[turbofan] Add support for storing to double fields.

src/compiler/common-operator.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_COMMON_OPERATOR_H_
 #define V8_COMPILER_COMMON_OPERATOR_H_
 
 #include "src/compiler/frame-states.h"
 #include "src/compiler/machine-type.h"
 #include "src/zone-containers.h"
 
 namespace v8 {
 namespace internal {
 
 // Forward declarations.
 class ExternalReference;
+template <class>
+class TypeImpl;
+struct ZoneTypeConfig;
+typedef TypeImpl<ZoneTypeConfig> Type;
 
 
 namespace compiler {
 
 // Forward declarations.
 class CallDescriptor;
 struct CommonOperatorGlobalCache;
 class Operator;
 
 
@@ skipping 111 matching lines @@
   const Operator* Float32Constant(volatile float);
   const Operator* Float64Constant(volatile double);
   const Operator* ExternalConstant(const ExternalReference&);
   const Operator* NumberConstant(volatile double);
   const Operator* HeapConstant(const Handle<HeapObject>&);
 
   const Operator* Select(MachineType, BranchHint = BranchHint::kNone);
   const Operator* Phi(MachineType type, int value_input_count);
   const Operator* EffectPhi(int effect_input_count);
   const Operator* EffectSet(int arguments);
+  const Operator* Guard(Type* type);
   const Operator* BeginRegion();
   const Operator* FinishRegion();
   const Operator* StateValues(int arguments);
   const Operator* TypedStateValues(const ZoneVector<MachineType>* types);
   const Operator* FrameState(BailoutId bailout_id,
                              OutputFrameStateCombine state_combine,
                              const FrameStateFunctionInfo* function_info);
   const Operator* Call(const CallDescriptor* descriptor);
   const Operator* TailCall(const CallDescriptor* descriptor);
   const Operator* Projection(size_t index);
@@ skipping 16 matching lines @@
   Zone* const zone_;
 
   DISALLOW_COPY_AND_ASSIGN(CommonOperatorBuilder);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_COMMON_OPERATOR_H_