diff --git a/lib/DebugInfo/DWARFDebugAbbrev.cpp b/lib/DebugInfo/DWARFDebugAbbrev.cpp
index a11ae3f2908..6e6c37e3094 100644
--- a/lib/DebugInfo/DWARFDebugAbbrev.cpp
+++ b/lib/DebugInfo/DWARFDebugAbbrev.cpp
@@ -83,7 +83,7 @@ void DWARFDebugAbbrev::dump(raw_ostream &OS) const {
 
   DWARFAbbreviationDeclarationCollMapConstIter pos;
   for (pos = AbbrevCollMap.begin(); pos != AbbrevCollMap.end(); ++pos) {
-    OS << format("Abbrev table for offset: 0x%8.8x\n", pos->first);
+    OS << format("Abbrev table for offset: 0x%8.8" PRIx64 "\n", pos->first);
     pos->second.dump(OS);
   }
 }
diff --git a/lib/DebugInfo/DWARFDebugAbbrev.h b/lib/DebugInfo/DWARFDebugAbbrev.h
index 03189b13212..c7c0436866c 100644
--- a/lib/DebugInfo/DWARFDebugAbbrev.h
+++ b/lib/DebugInfo/DWARFDebugAbbrev.h
@@ -25,21 +25,21 @@ typedef DWARFAbbreviationDeclarationColl::const_iterator
   DWARFAbbreviationDeclarationCollConstIter;
 
 class DWARFAbbreviationDeclarationSet {
-  uint64_t Offset;
+  uint32_t Offset;
   uint32_t IdxOffset;
   std::vector<DWARFAbbreviationDeclaration> Decls;
   public:
   DWARFAbbreviationDeclarationSet()
     : Offset(0), IdxOffset(0) {}
 
-  DWARFAbbreviationDeclarationSet(uint64_t offset, uint32_t idxOffset)
+  DWARFAbbreviationDeclarationSet(uint32_t offset, uint32_t idxOffset)
     : Offset(offset), IdxOffset(idxOffset) {}
 
   void clear() {
     IdxOffset = 0;
     Decls.clear();
   }
-  uint64_t getOffset() const { return Offset; }
+  uint32_t getOffset() const { return Offset; }
   void dump(raw_ostream &OS) const;
   bool extract(DataExtractor data, uint32_t* offset_ptr);
 
diff --git a/lib/DebugInfo/DWARFDebugLine.cpp b/lib/DebugInfo/DWARFDebugLine.cpp
index 0248ad3fcbb..117fa31aa86 100644
--- a/lib/DebugInfo/DWARFDebugLine.cpp
+++ b/lib/DebugInfo/DWARFDebugLine.cpp
@@ -41,8 +41,9 @@ void DWARFDebugLine::Prologue::dump(raw_ostream &OS) const {
           "----------------\n";
     for (uint32_t i = 0; i < FileNames.size(); ++i) {
       const FileNameEntry& fileEntry = FileNames[i];
-      OS << format("file_names[%3u] %4u ", i+1, fileEntry.DirIdx)
-         << format("0x%8.8x 0x%8.8x ", fileEntry.ModTime, fileEntry.Length)
+      OS << format("file_names[%3u] %4" PRIu64 " ", i+1, fileEntry.DirIdx)
+         << format("0x%8.8" PRIx64 " 0x%8.8" PRIx64 " ",
+                   fileEntry.ModTime, fileEntry.Length)
          << fileEntry.Name << '\n';
     }
   }
diff --git a/lib/DebugInfo/DWARFFormValue.cpp b/lib/DebugInfo/DWARFFormValue.cpp
index 86e28bd2e82..1c7b9d7f493 100644
--- a/lib/DebugInfo/DWARFFormValue.cpp
+++ b/lib/DebugInfo/DWARFFormValue.cpp
@@ -263,12 +263,12 @@ DWARFFormValue::dump(raw_ostream &OS, const DWARFCompileUnit *cu) const {
   bool cu_relative_offset = false;
 
   switch (Form) {
-  case DW_FORM_addr:      OS << format("0x%016x", uvalue); break;
+  case DW_FORM_addr:      OS << format("0x%016" PRIx64, uvalue); break;
   case DW_FORM_flag:
-  case DW_FORM_data1:     OS << format("0x%02x", uvalue);  break;
-  case DW_FORM_data2:     OS << format("0x%04x", uvalue);  break;
-  case DW_FORM_data4:     OS << format("0x%08x", uvalue);  break;
-  case DW_FORM_data8:     OS << format("0x%016x", uvalue); break;
+  case DW_FORM_data1:     OS << format("0x%02x", (uint8_t)uvalue); break;
+  case DW_FORM_data2:     OS << format("0x%04x", (uint16_t)uvalue); break;
+  case DW_FORM_data4:     OS << format("0x%08x", (uint32_t)uvalue); break;
+  case DW_FORM_data8:     OS << format("0x%016" PRIx64, uvalue); break;
   case DW_FORM_string:
     OS << '"';
     OS.write_escaped(getAsCString(NULL));
@@ -314,7 +314,7 @@ DWARFFormValue::dump(raw_ostream &OS, const DWARFCompileUnit *cu) const {
     break;
   }
   case DW_FORM_ref_addr:
-    OS << format("0x%016x", uvalue);
+    OS << format("0x%016" PRIx64, uvalue);
     break;
   case DW_FORM_ref1:
     cu_relative_offset = true;
@@ -348,7 +348,7 @@ DWARFFormValue::dump(raw_ostream &OS, const DWARFCompileUnit *cu) const {
   }
 
   if (cu_relative_offset)
-    OS << format(" => {0x%8.8x}", (uvalue + (cu ? cu->getOffset() : 0)));
+    OS << format(" => {0x%8.8"PRIx64"}", (uvalue + (cu ? cu->getOffset() : 0)));
 }
 
 const char*