Remove data dependency of push/pop shadow frame.

Change-Id: I883a1082190084ddfa4a09b8953ac9dafa256e7e
diff --git a/src/compiler_llvm/method_compiler.h b/src/compiler_llvm/method_compiler.h
index 6de50ed..c912397 100644
--- a/src/compiler_llvm/method_compiler.h
+++ b/src/compiler_llvm/method_compiler.h
@@ -471,6 +471,7 @@
 
   llvm::AllocaInst* shadow_frame_;
   llvm::AllocaInst* jvalue_temp_;
+  llvm::Value* old_shadow_frame_;
 
   uint16_t elf_func_idx_;
 };