[stubs] Reduce number of StoreTransitionStub instances.

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 <memory>
 
 #include "src/assembler.h"
 #include "src/macro-assembler.h"
 
 namespace v8 {
 namespace internal {
 
 class PlatformInterfaceDescriptor;
 
 #define INTERFACE_DESCRIPTOR_LIST(V)      \
   V(Void)                                 \
   V(ContextOnly)                          \
   V(Load)                                 \
   V(LoadWithVector)                       \
   V(LoadGlobal)                           \
   V(LoadGlobalWithVector)                 \
   V(Store)                                \
   V(StoreWithVector)                      \
+  V(StoreNamedTransition)                 \
   V(StoreTransition)                      \
   V(VarArgFunction)                       \
   V(FastNewClosure)                       \
   V(FastNewFunctionContext)               \
   V(FastNewObject)                        \
   V(FastNewRestParameter)                 \
   V(FastNewSloppyArguments)               \
   V(FastNewStrictArguments)               \
   V(TypeConversion)                       \
   V(Typeof)                               \
@@ skipping 305 matching lines @@
                                                StoreDescriptor)
 
   static const Register MapRegister();
   static const Register SlotRegister();
   static const Register VectorRegister();
 
   // Pass value, slot and vector through the stack.
   static const int kStackArgumentsCount = kPassLastArgsOnStack ? 3 : 0;
 };
 
+class StoreNamedTransitionDescriptor : public StoreTransitionDescriptor {
+ public:
+  DEFINE_PARAMETERS(kReceiver, kFieldOffset, kMap, kValue, kSlot, kVector,
+                    kName)
+  DECLARE_DESCRIPTOR_WITH_CUSTOM_FUNCTION_TYPE(StoreNamedTransitionDescriptor,
+                                               StoreTransitionDescriptor)
+
+  // Always pass name on the stack.
+  static const bool kPassLastArgsOnStack = true;
+  static const int kStackArgumentsCount =
+      StoreTransitionDescriptor::kStackArgumentsCount + 1;
+
+  static const Register NameRegister() { return no_reg; }
+  static const Register FieldOffsetRegister() {
+    return StoreTransitionDescriptor::NameRegister();
+  }
+};
+
 class StoreWithVectorDescriptor : public StoreDescriptor {
  public:
   DEFINE_PARAMETERS(kReceiver, kName, kValue, kSlot, kVector)
   DECLARE_DESCRIPTOR_WITH_CUSTOM_FUNCTION_TYPE(StoreWithVectorDescriptor,
                                                StoreDescriptor)
 
   static const Register VectorRegister();
 
   // Pass value, slot and vector through the stack.
   static const int kStackArgumentsCount = kPassLastArgsOnStack ? 3 : 0;
@@ skipping 454 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_