[NFC] Fixup comments

Author: SpencerAbson

llvm/lib/TargetParser/AArch64TargetParser.cpp

@@ -253,10 +253,11 @@ void AArch64::ExtensionSet::disable(ArchExtKind E) {
     disable(AEK_SM4);
   }
 
-  // sve2-aes was historically associated with both FEAT_SVE2 and FEAT_SVE_AES, the latter
-  // is now associated with sve-aes and sve2-aes has become shorthand for +sve2+sve-aes.
-  // For backwards compatibility, when we disable sve2-aes we must also disable sve-aes.
-  if(E == AEK_SVE2AES)
+  // sve2-aes was historically associated with both FEAT_SVE2 and FEAT_SVE_AES,
+  // the latter is now associated with sve-aes and sve2-aes has become shorthand
+  // for +sve2+sve-aes. For backwards compatibility, when we disable sve2-aes we
+  // must also disable sve-aes.
+  if (E == AEK_SVE2AES)
     disable(AEK_SVEAES);
 
   if (!Enabled.test(E))

llvm/test/MC/AArch64/SVE2/directive-arch-negative.s

@@ -11,6 +11,7 @@ aesd z23.b, z23.b, z13.b
 // CHECK: error: instruction requires: sve-aes
 // CHECK-NEXT: aesd z23.b, z23.b, z13.b
 
+// nosve2-aes should disable sve-aes but not sve2.
 .arch armv9-a+sve2-aes+nosve2-aes
 aesd z23.b, z23.b, z13.b
 // CHECK: error: instruction requires: sve-aes

llvm/test/MC/AArch64/SVE2/directive-arch_extension-negative.s

@@ -12,6 +12,7 @@ aesd z23.b, z23.b, z13.b
 // CHECK: error: instruction requires: sve2 sve-aes
 // CHECK-NEXT: aesd z23.b, z23.b, z13.b
 
+// nosve2-aes should disable sve-aes but not sve2.
 .arch_extension sve2-aes
 .arch_extension nosve2-aes
 aesd z23.b, z23.b, z13.b

llvm/test/MC/AArch64/SVE2/directive-cpu-negative.s

@@ -6,6 +6,7 @@ tbx z0.b, z1.b, z2.b
 // CHECK: error: instruction requires: sve2 or sme
 // CHECK-NEXT: tbx z0.b, z1.b, z2.b
 
+// nosve2-aes should disable sve-aes but not sve2.
 .cpu generic+sve2-aes+nosve2-aes
 aesd z23.b, z23.b, z13.b
 // CHECK: error: instruction requires: sve-aes