llvm-project

8d5b7d4d - [InstCombine] Use m_Poison() instead of m_Undef() (NFCI)

[InstCombine] Use m_Poison() instead of m_Undef() (NFCI) In this case, the isIdentityWithExtract() checks should already guarantee that these are single-source shuffles, so this is just for clarity.