--- /dev/null
+/*
+ * 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->interface_type->name);
+ const hash_entry *const existing_block =
+ _mesa_hash_table_search(ht, h, var->interface_type->name);
+
+ const glsl_type *const block_type = var->is_interface_instance()
+ ? var->type : var->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();
+
+ _mesa_hash_table_insert(ht, h, var->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->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 occured, 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->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;
+}
--- /dev/null
+/*
+ * 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.
+ */
+
+#pragma once
+#ifndef LINK_UNIFORM_BLOCK_ACTIVE_VISITOR_H
+#define LINK_UNIFORM_BLOCK_ACTIVE_VISITOR_H
+
+#include "ir.h"
+#include "ir_visitor.h"
+#include "glsl_types.h"
+#include "main/hash_table.h"
+
+struct link_uniform_block_active {
+ const glsl_type *type;
+
+ unsigned *array_elements;
+ unsigned num_array_elements;
+
+ bool has_instance_name;
+};
+
+class link_uniform_block_active_visitor : public ir_hierarchical_visitor {
+public:
+ link_uniform_block_active_visitor(void *mem_ctx, struct hash_table *ht,
+ struct gl_shader_program *prog)
+ : success(true), prog(prog), ht(ht), mem_ctx(mem_ctx)
+ {
+ /* empty */
+ }
+
+ virtual ir_visitor_status visit_enter(ir_dereference_array *);
+ virtual ir_visitor_status visit(ir_dereference_variable *);
+
+ bool success;
+
+private:
+ struct gl_shader_program *prog;
+ struct hash_table *ht;
+ void *mem_ctx;
+};
+
+#endif /* LINK_UNIFORM_BLOCK_ACTIVE_VISITOR_H */
projects / mesa.git / commitdiff