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 */
29 #include "main/shaderobj.h"
32 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
);
35 apply_implicit_conversion(const glsl_type
*to
, ir_rvalue
* &from
,
36 struct _mesa_glsl_parse_state
*state
);
39 process_parameters(exec_list
*instructions
, exec_list
*actual_parameters
,
40 exec_list
*parameters
,
41 struct _mesa_glsl_parse_state
*state
)
45 foreach_list_typed(ast_node
, ast
, link
, parameters
) {
46 ir_rvalue
*result
= ast
->hir(instructions
, state
);
48 ir_constant
*const constant
= result
->constant_expression_value();
52 actual_parameters
->push_tail(result
);
61 * Generate a source prototype for a function signature
63 * \param return_type Return type of the function. May be \c NULL.
64 * \param name Name of the function.
65 * \param parameters List of \c ir_instruction nodes representing the
66 * parameter list for the function. This may be either a
67 * formal (\c ir_variable) or actual (\c ir_rvalue)
68 * parameter list. Only the type is used.
71 * A ralloced string representing the prototype of the function.
74 prototype_string(const glsl_type
*return_type
, const char *name
,
75 exec_list
*parameters
)
79 if (return_type
!= NULL
)
80 str
= ralloc_asprintf(NULL
, "%s ", return_type
->name
);
82 ralloc_asprintf_append(&str
, "%s(", name
);
84 const char *comma
= "";
85 foreach_in_list(const ir_variable
, param
, parameters
) {
86 ralloc_asprintf_append(&str
, "%s%s", comma
, param
->type
->name
);
90 ralloc_strcat(&str
, ")");
95 verify_image_parameter(YYLTYPE
*loc
, _mesa_glsl_parse_state
*state
,
96 const ir_variable
*formal
, const ir_variable
*actual
)
99 * From the ARB_shader_image_load_store specification:
101 * "The values of image variables qualified with coherent,
102 * volatile, restrict, readonly, or writeonly may not be passed
103 * to functions whose formal parameters lack such
104 * qualifiers. [...] It is legal to have additional qualifiers
105 * on a formal parameter, but not to have fewer."
107 if (actual
->data
.image_coherent
&& !formal
->data
.image_coherent
) {
108 _mesa_glsl_error(loc
, state
,
109 "function call parameter `%s' drops "
110 "`coherent' qualifier", formal
->name
);
114 if (actual
->data
.image_volatile
&& !formal
->data
.image_volatile
) {
115 _mesa_glsl_error(loc
, state
,
116 "function call parameter `%s' drops "
117 "`volatile' qualifier", formal
->name
);
121 if (actual
->data
.image_restrict
&& !formal
->data
.image_restrict
) {
122 _mesa_glsl_error(loc
, state
,
123 "function call parameter `%s' drops "
124 "`restrict' qualifier", formal
->name
);
128 if (actual
->data
.image_read_only
&& !formal
->data
.image_read_only
) {
129 _mesa_glsl_error(loc
, state
,
130 "function call parameter `%s' drops "
131 "`readonly' qualifier", formal
->name
);
135 if (actual
->data
.image_write_only
&& !formal
->data
.image_write_only
) {
136 _mesa_glsl_error(loc
, state
,
137 "function call parameter `%s' drops "
138 "`writeonly' qualifier", formal
->name
);
146 * Verify that 'out' and 'inout' actual parameters are lvalues. Also, verify
147 * that 'const_in' formal parameters (an extension in our IR) correspond to
148 * ir_constant actual parameters.
