[PATCH] D33535: [PM] Teach the PGO instrumentation pasess to run GlobalDCE before instrumenting code.

[Chandler Carruth via Phabricator via llvm-commits]

chandlerc added a comment.

Forgot to mention, I also added a test to verify that GlobalDCE won't remove available_externally functions that are actually in use in the module so it won't impair subsequent optimization passes.


https://reviews.llvm.org/D33535