Revert of Remove SIMD.js from V8.

src/crankshaft/hydrogen-instructions.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/crankshaft/hydrogen-instructions.h"
 
 #include "src/base/bits.h"
 #include "src/base/ieee754.h"
 #include "src/base/safe_math.h"
 #include "src/codegen.h"
@@ skipping 1054 matching lines @@
 }
 
 
 std::ostream& HReturn::PrintDataTo(std::ostream& os) const {  // NOLINT
   return os << NameOf(value()) << " (pop " << NameOf(parameter_count())
             << " values)";
 }
 
 
 Representation HBranch::observed_input_representation(int index) {
-  if (expected_input_types_ &
-      (ToBooleanHint::kNull | ToBooleanHint::kReceiver |
-       ToBooleanHint::kString | ToBooleanHint::kSymbol)) {
+  if (expected_input_types_ & (ToBooleanHint::kNull | ToBooleanHint::kReceiver |
+                               ToBooleanHint::kString | ToBooleanHint::kSymbol |
+                               ToBooleanHint::kSimdValue)) {
     return Representation::Tagged();
   }
   if (expected_input_types_ & ToBooleanHint::kUndefined) {
     if (expected_input_types_ & ToBooleanHint::kHeapNumber) {
       return Representation::Double();
     }
     return Representation::Tagged();
   }
   if (expected_input_types_ & ToBooleanHint::kHeapNumber) {
     return Representation::Double();
@@ skipping 149 matching lines @@
         return heap->boolean_string();
       }
       if (unique.IsKnownGlobal(heap->null_value())) {
         return heap->object_string();
       }
       DCHECK(unique.IsKnownGlobal(heap->undefined_value()));
       return heap->undefined_string();
     }
     case SYMBOL_TYPE:
       return heap->symbol_string();
+    case SIMD128_VALUE_TYPE: {
+      Unique<Map> map = constant->ObjectMap();
+#define SIMD128_TYPE(TYPE, Type, type, lane_count, lane_type) \
+  if (map.IsKnownGlobal(heap->type##_map())) {                \
+    return heap->type##_string();                             \
+  }
+      SIMD128_TYPES(SIMD128_TYPE)
+#undef SIMD128_TYPE
+      UNREACHABLE();
+      return nullptr;
+    }
     default:
       if (constant->IsUndetectable()) return heap->undefined_string();
       if (constant->IsCallable()) return heap->function_string();
       return heap->object_string();
   }
 }
 
 }  // namespace
 
 
@@ skipping 2786 matching lines @@
     case HObjectAccess::kExternalMemory:
       os << "[external-memory]";
       break;
   }
 
   return os << "@" << access.offset();
 }
 
 }  // namespace internal
 }  // namespace v8