[Mesa-stable] [PATCH] intel: compiler: vec4: add missing default 0 lod

[Matt Turner]

On Tue, Oct 3, 2017 at 8:05 AM, Lionel Landwerlin
<lionel.g.landwerlin at intel.com> wrote:
> We handle similar default valid for LOD in the fs backend for TXS/TXL.
> Without this we end up generating invalid MOV with a null src.
>
> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
> Cc: "17.2 17.1" <mesa-stable at lists.freedesktop.org>
> ---
>  src/intel/compiler/brw_vec4_nir.cpp | 9 +++++++++
>  1 file changed, 9 insertions(+)
>
> diff --git a/src/intel/compiler/brw_vec4_nir.cpp b/src/intel/compiler/brw_vec4_nir.cpp
> index 0a1caa9fad8..9200ffa0ed7 100644
> --- a/src/intel/compiler/brw_vec4_nir.cpp
> +++ b/src/intel/compiler/brw_vec4_nir.cpp
> @@ -2228,6 +2228,15 @@ vec4_visitor::nir_emit_texture(nir_tex_instr *instr)
>        }
>     }
>
> +   /* TXS and TXL require a LOD but not everything we implement using those
> +    * two opcodes provides one.  Provide a default LOD of 0.
> +    */
> +   if ((instr->op == nir_texop_txs ||
> +        instr->op == nir_texop_txl) &&
> +       lod.file == BAD_FILE) {
> +      lod = brw_imm_ud(0u);
> +   }

Reviewed-by: Matt Turner <mattst88 at gmail.com>

Really glad to see the EU validator catching bugs.