[turbofan] Add support for JSArrayBufferView intrinsics.

src/compiler/js-intrinsic-lowering.cc

 // Copyright 2015 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/compiler/js-intrinsic-lowering.h"
 
 #include <stack>
 
 #include "src/code-factory.h"
 #include "src/compiler/access-builder.h"
@@ skipping 58 matching lines @@
     case Runtime::kInlineToNumber:
       return ReduceToNumber(node);
     case Runtime::kInlineToObject:
       return ReduceToObject(node);
     case Runtime::kInlineToString:
       return ReduceToString(node);
     case Runtime::kInlineCall:
       return ReduceCall(node);
     case Runtime::kInlineGetSuperConstructor:
       return ReduceGetSuperConstructor(node);
+    case Runtime::kInlineArrayBufferViewGetByteLength:
+      return ReduceArrayBufferViewField(
+          node, AccessBuilder::ForJSArrayBufferViewByteLength());
+    case Runtime::kInlineArrayBufferViewGetByteOffset:
+      return ReduceArrayBufferViewField(
+          node, AccessBuilder::ForJSArrayBufferViewByteOffset());
     case Runtime::kInlineMaxSmi:
       return ReduceMaxSmi(node);
+    case Runtime::kInlineTypedArrayGetLength:
+      return ReduceArrayBufferViewField(node,
+                                        AccessBuilder::ForJSTypedArrayLength());
     case Runtime::kInlineTypedArrayMaxSizeInHeap:
       return ReduceTypedArrayMaxSizeInHeap(node);
     case Runtime::kInlineJSCollectionGetTable:
       return ReduceJSCollectionGetTable(node);
     case Runtime::kInlineStringGetRawHashField:
       return ReduceStringGetRawHashField(node);
     case Runtime::kInlineTheHole:
       return ReduceTheHole(node);
     case Runtime::kInlineClassOf:
       return ReduceClassOf(node);
@@ skipping 223 matching lines @@
   Node* active_function = NodeProperties::GetValueInput(node, 0);
   Node* effect = NodeProperties::GetEffectInput(node);
   Node* control = NodeProperties::GetControlInput(node);
   Node* active_function_map = effect =
       graph()->NewNode(simplified()->LoadField(AccessBuilder::ForMap()),
                        active_function, effect, control);
   return Change(node, simplified()->LoadField(AccessBuilder::ForMapPrototype()),
                 active_function_map, effect, control);
 }
 
+Reduction JSIntrinsicLowering::ReduceArrayBufferViewField(
+    Node* node, FieldAccess const& access) {
+  Node* receiver = NodeProperties::GetValueInput(node, 0);
+  Node* effect = NodeProperties::GetEffectInput(node);
+  Node* control = NodeProperties::GetControlInput(node);
+
+  // Load the {receiver}s field.
+  Node* value = effect = graph()->NewNode(simplified()->LoadField(access),
+                                          receiver, effect, control);
+
+  // Check if the {receiver}s buffer was neutered.
+  Node* receiver_buffer = effect = graph()->NewNode(
+      simplified()->LoadField(AccessBuilder::ForJSArrayBufferViewBuffer()),
+      receiver, effect, control);
+  Node* check = effect = graph()->NewNode(
+      simplified()->ArrayBufferWasNeutered(), receiver_buffer, effect, control);
+
+  // Default to zero if the {receiver}s buffer was neutered.
+  value = graph()->NewNode(
+      common()->Select(MachineRepresentation::kTagged, BranchHint::kFalse),
+      check, jsgraph()->ZeroConstant(), value);
+
+  ReplaceWithValue(node, value, effect, control);
+  return Replace(value);
+}
+
 Reduction JSIntrinsicLowering::ReduceMaxSmi(Node* node) {
   Node* value = jsgraph()->Constant(Smi::kMaxValue);
   ReplaceWithValue(node, value);
   return Replace(value);
 }
 
 Reduction JSIntrinsicLowering::ReduceTypedArrayMaxSizeInHeap(Node* node) {
   Node* value = jsgraph()->Constant(FLAG_typed_array_max_size_in_heap);
   ReplaceWithValue(node, value);
   return Replace(value);
@@ skipping 92 matching lines @@
   return jsgraph_->javascript();
 }
 
 SimplifiedOperatorBuilder* JSIntrinsicLowering::simplified() const {
   return jsgraph()->simplified();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8