https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89075
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-checking, lto
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-01-28
CC| |hubicka at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
Component|lto |middle-end
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
Looks like the pointer type was not properly shared since it looks equal
otherwise. Both are built via
#6 0x0000000001596d76 in build_qualified_type (
type=<pointer_type 0x7ffff69c6b28 a>, type_quals=0)
at /space/rguenther/src/svn/trunk2/gcc/tree.c:6445
#7 0x0000000001592e9b in free_lang_data_in_type (
type=<function_type 0x7ffff69c65e8 c>, fld=0x7fffffffda60)
at /space/rguenther/src/svn/trunk2/gcc/tree.c:5462
#8 0x0000000001595f53 in free_lang_data_in_cgraph (fld=0x7fffffffda60)
at /space/rguenther/src/svn/trunk2/gcc/tree.c:6179
#6 0x0000000001596d76 in build_qualified_type (
type=<pointer_type 0x7ffff69c6b28 a>, type_quals=0)
at /space/rguenther/src/svn/trunk2/gcc/tree.c:6445
#7 0x0000000001592e9b in free_lang_data_in_type (
type=<function_type 0x7ffff69c63f0 b>, fld=0x7fffffffda60)
at /space/rguenther/src/svn/trunk2/gcc/tree.c:5462
#8 0x0000000001595f53 in free_lang_data_in_cgraph (fld=0x7fffffffda60)
at /space/rguenther/src/svn/trunk2/gcc/tree.c:6179
but get_qualified_type doesn't find the duplicate becase the type
we're creating the qualified variant off has TYPE_NAME still as TYPE_DECL
while the one on the variant list is fld-ed already with an IDENTIFIER_NODE
because we do
#4 0x0000000001592e9b in free_lang_data_in_type (
type=<function_type 0x7ffff69c63f0 b>, fld=0x7fffffffda60)
at /space/rguenther/src/svn/trunk2/gcc/tree.c:5462
(gdb) l
5457 if (TYPE_READONLY (arg_type) || TYPE_VOLATILE (arg_type))
5458 {
5459 int quals = TYPE_QUALS (arg_type)
5460 & ~TYPE_QUAL_CONST
5461 & ~TYPE_QUAL_VOLATILE;
5462 TREE_VALUE (p) = build_qualified_type (arg_type, quals);
5463 free_lang_data_in_type (TREE_VALUE (p), fld);
but arg_type itself is only fld'ed later.
Which means we need to free-lang-data in SCCs?
