Transforms/InstCombine/InstCombineCompares.cpp

179                                                    APInt& Min, APInt& Max) {
182          KnownZero.getBitWidth() == Max.getBitWidth() &&
183          "KnownZero, KnownOne and Min, Max must have equal bitwidth.");
189   Max = KnownOne|UnknownBits;
193     Max.clearBit(Max.getBitWidth()-1);
203                                                      APInt &Min, APInt &Max) {
206          KnownZero.getBitWidth() == Max.getBitWidth() &&
207          "Ty, KnownZero, KnownOne and Min, Max must have equal bitwidth.");
213   Max = KnownOne|UnknownBits;
2257     // in.  Compute the Min, Max and RHS values based on the known bits. For the
2273     // If Min and Max are known to be the same, then SimplifyDemandedBits
2275     // that code below can assume that Min != Max.