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831 /// \brief Determine which blocks the value is live in.
842 // where the def is live. Blocks are added to the worklist if we need to
849 // the value isn't really live-in.
856 // reference to the alloca is a def (store), then we know it isn't live-in.
863 // actually live-in here.
875 // live into this block.
881 // Now that we have a set of blocks where the phi is live-in, recursively add
882 // their predecessors until we find the full region the value is live.
886 // The block really is live in here, insert it into the set. If already in
891 // Since the value is live into BB, it is either defined in a predecessor or
892 // live into it to. Add the preds to the worklist unless they are a
897 // The value is not live into a predecessor if it defines the value.
927 // Determine which blocks the value is live in. These are blocks which lead