[Interpreter] Avoid allocating pairs array in VisitDeclarations.

src/interpreter/bytecode-array-builder.cc

Index: src/interpreter/bytecode-array-builder.cc
diff --git a/src/interpreter/bytecode-array-builder.cc b/src/interpreter/bytecode-array-builder.cc
index 7e7a142538b334c6fd6c88c69d2479457bc65ff8..1aefe7af493959d1f1f39d7f0ab7451bc15aa556 100644
--- a/src/interpreter/bytecode-array-builder.cc
+++ b/src/interpreter/bytecode-array-builder.cc
@@ -179,6 +179,12 @@ BytecodeArrayBuilder& BytecodeArrayBuilder::CompareOperation(Token::Value op,
   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();
@@ -633,6 +639,15 @@ size_t BytecodeArrayBuilder::GetConstantPoolEntry(Handle<Object> object) {
   return constant_array_builder()->Insert(object);
 }
 
+size_t BytecodeArrayBuilder::AllocateConstantPoolEntry() {
+  return constant_array_builder()->AllocateEntry();
+}
+
+void BytecodeArrayBuilder::InsertConstantPoolEntryAt(size_t entry,
+                                                     Handle<Object> object) {
+  constant_array_builder()->InsertAllocatedEntry(entry, object);
+}
+
 void BytecodeArrayBuilder::SetReturnPosition() {
   if (return_position_ == kNoSourcePosition) return;
   latest_source_info_.MakeStatementPosition(return_position_);