[turbofan] Introduce an ExternalPointer type.

test/unittests/compiler/typer-unittest.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 <functional>
 
 #include "src/codegen.h"
 #include "src/compiler/js-operator.h"
 #include "src/compiler/node-properties.h"
 #include "src/compiler/operator-properties.h"
@@ skipping 355 matching lines @@
 TEST_BINARY_MONOTONICITY(ShiftLeft)
 TEST_BINARY_MONOTONICITY(ShiftRight)
 TEST_BINARY_MONOTONICITY(ShiftRightLogical)
 TEST_BINARY_MONOTONICITY(Add)
 TEST_BINARY_MONOTONICITY(Subtract)
 TEST_BINARY_MONOTONICITY(Multiply)
 TEST_BINARY_MONOTONICITY(Divide)
 TEST_BINARY_MONOTONICITY(Modulus)
 #undef TEST_BINARY_MONOTONICITY
 
-
-//------------------------------------------------------------------------------
-// Regression tests
-
-
-TEST_F(TyperTest, TypeRegressInt32Constant) {
-  int values[] = {-5, 10};
-  for (auto i : values) {
-    Node* c = graph()->NewNode(common()->Int32Constant(i));
-    Type* type = NodeProperties::GetType(c);
-    EXPECT_TRUE(type->Is(NewRange(i, i)));
-  }
-}
-
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8