[patch]: Fix PR target/64212

[patch]: Fix PR target/64212

[Kai Tietz]

Hi,

The issue here is a pe-coff target specific thing that
dllimported-symbols have an noninterposable, and an interposable part.
The dllimport address itself is not interposable, but its stubbing
function/var is.

So the hook binds_to_local has to return false for dllimport,
nevertheless for clones we want that they getting interposable.
Therefore - as suggested by Honza - we need to make explicit sure that
we set DECL_DLLIMPORT_P() explicit to 0 in symtab.

ChangeLog

2015-02-25  Kai Tietz  <ktietz@redhat.com>

    PR target/64212
    * symtab.c (symtab::make_decl_local): Set DECL_IMPORT_P explicit to 0.
    (symtab::noninterposable_alias): Likewise.

Tested for x86_64-w64-mingw32, i686-w64-mingw32, and
x86_64-unknown-linux-gnu.  Ok for apply?

Regards,
Kai

Index: symtab.c
===================================================================
--- symtab.c    (Revision 220969)
+++ symtab.c    (Arbeitskopie)
@@ -1165,6 +1165,7 @@ symtab_node::make_decl_local (void)
   DECL_VISIBILITY_SPECIFIED (decl) = 0;
   DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
   TREE_PUBLIC (decl) = 0;
+  DECL_DLLIMPORT_P (decl) = 0;
   if (!DECL_RTL_SET_P (decl))
     return;

@@ -1534,7 +1535,6 @@ symtab_node::noninterposable_alias (symtab_node *n
          != flags_from_decl_or_type (fn->decl))
       || DECL_ATTRIBUTES (node->decl) != DECL_ATTRIBUTES (fn->decl))
     return false;
-
       *(symtab_node **)data = node;
       return true;
     }
@@ -1566,6 +1566,7 @@ symtab_node::noninterposable_alias (void)

   /* Otherwise create a new one.  */
   new_decl = copy_node (node->decl);
+  DECL_DLLIMPORT_P (new_decl) = 0;
   DECL_NAME (new_decl) = clone_function_name (node->decl, "localalias");
   if (TREE_CODE (new_decl) == FUNCTION_DECL)
     DECL_STRUCT_FUNCTION (new_decl) = NULL;

Re: [patch]: Fix PR target/64212

[Kai Tietz]

Applied at revision 22098 to trunk.  Jan approved patch on IRC.

Regards,
Kai