Add MachineSignature, which is an encapsulation of the machine types for parameters and return valu…

src/compiler/structured-machine-assembler.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_STRUCTURED_MACHINE_ASSEMBLER_H_
 #define V8_COMPILER_STRUCTURED_MACHINE_ASSEMBLER_H_
 
 #include "src/v8.h"
 
 #include "src/compiler/common-operator.h"
@@ skipping 45 matching lines @@
     DISALLOW_COPY_AND_ASSIGN(Environment);
   };
 
   class IfBuilder;
   friend class IfBuilder;
   class LoopBuilder;
   friend class LoopBuilder;
 
   StructuredMachineAssembler(
       Graph* graph, MachineCallDescriptorBuilder* call_descriptor_builder,
-      MachineType word = MachineOperatorBuilder::pointer_rep());
+      MachineType word = kMachPtr);
   virtual ~StructuredMachineAssembler() {}
 
   Isolate* isolate() const { return zone()->isolate(); }
   Zone* zone() const { return graph()->zone(); }
   MachineOperatorBuilder* machine() { return &machine_; }
   CommonOperatorBuilder* common() { return &common_; }
   CallDescriptor* call_descriptor() const {
     return call_descriptor_builder_->BuildCallDescriptor(zone());
   }
   int parameter_count() const {
@@ skipping 219 matching lines @@
   EnvironmentVector pending_header_merges_;
   EnvironmentVector pending_exit_merges_;
   DISALLOW_COPY_AND_ASSIGN(LoopBuilder);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_STRUCTURED_MACHINE_ASSEMBLER_H_