[NVVM] Remove noduplicate attribute from synchronizing intrinsics.

Summary:
I've completed my audit of all the code that looks at noduplicate and
added handling of convergent where appropriate, so we no longer need
noduplicate on these intrinsics.

Reviewers: jholewinski

Subscribers: llvm-commits, jholewinski

Differential Revision: http://reviews.llvm.org/D18168

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@264107 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed