[ORC] Pass symbol name to discard by const reference.

This saves some unnecessary atomic ref-counting operations.

llvm-svn: 343927

1 files changed, 3 insertions, 2 deletions

diff --git a/llvm/lib/ExecutionEngine/Orc/Layer.cpp b/llvm/lib/ExecutionEngine/Orc/Layer.cpp
index 323e1d2214b..22dbf5c26d1 100644
--- a/llvm/lib/ExecutionEngine/Orc/Layer.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/Layer.cpp
@@ -53,7 +53,8 @@ StringRef IRMaterializationUnit::getName() const {
   return "<null module>";
 }
 
-void IRMaterializationUnit::discard(const JITDylib &JD, SymbolStringPtr Name) {
+void IRMaterializationUnit::discard(const JITDylib &JD,
+                                    const SymbolStringPtr &Name) {
   LLVM_DEBUG(JD.getExecutionSession().runSessionLocked([&]() {
     dbgs() << "In " << JD.getName() << " discarding " << *Name << " from MU@"
            << this << " (" << getName() << ")\n";
@@ -145,7 +146,7 @@ void BasicObjectLayerMaterializationUnit::materialize(
 }
 
 void BasicObjectLayerMaterializationUnit::discard(const JITDylib &JD,
-                                                  SymbolStringPtr Name) {
+                                                  const SymbolStringPtr &Name) {
   // FIXME: Support object file level discard. This could be done by building a
   //        filter to pass to the object layer along with the object itself.
 }