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[Bug target/39678] std::transform is incorrect with std::multiples and bind2nd for complex<float>
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 7 Apr 2009 14:51:42 -0000
- Subject: [Bug target/39678] std::transform is incorrect with std::multiples and bind2nd for complex<float>
- References: <bug-39678-15185@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #5 from rguenth at gcc dot gnu dot org 2009-04-07 14:51 -------
The expected output is
10 10
10 10
(10,0) (10,0)
(10,0) (10,0)
correct? With -O0 I get
10 10
10 10
(nan,nan) (nan,nan)
(10,0) (10,0)
while for -m32 it is ok. So it appears only the float variant is affected?
Thus, reduced testcase:
#include <vector>
#include <algorithm>
#include <complex>
extern "C" void abort(void);
int main()
{
std::vector<std::complex<float> > vecc(2, std::complex<float>(2.));
std::vector<std::complex<float> > result(2);
// Test vector * scalar.
std::transform (vecc.begin(), vecc.end(), result.begin(),
bind2nd(std::multiplies<std::complex<float> >(),
std::complex<float>(4.)));
if (result[0].real() != 8.
|| result[0].imag() != 0.
|| result[1].real() != 8.
|| result[1].imag() != 0.)
abort ();
return 0;
}
fails for me at -O0 and -O1 in 64bits.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Component|c++ |target
Ever Confirmed|0 |1
Keywords| |wrong-code
Known to fail| |4.3.3 4.4.0
Last reconfirmed|0000-00-00 00:00:00 |2009-04-07 14:51:42
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39678