if (rhs_type->is_error())
return rhs;
- /* FINISHME: For GLSL 1.10, check that the types are not arrays. */
-
/* If the types are identical, the assignment can trivially proceed.
*/
if (rhs_type == lhs_type)
return rhs;
+ /* If the array element types are the same and the size of the LHS is zero,
+ * the assignment is okay.
+ *
+ * Note: Whole-array assignments are not permitted in GLSL 1.10, but this
+ * is handled by ir_dereference::is_lvalue.
+ */
+ if (lhs_type->is_array() && rhs->type->is_array()
+ && (lhs_type->element_type() == rhs->type->element_type())
+ && (lhs_type->array_size() == 0)) {
+ return rhs;
+ }
+
/* FINISHME: Check for and apply automatic conversions. */
return NULL;
}
_mesa_glsl_error(& lhs_loc, state, "type mismatch");
} else {
rhs = new_rhs;
+
+ /* If the LHS array was not declared with a size, it takes it size from
+ * the RHS. If the LHS is an l-value and a whole array, it must be a
+ * dereference of a variable. Any other case would require that the LHS
+ * is either not an l-value or not a whole array.
+ */
+ if (lhs->type->array_size() == 0) {
+ ir_dereference *const d = lhs->as_dereference();
+
+ assert(d != NULL);
+
+ ir_variable *const var = d->var->as_variable();
+
+ assert(var != NULL);
+
+ if (var->max_array_access >= unsigned(rhs->type->array_size())) {
+ /* FINISHME: This should actually log the location of the RHS. */
+ _mesa_glsl_error(& lhs_loc, state, "array size must be > %u due to "
+ "previous access",
+ var->max_array_access);
+ }
+
+ var->type = glsl_type::get_array_instance(lhs->type->element_type(),
+ rhs->type->array_size());
+ }
}
ir_instruction *tmp = new ir_assignment(lhs, rhs, NULL);
error_emitted = true;
break;
- case ast_logic_and:
- case ast_logic_xor:
- case ast_logic_or:
+ case ast_logic_and: {
op[0] = this->subexpressions[0]->hir(instructions, state);
- op[1] = this->subexpressions[1]->hir(instructions, state);
if (!op[0]->type->is_boolean() || !op[0]->type->is_scalar()) {
YYLTYPE loc = this->subexpressions[0]->get_location();
error_emitted = true;
}
- if (!op[1]->type->is_boolean() || !op[1]->type->is_scalar()) {
- YYLTYPE loc = this->subexpressions[1]->get_location();
+ ir_constant *op0_const = op[0]->constant_expression_value();
+ if (op0_const) {
+ if (op0_const->value.b[0]) {
+ op[1] = this->subexpressions[1]->hir(instructions, state);
+
+ if (!op[1]->type->is_boolean() || !op[1]->type->is_scalar()) {
+ YYLTYPE loc = this->subexpressions[1]->get_location();
+
+ _mesa_glsl_error(& loc, state,
+ "RHS of `%s' must be scalar boolean",
+ operator_string(this->oper));
+ error_emitted = true;
+ }
+ result = op[1];
+ } else {
+ result = op0_const;
+ }
+ type = glsl_type::bool_type;
+ } else {
+ ir_if *const stmt = new ir_if(op[0]);
+ instructions->push_tail(stmt);
+
+ op[1] = this->subexpressions[1]->hir(&stmt->then_instructions, state);
+
+ if (!op[1]->type->is_boolean() || !op[1]->type->is_scalar()) {
+ YYLTYPE loc = this->subexpressions[1]->get_location();
+
+ _mesa_glsl_error(& loc, state,
+ "RHS of `%s' must be scalar boolean",
+ operator_string(this->oper));
+ error_emitted = true;
+ }
+
+ ir_variable *const tmp = generate_temporary(glsl_type::bool_type,
+ instructions, state);
+
+ ir_dereference *const then_deref = new ir_dereference(tmp);
+ ir_assignment *const then_assign =
+ new ir_assignment(then_deref, op[1], NULL);
+ stmt->then_instructions.push_tail(then_assign);
