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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);
74 static void validate_ir(ir_instruction *ir, void *data);
76 ir_function *current_function;
78 struct hash_table *ht;
83 ir_validate::visit(ir_dereference_variable *ir)
85 if ((ir->var == NULL) || (ir->var->as_variable() == NULL)) {
86 printf("ir_dereference_variable @ %p does not specify a variable %p\n",
87 (void *) ir, (void *) ir->var);
91 if (hash_table_find(ht, ir->var) == NULL) {
92 printf("ir_dereference_variable @ %p specifies undeclared variable "
94 (void *) ir, ir->var->name, (void *) ir->var);
98 this->validate_ir(ir, this->data);
100 return visit_continue;
104 ir_validate::visit(ir_if *ir)
106 if (ir->condition->type != glsl_type::bool_type) {
107 printf("ir_if condition %s type instead of bool.\n",
108 ir->condition->type->name);
114 return visit_continue;
119 ir_validate::visit_leave(ir_loop *ir)
121 if (ir->counter != NULL) {
122 if ((ir->from == NULL) || (ir->from == NULL) || (ir->increment == NULL)) {
123 printf("ir_loop has invalid loop controls:\n"
128 (void *) ir->counter, (void *) ir->from, (void *) ir->to,
129 (void *) ir->increment);
133 if ((ir->cmp < ir_binop_less) || (ir->cmp > ir_binop_nequal)) {
134 printf("ir_loop has invalid comparitor %d\n", ir->cmp);
138 if ((ir->from != NULL) || (ir->from != NULL) || (ir->increment != NULL)) {
139 printf("ir_loop has invalid loop controls:\n"
144 (void *) ir->counter, (void *) ir->from, (void *) ir->to,
145 (void *) ir->increment);
150 return visit_continue;
155 ir_validate::visit_enter(ir_function *ir)
157 /* Function definitions cannot be nested.
159 if (this->current_function != NULL) {
160 printf("Function definition nested inside another function "
162 printf("%s %p inside %s %p\n",
163 ir->name, (void *) ir,
164 this->current_function->name, (void *) this->current_function);
168 /* Store the current function hierarchy being traversed. This is used
169 * by the function signature visitor to ensure that the signatures are
170 * linked with the correct functions.
172 this->current_function = ir;
174 this->validate_ir(ir, this->data);
176 return visit_continue;
180 ir_validate::visit_leave(ir_function *ir)
182 assert(talloc_parent(ir->name) == ir);
184 this->current_function = NULL;
185 return visit_continue;
189 ir_validate::visit_enter(ir_function_signature *ir)
191 if (this->current_function != ir->function()) {
192 printf("Function signature nested inside wrong function "
194 printf("%p inside %s %p instead of %s %p\n",
196 this->current_function->name, (void *) this->current_function,
197 ir->function_name(), (void *) ir->function());
201 this->validate_ir(ir, this->data);
203 return visit_continue;
207 ir_validate::visit_leave(ir_expression *ir)
209 switch (ir->operation) {
210 case ir_unop_bit_not:
211 assert(ir->operands[0]->type == ir->type);
213 case ir_unop_logic_not:
214 assert(ir->type->base_type == GLSL_TYPE_BOOL);
215 assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
224 assert(ir->type == ir->operands[0]->type);
231 assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
232 assert(ir->type == ir->operands[0]->type);
236 assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
237 assert(ir->type->base_type == GLSL_TYPE_INT);
240 assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
241 assert(ir->type->base_type == GLSL_TYPE_FLOAT);
244 assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
245 assert(ir->type->base_type == GLSL_TYPE_BOOL);
248 assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
249 assert(ir->type->base_type == GLSL_TYPE_FLOAT);
