llvm-project

0fe9454c - [X86] Fold EXPAND(X,Y,M) -> SELECT(M,X,Y) when M is a lowest bit mask (#179630)

[X86] Fold EXPAND(X,Y,M) -> SELECT(M,X,Y) when M is a lowest bit mask (#179630) If a EXPAND node mask is just the lowest bits, then we can replace it with a more general SELECT node, which can be cheaper and potentially allow predication. Fixes #179008