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* [Bug c++/40445] New: g++ void f() { __builtin_unreachable(); }
@ 2009-06-15 13:10 wouter dot vermaelen at scarlet dot be
2009-06-15 13:59 ` [Bug c++/40445] [4.5 Regression] " rguenth at gcc dot gnu dot org
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: wouter dot vermaelen at scarlet dot be @ 2009-06-15 13:10 UTC (permalink / raw)
To: gcc-bugs
Compiling the single line program
void f() { __builtin_unreachable(); }
works fine with gcc, but triggers an ICE when compiled with g++
unreachable.c:1:37: internal compiler error: in remove_insn, at emit-rtl.c:3796
I'm using SVN revision 148487.
--
Summary: g++ void f() { __builtin_unreachable(); }
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: wouter dot vermaelen at scarlet dot be
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40445
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/40445] [4.5 Regression] g++ void f() { __builtin_unreachable(); }
2009-06-15 13:10 [Bug c++/40445] New: g++ void f() { __builtin_unreachable(); } wouter dot vermaelen at scarlet dot be
@ 2009-06-15 13:59 ` rguenth at gcc dot gnu dot org
2009-06-15 14:59 ` [Bug c++/40445] " hjl dot tools at gmail dot com
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2009-06-15 13:59 UTC (permalink / raw)
To: gcc-bugs
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|g++ void f() { |[4.5 Regression] g++ void
|__builtin_unreachable(); } |f() {
| |__builtin_unreachable(); }
Target Milestone|--- |4.5.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40445
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/40445] g++ void f() { __builtin_unreachable(); }
2009-06-15 13:10 [Bug c++/40445] New: g++ void f() { __builtin_unreachable(); } wouter dot vermaelen at scarlet dot be
2009-06-15 13:59 ` [Bug c++/40445] [4.5 Regression] " rguenth at gcc dot gnu dot org
@ 2009-06-15 14:59 ` hjl dot tools at gmail dot com
2009-06-15 15:00 ` pinskia at gcc dot gnu dot org
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: hjl dot tools at gmail dot com @ 2009-06-15 14:59 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from hjl dot tools at gmail dot com 2009-06-15 14:59 -------
Why is this a regression? Do we support _builtin_unreachable() in 4.4?
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.5 Regression] g++ void |g++ void f() {
|f() { |__builtin_unreachable(); }
|__builtin_unreachable(); } |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40445
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/40445] g++ void f() { __builtin_unreachable(); }
2009-06-15 13:10 [Bug c++/40445] New: g++ void f() { __builtin_unreachable(); } wouter dot vermaelen at scarlet dot be
2009-06-15 13:59 ` [Bug c++/40445] [4.5 Regression] " rguenth at gcc dot gnu dot org
2009-06-15 14:59 ` [Bug c++/40445] " hjl dot tools at gmail dot com
@ 2009-06-15 15:00 ` pinskia at gcc dot gnu dot org
2009-06-17 0:24 ` daney at gcc dot gnu dot org
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2009-06-15 15:00 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from pinskia at gcc dot gnu dot org 2009-06-15 15:00 -------
(In reply to comment #1)
> Why is this a regression? Do we support _builtin_unreachable() in 4.4?
Well it is a regression as it compiled before and did not do what the user
expected though.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pinskia at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40445
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/40445] g++ void f() { __builtin_unreachable(); }
2009-06-15 13:10 [Bug c++/40445] New: g++ void f() { __builtin_unreachable(); } wouter dot vermaelen at scarlet dot be
` (2 preceding siblings ...)
2009-06-15 15:00 ` pinskia at gcc dot gnu dot org
@ 2009-06-17 0:24 ` daney at gcc dot gnu dot org
2009-06-21 14:18 ` daney at gcc dot gnu dot org
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: daney at gcc dot gnu dot org @ 2009-06-17 0:24 UTC (permalink / raw)
To: gcc-bugs
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------- Comment #3 from daney at gcc dot gnu dot org 2009-06-17 00:23 -------
At r 148555 on x86_64-pc-linux-gnu I can confirm:
[daney@dd_xps junk]$ /home/daney/gccsvn/native-clean/gcc/g++
-B/home/daney/gccsvn/native-clean/gcc/ -fomit-frame-pointer -m32 -S dd1.cc
dd1.cc: In function void g(int):
dd1.cc:4:1: internal compiler error: in remove_insn, at emit-rtl.c:3796
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[daney@dd_xps junk]$ cat dd1.cc
void g (int c)
{
__builtin_unreachable ();
}
[daney@dd_xps junk]$ /home/daney/gccsvn/native-clean/gcc/g++
-B/home/daney/gccsvn/native-clean/gcc/ -fomit-frame-pointer -m32 -S dd1.cc
dd1.cc: In function void g(int):
dd1.cc:4:1: internal compiler error: in remove_insn, at emit-rtl.c:3796
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
I will take a look.
