[PATCH] D90853: [RISCV] Add DAG nodes to represent read/write CSR

[Serge Pavlov via Phabricator via llvm-commits]

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In D90853#2388346 <https://reviews.llvm.org/D90853#2388346>, @jrtc27 wrote:

> I’m pretty sure you can use X0 as the output...

Could you please tell me how I can do that?


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