diff options
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/IPO/PassManagerBuilder.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp index bb15cf5..828eb5ee 100644 --- a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp +++ b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp @@ -418,6 +418,14 @@ void PassManagerBuilder::populateModulePassManager( else if (GlobalExtensionsNotEmpty() || !Extensions.empty()) MPM.add(createBarrierNoopPass()); + if (PerformThinLTO) { + // Drop available_externally and unreferenced globals. This is necessary + // with ThinLTO in order to avoid leaving undefined references to dead + // globals in the object file. + MPM.add(createEliminateAvailableExternallyPass()); + MPM.add(createGlobalDCEPass()); + } + addExtensionsToPM(EP_EnabledOnOptLevel0, MPM); // Rename anon globals to be able to export them in the summary. |