+
+ ir_dereference *const else_deref = new ir_dereference(tmp);
+ ir_assignment *const else_assign =
+ new ir_assignment(else_deref, new ir_constant(false), NULL);
+ stmt->else_instructions.push_tail(else_assign);
+
+ result = new ir_dereference(tmp);
+ type = tmp->type;
+ }
+ break;
+ }
+
+ case ast_logic_or: {
+ op[0] = this->subexpressions[0]->hir(instructions, state);
+
+ if (!op[0]->type->is_boolean() || !op[0]->type->is_scalar()) {
+ YYLTYPE loc = this->subexpressions[0]->get_location();
- _mesa_glsl_error(& loc, state, "RHS of `%s' must be scalar boolean",
+ _mesa_glsl_error(& loc, state, "LHS of `%s' must be scalar boolean",
operator_string(this->oper));
error_emitted = true;
}
+ ir_constant *op0_const = op[0]->constant_expression_value();
+ if (op0_const) {
+ if (op0_const->value.b[0]) {
+ result = op0_const;
+ } else {
+ op[1] = this->subexpressions[1]->hir(instructions, state);
+
+ if (!op[1]->type->is_boolean() || !op[1]->type->is_scalar()) {
+ YYLTYPE loc = this->subexpressions[1]->get_location();
+
+ _mesa_glsl_error(& loc, state,
+ "RHS of `%s' must be scalar boolean",
+ operator_string(this->oper));
+ error_emitted = true;
+ }
+ result = op[1];
+ }
+ type = glsl_type::bool_type;
+ } else {
+ ir_if *const stmt = new ir_if(op[0]);
+ instructions->push_tail(stmt);
+
+ ir_variable *const tmp = generate_temporary(glsl_type::bool_type,
+ instructions, state);
+
+ op[1] = this->subexpressions[1]->hir(&stmt->then_instructions, state);
+
+ if (!op[1]->type->is_boolean() || !op[1]->type->is_scalar()) {
+ YYLTYPE loc = this->subexpressions[1]->get_location();
+
+ _mesa_glsl_error(& loc, state, "RHS of `%s' must be scalar boolean",
+ operator_string(this->oper));
+ error_emitted = true;
+ }
+
+ ir_dereference *const then_deref = new ir_dereference(tmp);
+ ir_assignment *const then_assign =
+ new ir_assignment(then_deref, new ir_constant(true), NULL);
+ stmt->then_instructions.push_tail(then_assign);
+
+ ir_dereference *const else_deref = new ir_dereference(tmp);
+ ir_assignment *const else_assign =
+ new ir_assignment(else_deref, op[1], NULL);
+ stmt->else_instructions.push_tail(else_assign);
+
+ result = new ir_dereference(tmp);
+ type = tmp->type;
+ }
+ break;
+ }
+
+ case ast_logic_xor:
+ op[0] = this->subexpressions[0]->hir(instructions, state);
+ op[1] = this->subexpressions[1]->hir(instructions, state);
+
+
result = new ir_expression(operations[this->oper], glsl_type::bool_type,
op[0], op[1]);
type = glsl_type::bool_type;
if (error_emitted)
break;
- /* FINISHME: Handle vectors and matrices accessed with []. */
- if (!array->type->is_array()) {
+ if (!array->type->is_array()
+ && !array->type->is_matrix()
+ && !array->type->is_vector()) {
_mesa_glsl_error(& index_loc, state,
- "cannot dereference non-array");
+ "cannot dereference non-array / non-matrix / "
+ "non-vector");
error_emitted = true;
}
ir_constant *const const_index = op[1]->constant_expression_value();
if (const_index != NULL) {
const int idx = const_index->value.i[0];
+ const char *type_name;
+ unsigned bound = 0;
+
+ if (array->type->is_matrix()) {
+ type_name = "matrix";
+ } else if (array->type->is_vector()) {
+ type_name = "vector";
+ } else {
+ type_name = "array";
+ }
/* From page 24 (page 30 of the PDF) of the GLSL 1.50 spec:
*
* declared size. It is also illegal to index an array with a
* negative constant expression."
