[turbofan] Improve testability of the InstructionSelector.

src/compiler/instruction-selector.cc

 // 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.
 
 #include "src/compiler/instruction-selector.h"
 
 #include "src/compiler/instruction-selector-impl.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
 #include "src/compiler/pipeline.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 InstructionSelector::InstructionSelector(InstructionSequence* sequence,
-                                         SourcePositionTable* source_positions)
+                                         SourcePositionTable* source_positions,
+                                         Features features)
     : zone_(sequence->isolate()),
       sequence_(sequence),
       source_positions_(source_positions),
+      features_(features),
       current_block_(NULL),
       instructions_(InstructionDeque::allocator_type(zone())),
       defined_(graph()->NodeCount(), false, BoolVector::allocator_type(zone())),
       used_(graph()->NodeCount(), false, BoolVector::allocator_type(zone())) {}
 
 
 void InstructionSelector::SelectInstructions() {
   // Mark the inputs of all phis in loop headers as used.
   BasicBlockVector* blocks = schedule()->rpo_order();
   for (BasicBlockVectorIter i = blocks->begin(); i != blocks->end(); ++i) {
@@ skipping 970 matching lines @@
 
 
 void InstructionSelector::VisitCall(Node* call, BasicBlock* continuation,
                                     BasicBlock* deoptimization) {}
 
 #endif  // !V8_TURBOFAN_BACKEND
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8