[compiler] Remove context value input from JSLoadContext and JSStoreContext.

src/compiler/js-context-specialization.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/js-context-specialization.h"
 
 #include "src/compiler/common-operator.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 15 matching lines @@
       break;
   }
   return NoChange();
 }
 
 
 MaybeHandle<Context> JSContextSpecialization::GetSpecializationContext(
     Node* node) {
   DCHECK(node->opcode() == IrOpcode::kJSLoadContext ||
          node->opcode() == IrOpcode::kJSStoreContext);
-  Node* const object = NodeProperties::GetValueInput(node, 0);
+  Node* const object = NodeProperties::GetContextInput(node);
   return NodeProperties::GetSpecializationContext(object, context());
 }
 
 
 Reduction JSContextSpecialization::ReduceJSLoadContext(Node* node) {
   DCHECK_EQ(IrOpcode::kJSLoadContext, node->opcode());
 
   // Get the specialization context from the node.
   Handle<Context> context;
   if (!GetSpecializationContext(node).ToHandle(&context)) return NoChange();
 
   // Find the right parent context.
   const ContextAccess& access = ContextAccessOf(node->op());
   for (size_t i = access.depth(); i > 0; --i) {
     context = handle(context->previous(), isolate());
   }
 
   // If the access itself is mutable, only fold-in the parent.
   if (!access.immutable()) {
     // The access does not have to look up a parent, nothing to fold.
     if (access.depth() == 0) {
       return NoChange();
     }
     const Operator* op = jsgraph_->javascript()->LoadContext(
         0, access.index(), access.immutable());
-    node->ReplaceInput(0, jsgraph_->Constant(context));
+    NodeProperties::ReplaceContextInput(node, jsgraph_->Constant(context));
     NodeProperties::ChangeOp(node, op);
     return Changed(node);
   }
   Handle<Object> value =
       handle(context->get(static_cast<int>(access.index())), isolate());
 
   // Even though the context slot is immutable, the context might have escaped
   // before the function to which it belongs has initialized the slot.
   // We must be conservative and check if the value in the slot is currently the
   // hole or undefined. If it is neither of these, then it must be initialized.
@@ skipping 21 matching lines @@
   const ContextAccess& access = ContextAccessOf(node->op());
   if (access.depth() == 0) {
     return NoChange();
   }
 
   // Find the right parent context.
   for (size_t i = access.depth(); i > 0; --i) {
     context = handle(context->previous(), isolate());
   }
 
-  node->ReplaceInput(0, jsgraph_->Constant(context));
+  NodeProperties::ReplaceContextInput(node, jsgraph_->Constant(context));
   NodeProperties::ChangeOp(node, javascript()->StoreContext(0, access.index()));
   return Changed(node);
 }
 
 
 Isolate* JSContextSpecialization::isolate() const {
   return jsgraph()->isolate();
 }
 
 
 JSOperatorBuilder* JSContextSpecialization::javascript() const {
   return jsgraph()->javascript();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8