gcc 2.95.2 exception error, when optimizing

["PETER NORDLUND" <peter_nordlund at swipnet dot se>]

The code below behaves different (I guess faulty) when compiled with -O flag

compared to not having an -O flag.

Enclosed is also some .ii and .s files.

 

/Peter

/*-----------------------------*/

#include <iostream>

 

template <typename SINGLETON>
class Singleton {
public:
  ~Singleton() { };                    // NOTHROW
};

 

class Base {};
class Test: public Singleton<Base> {
public:
  class CtorFailure {}; // Exception class.
  ~Test() throw() { std::cerr << "~Test()" << std::endl; }
  Test() {
    static bool firstTime = true;

 

    // Simulating constructor failure.
    if (firstTime) {
      firstTime = false;
      std::cerr << "Test(): Throwing CtorFailure" << std::endl;
      throw CtorFailure();
    }
    std::cerr << "Test()" << std::endl;
  }
};

 

int main(int argc, const char** argv) {
  Test* tp;
  try {
    tp = new Test;
  } catch(const Test::CtorFailure&) {
    std::cerr << "Caught Test::Ctorfailure" << std::endl;
  }
  tp = new Test;
  delete tp;
  std::cerr << "exiting main" << std::endl;
  return 0; 
}
/*---------------------------------*/

// What I consider to be correct output.
src>>g++ -o a.out managed-singleton2-test.cpp
src>>a.out
Test(): Throwing CtorFailure
Caught Test::Ctorfailure
Test()
~Test()
exiting main

 

// What I consider to be faulty output.
src>>g++ -o a.out -O managed-singleton2-test.cpp
src>>a.out
Test(): Throwing CtorFailure
Test()
Test()
~Test()
exiting main

src>>uname -a
CYGWIN_NT-4.0 LILY 20.1 (0.3/1/1) 1998-12-3 20:39:18 i586 unknown
src>>g++ -v
Reading specs from file://F/ntprog/cygwin/gcc-2.95/install-2.95.2/H-i586-cygwin32/bin/../lib/gcc-lib/i586-cygwin32/2.95.2/specs
gcc version 2.95.2 19991024 (release)
#endif

 

 

Bug1.tgz