Tidying

Author: DanBlackwell

Sources/SwiftDriver/Driver/Driver.swift

@@ -2818,7 +2818,7 @@ extension Driver {
       )
     }
 
-    // Address and memtag sanitizers can not be enabled concurrently.
+    // Address and memtag-stack sanitizers can not be enabled concurrently.
     if set.contains(.memtag_stack) && set.contains(.address) {
       diagnosticEngine.emit(
         .error_argument_not_allowed_with(

Sources/SwiftDriver/Toolchains/GenericUnixToolchain.swift

@@ -149,8 +149,11 @@ public final class GenericUnixToolchain: Toolchain {
     targetTriple: Triple,
     isShared: Bool
   ) throws -> String? {
+    guard let runtimeLibraryName = sanitizer.runtimeLibraryName else {
+      return nil
+    }
     let environment = (targetTriple.environment == .android) ? "-android" : ""
-    return "libclang_rt.\(sanitizer.runtimeLibraryName)-\(targetTriple.archName)\(environment).a"
+    return "libclang_rt.\(runtimeLibraryName)-\(targetTriple.archName)\(environment).a"
   }
 
   public func addPlatformSpecificCommonFrontendOptions(

Sources/SwiftDriver/Utilities/Sanitizer.swift

@@ -33,7 +33,7 @@ public enum Sanitizer: String, Hashable {
   /// Scudo hardened allocator
   case scudo
 
-  /// Memory tagging sanitizer (MemTag)
+  /// Memory-Tagging-based stack sanitizer
   case memtag_stack = "memtag-stack"
 
   /// Does this sanitizer have a runtime library