Teresa Johnson 791c98e4c8 [ThinLTO] Remove dead and dropped symbol declarations when possible ... Summary: Removing the dropped symbols will prevent indirect call promotion in the ThinLTO Backend from adding a new reference to a symbol, which can result in linker unsats. This can happen when we compile with a sample profile collected from one binary by used for another, which may have profiled targets that aren't used in the new binary. Note that until dropDeadSymbols handles variables and aliases (in progress), we may not be able to remove the declaration and can still have an issue. Reviewers: grimar, davidxl Subscribers: mehdi_amini, inglorion, llvm-commits, eraman Differential Revision: https://reviews.llvm.org/D42816 llvm-svn: 324299		2018-02-06 00:43:39 +00:00
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X86	[ThinLTO] Remove dead and dropped symbol declarations when possible	2018-02-06 00:43:39 +00:00