151 verify_parameter_modes(_mesa_glsl_parse_state
*state
,
152 ir_function_signature
*sig
,
153 exec_list
&actual_ir_parameters
,
154 exec_list
&actual_ast_parameters
)
156 exec_node
*actual_ir_node
= actual_ir_parameters
.head
;
157 exec_node
*actual_ast_node
= actual_ast_parameters
.head
;
159 foreach_in_list(const ir_variable
, formal
, &sig
->parameters
) {
160 /* The lists must be the same length. */
161 assert(!actual_ir_node
->is_tail_sentinel());
162 assert(!actual_ast_node
->is_tail_sentinel());
164 const ir_rvalue
*const actual
= (ir_rvalue
*) actual_ir_node
;
165 const ast_expression
*const actual_ast
=
166 exec_node_data(ast_expression
, actual_ast_node
, link
);
168 /* FIXME: 'loc' is incorrect (as of 2011-01-21). It is always
171 YYLTYPE loc
= actual_ast
->get_location();
173 /* Verify that 'const_in' parameters are ir_constants. */
174 if (formal
->data
.mode
== ir_var_const_in
&&
175 actual
->ir_type
!= ir_type_constant
) {
176 _mesa_glsl_error(&loc
, state
,
177 "parameter `in %s' must be a constant expression",
182 /* Verify that shader_in parameters are shader inputs */
183 if (formal
->data
.must_be_shader_input
) {
184 ir_variable
*var
= actual
->variable_referenced();
185 if (var
&& var
->data
.mode
!= ir_var_shader_in
) {
186 _mesa_glsl_error(&loc
, state
,
187 "parameter `%s` must be a shader input",
192 if (actual
->ir_type
== ir_type_swizzle
) {
193 _mesa_glsl_error(&loc
, state
,
194 "parameter `%s` must not be swizzled",
200 /* Verify that 'out' and 'inout' actual parameters are lvalues. */
201 if (formal
->data
.mode
== ir_var_function_out
202 || formal
->data
.mode
== ir_var_function_inout
) {
203 const char *mode
= NULL
;
204 switch (formal
->data
.mode
) {
205 case ir_var_function_out
: mode
= "out"; break;
206 case ir_var_function_inout
: mode
= "inout"; break;
207 default: assert(false); break;
210 /* This AST-based check catches errors like f(i++). The IR-based
211 * is_lvalue() is insufficient because the actual parameter at the
212 * IR-level is just a temporary value, which is an l-value.
214 if (actual_ast
->non_lvalue_description
!= NULL
) {
215 _mesa_glsl_error(&loc
, state
,
216 "function parameter '%s %s' references a %s",
218 actual_ast
->non_lvalue_description
);
222 ir_variable
*var
= actual
->variable_referenced();
224 var
->data
.assigned
= true;
226 if (var
&& var
->data
.read_only
) {
227 _mesa_glsl_error(&loc
, state
,
228 "function parameter '%s %s' references the "
229 "read-only variable '%s'",
231 actual
->variable_referenced()->name
);
233 } else if (!actual
->is_lvalue()) {
234 /* Even though ir_binop_vector_extract is not an l-value, let it
235 * slop through. generate_call will handle it correctly.
237 ir_expression
*const expr
= ((ir_rvalue
*) actual
)->as_expression();
239 || expr
->operation
!= ir_binop_vector_extract
240 || !expr
->operands
[0]->is_lvalue()) {
241 _mesa_glsl_error(&loc
, state
,
242 "function parameter '%s %s' is not an lvalue",
249 if (formal
->type
->is_image() &&
250 actual
->variable_referenced()) {
251 if (!verify_image_parameter(&loc
, state
, formal
,
252 actual
->variable_referenced()))
256 actual_ir_node
= actual_ir_node
->next
;
257 actual_ast_node
= actual_ast_node
->next
;
263 fix_parameter(void *mem_ctx
, ir_rvalue
*actual
, const glsl_type
*formal_type
,
264 exec_list
*before_instructions
, exec_list
*after_instructions
,
265 bool parameter_is_inout
)
267 ir_expression
*const expr
= actual
->as_expression();
269 /* If the types match exactly and the parameter is not a vector-extract,
270 * nothing needs to be done to fix the parameter.
272 if (formal_type
== actual
->type
273 && (expr
== NULL
|| expr
->operation
!= ir_binop_vector_extract
))
276 /* To convert an out parameter, we need to create a temporary variable to
277 * hold the value before conversion, and then perform the conversion after
278 * the function call returns.
280 * This has the effect of transforming code like this:
286 * Into IR that's equivalent to this:
290 * int out_parameter_conversion;
291 * f(out_parameter_conversion);
292 * value = float(out_parameter_conversion);
294 * If the parameter is an ir_expression of ir_binop_vector_extract,
295 * additional conversion is needed in the post-call re-write.
298 new(mem_ctx
) ir_variable(formal_type
, "inout_tmp", ir_var_temporary
);
300 before_instructions
->push_tail(tmp
);
302 /* If the parameter is an inout parameter, copy the value of the actual
303 * parameter to the new temporary. Note that no type conversion is allowed
304 * here because inout parameters must match types exactly.
306 if (parameter_is_inout
) {
307 /* Inout parameters should never require conversion, since that would
308 * require an implicit conversion to exist both to and from the formal
309 * parameter type, and there are no bidirectional implicit conversions.
