[PATCH] D123515: [RISCV] Support '.option arch' directive

[luxufan via Phabricator via llvm-commits]

StephenFan added a comment.

In D123515#4248222 <https://reviews.llvm.org/D123515#4248222>, @luismarques wrote:

> Thanks for all of the improvements so far.
>
> Two additional problems I noticed:
>
> 1. It currently accepts non-extension features like `.option arch, +svnapot, +relax`.

`svnapot` can be parsed from arch string. I think we need an API in RISCVISAInfo to decide that some extensions are non-extension features, only rejecting in the logic of parse .option arch directive seems tricky.


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  https://reviews.llvm.org/D123515/new/

https://reviews.llvm.org/D123515