[PATCH] D129013: [RISCV] Enable (scalable) vectorization by default

[Kito Cheng via Phabricator via llvm-commits]

kito-cheng added a comment.

> clang is inherently a cross compiler. We can't ask question of the host environment (e.g. kernel version). To my knowledge, this information is not available in any information we do have about the target platform. Am I missing something here?

We could check with `/proc/cpuinfo` like `-mcpu=native` for most other targets, `V` only appeared in the `/proc/cpuinfo` only if `V` is supported in kernel.

Ideally this issue should resolved by checking `Tag_RISCV_arch`[1] in kernel loader.

[1] https://github.com/riscv-non-isa/riscv-elf-psabi-doc/pull/292


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  https://reviews.llvm.org/D129013/new/

https://reviews.llvm.org/D129013