[ORC] Update JITCompileCallbackManager to support multi-threaded code.

Previously JITCompileCallbackManager only supported single threaded code. This
patch embeds a VSO (see include/llvm/ExecutionEngine/Orc/Core.h) in the callback
manager. The VSO ensures that the compile callback is only executed once and that
the resulting address cached for use by subsequent re-entries.

llvm-svn: 333490

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/unittests/ExecutionEngine/Orc/OrcTestCommon.h b/llvm/unittests/ExecutionEngine/Orc/OrcTestCommon.h
index 6b2743b9853..c4424e009b4 100644
--- a/llvm/unittests/ExecutionEngine/Orc/OrcTestCommon.h
+++ b/llvm/unittests/ExecutionEngine/Orc/OrcTestCommon.h
@@ -71,11 +71,12 @@ public:
       // Use ability to create callback manager to detect whether Orc
       // has indirection support on this platform. This way the test
       // and Orc code do not get out of sync.
-      SupportsIndirection = !!orc::createLocalCompileCallbackManager(TT, 0);
+      SupportsIndirection = !!orc::createLocalCompileCallbackManager(TT, ES, 0);
     }
   };
 
 protected:
+  orc::ExecutionSession ES;
   LLVMContext Context;
   std::unique_ptr<TargetMachine> TM;
   bool SupportsJIT = false;