[Orc] Make the makeStub function propagate argument attributes onto the call to

the function body.

This is necessary for correctness when lazily compiling.

Also, flesh out the Orc unit test infrastructure slightly, and add a unit test
for this.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235347 91177308-0d34-0410-b5e6-96231b3b80d8

lib/ExecutionEngine/Orc/IndirectionUtils.cpp

@@ -49,6 +49,7 @@ void makeStub(Function &F, GlobalVariable &ImplPointer) {
     CallArgs.push_back(&A);
   CallInst *Call = Builder.CreateCall(ImplAddr, CallArgs);
   Call->setTailCall();
+  Call->setAttributes(F.getAttributes());
   Builder.CreateRet(Call);
 }