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Select vector G_ADD for MIPS32 with MSA. We have to set bank for vector operands to fprb and selectImpl will do the rest. __builtin_msa_addv_<format> will be transformed into G_ADD in legalizeIntrinsic and selected in the same way. __builtin_msa_addvi_<format> will be directly selected into ADDVI_<format> in legalizeIntrinsic. MIR tests for it have unnecessary additional copies. Capture current state of tests with run-pass=legalizer with a test in test/CodeGen/MIR/Mips. Differential Revision: https://reviews.llvm.org/D68984 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375501 91177308-0d34-0410-b5e6-96231b3b80d8