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* [Bug rtl-optimization/52490] New: RTL DCE removes trapping const libcalls
@ 2012-03-05 13:16 rguenth at gcc dot gnu.org
2023-06-02 2:46 ` [Bug rtl-optimization/52490] " pinskia at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-03-05 13:16 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52490
Bug #: 52490
Summary: RTL DCE removes trapping const libcalls
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Keywords: wrong-code
Severity: normal
Priority: P3
Component: rtl-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: rguenth@gcc.gnu.org
The testcase from PR47086
void
foo ()
{
int n = 0;
while (1)
{
int i[n % 1];
n++;
}
}
is miscompiled with -O -ftrapv -fnon-call-exceptions -fexceptions
by RTL DCE which removes the call to addvdi3.
^ permalink raw reply [flat|nested] 5+ messages in thread* [Bug rtl-optimization/52490] RTL DCE removes trapping const libcalls 2012-03-05 13:16 [Bug rtl-optimization/52490] New: RTL DCE removes trapping const libcalls rguenth at gcc dot gnu.org @ 2023-06-02 2:46 ` pinskia at gcc dot gnu.org 2023-06-02 2:53 ` pinskia at gcc dot gnu.org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu.org @ 2023-06-02 2:46 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52490 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Starting in GCC 12, the addition is removed at the gimple level. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/52490] RTL DCE removes trapping const libcalls 2012-03-05 13:16 [Bug rtl-optimization/52490] New: RTL DCE removes trapping const libcalls rguenth at gcc dot gnu.org 2023-06-02 2:46 ` [Bug rtl-optimization/52490] " pinskia at gcc dot gnu.org @ 2023-06-02 2:53 ` pinskia at gcc dot gnu.org 2023-06-02 3:06 ` pinskia at gcc dot gnu.org 2023-06-02 3:14 ` pinskia at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu.org @ 2023-06-02 2:53 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52490 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Known to fail| |6.4.0, 7.4.0, 8.1.0 Known to work| |7.5.0, 8.2.0 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- You need also -fno-delete-dead-exceptions not to remove them in newer versions for the gimple level. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/52490] RTL DCE removes trapping const libcalls 2012-03-05 13:16 [Bug rtl-optimization/52490] New: RTL DCE removes trapping const libcalls rguenth at gcc dot gnu.org 2023-06-02 2:46 ` [Bug rtl-optimization/52490] " pinskia at gcc dot gnu.org 2023-06-02 2:53 ` pinskia at gcc dot gnu.org @ 2023-06-02 3:06 ` pinskia at gcc dot gnu.org 2023-06-02 3:14 ` pinskia at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu.org @ 2023-06-02 3:06 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52490 --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Fixed for GCC 7.5.0, GCC 8.3.0 and GCC 9+ by the patch which fixed PR 89188. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug rtl-optimization/52490] RTL DCE removes trapping const libcalls 2012-03-05 13:16 [Bug rtl-optimization/52490] New: RTL DCE removes trapping const libcalls rguenth at gcc dot gnu.org ` (2 preceding siblings ...) 2023-06-02 3:06 ` pinskia at gcc dot gnu.org @ 2023-06-02 3:14 ` pinskia at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu.org @ 2023-06-02 3:14 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52490 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |7.5 Status|UNCONFIRMED |RESOLVED Resolution|--- |FIXED --- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- . ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2023-06-02 3:14 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-03-05 13:16 [Bug rtl-optimization/52490] New: RTL DCE removes trapping const libcalls rguenth at gcc dot gnu.org 2023-06-02 2:46 ` [Bug rtl-optimization/52490] " pinskia at gcc dot gnu.org 2023-06-02 2:53 ` pinskia at gcc dot gnu.org 2023-06-02 3:06 ` pinskia at gcc dot gnu.org 2023-06-02 3:14 ` pinskia at gcc dot gnu.org
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