public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug optimization/15159] New: [3.4 regression] ICE in rtl_verify_flow_info_1
@ 2004-04-26 23:50 bangerth at dealii dot org
2004-04-26 23:54 ` [Bug optimization/15159] " bangerth at dealii dot org
` (12 more replies)
0 siblings, 13 replies; 14+ messages in thread
From: bangerth at dealii dot org @ 2004-04-26 23:50 UTC (permalink / raw)
To: gcc-bugs
The attached testcase compiles fine with gcc 3.3, but ICEs with
gcc 3.4 like so:
deal.II/lac> c++ -c -O2 block_sparse_matrix.ii
block_sparse_matrix.ii: In member function `void
BlockSparseMatrix<number>::reinit(const BlockSparsityPattern&) [with number =
double]':
block_sparse_matrix.ii:34301: error: in basic block 35:
block_sparse_matrix.ii:34301: error: flow control insn inside a basic block
(call_insn 746 672 751 35 (call_placeholder 711 673 0 0 (call_insn 713 712 714
(parallel [
(set (reg:SI 2 $2)
(call (mem:SI (reg:SI 321) [0 S4 A32])
(const_int 0 [0x0])))
(clobber (reg:SI 31 $31))
]) -1 (nil)
(nil)
(expr_list (use (reg:SI 28 $28))
(expr_list (use (reg:SI 4 $4))
(nil))))) -1 (nil)
(nil)
(nil))
block_sparse_matrix.ii:34301: internal compiler error: in
rtl_verify_flow_info_1, at cfgrtl.c:2053
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
Since this machine is just about too slow, I will not be able to
provide reduced code for a while. If someone has an interest in
beating me to it, please feel more than welcome!
W.
--
Summary: [3.4 regression] ICE in rtl_verify_flow_info_1
Product: gcc
Version: 3.4.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P2
Component: optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: bangerth at dealii dot org
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: mips-sgi-irix6.5
GCC host triplet: mips-sgi-irix6.5
GCC target triplet: mips-sgi-irix6.5
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15159
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug optimization/15159] [3.4 regression] ICE in rtl_verify_flow_info_1
2004-04-26 23:50 [Bug optimization/15159] New: [3.4 regression] ICE in rtl_verify_flow_info_1 bangerth at dealii dot org
@ 2004-04-26 23:54 ` bangerth at dealii dot org
2004-04-26 23:57 ` bangerth at dealii dot org
` (11 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: bangerth at dealii dot org @ 2004-04-26 23:54 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From bangerth at dealii dot org 2004-04-26 23:33 -------
Created an attachment (id=6166)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=6166&action=view)
preprocessed sources
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15159
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug optimization/15159] [3.4 regression] ICE in rtl_verify_flow_info_1
2004-04-26 23:50 [Bug optimization/15159] New: [3.4 regression] ICE in rtl_verify_flow_info_1 bangerth at dealii dot org
2004-04-26 23:54 ` [Bug optimization/15159] " bangerth at dealii dot org
@ 2004-04-26 23:57 ` bangerth at dealii dot org
2004-04-27 0:39 ` pinskia at gcc dot gnu dot org
` (10 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: bangerth at dealii dot org @ 2004-04-26 23:57 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From bangerth at dealii dot org 2004-04-26 23:50 -------
I should note that I could trigger this ICE on three different files
(two of them had the same kind of loop, the third one didn't; the
common theme was the access to a previously assigned reference),
so it doesn't seem to be a really rare thing.
Who is the author of rtl_verify_flow_info_1?
W.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15159
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug optimization/15159] [3.4 regression] ICE in rtl_verify_flow_info_1
2004-04-26 23:50 [Bug optimization/15159] New: [3.4 regression] ICE in rtl_verify_flow_info_1 bangerth at dealii dot org
2004-04-26 23:54 ` [Bug optimization/15159] " bangerth at dealii dot org
2004-04-26 23:57 ` bangerth at dealii dot org
@ 2004-04-27 0:39 ` pinskia at gcc dot gnu dot org
2004-04-27 0:41 ` bangerth at dealii dot org
` (9 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-04-27 0:39 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-04-26 23:56 -------
rtl_verify_flow_info_1 came about with this patch but it was split out from rtl_verify_flow_info so it most
likely not a bug in rtl_verify_flow_info_1 or rtl_verify_flow_info but a bug in the RTL optimizers, this is a
verifier which verifiers if the RTL is wrong.
Sun Jun 8 15:52:17 CEST 2003 Jan Hubicka <jh@suse.cz>
* i386.md (subsi_3_zext, sse2_nandv2di3): Fix predicates.
* i386.c (k8_avoid_jump_misspredicts): Fix debug output.
* cfg.c (verify_flow_info): Move IL independent checks from cfgrtl here.
