[Orc] Use raw TargetAddresses for callback trampoline addresses, rather than IR.

Add convenience function for building a typed IR Constant from trampoline
addresses.
   


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233504 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/ExecutionEngine/Orc/CompileOnDemandLayer.h

@@ -258,7 +258,8 @@ private:
           CompileCallbackMgr.getCompileCallback(*Proto->getFunctionType());
         GlobalVariable *FunctionBodyPointer =
           createImplPointer(*Proto, Name + AddrSuffix,
-                            CallbackInfo.getAddress());
+                            createIRTypedAddress(*Proto->getFunctionType(),
+                                                 CallbackInfo.getAddress()));
         makeStub(*Proto, *FunctionBodyPointer);
 
         F.setName(Name + BodySuffix);