[PATCH] D72538: [ThinLTO] Add additional ThinLTO pipeline testing with new PM

[Teresa Johnson via Phabricator via cfe-commits]

tejohnson added a comment.

In D72538#4291552 <https://reviews.llvm.org/D72538#4291552>, @nikic wrote:

> Would it be possible to cut down the Clang side tests to only check parts that Clang controls in some way, e.g. that SLPVectorizer is enabled? This test is something of a PITA because it tests LLVM implementation details but is not part of the LLVM tests, so it usually gets missed when doing pipeline changes.

I think we can cut this down significantly, since the llvm tests added here check the full ThinLTO default pipeline setup at different opt levels. However, the point of the clang test is to make sure that for a distributed ThinLTO backend we correctly invoke thinBackend() which should set up the ThinLTO default pipeline. So how about I cut this down to check a single pass that is only invoked in the LTO backends? Specifically, I'm thinking of WholeProgramDevirtPass.


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https://reviews.llvm.org/D72538