311 assert (actual
->type
== formal_type
);
313 ir_dereference_variable
*const deref_tmp_1
=
314 new(mem_ctx
) ir_dereference_variable(tmp
);
315 ir_assignment
*const assignment
=
316 new(mem_ctx
) ir_assignment(deref_tmp_1
, actual
);
317 before_instructions
->push_tail(assignment
);
320 /* Replace the parameter in the call with a dereference of the new
323 ir_dereference_variable
*const deref_tmp_2
=
324 new(mem_ctx
) ir_dereference_variable(tmp
);
325 actual
->replace_with(deref_tmp_2
);
328 /* Copy the temporary variable to the actual parameter with optional
329 * type conversion applied.
331 ir_rvalue
*rhs
= new(mem_ctx
) ir_dereference_variable(tmp
);
332 if (actual
->type
!= formal_type
)
333 rhs
= convert_component(rhs
, actual
->type
);
335 ir_rvalue
*lhs
= actual
;
336 if (expr
!= NULL
&& expr
->operation
== ir_binop_vector_extract
) {
337 rhs
= new(mem_ctx
) ir_expression(ir_triop_vector_insert
,
338 expr
->operands
[0]->type
,
339 expr
->operands
[0]->clone(mem_ctx
, NULL
),
341 expr
->operands
[1]->clone(mem_ctx
, NULL
));
342 lhs
= expr
->operands
[0]->clone(mem_ctx
, NULL
);
345 ir_assignment
*const assignment_2
= new(mem_ctx
) ir_assignment(lhs
, rhs
);
346 after_instructions
->push_tail(assignment_2
);
350 * Generate a function call.
352 * For non-void functions, this returns a dereference of the temporary variable
353 * which stores the return value for the call. For void functions, this returns
357 generate_call(exec_list
*instructions
, ir_function_signature
*sig
,
358 exec_list
*actual_parameters
,
359 ir_variable
*sub_var
,
360 ir_rvalue
*array_idx
,
361 struct _mesa_glsl_parse_state
*state
)
364 exec_list post_call_conversions
;
366 /* Perform implicit conversion of arguments. For out parameters, we need
367 * to place them in a temporary variable and do the conversion after the
368 * call takes place. Since we haven't emitted the call yet, we'll place
369 * the post-call conversions in a temporary exec_list, and emit them later.
371 foreach_two_lists(formal_node
, &sig
->parameters
,
372 actual_node
, actual_parameters
) {
373 ir_rvalue
*actual
= (ir_rvalue
*) actual_node
;
374 ir_variable
*formal
= (ir_variable
*) formal_node
;
376 if (formal
->type
->is_numeric() || formal
->type
->is_boolean()) {
377 switch (formal
->data
.mode
) {
378 case ir_var_const_in
:
379 case ir_var_function_in
: {
381 = convert_component(actual
, formal
->type
);
382 actual
->replace_with(converted
);
385 case ir_var_function_out
:
386 case ir_var_function_inout
:
387 fix_parameter(ctx
, actual
, formal
->type
,
388 instructions
, &post_call_conversions
,
389 formal
->data
.mode
== ir_var_function_inout
);
392 assert (!"Illegal formal parameter mode");
398 /* If the function call is a constant expression, don't generate any
399 * instructions; just generate an ir_constant.
401 * Function calls were first allowed to be constant expressions in GLSL
402 * 1.20 and GLSL ES 3.00.
404 if (state
->is_version(120, 300)) {
405 ir_constant
*value
= sig
->constant_expression_value(actual_parameters
, NULL
);
411 ir_dereference_variable
*deref
= NULL
;
412 if (!sig
->return_type
->is_void()) {
413 /* Create a new temporary to hold the return value. */
414 char *const name
= ir_variable::temporaries_allocate_names
415 ? ralloc_asprintf(ctx
, "%s_retval", sig
->function_name())
420 var
= new(ctx
) ir_variable(sig
->return_type
, name
, ir_var_temporary
);
421 instructions
->push_tail(var
);
425 deref
= new(ctx
) ir_dereference_variable(var
);
428 ir_call
*call
= new(ctx
) ir_call(sig
, deref
, actual_parameters
, sub_var
, array_idx
);
429 instructions
->push_tail(call
);
431 /* Also emit any necessary out-parameter conversions. */
432 instructions
->append_list(&post_call_conversions
);
434 return deref
? deref
->clone(ctx
, NULL
) : NULL
;
438 * Given a function name and parameter list, find the matching signature.
