Index: lib/Basic/Targets.cpp
===================================================================
--- lib/Basic/Targets.cpp
+++ lib/Basic/Targets.cpp
@@ -4874,7 +4874,7 @@
       // the frontend matches that.
       if (Triple.getEnvironment() == llvm::Triple::EABI ||
           Triple.getOS() == llvm::Triple::UnknownOS ||
-          StringRef(CPU).startswith("cortex-m")) {
+          ArchProfile == llvm::ARM::PK_M) {
         setABI("aapcs");
       } else if (Triple.isWatchABI()) {
         setABI("aapcs16");
@@ -5203,7 +5203,7 @@
     if (SoftFloat)
       Builder.defineMacro("__SOFTFP__");
 
-    if (CPU == "xscale")
+    if (ArchKind == llvm::ARM::AK_XSCALE)
       Builder.defineMacro("__XSCALE__");
 
     if (isThumb()) {
Index: lib/Driver/Tools.cpp
===================================================================
--- lib/Driver/Tools.cpp
+++ lib/Driver/Tools.cpp
@@ -7458,11 +7458,14 @@
 
 void darwin::setTripleTypeForMachOArchName(llvm::Triple &T, StringRef Str) {
   const llvm::Triple::ArchType Arch = getArchTypeForMachOArchName(Str);
+  unsigned ArchKind = llvm::ARM::parseArch(Str);
   T.setArch(Arch);
 
   if (Str == "x86_64h")
     T.setArchName(Str);
-  else if (Str == "armv6m" || Str == "armv7m" || Str == "armv7em") {
+  else if (ArchKind == llvm::ARM::AK_ARMV6M ||
+           ArchKind == llvm::ARM::AK_ARMV7M ||
+           ArchKind == llvm::ARM::AK_ARMV7EM) {
     T.setOS(llvm::Triple::UnknownOS);
     T.setObjectFormat(llvm::Triple::MachO);
   }