d3d12: Move lower_sample_pos to microsoft/compiler

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19471>

src/gallium/drivers/d3d12/d3d12_compiler.cpp

@@ -1433,7 +1433,7 @@ d3d12_create_shader(struct d3d12_context *ctx,
                                             next ? next->current->nir->info.inputs_read : 0);
    } else {
       NIR_PASS_V(nir, nir_lower_fragcoord_wtrans);
-      NIR_PASS_V(nir, d3d12_lower_sample_pos);
+      NIR_PASS_V(nir, dxil_nir_lower_sample_pos);
       dxil_sort_ps_outputs(nir);
    }
 

src/gallium/drivers/d3d12/d3d12_nir_passes.c

@@ -888,27 +888,6 @@ d3d12_lower_triangle_strip(nir_shader *shader)
    NIR_PASS_V(shader, nir_lower_var_copies);
 }
 
-static bool
-is_sample_pos(const nir_instr *instr, const void *_data)
-{
-   if (instr->type != nir_instr_type_intrinsic)
-      return false;
-   nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
-   return intr->intrinsic == nir_intrinsic_load_sample_pos;
-}
-
-static nir_ssa_def *
-lower_sample_pos(nir_builder *b, nir_instr *instr, void *_data)
-{
-   return nir_load_sample_pos_from_id(b, 32, nir_load_sample_id(b));
-}
-
-bool
-d3d12_lower_sample_pos(nir_shader *s)
-{
-   return nir_shader_lower_instructions(s, is_sample_pos, lower_sample_pos, NULL);
-}
-
 static bool
 is_multisampling_instr(const nir_instr *instr, const void *_data)
 {

src/gallium/drivers/d3d12/d3d12_nir_passes.h

@@ -102,9 +102,6 @@ d3d12_lower_triangle_strip(nir_shader *shader);
 bool
 d3d12_lower_image_casts(nir_shader *s, struct d3d12_image_format_conversion_info *info);
 
-bool
-d3d12_lower_sample_pos(nir_shader *s);
-
 bool
 d3d12_disable_multisampling(nir_shader *s);
 

src/microsoft/compiler/dxil_nir.c

@@ -2156,3 +2156,24 @@ dxil_nir_ensure_position_writes(nir_shader *s)
                                        nir_metadata_block_index | nir_metadata_dominance,
                                        NULL);
 }
+
+static bool
+is_sample_pos(const nir_instr *instr, const void *_data)
+{
+   if (instr->type != nir_instr_type_intrinsic)
+      return false;
+   nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
+   return intr->intrinsic == nir_intrinsic_load_sample_pos;
+}
+
+static nir_ssa_def *
+lower_sample_pos(nir_builder *b, nir_instr *instr, void *_data)
+{
+   return nir_load_sample_pos_from_id(b, 32, nir_load_sample_id(b));
+}
+
+bool
+dxil_nir_lower_sample_pos(nir_shader *s)
+{
+   return nir_shader_lower_instructions(s, is_sample_pos, lower_sample_pos, NULL);
+}

src/microsoft/compiler/dxil_nir.h

@@ -77,6 +77,7 @@ bool dxil_nir_lower_ubo_array_one_to_static(nir_shader *s);
 bool dxil_nir_fix_io_uint_type(nir_shader *s, uint64_t in_mask, uint64_t out_mask);
 bool dxil_nir_lower_discard_and_terminate(nir_shader* s);
 bool dxil_nir_ensure_position_writes(nir_shader *s);
+bool dxil_nir_lower_sample_pos(nir_shader *s);
 
 #ifdef __cplusplus
 }