Add a kSimd128 machine type for Turbofan.

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

Index: src/compiler/arm/instruction-selector-arm.cc
diff --git a/src/compiler/arm/instruction-selector-arm.cc b/src/compiler/arm/instruction-selector-arm.cc
index 81341e0284ffba7068ba2e33c1b8d908c446ffb7..14b30b1af08dbdfc0c0d6d52a8da8aecf1eccef0 100644
--- a/src/compiler/arm/instruction-selector-arm.cc
+++ b/src/compiler/arm/instruction-selector-arm.cc
@@ -327,8 +327,9 @@ void InstructionSelector::VisitLoad(Node* node) {
     case MachineRepresentation::kWord32:
       opcode = kArmLdr;
       break;
-    case MachineRepresentation::kNone:  // Fall through.
-    case MachineRepresentation::kWord64:
+    case MachineRepresentation::kWord64:   // Fall through.
+    case MachineRepresentation::kSimd128:  // Fall through.
+    case MachineRepresentation::kNone:
       UNREACHABLE();
       return;
   }
@@ -412,8 +413,9 @@ void InstructionSelector::VisitStore(Node* node) {
       case MachineRepresentation::kWord32:
         opcode = kArmStr;
         break;
-      case MachineRepresentation::kNone:  // Fall through.
-      case MachineRepresentation::kWord64:
+      case MachineRepresentation::kWord64:   // Fall through.
+      case MachineRepresentation::kSimd128:  // Fall through.
+      case MachineRepresentation::kNone:
         UNREACHABLE();
         return;
     }
@@ -452,9 +454,10 @@ void InstructionSelector::VisitCheckedLoad(Node* node) {
     case MachineRepresentation::kFloat64:
       opcode = kCheckedLoadFloat64;
       break;
-    case MachineRepresentation::kBit:     // Fall through.
-    case MachineRepresentation::kTagged:  // Fall through.
-    case MachineRepresentation::kWord64:  // Fall through.
+    case MachineRepresentation::kBit:      // Fall through.
+    case MachineRepresentation::kTagged:   // Fall through.
+    case MachineRepresentation::kWord64:   // Fall through.
+    case MachineRepresentation::kSimd128:  // Fall through.
     case MachineRepresentation::kNone:
       UNREACHABLE();
       return;
@@ -493,9 +496,10 @@ void InstructionSelector::VisitCheckedStore(Node* node) {
     case MachineRepresentation::kFloat64:
       opcode = kCheckedStoreFloat64;
       break;
-    case MachineRepresentation::kBit:     // Fall through.
-    case MachineRepresentation::kTagged:  // Fall through.
-    case MachineRepresentation::kWord64:  // Fall through.
+    case MachineRepresentation::kBit:      // Fall through.
+    case MachineRepresentation::kTagged:   // Fall through.
+    case MachineRepresentation::kWord64:   // Fall through.
+    case MachineRepresentation::kSimd128:  // Fall through.
     case MachineRepresentation::kNone:
       UNREACHABLE();
       return;