[runtime] Introduce dedicated JSBoundFunction to represent bound functions.

src/arm/code-stubs-arm.cc

 // 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.
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 1328 matching lines @@
   __ bind(&fast_case);
   __ JumpIfSmi(function, &slow_case);
   __ CompareObjectType(function, function_map, scratch, JS_FUNCTION_TYPE);
   __ b(ne, &slow_case);
 
   // Ensure that {function} has an instance prototype.
   __ ldrb(scratch, FieldMemOperand(function_map, Map::kBitFieldOffset));
   __ tst(scratch, Operand(1 << Map::kHasNonInstancePrototype));
   __ b(ne, &slow_case);
 
-  // Ensure that {function} is not bound.
-  Register const shared_info = scratch;
-  __ ldr(shared_info,
-         FieldMemOperand(function, JSFunction::kSharedFunctionInfoOffset));
-  __ ldr(scratch, FieldMemOperand(shared_info,
-                                  SharedFunctionInfo::kCompilerHintsOffset));
-  __ tst(scratch,
-         Operand(Smi::FromInt(1 << SharedFunctionInfo::kBoundFunction)));
-  __ b(ne, &slow_case);
-
   // Get the "prototype" (or initial map) of the {function}.
   __ ldr(function_prototype,
          FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset));
   __ AssertNotSmi(function_prototype);
 
   // Resolve the prototype if the {function} has an initial map.  Afterwards the
   // {function_prototype} will be either the JSReceiver prototype object or the
   // hole value, which means that no instances of the {function} were created so
   // far and hence we should return false.
   Label function_prototype_valid;
@@ skipping 4031 matching lines @@
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM