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path: root/llvm/lib/Transforms/IPO/ElimAvailExtern.cpp
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* Remove unused variable.Rafael Espindola2015-07-131-1/+0
| | | | | | Sorry I missed it in the previous commit. llvm-svn: 242032
* Aliases don't have available_externally linkage.Rafael Espindola2015-07-131-11/+0
| | | | | | | Allowing that is probably a good idea, but currently we don't, so this is dead code. llvm-svn: 242031
* Don't change the visibility when converting a definition to a declaration.Rafael Espindola2015-07-131-3/+0
| | | | llvm-svn: 242030
* Resubmit "Add new EliminateAvailableExternally module pass" (r239480)Teresa Johnson2015-07-061-0/+99
| | | | | | | | | | | | | | | | | | | | | | This change includes a fix for https://code.google.com/p/chromium/issues/detail?id=499508#c3, which required updating the visibility for symbols with eliminated definitions. --Original Commit Message-- Add new EliminateAvailableExternally module pass, which is performed in O2 compiles just before GlobalDCE, unless we are preparing for LTO. This pass eliminates available externally globals (turning them into declarations), regardless of whether they are dead/unreferenced, since we are guaranteed to have a copy available elsewhere at link time. This enables additional opportunities for GlobalDCE. If we are preparing for LTO (e.g. a -flto -c compile), the pass is not included as we want to preserve available externally functions for possible link time inlining. The FE indicates whether we are doing an -flto compile via the new PrepareForLTO flag on the PassManagerBuilder. llvm-svn: 241466
* Revert commit r239480 as it causes ↵Teresa Johnson2015-06-121-96/+0
| | | | | | https://code.google.com/p/chromium/issues/detail?id=499508#c3. llvm-svn: 239589
* Add new EliminateAvailableExternally module pass, which is performed inTeresa Johnson2015-06-101-0/+96
O2 compiles just before GlobalDCE, unless we are preparing for LTO. This pass eliminates available externally globals (turning them into declarations), regardless of whether they are dead/unreferenced, since we are guaranteed to have a copy available elsewhere at link time. This enables additional opportunities for GlobalDCE. If we are preparing for LTO (e.g. a -flto -c compile), the pass is not included as we want to preserve available externally functions for possible link time inlining. The FE indicates whether we are doing an -flto compile via the new PrepareForLTO flag on the PassManagerBuilder. llvm-svn: 239480
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