--
daney at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |daney at gcc dot gnu dot org
|dot org |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40445
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/40445] g++ void f() { __builtin_unreachable(); }
2009-06-15 13:10 [Bug c++/40445] New: g++ void f() { __builtin_unreachable(); } wouter dot vermaelen at scarlet dot be
` (3 preceding siblings ...)
2009-06-17 0:24 ` daney at gcc dot gnu dot org
@ 2009-06-21 14:18 ` daney at gcc dot gnu dot org
2009-07-10 22:56 ` [Bug rtl-optimization/40445] " daney at gcc dot gnu dot org
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: daney at gcc dot gnu dot org @ 2009-06-21 14:18 UTC (permalink / raw)
To: gcc-bugs
--
daney at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2009-06-21 14:18:30
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40445
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug rtl-optimization/40445] g++ void f() { __builtin_unreachable(); }
2009-06-15 13:10 [Bug c++/40445] New: g++ void f() { __builtin_unreachable(); } wouter dot vermaelen at scarlet dot be
` (4 preceding siblings ...)
2009-06-21 14:18 ` daney at gcc dot gnu dot org
@ 2009-07-10 22:56 ` daney at gcc dot gnu dot org
2009-07-25 20:25 ` daney at gcc dot gnu dot org
2009-07-26 5:05 ` daney at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: daney at gcc dot gnu dot org @ 2009-07-10 22:56 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from daney at gcc dot gnu dot org 2009-07-10 22:55 -------
This is the proposed patch for this bug:
http://gcc.gnu.org/ml/gcc-patches/2009-06/msg01978.html
--
daney at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |patch
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40445
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug rtl-optimization/40445] g++ void f() { __builtin_unreachable(); }
2009-06-15 13:10 [Bug c++/40445] New: g++ void f() { __builtin_unreachable(); } wouter dot vermaelen at scarlet dot be
` (5 preceding siblings ...)
2009-07-10 22:56 ` [Bug rtl-optimization/40445] " daney at gcc dot gnu dot org
@ 2009-07-25 20:25 ` daney at gcc dot gnu dot org
2009-07-26 5:05 ` daney at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: daney at gcc dot gnu dot org @ 2009-07-25 20:25 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from daney at gcc dot gnu dot org 2009-07-25 20:25 -------
Subject: Bug 40445
Author: daney
Date: Sat Jul 25 20:25:18 2009
New Revision: 150090
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=150090
Log:
2009-07-25 David Daney <ddaney@caviumnetworks.com>
PR rtl-optimization/40445
* emit-rtl.c (next_nonnote_insn_bb): New function.
* rtl.h (next_nonnote_insn_bb): Declare new function.
* cfgcleanup.c (try_optimize_cfg): Don't remove an empty block
with no successors that is the successor of the ENTRY_BLOCK.
Continue from the top after removing an empty fallthrough block.
* cfgrtl.c (get_last_bb_insn): Call next_nonnote_insn_bb instead
of next_nonnote_insn.
2009-07-25 David Daney <ddaney@caviumnetworks.com>
PR rtl-optimization/40445
* g++.dg/other/builtin-unreachable-1.C: New testcase.
Added:
trunk/gcc/testsuite/g++.dg/other/builtin-unreachable-1.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cfgcleanup.c
trunk/gcc/cfgrtl.c
trunk/gcc/emit-rtl.c
trunk/gcc/rtl.h
trunk/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40445
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug rtl-optimization/40445] g++ void f() { __builtin_unreachable(); }
2009-06-15 13:10 [Bug c++/40445] New: g++ void f() { __builtin_unreachable(); } wouter dot vermaelen at scarlet dot be
` (6 preceding siblings ...)
2009-07-25 20:25 ` daney at gcc dot gnu dot org
@ 2009-07-26 5:05 ` daney at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: daney at gcc dot gnu dot org @ 2009-07-26 5:05 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from daney at gcc dot gnu dot org 2009-07-26 05:05 -------
Should be fixed by the patch.
--
daney at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40445
^ permalink raw reply [flat|nested] 9+ messages in thread
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2009-06-15 13:10 [Bug c++/40445] New: g++ void f() { __builtin_unreachable(); } wouter dot vermaelen at scarlet dot be
2009-06-15 13:59 ` [Bug c++/40445] [4.5 Regression] " rguenth at gcc dot gnu dot org
2009-06-15 14:59 ` [Bug c++/40445] " hjl dot tools at gmail dot com
2009-06-15 15:00 ` pinskia at gcc dot gnu dot org
2009-06-17 0:24 ` daney at gcc dot gnu dot org
2009-06-21 14:18 ` daney at gcc dot gnu dot org
2009-07-10 22:56 ` [Bug rtl-optimization/40445] " daney at gcc dot gnu dot org
2009-07-25 20:25 ` daney at gcc dot gnu dot org
2009-07-26 5:05 ` daney at gcc dot gnu dot org
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