[turbofan] Introduce an ExternalPointer type.

test/unittests/compiler/node-test-utils.h

 // 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.
 
 #ifndef V8_UNITTESTS_COMPILER_NODE_TEST_UTILS_H_
 #define V8_UNITTESTS_COMPILER_NODE_TEST_UTILS_H_
 
 #include "src/compiler/machine-operator.h"
 #include "src/compiler/simplified-operator.h"
 #include "src/machine-type.h"
@@ skipping 75 matching lines @@
 Matcher<Node*> IsTypeGuard(const Matcher<Node*>& value_matcher,
                            const Matcher<Node*>& control_matcher);
 Matcher<Node*> IsExternalConstant(
     const Matcher<ExternalReference>& value_matcher);
 Matcher<Node*> IsHeapConstant(Handle<HeapObject> value);
 Matcher<Node*> IsFloat32Constant(const Matcher<float>& value_matcher);
 Matcher<Node*> IsFloat64Constant(const Matcher<double>& value_matcher);
 Matcher<Node*> IsInt32Constant(const Matcher<int32_t>& value_matcher);
 Matcher<Node*> IsInt64Constant(const Matcher<int64_t>& value_matcher);
 Matcher<Node*> IsNumberConstant(const Matcher<double>& value_matcher);
+Matcher<Node*> IsPointerConstant(const Matcher<intptr_t>& value_matcher);
 Matcher<Node*> IsSelect(const Matcher<MachineRepresentation>& type_matcher,
                         const Matcher<Node*>& value0_matcher,
                         const Matcher<Node*>& value1_matcher,
                         const Matcher<Node*>& value2_matcher);
 Matcher<Node*> IsPhi(const Matcher<MachineRepresentation>& type_matcher,
                      const Matcher<Node*>& value0_matcher,
                      const Matcher<Node*>& value1_matcher,
                      const Matcher<Node*>& merge_matcher);
 Matcher<Node*> IsPhi(const Matcher<MachineRepresentation>& type_matcher,
                      const Matcher<Node*>& value0_matcher,
@@ skipping 361 matching lines @@
                                const Matcher<Node*>& rhs_matcher);
 Matcher<Node*> IsWord32ReverseBytes(const Matcher<Node*>& value_matcher);
 
 Matcher<Node*> IsStackSlot();
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_UNITTESTS_COMPILER_NODE_TEST_UTILS_H_