llvm-project

fe73a97a - [SelectionDAG] Deal with POISON for INSERT_VECTOR_ELT/INSERT_SUBVECTOR (part 2)

[SelectionDAG] Deal with POISON for INSERT_VECTOR_ELT/INSERT_SUBVECTOR (part 2) Add support in isGuaranteedNotToBeUndefOrPoison to avoid regressions seen after a previous commit fixing #141034.