440 static ir_function_signature
*
441 match_function_by_name(const char *name
,
442 exec_list
*actual_parameters
,
443 struct _mesa_glsl_parse_state
*state
)
446 ir_function
*f
= state
->symbols
->get_function(name
);
447 ir_function_signature
*local_sig
= NULL
;
448 ir_function_signature
*sig
= NULL
;
450 /* Is the function hidden by a record type constructor? */
451 if (state
->symbols
->get_type(name
))
452 goto done
; /* no match */
454 /* Is the function hidden by a variable (impossible in 1.10)? */
455 if (!state
->symbols
->separate_function_namespace
456 && state
->symbols
->get_variable(name
))
457 goto done
; /* no match */
460 /* In desktop GL, the presence of a user-defined signature hides any
461 * built-in signatures, so we must ignore them. In contrast, in ES2
462 * user-defined signatures add new overloads, so we must consider them.
464 bool allow_builtins
= state
->es_shader
|| !f
->has_user_signature();
466 /* Look for a match in the local shader. If exact, we're done. */
467 bool is_exact
= false;
468 sig
= local_sig
= f
->matching_signature(state
, actual_parameters
,
469 allow_builtins
, &is_exact
);
477 /* Local shader has no exact candidates; check the built-ins. */
478 _mesa_glsl_initialize_builtin_functions();
479 sig
= _mesa_glsl_find_builtin_function(state
, name
, actual_parameters
);
483 /* If the match is from a linked built-in shader, import the prototype. */
484 if (sig
!= local_sig
) {
486 f
= new(ctx
) ir_function(name
);
487 state
->symbols
->add_global_function(f
);
488 emit_function(state
, f
);
490 f
->add_signature(sig
->clone_prototype(f
, NULL
));
496 static ir_function_signature
*
497 match_subroutine_by_name(const char *name
,
498 exec_list
*actual_parameters
,
499 struct _mesa_glsl_parse_state
*state
,
503 ir_function_signature
*sig
= NULL
;
504 ir_function
*f
, *found
= NULL
;
505 const char *new_name
;
507 bool is_exact
= false;
509 new_name
= ralloc_asprintf(ctx
, "%s_%s", _mesa_shader_stage_to_subroutine_prefix(state
->stage
), name
);
510 var
= state
->symbols
->get_variable(new_name
);
514 for (int i
= 0; i
< state
->num_subroutine_types
; i
++) {
515 f
= state
->subroutine_types
[i
];
516 if (strcmp(f
->name
, var
->type
->without_array()->name
))
525 sig
= found
->matching_signature(state
, actual_parameters
,
531 print_function_prototypes(_mesa_glsl_parse_state
*state
, YYLTYPE
*loc
,
537 foreach_in_list(ir_function_signature
, sig
, &f
->signatures
) {
538 if (sig
->is_builtin() && !sig
->is_builtin_available(state
))
541 char *str
= prototype_string(sig
->return_type
, f
->name
, &sig
->parameters
);
542 _mesa_glsl_error(loc
, state
, " %s", str
);
548 * Raise a "no matching function" error, listing all possible overloads the
549 * compiler considered so developers can figure out what went wrong.
552 no_matching_function_error(const char *name
,
554 exec_list
*actual_parameters
,
555 _mesa_glsl_parse_state
*state
)
557 gl_shader
*sh
= _mesa_glsl_get_builtin_function_shader();
559 if (state
->symbols
->get_function(name
) == NULL
560 && (!state
->uses_builtin_functions
561 || sh
->symbols
->get_function(name
) == NULL
)) {
562 _mesa_glsl_error(loc
, state
, "no function with name '%s'", name
);
564 char *str
= prototype_string(NULL
, name
, actual_parameters
);
565 _mesa_glsl_error(loc
, state
,
566 "no matching function for call to `%s'; candidates are:",
570 print_function_prototypes(state
, loc
, state
->symbols
->get_function(name
));
572 if (state
->uses_builtin_functions
) {
573 print_function_prototypes(state
, loc
, sh
->symbols
->get_function(name
));
579 * Perform automatic type conversion of constructor parameters
581 * This implements the rules in the "Conversion and Scalar Constructors"
582 * section (GLSL 1.10 section 5.4.1), not the "Implicit Conversions" rules.
585 convert_component(ir_rvalue
*src
, const glsl_type
*desired_type
)
587 void *ctx
= ralloc_parent(src
);
588 const unsigned a
= desired_type
->base_type
;
589 const unsigned b
= src
->type
->base_type
;
590 ir_expression
*result
= NULL
;
592 if (src
->type
->is_error())
595 assert(a
<= GLSL_TYPE_BOOL
);
596 assert(b
<= GLSL_TYPE_BOOL
);
605 result
= new(ctx
) ir_expression(ir_unop_i2u
, src
);
607 case GLSL_TYPE_FLOAT
:
608 result
= new(ctx
) ir_expression(ir_unop_f2u
, src
);
611 result
= new(ctx
) ir_expression(ir_unop_i2u
,
612 new(ctx
) ir_expression(ir_unop_b2i
, src
));
614 case GLSL_TYPE_DOUBLE
:
615 result
= new(ctx
) ir_expression(ir_unop_d2u
, src
);
622 result
= new(ctx
) ir_expression(ir_unop_u2i
, src
);
624 case GLSL_TYPE_FLOAT
:
625 result
= new(ctx
) ir_expression(ir_unop_f2i
, src
);
628 result
= new(ctx
) ir_expression(ir_unop_b2i
, src
);
630 case GLSL_TYPE_DOUBLE
:
631 result
= new(ctx
) ir_expression(ir_unop_d2i
, src
);
635 case GLSL_TYPE_FLOAT
:
638 result
= new(ctx
) ir_expression(ir_unop_u2f
, desired_type
, src
, NULL
);
641 result
= new(ctx
) ir_expression(ir_unop_i2f
, desired_type
, src
, NULL
);
644 result
= new(ctx
) ir_expression(ir_unop_b2f
, desired_type
, src
, NULL
);
646 case GLSL_TYPE_DOUBLE
:
647 result
= new(ctx
) ir_expression(ir_unop_d2f
, desired_type
, src
, NULL
);
654 result
= new(ctx
) ir_expression(ir_unop_i2b
,
655 new(ctx
) ir_expression(ir_unop_u2i
, src
));
658 result
= new(ctx
) ir_expression(ir_unop_i2b
, desired_type
, src
, NULL
);
660 case GLSL_TYPE_FLOAT
:
661 result
= new(ctx
) ir_expression(ir_unop_f2b
, desired_type
, src
, NULL
);
663 case GLSL_TYPE_DOUBLE
:
664 result
= new(ctx
) ir_expression(ir_unop_d2b
, desired_type
, src
, NULL
);
668 case GLSL_TYPE_DOUBLE
:
671 result
= new(ctx
) ir_expression(ir_unop_i2d
, src
);
674 result
= new(ctx
) ir_expression(ir_unop_u2d
, src
);
677 result
= new(ctx
) ir_expression(ir_unop_f2d
,
678 new(ctx
) ir_expression(ir_unop_b2f
, src
));
680 case GLSL_TYPE_FLOAT
:
681 result
= new(ctx
) ir_expression(ir_unop_f2d
, desired_type
, src
, NULL
);
686 assert(result
!= NULL
);
687 assert(result
->type
== desired_type
);
689 /* Try constant folding; it may fold in the conversion we just added. */
690 ir_constant
*const constant
= result
->constant_expression_value();
691 return (constant
!= NULL
) ? (ir_rvalue
*) constant
: (ir_rvalue
*) result
;
695 * Dereference a specific component from a scalar, vector, or matrix
698 dereference_component(ir_rvalue
*src
, unsigned component
)
700 void *ctx
= ralloc_parent(src
);
701 assert(component
< src
->type
->components());
703 /* If the source is a constant, just create a new constant instead of a
704 * dereference of the existing constant.
706 ir_constant
*constant
= src
->as_constant();
708 return new(ctx
) ir_constant(constant
, component
);
710 if (src
->type
->is_scalar()) {
712 } else if (src
->type
->is_vector()) {
713 return new(ctx
) ir_swizzle(src
, component
, 0, 0, 0, 1);
715 assert(src
->type
->is_matrix());
717 /* Dereference a row of the matrix, then call this function again to get
718 * a specific element from that row.
