Strange conditional jumps on the POWER4

[Segher Boessenkool]

Roger Sayle wrote:
> With gcc-3.2 -O2 -ffast-math:
> N7 assignments         3.00000000000000000                  92.323    9.640

> With gcc-3.4 -O2 -ffast-math:
> N7 assignments         3.00000000000000000                 137.619    7.720

> With gcc-3.4 -O2 -ffast-math -mcpu=power4
> N7 assignments         3.00000000000000000                  88.334   12.090

That last one looks very bad, too.  Could you post source
and asm snippets for that?


Segher