(dump_bb): New based on old dump_bb in cfgrtl.c
(debug_bb, debug_bb_n): Move the functions from cfgrtl.c here.
* cfghooks.h (cfgh_verify_flow_info): Return status.
* cfglayout.c (cfg_layout_finalize): Verify CFG correctness.
* cfgrtl.c (debug_bb, debug_bb_n): Move to cfg.c
(dump_bb): Remove generic parts.
(rtl_verify_flow_info_1): Break out from rtl_verify_flow_info.
(rtl_verify_flow_info): Only check things dependeing on linearized RTL.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15159
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug optimization/15159] [3.4 regression] ICE in rtl_verify_flow_info_1
2004-04-26 23:50 [Bug optimization/15159] New: [3.4 regression] ICE in rtl_verify_flow_info_1 bangerth at dealii dot org
` (2 preceding siblings ...)
2004-04-27 0:39 ` pinskia at gcc dot gnu dot org
@ 2004-04-27 0:41 ` bangerth at dealii dot org
2004-04-27 14:54 ` bangerth at dealii dot org
` (8 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: bangerth at dealii dot org @ 2004-04-27 0:41 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From bangerth at dealii dot org 2004-04-27 00:23 -------
Jan, does this ICE trigger something with you?
W.
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |jh at suse dot cz
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15159
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug optimization/15159] [3.4 regression] ICE in rtl_verify_flow_info_1
2004-04-26 23:50 [Bug optimization/15159] New: [3.4 regression] ICE in rtl_verify_flow_info_1 bangerth at dealii dot org
` (3 preceding siblings ...)
2004-04-27 0:41 ` bangerth at dealii dot org
@ 2004-04-27 14:54 ` bangerth at dealii dot org
2004-04-27 15:13 ` bangerth at dealii dot org
` (7 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: bangerth at dealii dot org @ 2004-04-27 14:54 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From bangerth at dealii dot org 2004-04-27 14:27 -------
Here is a small testcase:
--------------------------
struct S {
S ();
void reinit ();
};
struct P {
P & operator= (S *);
S * operator -> () const;
};
class X {
void reinit ();
P p;
};
void X::reinit ()
{
p = new S();
p->reinit ();
}
-----------------------------
bangerth/tmp> /home/staff/bangerth/bin/sgi/gcc-3.4.0/bin/c++ -O2 -c x.cc
x.cc: In member function `void X::reinit()':
x.cc:20: error: in basic block 0:
x.cc:20: error: flow control insn inside a basic block
(call_insn 86 6 90 0 (call_placeholder 51 13 0 0 (call_insn 53 52 54 (parallel [
(set (reg:SI 2 $2)
(call (mem:SI (reg:SI 193) [0 S4 A32])
(const_int 0 [0x0])))
(clobber (reg:SI 31 $31))
]) -1 (nil)
(nil)
(expr_list (use (reg:SI 28 $28))
(expr_list (use (reg:SI 4 $4))
(nil))))) -1 (nil)
(nil)
(nil))
x.cc:20: internal compiler error: in rtl_verify_flow_info_1, at cfgrtl.c:2053
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
bangerth/tmp> /home/staff/bangerth/bin/sgi/gcc-3.4.0/bin/c++ -v
Reading specs from /home/staff/bangerth/bin/sgi/gcc-3.4.0/lib/gcc/mips-sgi-irix6.5/3.4.0/specs
Configured with: ../gcc-3.4.0/configure --prefix=/home/staff/bangerth/bin/sgi/gcc-3.4.0
--enable-languages=c,c++,f77 --enable-checking
Thread model: single
gcc version 3.4.0
W.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15159
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug optimization/15159] [3.4 regression] ICE in rtl_verify_flow_info_1
2004-04-26 23:50 [Bug optimization/15159] New: [3.4 regression] ICE in rtl_verify_flow_info_1 bangerth at dealii dot org
` (4 preceding siblings ...)
2004-04-27 14:54 ` bangerth at dealii dot org
@ 2004-04-27 15:13 ` bangerth at dealii dot org
2004-04-27 17:52 ` reichelt at gcc dot gnu dot org
` (6 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: bangerth at dealii dot org @ 2004-04-27 15:13 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From bangerth at dealii dot org 2004-04-27 14:33 -------
Uh, this goes even smaller:
----------------------
struct S {
S ();
void foo ();
};
struct P {
P (S *);
S s;
};
void bar () {
P p = new S();
p.s.foo ();
}
----------------------------
bangerth/tmp> /home/staff/bangerth/bin/sgi/gcc-3.4.0/bin/c++ -O2 -c x.cc
x.cc: In function `void bar()':
x.cc:14: error: in basic block 0:
x.cc:14: error: flow control insn inside a basic block
(call_insn 85 104 98 0 (call_placeholder 50 12 0 0 (call_insn 52 51 53 (parallel [
(set (reg:SI 2 $2)
(call (mem:SI (reg:SI 194) [0 S4 A32])
(const_int 0 [0x0])))
(clobber (reg:SI 31 $31))
]) -1 (nil)
(nil)
(expr_list (use (reg:SI 28 $28))
(expr_list (use (reg:SI 4 $4))
(nil))))) -1 (nil)
(nil)
(nil))
x.cc:14: internal compiler error: in rtl_verify_flow_info_1, at cfgrtl.c:2053
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
W.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15159
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug optimization/15159] [3.4 regression] ICE in rtl_verify_flow_info_1
2004-04-26 23:50 [Bug optimization/15159] New: [3.4 regression] ICE in rtl_verify_flow_info_1 bangerth at dealii dot org
` (5 preceding siblings ...)
