Turn Function.prototype.bind into a hydrogen stub optimized for the common case

src/crankshaft/hydrogen-instructions.h

 // Copyright 2012 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.
 
 #ifndef V8_CRANKSHAFT_HYDROGEN_INSTRUCTIONS_H_
 #define V8_CRANKSHAFT_HYDROGEN_INSTRUCTIONS_H_
 
 #include <cstring>
 #include <iosfwd>
 
@@ skipping 2768 matching lines @@
   Unique<HeapObject> object_;
   bool object_in_new_space_;
 };
 
 
 class HCheckInstanceType final : public HUnaryOperation {
  public:
   enum Check {
     IS_JS_RECEIVER,
     IS_JS_ARRAY,
+    IS_JS_FUNCTION,
     IS_JS_DATE,
     IS_STRING,
     IS_INTERNALIZED_STRING,
     LAST_INTERVAL_CHECK = IS_JS_DATE
   };
 
   DECLARE_INSTRUCTION_FACTORY_P2(HCheckInstanceType, HValue*, Check);
 
   std::ostream& PrintDataTo(std::ostream& os) const override;  // NOLINT
 
   Representation RequiredInputRepresentation(int index) override {
     return Representation::Tagged();
   }
 
   HType CalculateInferredType() override {
     switch (check_) {
       case IS_JS_RECEIVER: return HType::JSReceiver();
       case IS_JS_ARRAY: return HType::JSArray();
+      case IS_JS_FUNCTION:
+        return HType::JSObject();
       case IS_JS_DATE: return HType::JSObject();
       case IS_STRING: return HType::String();
       case IS_INTERNALIZED_STRING: return HType::String();
     }
     UNREACHABLE();
     return HType::Tagged();
   }
 
   HValue* Canonicalize() override;
 
@@ skipping 2741 matching lines @@
   static HObjectAccess ForCounter() {
     return HObjectAccess(kExternalMemory, 0, Representation::Integer32(),
                          Handle<Name>::null(), false, false);
   }
 
   static HObjectAccess ForExternalUInteger8() {
     return HObjectAccess(kExternalMemory, 0, Representation::UInteger8(),
                          Handle<Name>::null(), false, false);
   }
 
+  static HObjectAccess ForBoundTargetFunction() {
+    return HObjectAccess(kInobject,
+                         JSBoundFunction::kBoundTargetFunctionOffset);
+  }
+
+  static HObjectAccess ForBoundThis() {
+    return HObjectAccess(kInobject, JSBoundFunction::kBoundThisOffset);
+  }
+
+  static HObjectAccess ForBoundArguments() {
+    return HObjectAccess(kInobject, JSBoundFunction::kBoundArgumentsOffset);
+  }
+
   // Create an access to an offset in a fixed array header.
   static HObjectAccess ForFixedArrayHeader(int offset);
 
   // Create an access to an in-object property in a JSObject.
   // This kind of access must be used when the object |map| is known and
   // in-object properties are being accessed. Accesses of the in-object
   // properties can have different semantics depending on whether corresponding
   // property was added to the map or not.
   static HObjectAccess ForMapAndOffset(Handle<Map> map, int offset,
       Representation representation = Representation::Tagged());
@@ skipping 1582 matching lines @@
   bool IsDeletable() const override { return true; }
 };
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_HYDROGEN_INSTRUCTIONS_H_