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25 * \file ir_validate.cpp
27 * Attempts to verify that various invariants of the IR tree are true.
29 * In particular, at the moment it makes sure that no single
30 * ir_instruction node except for ir_variable appears multiple times
31 * in the ir tree. ir_variable does appear multiple times: Once as a
32 * declaration in an exec_list, and multiple times as the endpoint of
33 * a dereference chain.
38 #include "ir_hierarchical_visitor.h"
39 #include "hash_table.h"
40 #include "glsl_types.h"
42 class ir_validate : public ir_hierarchical_visitor {
46 this->ht = hash_table_ctor(0, hash_table_pointer_hash,
47 hash_table_pointer_compare);
49 this->current_function = NULL;
51 this->callback = ir_validate::validate_ir;
57 hash_table_dtor(this->ht);
60 virtual ir_visitor_status visit(ir_variable *v);
61 virtual ir_visitor_status visit(ir_dereference_variable *ir);
62 virtual ir_visitor_status visit(ir_if *ir);
64 virtual ir_visitor_status visit_enter(ir_function *ir);
65 virtual ir_visitor_status visit_leave(ir_function *ir);
66 virtual ir_visitor_status visit_enter(ir_function_signature *ir);
68 static void validate_ir(ir_instruction *ir, void *data);
70 ir_function *current_function;
72 struct hash_table *ht;
77 ir_validate::visit(ir_dereference_variable *ir)
79 if ((ir->var == NULL) || (ir->var->as_variable() == NULL)) {
80 printf("ir_dereference_variable @ %p does not specify a variable %p\n",
85 if (hash_table_find(ht, ir->var) == NULL) {
86 printf("ir_dereference_variable @ %p specifies undeclared variable "
88 ir, ir->var->name, ir->var);
92 this->validate_ir(ir, this->data);
94 return visit_continue;
98 ir_validate::visit(ir_if *ir)
100 if (ir->condition->type != glsl_type::bool_type) {
101 printf("ir_if condition %s type instead of bool.\n",
102 ir->condition->type->name);
111 ir_validate::visit_enter(ir_function *ir)
113 /* Function definitions cannot be nested.
115 if (this->current_function != NULL) {
116 printf("Function definition nested inside another function "
118 printf("%s %p inside %s %p\n",
120 this->current_function->name, this->current_function);
124 /* Store the current function hierarchy being traversed. This is used
125 * by the function signature visitor to ensure that the signatures are
126 * linked with the correct functions.
128 this->current_function = ir;
130 this->validate_ir(ir, this->data);
132 return visit_continue;
136 ir_validate::visit_leave(ir_function *ir)
140 this->current_function = NULL;
141 return visit_continue;
145 ir_validate::visit_enter(ir_function_signature *ir)
147 if (this->current_function != ir->function()) {
148 printf("Function signature nested inside wrong function "
150 printf("%p inside %s %p instead of %s %p\n",
152 this->current_function->name, this->current_function,
153 ir->function_name(), ir->function());
157 this->validate_ir(ir, this->data);
159 return visit_continue;
163 ir_validate::visit(ir_variable *ir)
165 /* An ir_variable is the one thing that can (and will) appear multiple times
166 * in an IR tree. It is added to the hashtable so that it can be used
167 * in the ir_dereference_variable handler to ensure that a variable is
168 * declared before it is dereferenced.
170 hash_table_insert(ht, ir, ir);
171 return visit_continue;
175 ir_validate::validate_ir(ir_instruction *ir, void *data)
177 struct hash_table *ht = (struct hash_table *) data;
179 if (hash_table_find(ht, ir)) {
180 printf("Instruction node present twice in ir tree:\n");
185 hash_table_insert(ht, ir, ir);
189 check_node_type(ir_instruction *ir, void *data)
191 if (ir->ir_type <= ir_type_unset || ir->ir_type >= ir_type_max) {
192 printf("Instruction node with unset type\n");
193 ir->print(); printf("\n");
195 assert(ir->type != glsl_type::error_type);
199 validate_ir_tree(exec_list *instructions)
205 foreach_iter(exec_list_iterator, iter, *instructions) {
206 ir_instruction *ir = (ir_instruction *)iter.get();
208 visit_tree(ir, check_node_type, NULL);