Re: gcc4.0 autovect-branch

[Devang Patel <dpatel at apple dot com>]

On Dec 17, 2004, at 8:47 AM, Villemin Ryusuke wrote:

> Hi,
>
> I might be missing something simple and obvious, but I can't find out 
> what :
> I picked up gcc4.0 in the autovect-branch, compiled it successfully 
> but can t make it vectorize anything.
>
> int a[256], b[256], c[256];
>
> foo () {
>   int i;
>   for (i=0; i<256; i++){
>     a[i] = b[i] + c[i];
>   }
> }
>
> compiled with :
> "gcc -O2 -msse2 -ftree-vectorize -fdump-tree-vect-stats vecto.c".

Compiler is able to vectorize this loop on powerpc-darwin.

> I expect to see a "LOOP VECTORIZED." (or at least "not vectorized:"), 
> but I have nothing...

Do you see vecto.c.t53.vect ? What does it say?
If you do not see vecto.c.t53.vect then somehow vectorizer is not 
triggered.

-
Devang