Fix a regression from 171193: main cannot be overloaded.

Thanks Eli Friedman for noticing it.

llvm-svn: 172292

clang/lib/Sema/SemaOverload.cpp

@@ -935,6 +935,11 @@ static bool canBeOverloaded(const FunctionDecl &D) {
     return true;
   if (D.hasCLanguageLinkage())
     return false;
+
+  // Main cannot be overloaded (basic.start.main).
+  if (D.isMain())
+    return false;
+
   return true;
 }
 

clang/test/SemaCXX/overload-decl.cpp

@@ -29,3 +29,6 @@ class X {
   static void g(float);
   static void g(int); // expected-error {{static and non-static member functions with the same parameter types cannot be overloaded}}
 };
+
+int main() {} // expected-note {{previous definition is here}}
+int main(int,char**) {} // expected-error {{conflicting types for 'main'}}