Move outline-atomics to aarch64-linux target definitions

compiler/rustc_codegen_llvm/src/llvm_util.rs

@@ -406,11 +406,6 @@ pub fn llvm_global_features(sess: &Session) -> Vec<String> {
     // -Ctarget-features
     features.extend(sess.opts.cg.target_feature.split(',').flat_map(&filter));
 
-    // FIXME: Move outline-atomics to target definition when earliest supported LLVM is 12.
-    if get_version() >= (12, 0, 0) && sess.target.llvm_target.contains("aarch64-unknown-linux") {
-        features.push("+outline-atomics".to_string());
-    }
-
     features
 }
 

compiler/rustc_target/src/spec/aarch64_be_unknown_linux_gnu.rs

@@ -8,6 +8,7 @@ pub fn target() -> Target {
         data_layout: "E-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128".to_string(),
         arch: "aarch64".to_string(),
         options: TargetOptions {
+            features: "+outline-atomics".to_string(),
             max_atomic_width: Some(128),
             mcount: "\u{1}_mcount".to_string(),
             endian: Endian::Big,

compiler/rustc_target/src/spec/aarch64_be_unknown_linux_gnu_ilp32.rs

@@ -12,6 +12,7 @@ pub fn target() -> Target {
         arch: "aarch64".to_string(),
         options: TargetOptions {
             abi: "ilp32".to_string(),
+            features: "+outline-atomics".to_string(),
             mcount: "\u{1}_mcount".to_string(),
             endian: Endian::Big,
             ..base

compiler/rustc_target/src/spec/aarch64_unknown_linux_gnu.rs

@@ -7,6 +7,7 @@ pub fn target() -> Target {
         data_layout: "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128".to_string(),
         arch: "aarch64".to_string(),
         options: TargetOptions {
+            features: "+outline-atomics".to_string(),
             mcount: "\u{1}_mcount".to_string(),
             max_atomic_width: Some(128),
             supported_sanitizers: SanitizerSet::ADDRESS

compiler/rustc_target/src/spec/aarch64_unknown_linux_gnu_ilp32.rs

@@ -8,6 +8,7 @@ pub fn target() -> Target {
         arch: "aarch64".to_string(),
         options: TargetOptions {
             abi: "ilp32".to_string(),
+            features: "+outline-atomics".to_string(),
             max_atomic_width: Some(128),
             mcount: "\u{1}_mcount".to_string(),
             ..super::linux_gnu_base::opts()

compiler/rustc_target/src/spec/aarch64_unknown_linux_musl.rs

@@ -9,6 +9,10 @@ pub fn target() -> Target {
         pointer_width: 64,
         data_layout: "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128".to_string(),
         arch: "aarch64".to_string(),
-        options: TargetOptions { mcount: "\u{1}_mcount".to_string(), ..base },
+        options: TargetOptions {
+            features: "+outline-atomics".to_string(),
+            mcount: "\u{1}_mcount".to_string(),
+            ..base
+        },
     }
 }