138 // of the loop (ie, they are known on the 4th iteration, so peel 3 iterations).
139 // The first iteration has g(0), g(0); the second has g(0), g(5); the
142 //   %a is a phi with constants so it is determined after iteration 1.
144 //     the iteration after %a is determined, so iteration 2.
146 //     the iteration after %y, so iteration 3.
203 //           %x = phi(0, %a) <-- becomes invariant starting from 3rd iteration.
295   // dereferenceable in the loop if the first iteration is peeled off. Also  in peelToTurnInvariantLoadsDerefencebale()
391     // independently of the loop iteration.  in countToEliminateCompares()
435     // iteration. See if that makes !Pred become unknown again.  in countToEliminateCompares()
443         return; // Need to peel one more iteration, but can't. Give up.  in countToEliminateCompares()
571   // Check that we can peel at least one iteration.  in computePeelCount()
614                         << " iteration(s) to turn"  in computePeelCount()
663   // Weights for current iteration.
665   // Weights to subtract after each iteration.
670 /// iteration.
676 /// For I-th (counting from 0) peeled off iteration we set the weights for
730       // Subtract exit weights on each iteration, distributed across all  in initBranchWeights()
742 /// \param IterNumber The serial number of the iteration currently being
749 /// instructions in the last peeled-off iteration.
786         // VMap must contain entry for IDom, as the iteration order is RPO.  in cloneLoopBlocks()
809   // the original loop preheader (for the first iteration) or the previous  in cloneLoopBlocks()
810   // iteration's exiting block (for every other iteration)  in cloneLoopBlocks()
816   // header (for the last peeled iteration) or the copied header of the next  in cloneLoopBlocks()
817   // iteration (for every other iteration)  in cloneLoopBlocks()
830   // loop iteration. Since this copy is no longer part of the loop, we  in cloneLoopBlocks()
832   // For the first iteration, we use the value from the preheader directly.  in cloneLoopBlocks()
833   // For any other iteration, we replace the phi with the value generated by  in cloneLoopBlocks()
835   // the previous iteration).  in cloneLoopBlocks()
851   // Fix up the outgoing values - we need to add a value for the iteration  in cloneLoopBlocks()
910 /// Rather, each iteration is peeled off separately, and needs to check the
959   // Peeling the first iteration transforms.  in peelLoop()
981   // Each following iteration will split the current bottom anchor in two,  in peelLoop()
983   // after peeling another iteration from the example above, we'll split  in peelLoop()
1019   // loop, the associated metadata must be cloned for each iteration.  in peelLoop()
1023   // For each peeled-off iteration, make a copy of the loop.  in peelLoop()
1032     // Remap to use values from the current iteration instead of the  in peelLoop()
1064   // from the last peeled-off iteration instead of the preheader.  in peelLoop()