[Bug tree-optimization/34099] [4.3 Regression] optimizer problem

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2007-11-15 10:21 -------
Confirmed.  Shorter testcase:

#include <complex>
#include <iostream>

typedef std::complex<double> NumType;

void
multiply(NumType a, NumType b, unsigned ac, NumType &ab)
{
  NumType s;
  for (unsigned j=0; j<ac; j++)
    s = a * b;
  ab = s;
}

int main()
{
  NumType a(1,2), b(3,-2), c;
  multiply(a, b, 1, c);
  std::cout << c << std::endl;
  return 0;
}

Looks like another SRA problem.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |aoliva at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
          Component|c++                         |tree-optimization
     Ever Confirmed|0                           |1
           Keywords|                            |wrong-code
      Known to fail|                            |4.3.0
      Known to work|                            |4.2.2
   Last reconfirmed|0000-00-00 00:00:00         |2007-11-15 10:21:31
               date|                            |
            Summary|optimizer problem           |[4.3 Regression] optimizer
                   |                            |problem
   Target Milestone|---                         |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34099