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8be91b553e
We're intending to move to a world where the type of a register is determined by its (unique) def. This is incompatible with physregs, which are untyped. It also means the other passes don't have to worry quite so much about register-class compatibility and inserting COPYs appropriately. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@280132 91177308-0d34-0410-b5e6-96231b3b80d8