[runtime] Introduce dedicated JSBoundFunction to represent bound functions.

src/arm64/macro-assembler-arm64.cc

 // Copyright 2013 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_ARM64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 1608 matching lines @@
 
     UseScratchRegisterScope temps(this);
     Register temp = temps.AcquireX();
 
     CompareObjectType(object, temp, temp, JS_FUNCTION_TYPE);
     Check(eq, kOperandIsNotAFunction);
   }
 }
 
 
+void MacroAssembler::AssertBoundFunction(Register object) {
+  if (emit_debug_code()) {
+    AssertNotSmi(object, kOperandIsASmiAndNotABoundFunction);
+
+    UseScratchRegisterScope temps(this);
+    Register temp = temps.AcquireX();
+
+    CompareObjectType(object, temp, temp, JS_BOUND_FUNCTION_TYPE);
+    Check(eq, kOperandIsNotABoundFunction);
+  }
+}
+
+
 void MacroAssembler::AssertUndefinedOrAllocationSite(Register object,
                                                      Register scratch) {
   if (emit_debug_code()) {
     Label done_checking;
     AssertNotSmi(object);
     JumpIfRoot(object, Heap::kUndefinedValueRootIndex, &done_checking);
     Ldr(scratch, FieldMemOperand(object, HeapObject::kMapOffset));
     CompareRoot(scratch, Heap::kAllocationSiteMapRootIndex);
     Assert(eq, kExpectedUndefinedOrCell);
     Bind(&done_checking);
@@ skipping 3220 matching lines @@
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64