Support loads from primitive values.

This also changes load computation to use HeapTypes rather than Maps.
TODO: move conversion between maps and heaptypes earlier in the process, already in the oracle.

BUG=
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/147763006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18938 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/accessors.cc

@@ -91,10 +91,19 @@ static V8_INLINE bool CheckForName(Handle<String> name,
 }
 
 
-bool Accessors::IsJSObjectFieldAccessor(
-      Handle<Map> map, Handle<String> name,
-      int* object_offset) {
-  Isolate* isolate = map->GetIsolate();
+bool Accessors::IsJSObjectFieldAccessor(Handle<HeapType> type,
+                                        Handle<String> name,
+                                        int* object_offset) {
+  Isolate* isolate = name->GetIsolate();
+
+  if (type->Is(HeapType::String())) {
+    return CheckForName(name, isolate->heap()->length_string(),
+                        String::kLengthOffset, object_offset);
+  }
+
+  if (!type->IsClass()) return false;
+  Handle<Map> map = type->AsClass();
+
   switch (map->instance_type()) {
     case JS_ARRAY_TYPE:
       return
@@ -122,14 +131,8 @@ bool Accessors::IsJSObjectFieldAccessor(
                      JSDataView::kByteOffsetOffset, object_offset) ||
         CheckForName(name, isolate->heap()->buffer_string(),
                      JSDataView::kBufferOffset, object_offset);
-    default: {
-      if (map->instance_type() < FIRST_NONSTRING_TYPE) {
-        return
-          CheckForName(name, isolate->heap()->length_string(),
-                       String::kLengthOffset, object_offset);
-      }
+    default:
       return false;
-    }
   }
 }
 

src/accessors.h

@@ -89,8 +89,7 @@ class Accessors : public AllStatic {
   // Returns true for properties that are accessors to object fields.
   // If true, *object_offset contains offset of object field.
   static bool IsJSObjectFieldAccessor(
-      Handle<Map> map, Handle<String> name,
-      int* object_offset);
+      Handle<HeapType> map, Handle<String> name, int* object_offset);
 
 
  private:

src/hydrogen-instructions.h

@@ -4269,6 +4269,9 @@ class HIsStringAndBranch V8_FINAL : public HUnaryControlInstruction {
 
   DECLARE_CONCRETE_INSTRUCTION(IsStringAndBranch)
 
+ protected:
+  virtual int RedefinedOperandIndex() { return 0; }
+
  private:
   HIsStringAndBranch(HValue* value,
                      HBasicBlock* true_target = NULL,
@@ -4291,6 +4294,7 @@ class HIsSmiAndBranch V8_FINAL : public HUnaryControlInstruction {
 
  protected:
   virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; }
+  virtual int RedefinedOperandIndex() { return 0; }
 
  private:
   HIsSmiAndBranch(HValue* value,

src/hydrogen.h

@@ -2256,9 +2256,12 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
 
   class PropertyAccessInfo {
    public:
-    PropertyAccessInfo(Isolate* isolate, Handle<Map> map, Handle<String> name)
-        : lookup_(isolate),
-          map_(map),
+    PropertyAccessInfo(HOptimizedGraphBuilder* builder,
+                       Handle<HeapType> type,
+                       Handle<String> name)
+        : lookup_(builder->isolate()),
+          builder_(builder),
+          type_(type),
           name_(name),
           access_(HObjectAccess::ForMap()) { }
 
@@ -2275,32 +2278,48 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
     // PropertyAccessInfo is built for types->first().
     bool CanLoadAsMonomorphic(SmallMapList* types);
 
+    Handle<Map> map() {
+      if (type_->Is(HeapType::Number())) {
+        Context* context = current_info()->closure()->context();
+        context = context->native_context();
+        return handle(context->number_function()->initial_map());
+      } else if (type_->Is(HeapType::String())) {
+        Context* context = current_info()->closure()->context();
+        context = context->native_context();
+        return handle(context->string_function()->initial_map());
+      } else {
+        return type_->AsClass();
+      }
+    }
+    Handle<HeapType> type() const { return type_; }
+    Handle<String> name() const { return name_; }
+
     bool IsJSObjectFieldAccessor() {
       int offset;  // unused
-      return Accessors::IsJSObjectFieldAccessor(map_, name_, &offset);
+      return Accessors::IsJSObjectFieldAccessor(type_, name_, &offset);
     }
 
     bool GetJSObjectFieldAccess(HObjectAccess* access) {
-      if (IsStringLength()) {
-        *access = HObjectAccess::ForStringLength();
-        return true;
-      } else if (IsArrayLength()) {
-        *access = HObjectAccess::ForArrayLength(map_->elements_kind());
+      if (IsArrayLength()) {
+        *access = HObjectAccess::ForArrayLength(map()->elements_kind());
         return true;
-      } else {
-        int offset;
-        if (Accessors::IsJSObjectFieldAccessor(map_, name_, &offset)) {
+      }
+      int offset;
+      if (Accessors::IsJSObjectFieldAccessor(type_, name_, &offset)) {
+        if (type_->Is(HeapType::String())) {
+          ASSERT(name_->Equals(isolate()->heap()->length_string()));
+          *access = HObjectAccess::ForStringLength();
+        } else {
           *access = HObjectAccess::ForJSObjectOffset(offset);
-          return true;
         }
-        return false;
+        return true;
       }
+      return false;
     }
 
