[turbofan] Turn common Guard operator into simplified TypeGuard.

src/compiler/js-intrinsic-lowering.cc

 // Copyright 2015 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-intrinsic-lowering.h"
 
 #include <stack>
 
 #include "src/code-factory.h"
 #include "src/compiler/access-builder.h"
@@ skipping 119 matching lines @@
   Revisit(graph()->end());
 
   node->TrimInputCount(0);
   NodeProperties::ChangeOp(node, common()->Dead());
   return Changed(node);
 }
 
 
 Reduction JSIntrinsicLowering::ReduceDoubleHi(Node* node) {
   // Tell the compiler to assume number input.
-  Node* renamed = graph()->NewNode(common()->Guard(Type::Number()),
+  Node* renamed = graph()->NewNode(simplified()->TypeGuard(Type::Number()),
                                    node->InputAt(0), graph()->start());
   node->ReplaceInput(0, renamed);
   return Change(node, machine()->Float64ExtractHighWord32());
 }
 
 
 Reduction JSIntrinsicLowering::ReduceDoubleLo(Node* node) {
   // Tell the compiler to assume number input.
-  Node* renamed = graph()->NewNode(common()->Guard(Type::Number()),
+  Node* renamed = graph()->NewNode(simplified()->TypeGuard(Type::Number()),
                                    node->InputAt(0), graph()->start());
   node->ReplaceInput(0, renamed);
   return Change(node, machine()->Float64ExtractLowWord32());
 }
 
 
 Reduction JSIntrinsicLowering::ReduceIsInstanceType(
     Node* node, InstanceType instance_type) {
   // if (%_IsSmi(value)) {
   //   return false;
@@ skipping 317 matching lines @@
 }
 
 
 SimplifiedOperatorBuilder* JSIntrinsicLowering::simplified() const {
   return jsgraph()->simplified();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8