720 const int c
= component
/ src
->type
->column_type()->vector_elements
;
721 const int r
= component
% src
->type
->column_type()->vector_elements
;
722 ir_constant
*const col_index
= new(ctx
) ir_constant(c
);
723 ir_dereference
*const col
= new(ctx
) ir_dereference_array(src
, col_index
);
725 col
->type
= src
->type
->column_type();
727 return dereference_component(col
, r
);
730 assert(!"Should not get here.");
736 process_vec_mat_constructor(exec_list
*instructions
,
737 const glsl_type
*constructor_type
,
738 YYLTYPE
*loc
, exec_list
*parameters
,
739 struct _mesa_glsl_parse_state
*state
)
743 /* The ARB_shading_language_420pack spec says:
745 * "If an initializer is a list of initializers enclosed in curly braces,
746 * the variable being declared must be a vector, a matrix, an array, or a
749 * int i = { 1 }; // illegal, i is not an aggregate"
751 if (constructor_type
->vector_elements
<= 1) {
752 _mesa_glsl_error(loc
, state
, "aggregates can only initialize vectors, "
753 "matrices, arrays, and structs");
754 return ir_rvalue::error_value(ctx
);
757 exec_list actual_parameters
;
758 const unsigned parameter_count
=
759 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
761 if (parameter_count
== 0
762 || (constructor_type
->is_vector() &&
763 constructor_type
->vector_elements
!= parameter_count
)
764 || (constructor_type
->is_matrix() &&
765 constructor_type
->matrix_columns
!= parameter_count
)) {
766 _mesa_glsl_error(loc
, state
, "%s constructor must have %u parameters",
767 constructor_type
->is_vector() ? "vector" : "matrix",
768 constructor_type
->vector_elements
);
769 return ir_rvalue::error_value(ctx
);
772 bool all_parameters_are_constant
= true;
774 /* Type cast each parameter and, if possible, fold constants. */
775 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
776 ir_rvalue
*result
= ir
;
778 /* Apply implicit conversions (not the scalar constructor rules!). See
779 * the spec quote above. */
780 if (constructor_type
->base_type
!= result
->type
->base_type
) {
781 const glsl_type
*desired_type
=
782 glsl_type::get_instance(constructor_type
->base_type
,
783 ir
->type
->vector_elements
,
784 ir
->type
->matrix_columns
);
785 if (result
->type
->can_implicitly_convert_to(desired_type
, state
)) {
786 /* Even though convert_component() implements the constructor
787 * conversion rules (not the implicit conversion rules), its safe
788 * to use it here because we already checked that the implicit
789 * conversion is legal.
791 result
= convert_component(ir
, desired_type
);
795 if (constructor_type
->is_matrix()) {
796 if (result
->type
!= constructor_type
->column_type()) {
797 _mesa_glsl_error(loc
, state
, "type error in matrix constructor: "
798 "expected: %s, found %s",
799 constructor_type
->column_type()->name
,
801 return ir_rvalue::error_value(ctx
);
803 } else if (result
->type
!= constructor_type
->get_scalar_type()) {
804 _mesa_glsl_error(loc
, state
, "type error in vector constructor: "
805 "expected: %s, found %s",
806 constructor_type
->get_scalar_type()->name
,
808 return ir_rvalue::error_value(ctx
);
811 /* Attempt to convert the parameter to a constant valued expression.
812 * After doing so, track whether or not all the parameters to the
813 * constructor are trivially constant valued expressions.
815 ir_rvalue
*const constant
= result
->constant_expression_value();
817 if (constant
!= NULL
)
820 all_parameters_are_constant
= false;
822 ir
->replace_with(result
);
825 if (all_parameters_are_constant
)
826 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
828 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "vec_mat_ctor",
830 instructions
->push_tail(var
);
834 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
835 ir_instruction
*assignment
= NULL
;
837 if (var
->type
->is_matrix()) {
838 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
839 new(ctx
) ir_constant(i
));
840 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
842 /* use writemask rather than index for vector */
843 assert(var
->type
->is_vector());
845 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
846 assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, (unsigned)(1 << i
));
849 instructions
->push_tail(assignment
);
854 return new(ctx
) ir_dereference_variable(var
);
859 process_array_constructor(exec_list
*instructions
,
860 const glsl_type
*constructor_type
,
861 YYLTYPE
*loc
, exec_list
*parameters
,
862 struct _mesa_glsl_parse_state
*state
)
865 /* Array constructors come in two forms: sized and unsized. Sized array
866 * constructors look like 'vec4[2](a, b)', where 'a' and 'b' are vec4
867 * variables. In this case the number of parameters must exactly match the
868 * specified size of the array.
870 * Unsized array constructors look like 'vec4[](a, b)', where 'a' and 'b'
871 * are vec4 variables. In this case the size of the array being constructed
872 * is determined by the number of parameters.
874 * From page 52 (page 58 of the PDF) of the GLSL 1.50 spec:
876 * "There must be exactly the same number of arguments as the size of
877 * the array being constructed. If no size is present in the
878 * constructor, then the array is explicitly sized to the number of
879 * arguments provided. The arguments are assigned in order, starting at
880 * element 0, to the elements of the constructed array. Each argument
881 * must be the same type as the element type of the array, or be a type
882 * that can be converted to the element type of the array according to
883 * Section 4.1.10 "Implicit Conversions.""
