[Mesa-dev] [PATCH v2 1.2/3] nir: Make nir_shader_gather_info() track texelFetch texture accesses.

[Kenneth Graunke]

For TGSI-based drivers, st_glsl_to_tgsi records this information.
For NIR-based drivers, nir_shader_gather_info() will do so.
---
 src/compiler/nir/nir_gather_info.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

Patches 1.1 and 1.2 here replace:
[PATCH 1/3] compiler: Track which textures are accessed via texelFetch().
now that Nicolai's patches have landed.

diff --git a/src/compiler/nir/nir_gather_info.c b/src/compiler/nir/nir_gather_info.c
index ac87bec46c0..f46cee7aa5e 100644
--- a/src/compiler/nir/nir_gather_info.c
+++ b/src/compiler/nir/nir_gather_info.c
@@ -264,8 +264,20 @@ gather_intrinsic_info(nir_intrinsic_instr *instr, nir_shader *shader)
 static void
 gather_tex_info(nir_tex_instr *instr, nir_shader *shader)
 {
-   if (instr->op == nir_texop_tg4)
+   switch (instr->op) {
+   case nir_texop_tg4:
       shader->info.uses_texture_gather = true;
+      break;
+   case nir_texop_txf:
+   case nir_texop_txf_ms:
+   case nir_texop_txf_ms_mcs:
+      shader->info.textures_used_by_txf |=
+         ((1 << MAX2(instr->texture_array_size, 1)) - 1) <<
+         instr->texture_index;
+      break;
+   default:
+      break;
+   }
 }
 
 static void
-- 
2.14.2