[Interpreter] Fill out function prologue support.

src/interpreter/bytecode-array-builder.cc

 // Copyright 2015 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 "src/interpreter/bytecode-array-builder.h"
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
@@ skipping 371 matching lines @@
 
 
 BytecodeArrayBuilder& BytecodeArrayBuilder::CreateClosure(
     PretenureFlag tenured) {
   DCHECK(FitsInImm8Operand(tenured));
   Output(Bytecode::kCreateClosure, static_cast<uint8_t>(tenured));
   return *this;
 }
 
 
+BytecodeArrayBuilder& BytecodeArrayBuilder::CreateArguments(
+    CreateArgumentsType type) {
+  // TODO(rmcilroy): Consider passing the type as a bytecode operand rather
+  // than having two different bytecodes once we have better support for
+  // branches in the InterpreterAssembler.
+  Bytecode bytecode = BytecodeForCreateArguments(type);
+  Output(bytecode);
+  return *this;
+}
+
+
 BytecodeArrayBuilder& BytecodeArrayBuilder::CreateRegExpLiteral(
     int literal_index, Register flags) {
   if (FitsInIdx8Operand(literal_index)) {
     Output(Bytecode::kCreateRegExpLiteral, static_cast<uint8_t>(literal_index),
            flags.ToOperand());
   } else {
     UNIMPLEMENTED();
   }
   return *this;
 }
@@ skipping 581 matching lines @@
     case STRONG:
       UNIMPLEMENTED();
     default:
       UNREACHABLE();
   }
   return static_cast<Bytecode>(-1);
 }
 
 
 // static
+Bytecode BytecodeArrayBuilder::BytecodeForCreateArguments(
+    CreateArgumentsType type) {
+  switch (type) {
+    case CreateArgumentsType::kMappedArguments:
+      return Bytecode::kCreateMappedArguments;
+    case CreateArgumentsType::kUnmappedArguments:
+      return Bytecode::kCreateUnmappedArguments;
+    default:
+      UNREACHABLE();
+  }
+  return static_cast<Bytecode>(-1);
+}
+
+
+// static
 bool BytecodeArrayBuilder::FitsInIdx8Operand(int value) {
   return kMinUInt8 <= value && value <= kMaxUInt8;
 }
 
 
 // static
 bool BytecodeArrayBuilder::FitsInIdx8Operand(size_t value) {
   return value <= static_cast<size_t>(kMaxUInt8);
 }
 
@@ skipping 46 matching lines @@
   DCHECK_GT(next_consecutive_count_, 0);
   builder_->BorrowConsecutiveTemporaryRegister(next_consecutive_register_);
   allocated_.push_back(next_consecutive_register_);
   next_consecutive_count_--;
   return Register(next_consecutive_register_++);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8