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* [Bug tree-optimization/66372] [6 Regression] ICE on valid code at -O3 on x86_64-linux-gnu
[not found] <bug-66372-4@http.gcc.gnu.org/bugzilla/>
@ 2015-06-02 8:53 ` rguenth at gcc dot gnu.org
2015-07-10 13:50 ` mpolacek at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 6+ messages in thread
From: rguenth at gcc dot gnu.org @ 2015-06-02 8:53 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66372
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2015-06-02
Known to work| |5.1.0
Target Milestone|--- |6.0
Summary|ICE on valid code at -O3 on |[6 Regression] ICE on valid
|x86_64-linux-gnu |code at -O3 on
| |x86_64-linux-gnu
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.
(gdb) p path->last ()->e->src->loop_father
Cannot access memory at address 0xa5a5a5a5a5a5a5bd
looks like e->src was freed.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/66372] [6 Regression] ICE on valid code at -O3 on x86_64-linux-gnu
[not found] <bug-66372-4@http.gcc.gnu.org/bugzilla/>
2015-06-02 8:53 ` [Bug tree-optimization/66372] [6 Regression] ICE on valid code at -O3 on x86_64-linux-gnu rguenth at gcc dot gnu.org
@ 2015-07-10 13:50 ` mpolacek at gcc dot gnu.org
2015-07-20 14:33 ` jgreenhalgh at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 6+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2015-07-10 13:50 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66372
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mpolacek at gcc dot gnu.org
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r223448.
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/66372] [6 Regression] ICE on valid code at -O3 on x86_64-linux-gnu
[not found] <bug-66372-4@http.gcc.gnu.org/bugzilla/>
2015-06-02 8:53 ` [Bug tree-optimization/66372] [6 Regression] ICE on valid code at -O3 on x86_64-linux-gnu rguenth at gcc dot gnu.org
2015-07-10 13:50 ` mpolacek at gcc dot gnu.org
@ 2015-07-20 14:33 ` jgreenhalgh at gcc dot gnu.org
2015-07-20 15:02 ` jgreenhalgh at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 6+ messages in thread
From: jgreenhalgh at gcc dot gnu.org @ 2015-07-20 14:33 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66372
James Greenhalgh <jgreenhalgh at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jgreenhalgh at gcc dot gnu.org
--- Comment #3 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
Possibly related to this report on gcc-patches:
https://gcc.gnu.org/ml/gcc-patches/2015-07/msg01649.html
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/66372] [6 Regression] ICE on valid code at -O3 on x86_64-linux-gnu
[not found] <bug-66372-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2015-07-20 14:33 ` jgreenhalgh at gcc dot gnu.org
@ 2015-07-20 15:02 ` jgreenhalgh at gcc dot gnu.org
2015-07-21 16:35 ` mpolacek at gcc dot gnu.org
2015-08-25 13:46 ` mpolacek at gcc dot gnu.org
5 siblings, 0 replies; 6+ messages in thread
From: jgreenhalgh at gcc dot gnu.org @ 2015-07-20 15:02 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66372
--- Comment #4 from James Greenhalgh <jgreenhalgh at gcc dot gnu.org> ---
I think this is the same issue as I spotted in the larger testcase.
Looking at the cancelled jumps:
trunk/foo.c.096t.dom1: Cancelling jump thread: (6, 8) incoming edge; (8,
13) joiner; (13, 9) normal;
trunk/foo.c.096t.dom1: Cancelling jump thread: (7, 9) incoming edge; (9,
13) joiner; (13, 10) normal;
With r223448 reverted:
reverted/small.c.096t.dom1: Cancelling jump thread: (6, 8) incoming edge;
(8, 13) joiner; (13, 9) normal;
reverted/small.c.096t.dom1: Cancelling jump thread: (7, 9) incoming edge;
(9, 13) joiner; (13, 10) normal;
reverted/small.c.096t.dom1: Cancelling jump thread: (2, 3) incoming edge;
(3, 4) joiner; (4, 5) normal;
If we fail to cancel 2 --> 3 to 5, we will probably end up in trouble given the
other blocks we've threaded through:
trunk/small.c.096t.dom1: Threaded jump 6 --> 10 to 16
trunk/small.c.096t.dom1: Threaded jump 7 --> 10 to 16
trunk/small.c.096t.dom1: Threaded jump 15 --> 13 to 17
trunk/small.c.096t.dom1: Threaded jump 8 --> 13 to 17
trunk/small.c.096t.dom1: Threaded jump 3 --> 4 to 15
trunk/small.c.096t.dom1: Threaded jump 14 --> 13 to 16
trunk/small.c.096t.dom1: Threaded jump 9 --> 13 to 16
And taking a look at the path we're processing just before the ICE, it does
start (2, 3).
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/66372] [6 Regression] ICE on valid code at -O3 on x86_64-linux-gnu
[not found] <bug-66372-4@http.gcc.gnu.org/bugzilla/>
` (3 preceding siblings ...)
2015-07-20 15:02 ` jgreenhalgh at gcc dot gnu.org
@ 2015-07-21 16:35 ` mpolacek at gcc dot gnu.org
2015-08-25 13:46 ` mpolacek at gcc dot gnu.org
5 siblings, 0 replies; 6+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2015-07-21 16:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66372
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |antoine.balestrat at gmail dot com
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
*** Bug 66958 has been marked as a duplicate of this bug. ***
^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/66372] [6 Regression] ICE on valid code at -O3 on x86_64-linux-gnu
[not found] <bug-66372-4@http.gcc.gnu.org/bugzilla/>
` (4 preceding siblings ...)
2015-07-21 16:35 ` mpolacek at gcc dot gnu.org
@ 2015-08-25 13:46 ` mpolacek at gcc dot gnu.org
5 siblings, 0 replies; 6+ messages in thread
From: mpolacek at gcc dot gnu.org @ 2015-08-25 13:46 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66372
Marek Polacek <mpolacek at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
This seems to be fixed now.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2015-08-25 13:46 UTC | newest]
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[not found] <bug-66372-4@http.gcc.gnu.org/bugzilla/>
2015-06-02 8:53 ` [Bug tree-optimization/66372] [6 Regression] ICE on valid code at -O3 on x86_64-linux-gnu rguenth at gcc dot gnu.org
2015-07-10 13:50 ` mpolacek at gcc dot gnu.org
2015-07-20 14:33 ` jgreenhalgh at gcc dot gnu.org
2015-07-20 15:02 ` jgreenhalgh at gcc dot gnu.org
2015-07-21 16:35 ` mpolacek at gcc dot gnu.org
2015-08-25 13:46 ` mpolacek at gcc dot gnu.org
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