SmallVector and SmallPtrSet allocations now power-of-two aligned.
This time tested on both OSX and Linux.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178377 91177308-0d34-0410-b5e6-96231b3b80d8
Updated test0 of retain-not-declared.ll to reflect the fact that objc-arc-expand runs before objc-arc/objc-arc-contract.

Specifically, objc-arc-expand will make sure that the
objc_retainAutoreleasedReturnValue, objc_autoreleaseReturnValue, and ret
will all have %call as an argument.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178382 91177308-0d34-0410-b5e6-96231b3b80d8