Hi, the testcase bellow manages to corrupt IPA-REF reference lists. The problem is that C++ FE creates new symtab node while another is in construction via DECL_ASSEMBLER_NAME hook.
Bootstrapped/regtested/comitted x86_64-linux. Honza Index: ChangeLog =================================================================== --- ChangeLog (revision 187797) +++ ChangeLog (working copy) @@ -1,3 +1,8 @@ +2012-05-22 Jan Hubicka <j...@suse.cz> + + PR middle-end/53161 + * symtab.c (symtab_register_node): Fix ordering issue. + 2012-05-22 Steven Drake <s...@netbsd.org> * gcc.c (do_spec_1): Add %M spec token to output multilib_os_dir. Index: testsuite/ChangeLog =================================================================== --- testsuite/ChangeLog (revision 187797) +++ testsuite/ChangeLog (working copy) @@ -1,3 +1,8 @@ +2012-05-22 Jan Hubicka <j...@suse.cz> + + PR middle-end/53161 + * g++.dg/torture/pr53161.C: New testcase. + 2012-05-22 Tobias Burnus <bur...@net-b.de> PR fortran/53389 Index: testsuite/g++.dg/torture/pr53161.C =================================================================== --- testsuite/g++.dg/torture/pr53161.C (revision 0) +++ testsuite/g++.dg/torture/pr53161.C (revision 0) @@ -0,0 +1,22 @@ +/* { dg-options "-std=c++11" } */ +void gg(); +static __typeof(gg) __gthrw_gg __attribute__((__weakref__("gg"))); + +template<typename R,typename... A> +struct data { + template<typename Y,typename X> + data(Y& y,R(X::*f)(A...)); +}; + +template<typename Y,typename X,typename R,typename... A> +data<R,A...> make_data(Y& y,R(X::*f)(A...)) { + return data<R,A...>(y,f); +} + +void global(data<void>); + +struct test { + void bar() {} + void doit() { global(make_data(*this,&test::bar)); } +}; + Index: symtab.c =================================================================== --- symtab.c (revision 187695) +++ symtab.c (working copy) @@ -177,11 +177,13 @@ symtab_register_node (symtab_node node) if (*slot == NULL) *slot = node; - insert_to_assembler_name_hash (node); + ipa_empty_ref_list (&node->symbol.ref_list); node->symbol.order = symtab_order++; - ipa_empty_ref_list (&node->symbol.ref_list); + /* Be sure to do this last; C++ FE might create new nodes via + DECL_ASSEMBLER_NAME langhook! */ + insert_to_assembler_name_hash (node); } /* Make NODE to be the one symtab hash is pointing to. Used when reshaping tree