Index: lib/Target/AArch64/AArch64TargetMachine.cpp
===================================================================
--- lib/Target/AArch64/AArch64TargetMachine.cpp
+++ lib/Target/AArch64/AArch64TargetMachine.cpp
@@ -182,7 +182,7 @@
   if (TT.isOSBinFormatMachO())
     return "e-m:o-i64:64-i128:128-n32:64-S128";
   if (TT.isOSBinFormatCOFF())
-    return "e-m:w-i64:64-i128:128-n32:64-S128";
+    return "e-m:w-p:64:64-i32:32-i64:64-i128:128:128";
   if (LittleEndian)
     return "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128";
   return "E-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128";