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Author SHA1 Message Date
Matthias Braun c618a466f1 ARMFrameLowering: Only set ExtraCSSpill for actually unused registers. 
The code assumed that unclobbered/unspilled callee saved registers are
unused in the function. This is not true for callee saved registers that are
also used to pass parameters such as swiftself.

rdar://33401922

llvm-svn: 309350
 2017-07-28 01:36:32 +00:00