- bool progress = false;
-
- nir_foreach_function(function, shader) {
- nir_foreach_block(block, function->impl) {
- nir_foreach_instr(instr, block) {
- if (instr->type != nir_instr_type_intrinsic)
- continue;
-
- nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
- switch (intrin->intrinsic) {
- case nir_intrinsic_discard:
- intrin->intrinsic = nir_intrinsic_demote;
- shader->info.fs.uses_demote = true;
- break;
- case nir_intrinsic_discard_if:
- intrin->intrinsic = nir_intrinsic_demote_if;
- shader->info.fs.uses_demote = true;
- break;
- case nir_intrinsic_load_helper_invocation:
- intrin->intrinsic = nir_intrinsic_is_helper_invocation;
- break;
- default:
- continue;
- }
- progress = true;
- }
- }
- }
-
- return progress;
+ return nir_shader_instructions_pass(shader,
+ nir_lower_discard_to_demote_instr,
+ nir_metadata_all,
+ NULL);