5 Commits

Author	SHA1	Message	Date
Fangrui Song	54fb3ca96e	[ThinLTO] Add Visibility bits to GlobalValueSummary::GVFlags ... Imported functions and variable get the visibility from the module supplying the definition. However, non-imported definitions do not get the visibility from (ELF) the most constraining visibility among all modules (Mach-O) the visibility of the prevailing definition. This patch * adds visibility bits to GlobalValueSummary::GVFlags * computes the result visibility and propagates it to all definitions Protected/hidden can imply dso_local which can enable some optimizations (this is stronger than GVFlags::DSOLocal because the implied dso_local can be leveraged for ELF -shared while default visibility dso_local has to be cleared for ELF -shared). Note: we don't have summaries for declarations, so for ELF if a declaration has the most constraining visibility, the result visibility may not be that one. Differential Revision: https://reviews.llvm.org/D92900	2021-01-27 10:43:51 -08:00
Fangrui Song	728f99fa0b	[ThinLTO][test] Specify -enable-import-metadata to make !thinlto_src_module available in -DLLVM_ENABLE_ASSERTIONS=off mode	2020-12-31 09:31:53 -08:00
Fangrui Song	d7154bbf92	[ThinLTO][test] Add visibility related tests ... Reviewed By: tejohnson Differential Revision: https://reviews.llvm.org/D92899	2020-12-31 09:16:35 -08:00
Bogdan Graur	be764065be	Revert "[ThinLTO][test] Add visibility related tests" ... Both newly added tests fail in Release. This reverts commit 52aa4e2107. Reviewed By: SureYeaah Differential Revision: https://reviews.llvm.org/D93957	2020-12-31 11:42:58 +00:00
Fangrui Song	52aa4e2107	[ThinLTO][test] Add visibility related tests ... Reviewed By: tejohnson Differential Revision: https://reviews.llvm.org/D92899	2020-12-30 16:58:20 -08:00