Reland r20974: Unify and simplify the FastCloneShallowArrayStub

src/x64/code-stubs-x64.cc

 // Copyright 2013 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.
 
 #include "v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "bootstrapper.h"
 #include "code-stubs.h"
@@ skipping 41 matching lines @@
   descriptor->deoptimization_handler_ =
       Runtime::FunctionForId(Runtime::kHiddenNumberToString)->entry;
 }
 
 
 void FastCloneShallowArrayStub::InitializeInterfaceDescriptor(
     CodeStubInterfaceDescriptor* descriptor) {
   static Register registers[] = { rax, rbx, rcx };
   descriptor->register_param_count_ = 3;
   descriptor->register_params_ = registers;
+  static Representation representations[] = {
+    Representation::Tagged(),
+    Representation::Smi(),
+    Representation::Tagged() };
+  descriptor->register_param_representations_ = representations;
   descriptor->deoptimization_handler_ =
       Runtime::FunctionForId(
           Runtime::kHiddenCreateArrayLiteralStubBailout)->entry;
 }
 
 
 void FastCloneShallowObjectStub::InitializeInterfaceDescriptor(
     CodeStubInterfaceDescriptor* descriptor) {
   static Register registers[] = { rax, rbx, rcx, rdx };
   descriptor->register_param_count_ = 4;
@@ skipping 109 matching lines @@
   static Register registers_no_args[] = { rdi, rbx };
 
   if (constant_stack_parameter_count == 0) {
     descriptor->register_param_count_ = 2;
     descriptor->register_params_ = registers_no_args;
   } else {
     // stack param count needs (constructor pointer, and single argument)
     descriptor->handler_arguments_mode_ = PASS_ARGUMENTS;
     descriptor->stack_parameter_count_ = rax;
     descriptor->register_param_count_ = 3;
+    static Representation representations[] = {
+        Representation::Tagged(),
+        Representation::Tagged(),
+        Representation::Integer32() };
+    descriptor->register_param_representations_ = representations;
     descriptor->register_params_ = registers_variable_args;
   }
 
   descriptor->hint_stack_parameter_count_ = constant_stack_parameter_count;
   descriptor->function_mode_ = JS_FUNCTION_STUB_MODE;
   descriptor->deoptimization_handler_ =
       Runtime::FunctionForId(Runtime::kHiddenArrayConstructor)->entry;
 }
 
 
 static void InitializeInternalArrayConstructorDescriptor(
     CodeStubInterfaceDescriptor* descriptor,
     int constant_stack_parameter_count) {
   // register state
   // rax -- number of arguments
   // rdi -- constructor function
   static Register registers_variable_args[] = { rdi, rax };
   static Register registers_no_args[] = { rdi };
 
   if (constant_stack_parameter_count == 0) {
     descriptor->register_param_count_ = 1;
     descriptor->register_params_ = registers_no_args;
   } else {
     // stack param count needs (constructor pointer, and single argument)
     descriptor->handler_arguments_mode_ = PASS_ARGUMENTS;
     descriptor->stack_parameter_count_ = rax;
     descriptor->register_param_count_ = 2;
     descriptor->register_params_ = registers_variable_args;
+    static Representation representations[] = {
+        Representation::Tagged(),
+        Representation::Integer32() };
+    descriptor->register_param_representations_ = representations;
   }
 
   descriptor->hint_stack_parameter_count_ = constant_stack_parameter_count;
   descriptor->function_mode_ = JS_FUNCTION_STUB_MODE;
   descriptor->deoptimization_handler_ =
       Runtime::FunctionForId(Runtime::kHiddenInternalArrayConstructor)->entry;
 }
 
 
 void ArrayNoArgumentConstructorStub::InitializeInterfaceDescriptor(
@@ skipping 4788 matching lines @@
                               return_value_operand,
                               NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64