commit a7b8393ffea94d387f60d71ab5e1e026e1d00ffb
author Lang Hames <lhames@gmail.com> Wed Mar 18 20:09:11 2020 -0700
committer Lang Hames <lhames@gmail.com> Thu Mar 19 11:02:56 2020 -0700
tree 68cb84460687cdd2ec48062ec3bce9c4bb24e08a
parent cd34c0570b5e667cc856f14367a97f0279c4d64a

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

llvm/lib/ExecutionEngine/Orc/CompileOnDemandLayer.cpp

diff --git a/llvm/lib/ExecutionEngine/Orc/CompileOnDemandLayer.cpp b/llvm/lib/ExecutionEngine/Orc/CompileOnDemandLayer.cpp
index 3905ce9..a8e88a9 100644
--- a/llvm/lib/ExecutionEngine/Orc/CompileOnDemandLayer.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/CompileOnDemandLayer.cpp
@@ -165,10 +165,12 @@
     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 &