[simd.js] Single SIMD128_VALUE_TYPE for all Simd128Values.

src/runtime/runtime-simd.cc

Index: src/runtime/runtime-simd.cc
diff --git a/src/runtime/runtime-simd.cc b/src/runtime/runtime-simd.cc
index 3d050d89a6cccb0a117dfbc973b1a38fe758c0b9..bcf356702c5c09c1c494eba4c68dbece95cd03a7 100644
--- a/src/runtime/runtime-simd.cc
+++ b/src/runtime/runtime-simd.cc
@@ -155,7 +155,7 @@ RUNTIME_FUNCTION(Runtime_SimdEquals) {
   // args[1] is of unknown type.
   if (args[1]->IsSimd128Value()) {
     Simd128Value* b = Simd128Value::cast(args[1]);
-    if (a->map()->instance_type() == b->map()->instance_type()) {
+    if (a->map() == b->map()) {
       if (a->IsFloat32x4()) {
         result = Equals(Float32x4::cast(*a), Float32x4::cast(b));
       } else {
@@ -175,7 +175,7 @@ RUNTIME_FUNCTION(Runtime_SimdSameValue) {
   // args[1] is of unknown type.
   if (args[1]->IsSimd128Value()) {
     Simd128Value* b = Simd128Value::cast(args[1]);
-    if (a->map()->instance_type() == b->map()->instance_type()) {
+    if (a->map() == b->map()) {
       if (a->IsFloat32x4()) {
         result = Float32x4::cast(*a)->SameValue(Float32x4::cast(b));
       } else {
@@ -195,7 +195,7 @@ RUNTIME_FUNCTION(Runtime_SimdSameValueZero) {
   // args[1] is of unknown type.
   if (args[1]->IsSimd128Value()) {
     Simd128Value* b = Simd128Value::cast(args[1]);
-    if (a->map()->instance_type() == b->map()->instance_type()) {
+    if (a->map() == b->map()) {
       if (a->IsFloat32x4()) {
         result = Float32x4::cast(*a)->SameValueZero(Float32x4::cast(b));
       } else {