     bool has_holder() { return !holder_.is_null(); }
 
     LookupResult* lookup() { return &lookup_; }
-    Handle<Map> map() { return map_; }
     Handle<JSObject> holder() { return holder_; }
     Handle<JSFunction> accessor() { return accessor_; }
     Handle<Object> constant() { return constant_; }
@@ -2308,14 +2327,10 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
 
    private:
     Isolate* isolate() { return lookup_.isolate(); }
-
-    bool IsStringLength() {
-      return map_->instance_type() < FIRST_NONSTRING_TYPE &&
-          name_->Equals(isolate()->heap()->length_string());
-    }
+    CompilationInfo* current_info() { return builder_->current_info(); }
 
     bool IsArrayLength() {
-      return map_->instance_type() == JS_ARRAY_TYPE &&
+      return map()->instance_type() == JS_ARRAY_TYPE &&
           name_->Equals(isolate()->heap()->length_string());
     }
 
@@ -2330,7 +2345,8 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
     }
 
     LookupResult lookup_;
-    Handle<Map> map_;
+    HOptimizedGraphBuilder* builder_;
+    Handle<HeapType> type_;
     Handle<String> name_;
     Handle<JSObject> holder_;
     Handle<JSFunction> accessor_;
@@ -2340,7 +2356,7 @@ class HOptimizedGraphBuilder : public HGraphBuilder, public AstVisitor {
 
   HInstruction* BuildLoadMonomorphic(PropertyAccessInfo* info,
                                      HValue* object,
-                                     HInstruction* checked_object,
+                                     HValue* checked_object,
                                      BailoutId ast_id,
                                      BailoutId return_id,
                                      bool can_inline_accessor = true);

src/ic.cc

@@ -1208,9 +1208,9 @@ Handle<Code> LoadIC::CompileHandler(LookupResult* lookup,
       // Use simple field loads for some well-known callback properties.
       if (object->IsJSObject()) {
         Handle<JSObject> receiver = Handle<JSObject>::cast(object);
-        Handle<Map> map(receiver->map());
+        Handle<HeapType> type = IC::MapToType(handle(receiver->map()));
         int object_offset;
-        if (Accessors::IsJSObjectFieldAccessor(map, name, &object_offset)) {
+        if (Accessors::IsJSObjectFieldAccessor(type, name, &object_offset)) {
           return SimpleFieldLoad(object_offset / kPointerSize);
         }
       }

test/mjsunit/value-wrapper-accessor.js

+// Copyright 2014 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// When calling user-defined accessors on strings, booleans or
+// numbers, we should create a wrapper object in classic-mode.
+
+// Flags: --allow-natives-syntax
+
+function test(object, prototype) {
+  var result;
+  Object.defineProperty(prototype, "nonstrict", {
+    get: function() { result = this; },
+    set: function(v) { result = this; }
+  });
+  Object.defineProperty(prototype, "strict", {
+    get: function() { "use strict"; result = this; },
+    set: function(v) { "use strict"; result = this; }
+  });
+
+  (function() {
+    function nonstrict(s) {
+      return s.nonstrict;
+    }
+    function strict(s) {
+      return s.strict;
+    }
+
+    nonstrict(object);
+    nonstrict(object);
+    %OptimizeFunctionOnNextCall(nonstrict);
+    result = undefined;
+    nonstrict(object);
+    assertEquals("object", typeof result);
+
+    strict(object);
+    strict(object);
+    %OptimizeFunctionOnNextCall(strict);
+    result = undefined;
+    strict(object);
+    assertEquals(typeof object, typeof result);
+  })();
+
+  (function() {
+    function nonstrict(s) {
+      return s.nonstrict = 10;
+    }
+    function strict(s) {
+      return s.strict = 10;
+    }
+
+    nonstrict(object);
+    nonstrict(object);
+    %OptimizeFunctionOnNextCall(nonstrict);
+    result = undefined;
+    nonstrict(object);
+    // TODO(1475): Support storing to primitive values.
+    // This should return "object" once storing to primitive values is
+    // supported.
+    assertEquals("undefined", typeof result);
+
+    strict(object);
+    strict(object);
+    %OptimizeFunctionOnNextCall(strict);
+    result = undefined;
+    strict(object);
+    // TODO(1475): Support storing to primitive values.
+    // This should return "object" once storing to primitive values is
+    // supported.
+    assertEquals("undefined", typeof result);
+  })();
+}
+
+test(1, Number.prototype);
+test("string", String.prototype);
+test(true, Boolean.prototype);