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CLA代码被优化

user6523795
Prodigy 40 points


f_x2 = f_x1;
f_x1 = f_x0;
f_x0 = st_UGrid3S2R.f_C;

上述代码在CPU中执行，f_x1比f_x0慢1拍，f_x2比f_x0慢2拍，但在CLA中执行的时候f_x2始终和f_x0相等，感觉是代码被CLA优化了，如何避免这种优化？本人已尝试给这几个变量定义都加了关键字volatile，还是不行。