[turbofan] Introduce initial support for TypedArrays.

src/compiler/effect-control-linearizer.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/effect-control-linearizer.h"
 
 #include "src/code-factory.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/linkage.h"
@@ skipping 704 matching lines @@
       break;
     case IrOpcode::kPlainPrimitiveToWord32:
       state = LowerPlainPrimitiveToWord32(node, *effect, *control);
       break;
     case IrOpcode::kPlainPrimitiveToFloat64:
       state = LowerPlainPrimitiveToFloat64(node, *effect, *control);
       break;
     case IrOpcode::kTransitionElementsKind:
       state = LowerTransitionElementsKind(node, *effect, *control);
       break;
+    case IrOpcode::kLoadTypedElement:
+      state = LowerLoadTypedElement(node, *effect, *control);
+      break;
+    case IrOpcode::kStoreTypedElement:
+      state = LowerStoreTypedElement(node, *effect, *control);
+      break;
     default:
       return false;
   }
   NodeProperties::ReplaceUses(node, state.value, state.effect, state.control);
   *effect = state.effect;
   *control = state.control;
   return true;
 }
 
 EffectControlLinearizer::ValueEffectControl
@@ skipping 1877 matching lines @@
   // Nothing to do if the {object} doesn't have the {source_map}.
   Node* if_false = graph()->NewNode(common()->IfFalse(), branch);
   Node* efalse = effect;
 
   control = graph()->NewNode(common()->Merge(2), if_true, if_false);
   effect = graph()->NewNode(common()->EffectPhi(2), etrue, efalse, control);
 
   return ValueEffectControl(nullptr, effect, control);
 }
 
+EffectControlLinearizer::ValueEffectControl
+EffectControlLinearizer::LowerLoadTypedElement(Node* node, Node* effect,
+                                               Node* control) {
+  ExternalArrayType array_type = ExternalArrayTypeOf(node->op());
+  Node* buffer = node->InputAt(0);
+  Node* base = node->InputAt(1);
+  Node* external = node->InputAt(2);
+  Node* index = node->InputAt(3);
+
+  // We need to keep the {buffer} alive so that the GC will not release the
+  // ArrayBuffer (if there's any) as long as we are still operating on it.
+  effect = graph()->NewNode(common()->Retain(), buffer, effect);
+
+  // Compute the effective storage pointer.
+  Node* storage = effect = graph()->NewNode(machine()->UnsafePointerAdd(), base,
+                                            external, effect, control);
+
+  // Perform the actual typed element access.
+  Node* value = effect = graph()->NewNode(
+      simplified()->LoadElement(
+          AccessBuilder::ForTypedArrayElement(array_type, true)),
+      storage, index, effect, control);
+
+  return ValueEffectControl(value, effect, control);
+}
+
+EffectControlLinearizer::ValueEffectControl
+EffectControlLinearizer::LowerStoreTypedElement(Node* node, Node* effect,
+                                                Node* control) {
+  ExternalArrayType array_type = ExternalArrayTypeOf(node->op());
+  Node* buffer = node->InputAt(0);
+  Node* base = node->InputAt(1);
+  Node* external = node->InputAt(2);
+  Node* index = node->InputAt(3);
+  Node* value = node->InputAt(4);
+
+  // We need to keep the {buffer} alive so that the GC will not release the
+  // ArrayBuffer (if there's any) as long as we are still operating on it.
+  effect = graph()->NewNode(common()->Retain(), buffer, effect);
+
+  // Compute the effective storage pointer.
+  Node* storage = effect = graph()->NewNode(machine()->UnsafePointerAdd(), base,
+                                            external, effect, control);
+
+  // Perform the actual typed element access.
+  effect = graph()->NewNode(
+      simplified()->StoreElement(
+          AccessBuilder::ForTypedArrayElement(array_type, true)),
+      storage, index, value, effect, control);
+
+  return ValueEffectControl(nullptr, effect, control);
+}
+
 Factory* EffectControlLinearizer::factory() const {
   return isolate()->factory();
 }
 
 Isolate* EffectControlLinearizer::isolate() const {
   return jsgraph()->isolate();
 }
 
 Operator const* EffectControlLinearizer::ToNumberOperator() {
   if (!to_number_operator_.is_set()) {
     Callable callable = CodeFactory::ToNumber(isolate());
     CallDescriptor::Flags flags = CallDescriptor::kNoFlags;
     CallDescriptor* desc = Linkage::GetStubCallDescriptor(
         isolate(), graph()->zone(), callable.descriptor(), 0, flags,
         Operator::kNoThrow);
     to_number_operator_.set(common()->Call(desc));
   }
   return to_number_operator_.get();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8