[PATCH] D42680: [ThinLTO] Ignore -fthinlto-index= for non-ThinLTO files

[Peter Collingbourne via Phabricator via cfe-commits]

pcc requested changes to this revision.
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This doesn't seem right to me. In a mixed full/thin LTO link the full LTO module would be compiled during the indexing phase. We don't want to compile it again in the backend as it could lead at best to duplicate symbol errors and at worst to miscompiles of `llvm.type.*` intrinsic calls.


https://reviews.llvm.org/D42680