[PM] Make AnalysisManager::registerPass take its parameter by univers…

…al reference.

Summary:
Previously, we were forcing a copy if you passed an lvalue argument; now
we'll take it by reference.

Reviewers: chandlerc

Subscribers: mehdi_amini, silvas, llvm-commits

Differential Revision: https://reviews.llvm.org/D27370

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@288594 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/IR/PassManager.h

@@ -548,7 +548,8 @@ template <typename IRUnitT, typename... ExtraArgTs> class AnalysisManager {
   /// interface also lends itself to minimizing the number of times we have to
   /// do lookups for analyses or construct complex passes only to throw them
   /// away.
-  template <typename PassBuilderT> bool registerPass(PassBuilderT PassBuilder) {
+  template <typename PassBuilderT>
+  bool registerPass(PassBuilderT &&PassBuilder) {
     typedef decltype(PassBuilder()) PassT;
     typedef detail::AnalysisPassModel<IRUnitT, PassT, PreservedAnalyses,
                                       Invalidator, ExtraArgTs...>