| /* |
| * Copyright © 2013 Intel Corporation |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| */ |
| |
| #include "link_uniform_block_active_visitor.h" |
| #include "program.h" |
| |
| link_uniform_block_active * |
| process_block(void *mem_ctx, struct hash_table *ht, ir_variable *var) |
| { |
| const uint32_t h = _mesa_hash_string(var->get_interface_type()->name); |
| const hash_entry *const existing_block = |
| _mesa_hash_table_search(ht, h, var->get_interface_type()->name); |
| |
| const glsl_type *const block_type = var->is_interface_instance() |
| ? var->type : var->get_interface_type(); |
| |
| |
| /* If a block with this block-name has not previously been seen, add it. |
| * If a block with this block-name has been seen, it must be identical to |
| * the block currently being examined. |
| */ |
| if (existing_block == NULL) { |
| link_uniform_block_active *const b = |
| rzalloc(mem_ctx, struct link_uniform_block_active); |
| |
| b->type = block_type; |
| b->has_instance_name = var->is_interface_instance(); |
| |
| if (var->data.explicit_binding) { |
| b->has_binding = true; |
| b->binding = var->data.binding; |
| } else { |
| b->has_binding = false; |
| b->binding = 0; |
| } |
| |
| _mesa_hash_table_insert(ht, h, var->get_interface_type()->name, |
| (void *) b); |
| return b; |
| } else { |
| link_uniform_block_active *const b = |
| (link_uniform_block_active *) existing_block->data; |
| |
| if (b->type != block_type |
| || b->has_instance_name != var->is_interface_instance()) |
| return NULL; |
| else |
| return b; |
| } |
| |
| assert(!"Should not get here."); |
| return NULL; |
| } |
| |
| ir_visitor_status |
| link_uniform_block_active_visitor::visit_enter(ir_dereference_array *ir) |
| { |
| ir_dereference_variable *const d = ir->array->as_dereference_variable(); |
| ir_variable *const var = (d == NULL) ? NULL : d->var; |
| |
| /* If the r-value being dereferenced is not a variable (e.g., a field of a |
| * structure) or is not a uniform block instance, continue. |
| * |
| * WARNING: It is not enough for the variable to be part of uniform block. |
| * It must represent the entire block. Arrays (or matrices) inside blocks |
| * that lack an instance name are handled by the ir_dereference_variable |
| * function. |
| */ |
| if (var == NULL |
| || !var->is_in_uniform_block() |
| || !var->is_interface_instance()) |
| return visit_continue; |
| |
| /* Process the block. Bail if there was an error. |
| */ |
| link_uniform_block_active *const b = |
| process_block(this->mem_ctx, this->ht, var); |
| if (b == NULL) { |
| linker_error(prog, |
| "uniform block `%s' has mismatching definitions", |
| var->get_interface_type()->name); |
| this->success = false; |
| return visit_stop; |
| } |
| |
| /* Block arrays must be declared with an instance name. |
| */ |
| assert(b->has_instance_name); |
| assert((b->num_array_elements == 0) == (b->array_elements == NULL)); |
| assert(b->type != NULL); |
| |
| /* Determine whether or not this array index has already been added to the |
| * list of active array indices. At this point all constant folding must |
| * have occurred, and the array index must be a constant. |
| */ |
| ir_constant *c = ir->array_index->as_constant(); |
| assert(c != NULL); |
| |
| const unsigned idx = c->get_uint_component(0); |
| |
| unsigned i; |
| for (i = 0; i < b->num_array_elements; i++) { |
| if (b->array_elements[i] == idx) |
| break; |
| } |
| |
| assert(i <= b->num_array_elements); |
| |
| if (i == b->num_array_elements) { |
| b->array_elements = reralloc(this->mem_ctx, |
| b->array_elements, |
| unsigned, |
| b->num_array_elements + 1); |
| |
| b->array_elements[b->num_array_elements] = idx; |
| |
| b->num_array_elements++; |
| } |
| |
| return visit_continue_with_parent; |
| } |
| |
| ir_visitor_status |
| link_uniform_block_active_visitor::visit(ir_dereference_variable *ir) |
| { |
| ir_variable *var = ir->var; |
| |
| if (!var->is_in_uniform_block()) |
| return visit_continue; |
| |
| assert(!var->is_interface_instance() || !var->type->is_array()); |
| |
| /* Process the block. Bail if there was an error. |
| */ |
| link_uniform_block_active *const b = |
| process_block(this->mem_ctx, this->ht, var); |
| if (b == NULL) { |
| linker_error(this->prog, |
| "uniform block `%s' has mismatching definitions", |
| var->get_interface_type()->name); |
| this->success = false; |
| return visit_stop; |
| } |
| |
| assert(b->num_array_elements == 0); |
| assert(b->array_elements == NULL); |
| assert(b->type != NULL); |
| |
| return visit_continue; |
| } |