[turbofan] Introduce initial support for TypedArrays.

src/compiler/typer.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/typer.h"
 
 #include "src/base/flags.h"
 #include "src/bootstrapper.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/graph-reducer.h"
@@ skipping 1957 matching lines @@
   }
   UNREACHABLE();
   return nullptr;
 }
 
 
 Type* Typer::Visitor::TypeLoadElement(Node* node) {
   return ElementAccessOf(node->op()).type;
 }
 
+Type* Typer::Visitor::TypeLoadTypedElement(Node* node) {
+  switch (ExternalArrayTypeOf(node->op())) {
+#define TYPED_ARRAY_CASE(ElemType, type, TYPE, ctype, size) \
+  case kExternal##ElemType##Array:                          \
+    return typer_->cache_.k##ElemType;
+    TYPED_ARRAYS(TYPED_ARRAY_CASE)
+#undef TYPED_ARRAY_CASE
+  }
+  UNREACHABLE();
+  return nullptr;
+}
 
 Type* Typer::Visitor::TypeStoreField(Node* node) {
   UNREACHABLE();
   return nullptr;
 }
 
 
 Type* Typer::Visitor::TypeStoreBuffer(Node* node) {
   UNREACHABLE();
   return nullptr;
 }
 
 
 Type* Typer::Visitor::TypeStoreElement(Node* node) {
   UNREACHABLE();
   return nullptr;
 }
 
+Type* Typer::Visitor::TypeStoreTypedElement(Node* node) {
+  UNREACHABLE();
+  return nullptr;
+}
+
 Type* Typer::Visitor::TypeObjectIsCallable(Node* node) {
   return TypeUnaryOp(node, ObjectIsCallable);
 }
 
 Type* Typer::Visitor::TypeObjectIsNumber(Node* node) {
   return TypeUnaryOp(node, ObjectIsNumber);
 }
 
 
 Type* Typer::Visitor::TypeObjectIsReceiver(Node* node) {
@@ skipping 13 matching lines @@
   return TypeUnaryOp(node, ObjectIsUndetectable);
 }
 
 
 // Machine operators.
 
 Type* Typer::Visitor::TypeDebugBreak(Node* node) { return Type::None(); }
 
 Type* Typer::Visitor::TypeComment(Node* node) { return Type::None(); }
 
+Type* Typer::Visitor::TypeRetain(Node* node) {
+  UNREACHABLE();
+  return nullptr;
+}
+
+Type* Typer::Visitor::TypeUnsafePointerAdd(Node* node) { return Type::None(); }
+
 Type* Typer::Visitor::TypeLoad(Node* node) { return Type::Any(); }
 
 Type* Typer::Visitor::TypeStackSlot(Node* node) { return Type::Any(); }
 
 Type* Typer::Visitor::TypeStore(Node* node) {
   UNREACHABLE();
   return nullptr;
 }
 
 
@@ skipping 630 matching lines @@
   }
   if (Type::IsInteger(*value)) {
     return Type::Range(value->Number(), value->Number(), zone());
   }
   return Type::Constant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8