Implements -Wundeclared-selector for ObjC.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@73495 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/Sema/SemaExprObjC.cpp b/lib/Sema/SemaExprObjC.cpp
index b6cf9d8e73..71033b4eed 100644
--- a/lib/Sema/SemaExprObjC.cpp
+++ b/lib/Sema/SemaExprObjC.cpp
@@ -130,6 +130,14 @@ Sema::ExprResult Sema::ParseObjCSelectorExpression(Selector Sel,
                                                    SourceLocation SelLoc,
                                                    SourceLocation LParenLoc,
                                                    SourceLocation RParenLoc) {
+  ObjCMethodDecl *Method = LookupInstanceMethodInGlobalPool(Sel, 
+                             SourceRange(LParenLoc, RParenLoc));
+  if (!Method)
+    Method = LookupFactoryMethodInGlobalPool(Sel,
+                                          SourceRange(LParenLoc, RParenLoc));
+  if (!Method)
+    Diag(SelLoc, diag::warn_undeclared_selector) << Sel;
+
   QualType Ty = Context.getObjCSelType();
   return new (Context) ObjCSelectorExpr(Ty, Sel, AtLoc, RParenLoc);
 }