Re: Fix PR ipa/60315 (inliner explosion)

[Jan Hubicka]

> > Actually after some additional invetstigation I decided to commit this
> > patch. fixup_noreturn_call already cares about the return value but
> > differently than the new Jakub's code. 
> 
> Thanks for the quick fix, I confirm that the ACATS failures are all gone.
> 
> So we're left with the GIMPLE checking failure on opt33.adb.

Hi,
this is the patch I just comitted.  It simply clears the static chain when 
needed.

Honza

        * cgraph.c (cgraph_redirect_edge_call_stmt_to_callee): Clear
        static chain if needed.
        * gnat.dg/opt33.adb: New testcase.
Index: cgraph.c
===================================================================
--- cgraph.c    (revision 208915)
+++ cgraph.c    (working copy)
@@ -1488,6 +1488,14 @@ cgraph_redirect_edge_call_stmt_to_callee
          gsi_insert_before (&gsi, set_stmt, GSI_SAME_STMT);
        }
       gimple_call_set_lhs (new_stmt, NULL_TREE);
+      update_stmt_fn (DECL_STRUCT_FUNCTION (e->caller->decl), new_stmt);
+    }
+
+  /* If new callee has no static chain, remove it.  */
+  if (gimple_call_chain (new_stmt) && !DECL_STATIC_CHAIN (e->callee->decl))
+    {
+      gimple_call_set_chain (new_stmt, NULL);
+      update_stmt_fn (DECL_STRUCT_FUNCTION (e->caller->decl), new_stmt);
     }
 
   cgraph_set_call_stmt_including_clones (e->caller, e->call_stmt, new_stmt, 
false);
Index: testsuite/gnat.dg/opt33.adb
===================================================================
--- testsuite/gnat.dg/opt33.adb (revision 0)
+++ testsuite/gnat.dg/opt33.adb (revision 0)
@@ -0,0 +1,41 @@
+-- { dg-do compile }
+-- { dg-options "-O" }
+
+with Ada.Containers.Ordered_Sets;
+with Ada.Strings.Unbounded;
+
+procedure Opt33 is
+
+   type Rec is record
+      Name : Ada.Strings.Unbounded.Unbounded_String;
+   end record;
+
+   function "<" (Left : Rec; Right : Rec) return Boolean;
+
+   package My_Ordered_Sets is new Ada.Containers.Ordered_Sets (Rec);
+
+   protected type Data is
+      procedure Do_It;
+   private
+      Set : My_Ordered_Sets.Set;
+   end Data;
+
+   function "<" (Left : Rec; Right : Rec) return Boolean is
+   begin
+      return False;
+   end "<";
+
+   protected body Data is
+      procedure Do_It is
+         procedure Dummy (Position : My_Ordered_Sets.Cursor) is
+         begin
+            null;
+         end;
+      begin
+         Set.Iterate (Dummy'Access);
+      end;
+   end Data;
+
+begin
+   null;
+end;