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* [Bug c++/55267] New: double operation giving different results depending on context and optimization level
@ 2012-11-10 17:47 jkuittinen293482 at gmail dot com
2012-11-10 17:49 ` [Bug c++/55267] " pinskia at gcc dot gnu.org
2012-11-12 14:53 ` paolo.carlini at oracle dot com
0 siblings, 2 replies; 3+ messages in thread
From: jkuittinen293482 at gmail dot com @ 2012-11-10 17:47 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55267
Bug #: 55267
Summary: double operation giving different results depending on
context and optimization level
Classification: Unclassified
Product: gcc
Version: 4.7.2
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: jkuittinen293482@gmail.com
/*
* the following code outputs ":o" on 4.7.2 when compiled with -O0
* and ":)" when compiled with -O1
*
*/
#include <iostream>
class Plap
{
public:
double value;
Plap(int a, int b)
{
value = (double)a / (double)b;
}
};
int main()
{
int i = 1;
int j = 3;
Plap plap(i, j);
if (plap.value != ((double)i / (double)j))
std::cout << ":o" << std::endl;
else
std::cout << ":)" << std::endl;
return 0;
}
^ permalink raw reply [flat|nested] 3+ messages in thread* [Bug c++/55267] double operation giving different results depending on context and optimization level 2012-11-10 17:47 [Bug c++/55267] New: double operation giving different results depending on context and optimization level jkuittinen293482 at gmail dot com @ 2012-11-10 17:49 ` pinskia at gcc dot gnu.org 2012-11-12 14:53 ` paolo.carlini at oracle dot com 1 sibling, 0 replies; 3+ messages in thread From: pinskia at gcc dot gnu.org @ 2012-11-10 17:49 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55267 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Severity|major |normal --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-11-10 17:49:20 UTC --- I bet this is a dup of bug 323. ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/55267] double operation giving different results depending on context and optimization level 2012-11-10 17:47 [Bug c++/55267] New: double operation giving different results depending on context and optimization level jkuittinen293482 at gmail dot com 2012-11-10 17:49 ` [Bug c++/55267] " pinskia at gcc dot gnu.org @ 2012-11-12 14:53 ` paolo.carlini at oracle dot com 1 sibling, 0 replies; 3+ messages in thread From: paolo.carlini at oracle dot com @ 2012-11-12 14:53 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55267 Paolo Carlini <paolo.carlini at oracle dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution| |DUPLICATE --- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-11-12 14:53:28 UTC --- Dup *** This bug has been marked as a duplicate of bug 323 *** ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2012-11-12 14:53 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-11-10 17:47 [Bug c++/55267] New: double operation giving different results depending on context and optimization level jkuittinen293482 at gmail dot com 2012-11-10 17:49 ` [Bug c++/55267] " pinskia at gcc dot gnu.org 2012-11-12 14:53 ` paolo.carlini at oracle dot com
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