Do you know how to test that ? besides building beignet?
No, sorry - oclgrind is the other package to ship what appear to be clang .pch files, but I haven't specifically checked whether it's affected.
beignet currently isn't the easiest test case, as (as noted above) it has other reproducibility issues, requiring llvm-bcanalyzer to distinguish this bug (in OPENCL_EXTENSION_TYPES) from the ones that are beignet's fault (in INPUT_FILES_BLOCK and ORIGINAL_PCH_DIR).
I had been mostly ignoring those because there was no point fixing them if this bug was to be left open, but can try to deal with them today.
