Slowdowns in code generated by GCC>=3.3

[Daniel Berlin]

On Oct 20, 2004, at 1:30 PM, Zack Weinberg wrote:

> Földy Lajos <foldy@rmki.kfki.hu> writes:
>
>> and what about adding the real goto (which will be never executed, but
>> gcc will have "almost real" control flow):
>>
>>  	__asm__("jmp *%0" : : "a" (pc));
>> 	goto *pc;
>
> Nothing stops GCC from folding that asm into the common-ized jump
> block.

Right.
Never try to work around the express constraints given to you by the 
compiler, it will always win, and you will always lose.
:)