[PATCH] D125904: [Cuda] Use fallback method to mangle externalized decls if no CUID given

[Joseph Huber via Phabricator via cfe-commits]

jhuber6 added a comment.

Also, for the OpenMP case, we already pass the host-IR as a dependency for the device compilation. So it would be relatively easy for us to just generate these names on the host and then read them from the IR for the device. The problem is that CUDA / HIP doesn't use this approach so it wouldn't be a great solution to have two different ways to do this. So we would either need to make CUDA / HIP take the host IR and use that, or move OpenMP to use the driver. The benefit of passing the IR is that we can much more stably generate some arbitrary string to mangle these names and we're guarunteed to have them match up because we read them from the host. The downside is that it'd be somewhat of a regression because now we have an extra call to Clang for CUDA / HIP when we previously didn't need to.


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https://reviews.llvm.org/D125904