rustc_target: aarch64: Remove deprecated FEAT_TME

ARM has withdrawn FEAT_TME

https://developer.arm.com/documentation/102105/lb-05/

LLVM has dropped support for it recently as a result.

Author: maurer

compiler/rustc_target/src/target_features.rs

@@ -337,8 +337,6 @@ static AARCH64_FEATURES: &[(&str, Stability, ImpliedFeatures)] = &[
     ("sve2-sm4", Stable, &["sve2", "sm4"]),
     // FEAT_SVE2p1
     ("sve2p1", Unstable(sym::aarch64_unstable_target_feature), &["sve2"]),
-    // FEAT_TME
-    ("tme", Stable, &[]),
     (
         "v8.1a",
         Unstable(sym::aarch64_ver_target_feature),

library/std/tests/run-time-detect.rs

@@ -106,7 +106,6 @@ fn aarch64_linux() {
     println!("sve2: {}", is_aarch64_feature_detected!("sve2"));
     println!("sve2p1: {}", is_aarch64_feature_detected!("sve2p1"));
     println!("sve: {}", is_aarch64_feature_detected!("sve"));
-    println!("tme: {}", is_aarch64_feature_detected!("tme"));
     println!("wfxt: {}", is_aarch64_feature_detected!("wfxt"));
     // tidy-alphabetical-end
 }

library/std_detect/src/detect/arch/aarch64.rs

@@ -90,7 +90,6 @@ features! {
     /// * `"sve2-sha3"` - FEAT_SVE2_SHA3
     /// * `"sve2-sm4"` - FEAT_SVE2_SM4
     /// * `"sve2p1"` - FEAT_SVE2p1
-    /// * `"tme"` - FEAT_TME
     /// * `"wfxt"` - FEAT_WFxT
     ///
     /// [docs]: https://developer.arm.com/documentation/ddi0487/latest
@@ -257,8 +256,6 @@ features! {
     /// FEAT_SVE_SHA3 (SVE2 SHA3 crypto)
     @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] sve2_sm4: "sve2-sm4";
     /// FEAT_SVE_SM4 (SVE2 SM4 crypto)
-    @FEATURE: #[stable(feature = "simd_aarch64", since = "1.60.0")] tme: "tme";
-    /// FEAT_TME (Transactional Memory Extensions)
     @FEATURE: #[unstable(feature = "stdarch_aarch64_feature_detection", issue = "127764")] wfxt: "wfxt";
     /// FEAT_WFxT (WFET and WFIT Instructions)
 }

library/std_detect/src/detect/os/aarch64.rs

@@ -84,7 +84,6 @@ pub(crate) fn parse_system_registers(
 
     // ID_AA64ISAR0_EL1 - Instruction Set Attribute Register 0
     enable_feature(Feature::pmull, bits_shift(aa64isar0, 7, 4) >= 2);
-    enable_feature(Feature::tme, bits_shift(aa64isar0, 27, 24) == 1);
     enable_feature(Feature::lse, bits_shift(aa64isar0, 23, 20) >= 2);
     enable_feature(Feature::crc, bits_shift(aa64isar0, 19, 16) >= 1);
 

library/std_detect/tests/cpu-detection.rs

@@ -85,7 +85,6 @@ fn aarch64_linux() {
     println!("rcpc2: {}", is_aarch64_feature_detected!("rcpc2"));
     println!("rcpc3: {}", is_aarch64_feature_detected!("rcpc3"));
     println!("dotprod: {}", is_aarch64_feature_detected!("dotprod"));
-    println!("tme: {}", is_aarch64_feature_detected!("tme"));
     println!("fhm: {}", is_aarch64_feature_detected!("fhm"));
     println!("dit: {}", is_aarch64_feature_detected!("dit"));
     println!("flagm: {}", is_aarch64_feature_detected!("flagm"));
@@ -175,7 +174,6 @@ fn aarch64_bsd() {
     println!("rdm: {:?}", is_aarch64_feature_detected!("rdm"));
     println!("rcpc: {:?}", is_aarch64_feature_detected!("rcpc"));
     println!("dotprod: {:?}", is_aarch64_feature_detected!("dotprod"));
-    println!("tme: {:?}", is_aarch64_feature_detected!("tme"));
     println!("paca: {:?}", is_aarch64_feature_detected!("paca"));
     println!("pacg: {:?}", is_aarch64_feature_detected!("pacg"));
     println!("aes: {:?}", is_aarch64_feature_detected!("aes"));

library/stdarch/ci/docker/aarch64-unknown-linux-gnu/Dockerfile

@@ -15,5 +15,4 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 
 ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc \
     CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_RUNNER="qemu-aarch64 -cpu max -L /usr/aarch64-linux-gnu" \
-    OBJDUMP=aarch64-linux-gnu-objdump \
-    STDARCH_TEST_SKIP_FEATURE=tme
+    OBJDUMP=aarch64-linux-gnu-objdump

library/stdarch/ci/docker/aarch64_be-unknown-linux-gnu/Dockerfile

@@ -27,4 +27,3 @@ ENV AARCH64_BE_LIBC="${AARCH64_BE_TOOLCHAIN}/aarch64_be-none-linux-gnu/libc"
 ENV CARGO_TARGET_AARCH64_BE_UNKNOWN_LINUX_GNU_LINKER="${AARCH64_BE_TOOLCHAIN}/bin/aarch64_be-none-linux-gnu-gcc"
 ENV CARGO_TARGET_AARCH64_BE_UNKNOWN_LINUX_GNU_RUNNER="qemu-aarch64_be -cpu max -L ${AARCH64_BE_LIBC}"
 ENV OBJDUMP="${AARCH64_BE_TOOLCHAIN}/bin/aarch64_be-none-linux-gnu-objdump"
-ENV STDARCH_TEST_SKIP_FEATURE=tme

library/stdarch/crates/core_arch/src/aarch64/mod.rs

@@ -21,10 +21,6 @@ mod neon;
 #[stable(feature = "neon_intrinsics", since = "1.59.0")]
 pub use self::neon::*;
 
-mod tme;
-#[unstable(feature = "stdarch_aarch64_tme", issue = "117216")]
-pub use self::tme::*;
-
 mod prefetch;
 #[unstable(feature = "stdarch_aarch64_prefetch", issue = "117217")]
 pub use self::prefetch::*;

library/stdarch/crates/core_arch/src/aarch64/tme.rs

@@ -78,7 +78,7 @@ pub(crate) fn disassemble_myself() -> HashSet<Function> {
     let objdump = env::var("OBJDUMP").unwrap_or_else(|_| "objdump".to_string());
     let add_args = if cfg!(target_vendor = "apple") && cfg!(target_arch = "aarch64") {
         // Target features need to be enabled for LLVM objdump on Darwin ARM64
-        vec!["--mattr=+v8.6a,+crypto,+tme"]
+        vec!["--mattr=+v8.6a,+crypto"]
     } else if cfg!(any(target_arch = "riscv32", target_arch = "riscv64")) {
         vec!["--mattr=+zk,+zks,+zbc,+zbb"]
     } else {