[turbofan] Introduce initial support for TypedArrays.

src/compiler/simplified-lowering.cc

 // Copyright 2014 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/simplified-lowering.h"
 
 #include <limits>
 
 #include "src/address-map.h"
 #include "src/base/bits.h"
@@ skipping 47 matching lines @@
   //     operators for some nodes, expanding some nodes to multiple nodes, or
   //     removing some (redundant) nodes.
   //     During this phase, use the {RepresentationChanger} to insert
   //     representation changes between uses that demand a particular
   //     representation and nodes that produce a different representation.
   LOWER
 };
 
 namespace {
 
+MachineRepresentation MachineRepresentationFromArrayType(
+    ExternalArrayType array_type) {
+  switch (array_type) {
+    case kExternalUint8Array:
+    case kExternalUint8ClampedArray:
+    case kExternalInt8Array:
+      return MachineRepresentation::kWord8;
+    case kExternalUint16Array:
+    case kExternalInt16Array:
+      return MachineRepresentation::kWord16;
+    case kExternalUint32Array:
+    case kExternalInt32Array:
+      return MachineRepresentation::kWord32;
+    case kExternalFloat32Array:
+      return MachineRepresentation::kFloat32;
+    case kExternalFloat64Array:
+      return MachineRepresentation::kFloat64;
+  }
+  UNREACHABLE();
+  return MachineRepresentation::kNone;
+}
 
 UseInfo TruncatingUseInfoFromRepresentation(MachineRepresentation rep) {
   switch (rep) {
     case MachineRepresentation::kTagged:
       return UseInfo::AnyTagged();
     case MachineRepresentation::kFloat64:
       return UseInfo::TruncatingFloat64();
     case MachineRepresentation::kFloat32:
       return UseInfo::TruncatingFloat32();
     case MachineRepresentation::kWord64:
@@ skipping 2124 matching lines @@
         SetOutput(node, MachineRepresentation::kNone);
         if (lower()) {
           if (write_barrier_kind < access.write_barrier_kind) {
             access.write_barrier_kind = write_barrier_kind;
             NodeProperties::ChangeOp(
                 node, jsgraph_->simplified()->StoreElement(access));
           }
         }
         return;
       }
+      case IrOpcode::kLoadTypedElement: {
+        MachineRepresentation const rep =
+            MachineRepresentationFromArrayType(ExternalArrayTypeOf(node->op()));
+        ProcessInput(node, 0, UseInfo::AnyTagged());         // buffer
+        ProcessInput(node, 1, UseInfo::AnyTagged());         // base pointer
+        ProcessInput(node, 2, UseInfo::PointerInt());        // external pointer
+        ProcessInput(node, 3, UseInfo::TruncatingWord32());  // index
+        ProcessRemainingInputs(node, 4);
+        SetOutput(node, rep);
+        return;
+      }
+      case IrOpcode::kStoreTypedElement: {
+        MachineRepresentation const rep =
+            MachineRepresentationFromArrayType(ExternalArrayTypeOf(node->op()));
+        ProcessInput(node, 0, UseInfo::AnyTagged());         // buffer
+        ProcessInput(node, 1, UseInfo::AnyTagged());         // base pointer
+        ProcessInput(node, 2, UseInfo::PointerInt());        // external pointer
+        ProcessInput(node, 3, UseInfo::TruncatingWord32());  // index
+        ProcessInput(node, 4,
+                     TruncatingUseInfoFromRepresentation(rep));  // value
+        ProcessRemainingInputs(node, 5);
+        SetOutput(node, MachineRepresentation::kNone);
+        return;
+      }
       case IrOpcode::kPlainPrimitiveToNumber: {
         if (InputIs(node, Type::Boolean())) {
           VisitUnop(node, UseInfo::Bool(), MachineRepresentation::kWord32);
           if (lower()) DeferReplacement(node, node->InputAt(0));
         } else if (InputIs(node, Type::String())) {
           VisitUnop(node, UseInfo::AnyTagged(), MachineRepresentation::kTagged);
           if (lower()) lowering->DoStringToNumber(node);
         } else if (truncation.IsUsedAsWord32()) {
           if (InputIs(node, Type::NumberOrOddball())) {
             VisitUnop(node, UseInfo::TruncatingWord32(),
@@ skipping 1350 matching lines @@
         isolate(), graph()->zone(), callable.descriptor(), 0, flags,
         Operator::kNoProperties);
     to_number_operator_.set(common()->Call(desc));
   }
   return to_number_operator_.get();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8