Add a kSimd128 machine type for Turbofan.

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

Index: src/compiler/mips/instruction-selector-mips.cc
diff --git a/src/compiler/mips/instruction-selector-mips.cc b/src/compiler/mips/instruction-selector-mips.cc
index 9a1867029b4c8d839422108ca568057dfb368bed..c40b175db2ccf76fd8daee3fa0d564844decbaa6 100644
--- a/src/compiler/mips/instruction-selector-mips.cc
+++ b/src/compiler/mips/instruction-selector-mips.cc
@@ -151,7 +151,8 @@ void InstructionSelector::VisitLoad(Node* node) {
     case MachineRepresentation::kWord32:
       opcode = kMipsLw;
       break;
-    case MachineRepresentation::kWord64:  // Fall through.
+    case MachineRepresentation::kWord64:   // Fall through.
+    case MachineRepresentation::kSimd128:  // Fall through.
     case MachineRepresentation::kNone:
       UNREACHABLE();
       return;
@@ -231,7 +232,8 @@ void InstructionSelector::VisitStore(Node* node) {
       case MachineRepresentation::kWord32:
         opcode = kMipsSw;
         break;
-      case MachineRepresentation::kWord64:  // Fall through.
+      case MachineRepresentation::kWord64:   // Fall through.
+      case MachineRepresentation::kSimd128:  // Fall through.
       case MachineRepresentation::kNone:
         UNREACHABLE();
         return;
@@ -895,9 +897,10 @@ 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;