Auto merge of rust-lang#140652 - Zalathar:perf-revert-139675, r=<try>

[DO NOT MERGE] Check the perf impact of reverting rust-lang#139675

According to rust-lang#140633 (comment), the changes in rust-lang#139675 caused many measurable perf regressions. We can double-check that result by benchmarking a revert.

---
This reverts commit ed7590f, reversing changes made to 3559e0a.

r? ghost

Author: bors

compiler/rustc_codegen_llvm/src/llvm_util.rs

@@ -301,9 +301,6 @@ pub(crate) fn to_llvm_features<'a>(sess: &Session, s: &'a str) -> Option<LLVMFea
             None
         }
         ("x86", "movrs") if get_version().0 < 20 => None,
-        ("x86", "avx10.1") => Some(LLVMFeature::new("avx10.1-512")),
-        ("x86", "avx10.2") if get_version().0 < 20 => None,
-        ("x86", "avx10.2") if get_version().0 >= 20 => Some(LLVMFeature::new("avx10.2-512")),
         (_, s) => Some(LLVMFeature::new(s)),
     }
 }

compiler/rustc_feature/src/unstable.rs

@@ -393,8 +393,6 @@ declare_features! (
     (unstable, async_for_loop, "1.77.0", Some(118898)),
     /// Allows `async` trait bound modifier.
     (unstable, async_trait_bounds, "1.85.0", Some(62290)),
-    /// Allows using Intel AVX10 target features and intrinsics
-    (unstable, avx10_target_feature, "CURRENT_RUSTC_VERSION", Some(138843)),
     /// Allows using C-variadics.
     (unstable, c_variadic, "1.34.0", Some(44930)),
     /// Allows the use of `#[cfg(contract_checks)` to check if contract checks are enabled.

compiler/rustc_span/src/symbol.rs

@@ -531,7 +531,6 @@ symbols! {
         autodiff,
         automatically_derived,
         avx,
-        avx10_target_feature,
         avx512_target_feature,
         avx512bw,
         avx512f,

compiler/rustc_target/src/target_features.rs

@@ -394,26 +394,6 @@ static X86_FEATURES: &[(&str, Stability, ImpliedFeatures)] = &[
     ("amx-tile", Unstable(sym::x86_amx_intrinsics), &[]),
     ("amx-transpose", Unstable(sym::x86_amx_intrinsics), &["amx-tile"]),
     ("avx", Stable, &["sse4.2"]),
-    (
-        "avx10.1",
-        Unstable(sym::avx10_target_feature),
-        &[
-            "avx512bf16",
-            "avx512bitalg",
-            "avx512bw",
-            "avx512cd",
-            "avx512dq",
-            "avx512f",
-            "avx512fp16",
-            "avx512ifma",
-            "avx512vbmi",
-            "avx512vbmi2",
-            "avx512vl",
-            "avx512vnni",
-            "avx512vpopcntdq",
-        ],
-    ),
-    ("avx10.2", Unstable(sym::avx10_target_feature), &["avx10.1"]),
     ("avx2", Stable, &["avx"]),
     ("avx512bf16", Unstable(sym::avx512_target_feature), &["avx512bw"]),
     ("avx512bitalg", Unstable(sym::avx512_target_feature), &["avx512bw"]),

tests/ui/check-cfg/and-more-diagnostic.rs

@@ -5,7 +5,7 @@
 //@ no-auto-check-cfg
 //@ compile-flags: --check-cfg=cfg()
 //@ normalize-stderr: "and \d+ more" -> "and X more"
-//@ normalize-stderr: "`[a-zA-Z0-9_\.-]+`" -> "`xxx`"
+//@ normalize-stderr: "`[a-zA-Z0-9_-]+`" -> "`xxx`"
 
 fn main() {
     cfg!(target_feature = "zebra");

tests/ui/check-cfg/target_feature.stderr

@@ -29,8 +29,6 @@ LL |     cfg!(target_feature = "_UNEXPECTED_VALUE");
 `amx-transpose`
 `atomics`
 `avx`
-`avx10.1`
-`avx10.2`
 `avx2`
 `avx512bf16`
 `avx512bitalg`