with LLVM 14: only new pass manager
up to LLVM 13: only old pass manager

These do not work yet with the new pass manager:
cmplog-instructions-pass.so
compare-transform-pass.so
afl-llvm-dict2file.so
afl-llvm-lto-instrumentlist.so
SanitizerCoverageLTO.so
SanitizerCoveragePCGUARD.so