2 * Copyright © 2010 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
24 #include "glsl_symbol_table.h"
26 #include "glsl_types.h"
28 #include "main/core.h" /* for MIN2 */
31 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
);
34 apply_implicit_conversion(const glsl_type
*to
, ir_rvalue
* &from
,
35 struct _mesa_glsl_parse_state
*state
);
38 process_parameters(exec_list
*instructions
, exec_list
*actual_parameters
,
39 exec_list
*parameters
,
40 struct _mesa_glsl_parse_state
*state
)
44 foreach_list_typed(ast_node
, ast
, link
, parameters
) {
45 ir_rvalue
*result
= ast
->hir(instructions
, state
);
47 ir_constant
*const constant
= result
->constant_expression_value();
51 actual_parameters
->push_tail(result
);
60 * Generate a source prototype for a function signature
62 * \param return_type Return type of the function. May be \c NULL.
63 * \param name Name of the function.
64 * \param parameters List of \c ir_instruction nodes representing the
65 * parameter list for the function. This may be either a
66 * formal (\c ir_variable) or actual (\c ir_rvalue)
67 * parameter list. Only the type is used.
70 * A ralloced string representing the prototype of the function.
73 prototype_string(const glsl_type
*return_type
, const char *name
,
74 exec_list
*parameters
)
78 if (return_type
!= NULL
)
79 str
= ralloc_asprintf(NULL
, "%s ", return_type
->name
);
81 ralloc_asprintf_append(&str
, "%s(", name
);
83 const char *comma
= "";
84 foreach_in_list(const ir_variable
, param
, parameters
) {
85 ralloc_asprintf_append(&str
, "%s%s", comma
, param
->type
->name
);
89 ralloc_strcat(&str
, ")");
94 verify_image_parameter(YYLTYPE
*loc
, _mesa_glsl_parse_state
*state
,
95 const ir_variable
*formal
, const ir_variable
*actual
)
98 * From the ARB_shader_image_load_store specification:
100 * "The values of image variables qualified with coherent,
101 * volatile, restrict, readonly, or writeonly may not be passed
102 * to functions whose formal parameters lack such
103 * qualifiers. [...] It is legal to have additional qualifiers
104 * on a formal parameter, but not to have fewer."
106 if (actual
->data
.image_coherent
&& !formal
->data
.image_coherent
) {
107 _mesa_glsl_error(loc
, state
,
108 "function call parameter `%s' drops "
109 "`coherent' qualifier", formal
->name
);
113 if (actual
->data
.image_volatile
&& !formal
->data
.image_volatile
) {
114 _mesa_glsl_error(loc
, state
,
115 "function call parameter `%s' drops "
116 "`volatile' qualifier", formal
->name
);
120 if (actual
->data
.image_restrict
&& !formal
->data
.image_restrict
) {
121 _mesa_glsl_error(loc
, state
,
122 "function call parameter `%s' drops "
123 "`restrict' qualifier", formal
->name
);
127 if (actual
->data
.image_read_only
&& !formal
->data
.image_read_only
) {
128 _mesa_glsl_error(loc
, state
,
129 "function call parameter `%s' drops "
130 "`readonly' qualifier", formal
->name
);
134 if (actual
->data
.image_write_only
&& !formal
->data
.image_write_only
) {
135 _mesa_glsl_error(loc
, state
,
136 "function call parameter `%s' drops "
137 "`writeonly' qualifier", formal
->name
);
145 * Verify that 'out' and 'inout' actual parameters are lvalues. Also, verify
146 * that 'const_in' formal parameters (an extension in our IR) correspond to
147 * ir_constant actual parameters.
150 verify_parameter_modes(_mesa_glsl_parse_state
*state
,
151 ir_function_signature
*sig
,
152 exec_list
&actual_ir_parameters
,
153 exec_list
&actual_ast_parameters
)
155 exec_node
*actual_ir_node
= actual_ir_parameters
.head
;
156 exec_node
*actual_ast_node
= actual_ast_parameters
.head
;
158 foreach_in_list(const ir_variable
, formal
, &sig
->parameters
) {
159 /* The lists must be the same length. */
160 assert(!actual_ir_node
->is_tail_sentinel());
161 assert(!actual_ast_node
->is_tail_sentinel());
163 const ir_rvalue
*const actual
= (ir_rvalue
*) actual_ir_node
;
164 const ast_expression
*const actual_ast
=
165 exec_node_data(ast_expression
, actual_ast_node
, link
);
167 /* FIXME: 'loc' is incorrect (as of 2011-01-21). It is always
170 YYLTYPE loc
= actual_ast
->get_location();
172 /* Verify that 'const_in' parameters are ir_constants. */
173 if (formal
->data
.mode
== ir_var_const_in
&&
174 actual
->ir_type
!= ir_type_constant
) {
175 _mesa_glsl_error(&loc
, state
,
176 "parameter `in %s' must be a constant expression",
181 /* Verify that shader_in parameters are shader inputs */
182 if (formal
->data
.must_be_shader_input
) {
183 ir_variable
*var
= actual
->variable_referenced();
184 if (var
&& var
->data
.mode
!= ir_var_shader_in
) {
185 _mesa_glsl_error(&loc
, state
,
186 "parameter `%s` must be a shader input",
191 if (actual
->ir_type
== ir_type_swizzle
) {
192 _mesa_glsl_error(&loc
, state
,
193 "parameter `%s` must not be swizzled",
199 /* Verify that 'out' and 'inout' actual parameters are lvalues. */
200 if (formal
->data
.mode
== ir_var_function_out
201 || formal
->data
.mode
== ir_var_function_inout
) {
202 const char *mode
= NULL
;
203 switch (formal
->data
.mode
) {
204 case ir_var_function_out
: mode
= "out"; break;
205 case ir_var_function_inout
: mode
= "inout"; break;
206 default: assert(false); break;
209 /* This AST-based check catches errors like f(i++). The IR-based
210 * is_lvalue() is insufficient because the actual parameter at the
211 * IR-level is just a temporary value, which is an l-value.
213 if (actual_ast
->non_lvalue_description
!= NULL
) {
214 _mesa_glsl_error(&loc
, state
,
215 "function parameter '%s %s' references a %s",
217 actual_ast
->non_lvalue_description
);
221 ir_variable
*var
= actual
->variable_referenced();
223 var
->data
.assigned
= true;
225 if (var
&& var
->data
.read_only
) {
226 _mesa_glsl_error(&loc
, state
,
227 "function parameter '%s %s' references the "
228 "read-only variable '%s'",
230 actual
->variable_referenced()->name
);
232 } else if (!actual
->is_lvalue()) {
233 /* Even though ir_binop_vector_extract is not an l-value, let it
234 * slop through. generate_call will handle it correctly.
