The previous patch adjusting free_lang_data_in_type missed to adjust find_decls_types_r. We might not be visiting all types we use in the end due to this.
LTO bootstrapped and tested on x86_64-unknown-linux-gnu, applying to trunk and branch. Richard. 2012-07-04 Richard Guenther <rguent...@suse.de> * tree.c (find_decls_types_r): Handle TYPE_CONTEXT the same as in free_lang_data_in_type. Index: gcc/tree.c =================================================================== --- gcc/tree.c (revision 189248) +++ gcc/tree.c (working copy) @@ -4910,7 +4910,15 @@ find_decls_types_r (tree *tp, int *ws, v fld_worklist_push (TYPE_MAIN_VARIANT (t), fld); /* Do not walk TYPE_NEXT_VARIANT. We do not stream it and thus do not and want not to reach unused variants this way. */ - fld_worklist_push (TYPE_CONTEXT (t), fld); + if (TYPE_CONTEXT (t)) + { + tree ctx = TYPE_CONTEXT (t); + /* We adjust BLOCK TYPE_CONTEXTs to the innermost non-BLOCK one. + So push that instead. */ + while (ctx && TREE_CODE (ctx) == BLOCK) + ctx = BLOCK_SUPERCONTEXT (ctx); + fld_worklist_push (ctx, fld); + } /* Do not walk TYPE_CANONICAL. We do not stream it and thus do not and want not to reach unused types this way. */