-fvar-tracking vs -fvar-tracking-assignments

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Hi.

I am wondering, if I should add -fvar-tracking-assignments switch or
not. From the documentation for the two switches, I gather that
-fvar-tracking is enabled on any optimization level. But it is not clear
from -fvar-tracking-assignments documentation whether it is implied by
-fvar-tracking (which is implied by optimization level) or whether I
should add -fvar-tracking-assignments separately to my command line?

So, does -fvar-tracking imply -fvar-tracking-assignments or not?

-- 
VZ

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