*/
- if ((array->type->array_size() > 0)
- && (array->type->array_size() <= idx)) {
- _mesa_glsl_error(& loc, state,
- "array index must be < %u",
- array->type->array_size());
- error_emitted = true;
+ if (array->type->is_matrix()) {
+ if (array->type->row_type()->vector_elements <= idx) {
+ bound = array->type->row_type()->vector_elements;
+ }
+ } else if (array->type->is_vector()) {
+ if (array->type->vector_elements <= idx) {
+ bound = array->type->vector_elements;
+ }
+ } else {
+ if ((array->type->array_size() > 0)
+ && (array->type->array_size() <= idx)) {
+ bound = array->type->array_size();
+ }
}
- if (idx < 0) {
- _mesa_glsl_error(& loc, state,
- "array index must be >= 0");
+ if (bound > 0) {
+ _mesa_glsl_error(& loc, state, "%s index must be < %u",
+ type_name, bound);
+ error_emitted = true;
+ } else if (idx < 0) {
+ _mesa_glsl_error(& loc, state, "%s index must be >= 0",
+ type_name);
error_emitted = true;
}
- ir_variable *const v = array->as_variable();
- if ((v != NULL) && (unsigned(idx) > v->max_array_access))
- v->max_array_access = idx;
+ if (array->type->is_array()) {
+ ir_variable *const v = array->as_variable();
+ if ((v != NULL) && (unsigned(idx) > v->max_array_access))
+ v->max_array_access = idx;
+ }
}
if (error_emitted)
if (qual->centroid)
var->centroid = 1;
- if (qual->attribute && state->target == fragment_shader) {
+ if (qual->attribute && state->target != vertex_shader) {
var->type = glsl_type::error_type;
_mesa_glsl_error(loc, state,
"`attribute' variables may not be declared in the "
- "fragment shader");
+ "%s shader",
+ _mesa_glsl_shader_target_name(state->target));
}
/* From page 25 (page 31 of the PDF) of the GLSL 1.10 spec:
else
var->mode = ir_var_auto;
+ if (qual->uniform)
+ var->shader_in = true;
+ if (qual->varying) {
+ if (qual->in)
+ var->shader_in = true;
+ if (qual->out)
+ var->shader_out = true;
+ }
+
if (qual->flat)
var->interpolation = ir_var_flat;
else if (qual->noperspective)
struct simple_node *ptr;
const struct glsl_type *decl_type;
const char *type_name = NULL;
-
+ ir_rvalue *result = NULL;
/* FINISHME: Handle vertex shader "invariant" declarations that do not
* FINISHME: include a type. These re-declare built-in variables to be
* FINISHME: required or not.
*/
- if (var->type->array_size() <= earlier->max_array_access) {
+ if (var->type->array_size() <= (int)earlier->max_array_access) {
YYLTYPE loc = this->get_location();
_mesa_glsl_error(& loc, state, "array size must be > %u due to "
if ((var->mode == ir_var_in) && (state->current_function == NULL)) {
_mesa_glsl_error(& initializer_loc, state,
"cannot initialize %s shader input / %s",
- (state->target == vertex_shader)
- ? "vertex" : "fragment",
+ _mesa_glsl_shader_target_name(state->target),
(state->target == vertex_shader)
? "attribute" : "varying");
}
* declaration.
*/
if (this->type->qualifier.constant) {
- rhs = rhs->constant_expression_value();
- if (!rhs) {
+ ir_constant *constant_value = rhs->constant_expression_value();
+ if (!constant_value) {
_mesa_glsl_error(& initializer_loc, state,
"initializer of const variable `%s' must be a "
"constant expression",
decl->identifier);
+ } else {
+ rhs = constant_value;
+ var->constant_value = constant_value;
}
}
bool temp = var->read_only;
if (this->type->qualifier.constant)
var->read_only = false;
- (void) do_assignment(instructions, state, lhs, rhs,
- this->get_location());
+ result = do_assignment(instructions, state, lhs, rhs,
+ this->get_location());
var->read_only = temp;
}
}
assert(added_variable);
}
- /* Variable declarations do not have r-values.
+
+ /* Generally, variable declarations do not have r-values. However,
+ * one is used for the declaration in
+ *
+ * while (bool b = some_condition()) {
+ * ...
+ * }
+ *
+ * so we return the rvalue from the last seen declaration here.
