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-rw-r--r--llvm/lib/Transforms/IPO/PassManagerBuilder.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
index a4a1852de30..9f58b49288a 100644
--- a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
+++ b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
@@ -556,6 +556,9 @@ void PassManagerBuilder::addLateLTOOptimizationPasses(
// Delete basic blocks, which optimization passes may have killed.
PM.add(createCFGSimplificationPass());
+ // Drop bodies of available externally objects to improve GlobalDCE.
+ PM.add(createEliminateAvailableExternallyPass());
+
// Now that we have optimized the program, discard unreachable functions.
PM.add(createGlobalDCEPass());
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