wanglei fcff4582f0 [LoongArch] Permit auto-vectorization using LSX/LASX with auto-vec feature (#78943) ...

With enough codegen complete, we can now correctly report the size of
vector registers for LSX/LASX, allowing auto vectorization (The
`auto-vec` feature needs to be enabled simultaneously).

As described, the `auto-vec` feature is an experimental one. To ensure
that automatic vectorization is not enabled by default, because the
information provided by the current `TTI` cannot yield additional
benefits for automatic vectorization.

2024-01-23 09:06:35 +08:00

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