Index: lldb/trunk/source/Host/windows/Host.cpp
===================================================================
--- lldb/trunk/source/Host/windows/Host.cpp
+++ lldb/trunk/source/Host/windows/Host.cpp
@@ -56,6 +56,10 @@
     triple.setArch(llvm::Triple::x86_64);
   else if (machineType == 0x14c)
     triple.setArch(llvm::Triple::x86);
+  else if (machineType == 0x1c4)
+    triple.setArch(llvm::Triple::arm);
+  else if (machineType == 0xaa64)
+    triple.setArch(llvm::Triple::aarch64);
 
   return true;
 }