Index: lib/Target/ARM/ARMBaseRegisterInfo.cpp
===================================================================
--- lib/Target/ARM/ARMBaseRegisterInfo.cpp
+++ lib/Target/ARM/ARMBaseRegisterInfo.cpp
@@ -92,7 +92,7 @@
     }
   }
 
-  if (STI.isTargetDarwin() && STI.getTargetLowering()->supportSwiftError() &&
+  if (STI.getTargetLowering()->supportSwiftError() &&
       F->getAttributes().hasAttrSomewhere(Attribute::SwiftError))
     return CSR_iOS_SwiftError_SaveList;
 
@@ -120,7 +120,7 @@
     // This is academic because all GHC calls are (supposed to be) tail calls
     return CSR_NoRegs_RegMask;
 
-  if (STI.isTargetDarwin() && STI.getTargetLowering()->supportSwiftError() &&
+  if (STI.getTargetLowering()->supportSwiftError() &&
       MF.getFunction()->getAttributes().hasAttrSomewhere(Attribute::SwiftError))
     return CSR_iOS_SwiftError_RegMask;