Chad Rosier 862a41270f [AArch64] Mark mrs of TPIDR_EL0 (thread pointer) as not having side effects. ...

Among other things, this allows Machine LICM to hoist a costly 'mrs'
instruction from within a loop.

Differential Revision: http://reviews.llvm.org/D31151

llvm-svn: 298851

2017-03-27 15:52:38 +00:00

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