[llvm] [RISCV][VLOPT] Support segmented store instructions (PR #155467)

[Min-Yih Hsu via llvm-commits]

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mshockwave wrote:

> Add the zeroext attribute? That's what we have in most of the VP intrinsic tests

yeah I'm adding it to all `%evl` in that test in a separate commit. I'll rebase this patch afterward (and I just realized I mistakenly said "sign-extend")

https://github.com/llvm/llvm-project/pull/155467