@@ -851,6 +851,14 @@ process_function_and_variable_attributes (cgraph_node *first,
node = symtab->next_function (node))
{
tree decl = node->decl;
+
+ if (node->alias
+ && lookup_attribute ("flatten", DECL_ATTRIBUTES (decl)))
+ {
+ warning_at (DECL_SOURCE_LOCATION (node->decl), OPT_Wattributes,
+ "%<flatten%>"
+ " attribute attribute is ignored on aliases");
+ }
if (DECL_PRESERVE_P (decl))
node->mark_force_output ();
else if (lookup_attribute ("externally_visible", DECL_ATTRIBUTES (decl)))
@@ -2634,6 +2634,9 @@ ipa_inline (void)
{
node = order[i];
if (node->definition
+ /* Do not try to flatten aliases. These may happen for example when
+ creating local aliases. */
+ && !node->alias
&& lookup_attribute ("flatten",
DECL_ATTRIBUTES (node->decl)) != NULL)
order[j--] = order[i];
new file mode 100644
@@ -0,0 +1,16 @@
+int fn2(int);
+int fn3(int);
+
+__attribute__((flatten))
+int fn1(int p1)
+{
+ int a = fn2(p1);
+ return fn3(a);
+}
+__attribute__((flatten))
+int fn4(int p1)
+{
+ int j = fn2(p1);
+ return fn3(j);
+}
+
new file mode 100644
@@ -0,0 +1,18 @@
+/* { dg-require-alias "" } */
+int fn2(int);
+int fn3(int);
+
+__attribute__((flatten))
+int fn1(int p1)
+{
+ int a = fn2(p1);
+ return fn3(a);
+}
+__attribute__((flatten))
+__attribute__((alias("fn1"))) /* { dg-warning "ignored" } */
+int fn4(int p1);
+int
+test ()
+{
+ return fn4(1);
+}