITH_CUSTOM_FUNCTION_TYPE(ArgumentsAccessNewDescriptor,
                                                CallInterfaceDescriptor)
 
   static const Register function();
   static const Register parameter_count();
   static const Register parameter_pointer();
 };
 
 
-class RestParamAccessDescriptor : public CallInterfaceDescriptor {
- public:
-  DECLARE_DESCRIPTOR_WITH_CUSTOM_FUNCTION_TYPE(RestParamAccessDescriptor,
-                                               CallInterfaceDescriptor)
-  static const Register parameter_count();
-  static const Register parameter_pointer();
-  static const Register rest_parameter_index();
-};
-
-
 class MathPowTaggedDescriptor : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR(MathPowTaggedDescriptor, CallInterfaceDescriptor)
 
   static const Register exponent();
 };
 
 
 class MathPowIntegerDescriptor : public CallInterfaceDescriptor {
  public:
@@ skipping 53 matching lines @@
 }  // namespace v8
 
 
 #if V8_TARGET_ARCH_ARM64
 #include "src/arm64/interface-descriptors-arm64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "src/arm/interface-descriptors-arm.h"
 #endif
 
 #endif  // V8_CALL_INTERFACE_DESCRIPTOR_H_