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Author SHA1 Message Date
Tim Northover 2b5f03aa12 ARM: fix big-endian 64-bit cmpxchg. 
On big-endian machines the high and low parts of the value accessed by ldrexd
and strexd are swapped around. To account for this we swap inputs and outputs
in ISelLowering.

Patch by Bharathi Seshadri.

llvm-svn: 306865
 2017-06-30 19:51:02 +00:00