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Commit ed0e8d44 authored by Dan Gohman's avatar Dan Gohman
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When unfolding a load during scheduling, the new operator node has

a data dependency on the load node, so it really needs a
data-dependence edge to the load node, even if the load previously
existed.

And add a few comments.

llvm-svn: 67554
parent 673a4eef
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