1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c
index d8baad1..92aec31 100644
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -48,6 +48,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "value-prof.h"
 #include "diagnostic-core.h"
 #include "builtins.h"
+#include "ubsan.h"
 
 
 #ifndef PAD_VARARGS_DOWN
@@ -10303,6 +10304,11 @@ fold_builtin_0 (location_t loc, tree fndecl, bool ignore ATTRIBUTE_UNUSED)
     case BUILT_IN_CLASSIFY_TYPE:
       return fold_builtin_classify_type (NULL_TREE);
 
+    case BUILT_IN_UNREACHABLE:
+      if (flag_sanitize & SANITIZE_UNREACHABLE)
+	return ubsan_instrument_unreachable (loc);
+      break;
+
     default:
       break;
     }