Basically did
set(CMAKE_CXX_CLANG_TIDY local/clang-tidy -checks=-*,llvm-use-new-mlir-op-builder -fix)
and then fixed cases where temporary OpBuilders were used (as passed in
by reference now).
Instead users should use CombToArith+ArithToLLVM. There is still a pattern population function left for the comb.parity op, which does not have an equivalent in the arith dialect.
Moves Comb to LLVM and HW to LLVM conversions out of the LLHDToLLVM pass and into their own dedicated lowering passes, as proposed in #3539.
The methods convertToLLVMEndianess and llvmIndexOfStructField are also encapsulated here within a HWToLLVMEndianessConverter class, in order to allow easier re-use between different passes.
Jacques Pienaar