NCG: validate fixes for i386-darwin

compiler/nativeGen/X86/Ppr.hs

@@ -43,7 +43,9 @@ import Outputable	(panic, Outputable)
 
 import Data.Word
 
-
+#if i386_TARGET_ARCH && darwin_TARGET_OS
+import Data.Bits
+#endif
 
 -- -----------------------------------------------------------------------------
 -- Printing this stuff out
@@ -96,7 +98,13 @@ pprData :: CmmStatic -> Doc
 pprData (CmmAlign bytes)         = pprAlign bytes
 pprData (CmmDataLabel lbl)       = pprLabel lbl
 pprData (CmmString str)          = pprASCII str
+
+#if  darwin_TARGET_OS
+pprData (CmmUninitialised bytes) = ptext (sLit ".space ") <> int bytes
+#else
 pprData (CmmUninitialised bytes) = ptext (sLit ".skip ") <> int bytes
+#endif
+
 pprData (CmmStaticLit lit)       = pprDataItem lit
 
 pprGloblDecl :: CLabel -> Doc