*/
- return NULL;
+ return result;
}
exec_list_iterator iter_a = list_a->iterator();
exec_list_iterator iter_b = list_b->iterator();
- while (iter_a.has_next()) {
+ while (iter_a.has_next() && iter_b.has_next()) {
ir_variable *a = (ir_variable *)iter_a.get();
ir_variable *b = (ir_variable *)iter_b.get();
- /* If all of the parameters from the other parameter list have been
- * exhausted, the lists have different length and, by definition,
- * do not match.
- */
- if (!iter_b.has_next())
- return false;
-
/* If the types of the parameters do not match, the parameters lists
* are different.
*/
iter_b.next();
}
+ /* Unless both lists are exhausted, they differ in length and, by
+ * definition, do not match.
+ */
+ if (iter_a.has_next() != iter_b.has_next())
+ return false;
+
return true;
}
exec_list hir_parameters;
- /* The prototype part of a function does not generate anything in the IR
- * instruction stream.
- */
- (void) instructions;
-
/* Convert the list of function parameters to HIR now so that they can be
* used below to compare this function's signature with previously seen
* signatures for functions with the same name.
* definition.
*/
if (parameter_lists_match(& hir_parameters, & sig->parameters)) {
- /* FINISHME: Compare return types. */
+ exec_list_iterator iter_a = hir_parameters.iterator();
+ exec_list_iterator iter_b = sig->parameters.iterator();
+
+ /* check that the qualifiers match. */
+ while (iter_a.has_next()) {
+ ir_variable *a = (ir_variable *)iter_a.get();
+ ir_variable *b = (ir_variable *)iter_b.get();
+
+ if (a->read_only != b->read_only ||
+ a->interpolation != b->interpolation ||
+ a->centroid != b->centroid) {
+ YYLTYPE loc = this->get_location();
+
+ _mesa_glsl_error(& loc, state,
+ "function `%s' parameter `%s' qualifiers "
+ "don't match prototype",
+ name, a->name);
+ }
+
+ iter_a.next();
+ iter_b.next();
+ }
- if (is_definition && (sig->definition != NULL)) {
+ if (sig->return_type != return_type) {
+ YYLTYPE loc = this->get_location();
+
+ _mesa_glsl_error(& loc, state,
+ "function `%s' return type doesn't match "
+ "prototype",
+ name);
+ }
+
+ if (is_definition && sig->is_defined) {
YYLTYPE loc = this->get_location();
_mesa_glsl_error(& loc, state, "function `%s' redefined", name);
} else {
f = new ir_function(name);
state->symbols->add_function(f->name, f);
+
+ /* Emit the new function header */
+ instructions->push_tail(f);
}
/* Verify the return type of main() */
assert(state->current_function == NULL);
state->current_function = signature;
- ir_label *label = new ir_label(signature->function_name());
- if (signature->definition == NULL) {
- signature->definition = label;
- }
- instructions->push_tail(label);
-
/* Duplicate parameters declared in the prototype as concrete variables.
* Add these to the symbol table.
*/
state->symbols->push_scope();
foreach_iter(exec_list_iterator, iter, signature->parameters) {
- ir_variable *const proto = ((ir_instruction *) iter.get())->as_variable();
-
- assert(proto != NULL);
+ ir_variable *const var = ((ir_instruction *) iter.get())->as_variable();
- ir_variable *const var = proto->clone();
-
- instructions->push_tail(var);
+ assert(var != NULL);
/* The only way a parameter would "exist" is if two parameters have
* the same name.
}
}
- /* Convert the body of the function to HIR, and append the resulting
- * instructions to the list that currently consists of the function label
- * and the function parameters.
- */
- this->body->hir(instructions, state);
+ /* Convert the body of the function to HIR. */
+ this->body->hir(&signature->body, state);
+ signature->is_defined = true;
state->symbols->pop_scope();
struct _mesa_glsl_parse_state *state)
{
- if (mode == ast_return) {
+ switch (mode) {
+ case ast_return: {
ir_return *inst;
assert(state->current_function);
_mesa_glsl_error(& loc, state,
"`return` with a value, in function `%s' "
"returning void",
- state->current_function->definition->label);
+ state->current_function->function_name());
}
ir_expression *const ret = (ir_expression *)
_mesa_glsl_error(& loc, state,
"`return' with no value, in function %s returning "
"non-void",
- state->current_function->definition->label);
+ state->current_function->function_name());
}
inst = new ir_return;
}
instructions->push_tail(inst);
+ break;
}
- if (mode == ast_discard) {
+ case ast_discard:
/* FINISHME: discard support */
if (state->target != fragment_shader) {
YYLTYPE loc = this->get_location();
_mesa_glsl_error(& loc, state,
"`discard' may only appear in a fragment shader");
}
+ break;
+
+ case ast_break:
+ case ast_continue:
+ /* FINISHME: Handle switch-statements. They cannot contain 'continue',
+ * FINISHME: and they use a different IR instruction for 'break'.
