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Rollup merge of #134814 - sayantn:keylocker, r=oli-obk

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Add `kl` and `widekl` target features, and the feature gate

This is an effort towards #134813. This PR adds the target-features and the feature gate to `rustc`

<!--
```@rustbot``` label O-x86_64 O-x86_32 A-target-feature
r? compiler
-->
This commit is contained in:
Matthias Krüger 2025-02-04 06:13:58 +01:00 • committed by GitHub
commit e4eedb5488
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compiler/rustc_target/src/target_features.rs
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@ -409,6 +409,7 @@ const X86_FEATURES: &[(&str, Stability, ImpliedFeatures)] = &[
("fma", Stable, &["avx"]),
("fxsr", Stable, &[]),
("gfni", Unstable(sym::avx512_target_feature), &["sse2"]),
("kl", Unstable(sym::keylocker_x86), &["sse2"]),
("lahfsahf", Unstable(sym::lahfsahf_target_feature), &[]),
("lzcnt", Stable, &[]),
("movbe", Stable, &[]),
@ -435,6 +436,7 @@ const X86_FEATURES: &[(&str, Stability, ImpliedFeatures)] = &[
("tbm", Unstable(sym::tbm_target_feature), &[]),
("vaes", Unstable(sym::avx512_target_feature), &["avx2", "aes"]),
("vpclmulqdq", Unstable(sym::avx512_target_feature), &["avx", "pclmulqdq"]),
("widekl", Unstable(sym::keylocker_x86), &["kl"]),
("x87", Unstable(sym::x87_target_feature), &[]),
("xop", Unstable(sym::xop_target_feature), &[/*"fma4", */ "avx", "sse4a"]),
("xsave", Stable, &[]),