[turbofan] Rewrite ToObject as TurboFan stub.

src/builtins/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.
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 2382 matching lines @@
       }
       __ bind(&convert_to_object);
       {
         // Convert receiver using ToObject.
         // TODO(bmeurer): Inline the allocation here to avoid building the frame
         // in the fast case? (fall back to AllocateInNewSpace?)
         FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
         __ SmiTag(r0);
         __ Push(r0, r1);
         __ mov(r0, r3);
+        __ Push(cp);
         ToObjectStub stub(masm->isolate());
         __ CallStub(&stub);
+        __ Pop(cp);
         __ mov(r3, r0);
         __ Pop(r0, r1);
         __ SmiUntag(r0);
       }
       __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset));
       __ bind(&convert_receiver);
     }
     __ str(r3, MemOperand(sp, r0, LSL, kPointerSizeLog2));
   }
   __ bind(&done_convert);
@@ skipping 504 matching lines @@
     __ bkpt(0);
   }
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM