1 //===- LiveRangeCalc.cpp - Calculate live ranges -------------------------===//
68     assert(I.Value && "No live-in value found");  in updateFromLiveIns()
76       // The value is live-through, update LiveOut as well.  in updateFromLiveIns()
113 // live-out and live-in blocks.  The unique value optimization is not
196   // Block numbers where LR should be live-in.  in findReachingDefs()
228                << " needs to be live in to " << printMBBReference(*MBB)  in findReachingDefs()
229                << ", but is missing from the live-in list.\n";  in findReachingDefs()
237        // Is this a known live-out block?  in findReachingDefs()
250        // First time we see Pred.  Try to determine the live-out value, but set  in findReachingDefs()
251        // it as null if Pred is live-through with an unknown value.  in findReachingDefs()
264        // No, we need a live-in value for Pred as well  in findReachingDefs()
268           // Loopback to UseMBB, so value is really live through.  in findReachingDefs()
283   // If a unique reaching def was found, blit in the live ranges immediately.  in findReachingDefs()
290       // Trim the live range in UseMBB.  in findReachingDefs()
340     // Propagate live-out values down the dominator tree, inserting phi-defs  in updateSSA()
344       // Skip block if the live-in value has already been determined.  in updateSSA()
351       // We need a live-in value to a block with no immediate dominator?  in updateSSA()
356       // immediate dominator. Check if any of them have live-out values that are  in updateSSA()
392       // The value may be live-through even if Kill is set, as can happen when  in updateSSA()
427         // MBB is live-out and doesn't define its own value.  in updateSSA()