175         LLVM_DEBUG(dbgs() << "Found use of outer induction variable: "; U->dump());  in checkOuterInductionPhiUsers()
469   // All PHIs in the inner and outer headers must either be:  in checkPHIs()
472   // - An outer header PHI with all incoming values from outside the loop.  in checkPHIs()
475   // - Pairs of PHIs in the inner and outer headers, which implement a  in checkPHIs()
479   // The set of PHI nodes in the outer loop header that we know will still be  in checkPHIs()
504     // The incoming value from the outer loop must be the PHI node in the  in checkPHIs()
505     // outer loop header, with no modifications made in the top of the outer  in checkPHIs()
509       LLVM_DEBUG(dbgs() << "value modified in top of outer loop\n");  in checkPHIs()
514     // modifications in the tail end of the outer loop. We are in LCSSA form,  in checkPHIs()
534     LLVM_DEBUG(dbgs() << "  Outer: "; OuterPHI->dump());  in checkPHIs()
543       LLVM_DEBUG(dbgs() << "found unsafe PHI in outer loop: "; OuterPHI.dump());  in checkPHIs()
556   // Check for instructions in the outer but not inner loop. If any of these  in checkOuterLoopInsts()
574       // The execution count of the outer loop's iteration instructions  in checkOuterLoopInsts()
586       // Multiplies of the outer iteration variable and inner iteration  in checkOuterLoopInsts()
600   // Bail out if flattening the loops would cause instructions in the outer  in checkOuterLoopInsts()
622   // expected pattern, recording the uses of the outer IV.  in checkIVUsers()
627   // Check that there are no uses of the outer IV other than the ones found  in checkIVUsers()
714   // Both of the loop trip count values must be invariant in the outer loop  in CanFlattenLoopPair()
721     LLVM_DEBUG(dbgs() << "outer loop trip count not invariant\n");  in CanFlattenLoopPair()
737   // or outer induction variable. If there were, we could still do this  in CanFlattenLoopPair()
758     Remark << "Flattened into outer loop";  in DoFlattenLoopPair()
779   // Modify the trip count of the outer loop to be the product of the two  in DoFlattenLoopPair()
809       // When the base of the GEP doesn't dominate the outer induction phi then  in DoFlattenLoopPair()
825   // deleted, and invalidate any outer loop information.  in DoFlattenLoopPair()
910       dbgs() << "Loop flattening running on outer loop "  in FlattenLoopPair()