-static bool
-is_input(nir_intrinsic_instr *intrin)
-{
- return intrin->intrinsic == nir_intrinsic_load_input ||
- intrin->intrinsic == nir_intrinsic_load_per_vertex_input ||
- intrin->intrinsic == nir_intrinsic_load_interpolated_input ||
- intrin->intrinsic == nir_intrinsic_load_fs_input_interp_deltas;
-}
-
-static bool
-is_output(nir_intrinsic_instr *intrin)
-{
- return intrin->intrinsic == nir_intrinsic_load_output ||
- intrin->intrinsic == nir_intrinsic_load_per_vertex_output ||
- intrin->intrinsic == nir_intrinsic_store_output ||
- intrin->intrinsic == nir_intrinsic_store_per_vertex_output;
-}
-
-/**
- * In many cases, we just add the base and offset together, so there's no
- * reason to keep them separate. Sometimes, combining them is essential:
- * if a shader only accesses part of a compound variable (such as a matrix
- * or array), the variable's base may not actually exist in the VUE map.
- *
- * This pass adds constant offsets to instr->const_index[0], and resets
- * the offset source to 0. Non-constant offsets remain unchanged - since
- * we don't know what part of a compound variable is accessed, we allocate
- * storage for the entire thing.
- */
-
-static bool
-add_const_offset_to_base_block(nir_block *block, nir_builder *b,
- nir_variable_mode mode)
-{
- nir_foreach_instr_safe(instr, block) {
- if (instr->type != nir_instr_type_intrinsic)
- continue;
-
- nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
-
- if ((mode == nir_var_shader_in && is_input(intrin)) ||
- (mode == nir_var_shader_out && is_output(intrin))) {
- nir_src *offset = nir_get_io_offset_src(intrin);
-
- if (nir_src_is_const(*offset)) {
- intrin->const_index[0] += nir_src_as_uint(*offset);
- b->cursor = nir_before_instr(&intrin->instr);
- nir_instr_rewrite_src(&intrin->instr, offset,
- nir_src_for_ssa(nir_imm_int(b, 0)));
- }
- }
- }
- return true;
-}
-
-static void
-add_const_offset_to_base(nir_shader *nir, nir_variable_mode mode)
-{
- nir_foreach_function(f, nir) {
- if (f->impl) {
- nir_builder b;
- nir_builder_init(&b, f->impl);
- nir_foreach_block(block, f->impl) {
- add_const_offset_to_base_block(block, &b, mode);
- }
- }
- }
-}
-