reverse conditionnal jump

[Georg-Johann Lay]

BELBACHIR Selim schrieb:
> Hi,
> 
> I'm still developping a new private target backend (gcc4.5.2) and I
> noticed something strange in the assembler generated for conditionnal
> jump.

Maybe unfortunate defnition of branch costs or rtx costs?

> How can I tell GCC to perform the best conditionnal jump by sometimes
> reversing the comparison ?

You can expand to a form that's best.
Moreover there is CANONICALIZE_COMPARISON hook.

> Regards,
> 
> Selim