Transforms/InstCombine/InstCombineVectorOps.cpp

1136   Value* newLHS = LHS;
1141       newLHS = LHSOp0;
1146       newLHS = LHSOp0;
1155     newLHS = LHSOp0;
1159   if (newLHS == LHS && newRHS == RHS)
1164   if (newLHS != LHS)
1169   unsigned newLHSWidth = (newLHS != LHS) ? LHSOp0Width : LHSWidth;
1185       if (newLHS != LHS) {
1217       // If newRHS == newLHS, we want to remap any references from newRHS to
1218       // newLHS so that we can properly identify splats that may occur due to
1220       if (eltMask >= 0 && newRHS != nullptr && newLHS != newRHS)
1246       newRHS = UndefValue::get(newLHS->getType());
1247     return new ShuffleVectorInst(newLHS, newRHS, ConstantVector::get(Elts));
1254   if (isLHSID && VWidth == LHSOp0Width) return ReplaceInstUsesWith(SVI, newLHS);