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From: "jkuittinen293482 at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/55267] New: double operation giving different results depending on context and optimization level Date: Sat, 10 Nov 2012 17:47:00 -0000 [thread overview] Message-ID: <bug-55267-4@http.gcc.gnu.org/bugzilla/> (raw) 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; }
next reply other threads:[~2012-11-10 17:47 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-11-10 17:47 jkuittinen293482 at gmail dot com [this message] 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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