Auto merge of #139229 - Zalathar:rollup-5cs3f4d, r=Zalathar

Rollup of 14 pull requests

Successful merges:

 - #135295 (Check empty SIMD vector in inline asm)
 - #138003 (Add the new `amx` target features and the `movrs` target feature)
 - #138823 (rustc_target: RISC-V: add base `I`-related important extensions)
 - #138913 (Remove even more instances of `@ts-expect-error` from search.js)
 - #138941 (Do not mix normalized and unnormalized caller bounds when constructing param-env for `receiver_is_dispatchable`)
 - #139060 (replace commit placeholder in vendor status with actual commit)
 - #139102 (coverage: Avoid splitting spans during span extraction/refinement)
 - #139191 (small opaque type/borrowck cleanup)
 - #139200 (Skip suggest impl or dyn when poly trait is not a real trait)
 - #139208 (fix dead link netbsd.md)
 - #139210 (chore: remove redundant backtick)
 - #139212 (Update mdbook to 0.4.48)
 - #139214 (Tell rustfmt to use the 2024 edition in ./x.py fmt)
 - #139225 (move autodiff from EnzymeAD/Enzyme to our rust-lang/Enzyme soft-fork)

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 7 insertions, 0 deletions

diff --git a/compiler/rustc_codegen_llvm/src/llvm_util.rs b/compiler/rustc_codegen_llvm/src/llvm_util.rs
index 5bf931965c7..4e85286ed55 100644
--- a/compiler/rustc_codegen_llvm/src/llvm_util.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm_util.rs
@@ -300,6 +300,13 @@ pub(crate) fn to_llvm_features<'a>(sess: &Session, s: &'a str) -> Option<LLVMFea
         ("sparc", "v8plus") if get_version().0 == 19 => Some(LLVMFeature::new("v9")),
         ("sparc", "v8plus") if get_version().0 < 19 => None,
         ("powerpc", "power8-crypto") => Some(LLVMFeature::new("crypto")),
+        // These new `amx` variants and `movrs` were introduced in LLVM20
+        ("x86", "amx-avx512" | "amx-fp8" | "amx-movrs" | "amx-tf32" | "amx-transpose")
+            if get_version().0 < 20 =>
+        {
+            None
+        }
+        ("x86", "movrs") if get_version().0 < 20 => None,
         (_, s) => Some(LLVMFeature::new(s)),
     }
 }