[Bug target/54888] GCC with -Os is faster than -O3 on some AVR code

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54888

Georg-Johann Lay <gjl at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |avr
           Priority|P3                          |P4
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2012-10-21
          Component|c                           |target
     Ever Confirmed|0                           |1

--- Comment #2 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-10-21 20:40:45 UTC ---
atxmega128d3 is not supported by avr-gcc, neither in 4.3 nor in 4.4 nor 4.5 nor
4.6.  Please report to the respective bug tracker, obviously some private
toolchain port.

Compiling with a current compiler that supports ATxmega128D3 (4.7 or newer)
stops compilation with errors.

And I actually don't understand teh issue: Optimizing for size does not require
to produce slow code.  The code may run fast.

If your program relies on slow executable code, the program is incorrect.