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* [Bug c++/101634] New: Vectorize optimisations trigger floating point exception
@ 2021-07-27 7:52 gcc at wdqb dot uk
2021-07-27 11:10 ` [Bug tree-optimization/101634] " rguenth at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: gcc at wdqb dot uk @ 2021-07-27 7:52 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101634
Bug ID: 101634
Summary: Vectorize optimisations trigger floating point
exception
Product: gcc
Version: 11.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: gcc at wdqb dot uk
Target Milestone: ---
Created attachment 51208
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51208&action=edit
Code that reproduces the issue
I am using g++ 11.1.1 on OpenSUSE Tumbleweed 20210713.
When compiled with `g++ -O3 example.cpp` the code snippet triggers a floating
point exception and the program exits through the `signalHandler` function. I
believe this behaviour to be incorrect.
When compiled with `g++ -O3 -fno-tree-slp-vectorize example.cpp` (or any lower
level of optimisation) the exception is not triggered and the program exits
normally.
When compiled with any older version of `g++` with `O3` the exception is not
triggered and the program exits normally.
The program can also be modified to read it's input values from a file (see
commented section). This is shown to prove that the optimisation is not
dependent on the values being available at compile time. Indeed, this is a
snippet of a larger program in which the values are read in from a file.
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug tree-optimization/101634] Vectorize optimisations trigger floating point exception 2021-07-27 7:52 [Bug c++/101634] New: Vectorize optimisations trigger floating point exception gcc at wdqb dot uk @ 2021-07-27 11:10 ` rguenth at gcc dot gnu.org 2021-07-27 14:25 ` gcc at wdqb dot uk 2022-12-29 2:34 ` pinskia at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: rguenth at gcc dot gnu.org @ 2021-07-27 11:10 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101634 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |DUPLICATE --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- I believe the issue has been fixed already and is a duplicate of PR100778. There's an updated GCC 11 package pending in https://build.opensuse.org/project/show/openSUSE:Factory:Staging:A which you could verify against (or in devel:gcc which should even be published). A locally built g++ from the GCC 11 branch doesn't reproduce the issue for me. *** This bug has been marked as a duplicate of bug 100778 *** ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/101634] Vectorize optimisations trigger floating point exception 2021-07-27 7:52 [Bug c++/101634] New: Vectorize optimisations trigger floating point exception gcc at wdqb dot uk 2021-07-27 11:10 ` [Bug tree-optimization/101634] " rguenth at gcc dot gnu.org @ 2021-07-27 14:25 ` gcc at wdqb dot uk 2022-12-29 2:34 ` pinskia at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: gcc at wdqb dot uk @ 2021-07-27 14:25 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101634 William Bainbridge <gcc at wdqb dot uk> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|DUPLICATE |FIXED --- Comment #2 from William Bainbridge <gcc at wdqb dot uk> --- Thank you for looking into it. I have verified that gcc-11.2-RC-20210721 fixes the issue. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/101634] Vectorize optimisations trigger floating point exception 2021-07-27 7:52 [Bug c++/101634] New: Vectorize optimisations trigger floating point exception gcc at wdqb dot uk 2021-07-27 11:10 ` [Bug tree-optimization/101634] " rguenth at gcc dot gnu.org 2021-07-27 14:25 ` gcc at wdqb dot uk @ 2022-12-29 2:34 ` pinskia at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2022-12-29 2:34 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101634 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|FIXED |DUPLICATE --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- *** This bug has been marked as a duplicate of bug 100778 *** ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2022-12-29 2:34 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-07-27 7:52 [Bug c++/101634] New: Vectorize optimisations trigger floating point exception gcc at wdqb dot uk 2021-07-27 11:10 ` [Bug tree-optimization/101634] " rguenth at gcc dot gnu.org 2021-07-27 14:25 ` gcc at wdqb dot uk 2022-12-29 2:34 ` pinskia at gcc dot gnu.org
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