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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);
70 virtual ir_visitor_status visit_leave(ir_swizzle *ir);
72 virtual ir_visitor_status visit_enter(ir_assignment *ir);
73 virtual ir_visitor_status visit_enter(ir_call *ir);
75 static void validate_ir(ir_instruction *ir, void *data);
77 ir_function *current_function;
79 struct hash_table *ht;
84 ir_validate::visit(ir_dereference_variable *ir)
86 if ((ir->var == NULL) || (ir->var->as_variable() == NULL)) {
87 printf("ir_dereference_variable @ %p does not specify a variable %p\n",
88 (void *) ir, (void *) ir->var);
92 if (hash_table_find(ht, ir->var) == NULL) {
93 printf("ir_dereference_variable @ %p specifies undeclared variable "
95 (void *) ir, ir->var->name, (void *) ir->var);
99 this->validate_ir(ir, this->data);
101 return visit_continue;
105 ir_validate::visit(ir_if *ir)
107 if (ir->condition->type != glsl_type::bool_type) {
108 printf("ir_if condition %s type instead of bool.\n",
109 ir->condition->type->name);
115 return visit_continue;
120 ir_validate::visit_leave(ir_loop *ir)
122 if (ir->counter != NULL) {
123 if ((ir->from == NULL) || (ir->from == NULL) || (ir->increment == NULL)) {
124 printf("ir_loop has invalid loop controls:\n"
129 (void *) ir->counter, (void *) ir->from, (void *) ir->to,
130 (void *) ir->increment);
134 if ((ir->cmp < ir_binop_less) || (ir->cmp > ir_binop_nequal)) {
135 printf("ir_loop has invalid comparitor %d\n", ir->cmp);
139 if ((ir->from != NULL) || (ir->from != NULL) || (ir->increment != NULL)) {
140 printf("ir_loop has invalid loop controls:\n"
145 (void *) ir->counter, (void *) ir->from, (void *) ir->to,
146 (void *) ir->increment);
151 return visit_continue;
156 ir_validate::visit_enter(ir_function *ir)
158 /* Function definitions cannot be nested.
160 if (this->current_function != NULL) {
161 printf("Function definition nested inside another function "
163 printf("%s %p inside %s %p\n",
164 ir->name, (void *) ir,
165 this->current_function->name, (void *) this->current_function);
169 /* Store the current function hierarchy being traversed. This is used
170 * by the function signature visitor to ensure that the signatures are
171 * linked with the correct functions.
173 this->current_function = ir;
175 this->validate_ir(ir, this->data);
177 /* Verify that all of the things stored in the list of signatures are,
178 * in fact, function signatures.
180 foreach_list(node, &ir->signatures) {
181 ir_instruction *sig = (ir_instruction *) node;
183 if (sig->ir_type != ir_type_function_signature) {
184 printf("Non-signature in signature list of function `%s'\n",
190 return visit_continue;
194 ir_validate::visit_leave(ir_function *ir)
196 assert(ralloc_parent(ir->name) == ir);
198 this->current_function = NULL;
199 return visit_continue;
203 ir_validate::visit_enter(ir_function_signature *ir)
205 if (this->current_function != ir->function()) {
206 printf("Function signature nested inside wrong function "
208 printf("%p inside %s %p instead of %s %p\n",
210 this->current_function->name, (void *) this->current_function,
211 ir->function_name(), (void *) ir->function());
215 if (ir->return_type == NULL) {
216 printf("Function signature %p for function %s has NULL return type.\n",
217 (void *) ir, ir->function_name());
221 this->validate_ir(ir, this->data);
223 return visit_continue;
227 ir_validate::visit_leave(ir_expression *ir)
229 switch (ir->operation) {
230 case ir_unop_bit_not:
231 assert(ir->operands[0]->type == ir->type);
233 case ir_unop_logic_not:
234 assert(ir->type->base_type == GLSL_TYPE_BOOL);
235 assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
244 assert(ir->type == ir->operands[0]->type);
251 assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
252 assert(ir->type == ir->operands[0]->type);
256 assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
257 assert(ir->type->base_type == GLSL_TYPE_INT);
260 assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
261 assert(ir->type->base_type == GLSL_TYPE_FLOAT);
264 assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
265 assert(ir->type->base_type == GLSL_TYPE_BOOL);
268 assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
269 assert(ir->type->base_type == GLSL_TYPE_FLOAT);
272 assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
273 assert(ir->type->base_type == GLSL_TYPE_BOOL);
276 assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
277 assert(ir->type->base_type == GLSL_TYPE_INT);
280 assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
281 assert(ir->type->base_type == GLSL_TYPE_FLOAT);
284 assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
285 assert(ir->type->base_type == GLSL_TYPE_UINT);
288 assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
289 assert(ir->type->base_type == GLSL_TYPE_INT);
293 assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
294 assert(ir->type == glsl_type::bool_type);
298 case ir_unop_round_even:
304 case ir_unop_sin_reduced:
305 case ir_unop_cos_reduced:
308 assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
309 assert(ir->operands[0]->type == ir->type);
313 /* XXX what can we assert here? */
324 if (ir->operands[0]->type->is_scalar())
325 assert(ir->operands[1]->type == ir->type);
326 else if (ir->operands[1]->type->is_scalar())
327 assert(ir->operands[0]->type == ir->type);
328 else if (ir->operands[0]->type->is_vector() &&
329 ir->operands[1]->type->is_vector()) {
330 assert(ir->operands[0]->type == ir->operands[1]->type);
331 assert(ir->operands[0]->type == ir->type);
336 case ir_binop_greater:
337 case ir_binop_lequal:
338 case ir_binop_gequal:
340 case ir_binop_nequal:
341 /* The semantics of the IR operators differ from the GLSL <, >, <=, >=,
342 * ==, and != operators. The IR operators perform a component-wise
343 * comparison on scalar or vector types and return a boolean scalar or
344 * vector type of the same size.
346 assert(ir->type->base_type == GLSL_TYPE_BOOL);
347 assert(ir->operands[0]->type == ir->operands[1]->type);
348 assert(ir->operands[0]->type->is_vector()
349 || ir->operands[0]->type->is_scalar());
350 assert(ir->operands[0]->type->vector_elements
351 == ir->type->vector_elements);
354 case ir_binop_all_equal:
355 case ir_binop_any_nequal:
356 /* GLSL == and != operate on scalars, vectors, matrices and arrays, and
357 * return a scalar boolean. The IR matches that.
359 assert(ir->type == glsl_type::bool_type);
360 assert(ir->operands[0]->type == ir->operands[1]->type);
363 case ir_binop_lshift:
364 case ir_binop_rshift:
365 assert(ir->operands[0]->type->is_integer() &&
366 ir->operands[1]->type->is_integer());
367 if (ir->operands[0]->type->is_scalar()) {
368 assert(ir->operands[1]->type->is_scalar());
370 if (ir->operands[0]->type->is_vector() &&
371 ir->operands[1]->type->is_vector()) {
372 assert(ir->operands[0]->type->components() ==
373 ir->operands[1]->type->components());
375 assert(ir->type == ir->operands[0]->type);
378 case ir_binop_bit_and:
379 case ir_binop_bit_xor:
380 case ir_binop_bit_or:
381 assert(ir->operands[0]->type->base_type ==
382 ir->operands[1]->type->base_type);
383 assert(ir->type->is_integer());
384 if (ir->operands[0]->type->is_vector() &&
385 ir->operands[1]->type->is_vector()) {
386 assert(ir->operands[0]->type->vector_elements ==
387 ir->operands[1]->type->vector_elements);
391 case ir_binop_logic_and:
392 case ir_binop_logic_xor:
393 case ir_binop_logic_or:
394 assert(ir->type == glsl_type::bool_type);
395 assert(ir->operands[0]->type == glsl_type::bool_type);
396 assert(ir->operands[1]->type == glsl_type::bool_type);
400 assert(ir->type == glsl_type::float_type);
401 assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
402 assert(ir->operands[0]->type->is_vector());
403 assert(ir->operands[0]->type == ir->operands[1]->type);
406 case ir_quadop_vector:
407 /* The vector operator collects some number of scalars and generates a
410 * - All of the operands must be scalar.
411 * - Number of operands must matche the size of the resulting vector.
412 * - Base type of the operands must match the base type of the result.
