diff --git a/clang/include/clang/Driver/ToolChain.h b/clang/include/clang/Driver/ToolChain.h
--- a/clang/include/clang/Driver/ToolChain.h
+++ b/clang/include/clang/Driver/ToolChain.h
@@ -237,7 +237,13 @@
   StringRef getDefaultUniversalArchName() const;
 
   std::string getTripleString() const {
-    return Triple.getTriple();
+    if (!Triple.isOSDarwin())
+      return Triple.getTriple();
+    // Use the default architecture name (that's expected by -arch) for a
+    // Darwin triple to provide consistent triple output to the user.
+    llvm::Triple TT = Triple;
+    TT.setArchName(getDefaultUniversalArchName());
+    return TT.getTriple();
   }
 
   /// Get the toolchain's effective clang triple.
diff --git a/clang/test/Driver/aarch64-cpus.c b/clang/test/Driver/aarch64-cpus.c
--- a/clang/test/Driver/aarch64-cpus.c
+++ b/clang/test/Driver/aarch64-cpus.c
@@ -33,7 +33,7 @@
 // ARM64E-DARWIN: "-cc1"{{.*}} "-triple" "arm64e{{.*}}" "-target-cpu" "apple-a12"
 
 // RUN: %clang -target arm64-apple-darwin -arch arm64_32 -### -c %s 2>&1 | FileCheck -check-prefix=ARM64_32-DARWIN %s
-// ARM64_32-DARWIN: "-cc1"{{.*}} "-triple" "aarch64_32{{.*}}" "-target-cpu" "apple-s4"
+// ARM64_32-DARWIN: "-cc1"{{.*}} "-triple" "arm64_32{{.*}}" "-target-cpu" "apple-s4"
 
 // RUN: %clang -target aarch64 -mcpu=cortex-a35 -### -c %s 2>&1 | FileCheck -check-prefix=CA35 %s
 // RUN: %clang -target aarch64 -mlittle-endian -mcpu=cortex-a35 -### -c %s 2>&1 | FileCheck -check-prefix=CA35 %s
diff --git a/clang/test/Driver/arm64_32-link.c b/clang/test/Driver/arm64_32-link.c
--- a/clang/test/Driver/arm64_32-link.c
+++ b/clang/test/Driver/arm64_32-link.c
@@ -1,4 +1,4 @@
 // RUN: %clang -target x86_64-apple-darwin -arch arm64_32 -miphoneos-version-min=8.0 %s -### 2>&1 | FileCheck %s
 
-// CHECK: "-cc1"{{.*}} "-triple" "aarch64_32-apple-ios8.0.0"
+// CHECK: "-cc1"{{.*}} "-triple" "arm64_32-apple-ios8.0.0"
 // CHECK: ld{{.*}} "-arch" "arm64_32"
diff --git a/clang/test/Driver/default-toolchain.c b/clang/test/Driver/default-toolchain.c
--- a/clang/test/Driver/default-toolchain.c
+++ b/clang/test/Driver/default-toolchain.c
@@ -2,7 +2,10 @@
 // RUN: grep 'Target: x86_64-unknown-unknown' %t
 
 // RUN: %clang -target i386-apple-darwin9 -arch ppc -m64 -v 2> %t
-// RUN: grep 'Target: powerpc64-apple-darwin9' %t
+// RUN: grep 'Target: ppc64-apple-darwin9' %t
 
 // RUN: %clang -target i386-apple-darwin9 -arch ppc64 -m32 -v 2> %t
-// RUN: grep 'Target: powerpc-apple-darwin9' %t
+// RUN: grep 'Target: ppc-apple-darwin9' %t
+
+// RUN: %clang -target x86_64-apple-macos11 -arch arm64 -v 2>&1 | FileCheck --check-prefix=ARM64 %s
+// ARM64: Target: arm64-apple-macos11