radeonsi: merge uses_persp_opcode_interp_sample/uses_linear_opcode_interp_sample

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6624>
diff --git a/src/gallium/drivers/radeonsi/si_shader.h b/src/gallium/drivers/radeonsi/si_shader.h
index 59c1d76..6535476 100644
--- a/src/gallium/drivers/radeonsi/si_shader.h
+++ b/src/gallium/drivers/radeonsi/si_shader.h
@@ -355,8 +355,7 @@
    bool uses_linear_center;
    bool uses_linear_centroid;
    bool uses_linear_sample;
-   bool uses_persp_opcode_interp_sample;
-   bool uses_linear_opcode_interp_sample;
+   bool uses_interp_at_sample;
    bool uses_instanceid;
    bool uses_drawid;
    bool uses_primid;
diff --git a/src/gallium/drivers/radeonsi/si_shader_nir.c b/src/gallium/drivers/radeonsi/si_shader_nir.c
index 8873aa2..ce05143 100644
--- a/src/gallium/drivers/radeonsi/si_shader_nir.c
+++ b/src/gallium/drivers/radeonsi/si_shader_nir.c
@@ -397,9 +397,6 @@
                info->uses_linear_centroid = true;
             else
                info->uses_linear_center = true;
-
-            if (intr->intrinsic == nir_intrinsic_load_barycentric_at_sample)
-               info->uses_linear_opcode_interp_sample = true;
          } else {
             if (intr->intrinsic == nir_intrinsic_load_barycentric_sample)
                info->uses_persp_sample = true;
@@ -407,10 +404,9 @@
                info->uses_persp_centroid = true;
             else
                info->uses_persp_center = true;
-
-            if (intr->intrinsic == nir_intrinsic_load_barycentric_at_sample)
-               info->uses_persp_opcode_interp_sample = true;
          }
+         if (intr->intrinsic == nir_intrinsic_load_barycentric_at_sample)
+            info->uses_interp_at_sample = true;
          break;
       }
       case nir_intrinsic_load_input:
diff --git a/src/gallium/drivers/radeonsi/si_state_shaders.c b/src/gallium/drivers/radeonsi/si_state_shaders.c
index 4fbbcf4..400b0de 100644
--- a/src/gallium/drivers/radeonsi/si_state_shaders.c
+++ b/src/gallium/drivers/radeonsi/si_state_shaders.c
@@ -1980,8 +1980,7 @@
                                                              sel->info.uses_linear_sample >
                                                           1;
 
-         if (sel->info.uses_persp_opcode_interp_sample ||
-             sel->info.uses_linear_opcode_interp_sample)
+         if (sel->info.uses_interp_at_sample)
             key->mono.u.ps.interpolate_at_sample_force_center = 1;
       }