236 ir_expression
*const expr
= ((ir_rvalue
*) actual
)->as_expression();
238 || expr
->operation
!= ir_binop_vector_extract
239 || !expr
->operands
[0]->is_lvalue()) {
240 _mesa_glsl_error(&loc
, state
,
241 "function parameter '%s %s' is not an lvalue",
248 if (formal
->type
->is_image() &&
249 actual
->variable_referenced()) {
250 if (!verify_image_parameter(&loc
, state
, formal
,
251 actual
->variable_referenced()))
255 actual_ir_node
= actual_ir_node
->next
;
256 actual_ast_node
= actual_ast_node
->next
;
262 fix_parameter(void *mem_ctx
, ir_rvalue
*actual
, const glsl_type
*formal_type
,
263 exec_list
*before_instructions
, exec_list
*after_instructions
,
264 bool parameter_is_inout
)
266 ir_expression
*const expr
= actual
->as_expression();
268 /* If the types match exactly and the parameter is not a vector-extract,
269 * nothing needs to be done to fix the parameter.
271 if (formal_type
== actual
->type
272 && (expr
== NULL
|| expr
->operation
!= ir_binop_vector_extract
))
275 /* To convert an out parameter, we need to create a temporary variable to
276 * hold the value before conversion, and then perform the conversion after
277 * the function call returns.
279 * This has the effect of transforming code like this:
285 * Into IR that's equivalent to this:
289 * int out_parameter_conversion;
290 * f(out_parameter_conversion);
291 * value = float(out_parameter_conversion);
293 * If the parameter is an ir_expression of ir_binop_vector_extract,
294 * additional conversion is needed in the post-call re-write.
297 new(mem_ctx
) ir_variable(formal_type
, "inout_tmp", ir_var_temporary
);
299 before_instructions
->push_tail(tmp
);
301 /* If the parameter is an inout parameter, copy the value of the actual
302 * parameter to the new temporary. Note that no type conversion is allowed
303 * here because inout parameters must match types exactly.
305 if (parameter_is_inout
) {
306 /* Inout parameters should never require conversion, since that would
307 * require an implicit conversion to exist both to and from the formal
308 * parameter type, and there are no bidirectional implicit conversions.
310 assert (actual
->type
== formal_type
);
312 ir_dereference_variable
*const deref_tmp_1
=
313 new(mem_ctx
) ir_dereference_variable(tmp
);
314 ir_assignment
*const assignment
=
315 new(mem_ctx
) ir_assignment(deref_tmp_1
, actual
);
316 before_instructions
->push_tail(assignment
);
319 /* Replace the parameter in the call with a dereference of the new
322 ir_dereference_variable
*const deref_tmp_2
=
323 new(mem_ctx
) ir_dereference_variable(tmp
);
324 actual
->replace_with(deref_tmp_2
);
327 /* Copy the temporary variable to the actual parameter with optional
328 * type conversion applied.
330 ir_rvalue
*rhs
= new(mem_ctx
) ir_dereference_variable(tmp
);
331 if (actual
->type
!= formal_type
)
332 rhs
= convert_component(rhs
, actual
->type
);
334 ir_rvalue
*lhs
= actual
;
335 if (expr
!= NULL
&& expr
->operation
== ir_binop_vector_extract
) {
336 rhs
= new(mem_ctx
) ir_expression(ir_triop_vector_insert
,
337 expr
->operands
[0]->type
,
338 expr
->operands
[0]->clone(mem_ctx
, NULL
),
340 expr
->operands
[1]->clone(mem_ctx
, NULL
));
341 lhs
= expr
->operands
[0]->clone(mem_ctx
, NULL
);
344 ir_assignment
*const assignment_2
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
345 after_instructions
->push_tail(assignment_2
);
349 * Generate a function call.
351 * For non-void functions, this returns a dereference of the temporary variable
352 * which stores the return value for the call. For void functions, this returns
356 generate_call(exec_list
*instructions
, ir_function_signature
*sig
,
357 exec_list
*actual_parameters
,
358 struct _mesa_glsl_parse_state
*state
)
361 exec_list post_call_conversions
;
363 /* Perform implicit conversion of arguments. For out parameters, we need
364 * to place them in a temporary variable and do the conversion after the
365 * call takes place. Since we haven't emitted the call yet, we'll place
366 * the post-call conversions in a temporary exec_list, and emit them later.
368 foreach_two_lists(formal_node
, &sig
->parameters
,
369 actual_node
, actual_parameters
) {
370 ir_rvalue
*actual
= (ir_rvalue
*) actual_node
;
371 ir_variable
*formal
= (ir_variable
*) formal_node
;
373 if (formal
->type
->is_numeric() || formal
->type
->is_boolean()) {
374 switch (formal
->data
.mode
) {
375 case ir_var_const_in
:
376 case ir_var_function_in
: {
378 = convert_component(actual
, formal
->type
);
379 actual
->replace_with(converted
);
382 case ir_var_function_out
:
383 case ir_var_function_inout
:
384 fix_parameter(ctx
, actual
, formal
->type
,
385 instructions
, &post_call_conversions
,
386 formal
->data
.mode
== ir_var_function_inout
);
389 assert (!"Illegal formal parameter mode");
395 /* If the function call is a constant expression, don't generate any
396 * instructions; just generate an ir_constant.
398 * Function calls were first allowed to be constant expressions in GLSL
399 * 1.20 and GLSL ES 3.00.
401 if (state
->is_version(120, 300)) {
402 ir_constant
*value
= sig
->constant_expression_value(actual_parameters
, NULL
);
408 ir_dereference_variable
*deref
= NULL
;
409 if (!sig
->return_type
->is_void()) {
410 /* Create a new temporary to hold the return value. */
411 char *const name
= ir_variable::temporaries_allocate_names
412 ? ralloc_asprintf(ctx
, "%s_retval", sig
->function_name())
417 var
= new(ctx
) ir_variable(sig
->return_type
, name
, ir_var_temporary
);
418 instructions
->push_tail(var
);
422 deref
= new(ctx
) ir_dereference_variable(var
);
424 ir_call
*call
= new(ctx
) ir_call(sig
, deref
, actual_parameters
);
425 instructions
->push_tail(call
);
427 /* Also emit any necessary out-parameter conversions. */
428 instructions
->append_list(&post_call_conversions
);
430 return deref
? deref
->clone(ctx
, NULL
) : NULL
;
434 * Given a function name and parameter list, find the matching signature.
436 static ir_function_signature
*
437 match_function_by_name(const char *name
,
438 exec_list
*actual_parameters
,
439 struct _mesa_glsl_parse_state
*state
)
442 ir_function
*f
= state
->symbols
->get_function(name
);
443 ir_function_signature
*local_sig
= NULL
;
444 ir_function_signature
*sig
= NULL
;
446 /* Is the function hidden by a record type constructor? */
447 if (state
->symbols
->get_type(name
))
448 goto done
; /* no match */
450 /* Is the function hidden by a variable (impossible in 1.10)? */
451 if (!state
->symbols
->separate_function_namespace
452 && state
->symbols
->get_variable(name
))
453 goto done
; /* no match */
456 /* In desktop GL, the presence of a user-defined signature hides any
457 * built-in signatures, so we must ignore them. In contrast, in ES2
458 * user-defined signatures add new overloads, so we must consider them.
