273   /// Discover induction and reduction PHIs in the header of \p L. Induction
289   /// Set of reduction PHIs taking part of a reduction across the inner and
705 // Check V's users to see if it is involved in a reduction in L.
707   // Reduction variables cannot be constants.  in findInnerReductionPhi()
717         // Detect floating point reduction only when it can be reordered.  in findInnerReductionPhi()
738       // PHIs in inner loops need to be part of a reduction in the outer loop,  in findInductionAndReductions()
749         // Check if we have a PHI node in the outer loop that has a reduction  in findInductionAndReductions()
757               << "Failed to recognize PHI as an induction or reduction.\n");  in findInductionAndReductions()
795         dbgs() << "Only outer loops with induction or reduction PHI nodes "  in currentLimitations()
801              << "Only outer loops with induction or reduction PHI nodes can be"  in currentLimitations()
809   // at all levels can be recognized as a induction or reduction phi. Bail out  in currentLimitations()
817           dbgs() << "Only inner loops with induction or reduction PHI nodes "  in currentLimitations()
823               << "Only inner loops with induction or reduction PHI nodes can be"  in currentLimitations()
856 // users are either reduction PHIs or PHIs outside the outer loop (which means
863     // Reduction lcssa phi will have only 1 incoming block that from loop latch.  in areInnerLoopExitPHIsSupported()
1452   // in the exit block of the loop nest or the outer loop header (reduction  in moveLCSSAPhis()
1616   // Adjust reduction PHI's now that the incoming block has changed.  in adjustLoopBranches()
1654   // Now update the reduction PHIs in the inner and outer loop headers.  in adjustLoopBranches()
1664   // Now move the remaining reduction PHIs from outer to inner loop header and  in adjustLoopBranches()
1665   // vice versa. The PHI nodes must be part of a reduction across the inner and  in adjustLoopBranches()
1668     LLVM_DEBUG(dbgs() << "Outer loop reduction PHIs:\n"; PHI->dump(););  in adjustLoopBranches()
1670     assert(OuterInnerReductions.count(PHI) && "Expected a reduction PHI node");  in adjustLoopBranches()
1673     LLVM_DEBUG(dbgs() << "Inner loop reduction PHIs:\n"; PHI->dump(););  in adjustLoopBranches()
1675     assert(OuterInnerReductions.count(PHI) && "Expected a reduction PHI node");  in adjustLoopBranches()