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@@ -3992,7 +3992,7 @@ compilation we do not know which way the branch will go, so we do not
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know which of the successor's live-before set to use. The solution
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comes from the observation that there is no harm in identifying more
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variables as live than absolutely necessary. Thus, we can take the
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-union of the live-after sets from all the successors to be the
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+union of the live-before sets from all the successors to be the
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live-after set for the block. Once we have computed the live-after
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set, we can proceed to perform liveness analysis on the block just as
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we did in Section~\ref{sec:liveness-analysis-r1}.
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Jeremy Siek