[Bug c++/42810] Enumeration with sequential values has its for-loop exit condition optimized out.

[pinskia at gcc dot gnu dot org]

------- Comment #20 from pinskia at gcc dot gnu dot org  2010-01-27 21:10 
-------
(In reply to comment #19)
> Try:
Actually that code is defined as signed char++ is defined to be signed char =
(signed char) ((int)i + 1); by the C/C++ promotion rules.

#include <stdio.h>
main()
{
    for (signed i = 1 ; i >= -2 ; i++)
    {
        printf( "%d ", i);
    }
}

---- CUT ---
That will cause different behavior at different optimization levels.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42810