[Bug c++/23497] New: [REGRESSION] Bogus 'is used uninitialized...' warning about std::complex<T>

["jan at etpmod dot phys dot tue dot nl" <gcc-bugzilla at gcc dot gnu dot org>]

With today's trunk, 
  
#include <complex>  
void f()  
{  
        std::complex<double> c1(.0),c2(.0);  
        c1*=c2;  
}  
 
g++ -c -O2 -Wall uninit.cpp  
  
Gives: 
 
/home/jan/local/gcc-head/lib/gcc/i686-pc-linux-gnu/4.1.0/../../../../include/c++/4.1.0/complex:1289: 
warning: &#8216;__t&#8217; is used uninitialized in this function 
 
Which is bogus. This hapens only when optimizing with -O[123] AND -g.

-- 
           Summary: [REGRESSION] Bogus 'is used uninitialized...' warning
                    about std::complex<T>
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jan at etpmod dot phys dot tue dot nl
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-suse-linux
  GCC host triplet: i686-suse-linux
GCC target triplet: i686-suse-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23497