460 bool allow_builtins
= state
->es_shader
|| !f
->has_user_signature();
462 /* Look for a match in the local shader. If exact, we're done. */
463 bool is_exact
= false;
464 sig
= local_sig
= f
->matching_signature(state
, actual_parameters
,
465 allow_builtins
, &is_exact
);
473 /* Local shader has no exact candidates; check the built-ins. */
474 _mesa_glsl_initialize_builtin_functions();
475 sig
= _mesa_glsl_find_builtin_function(state
, name
, actual_parameters
);
479 /* If the match is from a linked built-in shader, import the prototype. */
480 if (sig
!= local_sig
) {
482 f
= new(ctx
) ir_function(name
);
483 state
->symbols
->add_global_function(f
);
484 emit_function(state
, f
);
486 f
->add_signature(sig
->clone_prototype(f
, NULL
));
493 print_function_prototypes(_mesa_glsl_parse_state
*state
, YYLTYPE
*loc
,
499 foreach_in_list(ir_function_signature
, sig
, &f
->signatures
) {
500 if (sig
->is_builtin() && !sig
->is_builtin_available(state
))
503 char *str
= prototype_string(sig
->return_type
, f
->name
, &sig
->parameters
);
504 _mesa_glsl_error(loc
, state
, " %s", str
);
510 * Raise a "no matching function" error, listing all possible overloads the
511 * compiler considered so developers can figure out what went wrong.
514 no_matching_function_error(const char *name
,
516 exec_list
*actual_parameters
,
517 _mesa_glsl_parse_state
*state
)
519 gl_shader
*sh
= _mesa_glsl_get_builtin_function_shader();
521 if (state
->symbols
->get_function(name
) == NULL
522 && (!state
->uses_builtin_functions
523 || sh
->symbols
->get_function(name
) == NULL
)) {
524 _mesa_glsl_error(loc
, state
, "no function with name '%s'", name
);
526 char *str
= prototype_string(NULL
, name
, actual_parameters
);
527 _mesa_glsl_error(loc
, state
,
528 "no matching function for call to `%s'; candidates are:",
532 print_function_prototypes(state
, loc
, state
->symbols
->get_function(name
));
534 if (state
->uses_builtin_functions
) {
535 print_function_prototypes(state
, loc
, sh
->symbols
->get_function(name
));
541 * Perform automatic type conversion of constructor parameters
543 * This implements the rules in the "Conversion and Scalar Constructors"
544 * section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
547 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
)
549 void *ctx
= ralloc_parent(src
);
550 const unsigned a
= desired_type
->base_type
;
551 const unsigned b
= src
->type
->base_type
;
552 ir_expression
*result
= NULL
;
554 if (src
->type
->is_error())
557 assert(a
<= GLSL_TYPE_BOOL
);
558 assert(b
<= GLSL_TYPE_BOOL
);
567 result
= new(ctx
) ir_expression(ir_unop_i2u
, src
);
569 case GLSL_TYPE_FLOAT
:
570 result
= new(ctx
) ir_expression(ir_unop_f2u
, src
);
573 result
= new(ctx
) ir_expression(ir_unop_i2u
,
574 new(ctx
) ir_expression(ir_unop_b2i
, src
));
576 case GLSL_TYPE_DOUBLE
:
577 result
= new(ctx
) ir_expression(ir_unop_d2u
, src
);
584 result
= new(ctx
) ir_expression(ir_unop_u2i
, src
);
586 case GLSL_TYPE_FLOAT
:
587 result
= new(ctx
) ir_expression(ir_unop_f2i
, src
);
590 result
= new(ctx
) ir_expression(ir_unop_b2i
, src
);
592 case GLSL_TYPE_DOUBLE
:
593 result
= new(ctx
) ir_expression(ir_unop_d2i
, src
);
597 case GLSL_TYPE_FLOAT
:
600 result
= new(ctx
) ir_expression(ir_unop_u2f
, desired_type
, src
, NULL
);
603 result
= new(ctx
) ir_expression(ir_unop_i2f
, desired_type
, src
, NULL
);
606 result
= new(ctx
) ir_expression(ir_unop_b2f
, desired_type
, src
, NULL
);
608 case GLSL_TYPE_DOUBLE
:
609 result
= new(ctx
) ir_expression(ir_unop_d2f
, desired_type
, src
, NULL
);
616 result
= new(ctx
) ir_expression(ir_unop_i2b
,
617 new(ctx
) ir_expression(ir_unop_u2i
, src
));
620 result
= new(ctx
) ir_expression(ir_unop_i2b
, desired_type
, src
, NULL
);
622 case GLSL_TYPE_FLOAT
:
623 result
= new(ctx
) ir_expression(ir_unop_f2b
, desired_type
, src
, NULL
);
625 case GLSL_TYPE_DOUBLE
:
626 result
= new(ctx
) ir_expression(ir_unop_d2b
, desired_type
, src
, NULL
);
630 case GLSL_TYPE_DOUBLE
:
633 result
= new(ctx
) ir_expression(ir_unop_i2d
, src
);
636 result
= new(ctx
) ir_expression(ir_unop_u2d
, src
);
639 result
= new(ctx
) ir_expression(ir_unop_f2d
,
640 new(ctx
) ir_expression(ir_unop_b2f
, src
));
642 case GLSL_TYPE_FLOAT
:
643 result
= new(ctx
) ir_expression(ir_unop_f2d
, desired_type
, src
, NULL
);
648 assert(result
!= NULL
);
649 assert(result
->type
== desired_type
);
651 /* Try constant folding; it may fold in the conversion we just added. */
652 ir_constant
*const constant
= result
->constant_expression_value();
653 return (constant
!= NULL
) ? (ir_rvalue
*) constant
: (ir_rvalue
*) result
;
657 * Dereference a specific component from a scalar, vector, or matrix
660 dereference_component(ir_rvalue
*src
, unsigned component
)
662 void *ctx
= ralloc_parent(src
);
663 assert(component
< src
->type
->components());
665 /* If the source is a constant, just create a new constant instead of a
666 * dereference of the existing constant.
668 ir_constant
*constant
= src
->as_constant();
670 return new(ctx
) ir_constant(constant
, component
);
672 if (src
->type
->is_scalar()) {
674 } else if (src
->type
->is_vector()) {
675 return new(ctx
) ir_swizzle(src
, component
, 0, 0, 0, 1);
677 assert(src
->type
->is_matrix());
679 /* Dereference a row of the matrix, then call this function again to get
680 * a specific element from that row.
