@@ -1526,8 +1526,9 @@ ipa_make_function_pure (struct cgraph_node *node, bool looping, bool local)
{
bool cdtor = false;
- if (DECL_PURE_P (node->decl)
- && (looping || !DECL_LOOPING_CONST_OR_PURE_P (node->decl)))
+ if (TREE_READONLY (node->decl)
+ || (DECL_PURE_P (node->decl)
+ && (looping || !DECL_LOOPING_CONST_OR_PURE_P (node->decl))))
return false;
warn_function_pure (node->decl, !looping);
if (local && skip_function_for_local_pure_const (node))
new file mode 100644
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -Wsuggest-attribute=pure" } */
+
+__attribute__((const))
+extern int do_expensive_calculation(void);
+
+__attribute__((const))
+int getval(void) /* { dg-bogus "candidate for attribute" } */
+{
+ static int cache = -1;
+ if (cache == -1)
+ cache = do_expensive_calculation();
+ return cache;
+}