[PATCH] Add support for part-word atomics for PPC

[Nemanja Ivanovic]

One thing to note is that no Clang option is added for this (i.e. -mpartword-atomics). As a follow-on task for this, the quadword version will be implemented which does have a corresponding option in GCC and I plan to implement the same option in Clang. I don't think that the inconsistency is an issue since part word atomics can be implemented without the part word atomic instructions whereas I imagine that the quad word version would require locks if there is no instruction for it in the ISA. Furthermore, the quadword version is new for ISA 2.07 whereas the part word versions existed in ISA 2.06.


REPOSITORY
  rL LLVM

http://reviews.llvm.org/D8090

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