Split ToDouble into two IL instruction to make it work with SSA.

runtime/vm/intermediate_language.cc

 // 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.
 
 #include "vm/intermediate_language.h"
 
 #include "vm/bit_vector.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_allocator.h"
 #include "vm/flow_graph_builder.h"
@@ skipping 815 matching lines @@
 RawAbstractType* UnarySmiOpComp::CompileType() const {
   return Type::IntInterface();
 }
 
 
 RawAbstractType* NumberNegateComp::CompileType() const {
   return Type::NumberInterface();
 }
 
 
-RawAbstractType* ToDoubleComp::CompileType() const {
+RawAbstractType* DoubleToDoubleComp::CompileType() const {
+  return Type::DoubleInterface();
+}
+
+
+RawAbstractType* SmiToDoubleComp::CompileType() const {
   return Type::DoubleInterface();
 }
 
 
 // Shared code generation methods (EmitNativeCode, MakeLocationSummary, and
 // PrepareEntry). Only assembly code that can be shared across all architectures
 // can be used. Machine specific register allocation and code generation
 // is located in intermediate_language_<arch>.cc
 
 
@@ skipping 462 matching lines @@
   if (compiler->is_ssa()) {
     ASSERT(locs()->in(0).IsRegister());
     __ PushRegister(locs()->in(0).reg());
   }
 }
 
 
 #undef __
 
 }  // namespace dart