885 exec_list actual_parameters
;
886 const unsigned parameter_count
=
887 process_parameters(instructions
, &actual_parameters
, parameters
, state
);
888 bool is_unsized_array
= constructor_type
->is_unsized_array();
890 if ((parameter_count
== 0) ||
891 (!is_unsized_array
&& (constructor_type
->length
!= parameter_count
))) {
892 const unsigned min_param
= is_unsized_array
893 ? 1 : constructor_type
->length
;
895 _mesa_glsl_error(loc
, state
, "array constructor must have %s %u "
897 is_unsized_array
? "at least" : "exactly",
898 min_param
, (min_param
<= 1) ? "" : "s");
899 return ir_rvalue::error_value(ctx
);
902 if (is_unsized_array
) {
904 glsl_type::get_array_instance(constructor_type
->fields
.array
,
906 assert(constructor_type
!= NULL
);
907 assert(constructor_type
->length
== parameter_count
);
910 bool all_parameters_are_constant
= true;
912 /* Type cast each parameter and, if possible, fold constants. */
913 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
914 ir_rvalue
*result
= ir
;
916 const glsl_base_type element_base_type
=
917 constructor_type
->fields
.array
->base_type
;
919 /* Apply implicit conversions (not the scalar constructor rules!). See
920 * the spec quote above. */
921 if (element_base_type
!= result
->type
->base_type
) {
922 const glsl_type
*desired_type
=
923 glsl_type::get_instance(element_base_type
,
924 ir
->type
->vector_elements
,
925 ir
->type
->matrix_columns
);
927 if (result
->type
->can_implicitly_convert_to(desired_type
, state
)) {
928 /* Even though convert_component() implements the constructor
929 * conversion rules (not the implicit conversion rules), its safe
930 * to use it here because we already checked that the implicit
931 * conversion is legal.
933 result
= convert_component(ir
, desired_type
);
937 if (result
->type
!= constructor_type
->fields
.array
) {
938 _mesa_glsl_error(loc
, state
, "type error in array constructor: "
939 "expected: %s, found %s",
940 constructor_type
->fields
.array
->name
,
942 return ir_rvalue::error_value(ctx
);
945 /* Attempt to convert the parameter to a constant valued expression.
946 * After doing so, track whether or not all the parameters to the
947 * constructor are trivially constant valued expressions.
949 ir_rvalue
*const constant
= result
->constant_expression_value();
951 if (constant
!= NULL
)
954 all_parameters_are_constant
= false;
956 ir
->replace_with(result
);
959 if (all_parameters_are_constant
)
960 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
962 ir_variable
*var
= new(ctx
) ir_variable(constructor_type
, "array_ctor",
964 instructions
->push_tail(var
);
967 foreach_in_list(ir_rvalue
, rhs
, &actual_parameters
) {
968 ir_rvalue
*lhs
= new(ctx
) ir_dereference_array(var
,
969 new(ctx
) ir_constant(i
));
971 ir_instruction
*assignment
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
972 instructions
->push_tail(assignment
);
977 return new(ctx
) ir_dereference_variable(var
);
982 * Try to convert a record constructor to a constant expression
985 constant_record_constructor(const glsl_type
*constructor_type
,
986 exec_list
*parameters
, void *mem_ctx
)
988 foreach_in_list(ir_instruction
, node
, parameters
) {
989 ir_constant
*constant
= node
->as_constant();
990 if (constant
== NULL
)
992 node
->replace_with(constant
);
995 return new(mem_ctx
) ir_constant(constructor_type
, parameters
);
1000 * Determine if a list consists of a single scalar r-value
1003 single_scalar_parameter(exec_list
*parameters
)
1005 const ir_rvalue
*const p
= (ir_rvalue
*) parameters
->head
;
1006 assert(((ir_rvalue
*)p
)->as_rvalue() != NULL
);
1008 return (p
->type
->is_scalar() && p
->next
->is_tail_sentinel());
1013 * Generate inline code for a vector constructor
1015 * The generated constructor code will consist of a temporary variable
1016 * declaration of the same type as the constructor. A sequence of assignments
1017 * from constructor parameters to the temporary will follow.
1020 * An \c ir_dereference_variable of the temprorary generated in the constructor
1024 emit_inline_vector_constructor(const glsl_type
*type
,
1025 exec_list
*instructions
,
1026 exec_list
*parameters
,
1029 assert(!parameters
->is_empty());
1031 ir_variable
*var
= new(ctx
) ir_variable(type
, "vec_ctor", ir_var_temporary
);
1032 instructions
->push_tail(var
);
1034 /* There are three kinds of vector constructors.
