[PATCH] D109215: [RISCV] Fix arch string parsing for multi-character extensions

[Yueh-Ting Chen via Phabricator via llvm-commits]

eopXD added a reviewer: asb.
eopXD added a comment.

@asb @jrtc27 
Hi Alex and Jessica,

Although the issue on relaxing naming rules aren't resolved in riscv-isa-manual [1], the v-spec v1.0 had come out including `zve` and `zvl` extensions and is frozen [2].
I have just finished a series of patch for adding extension `zve`, `zvl` support onto LLVM. (Please check the related revisions)
The patches rely on this patch to land, may you share your thought on this.

Thank you.

[1] https://github.com/riscv/riscv-isa-manual/pull/718
[2] https://github.com/riscv/riscv-v-spec/releases/tag/v1.0


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