[llvm] [llvm][TableGen] Allow physical registers in patterns for GlobalISel emitter (PR #113127)

[via llvm-commits]

JL2210 wrote:

I'm not sure this is entirely correct. I tested it on my backend that and it seems some instructions that don't use physical registers don't have their operands rendered (is that the right word?).

https://github.com/llvm/llvm-project/pull/113127