252 assert(ir->operands[0]->type->base_type == GLSL_TYPE_INT);
253 assert(ir->type->base_type == GLSL_TYPE_BOOL);
256 assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
257 assert(ir->type->base_type == GLSL_TYPE_INT);
260 assert(ir->operands[0]->type->base_type == GLSL_TYPE_UINT);
261 assert(ir->type->base_type == GLSL_TYPE_FLOAT);
265 assert(ir->operands[0]->type->base_type == GLSL_TYPE_BOOL);
266 assert(ir->type == glsl_type::bool_type);
270 case ir_unop_round_even:
276 case ir_unop_sin_reduced:
277 case ir_unop_cos_reduced:
280 assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
281 assert(ir->operands[0]->type == ir->type);
285 /* XXX what can we assert here? */
296 if (ir->operands[0]->type->is_scalar())
297 assert(ir->operands[1]->type == ir->type);
298 else if (ir->operands[1]->type->is_scalar())
299 assert(ir->operands[0]->type == ir->type);
300 else if (ir->operands[0]->type->is_vector() &&
301 ir->operands[1]->type->is_vector()) {
302 assert(ir->operands[0]->type == ir->operands[1]->type);
303 assert(ir->operands[0]->type == ir->type);
308 case ir_binop_greater:
309 case ir_binop_lequal:
310 case ir_binop_gequal:
312 case ir_binop_nequal:
313 /* The semantics of the IR operators differ from the GLSL <, >, <=, >=,
314 * ==, and != operators. The IR operators perform a component-wise
315 * comparison on scalar or vector types and return a boolean scalar or
316 * vector type of the same size.
318 assert(ir->type->base_type == GLSL_TYPE_BOOL);
319 assert(ir->operands[0]->type == ir->operands[1]->type);
320 assert(ir->operands[0]->type->is_vector()
321 || ir->operands[0]->type->is_scalar());
322 assert(ir->operands[0]->type->vector_elements
323 == ir->type->vector_elements);
326 case ir_binop_all_equal:
327 case ir_binop_any_nequal:
328 /* GLSL == and != operate on scalars, vectors, matrices and arrays, and
329 * return a scalar boolean. The IR matches that.
331 assert(ir->type == glsl_type::bool_type);
332 assert(ir->operands[0]->type == ir->operands[1]->type);
335 case ir_binop_lshift:
336 case ir_binop_rshift:
337 assert(ir->operands[0]->type->is_integer() &&
338 ir->operands[1]->type->is_integer());
339 if (ir->operands[0]->type->is_scalar()) {
340 assert(ir->operands[1]->type->is_scalar());
342 if (ir->operands[0]->type->is_vector() &&
343 ir->operands[1]->type->is_vector()) {
344 assert(ir->operands[0]->type->components() ==
345 ir->operands[1]->type->components());
347 assert(ir->type == ir->operands[0]->type);
350 case ir_binop_bit_and:
351 case ir_binop_bit_xor:
352 case ir_binop_bit_or:
353 assert(ir->operands[0]->type->base_type ==
354 ir->operands[1]->type->base_type);
355 assert(ir->type->is_integer());
356 if (ir->operands[0]->type->is_vector() &&
357 ir->operands[1]->type->is_vector()) {
358 assert(ir->operands[0]->type->vector_elements ==
359 ir->operands[1]->type->vector_elements);
363 case ir_binop_logic_and:
364 case ir_binop_logic_xor:
365 case ir_binop_logic_or:
366 assert(ir->type == glsl_type::bool_type);
367 assert(ir->operands[0]->type == glsl_type::bool_type);
368 assert(ir->operands[1]->type == glsl_type::bool_type);
372 assert(ir->type == glsl_type::float_type);
373 assert(ir->operands[0]->type->base_type == GLSL_TYPE_FLOAT);
374 assert(ir->operands[0]->type->is_vector());
375 assert(ir->operands[0]->type == ir->operands[1]->type);
378 case ir_quadop_vector:
379 /* The vector operator collects some number of scalars and generates a
382 * - All of the operands must be scalar.
383 * - Number of operands must matche the size of the resulting vector.
384 * - Base type of the operands must match the base type of the result.
386 assert(ir->type->is_vector());
387 switch (ir->type->vector_elements) {
389 assert(ir->operands[0]->type->is_scalar());
390 assert(ir->operands[0]->type->base_type == ir->type->base_type);
391 assert(ir->operands[1]->type->is_scalar());
392 assert(ir->operands[1]->type->base_type == ir->type->base_type);
393 assert(ir->operands[2] == NULL);
394 assert(ir->operands[3] == NULL);
397 assert(ir->operands[0]->type->is_scalar());
398 assert(ir->operands[0]->type->base_type == ir->type->base_type);
399 assert(ir->operands[1]->type->is_scalar());
400 assert(ir->operands[1]->type->base_type == ir->type->base_type);
401 assert(ir->operands[2]->type->is_scalar());
402 assert(ir->operands[2]->type->base_type == ir->type->base_type);
403 assert(ir->operands[3] == NULL);
406 assert(ir->operands[0]->type->is_scalar());
407 assert(ir->operands[0]->type->base_type == ir->type->base_type);
408 assert(ir->operands[1]->type->is_scalar());
409 assert(ir->operands[1]->type->base_type == ir->type->base_type);
410 assert(ir->operands[2]->type->is_scalar());
411 assert(ir->operands[2]->type->base_type == ir->type->base_type);
412 assert(ir->operands[3]->type->is_scalar());
413 assert(ir->operands[3]->type->base_type == ir->type->base_type);
416 /* The is_vector assertion above should prevent execution from ever
419 assert(!"Should not get here.");
424 return visit_continue;
428 ir_validate::visit_leave(ir_swizzle *ir)
430 int chans[4] = {ir->mask.x, ir->mask.y, ir->mask.z, ir->mask.w};
432 for (unsigned int i = 0; i < ir->type->vector_elements; i++) {
433 if (chans[i] >= ir->val->type->vector_elements) {
434 printf("ir_swizzle @ %p specifies a channel not present "
435 "in the value.\n", (void *) ir);
441 return visit_continue;
445 ir_validate::visit(ir_variable *ir)
447 /* An ir_variable is the one thing that can (and will) appear multiple times
448 * in an IR tree. It is added to the hashtable so that it can be used
449 * in the ir_dereference_variable handler to ensure that a variable is
450 * declared before it is dereferenced.
453 assert(talloc_parent(ir->name) == ir);
455 hash_table_insert(ht, ir, ir);
456 return visit_continue;
460 ir_validate::visit_enter(ir_assignment *ir)
462 const ir_dereference *const lhs = ir->lhs;
463 if (lhs->type->is_scalar() || lhs->type->is_vector()) {
464 if (ir->write_mask == 0) {
465 printf("Assignment LHS is %s, but write mask is 0:\n",
466 lhs->type->is_scalar() ? "scalar" : "vector");
471 int lhs_components = 0;
472 for (int i = 0; i < 4; i++) {
473 if (ir->write_mask & (1 << i))
477 if (lhs_components != ir->rhs->type->vector_elements) {
478 printf("Assignment count of LHS write mask channels enabled not\n"
479 "matching RHS vector size (%d LHS, %d RHS).\n",
480 lhs_components, ir->rhs->type->vector_elements);
486 this->validate_ir(ir, this->data);
488 return visit_continue;
492 ir_validate::validate_ir(ir_instruction *ir, void *data)
494 struct hash_table *ht = (struct hash_table *) data;
496 if (hash_table_find(ht, ir)) {
497 printf("Instruction node present twice in ir tree:\n");
502 hash_table_insert(ht, ir, ir);
506 check_node_type(ir_instruction *ir, void *data)
510 if (ir->ir_type <= ir_type_unset || ir->ir_type >= ir_type_max) {
511 printf("Instruction node with unset type\n");
512 ir->print(); printf("\n");
514 assert(ir->type != glsl_type::error_type);
518 validate_ir_tree(exec_list *instructions)
524 foreach_iter(exec_list_iterator, iter, *instructions) {
525 ir_instruction *ir = (ir_instruction *)iter.get();
527 visit_tree(ir, check_node_type, NULL);