[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..c377b0e7bc8f0274936fb2f9d02300b7abbc44c6 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 +41,12 @@ BytecodeArrayBuilder::BytecodeArrayBuilder(Isolate* isolate, Zone* 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;