ABI voilation

[Darryl Miles]

kanishk rastogi wrote:
> I wanted to know if when i specify -O[0-3] flag to gcc does gcc
> optimize the code even violating ABI for that specific arch.
> If yes can i specify gcc not to violate the ABI ....
> I am mostly concerned witht he ABI specification which tells how to
> call another function..

No.

It's not an optimization when you start breaking the rules, the results 
are not equivalent.

Also how would GCC know at compile time when its compiling a unit if 
this function would receive a performance benefit from violating the ABI 
with regards to linkage ?


Darryl