[stubs] Unify (and optimize) implementation of ToObject.

src/arm/builtins-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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/codegen.h"
 #include "src/debug.h"
@@ skipping 1301 matching lines @@
     __ b(ge, &shift_arguments);
 
     __ bind(&convert_to_object);
 
     {
       // Enter an internal frame in order to preserve argument count.
       FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
       __ SmiTag(r0);
       __ push(r0);
 
-      __ push(r2);
-      __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
+      __ mov(r0, r2);
+      ToObjectStub stub(masm->isolate());
+      __ CallStub(&stub);
       __ mov(r2, r0);
 
       __ pop(r0);
       __ SmiUntag(r0);
 
       // Exit the internal frame.
     }
 
     // Restore the function to r1, and the flag to r4.
     __ ldr(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2));
@@ skipping 215 matching lines @@
 
     // Check if the receiver is already a JavaScript object.
     // r0: receiver
     STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE);
     __ CompareObjectType(r0, r1, r1, FIRST_SPEC_OBJECT_TYPE);
     __ b(ge, &push_receiver);
 
     // Convert the receiver to a regular object.
     // r0: receiver
     __ bind(&call_to_object);
-    __ push(r0);
-    __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
+    ToObjectStub stub(masm->isolate());
+    __ CallStub(&stub);
     __ b(&push_receiver);
 
     __ bind(&use_global_proxy);
     __ ldr(r0, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX));
     __ ldr(r0, FieldMemOperand(r0, GlobalObject::kGlobalProxyOffset));
 
     // Push the receiver.
     // r0: receiver
     __ bind(&push_receiver);
     __ push(r0);
@@ skipping 292 matching lines @@
   }
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM