re PR sanitizer/80063 (gcc/asan.c: PVS-Studio: Incorrect Block Delimitation (CWE-483))

	PR sanitizer/80063
	* asan.c (DEF_SANITIZER_BUILTIN): Use do { } while (0).

From-SVN: r246278

gcc/ChangeLog

+2017-03-20  Marek Polacek  <polacek@redhat.com>
+
+	PR sanitizer/80063
+	* asan.c (DEF_SANITIZER_BUILTIN): Use do { } while (0).
+
 2017-03-20  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/80113

gcc/asan.c

@@ -2567,10 +2567,12 @@ initialize_sanitizer_builtins (void)
 #define DEF_BUILTIN_STUB(ENUM, NAME)
 #undef DEF_SANITIZER_BUILTIN
 #define DEF_SANITIZER_BUILTIN(ENUM, NAME, TYPE, ATTRS) \
-  decl = add_builtin_function ("__builtin_" NAME, TYPE, ENUM,		\
-			       BUILT_IN_NORMAL, NAME, NULL_TREE);	\
-  set_call_expr_flags (decl, ATTRS);					\
-  set_builtin_decl (ENUM, decl, true);
+  do {									\
+    decl = add_builtin_function ("__builtin_" NAME, TYPE, ENUM,		\
+				 BUILT_IN_NORMAL, NAME, NULL_TREE);	\
+    set_call_expr_flags (decl, ATTRS);					\
+    set_builtin_decl (ENUM, decl, true);				\
+  } while (0);
 
 #include "sanitizer.def"