2004-04-27 15:13 ` bangerth at dealii dot org
@ 2004-04-27 17:52 ` reichelt at gcc dot gnu dot org
2004-05-01 20:14 ` rsandifo at gcc dot gnu dot org
` (5 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: reichelt at gcc dot gnu dot org @ 2004-04-27 17:52 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From reichelt at gcc dot gnu dot org 2004-04-27 17:27 -------
Confirmed (example in comment #6).
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |reichelt at gcc dot gnu dot
| |org
Severity|normal |critical
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Known to fail| |3.4.0
Known to work| |3.3.3
Last reconfirmed|0000-00-00 00:00:00 |2004-04-27 17:27:29
date| |
Target Milestone|--- |3.4.1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15159
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug optimization/15159] [3.4 regression] ICE in rtl_verify_flow_info_1
2004-04-26 23:50 [Bug optimization/15159] New: [3.4 regression] ICE in rtl_verify_flow_info_1 bangerth at dealii dot org
` (6 preceding siblings ...)
2004-04-27 17:52 ` reichelt at gcc dot gnu dot org
@ 2004-05-01 20:14 ` rsandifo at gcc dot gnu dot org
2004-06-19 9:17 ` [Bug rtl-optimization/15159] " rsandifo at gcc dot gnu dot org
` (4 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: rsandifo at gcc dot gnu dot org @ 2004-05-01 20:14 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rsandifo at gcc dot gnu dot org 2004-05-01 20:14 -------
Been looking at this a little today. It seems to be specific to sibling
calls (there's no problem if you use -fno-optimize-sibling-calls) and
probably depends on how aggressively the backend tries to use them.
MIPS is very aggressive ;)
Taking the reduced example:
void bar () {
P p = new S();
p.s.foo ();
}
the first statement ends up in a call_placeholder. The call inside the
placeholder can throw, so it (correctly?) satisfies control_flow_insn_p.
It is initially placed in its own basic block.
However, reachable_handlers returns an empty list for call_placeholders,
so there are no EH edges from this block. The only edge is a fallthru
to the second block. This convinces try_optimize_cfg that the blocks
can be merged by merge_blocks_move().
I'm not sure when I'll next have time to look at this, but maybe the
above will be enough to trigger an Aha!
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |rsandifo at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15159
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug rtl-optimization/15159] [3.4 regression] ICE in rtl_verify_flow_info_1
2004-04-26 23:50 [Bug optimization/15159] New: [3.4 regression] ICE in rtl_verify_flow_info_1 bangerth at dealii dot org
` (7 preceding siblings ...)
2004-05-01 20:14 ` rsandifo at gcc dot gnu dot org
@ 2004-06-19 9:17 ` rsandifo at gcc dot gnu dot org
2004-06-20 11:00 ` rsandifo at gcc dot gnu dot org
` (3 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: rsandifo at gcc dot gnu dot org @ 2004-06-19 9:17 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rsandifo at gcc dot gnu dot org 2004-06-19 09:17 -------
Think I finally have a handle on this. Testing a patch now.
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |rsandifo at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15159
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug rtl-optimization/15159] [3.4 regression] ICE in rtl_verify_flow_info_1
2004-04-26 23:50 [Bug optimization/15159] New: [3.4 regression] ICE in rtl_verify_flow_info_1 bangerth at dealii dot org
` (8 preceding siblings ...)
2004-06-19 9:17 ` [Bug rtl-optimization/15159] " rsandifo at gcc dot gnu dot org
@ 2004-06-20 11:00 ` rsandifo at gcc dot gnu dot org
2004-06-21 6:14 ` mark at codesourcery dot com
` (2 subsequent siblings)
12 siblings, 0 replies; 14+ messages in thread
From: rsandifo at gcc dot gnu dot org @ 2004-06-20 11:00 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rsandifo at gcc dot gnu dot org 2004-06-20 11:00 -------
Patch posted here:
http://gcc.gnu.org/ml/gcc-patches/2004-06/msg01601.html
(Mark, this is a somewhat target-independent 3.4.0 ICE-on-valid regression.)
