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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 "program/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_leave(ir_loop *ir);
65 virtual ir_visitor_status visit_enter(ir_function *ir);
66 virtual ir_visitor_status visit_leave(ir_function *ir);
67 virtual ir_visitor_status visit_enter(ir_function_signature *ir);
69 virtual ir_visitor_status visit_leave(ir_expression *ir);
71 virtual ir_visitor_status visit_enter(ir_assignment *ir);
73 static void validate_ir(ir_instruction *ir, void *data);
75 ir_function *current_function;
77 struct hash_table *ht;
82 ir_validate::visit(ir_dereference_variable *ir)
84 if ((ir->var == NULL) || (ir->var->as_variable() == NULL)) {
85 printf("ir_dereference_variable @ %p does not specify a variable %p\n",
86 (void *) ir, (void *) ir->var);
90 if (hash_table_find(ht, ir->var) == NULL) {
91 printf("ir_dereference_variable @ %p specifies undeclared variable "
93 (void *) ir, ir->var->name, (void *) ir->var);
97 this->validate_ir(ir, this->data);
99 return visit_continue;
103 ir_validate::visit(ir_if *ir)
105 if (ir->condition->type != glsl_type::bool_type) {
106 printf("ir_if condition %s type instead of bool.\n",
107 ir->condition->type->name);
113 return visit_continue;
118 ir_validate::visit_leave(ir_loop *ir)
120 if (ir->counter != NULL) {
121 if ((ir->from == NULL) || (ir->from == NULL) || (ir->increment == NULL)) {
122 printf("ir_loop has invalid loop controls:\n"
127 ir->counter, ir->from, ir->to, ir->increment);
131 if ((ir->cmp < ir_binop_less) || (ir->cmp > ir_binop_nequal)) {
132 printf("ir_loop has invalid comparitor %d\n", ir->cmp);
136 if ((ir->from != NULL) || (ir->from != NULL) || (ir->increment != NULL)) {
137 printf("ir_loop has invalid loop controls:\n"
142 ir->counter, ir->from, ir->to, ir->increment);
147 return visit_continue;
152 ir_validate::visit_enter(ir_function *ir)
154 /* Function definitions cannot be nested.
156 if (this->current_function != NULL) {
157 printf("Function definition nested inside another function "
159 printf("%s %p inside %s %p\n",
160 ir->name, (void *) ir,
161 this->current_function->name, (void *) this->current_function);
165 /* Store the current function hierarchy being traversed. This is used
166 * by the function signature visitor to ensure that the signatures are
167 * linked with the correct functions.
169 this->current_function = ir;
171 this->validate_ir(ir, this->data);
173 return visit_continue;
177 ir_validate::visit_leave(ir_function *ir)
179 assert(talloc_parent(ir->name) == ir);
181 this->current_function = NULL;
182 return visit_continue;
186 ir_validate::visit_enter(ir_function_signature *ir)
188 if (this->current_function != ir->function()) {
189 printf("Function signature nested inside wrong function "
191 printf("%p inside %s %p instead of %s %p\n",
193 this->current_function->name, (void *) this->current_function,
194 ir->function_name(), (void *) ir->function());
198 this->validate_ir(ir, this->data);
200 return visit_continue;
204 ir_validate::visit_leave(ir_expression *ir)
206 switch (ir->operation) {
207 case ir_unop_bit_not:
208 assert(ir->operands[0]->type == ir->type);
210 case ir_unop_logic_not:
211 assert(ir->type->base_type == GLSL_TYPE_BOOL);
212 assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
221 assert(ir->type == ir->operands[0]->type);
228 assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
229 assert(ir->type == ir->operands[0]->type);
233 assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
234 assert(ir->type->base_type == GLSL_TYPE_INT);
237 assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
238 assert(ir->type->base_type == GLSL_TYPE_FLOAT);
241 assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
242 assert(ir->type->base_type == GLSL_TYPE_BOOL);
245 assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
246 assert(ir->type->base_type == GLSL_TYPE_FLOAT);
249 assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
250 assert(ir->type->base_type == GLSL_TYPE_BOOL);
253 assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
254 assert(ir->type->base_type == GLSL_TYPE_INT);
257 assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
258 assert(ir->type->base_type == GLSL_TYPE_FLOAT);
262 assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
263 assert(ir->type == glsl_type::bool_type);
274 assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
275 assert(ir->operands[0]->type == ir->type);
279 /* XXX what can we assert here? */
290 if (ir->operands[0]->type->is_scalar())
291 assert(ir->operands[1]->type == ir->type);
292 else if (ir->operands[1]->type->is_scalar())
293 assert(ir->operands[0]->type == ir->type);
294 else if (ir->operands[0]->type->is_vector() &&
295 ir->operands[1]->type->is_vector()) {
296 assert(ir->operands[0]->type == ir->operands[1]->type);
297 assert(ir->operands[0]->type == ir->type);
302 case ir_binop_greater:
303 case ir_binop_lequal:
304 case ir_binop_gequal:
306 case ir_binop_nequal:
307 /* The semantics of the IR operators differ from the GLSL <, >, <=, >=,
308 * ==, and != operators. The IR operators perform a component-wise
309 * comparison on scalar or vector types and return a boolean scalar or
310 * vector type of the same size.
