1 files changed, 16 insertions, 1 deletions
diff --git a/llvm/lib/ExecutionEngine/ExecutionEngine.cpp b/llvm/lib/ExecutionEngine/ExecutionEngine.cpp
index 32d20ea0e30..8be399e510e 100644
--- a/llvm/lib/ExecutionEngine/ExecutionEngine.cpp
+++ b/llvm/lib/ExecutionEngine/ExecutionEngine.cpp
@@ -46,6 +46,11 @@ ExecutionEngine *(*ExecutionEngine::MCJITCtor)(
     std::unique_ptr<Module> M, std::string *ErrorStr,
     std::unique_ptr<RTDyldMemoryManager> MCJMM,
     std::unique_ptr<TargetMachine> TM) = nullptr;
+
+ExecutionEngine *(*ExecutionEngine::OrcMCJITReplacementCtor)(
+  std::string *ErrorStr, std::unique_ptr<RTDyldMemoryManager> OrcJMM,
+  std::unique_ptr<TargetMachine> TM) = nullptr;
+
 ExecutionEngine *(*ExecutionEngine::InterpCtor)(std::unique_ptr<Module> M,
                                                 std::string *ErrorStr) =nullptr;
 
@@ -393,6 +398,10 @@ int ExecutionEngine::runFunctionAsMain(Function *Fn,
   return runFunction(Fn, GVArgs).IntVal.getZExtValue();
 }
 
+EngineBuilder::EngineBuilder() {
+  InitEngine();
+}
+
 EngineBuilder::EngineBuilder(std::unique_ptr<Module> M)
   : M(std::move(M)), MCJMM(nullptr) {
   InitEngine();
@@ -414,6 +423,7 @@ void EngineBuilder::InitEngine() {
   Options = TargetOptions();
   RelocModel = Reloc::Default;
   CMModel = CodeModel::JITDefault;
+  UseOrcMCJITReplacement = false;
 
 // IR module verification is enabled by default in debug builds, and disabled
 // by default in release builds.
@@ -456,9 +466,14 @@ ExecutionEngine *EngineBuilder::create(TargetMachine *TM) {
     }
 
     ExecutionEngine *EE = nullptr;
-    if (ExecutionEngine::MCJITCtor)
+    if (ExecutionEngine::OrcMCJITReplacementCtor && UseOrcMCJITReplacement) {
+      EE = ExecutionEngine::OrcMCJITReplacementCtor(ErrorStr, std::move(MCJMM),
+                                                    std::move(TheTM));
+      EE->addModule(std::move(M));
+    } else if (ExecutionEngine::MCJITCtor)
       EE = ExecutionEngine::MCJITCtor(std::move(M), ErrorStr, std::move(MCJMM),
                                       std::move(TheTM));
+
     if (EE) {
       EE->setVerifyModules(VerifyModules);
       return EE;