[Bug c++/11973] GCC 3.3 optimizer creates wrong code (i386/Linux)

[bangerth at dealii dot org]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11973


bangerth at dealii dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


------- Additional Comments From bangerth at dealii dot org  2003-08-18 21:55 -------
Your code is invalid. What you do is this: 
- in new a->X_alc() you call C::operator new, which returns a C* which you later access 
- however, C::operator new calls alc(), which returns the memory location of an object 
  which the compiler assumes is of type SList 
Such type games violate C++'s type aliasing rules. The solution is either to fix your 
code, or if you want to play hide-and-seek with the compiler, use -fno-strict-aliasing. 
 
W.