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

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157139 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 17 insertions, 0 deletions

diff --git a/include/clang/Basic/DiagnosticSemaKinds.td b/include/clang/Basic/DiagnosticSemaKinds.td
index b3ae3aa4cf..d2292af468 100644
--- a/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/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/lib/Sema/SemaExprCXX.cpp b/lib/Sema/SemaExprCXX.cpp
index 3400529c76..efc13a9284 100644
--- a/lib/Sema/SemaExprCXX.cpp
+++ b/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/test/SemaCXX/no-rtti.cpp b/test/SemaCXX/no-rtti.cpp
new file mode 100644
index 0000000000..75167050dc
--- /dev/null
+++ b/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}}
+}