Index: cfe/trunk/include/clang/Basic/Diagnostic.h
===================================================================
--- cfe/trunk/include/clang/Basic/Diagnostic.h
+++ cfe/trunk/include/clang/Basic/Diagnostic.h
@@ -632,24 +632,22 @@
   /// Suppress all diagnostics, to silence the front end when we
   /// know that we don't want any more diagnostics to be passed along to the
   /// client
-  void setSuppressAllDiagnostics(bool Val = true) {
-    SuppressAllDiagnostics = Val;
-  }
+  void setSuppressAllDiagnostics(bool Val) { SuppressAllDiagnostics = Val; }
   bool getSuppressAllDiagnostics() const { return SuppressAllDiagnostics; }
 
   /// Set type eliding, to skip outputting same types occurring in
   /// template types.
-  void setElideType(bool Val = true) { ElideType = Val; }
+  void setElideType(bool Val) { ElideType = Val; }
   bool getElideType() { return ElideType; }
 
   /// Set tree printing, to outputting the template difference in a
   /// tree format.
-  void setPrintTemplateTree(bool Val = false) { PrintTemplateTree = Val; }
+  void setPrintTemplateTree(bool Val) { PrintTemplateTree = Val; }
   bool getPrintTemplateTree() { return PrintTemplateTree; }
 
   /// Set color printing, so the type diffing will inject color markers
   /// into the output.
-  void setShowColors(bool Val = false) { ShowColors = Val; }
+  void setShowColors(bool Val) { ShowColors = Val; }
   bool getShowColors() { return ShowColors; }
 
   /// Specify which overload candidates to show when overload resolution
@@ -667,7 +665,7 @@
   /// the middle of another diagnostic.
   ///
   /// This can be used by clients who suppress diagnostics themselves.
-  void setLastDiagnosticIgnored(bool Ignored = true) {
+  void setLastDiagnosticIgnored(bool Ignored) {
     if (LastDiagLevel == DiagnosticIDs::Fatal)
       FatalErrorOccurred = true;
     LastDiagLevel = Ignored ? DiagnosticIDs::Ignored : DiagnosticIDs::Warning;
Index: cfe/trunk/lib/ARCMigrate/ARCMT.cpp
===================================================================
--- cfe/trunk/lib/ARCMigrate/ARCMT.cpp
+++ cfe/trunk/lib/ARCMigrate/ARCMT.cpp
@@ -139,7 +139,7 @@
     }
 
     // Non-ARC warnings are ignored.
-    Diags.setLastDiagnosticIgnored();
+    Diags.setLastDiagnosticIgnored(true);
   }
 };
 
Index: cfe/trunk/lib/Frontend/FrontendActions.cpp
===================================================================
--- cfe/trunk/lib/Frontend/FrontendActions.cpp
+++ cfe/trunk/lib/Frontend/FrontendActions.cpp
@@ -928,7 +928,7 @@
     // 'expected' comments.
     if (CI.getDiagnosticOpts().VerifyDiagnostics) {
       // Make sure we don't emit new diagnostics!
-      CI.getDiagnostics().setSuppressAllDiagnostics();
+      CI.getDiagnostics().setSuppressAllDiagnostics(true);
       Preprocessor &PP = getCompilerInstance().getPreprocessor();
       PP.EnterMainSourceFile();
       Token Tok;
Index: cfe/trunk/lib/Sema/Sema.cpp
===================================================================
--- cfe/trunk/lib/Sema/Sema.cpp
+++ cfe/trunk/lib/Sema/Sema.cpp
@@ -1307,7 +1307,7 @@
                        PartialDiagnostic(DiagInfo, Context.getDiagAllocator()));
       }
 
-      Diags.setLastDiagnosticIgnored();
+      Diags.setLastDiagnosticIgnored(true);
       Diags.Clear();
       return;
 
@@ -1332,7 +1332,7 @@
                        PartialDiagnostic(DiagInfo, Context.getDiagAllocator()));
       }
 
-      Diags.setLastDiagnosticIgnored();
+      Diags.setLastDiagnosticIgnored(true);
       Diags.Clear();
 
       // Now the diagnostic state is clear, produce a C++98 compatibility
@@ -1341,7 +1341,7 @@
 
       // The last diagnostic which Sema produced was ignored. Suppress any
       // notes attached to it.
-      Diags.setLastDiagnosticIgnored();
+      Diags.setLastDiagnosticIgnored(true);
       return;
     }
 
@@ -1355,7 +1355,7 @@
       }
 
       // Suppress this diagnostic.
-      Diags.setLastDiagnosticIgnored();
+      Diags.setLastDiagnosticIgnored(true);
       Diags.Clear();
       return;
     }