llvm-project

a25eda2b - [mlir][scf] Modify the return logic of generateLoopNestUsingForOp (NFC) (#159394)

[mlir][scf] Modify the return logic of generateLoopNestUsingForOp (NFC) (#159394) When loops is empty, avoid executing yieldTiledValuesFn and Add a test which all tile sizes are set to zero.