Remove LSE2

Author: adamgemmell

compiler/rustc_codegen_llvm/src/llvm_util.rs

@@ -153,7 +153,6 @@ pub fn to_llvm_feature<'a>(sess: &Session, s: &'a str) -> &'a str {
         ("aarch64", "fp") => "fp-armv8",
         ("aarch64", "fp16") => "fullfp16",
         ("aarch64", "fhm") => "fp16fml",
-        ("aarch64", "lse2") => "outline-atomics",
         ("aarch64", "rcpc2") => "rcpc-immo",
         ("aarch64", "dpb") => "ccpp",
         ("aarch64", "dpb2") => "ccdp",

compiler/rustc_codegen_ssa/src/target_features.rs

@@ -33,7 +33,7 @@ const ARM_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
     ("thumb-mode", Some(sym::arm_target_feature)),
 ];
 
-// Commented features are not available in LLVM 9.0, or have since been renamed
+// Commented features are not available in LLVM 10.0, or have since been renamed
 const AARCH64_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
     // FEAT_AdvSimd
     ("neon", Some(sym::aarch64_target_feature)),
@@ -51,8 +51,6 @@ const AARCH64_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
     ("ras", Some(sym::aarch64_target_feature)),
     // FEAT_LSE
     ("lse", Some(sym::aarch64_target_feature)),
-    // FEAT_LSE2
-    // ("lse2", Some(sym::aarch64_target_feature)),
     // FEAT_RDM
     ("rdm", Some(sym::aarch64_target_feature)),
     // FEAT_RCPC