Error when using typeid() with -fno-rtti. PR 12888.

llvm-svn: 157139
llvm · May 20, 2012 · 1b7f39d · 1b7f39d
1 parent 0229000
commit 1b7f39d
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diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -4392,6 +4392,9 @@ def err_invalid_declarator_in_function : Error<
 def err_not_tag_in_scope : Error<
   "no %select{struct|union|class|enum}0 named %1 in %2">;
 
+def err_no_typeid_with_fno_rtti : Error<
+  "cannot use typeid with -fno-rtti">;
+
 def err_cannot_form_pointer_to_member_of_reference_type : Error<
   "cannot form a pointer-to-member to member %0 of reference type %1">;
 def err_incomplete_object_call : Error<

diff --git a/clang/lib/Sema/SemaExprCXX.cpp b/clang/lib/Sema/SemaExprCXX.cpp
@@ -379,6 +379,10 @@ Sema::ActOnCXXTypeid(SourceLocation OpLoc, SourceLocation LParenLoc,
       return ExprError(Diag(OpLoc, diag::err_need_header_before_typeid));
   }
 
+  if (!getLangOpts().RTTI) {
+    return ExprError(Diag(OpLoc, diag::err_no_typeid_with_fno_rtti));
+  }
+
   QualType TypeInfoType = Context.getTypeDeclType(CXXTypeInfoDecl);
 
   if (isType) {

diff --git a/clang/test/SemaCXX/no-rtti.cpp b/clang/test/SemaCXX/no-rtti.cpp
@@ -0,0 +1,10 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -fno-rtti %s
+
+namespace std {
+  class type_info;
+}
+
+void f()
+{
+  (void)typeid(int); // expected-error {{cannot use typeid with -fno-rtti}}
+}