public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
* [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) -- links below jump to the message on this page -- 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
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).