+void nir_inline_function_impl(struct nir_builder *b,
+ const nir_function_impl *impl,
+ nir_ssa_def **params)
+{
+ nir_function_impl *copy = nir_function_impl_clone(b->shader, impl);
+
+ /* Insert a nop at the cursor so we can keep track of where things are as
+ * we add/remove stuff from the CFG.
+ */
+ nir_intrinsic_instr *nop =
+ nir_intrinsic_instr_create(b->shader, nir_intrinsic_nop);
+ nir_builder_instr_insert(b, &nop->instr);
+
+ exec_list_append(&b->impl->locals, ©->locals);
+ exec_list_append(&b->impl->registers, ©->registers);
+
+ nir_foreach_block(block, copy) {
+ nir_foreach_instr_safe(instr, block) {
+ /* Returns have to be lowered for this to work */
+ assert(instr->type != nir_instr_type_jump ||
+ nir_instr_as_jump(instr)->type != nir_jump_return);
+
+ if (instr->type != nir_instr_type_intrinsic)
+ continue;
+
+ nir_intrinsic_instr *load = nir_instr_as_intrinsic(instr);
+ if (load->intrinsic != nir_intrinsic_load_param)
+ continue;
+
+ unsigned param_idx = nir_intrinsic_param_idx(load);
+ assert(param_idx < impl->function->num_params);
+ assert(load->dest.is_ssa);
+ nir_ssa_def_rewrite_uses(&load->dest.ssa,
+ nir_src_for_ssa(params[param_idx]));
+
+ /* Remove any left-over load_param intrinsics because they're soon
+ * to be in another function and therefore no longer valid.
+ */
+ nir_instr_remove(&load->instr);
+ }
+ }
+
+ /* Pluck the body out of the function and place it here */
+ nir_cf_list body;
+ nir_cf_list_extract(&body, ©->body);
+ nir_cf_reinsert(&body, nir_before_instr(&nop->instr));
+
+ b->cursor = nir_instr_remove(&nop->instr);
+}
+