682 const int c
= component
/ src
->type
->column_type()->vector_elements
;
683 const int r
= component
% src
->type
->column_type()->vector_elements
;
684 ir_constant
*const col_index
= new(ctx
) ir_constant(c
);
685 ir_dereference
*const col
= new(ctx
) ir_dereference_array(src
, col_index
);
687 col
->type
= src
->type
->column_type();
689 return dereference_component(col
, r
);
692 assert(!"Should not get here.");
698 process_vec_mat_constructor(exec_list
*instructions
,
699 const glsl_type
*constructor_type
,
700 YYLTYPE
*loc
, exec_list
*parameters
,
701 struct _mesa_glsl_parse_state
*state
)
705 /* The ARB_shading_language_420pack spec says:
707 * "If an initializer is a list of initializers enclosed in curly braces,
708 * the variable being declared must be a vector, a matrix, an array, or a
711 * int i = { 1 }; // illegal, i is not an aggregate"
713 if (constructor_type
->vector_elements
<= 1) {
714 _mesa_glsl_error(loc
, state
, "aggregates can only initialize vectors, "
715 "matrices, arrays, and structs");
716 return ir_rvalue::error_value(ctx
);
719 exec_list actual_parameters
;
720 const unsigned parameter_count
=
721 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
723 if (parameter_count
== 0
724 || (constructor_type
->is_vector() &&
725 constructor_type
->vector_elements
!= parameter_count
)
726 || (constructor_type
->is_matrix() &&
727 constructor_type
->matrix_columns
!= parameter_count
)) {
728 _mesa_glsl_error(loc
, state
, "%s constructor must have %u parameters",
729 constructor_type
->is_vector() ? "vector" : "matrix",
730 constructor_type
->vector_elements
);
731 return ir_rvalue::error_value(ctx
);
734 bool all_parameters_are_constant
= true;
736 /* Type cast each parameter and, if possible, fold constants. */
737 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
738 ir_rvalue
*result
= ir
;
740 /* Apply implicit conversions (not the scalar constructor rules!). See
741 * the spec quote above. */
742 if (constructor_type
->base_type
!= result
->type
->base_type
) {
743 const glsl_type
*desired_type
=
744 glsl_type::get_instance(constructor_type
->base_type
,
745 ir
->type
->vector_elements
,
746 ir
->type
->matrix_columns
);
747 if (result
->type
->can_implicitly_convert_to(desired_type
, state
)) {
748 /* Even though convert_component() implements the constructor
749 * conversion rules (not the implicit conversion rules), its safe
750 * to use it here because we already checked that the implicit
751 * conversion is legal.
753 result
= convert_component(ir
, desired_type
);
757 if (constructor_type
->is_matrix()) {
758 if (result
->type
!= constructor_type
->column_type()) {
759 _mesa_glsl_error(loc
, state
, "type error in matrix constructor: "
760 "expected: %s, found %s",
761 constructor_type
->column_type()->name
,
763 return ir_rvalue::error_value(ctx
);
765 } else if (result
->type
!= constructor_type
->get_scalar_type()) {
766 _mesa_glsl_error(loc
, state
, "type error in vector constructor: "
767 "expected: %s, found %s",
768 constructor_type
->get_scalar_type()->name
,
770 return ir_rvalue::error_value(ctx
);
773 /* Attempt to convert the parameter to a constant valued expression.
774 * After doing so, track whether or not all the parameters to the
775 * constructor are trivially constant valued expressions.
777 ir_rvalue
*const constant
= result
->constant_expression_value();
779 if (constant
!= NULL
)
782 all_parameters_are_constant
= false;
784 ir
->replace_with(result
);
787 if (all_parameters_are_constant
)
788 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
790 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "vec_mat_ctor",
792 instructions
->push_tail(var
);
796 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
797 ir_instruction
*assignment
= NULL
;
799 if (var
->type
->is_matrix()) {
800 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
801 new(ctx
) ir_constant(i
));
802 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
804 /* use writemask rather than index for vector */
805 assert(var
->type
->is_vector());
807 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
808 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, (unsigned)(1 << i
));
811 instructions
->push_tail(assignment
);
816 return new(ctx
) ir_dereference_variable(var
);
821 process_array_constructor(exec_list
*instructions
,
822 const glsl_type
*constructor_type
,
823 YYLTYPE
*loc
, exec_list
*parameters
,
824 struct _mesa_glsl_parse_state
*state
)
827 /* Array constructors come in two forms: sized and unsized. Sized array
828 * constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
829 * variables. In this case the number of parameters must exactly match the
830 * specified size of the array.
832 * Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
833 * are vec4 variables. In this case the size of the array being constructed
834 * is determined by the number of parameters.
836 * From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
838 * "There must be exactly the same number of arguments as the size of
839 * the array being constructed. If no size is present in the
840 * constructor, then the array is explicitly sized to the number of
841 * arguments provided. The arguments are assigned in order, starting at
842 * element 0, to the elements of the constructed array. Each argument
843 * must be the same type as the element type of the array, or be a type
844 * that can be converted to the element type of the array according to
845 * Section 4.1.10 "Implicit Conversions.""
847 exec_list actual_parameters
;
848 const unsigned parameter_count
=
849 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
850 bool is_unsized_array
= constructor_type
->is_unsized_array();
852 if ((parameter_count
== 0) ||
853 (!is_unsized_array
&& (constructor_type
->length
!= parameter_count
))) {
854 const unsigned min_param
= is_unsized_array
855 ? 1 : constructor_type
->length
;
857 _mesa_glsl_error(loc
, state
, "array constructor must have %s %u "
859 is_unsized_array
? "at least" : "exactly",
860 min_param
, (min_param
<= 1) ? "" : "s");
861 return ir_rvalue::error_value(ctx
);
864 if (is_unsized_array
) {
866 glsl_type::get_array_instance(constructor_type
->element_type(),
868 assert(constructor_type
!= NULL
);
869 assert(constructor_type
->length
== parameter_count
);
872 bool all_parameters_are_constant
= true;
874 /* Type cast each parameter and, if possible, fold constants. */
875 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
876 ir_rvalue
*result
= ir
;
878 const glsl_base_type element_base_type
=
879 constructor_type
->element_type()->base_type
;
881 /* Apply implicit conversions (not the scalar constructor rules!). See
882 * the spec quote above. */
883 if (element_base_type
!= result
->type
->base_type
) {
884 const glsl_type
*desired_type
=
885 glsl_type::get_instance(element_base_type
,
886 ir
->type
->vector_elements
,
887 ir
->type
->matrix_columns
);
889 if (result
->type
->can_implicitly_convert_to(desired_type
, state
)) {
890 /* Even though convert_component() implements the constructor
891 * conversion rules (not the implicit conversion rules), its safe
892 * to use it here because we already checked that the implicit
893 * conversion is legal.
895 result
= convert_component(ir
, desired_type
);
899 if (result
->type
!= constructor_type
->element_type()) {
900 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
901 "expected: %s, found %s",
902 constructor_type
->element_type()->name
,
904 return ir_rvalue::error_value(ctx
);
907 /* Attempt to convert the parameter to a constant valued expression.
908 * After doing so, track whether or not all the parameters to the
909 * constructor are trivially constant valued expressions.
