[cfe-dev] Ho to instruct the optimizer to not throw out certain constructs

[Compiler Dragon via cfe-dev]

Hi *, 

I am currently writing a clang plugin, which add to specific functions for e.g. additional arguments. 

How can I instruct the optimizer not to throw out these arguments, because they are not used in the function body?

With (optnone) we can instruct the optimizer to not optimize the whole function. But this ist not what I want. The function body should be optimized like before.

Any idea or hints where to look?

Thanks

Marcel
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