[interpreter] Bytecode register optimizer.

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 caa0a78ccef04626e8adcb59427b2ef40173e42c..7f8134fb1628ecb7279c850eb76e545b04d01bb3 100644
--- a/src/interpreter/bytecode-array-builder.cc
+++ b/src/interpreter/bytecode-array-builder.cc
@@ -7,6 +7,7 @@
 #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 {
@@ -40,6 +41,11 @@ BytecodeArrayBuilder::BytecodeArrayBuilder(Isolate* isolate, Zone* zone,
         BytecodePeepholeOptimizer(&constant_array_builder_, pipeline_);
   }
 
+  if (FLAG_ignition_reo) {
+    pipeline_ = new (zone) BytecodeRegisterOptimizer(
+        zone, &temporary_allocator_, parameter_count, pipeline_);
+  }
+
   return_position_ =
       literal ? std::max(literal->start_position(), literal->end_position() - 1)
               : RelocInfo::kNoPosition;