911 ir_rvalue
*const constant
= result
->constant_expression_value();
913 if (constant
!= NULL
)
916 all_parameters_are_constant
= false;
918 ir
->replace_with(result
);
921 if (all_parameters_are_constant
)
922 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
924 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "array_ctor",
926 instructions
->push_tail(var
);
929 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
930 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
931 new(ctx
) ir_constant(i
));
933 ir_instruction
*assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
934 instructions
->push_tail(assignment
);
939 return new(ctx
) ir_dereference_variable(var
);
944 * Try to convert a record constructor to a constant expression
947 constant_record_constructor(const glsl_type
*constructor_type
,
948 exec_list
*parameters
, void *mem_ctx
)
950 foreach_in_list(ir_instruction
, node
, parameters
) {
951 ir_constant
*constant
= node
->as_constant();
952 if (constant
== NULL
)
954 node
->replace_with(constant
);
957 return new(mem_ctx
) ir_constant(constructor_type
, parameters
);
962 * Determine if a list consists of a single scalar r-value
965 single_scalar_parameter(exec_list
*parameters
)
967 const ir_rvalue
*const p
= (ir_rvalue
*) parameters
->head
;
968 assert(((ir_rvalue
*)p
)->as_rvalue() != NULL
);
970 return (p
->type
->is_scalar() && p
->next
->is_tail_sentinel());
975 * Generate inline code for a vector constructor
977 * The generated constructor code will consist of a temporary variable
978 * declaration of the same type as the constructor. A sequence of assignments
979 * from constructor parameters to the temporary will follow.
982 * An \c ir_dereference_variable of the temprorary generated in the constructor
986 emit_inline_vector_constructor(const glsl_type
*type
,
987 exec_list
*instructions
,
988 exec_list
*parameters
,
991 assert(!parameters
->is_empty());
993 ir_variable
*var
= new(ctx
) ir_variable(type
, "vec_ctor", ir_var_temporary
);
994 instructions
->push_tail(var
);
996 /* There are two kinds of vector constructors.
998 * - Construct a vector from a single scalar by replicating that scalar to
999 * all components of the vector.
1001 * - Construct a vector from an arbirary combination of vectors and
1002 * scalars. The components of the constructor parameters are assigned
1003 * to the vector in order until the vector is full.
1005 const unsigned lhs_components
= type
->components();
1006 if (single_scalar_parameter(parameters
)) {
1007 ir_rvalue
*first_param
= (ir_rvalue
*)parameters
->head
;
1008 ir_rvalue
*rhs
= new(ctx
) ir_swizzle(first_param
, 0, 0, 0, 0,
1010 ir_dereference_variable
*lhs
= new(ctx
) ir_dereference_variable(var
);
1011 const unsigned mask
= (1U << lhs_components
) - 1;
1013 assert(rhs
->type
== lhs
->type
);
1015 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, mask
);
1016 instructions
->push_tail(inst
);
1018 unsigned base_component
= 0;
1019 unsigned base_lhs_component
= 0;
1020 ir_constant_data data
;
1021 unsigned constant_mask
= 0, constant_components
= 0;
1023 memset(&data
, 0, sizeof(data
));
1025 foreach_in_list(ir_rvalue
, param
, parameters
) {
1026 unsigned rhs_components
= param
->type
->components();
1028 /* Do not try to assign more components to the vector than it has!
1030 if ((rhs_components
+ base_lhs_component
) > lhs_components
) {
1031 rhs_components
= lhs_components
- base_lhs_component
;
1034 const ir_constant
*const c
= param
->as_constant();
1036 for (unsigned i
= 0; i
< rhs_components
; i
++) {
1037 switch (c
->type
->base_type
) {
1038 case GLSL_TYPE_UINT
:
1039 data
.u
[i
+ base_component
] = c
->get_uint_component(i
);
1042 data
.i
[i
+ base_component
] = c
->get_int_component(i
);
1044 case GLSL_TYPE_FLOAT
:
1045 data
.f
[i
+ base_component
] = c
->get_float_component(i
);
1047 case GLSL_TYPE_DOUBLE
:
1048 data
.d
[i
+ base_component
] = c
->get_double_component(i
);
1050 case GLSL_TYPE_BOOL
:
1051 data
.b
[i
+ base_component
] = c
->get_bool_component(i
);
1054 assert(!"Should not get here.");
1059 /* Mask of fields to be written in the assignment.
1061 constant_mask
|= ((1U << rhs_components
) - 1) << base_lhs_component
;
1062 constant_components
+= rhs_components
;
1064 base_component
+= rhs_components
;
1066 /* Advance the component index by the number of components
1067 * that were just assigned.
1069 base_lhs_component
+= rhs_components
;
1072 if (constant_mask
!= 0) {
1073 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1074 const glsl_type
*rhs_type
= glsl_type::get_instance(var
->type
->base_type
,
1075 constant_components
,
1077 ir_rvalue
*rhs
= new(ctx
) ir_constant(rhs_type
, &data
);
1079 ir_instruction
*inst
=
1080 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, constant_mask
);
1081 instructions
->push_tail(inst
);
1085 foreach_in_list(ir_rvalue
, param
, parameters
) {
1086 unsigned rhs_components
= param
->type
->components();
1088 /* Do not try to assign more components to the vector than it has!
1090 if ((rhs_components
+ base_component
) > lhs_components
) {
1091 rhs_components
= lhs_components
- base_component
;
1094 const ir_constant
*const c
= param
->as_constant();
1096 /* Mask of fields to be written in the assignment.
1098 const unsigned write_mask
= ((1U << rhs_components
) - 1)
1101 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1103 /* Generate a swizzle so that LHS and RHS sizes match.
1106 new(ctx
) ir_swizzle(param
, 0, 1, 2, 3, rhs_components
);
1108 ir_instruction
*inst
=
1109 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1110 instructions
->push_tail(inst
);
1113 /* Advance the component index by the number of components that were
1116 base_component
+= rhs_components
;
1119 return new(ctx
) ir_dereference_variable(var
);
1124 * Generate assignment of a portion of a vector to a portion of a matrix column
1126 * \param src_base First component of the source to be used in assignment
1127 * \param column Column of destination to be assiged
1128 * \param row_base First component of the destination column to be assigned
1129 * \param count Number of components to be assigned
1132 * \c src_base + \c count must be less than or equal to the number of components
1133 * in the source vector.
1136 assign_to_matrix_column(ir_variable
*var
, unsigned column
, unsigned row_base
,
1137 ir_rvalue
*src
, unsigned src_base
, unsigned count
,
1140 ir_constant
*col_idx
= new(mem_ctx
) ir_constant(column
);
1141 ir_dereference
*column_ref
= new(mem_ctx
) ir_dereference_array(var
, col_idx
);
1143 assert(column_ref
->type
->components() >= (row_base
+ count
));
1144 assert(src
->type
->components() >= (src_base
+ count
));
1146 /* Generate a swizzle that extracts the number of components from the source
1147 * that are to be assigned to the column of the matrix.
1149 if (count
< src
->type
->vector_elements
) {
1150 src
= new(mem_ctx
) ir_swizzle(src
,
1151 src_base
+ 0, src_base
+ 1,
1152 src_base
+ 2, src_base
+ 3,
1156 /* Mask of fields to be written in the assignment.
1158 const unsigned write_mask
= ((1U << count
) - 1) << row_base
;
1160 return new(mem_ctx
) ir_assignment(column_ref
, src
, NULL
, write_mask
);
1165 * Generate inline code for a matrix constructor
1167 * The generated constructor code will consist of a temporary variable
1168 * declaration of the same type as the constructor. A sequence of assignments
1169 * from constructor parameters to the temporary will follow.
