1 files changed, 25 insertions, 2 deletions
diff --git a/include/clang/Basic/Attr.td b/include/clang/Basic/Attr.td
index e3c2b0e45d3d..fa60d512a6ff 100644
--- a/include/clang/Basic/Attr.td
+++ b/include/clang/Basic/Attr.td
@@ -140,12 +140,15 @@ class Argument<string name, bit optional, bit fake = 0> {
   bit Fake = fake;
 }
 
-class BoolArgument<string name, bit opt = 0> : Argument<name, opt>;
+class BoolArgument<string name, bit opt = 0, bit fake = 0> : Argument<name, opt,
+                                                                      fake>;
 class IdentifierArgument<string name, bit opt = 0> : Argument<name, opt>;
 class IntArgument<string name, bit opt = 0> : Argument<name, opt>;
 class StringArgument<string name, bit opt = 0> : Argument<name, opt>;
 class ExprArgument<string name, bit opt = 0> : Argument<name, opt>;
-class FunctionArgument<string name, bit opt = 0> : Argument<name, opt>;
+class FunctionArgument<string name, bit opt = 0, bit fake = 0> : Argument<name,
+                                                                          opt,
+                                                                          fake>;
 class TypeArgument<string name, bit opt = 0> : Argument<name, opt>;
 class UnsignedArgument<string name, bit opt = 0> : Argument<name, opt>;
 class VariadicUnsignedArgument<string name> : Argument<name, 1>;
@@ -1591,6 +1594,26 @@ def Unavailable : InheritableAttr {
   let Documentation = [Undocumented];
 }
 
+def DiagnoseIf : InheritableAttr {
+  let Spellings = [GNU<"diagnose_if">];
+  let Subjects = SubjectList<[Function]>;
+  let Args = [ExprArgument<"Cond">, StringArgument<"Message">,
+              EnumArgument<"DiagnosticType",
+                           "DiagnosticType",
+                           ["error", "warning"],
+                           ["DT_Error", "DT_Warning"]>,
+              BoolArgument<"ArgDependent", 0, /*fake*/ 1>,
+              FunctionArgument<"Parent", 0, /*fake*/ 1>];
+  let DuplicatesAllowedWhileMerging = 1;
+  let LateParsed = 1;
+  let AdditionalMembers = [{
+    bool isError() const { return diagnosticType == DT_Error; }
+    bool isWarning() const { return diagnosticType == DT_Warning; }
+  }];
+  let TemplateDependent = 1;
+  let Documentation = [DiagnoseIfDocs];
+}
+
 def ArcWeakrefUnavailable : InheritableAttr {
   let Spellings = [GNU<"objc_arc_weak_reference_unavailable">];
   let Subjects = SubjectList<[ObjCInterface], ErrorDiag>;