[ORC] Add a constructor to create an IRMaterializationUnit from a module and

pre-existing SymbolFlags and SymbolToDefinition maps.

This constructor is useful when delegating work from an existing
IRMaterialiaztionUnit to a new one, as it avoids the cost of re-computing these
maps.

llvm-svn: 333852

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/ExecutionEngine/Orc/Layer.cpp b/llvm/lib/ExecutionEngine/Orc/Layer.cpp
index 1927bce45d4..cbf1f4c244d 100644
--- a/llvm/lib/ExecutionEngine/Orc/Layer.cpp
+++ b/llvm/lib/ExecutionEngine/Orc/Layer.cpp
@@ -51,6 +51,12 @@ IRMaterializationUnit::IRMaterializationUnit(ExecutionSession &ES,
   }
 }
 
+IRMaterializationUnit::IRMaterializationUnit(
+    std::unique_ptr<Module> M, SymbolFlagsMap SymbolFlags,
+    SymbolNameToDefinitionMap SymbolToDefinition)
+    : MaterializationUnit(std::move(SymbolFlags)), M(std::move(M)),
+      SymbolToDefinition(std::move(SymbolToDefinition)) {}
+
 void IRMaterializationUnit::discard(const VSO &V, SymbolStringPtr Name) {
   auto I = SymbolToDefinition.find(Name);
   assert(I != SymbolToDefinition.end() &&