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |mmitchel at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15159
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug rtl-optimization/15159] [3.4 regression] ICE in rtl_verify_flow_info_1
2004-04-26 23:50 [Bug optimization/15159] New: [3.4 regression] ICE in rtl_verify_flow_info_1 bangerth at dealii dot org
` (9 preceding siblings ...)
2004-06-20 11:00 ` rsandifo at gcc dot gnu dot org
@ 2004-06-21 6:14 ` mark at codesourcery dot com
2004-06-21 6:30 ` cvs-commit at gcc dot gnu dot org
2004-06-21 6:34 ` rsandifo at gcc dot gnu dot org
12 siblings, 0 replies; 14+ messages in thread
From: mark at codesourcery dot com @ 2004-06-21 6:14 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From mark at codesourcery dot com 2004-06-21 06:14 -------
Subject: Re: [3.4 regression] ICE in rtl_verify_flow_info_1
rsandifo at gcc dot gnu dot org wrote:
> ------- Additional Comments From rsandifo at gcc dot gnu dot org 2004-06-20 11:00 -------
> Patch posted here:
>
> http://gcc.gnu.org/ml/gcc-patches/2004-06/msg01601.html
>
> (Mark, this is a somewhat target-independent 3.4.0 ICE-on-valid regression.)
This is OK for 3.4.1; please check in ASAP.
Thanks,
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15159
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug rtl-optimization/15159] [3.4 regression] ICE in rtl_verify_flow_info_1
2004-04-26 23:50 [Bug optimization/15159] New: [3.4 regression] ICE in rtl_verify_flow_info_1 bangerth at dealii dot org
` (10 preceding siblings ...)
2004-06-21 6:14 ` mark at codesourcery dot com
@ 2004-06-21 6:30 ` cvs-commit at gcc dot gnu dot org
2004-06-21 6:34 ` rsandifo at gcc dot gnu dot org
12 siblings, 0 replies; 14+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2004-06-21 6:30 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2004-06-21 06:30 -------
Subject: Bug 15159
CVSROOT: /cvs/gcc
Module name: gcc
Branch: gcc-3_4-branch
Changes by: rsandifo@gcc.gnu.org 2004-06-21 06:30:18
Modified files:
gcc : ChangeLog tree.c
gcc/testsuite : ChangeLog
Added files:
gcc/testsuite/g++.dg/opt: placeholder1.C
Log message:
PR rtl-optimization/15159
* tree.c (unsafe_for_reeval): Return 2 for TRY_CATCH_EXPRs.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=2.2326.2.515&r2=2.2326.2.516
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.342.2.3&r2=1.342.2.4
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.3389.2.211&r2=1.3389.2.212
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/opt/placeholder1.C.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=NONE&r2=1.1.2.1
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15159
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bug rtl-optimization/15159] [3.4 regression] ICE in rtl_verify_flow_info_1
2004-04-26 23:50 [Bug optimization/15159] New: [3.4 regression] ICE in rtl_verify_flow_info_1 bangerth at dealii dot org
` (11 preceding siblings ...)
2004-06-21 6:30 ` cvs-commit at gcc dot gnu dot org
@ 2004-06-21 6:34 ` rsandifo at gcc dot gnu dot org
12 siblings, 0 replies; 14+ messages in thread
From: rsandifo at gcc dot gnu dot org @ 2004-06-21 6:34 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rsandifo at gcc dot gnu dot org 2004-06-21 06:34 -------
Patch applied to 3.4 branch. Not a problem on mainline:
see gcc-patches link.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15159
^ permalink raw reply [flat|nested] 14+ messages in thread
end of thread, other threads:[~2004-06-21 6:34 UTC | newest]
Thread overview: 14+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2004-04-26 23:50 [Bug optimization/15159] New: [3.4 regression] ICE in rtl_verify_flow_info_1 bangerth at dealii dot org
2004-04-26 23:54 ` [Bug optimization/15159] " bangerth at dealii dot org
2004-04-26 23:57 ` bangerth at dealii dot org
2004-04-27 0:39 ` pinskia at gcc dot gnu dot org
2004-04-27 0:41 ` bangerth at dealii dot org
2004-04-27 14:54 ` bangerth at dealii dot org
2004-04-27 15:13 ` bangerth at dealii dot org
2004-04-27 17:52 ` reichelt at gcc dot gnu dot org
2004-05-01 20:14 ` rsandifo at gcc dot gnu dot org
2004-06-19 9:17 ` [Bug rtl-optimization/15159] " rsandifo at gcc dot gnu dot org
2004-06-20 11:00 ` rsandifo at gcc dot gnu dot org
2004-06-21 6:14 ` mark at codesourcery dot com
2004-06-21 6:30 ` cvs-commit at gcc dot gnu dot org
2004-06-21 6:34 ` rsandifo at gcc dot gnu dot org
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).