Add a kSimd128 machine type for Turbofan.

src/compiler/x64/instruction-selector-x64.cc

Index: src/compiler/x64/instruction-selector-x64.cc
diff --git a/src/compiler/x64/instruction-selector-x64.cc b/src/compiler/x64/instruction-selector-x64.cc
index 96f8e32f8d607d7f95692bbeb4615137261da3a6..79d08160b1a0f0e58b8aff4ae6ebdc12f006b0f5 100644
--- a/src/compiler/x64/instruction-selector-x64.cc
+++ b/src/compiler/x64/instruction-selector-x64.cc
@@ -130,7 +130,8 @@ void InstructionSelector::VisitLoad(Node* node) {
       opcode = kX64Movl;
       break;
     case MachineRepresentation::kTagged:  // Fall through.
-    case MachineRepresentation::kWord64:
+    case MachineRepresentation::kWord64:  // Fall through.
+    case MachineRepresentation::kSimd128:

[titzer, 2016/02/17 11:57:02]

Probably want to make this case unreachable for now, since movq is only 8 bytes.

[bbudge, 2016/02/17 18:57:14]

Done.

       opcode = kX64Movq;
       break;
     case MachineRepresentation::kNone:
@@ -216,7 +217,8 @@ void InstructionSelector::VisitStore(Node* node) {
         opcode = kX64Movl;
         break;
       case MachineRepresentation::kTagged:  // Fall through.
-      case MachineRepresentation::kWord64:
+      case MachineRepresentation::kWord64:  // Fall through.
+      case MachineRepresentation::kSimd128:

[Jarin, 2016/02/17 12:06:47]

Preferably move this case to the unreachable case, movq seems wrong.

[bbudge, 2016/02/17 18:57:14]

Done.

         opcode = kX64Movq;
         break;
       case MachineRepresentation::kNone:
@@ -264,8 +266,9 @@ void InstructionSelector::VisitCheckedLoad(Node* node) {
     case MachineRepresentation::kFloat64:
       opcode = kCheckedLoadFloat64;
       break;
-    case MachineRepresentation::kBit:
-    case MachineRepresentation::kTagged:
+    case MachineRepresentation::kBit:      // Fall through.
+    case MachineRepresentation::kSimd128:  // Fall through.
+    case MachineRepresentation::kTagged:   // Fall through.
     case MachineRepresentation::kNone:
       UNREACHABLE();
       return;
@@ -316,8 +319,9 @@ void InstructionSelector::VisitCheckedStore(Node* node) {
     case MachineRepresentation::kFloat64:
       opcode = kCheckedStoreFloat64;
       break;
-    case MachineRepresentation::kBit:
-    case MachineRepresentation::kTagged:
+    case MachineRepresentation::kBit:      // Fall through.
+    case MachineRepresentation::kSimd128:  // Fall through.
+    case MachineRepresentation::kTagged:   // Fall through.
     case MachineRepresentation::kNone:
       UNREACHABLE();
       return;