[llvm] a7b8393 - [ORC] Don't waste time building empty replacement MaterializationUnits.

[Lang Hames via llvm-commits]

Author: Lang Hames
Date: 2020-03-19T11:02:56-07:00
New Revision: a7b8393ffea94d387f60d71ab5e1e026e1d00ffb

URL: https://github.com/llvm/llvm-project/commit/a7b8393ffea94d387f60d71ab5e1e026e1d00ffb
DIFF: https://github.com/llvm/llvm-project/commit/a7b8393ffea94d387f60d71ab5e1e026e1d00ffb.diff

LOG: [ORC] Don't waste time building empty replacement MaterializationUnits.

Added: 
    

Modified: 
    llvm/lib/ExecutionEngine/Orc/CompileOnDemandLayer.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/ExecutionEngine/Orc/CompileOnDemandLayer.cpp b/llvm/lib/ExecutionEngine/Orc/CompileOnDemandLayer.cpp
index 3905ce9bf5ac..a8e88a9785c5 100644
--- a/llvm/lib/ExecutionEngine/Orc/CompileOnDemandLayer.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/CompileOnDemandLayer.cpp
@@ -165,10 +165,12 @@ void CompileOnDemandLayer::emit(MaterializationResponsibility R,
     return;
   }
 
-  R.replace(reexports(PDR.getImplDylib(), std::move(NonCallables),
-                      JITDylibLookupFlags::MatchAllSymbols));
-  R.replace(lazyReexports(LCTMgr, PDR.getISManager(), PDR.getImplDylib(),
-                          std::move(Callables), AliaseeImpls));
+  if (!NonCallables.empty())
+    R.replace(reexports(PDR.getImplDylib(), std::move(NonCallables),
+                        JITDylibLookupFlags::MatchAllSymbols));
+  if (!Callables.empty())
+    R.replace(lazyReexports(LCTMgr, PDR.getISManager(), PDR.getImplDylib(),
+                            std::move(Callables), AliaseeImpls));
 }
 
 CompileOnDemandLayer::PerDylibResources &