+ */
+ /* FINISHME: Correctly handle the nesting. If a switch-statement is
+ * FINISHME: inside a loop, a 'continue' is valid and will bind to the
+ * FINISHME: loop.
+ */
+ if (state->loop_or_switch_nesting == NULL) {
+ YYLTYPE loc = this->get_location();
+
+ _mesa_glsl_error(& loc, state,
+ "`%s' may only appear in a loop",
+ (mode == ast_break) ? "break" : "continue");
+ } else {
+ ir_loop *const loop = state->loop_or_switch_nesting->as_loop();
+
+ if (loop != NULL) {
+ ir_loop_jump *const jump =
+ new ir_loop_jump(loop,
+ (mode == ast_break)
+ ? ir_loop_jump::jump_break
+ : ir_loop_jump::jump_continue);
+ instructions->push_tail(jump);
+ }
+ }
+
+ break;
}
/* Jump instructions do not have r-values.
*/
return NULL;
}
+
+
+void
+ast_iteration_statement::condition_to_hir(ir_loop *stmt,
+ struct _mesa_glsl_parse_state *state)
+{
+ if (condition != NULL) {
+ ir_rvalue *const cond =
+ condition->hir(& stmt->body_instructions, state);
+
+ if ((cond == NULL)
+ || !cond->type->is_boolean() || !cond->type->is_scalar()) {
+ YYLTYPE loc = condition->get_location();
+
+ _mesa_glsl_error(& loc, state,
+ "loop condition must be scalar boolean");
+ } else {
+ /* As the first code in the loop body, generate a block that looks
+ * like 'if (!condition) break;' as the loop termination condition.
+ */
+ ir_rvalue *const not_cond =
+ new ir_expression(ir_unop_logic_not, glsl_type::bool_type, cond,
+ NULL);
+
+ ir_if *const if_stmt = new ir_if(not_cond);
+
+ ir_jump *const break_stmt =
+ new ir_loop_jump(stmt, ir_loop_jump::jump_break);
+
+ if_stmt->then_instructions.push_tail(break_stmt);
+ stmt->body_instructions.push_tail(if_stmt);
+ }
+ }
+}
+
+
+ir_rvalue *
+ast_iteration_statement::hir(exec_list *instructions,
+ struct _mesa_glsl_parse_state *state)
+{
+ /* For-loops and while-loops start a new scope, but do-while loops do not.
+ */
+ if (mode != ast_do_while)
+ state->symbols->push_scope();
+
+ if (init_statement != NULL)
+ init_statement->hir(instructions, state);
+
+ ir_loop *const stmt = new ir_loop();
+ instructions->push_tail(stmt);
+
+ /* Track the current loop and / or switch-statement nesting.
+ */
+ ir_instruction *const nesting = state->loop_or_switch_nesting;
+ state->loop_or_switch_nesting = stmt;
+
+ if (mode != ast_do_while)
+ condition_to_hir(stmt, state);
+
+ if (body != NULL) {
+ ast_node *node = (ast_node *) body;
+ do {
+ node->hir(& stmt->body_instructions, state);
+ node = (ast_node *) node->next;
+ } while (node != body);
+ }
+
+ if (rest_expression != NULL)
+ rest_expression->hir(& stmt->body_instructions, state);
+
+ if (mode == ast_do_while)
+ condition_to_hir(stmt, state);
+
+ if (mode != ast_do_while)
+ state->symbols->pop_scope();
+
+ /* Restore previous nesting before returning.
+ */
+ state->loop_or_switch_nesting = nesting;
+
+ /* Loops do not have r-values.
+ */
+ return NULL;
+}
projects / mesa.git / blobdiff