[PATCH] ScopDetection: Only detect scops that have at least one read and one write

[Johannes Doerfert]

Hey Tobias,

do you kow how much we actually gain by your change? Why shouldn't we
keep (and delete) SCoPs that have no stores (or at least delete the
loads and let the other passes delete the rest)? Why shouldn't we look at
generating memset intrinsics for loops that only write?

Regarding the patch, could you please comment your member variables
(even though it's pretty obvious).

- Johannes

- F395774: msg-20533-84.dat <http://reviews.llvm.org/F395774>


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