[PATCH] adjust BB vectorization dump scanning

[Thomas Schwinge]

Hi Richard!

On 2020-10-08T13:34:02+0200, Richard Biener <rguenther@suse.de> wrote:
> It might be interesting to work on adding sth like
> dg-warning to look for -fopt-info-{optimized,missing} so
> we could directly annotate (not) vectorized loops instead of
> relying on fragile counts.

I'm maybe (likely?) misunderstanding what you're looking for, but just in
case I'm not, the following works already:

    --- gcc/testsuite/gcc.dg/vect/bb-slp-1.c
    +++ gcc/testsuite/gcc.dg/vect/bb-slp-1.c
    @@ -1,4 +1,5 @@
     /* { dg-require-effective-target vect_int } */
    +/* { dg-additional-options "-fopt-info-optimized-vec" } */

     #include <stdarg.h>
     #include "tree-vect.h"
    @@ -17,7 +18,7 @@ main1 (int dummy)

       for (i = 0; i < N; i++)
         {
    -      *pout++ = *pin++;
    +      *pout++ = *pin++; /* { dg-message "optimized: basic block part vectorized" } */
           *pout++ = *pin++;
           *pout++ = *pin++;
           *pout++ = *pin++;
    @@ -55,4 +56,3 @@ int main (void)
     }

     /* { dg-final { scan-tree-dump-not "can't force alignment" "slp1" } } */
    -/* { dg-final { scan-tree-dump-times "basic block vectorized" 1 "slp1" } } */


Grüße
 Thomas
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