[PATCH] D67579: [PGO] Use linkonce_odr linkage for __profd_ variables in comdat groups

[Rong Xu via Phabricator via llvm-commits]

xur added a comment.

For the legacy pass manager, use option "-mllvm -debug-pass=Structure", or in the source, we add the lowering pass right after instrumentation pass.


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https://reviews.llvm.org/D67579