cranelift: Remove the enable_simd shared setting
#6631
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This commit removes a setting for Cranelift which I've found a bit confusing historically and I think is no longer necessary. The setting is currently documented as enabling SIMD instructions, but that only sort of works for the x64 backend and none of the other backends look at it. Historically this was used to flag to Cranelift that a higher x64 baseline feature set is required for codegen but as of bytecodealliance#6625 that's no longer necessary. Otherwise it seems more Cranelift-like nowadays to say that vector instructions generate SIMD instructions where non-vector instructions probably don't, but may still depending on activated CPU features. In that sense I'm not sure if a dedicated `enable_simd` setting is still motivated, so this PR removes it. This renames some features in the x86 backend such as `use_avx_simd` to `use_avx` since the `_simd` part is no longer part of the computation now that `enable_simd` is gone.
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This commit removes a setting for Cranelift which I've found a bit confusing historically and I think is no longer necessary. The setting is currently documented as enabling SIMD instructions, but that only sort of works for the x64 backend and none of the other backends look at it. Historically this was used to flag to Cranelift that a higher x64 baseline feature set is required for codegen but as of #6625 that's no longer necessary.
Otherwise it seems more Cranelift-like nowadays to say that vector instructions generate SIMD instructions where non-vector instructions probably don't, but may still depending on activated CPU features. In that sense I'm not sure if a dedicated
enable_simdsetting is still motivated, so this PR removes it.This renames some features in the x86 backend such as
use_avx_simdtouse_avxsince the_simdpart is no longer part of the computation now thatenable_simdis gone.