TPDE is a framework for writing a back-end for various SSA IRs. TPDE-LLVM is an LLVM back-end written using TPDE, but TPDE itself is independent of LLVM. The pa

TPDE is a framework for writing a back-end for various SSA IRs. TPDE-LLVM is an LLVM back-end written using TPDE, but TPDE itself is independent of LLVM. The paper also mentions back-ends written for Cranelift's IR and Umbra IR using TPDE.