Rollup merge of #90537 - adamgemmell:dev/aarch64-target-feature, r=Amanieu

Update aarch64 `target_feature` list for LLVM 12.

Many of these feature are now available on all valid LLVM versions.

I've also added a few new ones to the list.

r? `@Amanieu`

Author: JohnTitor

compiler/rustc_codegen_llvm/src/llvm_util.rs

@@ -180,6 +180,7 @@ pub fn to_llvm_feature<'a>(sess: &Session, s: &'a str) -> Vec<&'a str> {
         ("aarch64", "dpb2") => vec!["ccdp"],
         ("aarch64", "frintts") => vec!["fptoint"],
         ("aarch64", "fcma") => vec!["complxnum"],
+        ("aarch64", "pmuv3") => vec!["perfmon"],
         (_, s) => vec![s],
     }
 }

compiler/rustc_codegen_ssa/src/target_features.rs

@@ -36,7 +36,6 @@ const ARM_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
     ("thumb-mode", Some(sym::arm_target_feature)),
 ];
 
-// 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)),
@@ -67,13 +66,13 @@ const AARCH64_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
     // FEAT_DIT
     ("dit", Some(sym::aarch64_target_feature)),
     // FEAT_FLAGM
-    // ("flagm", Some(sym::aarch64_target_feature)),
+    ("flagm", Some(sym::aarch64_target_feature)),
     // FEAT_SSBS
     ("ssbs", Some(sym::aarch64_target_feature)),
     // FEAT_SB
     ("sb", Some(sym::aarch64_target_feature)),
     // FEAT_PAUTH
-    // ("pauth", Some(sym::aarch64_target_feature)),
+    ("pauth", Some(sym::aarch64_target_feature)),
     // FEAT_DPB
     ("dpb", Some(sym::aarch64_target_feature)),
     // FEAT_DPB2
@@ -93,11 +92,11 @@ const AARCH64_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
     // FEAT_I8MM
     ("i8mm", Some(sym::aarch64_target_feature)),
     // FEAT_F32MM
-    // ("f32mm", Some(sym::aarch64_target_feature)),
+    ("f32mm", Some(sym::aarch64_target_feature)),
     // FEAT_F64MM
-    // ("f64mm", Some(sym::aarch64_target_feature)),
+    ("f64mm", Some(sym::aarch64_target_feature)),
     // FEAT_BF16
-    // ("bf16", Some(sym::aarch64_target_feature)),
+    ("bf16", Some(sym::aarch64_target_feature)),
     // FEAT_RAND
     ("rand", Some(sym::aarch64_target_feature)),
     // FEAT_BTI
@@ -116,13 +115,23 @@ const AARCH64_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[
     ("sha3", Some(sym::aarch64_target_feature)),
     // FEAT_SM3 & FEAT_SM4
     ("sm4", Some(sym::aarch64_target_feature)),
+    // FEAT_PAN
+    ("pan", Some(sym::aarch64_target_feature)),
+    // FEAT_LOR
+    ("lor", Some(sym::aarch64_target_feature)),
+    // FEAT_VHE
+    ("vh", Some(sym::aarch64_target_feature)),
+    // FEAT_PMUv3
+    ("pmuv3", Some(sym::aarch64_target_feature)),
+    // FEAT_SPE
+    ("spe", Some(sym::aarch64_target_feature)),
     ("v8.1a", Some(sym::aarch64_target_feature)),
     ("v8.2a", Some(sym::aarch64_target_feature)),
     ("v8.3a", Some(sym::aarch64_target_feature)),
     ("v8.4a", Some(sym::aarch64_target_feature)),
     ("v8.5a", Some(sym::aarch64_target_feature)),
-    // ("v8.6a", Some(sym::aarch64_target_feature)),
-    // ("v8.7a", Some(sym::aarch64_target_feature)),
+    ("v8.6a", Some(sym::aarch64_target_feature)),
+    ("v8.7a", Some(sym::aarch64_target_feature)),
 ];
 
 const X86_ALLOWED_FEATURES: &[(&str, Option<Symbol>)] = &[