[turbofan] Introduce an ExternalPointer type.

src/compiler/common-operator.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/common-operator.h"
 
 #include "src/assembler.h"
 #include "src/base/lazy-instance.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/opcodes.h"
@@ skipping 862 matching lines @@
 
 
 const Operator* CommonOperatorBuilder::NumberConstant(volatile double value) {
   return new (zone()) Operator1<double>(           // --
       IrOpcode::kNumberConstant, Operator::kPure,  // opcode
       "NumberConstant",                            // name
       0, 0, 0, 1, 0, 0,                            // counts
       value);                                      // parameter
 }
 
+const Operator* CommonOperatorBuilder::PointerConstant(intptr_t value) {
+  return new (zone()) Operator1<intptr_t>(          // --
+      IrOpcode::kPointerConstant, Operator::kPure,  // opcode
+      "PointerConstant",                            // name
+      0, 0, 0, 1, 0, 0,                             // counts
+      value);                                       // parameter
+}
 
 const Operator* CommonOperatorBuilder::HeapConstant(
     const Handle<HeapObject>& value) {
   return new (zone()) Operator1<Handle<HeapObject>>(  // --
       IrOpcode::kHeapConstant, Operator::kPure,       // opcode
       "HeapConstant",                                 // name
       0, 0, 0, 1, 0, 0,                               // counts
       value);                                         // parameter
 }
 
@@ skipping 236 matching lines @@
 CommonOperatorBuilder::CreateFrameStateFunctionInfo(
     FrameStateType type, int parameter_count, int local_count,
     Handle<SharedFunctionInfo> shared_info) {
   return new (zone()->New(sizeof(FrameStateFunctionInfo)))
       FrameStateFunctionInfo(type, parameter_count, local_count, shared_info);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8