[turbofan] Introduce an ExternalPointer type.

test/cctest/compiler/test-js-typed-lowering.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/compilation-dependencies.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-typed-lowering.h"
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/opcodes.h"
@@ skipping 151 matching lines @@
 
   Node* UseForEffect(Node* node) {
     Node* merge = graph.NewNode(common.Merge(1), start());
     return graph.NewNode(common.EffectPhi(1), node, merge);
   }
 
   void CheckEffectInput(Node* effect, Node* use) {
     CHECK_EQ(effect, NodeProperties::GetEffectInput(use));
   }
 
-  void CheckInt32Constant(int32_t expected, Node* result) {
-    CHECK_EQ(IrOpcode::kInt32Constant, result->opcode());
-    CHECK_EQ(expected, OpParameter<int32_t>(result));
-  }
-
   void CheckNumberConstant(double expected, Node* result) {
     CHECK_EQ(IrOpcode::kNumberConstant, result->opcode());
     CHECK_EQ(expected, OpParameter<double>(result));
   }
 
   void CheckNaN(Node* result) {
     CHECK_EQ(IrOpcode::kNumberConstant, result->opcode());
     double value = OpParameter<double>(result);
     CHECK(std::isnan(value));
   }
@@ skipping 500 matching lines @@
         }
       }
     }
   }
 }
 
 TEST(RemoveToNumberEffects) {
   JSTypedLoweringTester R;
 
   Node* effect_use = NULL;
-  Node* zero = R.graph.NewNode(R.common.Int32Constant(0));
+  Node* zero = R.graph.NewNode(R.common.NumberConstant(0));
   for (int i = 0; i < 10; i++) {
     Node* p0 = R.Parameter(Type::Number());
     Node* ton = R.Unop(R.javascript.ToNumber(), p0);
     Node* frame_state = R.EmptyFrameState(R.context());
     effect_use = NULL;
 
     switch (i) {
       case 0:
         CHECK_EQ(1, OperatorProperties::GetFrameStateInputCount(
                         R.javascript.ToNumber()));
@@ skipping 537 matching lines @@
           CHECK_EQ(p1, r->InputAt(1));
         }
       }
     }
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8