From f8cb0d8a44afb9c70f38e359ffe0ad57416e66a4 Mon Sep 17 00:00:00 2001
From: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Date: Thu, 10 Aug 2023 17:20:16 -0400
Subject: [PATCH] ntt: handle interp intrinsics as derefs

this fixes usage_mask gathering for fs inputs

cc: mesa-stable

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24634>
---
 src/gallium/auxiliary/nir/nir_to_tgsi_info.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/gallium/auxiliary/nir/nir_to_tgsi_info.c b/src/gallium/auxiliary/nir/nir_to_tgsi_info.c
index 90b041603f6..070d0c901a8 100644
--- a/src/gallium/auxiliary/nir/nir_to_tgsi_info.c
+++ b/src/gallium/auxiliary/nir/nir_to_tgsi_info.c
@@ -224,6 +224,10 @@ static void scan_instruction(const struct nir_shader *nir,
       case nir_intrinsic_ssbo_atomic_swap:
          info->writes_memory = true;
          break;
+      case nir_intrinsic_interp_deref_at_centroid:
+      case nir_intrinsic_interp_deref_at_offset:
+      case nir_intrinsic_interp_deref_at_sample:
+      case nir_intrinsic_interp_deref_at_vertex:
       case nir_intrinsic_load_deref: {
          const nir_variable *var = nir_intrinsic_get_var(intr, 0);
          const nir_variable_mode mode = var->data.mode;