Implement a variation of scalar replacement for non-escaping allocations.

runtime/vm/flow_graph_compiler.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_FLOW_GRAPH_COMPILER_H_
 #define VM_FLOW_GRAPH_COMPILER_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 #include "vm/code_descriptors.h"
@@ skipping 98 matching lines @@
  public:
   CompilerDeoptInfo(intptr_t deopt_id, DeoptReasonId reason)
       : pc_offset_(-1),
         deopt_id_(deopt_id),
         reason_(reason),
         deoptimization_env_(NULL) {}
 
   RawDeoptInfo* CreateDeoptInfo(FlowGraphCompiler* compiler,
                                 DeoptInfoBuilder* builder);
 
-  void AllocateIncomingParametersRecursive(Environment* env,
-                                           intptr_t* stack_height);
 
   // No code needs to be generated.
   virtual void GenerateCode(FlowGraphCompiler* compiler, intptr_t stub_ix) {}
 
   intptr_t pc_offset() const { return pc_offset_; }
   void set_pc_offset(intptr_t offset) { pc_offset_ = offset; }
 
   intptr_t deopt_id() const { return deopt_id_; }
 
   DeoptReasonId reason() const { return reason_; }
 
   const Environment* deoptimization_env() const { return deoptimization_env_; }
   void set_deoptimization_env(Environment* env) { deoptimization_env_ = env; }
 
  private:
+  void EmitMaterializations(Environment* env, DeoptInfoBuilder* builder);
+
+  void AllocateIncomingParametersRecursive(Environment* env,
+                                           intptr_t* stack_height);
+
   intptr_t pc_offset_;
   const intptr_t deopt_id_;
   const DeoptReasonId reason_;
   Environment* deoptimization_env_;
 
   DISALLOW_COPY_AND_ASSIGN(CompilerDeoptInfo);
 };
 
 
 class CompilerDeoptInfoWithStub : public CompilerDeoptInfo {
@@ skipping 434 matching lines @@
   // that should be used when deoptimizing we store it in this variable.
   // In future AddDeoptStub should be moved out of the instruction template.
   Environment* pending_deoptimization_env_;
 
   DISALLOW_COPY_AND_ASSIGN(FlowGraphCompiler);
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_COMPILER_H_