[PATCH] D72386: [ThinLTO] pass UnrollLoops/VectorizeLoop/VectorizeSLP in CGOpts down to pass builder in ltobackend

[Teresa Johnson via Phabricator via llvm-commits]

tejohnson added a comment.

Thinking through this some more - this patch fixes the distributed ThinLTO backend case, but not the in-process ThinLTO case. For that, both lld and gold plugin will need to set this up. And since they don't have the clang options, they will just need to set to some reasonable default, probably either hardwired on like in the old PM or set based on the CGOptLevel they set from linker options. However, they both default to -O2 unless a special plugin or lld linker option is set, so we'd probably want to enable these passes there at O2 <https://reviews.llvm.org/owners/package/2/>+.


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