[interpreter] Bytecode register optimizer.

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/interpreter/bytecode-array-writer.h"
 #include "src/interpreter/bytecode-peephole-optimizer.h"
+#include "src/interpreter/bytecode-register-optimizer.h"
 #include "src/interpreter/interpreter-intrinsics.h"
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
 BytecodeArrayBuilder::BytecodeArrayBuilder(Isolate* isolate, Zone* zone,
                                            int parameter_count,
                                            int context_count, int locals_count,
                                            FunctionLiteral* literal)
@@ skipping 13 matching lines @@
       pipeline_(&bytecode_array_writer_) {
   DCHECK_GE(parameter_count_, 0);
   DCHECK_GE(context_register_count_, 0);
   DCHECK_GE(local_register_count_, 0);
 
   if (FLAG_ignition_peephole) {
     pipeline_ = new (zone)
         BytecodePeepholeOptimizer(&constant_array_builder_, pipeline_);
   }
 
+  if (FLAG_ignition_reo) {
+    pipeline_ = new (zone)
+        BytecodeRegisterOptimizer(zone, &temporary_allocator_, parameter_count,
+                                  fixed_register_count(), pipeline_);
+  }
+
   return_position_ =
       literal ? std::max(literal->start_position(), literal->end_position() - 1)
               : RelocInfo::kNoPosition;
   LOG_CODE_EVENT(isolate_, CodeStartLinePosInfoRecordEvent(
                                source_position_table_builder()));
 }
 
 Register BytecodeArrayBuilder::first_context_register() const {
   DCHECK_GT(context_register_count_, 0);
   return Register(local_register_count_);
@@ skipping 1231 matching lines @@
 }
 
 uint32_t BytecodeArrayBuilder::UnsignedOperand(size_t value) {
   DCHECK_LE(value, kMaxUInt32);
   return static_cast<uint32_t>(value);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8