------- Comment #8 from pinskia at gcc dot gnu dot org 2007-10-03 22:07 ------- Subject: Re: attribute((aligned)) doesn't work for variables on the stack for greater than required alignement
On 3 Oct 2007 22:04:28 -0000, hjl at lucon dot org <[EMAIL PROTECTED]> wrote: > > > ------- Comment #7 from hjl at lucon dot org 2007-10-03 22:04 ------- > What is the performance impact of > > http://gcc.gnu.org/ml/gcc-patches/2007-05/msg01167.html The performance impact is non if the variables don't need aligned. Otherwise you get a small penality at the very begining for the alignment of the variable itself. Really this is only to be used with big alignments like 128byte alignment (for using with a DMA system like in the Cell). -- Pinski -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16660