1172 * An \c ir_dereference_variable of the temprorary generated in the constructor
1176 emit_inline_matrix_constructor(const glsl_type
*type
,
1177 exec_list
*instructions
,
1178 exec_list
*parameters
,
1181 assert(!parameters
->is_empty());
1183 ir_variable
*var
= new(ctx
) ir_variable(type
, "mat_ctor", ir_var_temporary
);
1184 instructions
->push_tail(var
);
1186 /* There are three kinds of matrix constructors.
1188 * - Construct a matrix from a single scalar by replicating that scalar to
1189 * along the diagonal of the matrix and setting all other components to
1192 * - Construct a matrix from an arbirary combination of vectors and
1193 * scalars. The components of the constructor parameters are assigned
1194 * to the matrix in column-major order until the matrix is full.
1196 * - Construct a matrix from a single matrix. The source matrix is copied
1197 * to the upper left portion of the constructed matrix, and the remaining
1198 * elements take values from the identity matrix.
1200 ir_rvalue
*const first_param
= (ir_rvalue
*) parameters
->head
;
1201 if (single_scalar_parameter(parameters
)) {
1202 /* Assign the scalar to the X component of a vec4, and fill the remaining
1203 * components with zero.
1205 glsl_base_type param_base_type
= first_param
->type
->base_type
;
1206 assert(param_base_type
== GLSL_TYPE_FLOAT
||
1207 param_base_type
== GLSL_TYPE_DOUBLE
);
1208 ir_variable
*rhs_var
=
1209 new(ctx
) ir_variable(glsl_type::get_instance(param_base_type
, 4, 1),
1212 instructions
->push_tail(rhs_var
);
1214 ir_constant_data zero
;
1215 for (unsigned i
= 0; i
< 4; i
++)
1216 if (param_base_type
== GLSL_TYPE_FLOAT
)
1221 ir_instruction
*inst
=
1222 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(rhs_var
),
1223 new(ctx
) ir_constant(rhs_var
->type
, &zero
),
1225 instructions
->push_tail(inst
);
1227 ir_dereference
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1229 inst
= new(ctx
) ir_assignment(rhs_ref
, first_param
, NULL
, 0x01);
1230 instructions
->push_tail(inst
);
1232 /* Assign the temporary vector to each column of the destination matrix
1233 * with a swizzle that puts the X component on the diagonal of the
1234 * matrix. In some cases this may mean that the X component does not
1235 * get assigned into the column at all (i.e., when the matrix has more
1236 * columns than rows).
1238 static const unsigned rhs_swiz
[4][4] = {
1245 const unsigned cols_to_init
= MIN2(type
->matrix_columns
,
1246 type
->vector_elements
);
1247 for (unsigned i
= 0; i
< cols_to_init
; i
++) {
1248 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1249 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
1251 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1252 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, rhs_swiz
[i
],
1253 type
->vector_elements
);
1255 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
1256 instructions
->push_tail(inst
);
1259 for (unsigned i
= cols_to_init
; i
< type
->matrix_columns
; i
++) {
1260 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1261 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
1263 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1264 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, 1, 1, 1, 1,
1265 type
->vector_elements
);
1267 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
1268 instructions
->push_tail(inst
);
1270 } else if (first_param
->type
->is_matrix()) {
1271 /* From page 50 (56 of the PDF) of the GLSL 1.50 spec:
1273 * "If a matrix is constructed from a matrix, then each component
1274 * (column i, row j) in the result that has a corresponding
1275 * component (column i, row j) in the argument will be initialized
1276 * from there. All other components will be initialized to the
1277 * identity matrix. If a matrix argument is given to a matrix
1278 * constructor, it is an error to have any other arguments."
1280 assert(first_param
->next
->is_tail_sentinel());
1281 ir_rvalue
*const src_matrix
= first_param
;
1283 /* If the source matrix is smaller, pre-initialize the relavent parts of
1284 * the destination matrix to the identity matrix.
1286 if ((src_matrix
->type
->matrix_columns
< var
->type
->matrix_columns
)
1287 || (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)) {
1289 /* If the source matrix has fewer rows, every column of the destination
1290 * must be initialized. Otherwise only the columns in the destination
1291 * that do not exist in the source must be initialized.
1294 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)
1295 ? 0 : src_matrix
->type
->matrix_columns
;
1297 const glsl_type
*const col_type
= var
->type
->column_type();
1298 for (/* empty */; col
< var
->type
->matrix_columns
; col
++) {
1299 ir_constant_data ident
;
1308 ir_rvalue
*const rhs
= new(ctx
) ir_constant(col_type
, &ident
);
1310 ir_rvalue
*const lhs
=
1311 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(col
));
1313 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1314 instructions
->push_tail(inst
);
1318 /* Assign columns from the source matrix to the destination matrix.
1320 * Since the parameter will be used in the RHS of multiple assignments,
1321 * generate a temporary and copy the paramter there.
1323 ir_variable
*const rhs_var
=
1324 new(ctx
) ir_variable(first_param
->type
, "mat_ctor_mat",
1326 instructions
->push_tail(rhs_var
);
1328 ir_dereference
*const rhs_var_ref
=
1329 new(ctx
) ir_dereference_variable(rhs_var
);
1330 ir_instruction
*const inst
=
1331 new(ctx
) ir_assignment(rhs_var_ref
, first_param
, NULL
);
1332 instructions
->push_tail(inst
);
1334 const unsigned last_row
= MIN2(src_matrix
->type
->vector_elements
,
1335 var
->type
->vector_elements
);
1336 const unsigned last_col
= MIN2(src_matrix
->type
->matrix_columns
,
1337 var
->type
->matrix_columns
);
1339 unsigned swiz
[4] = { 0, 0, 0, 0 };
1340 for (unsigned i
= 1; i
< last_row
; i
++)
1343 const unsigned write_mask
= (1U << last_row
) - 1;
1345 for (unsigned i
= 0; i
< last_col
; i
++) {
1346 ir_dereference
*const lhs
=
1347 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1348 ir_rvalue
*const rhs_col
=
1349 new(ctx
) ir_dereference_array(rhs_var
, new(ctx
) ir_constant(i
));
1351 /* If one matrix has columns that are smaller than the columns of the
1352 * other matrix, wrap the column access of the larger with a swizzle
1353 * so that the LHS and RHS of the assignment have the same size (and
1354 * therefore have the same type).
1356 * It would be perfectly valid to unconditionally generate the
1357 * swizzles, this this will typically result in a more compact IR tree.
1360 if (lhs
->type
->vector_elements
!= rhs_col
->type
->vector_elements
) {
1361 rhs
= new(ctx
) ir_swizzle(rhs_col
, swiz
, last_row
);
1366 ir_instruction
*inst
=
1367 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1368 instructions
->push_tail(inst
);
1371 const unsigned cols
= type
->matrix_columns
;
1372 const unsigned rows
= type
->vector_elements
;
1373 unsigned remaining_slots
= rows
* cols
;
1374 unsigned col_idx
= 0;
1375 unsigned row_idx
= 0;
1377 foreach_in_list(ir_rvalue
, rhs
, parameters
) {
1378 unsigned rhs_components
= rhs
->type
->components();
1379 unsigned rhs_base
= 0;
1381 if (remaining_slots
== 0)
1384 /* Since the parameter might be used in the RHS of two assignments,
1385 * generate a temporary and copy the paramter there.
