Use zone when allocating handles in FlowGraphCompiler assembling operations. Add profiling VM tags…

runtime/vm/intermediate_language.h

 // Copyright (c) 2013, 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_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 1730 matching lines @@
 
   // Printing support. These functions are sometimes overridden for custom
   // formatting. Otherwise, it prints in the format "opcode(op1, op2, op3)".
   virtual void PrintTo(BufferFormatter* f) const;
   virtual void PrintOperandsTo(BufferFormatter* f) const;
 
   // A value in the constant propagation lattice.
   //    - non-constant sentinel
   //    - a constant (any non-sentinel value)
   //    - unknown sentinel
-  Object& constant_value() const { return constant_value_; }
+  Object& constant_value();
 
   virtual void InferRange(RangeAnalysis* analysis, Range* range);
 
   Range* range() const { return range_; }
   void set_range(const Range&);
 
   // Definitions can be canonicalized only into definitions to ensure
   // this check statically we override base Canonicalize with a Canonicalize
   // returning Definition (return type is covariant).
   virtual Definition* Canonicalize(FlowGraph* flow_graph);
@@ skipping 32 matching lines @@
 
   Range* range_;
   CompileType* type_;
 
  private:
   intptr_t temp_index_;
   intptr_t ssa_temp_index_;
   Value* input_use_list_;
   Value* env_use_list_;
 
-  Object& constant_value_;
+  Object* constant_value_;
 
   DISALLOW_COPY_AND_ASSIGN(Definition);
 };
 
 
 // Change a value's definition after use lists have been computed.
 inline void Value::BindTo(Definition* def) {
   RemoveFromUseList();
   set_definition(def);
   def->AddInputUse(this);
@@ skipping 6284 matching lines @@
   LocationSummary* Name::MakeLocationSummary(Zone* zone, bool opt) const {    \
     UNIMPLEMENTED();                                                          \
     return NULL;                                                              \
   }                                                                           \
   void Name::EmitNativeCode(FlowGraphCompiler* compiler) { UNIMPLEMENTED(); }
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_