[ARM] GlobalISel: Support SP in regbankselect
We used to hit an unreachable in getRegBankFromRegClass when dealing with the stack pointer. This commit adds support for the GPRsp reg class. llvm-svn: 297621
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We used to hit an unreachable in getRegBankFromRegClass when dealing with the stack pointer. This commit adds support for the GPRsp reg class. llvm-svn: 297621