1387 ir_variable
*rhs_var
=
1388 new(ctx
) ir_variable(rhs
->type
, "mat_ctor_vec", ir_var_temporary
);
1389 instructions
->push_tail(rhs_var
);
1391 ir_dereference
*rhs_var_ref
=
1392 new(ctx
) ir_dereference_variable(rhs_var
);
1393 ir_instruction
*inst
= new(ctx
) ir_assignment(rhs_var_ref
, rhs
, NULL
);
1394 instructions
->push_tail(inst
);
1397 /* Assign the current parameter to as many components of the matrix
1400 * NOTE: A single vector parameter can span two matrix columns. A
1401 * single vec4, for example, can completely fill a mat2.
1403 unsigned count
= MIN2(rows
- row_idx
,
1404 rhs_components
- rhs_base
);
1406 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1407 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
1412 instructions
->push_tail(inst
);
1415 remaining_slots
-= count
;
1417 /* Sometimes, there is still data left in the parameters and
1418 * components left to be set in the destination but in other
1421 if (row_idx
>= rows
) {
1425 } while(remaining_slots
> 0 && rhs_base
< rhs_components
);
1429 return new(ctx
) ir_dereference_variable(var
);
1434 emit_inline_record_constructor(const glsl_type
*type
,
1435 exec_list
*instructions
,
1436 exec_list
*parameters
,
1439 ir_variable
*const var
=
1440 new(mem_ctx
) ir_variable(type
, "record_ctor", ir_var_temporary
);
1441 ir_dereference_variable
*const d
= new(mem_ctx
) ir_dereference_variable(var
);
1443 instructions
->push_tail(var
);
1445 exec_node
*node
= parameters
->head
;
1446 for (unsigned i
= 0; i
< type
->length
; i
++) {
1447 assert(!node
->is_tail_sentinel());
1449 ir_dereference
*const lhs
=
1450 new(mem_ctx
) ir_dereference_record(d
->clone(mem_ctx
, NULL
),
1451 type
->fields
.structure
[i
].name
);
1453 ir_rvalue
*const rhs
= ((ir_instruction
*) node
)->as_rvalue();
1454 assert(rhs
!= NULL
);
1456 ir_instruction
*const assign
= new(mem_ctx
) ir_assignment(lhs
, rhs
, NULL
);
1458 instructions
->push_tail(assign
);
1467 process_record_constructor(exec_list
*instructions
,
1468 const glsl_type
*constructor_type
,
1469 YYLTYPE
*loc
, exec_list
*parameters
,
1470 struct _mesa_glsl_parse_state
*state
)
1473 exec_list actual_parameters
;
1475 process_parameters(instructions
, &actual_parameters
,
1478 exec_node
*node
= actual_parameters
.head
;
1479 for (unsigned i
= 0; i
< constructor_type
->length
; i
++) {
1480 ir_rvalue
*ir
= (ir_rvalue
*) node
;
1482 if (node
->is_tail_sentinel()) {
1483 _mesa_glsl_error(loc
, state
,
1484 "insufficient parameters to constructor for `%s'",
1485 constructor_type
->name
);
1486 return ir_rvalue::error_value(ctx
);
1489 if (apply_implicit_conversion(constructor_type
->fields
.structure
[i
].type
,
1491 node
->replace_with(ir
);
1493 _mesa_glsl_error(loc
, state
,
1494 "parameter type mismatch in constructor for `%s.%s' "
1496 constructor_type
->name
,
1497 constructor_type
->fields
.structure
[i
].name
,
1499 constructor_type
->fields
.structure
[i
].type
->name
);
1500 return ir_rvalue::error_value(ctx
);;
1506 if (!node
->is_tail_sentinel()) {
1507 _mesa_glsl_error(loc
, state
, "too many parameters in constructor "
1508 "for `%s'", constructor_type
->name
);
1509 return ir_rvalue::error_value(ctx
);
1512 ir_rvalue
*const constant
=
1513 constant_record_constructor(constructor_type
, &actual_parameters
,
1516 return (constant
!= NULL
)
1518 : emit_inline_record_constructor(constructor_type
, instructions
,
1519 &actual_parameters
, state
);
1524 ast_function_expression::hir(exec_list
*instructions
,
1525 struct _mesa_glsl_parse_state
*state
)
1528 /* There are three sorts of function calls.
1530 * 1. constructors - The first subexpression is an ast_type_specifier.
1531 * 2. methods - Only the .length() method of array types.
1532 * 3. functions - Calls to regular old functions.
1534 * Method calls are actually detected when the ast_field_selection
1535 * expression is handled.
1537 if (is_constructor()) {
1538 const ast_type_specifier
*type
= (ast_type_specifier
*) subexpressions
[0];
1539 YYLTYPE loc
= type
->get_location();
1542 const glsl_type
*const constructor_type
= type
->glsl_type(& name
, state
);
1544 /* constructor_type can be NULL if a variable with the same name as the
1545 * structure has come into scope.
1547 if (constructor_type
== NULL
) {
1548 _mesa_glsl_error(& loc
, state
, "unknown type `%s' (structure name "
1549 "may be shadowed by a variable with the same name)",
1551 return ir_rvalue::error_value(ctx
);
1555 /* Constructors for opaque types are illegal.
1557 if (constructor_type
->contains_opaque()) {
1558 _mesa_glsl_error(& loc
, state
, "cannot construct opaque type `%s'",
1559 constructor_type
->name
);
1560 return ir_rvalue::error_value(ctx
);
1563 if (constructor_type
->is_array()) {
1564 if (!state
->check_version(120, 300, &loc
,
1565 "array constructors forbidden")) {
1566 return ir_rvalue::error_value(ctx
);
1569 return process_array_constructor(instructions
, constructor_type
,
1570 & loc
, &this->expressions
, state
);
1574 /* There are two kinds of constructor calls. Constructors for arrays and
1575 * structures must have the exact number of arguments with matching types
1576 * in the correct order. These constructors follow essentially the same
1577 * type matching rules as functions.
1579 * Constructors for built-in language types, such as mat4 and vec2, are
1580 * free form. The only requirements are that the parameters must provide
1581 * enough values of the correct scalar type and that no arguments are
1582 * given past the last used argument.
1584 * When using the C-style initializer syntax from GLSL 4.20, constructors
1585 * must have the exact number of arguments with matching types in the
1588 if (constructor_type
->is_record()) {
1589 return process_record_constructor(instructions
, constructor_type
,
1590 &loc
, &this->expressions
,
1594 if (!constructor_type
->is_numeric() && !constructor_type
->is_boolean())
1595 return ir_rvalue::error_value(ctx
);
1597 /* Total number of components of the type being constructed. */
1598 const unsigned type_components
= constructor_type
->components();
1600 /* Number of components from parameters that have actually been
1601 * consumed. This is used to perform several kinds of error checking.
