[llvm] [RISCV][LSR] Account for temporary register for base addition (PR #92296)

[Alex Bradbury via llvm-commits]

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asb wrote:

Ah, my mistake then. Looks like I typoed the filename when trying to load it in my local checkout which led me to believe it has recently been pushed. Thanks for clarifying.

https://github.com/llvm/llvm-project/pull/92296