X87: TurboFan: Introduce TaggedSigned and TaggedPointer representations.

  port d941b52d (r38657)

  original commit message:
  These new representations aren't used yet.

BUG=

Review-Url: https://codereview.chromium.org/2277473004
Cr-Commit-Position: refs/heads/master@{#38849}

src/compiler/x87/instruction-selector-x87.cc

@@ -187,6 +187,8 @@ void InstructionSelector::VisitLoad(Node* node) {
     case MachineRepresentation::kWord16:
       opcode = load_rep.IsSigned() ? kX87Movsxwl : kX87Movzxwl;
       break;
+    case MachineRepresentation::kTaggedSigned:   // Fall through.
+    case MachineRepresentation::kTaggedPointer:  // Fall through.
     case MachineRepresentation::kTagged:         // Fall through.
     case MachineRepresentation::kWord32:
       opcode = kX87Movl;
@@ -271,6 +273,8 @@ void InstructionSelector::VisitStore(Node* node) {
       case MachineRepresentation::kWord16:
         opcode = kX87Movw;
         break;
+      case MachineRepresentation::kTaggedSigned:   // Fall through.
+      case MachineRepresentation::kTaggedPointer:  // Fall through.
       case MachineRepresentation::kTagged:         // Fall through.
       case MachineRepresentation::kWord32:
         opcode = kX87Movl;
@@ -334,6 +338,8 @@ void InstructionSelector::VisitCheckedLoad(Node* node) {
       opcode = kCheckedLoadFloat64;
       break;
     case MachineRepresentation::kBit:            // Fall through.
+    case MachineRepresentation::kTaggedSigned:   // Fall through.
+    case MachineRepresentation::kTaggedPointer:  // Fall through.
     case MachineRepresentation::kTagged:         // Fall through.
     case MachineRepresentation::kWord64:         // Fall through.
     case MachineRepresentation::kSimd128:        // Fall through.
@@ -381,6 +387,8 @@ void InstructionSelector::VisitCheckedStore(Node* node) {
       opcode = kCheckedStoreFloat64;
       break;
     case MachineRepresentation::kBit:            // Fall through.
+    case MachineRepresentation::kTaggedSigned:   // Fall through.
+    case MachineRepresentation::kTaggedPointer:  // Fall through.
     case MachineRepresentation::kTagged:         // Fall through.
     case MachineRepresentation::kWord64:         // Fall through.
     case MachineRepresentation::kSimd128:        // Fall through.