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10f7f2a222
Although there is only one Altivec VRSAVE register, it is a member of a register class, and we need the ability to spill it. Because this register is normally callee-preserved and handled by special code this has never before been necessary. However, this capability will be required by a forthcoming commit adding SjLj support. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177654 91177308-0d34-0410-b5e6-96231b3b80d8