312 assert(ir->type->base_type == GLSL_TYPE_BOOL);
313 assert(ir->operands[0]->type == ir->operands[1]->type);
314 assert(ir->operands[0]->type->is_vector()
315 || ir->operands[0]->type->is_scalar());
316 assert(ir->operands[0]->type->vector_elements
317 == ir->type->vector_elements);
320 case ir_binop_all_equal:
321 case ir_binop_any_nequal:
322 /* GLSL == and != operate on scalars, vectors, matrices and arrays, and
323 * return a scalar boolean. The IR matches that.
325 assert(ir->type == glsl_type::bool_type);
326 assert(ir->operands[0]->type == ir->operands[1]->type);
329 case ir_binop_lshift:
330 case ir_binop_rshift:
331 case ir_binop_bit_and:
332 case ir_binop_bit_xor:
333 case ir_binop_bit_or:
334 assert(ir->operands[0]->type == ir->operands[1]->type);
335 assert(ir->type == ir->operands[0]->type);
336 assert(ir->type->base_type == GLSL_TYPE_INT ||
337 ir->type->base_type == GLSL_TYPE_UINT);
340 case ir_binop_logic_and:
341 case ir_binop_logic_xor:
342 case ir_binop_logic_or:
343 assert(ir->type == glsl_type::bool_type);
344 assert(ir->operands[0]->type == glsl_type::bool_type);
345 assert(ir->operands[1]->type == glsl_type::bool_type);
349 assert(ir->type == glsl_type::float_type);
350 assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
351 assert(ir->operands[0]->type->is_vector());
352 assert(ir->operands[0]->type == ir->operands[1]->type);
356 assert(ir->operands[0]->type == glsl_type::vec3_type);
357 assert(ir->operands[1]->type == glsl_type::vec3_type);
358 assert(ir->type == glsl_type::vec3_type);
362 return visit_continue;
366 ir_validate::visit(ir_variable *ir)
368 /* An ir_variable is the one thing that can (and will) appear multiple times
369 * in an IR tree. It is added to the hashtable so that it can be used
370 * in the ir_dereference_variable handler to ensure that a variable is
371 * declared before it is dereferenced.
374 assert(talloc_parent(ir->name) == ir);
376 hash_table_insert(ht, ir, ir);
377 return visit_continue;
381 ir_validate::visit_enter(ir_assignment *ir)
383 const ir_dereference *const lhs = ir->lhs;
384 if (lhs->type->is_scalar() || lhs->type->is_vector()) {
385 if (ir->write_mask == 0) {
386 printf("Assignment LHS is %s, but write mask is 0:\n",
387 lhs->type->is_scalar() ? "scalar" : "vector");
392 /* Mask of fields that do not exist in the destination. These should
393 * not be written by the assignment.
395 const unsigned invalid_mask = ~((1U << lhs->type->components()) - 1);
397 if ((invalid_mask & ir->write_mask) != 0) {
398 printf("Assignment write mask enables invalid components for "
399 "type %s:\n", lhs->type->name);
405 this->validate_ir(ir, this->data);
407 return visit_continue;
411 ir_validate::validate_ir(ir_instruction *ir, void *data)
413 struct hash_table *ht = (struct hash_table *) data;
415 if (hash_table_find(ht, ir)) {
416 printf("Instruction node present twice in ir tree:\n");
421 hash_table_insert(ht, ir, ir);
425 check_node_type(ir_instruction *ir, void *data)
429 if (ir->ir_type <= ir_type_unset || ir->ir_type >= ir_type_max) {
430 printf("Instruction node with unset type\n");
431 ir->print(); printf("\n");
433 assert(ir->type != glsl_type::error_type);
437 validate_ir_tree(exec_list *instructions)
443 foreach_iter(exec_list_iterator, iter, *instructions) {
444 ir_instruction *ir = (ir_instruction *)iter.get();
446 visit_tree(ir, check_node_type, NULL);