1603 unsigned components_used
= 0;
1605 unsigned matrix_parameters
= 0;
1606 unsigned nonmatrix_parameters
= 0;
1607 exec_list actual_parameters
;
1609 foreach_list_typed(ast_node
, ast
, link
, &this->expressions
) {
1610 ir_rvalue
*result
= ast
->hir(instructions
, state
);
1612 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1614 * "It is an error to provide extra arguments beyond this
1615 * last used argument."
1617 if (components_used
>= type_components
) {
1618 _mesa_glsl_error(& loc
, state
, "too many parameters to `%s' "
1620 constructor_type
->name
);
1621 return ir_rvalue::error_value(ctx
);
1624 if (!result
->type
->is_numeric() && !result
->type
->is_boolean()) {
1625 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
1626 "non-numeric data type",
1627 constructor_type
->name
);
1628 return ir_rvalue::error_value(ctx
);
1631 /* Count the number of matrix and nonmatrix parameters. This
1632 * is used below to enforce some of the constructor rules.
1634 if (result
->type
->is_matrix())
1635 matrix_parameters
++;
1637 nonmatrix_parameters
++;
1639 actual_parameters
.push_tail(result
);
1640 components_used
+= result
->type
->components();
1643 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1645 * "It is an error to construct matrices from other matrices. This
1646 * is reserved for future use."
1648 if (matrix_parameters
> 0
1649 && constructor_type
->is_matrix()
1650 && !state
->check_version(120, 100, &loc
,
1651 "cannot construct `%s' from a matrix",
1652 constructor_type
->name
)) {
1653 return ir_rvalue::error_value(ctx
);
1656 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1658 * "If a matrix argument is given to a matrix constructor, it is
1659 * an error to have any other arguments."
1661 if ((matrix_parameters
> 0)
1662 && ((matrix_parameters
+ nonmatrix_parameters
) > 1)
1663 && constructor_type
->is_matrix()) {
1664 _mesa_glsl_error(& loc
, state
, "for matrix `%s' constructor, "
1665 "matrix must be only parameter",
1666 constructor_type
->name
);
1667 return ir_rvalue::error_value(ctx
);
1670 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1672 * "In these cases, there must be enough components provided in the
1673 * arguments to provide an initializer for every component in the
1674 * constructed value."
1676 if (components_used
< type_components
&& components_used
!= 1
1677 && matrix_parameters
== 0) {
1678 _mesa_glsl_error(& loc
, state
, "too few components to construct "
1680 constructor_type
->name
);
1681 return ir_rvalue::error_value(ctx
);
1684 /* Later, we cast each parameter to the same base type as the
1685 * constructor. Since there are no non-floating point matrices, we
1686 * need to break them up into a series of column vectors.
1688 if (constructor_type
->base_type
!= GLSL_TYPE_FLOAT
) {
1689 foreach_in_list_safe(ir_rvalue
, matrix
, &actual_parameters
) {
1690 if (!matrix
->type
->is_matrix())
1693 /* Create a temporary containing the matrix. */
1694 ir_variable
*var
= new(ctx
) ir_variable(matrix
->type
, "matrix_tmp",
1696 instructions
->push_tail(var
);
1697 instructions
->push_tail(new(ctx
) ir_assignment(new(ctx
)
1698 ir_dereference_variable(var
), matrix
, NULL
));
1699 var
->constant_value
= matrix
->constant_expression_value();
1701 /* Replace the matrix with dereferences of its columns. */
1702 for (int i
= 0; i
< matrix
->type
->matrix_columns
; i
++) {
1703 matrix
->insert_before(new (ctx
) ir_dereference_array(var
,
1704 new(ctx
) ir_constant(i
)));
1710 bool all_parameters_are_constant
= true;
1712 /* Type cast each parameter and, if possible, fold constants.*/
1713 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1714 const glsl_type
*desired_type
=
1715 glsl_type::get_instance(constructor_type
->base_type
,
1716 ir
->type
->vector_elements
,
1717 ir
->type
->matrix_columns
);
1718 ir_rvalue
*result
= convert_component(ir
, desired_type
);
1720 /* Attempt to convert the parameter to a constant valued expression.
1721 * After doing so, track whether or not all the parameters to the
1722 * constructor are trivially constant valued expressions.
1724 ir_rvalue
*const constant
= result
->constant_expression_value();
1726 if (constant
!= NULL
)
1729 all_parameters_are_constant
= false;
1732 ir
->replace_with(result
);
1736 /* If all of the parameters are trivially constant, create a
1737 * constant representing the complete collection of parameters.
1739 if (all_parameters_are_constant
) {
1740 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1741 } else if (constructor_type
->is_scalar()) {
1742 return dereference_component((ir_rvalue
*) actual_parameters
.head
,
1744 } else if (constructor_type
->is_vector()) {
1745 return emit_inline_vector_constructor(constructor_type
,
1750 assert(constructor_type
->is_matrix());
1751 return emit_inline_matrix_constructor(constructor_type
,
1757 const ast_expression
*id
= subexpressions
[0];
1758 const char *func_name
= id
->primary_expression
.identifier
;
1759 YYLTYPE loc
= get_location();
1760 exec_list actual_parameters
;
1762 process_parameters(instructions
, &actual_parameters
, &this->expressions
,
1765 ir_function_signature
*sig
=
1766 match_function_by_name(func_name
, &actual_parameters
, state
);
1768 ir_rvalue
*value
= NULL
;
1770 no_matching_function_error(func_name
, &loc
, &actual_parameters
, state
);
1771 value
= ir_rvalue::error_value(ctx
);
1772 } else if (!verify_parameter_modes(state
, sig
, actual_parameters
, this->expressions
)) {
1773 /* an error has already been emitted */
1774 value
= ir_rvalue::error_value(ctx
);
1776 value
= generate_call(instructions
, sig
, &actual_parameters
, state
);
1782 unreachable("not reached");
1786 ast_aggregate_initializer::hir(exec_list
*instructions
,
1787 struct _mesa_glsl_parse_state
*state
)
1790 YYLTYPE loc
= this->get_location();
1792 if (!this->constructor_type
) {
1793 _mesa_glsl_error(&loc
, state
, "type of C-style initializer unknown");
1794 return ir_rvalue::error_value(ctx
);
1796 const glsl_type
*const constructor_type
= this->constructor_type
;
1798 if (!state
->ARB_shading_language_420pack_enable
) {
1799 _mesa_glsl_error(&loc
, state
, "C-style initialization requires the "
1800 "GL_ARB_shading_language_420pack extension");
1801 return ir_rvalue::error_value(ctx
);
1804 if (constructor_type
->is_array()) {
1805 return process_array_constructor(instructions
, constructor_type
, &loc
,
1806 &this->expressions
, state
);
1809 if (constructor_type
->is_record()) {
1810 return process_record_constructor(instructions
, constructor_type
, &loc
,
1811 &this->expressions
, state
);
1814 return process_vec_mat_constructor(instructions
, constructor_type
, &loc
,
1815 &this->expressions
, state
);