+static void
+llvm_middle_end_prepare_tcs(struct llvm_middle_end *fpme)
+{
+ struct draw_context *draw = fpme->draw;
+ struct draw_llvm *llvm = fpme->llvm;
+ struct draw_tess_ctrl_shader *tcs = draw->tcs.tess_ctrl_shader;
+ struct draw_tcs_llvm_variant_key *key;
+ struct draw_tcs_llvm_variant *variant = NULL;
+ struct draw_tcs_llvm_variant_list_item *li;
+ struct llvm_tess_ctrl_shader *shader = llvm_tess_ctrl_shader(tcs);
+ char store[DRAW_TCS_LLVM_MAX_VARIANT_KEY_SIZE];
+ unsigned i;
+
+ key = draw_tcs_llvm_make_variant_key(llvm, store);
+
+ /* Search shader's list of variants for the key */
+ li = first_elem(&shader->variants);
+ while (!at_end(&shader->variants, li)) {
+ if (memcmp(&li->base->key, key, shader->variant_key_size) == 0) {
+ variant = li->base;
+ break;
+ }
+ li = next_elem(li);
+ }
+
+ if (variant) {
+ /* found the variant, move to head of global list (for LRU) */
+ move_to_head(&llvm->tcs_variants_list, &variant->list_item_global);
+ }
+ else {
+ /* Need to create new variant */
+
+ /* First check if we've created too many variants. If so, free
+ * 3.125% of the LRU to avoid using too much memory.
+ */
+ if (llvm->nr_tcs_variants >= DRAW_MAX_SHADER_VARIANTS) {
+ if (gallivm_debug & GALLIVM_DEBUG_PERF) {
+ debug_printf("Evicting TCS: %u tcs variants,\t%u total variants\n",
+ shader->variants_cached, llvm->nr_tcs_variants);
+ }
+
+ /*
+ * XXX: should we flush here ?
+ */
+ for (i = 0; i < DRAW_MAX_SHADER_VARIANTS / 32; i++) {
+ struct draw_tcs_llvm_variant_list_item *item;
+ if (is_empty_list(&llvm->tcs_variants_list)) {
+ break;
+ }
+ item = last_elem(&llvm->tcs_variants_list);
+ assert(item);
+ assert(item->base);
+ draw_tcs_llvm_destroy_variant(item->base);
+ }
+ }
+
+ variant = draw_tcs_llvm_create_variant(llvm, 0, key);
+
+ if (variant) {
+ insert_at_head(&shader->variants, &variant->list_item_local);
+ insert_at_head(&llvm->tcs_variants_list,
+ &variant->list_item_global);
+ llvm->nr_tcs_variants++;
+ shader->variants_cached++;
+ }
+ }
+
+ tcs->current_variant = variant;
+}
+
+static void
+llvm_middle_end_prepare_tes(struct llvm_middle_end *fpme)
+{
+ struct draw_context *draw = fpme->draw;
+ struct draw_llvm *llvm = fpme->llvm;
+ struct draw_tess_eval_shader *tes = draw->tes.tess_eval_shader;
+ struct draw_tes_llvm_variant_key *key;
+ struct draw_tes_llvm_variant *variant = NULL;
+ struct draw_tes_llvm_variant_list_item *li;
+ struct llvm_tess_eval_shader *shader = llvm_tess_eval_shader(tes);
+ char store[DRAW_TES_LLVM_MAX_VARIANT_KEY_SIZE];
+ unsigned i;
+
+ key = draw_tes_llvm_make_variant_key(llvm, store);
+
+ /* Search shader's list of variants for the key */
+ li = first_elem(&shader->variants);
+ while (!at_end(&shader->variants, li)) {
+ if (memcmp(&li->base->key, key, shader->variant_key_size) == 0) {
+ variant = li->base;
+ break;
+ }
+ li = next_elem(li);
+ }
+
+ if (variant) {
+ /* found the variant, move to head of global list (for LRU) */
+ move_to_head(&llvm->tes_variants_list, &variant->list_item_global);
+ }
+ else {
+ /* Need to create new variant */
+
+ /* First check if we've created too many variants. If so, free
+ * 3.125% of the LRU to avoid using too much memory.
+ */
+ if (llvm->nr_tes_variants >= DRAW_MAX_SHADER_VARIANTS) {
+ if (gallivm_debug & GALLIVM_DEBUG_PERF) {
+ debug_printf("Evicting TES: %u tes variants,\t%u total variants\n",
+ shader->variants_cached, llvm->nr_tes_variants);
+ }
+
+ /*
+ * XXX: should we flush here ?
+ */
+ for (i = 0; i < DRAW_MAX_SHADER_VARIANTS / 32; i++) {
+ struct draw_tes_llvm_variant_list_item *item;
+ if (is_empty_list(&llvm->tes_variants_list)) {
+ break;
+ }
+ item = last_elem(&llvm->tes_variants_list);
+ assert(item);
+ assert(item->base);
+ draw_tes_llvm_destroy_variant(item->base);
+ }
+ }
+
+ variant = draw_tes_llvm_create_variant(llvm, tes->info.num_outputs, key);
+
+ if (variant) {
+ insert_at_head(&shader->variants, &variant->list_item_local);
+ insert_at_head(&llvm->tes_variants_list,
+ &variant->list_item_global);
+ llvm->nr_tes_variants++;
+ shader->variants_cached++;
+ }
+ }
+
+ tes->current_variant = variant;
+}
+