Index: lib/Frontend/InitPreprocessor.cpp
===================================================================
--- lib/Frontend/InitPreprocessor.cpp
+++ lib/Frontend/InitPreprocessor.cpp
@@ -870,16 +870,18 @@
   if (!TargetInfo::isTypeSigned(TI.getWIntType()))
     Builder.defineMacro("__WINT_UNSIGNED__");
 
+  unsigned SizeTypeWidth = TI.getTypeWidth(TI.getSizeType());
+
   // Define exact-width integer types for stdint.h
   DefineExactWidthIntType(TargetInfo::SignedChar, TI, Builder);
 
   if (TI.getShortWidth() > TI.getCharWidth())
     DefineExactWidthIntType(TargetInfo::SignedShort, TI, Builder);
 
-  if (TI.getIntWidth() > TI.getShortWidth())
+  if (TI.getIntWidth() > TI.getShortWidth() && !(TI.getIntWidth() == SizeTypeWidth && TI.getSignedSizeType() != TargetInfo::SignedInt))
     DefineExactWidthIntType(TargetInfo::SignedInt, TI, Builder);
 
-  if (TI.getLongWidth() > TI.getIntWidth())
+  if (TI.getLongWidth() > TI.getIntWidth() || TI.getSignedSizeType() == TargetInfo::SignedLong)
     DefineExactWidthIntType(TargetInfo::SignedLong, TI, Builder);
 
   if (TI.getLongLongWidth() > TI.getLongWidth())
@@ -895,13 +897,13 @@
     DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder);
   }
 
-  if (TI.getIntWidth() > TI.getShortWidth()) {
+  if (TI.getIntWidth() > TI.getShortWidth() && !(TI.getIntWidth() == SizeTypeWidth && TI.getSizeType() != TargetInfo::UnsignedInt)) {
     DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder);
     DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder);
     DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder);
   }
 
-  if (TI.getLongWidth() > TI.getIntWidth()) {
+  if (TI.getLongWidth() > TI.getIntWidth() || TI.getSizeType() == TargetInfo::UnsignedLong) {
     DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder);
     DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder);
     DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder);