Small optimization for recursive calls: avoid dex cache.

Change-Id: I044757a2f06e535cdc1480c4fc8182b89635baf6
diff --git a/compiler/optimizing/code_generator_arm.h b/compiler/optimizing/code_generator_arm.h
index dd69e4d..4b03dff 100644
--- a/compiler/optimizing/code_generator_arm.h
+++ b/compiler/optimizing/code_generator_arm.h
@@ -247,9 +247,12 @@
 
   void ComputeSpillMask() OVERRIDE;
 
+  Label* GetFrameEntryLabel() { return &frame_entry_label_; }
+
  private:
   // Labels for each block that will be compiled.
   GrowableArray<Label> block_labels_;
+  Label frame_entry_label_;
   LocationsBuilderARM location_builder_;
   InstructionCodeGeneratorARM instruction_visitor_;
   ParallelMoveResolverARM move_resolver_;