llvm-project

e18a77cf - Revert "[SelectionDAG] Folding ZERO-EXTEND/SIGN_EXTEND poison to Poison value in getNode (#122741)"

Revert "[SelectionDAG] Folding ZERO-EXTEND/SIGN_EXTEND poison to Poison value in getNode (#122741)" This reverts commit f12078e72601e7c03e5d66afab034313caf8f791. Breaks `check-llvm`, see comments on https://github.com/llvm/llvm-project/pull/122741