[V8] Implement SIMD Boolean vector types to allow mask registers.

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 9a93b9450a440de816e266662d1a43c1c685aba1..33a35c1067f7fb91235e43eafc4e35f6bad63728 100644
--- a/src/compiler/x64/instruction-selector-x64.cc
+++ b/src/compiler/x64/instruction-selector-x64.cc
@@ -220,6 +220,9 @@ ArchOpcode GetLoadOpcode(LoadRepresentation load_rep) {
       opcode = kX64Movq;
       break;
     case MachineRepresentation::kSimd128:  // Fall through.
+    case MachineRepresentation::kSimdBool4:   // Fall through.
+    case MachineRepresentation::kSimdBool8:   // Fall through.
+    case MachineRepresentation::kSimdBool16:  // Fall through.
     case MachineRepresentation::kNone:
       UNREACHABLE();
       break;
@@ -252,6 +255,9 @@ ArchOpcode GetStoreOpcode(StoreRepresentation store_rep) {
       return kX64Movq;
       break;
     case MachineRepresentation::kSimd128:  // Fall through.
+    case MachineRepresentation::kSimdBool4:   // Fall through.
+    case MachineRepresentation::kSimdBool8:   // Fall through.
+    case MachineRepresentation::kSimdBool16:  // Fall through.
     case MachineRepresentation::kNone:
       UNREACHABLE();
       return kArchNop;
@@ -399,6 +405,9 @@ void InstructionSelector::VisitCheckedLoad(Node* node) {
       break;
     case MachineRepresentation::kBit:      // Fall through.
     case MachineRepresentation::kSimd128:  // Fall through.
+    case MachineRepresentation::kSimdBool4:      // Fall through.
+    case MachineRepresentation::kSimdBool8:      // Fall through.
+    case MachineRepresentation::kSimdBool16:     // Fall through.
     case MachineRepresentation::kTaggedSigned:   // Fall through.
     case MachineRepresentation::kTaggedPointer:  // Fall through.
     case MachineRepresentation::kTagged:   // Fall through.
@@ -454,6 +463,9 @@ void InstructionSelector::VisitCheckedStore(Node* node) {
       break;
     case MachineRepresentation::kBit:      // Fall through.
     case MachineRepresentation::kSimd128:  // Fall through.
+    case MachineRepresentation::kSimdBool4:      // Fall through.
+    case MachineRepresentation::kSimdBool8:      // Fall through.
+    case MachineRepresentation::kSimdBool16:     // Fall through.
     case MachineRepresentation::kTaggedSigned:   // Fall through.
     case MachineRepresentation::kTaggedPointer:  // Fall through.
     case MachineRepresentation::kTagged:   // Fall through.