------- Comment #3 from jakub at gcc dot gnu dot org 2008-07-15 15:09 -------
Shorter testcase:
// { dg-do compile }
// { dg-options "-O2 -fprofile-arcs" }
struct A { A (); ~A (); };
A a[2];
What seems to be going on is that:
#0 create_temporary_var (type=0x7ffff3252780) at ../../gcc/cp/init.c:2613
#1 0x00000000005fd921 in get_temp_regvar (type=0x7ffff3252780,
init=0x7ffff324d500) at ../../gcc/cp/init.c:2635
#2 0x00000000005fdfad in build_vec_init (base=0x7ffff324d500,
maxindex=0x7ffff325c180, init=0x0, explicit_default_init_p=0 '\0',
from_array=0, complain=tf_warning_or_error) at ../../gcc/cp/init.c:2759
#3 0x00000000005f71be in build_aggr_init (exp=0x7ffff3209e60, init=0x0,
flags=0, complain=tf_warning_or_error) at ../../gcc/cp/init.c:1279
#4 0x000000000044b5de in build_aggr_init_full_exprs (decl=0x7ffff3209e60,
init=0x0, flags=0) at ../../gcc/cp/decl.c:4978
#5 0x000000000044c648 in check_initializer (decl=0x7ffff3209e60, init=0x0,
flags=0, cleanup=0x7fffffffde00) at ../../gcc/cp/decl.c:5104
#6 0x000000000044fc53 in cp_finish_decl (decl=0x7ffff3209e60, init=0x0,
init_const_expr_p=0 '\0', asmspec_tree=0x0, flags=0) at
../../gcc/cp/decl.c:5579
creates a VAR_DECL while current_function_decl == NULL. Later on
one_static_initialization_or_destruction puts all its uses (and DECL_EXPR for
it) into the artificial __static_initialization_or_destruction, but from what I
can see nothing actually fixes up DECL_CONTEXT of the variable to the function
it has been put into. If I manually set DECL_CONTEXT of these variables
in one_static_initialization_or_destruction, it compiles just fine.
If not and the vars make it through to the expander, they have DECL_NAME () ==
NULL and that leads to infinite recursion during mangling.
I wonder where is the best place to fix the contexts up though.
Either one_static_initialization_or_destruction could walk_tree init,
look for DECL_EXPRs with artificial VAR_DECLs with NULL DECL_CONTEXT, or
say cp-gimplify.c could do that.
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36767
