llvm-project

378ac572 - Reland "[SelectionDAG] Introducing a new ISD::POISON SDNode to represent the poison value in the IR." (#135056)

Reland "[SelectionDAG] Introducing a new ISD::POISON SDNode to represent the poison value in the IR." (#135056) A new ISD::POISON SDNode is introduced to represent the poison value in the IR, replacing the previous use of ISD::UNDEF