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* [Bug tree-optimization/64807] New: [5 Regression] Wrong-code because of wide-int division
@ 2015-01-26 18:31 jakub at gcc dot gnu.org
2015-01-26 18:34 ` [Bug tree-optimization/64807] " jakub at gcc dot gnu.org
` (6 more replies)
0 siblings, 7 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2015-01-26 18:31 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64807
Bug ID: 64807
Summary: [5 Regression] Wrong-code because of wide-int division
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
CC: emsr at gcc dot gnu.org, jakub at gcc dot gnu.org,
nheghathivhistha at gmail dot com, segher at gcc dot gnu.org,
trippels at gcc dot gnu.org
Depends on: 63504, 63988
/* { dg-do run { target int128 } } */
/* { dg-options "-O2" } */
__uint128_t
foo (void)
{
__uint128_t a = -1;
__uint128_t b = -1;
return a / b;
}
int
main ()
{
if (foo () != 1)
__builtin_abort ();
return 0;
}
is miscompiled starting with wide-int merge r210113.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/64807] [5 Regression] Wrong-code because of wide-int division
2015-01-26 18:31 [Bug tree-optimization/64807] New: [5 Regression] Wrong-code because of wide-int division jakub at gcc dot gnu.org
@ 2015-01-26 18:34 ` jakub at gcc dot gnu.org
2015-01-27 0:29 ` zadeck at naturalbridge dot com
` (5 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2015-01-26 18:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64807
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2015-01-26
Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 34582
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34582&action=edit
gcc5-pr64807.patch
Untested fix.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/64807] [5 Regression] Wrong-code because of wide-int division
2015-01-26 18:31 [Bug tree-optimization/64807] New: [5 Regression] Wrong-code because of wide-int division jakub at gcc dot gnu.org
2015-01-26 18:34 ` [Bug tree-optimization/64807] " jakub at gcc dot gnu.org
@ 2015-01-27 0:29 ` zadeck at naturalbridge dot com
2015-01-27 8:27 ` jakub at gcc dot gnu.org
` (4 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: zadeck at naturalbridge dot com @ 2015-01-27 0:29 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64807
Kenneth Zadeck <zadeck at naturalbridge dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |zadeck at naturalbridge dot com
--- Comment #2 from Kenneth Zadeck <zadeck at naturalbridge dot com> ---
(In reply to Jakub Jelinek from comment #1)
> Created attachment 34582 [details]
> gcc5-pr64807.patch
>
> Untested fix.
This looks ok to me.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/64807] [5 Regression] Wrong-code because of wide-int division
2015-01-26 18:31 [Bug tree-optimization/64807] New: [5 Regression] Wrong-code because of wide-int division jakub at gcc dot gnu.org
2015-01-26 18:34 ` [Bug tree-optimization/64807] " jakub at gcc dot gnu.org
2015-01-27 0:29 ` zadeck at naturalbridge dot com
@ 2015-01-27 8:27 ` jakub at gcc dot gnu.org
2015-01-27 8:48 ` jakub at gcc dot gnu.org
` (3 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2015-01-27 8:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64807
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Jan 27 08:26:13 2015
New Revision: 220153
URL: https://gcc.gnu.org/viewcvs?rev=220153&root=gcc&view=rev
Log:
PR tree-optimization/64807
* wide-int.cc (wi::divmod_internal): Clear
b_dividend[dividend_blocks_needed].
* gcc.dg/pr64807.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr64807.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/wide-int.cc
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/64807] [5 Regression] Wrong-code because of wide-int division
2015-01-26 18:31 [Bug tree-optimization/64807] New: [5 Regression] Wrong-code because of wide-int division jakub at gcc dot gnu.org
` (2 preceding siblings ...)
2015-01-27 8:27 ` jakub at gcc dot gnu.org
@ 2015-01-27 8:48 ` jakub at gcc dot gnu.org
2015-01-28 18:26 ` LpSolit at netscape dot net
` (2 subsequent siblings)
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2015-01-27 8:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64807
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |5.0
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/64807] [5 Regression] Wrong-code because of wide-int division
2015-01-26 18:31 [Bug tree-optimization/64807] New: [5 Regression] Wrong-code because of wide-int division jakub at gcc dot gnu.org
` (3 preceding siblings ...)
2015-01-27 8:48 ` jakub at gcc dot gnu.org
@ 2015-01-28 18:26 ` LpSolit at netscape dot net
2015-02-03 9:40 ` jakub at gcc dot gnu.org
2015-03-09 20:49 ` trippels at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: LpSolit at netscape dot net @ 2015-01-28 18:26 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64807
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |5.0
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/64807] [5 Regression] Wrong-code because of wide-int division
2015-01-26 18:31 [Bug tree-optimization/64807] New: [5 Regression] Wrong-code because of wide-int division jakub at gcc dot gnu.org
` (4 preceding siblings ...)
2015-01-28 18:26 ` LpSolit at netscape dot net
@ 2015-02-03 9:40 ` jakub at gcc dot gnu.org
2015-03-09 20:49 ` trippels at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: jakub at gcc dot gnu.org @ 2015-02-03 9:40 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64807
Bug 64807 depends on bug 63504, which changed state.
Bug 63504 Summary: [5 Regression] Issues found by --enable-checking=valgrind
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63504
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
^ permalink raw reply [flat|nested] 8+ messages in thread
* [Bug tree-optimization/64807] [5 Regression] Wrong-code because of wide-int division
2015-01-26 18:31 [Bug tree-optimization/64807] New: [5 Regression] Wrong-code because of wide-int division jakub at gcc dot gnu.org
` (5 preceding siblings ...)
2015-02-03 9:40 ` jakub at gcc dot gnu.org
@ 2015-03-09 20:49 ` trippels at gcc dot gnu.org
6 siblings, 0 replies; 8+ messages in thread
From: trippels at gcc dot gnu.org @ 2015-03-09 20:49 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64807
Bug 64807 depends on bug 63988, which changed state.
Bug 63988 Summary: heap-buffer-overflow in combine.c on ppc64
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63988
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2015-03-09 20:49 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
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2015-01-26 18:31 [Bug tree-optimization/64807] New: [5 Regression] Wrong-code because of wide-int division jakub at gcc dot gnu.org
2015-01-26 18:34 ` [Bug tree-optimization/64807] " jakub at gcc dot gnu.org
2015-01-27 0:29 ` zadeck at naturalbridge dot com
2015-01-27 8:27 ` jakub at gcc dot gnu.org
2015-01-27 8:48 ` jakub at gcc dot gnu.org
2015-01-28 18:26 ` LpSolit at netscape dot net
2015-02-03 9:40 ` jakub at gcc dot gnu.org
2015-03-09 20:49 ` trippels at gcc dot gnu.org
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