TurboFan: Introduce TaggedSigned and TaggedPointer representations.

src/compiler/representation-change.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/representation-change.h"
 
 #include <sstream>
 
 #include "src/base/bits.h"
 #include "src/code-factory.h"
@@ skipping 123 matching lines @@
     if (IsWord(use_info.representation()) && IsWord(output_rep)) {
       // Both are words less than or equal to 32-bits.
       // Since loads of integers from memory implicitly sign or zero extend the
       // value to the full machine word size and stores implicitly truncate,
       // no representation change is necessary.
       return node;
     }
   }
 
   switch (use_info.representation()) {
+    case MachineRepresentation::kTaggedSigned:
+    case MachineRepresentation::kTaggedPointer:
     case MachineRepresentation::kTagged:
       DCHECK(use_info.type_check() == TypeCheckKind::kNone);
       return GetTaggedRepresentationFor(node, output_rep, output_type);
     case MachineRepresentation::kFloat32:
       DCHECK(use_info.type_check() == TypeCheckKind::kNone);
       return GetFloat32RepresentationFor(node, output_rep, output_type,
                                          use_info.truncation());
     case MachineRepresentation::kFloat64:
       return GetFloat64RepresentationFor(node, output_rep, output_type,
                                          use_node, use_info);
@@ skipping 665 matching lines @@
 }
 
 Node* RepresentationChanger::InsertChangeTaggedToFloat64(Node* node) {
   return jsgraph()->graph()->NewNode(simplified()->ChangeTaggedToFloat64(),
                                      node);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8