[Interpreter] Avoid allocating pairs array in VisitDeclarations.

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"
 
 #include "src/compiler.h"
 #include "src/globals.h"
 #include "src/interpreter/bytecode-array-writer.h"
 #include "src/interpreter/bytecode-dead-code-optimizer.h"
@@ skipping 161 matching lines @@
   Output(Bytecode::kTypeOf);
   return *this;
 }
 
 BytecodeArrayBuilder& BytecodeArrayBuilder::CompareOperation(Token::Value op,
                                                              Register reg) {
   Output(BytecodeForCompareOperation(op), RegisterOperand(reg));
   return *this;
 }
 
+BytecodeArrayBuilder& BytecodeArrayBuilder::LoadConstantPoolEntry(
+    size_t entry) {
+  Output(Bytecode::kLdaConstant, UnsignedOperand(entry));
+  return *this;
+}
+
 BytecodeArrayBuilder& BytecodeArrayBuilder::LoadLiteral(
     v8::internal::Smi* smi) {
   int32_t raw_smi = smi->value();
   if (raw_smi == 0) {
     Output(Bytecode::kLdaZero);
   } else {
     Output(Bytecode::kLdaSmi, SignedOperand(raw_smi));
   }
   return *this;
 }
@@ skipping 433 matching lines @@
 BytecodeArrayBuilder& BytecodeArrayBuilder::Delete(Register object,
                                                    LanguageMode language_mode) {
   Output(BytecodeForDelete(language_mode), RegisterOperand(object));
   return *this;
 }
 
 size_t BytecodeArrayBuilder::GetConstantPoolEntry(Handle<Object> object) {
   return constant_array_builder()->Insert(object);
 }
 
+size_t BytecodeArrayBuilder::ReserveConstantPoolEntry() {
+  return constant_array_builder()->ReserveEntry();
+}
+
+void BytecodeArrayBuilder::InsertReservedConstantPoolEntry(
+    size_t entry, Handle<Object> object) {
+  constant_array_builder()->InsertReservedEntry(entry, object);
+}
+
 void BytecodeArrayBuilder::SetReturnPosition() {
   if (return_position_ == kNoSourcePosition) return;
   latest_source_info_.MakeStatementPosition(return_position_);
 }
 
 void BytecodeArrayBuilder::SetStatementPosition(Statement* stmt) {
   if (stmt->position() == kNoSourcePosition) return;
   latest_source_info_.MakeStatementPosition(stmt->position());
 }
 
@@ skipping 287 matching lines @@
       return Bytecode::kTailCall;
     default:
       UNREACHABLE();
   }
   return Bytecode::kIllegal;
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8