414 assert(ir->type->is_vector());
415 switch (ir->type->vector_elements) {
417 assert(ir->operands[0]->type->is_scalar());
418 assert(ir->operands[0]->type->base_type == ir->type->base_type);
419 assert(ir->operands[1]->type->is_scalar());
420 assert(ir->operands[1]->type->base_type == ir->type->base_type);
421 assert(ir->operands[2] == NULL);
422 assert(ir->operands[3] == NULL);
425 assert(ir->operands[0]->type->is_scalar());
426 assert(ir->operands[0]->type->base_type == ir->type->base_type);
427 assert(ir->operands[1]->type->is_scalar());
428 assert(ir->operands[1]->type->base_type == ir->type->base_type);
429 assert(ir->operands[2]->type->is_scalar());
430 assert(ir->operands[2]->type->base_type == ir->type->base_type);
431 assert(ir->operands[3] == NULL);
434 assert(ir->operands[0]->type->is_scalar());
435 assert(ir->operands[0]->type->base_type == ir->type->base_type);
436 assert(ir->operands[1]->type->is_scalar());
437 assert(ir->operands[1]->type->base_type == ir->type->base_type);
438 assert(ir->operands[2]->type->is_scalar());
439 assert(ir->operands[2]->type->base_type == ir->type->base_type);
440 assert(ir->operands[3]->type->is_scalar());
441 assert(ir->operands[3]->type->base_type == ir->type->base_type);
444 /* The is_vector assertion above should prevent execution from ever
447 assert(!"Should not get here.");
452 return visit_continue;
456 ir_validate::visit_leave(ir_swizzle *ir)
458 int chans[4] = {ir->mask.x, ir->mask.y, ir->mask.z, ir->mask.w};
460 for (unsigned int i = 0; i < ir->type->vector_elements; i++) {
461 if (chans[i] >= ir->val->type->vector_elements) {
462 printf("ir_swizzle @ %p specifies a channel not present "
463 "in the value.\n", (void *) ir);
469 return visit_continue;
473 ir_validate::visit(ir_variable *ir)
475 /* An ir_variable is the one thing that can (and will) appear multiple times
476 * in an IR tree. It is added to the hashtable so that it can be used
477 * in the ir_dereference_variable handler to ensure that a variable is
478 * declared before it is dereferenced.
481 assert(ralloc_parent(ir->name) == ir);
483 hash_table_insert(ht, ir, ir);
486 /* If a variable is an array, verify that the maximum array index is in
487 * bounds. There was once an error in AST-to-HIR conversion that set this
488 * to be out of bounds.
490 if (ir->type->array_size() > 0) {
491 if (ir->max_array_access >= ir->type->length) {
492 printf("ir_variable has maximum access out of bounds (%d vs %d)\n",
493 ir->max_array_access, ir->type->length - 1);
499 return visit_continue;
503 ir_validate::visit_enter(ir_assignment *ir)
505 const ir_dereference *const lhs = ir->lhs;
506 if (lhs->type->is_scalar() || lhs->type->is_vector()) {
507 if (ir->write_mask == 0) {
508 printf("Assignment LHS is %s, but write mask is 0:\n",
509 lhs->type->is_scalar() ? "scalar" : "vector");
514 int lhs_components = 0;
515 for (int i = 0; i < 4; i++) {
516 if (ir->write_mask & (1 << i))
520 if (lhs_components != ir->rhs->type->vector_elements) {
521 printf("Assignment count of LHS write mask channels enabled not\n"
522 "matching RHS vector size (%d LHS, %d RHS).\n",
523 lhs_components, ir->rhs->type->vector_elements);
529 this->validate_ir(ir, this->data);
531 return visit_continue;
535 ir_validate::visit_enter(ir_call *ir)
537 ir_function_signature *const callee = ir->get_callee();
539 if (callee->ir_type != ir_type_function_signature) {
540 printf("IR called by ir_call is not ir_function_signature!\n");
544 return visit_continue;
548 ir_validate::validate_ir(ir_instruction *ir, void *data)
550 struct hash_table *ht = (struct hash_table *) data;
552 if (hash_table_find(ht, ir)) {
553 printf("Instruction node present twice in ir tree:\n");
558 hash_table_insert(ht, ir, ir);
562 check_node_type(ir_instruction *ir, void *data)
566 if (ir->ir_type <= ir_type_unset || ir->ir_type >= ir_type_max) {
567 printf("Instruction node with unset type\n");
568 ir->print(); printf("\n");
570 assert(ir->type != glsl_type::error_type);
574 validate_ir_tree(exec_list *instructions)
580 foreach_iter(exec_list_iterator, iter, *instructions) {
581 ir_instruction *ir = (ir_instruction *)iter.get();
583 visit_tree(ir, check_node_type, NULL);