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clang-p2996/llvm/lib/CodeGen/AtomicExpandPass.cpp
Tim Northover f520eff782 AArch64: use ldxp/stxp pair to implement 128-bit atomic loads. 
The ARM ARM is clear that 128-bit loads are only guaranteed to have been atomic
if there has been a corresponding successful stxp. It's less clear for AArch32, so
I'm leaving that alone for now.

llvm-svn: 254524
2015-12-02 18:12:57 +00:00

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