1 files changed, 6 insertions, 4 deletions
diff --git a/llvm/lib/ExecutionEngine/Orc/Layer.cpp b/llvm/lib/ExecutionEngine/Orc/Layer.cpp
index 346dde4f7a8..1927bce45d4 100644
--- a/llvm/lib/ExecutionEngine/Orc/Layer.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/Layer.cpp
@@ -46,17 +46,19 @@ IRMaterializationUnit::IRMaterializationUnit(ExecutionSession &ES,
         !G.hasAvailableExternallyLinkage()) {
       auto MangledName = Mangle(G.getName());
       SymbolFlags[MangledName] = JITSymbolFlags::fromGlobalValue(G);
-      Discardable[MangledName] = &G;
+      SymbolToDefinition[MangledName] = &G;
     }
   }
 }
 
 void IRMaterializationUnit::discard(const VSO &V, SymbolStringPtr Name) {
-  auto I = Discardable.find(Name);
-  assert(I != Discardable.end() &&
+  auto I = SymbolToDefinition.find(Name);
+  assert(I != SymbolToDefinition.end() &&
          "Symbol not provided by this MU, or previously discarded");
+  assert(!I->second->isDeclaration() &&
+         "Discard should only apply to definitions");
   I->second->setLinkage(GlobalValue::AvailableExternallyLinkage);
-  Discardable.erase(I);
+  SymbolToDefinition.erase(I);
 }
 
 BasicIRLayerMaterializationUnit::BasicIRLayerMaterializationUnit(