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whether register r9 should be reserved. This recommits r242737, which broke bots because the number of subtarget features went over the limit of 64. This change is needed because we cannot use a backend option to set cl::opt "arm-reserve-r9" when doing LTO. Out-of-tree projects currently using cl::opt option "-arm-reserve-r9" to reserve r9 should make changes to add subtarget feature "reserve-r9" to the IR. rdar://problem/21529937 Differential Revision: http://reviews.llvm.org/D11320 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242756 91177308-0d34-0410-b5e6-96231b3b80d8