[Bug lto/58042] New: MinGW GCC produces problematic x64 executable with -O2 -static -flto -m64

[stanley82521 at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58042

            Bug ID: 58042
           Summary: MinGW GCC produces problematic x64 executable with -O2
                    -static -flto -m64
           Product: gcc
           Version: 4.8.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: stanley82521 at gmail dot com

The toolchain I use is MinGW-builds from Sourceforge, which uses runtime lib
provided by MinGW-w64 project, and this issue also appears in Ruben's build
from MinGW-w64. The code snipe below can be used to reproduce the problem:

#include<iostream>
int main(){
std::cout << "Foo = " << 101 << std::endl;
return 0;
}

With "-O2 -flto -static -m64", GCC can produce a problematic x64 executable,
which will crash during execution. It will crash after output "Foo = ". This
issue appeared before the GCC 4.8.0 release and lasts till now, existing in the
4.8.1 and testing 4.9.0 build provided by MinGW-builds project. This problem
seems not a bug of MinGW-w64 runtime because compiling the source file without
any option described above can't reproduce the problem.