[Mesa-dev] [PATCH 1/2] i965/fs: Add debugging to constant combining pass.

[Iago Toral]

Reviewed-by: Iago Toral Quiroga <itoral at igalia.com>

On Mon, 2016-01-11 at 09:36 -0800, Matt Turner wrote:
> ---
>  .../drivers/dri/i965/brw_fs_combine_constants.cpp   | 21 ++++++++++++++++++++-
>  1 file changed, 20 insertions(+), 1 deletion(-)
> 
> diff --git a/src/mesa/drivers/dri/i965/brw_fs_combine_constants.cpp b/src/mesa/drivers/dri/i965/brw_fs_combine_constants.cpp
> index c5280ac..9141907 100644
> --- a/src/mesa/drivers/dri/i965/brw_fs_combine_constants.cpp
> +++ b/src/mesa/drivers/dri/i965/brw_fs_combine_constants.cpp
> @@ -39,6 +39,8 @@
>  
>  using namespace brw;
>  
> +static const bool debug = false;
> +
>  /* Returns whether an instruction could co-issue if its immediate source were
>   * replaced with a GRF source.
>   */
> @@ -265,7 +267,6 @@ fs_visitor::opt_combine_constants()
>     if (cfg->num_blocks != 1)
>        qsort(table.imm, table.len, sizeof(struct imm), compare);
>  
> -
>     /* Insert MOVs to load the constant values into GRFs. */
>     fs_reg reg(VGRF, alloc.allocate(dispatch_width / 8));
>     reg.stride = 0;
> @@ -303,6 +304,24 @@ fs_visitor::opt_combine_constants()
>        }
>     }
>  
> +   if (debug) {
> +      for (int i = 0; i < table.len; i++) {
> +         struct imm *imm = &table.imm[i];
> +
> +         printf("%.3fF - block %3d, reg %3d sub %2d, Uses: (%2d, %2d), "
> +                "IP: %4d to %4d, length %4d\n",
> +                imm->val,
> +                imm->block->num,
> +                imm->nr,
> +                imm->subreg_offset,
> +                imm->must_promote,
> +                imm->uses_by_coissue,
> +                imm->first_use_ip,
> +                imm->last_use_ip,
> +                imm->last_use_ip - imm->first_use_ip);
> +      }
> +   }
> +
>     ralloc_free(const_ctx);
>     invalidate_live_intervals();
>