1036 * - Construct a vector from a single scalar by replicating that scalar to
1037 * all components of the vector.
1039 * - Construct a vector from at least a matrix. This case should already
1040 * have been taken care of in ast_function_expression::hir by breaking
1041 * down the matrix into a series of column vectors.
1043 * - Construct a vector from an arbirary combination of vectors and
1044 * scalars. The components of the constructor parameters are assigned
1045 * to the vector in order until the vector is full.
1047 const unsigned lhs_components
= type
->components();
1048 if (single_scalar_parameter(parameters
)) {
1049 ir_rvalue
*first_param
= (ir_rvalue
*)parameters
->head
;
1050 ir_rvalue
*rhs
= new(ctx
) ir_swizzle(first_param
, 0, 0, 0, 0,
1052 ir_dereference_variable
*lhs
= new(ctx
) ir_dereference_variable(var
);
1053 const unsigned mask
= (1U << lhs_components
) - 1;
1055 assert(rhs
->type
== lhs
->type
);
1057 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
, mask
);
1058 instructions
->push_tail(inst
);
1060 unsigned base_component
= 0;
1061 unsigned base_lhs_component
= 0;
1062 ir_constant_data data
;
1063 unsigned constant_mask
= 0, constant_components
= 0;
1065 memset(&data
, 0, sizeof(data
));
1067 foreach_in_list(ir_rvalue
, param
, parameters
) {
1068 unsigned rhs_components
= param
->type
->components();
1070 /* Do not try to assign more components to the vector than it has!
1072 if ((rhs_components
+ base_lhs_component
) > lhs_components
) {
1073 rhs_components
= lhs_components
- base_lhs_component
;
1076 const ir_constant
*const c
= param
->as_constant();
1078 for (unsigned i
= 0; i
< rhs_components
; i
++) {
1079 switch (c
->type
->base_type
) {
1080 case GLSL_TYPE_UINT
:
1081 data
.u
[i
+ base_component
] = c
->get_uint_component(i
);
1084 data
.i
[i
+ base_component
] = c
->get_int_component(i
);
1086 case GLSL_TYPE_FLOAT
:
1087 data
.f
[i
+ base_component
] = c
->get_float_component(i
);
1089 case GLSL_TYPE_DOUBLE
:
1090 data
.d
[i
+ base_component
] = c
->get_double_component(i
);
1092 case GLSL_TYPE_BOOL
:
1093 data
.b
[i
+ base_component
] = c
->get_bool_component(i
);
1096 assert(!"Should not get here.");
1101 /* Mask of fields to be written in the assignment.
1103 constant_mask
|= ((1U << rhs_components
) - 1) << base_lhs_component
;
1104 constant_components
+= rhs_components
;
1106 base_component
+= rhs_components
;
1108 /* Advance the component index by the number of components
1109 * that were just assigned.
1111 base_lhs_component
+= rhs_components
;
1114 if (constant_mask
!= 0) {
1115 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1116 const glsl_type
*rhs_type
= glsl_type::get_instance(var
->type
->base_type
,
1117 constant_components
,
1119 ir_rvalue
*rhs
= new(ctx
) ir_constant(rhs_type
, &data
);
1121 ir_instruction
*inst
=
1122 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, constant_mask
);
1123 instructions
->push_tail(inst
);
1127 foreach_in_list(ir_rvalue
, param
, parameters
) {
1128 unsigned rhs_components
= param
->type
->components();
1130 /* Do not try to assign more components to the vector than it has!
1132 if ((rhs_components
+ base_component
) > lhs_components
) {
1133 rhs_components
= lhs_components
- base_component
;
1136 /* If we do not have any components left to copy, break out of the
1137 * loop. This can happen when initializing a vec4 with a mat3 as the
1138 * mat3 would have been broken into a series of column vectors.
1140 if (rhs_components
== 0) {
1144 const ir_constant
*const c
= param
->as_constant();
1146 /* Mask of fields to be written in the assignment.
1148 const unsigned write_mask
= ((1U << rhs_components
) - 1)
1151 ir_dereference
*lhs
= new(ctx
) ir_dereference_variable(var
);
1153 /* Generate a swizzle so that LHS and RHS sizes match.
1156 new(ctx
) ir_swizzle(param
, 0, 1, 2, 3, rhs_components
);
1158 ir_instruction
*inst
=
1159 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1160 instructions
->push_tail(inst
);
1163 /* Advance the component index by the number of components that were
1166 base_component
+= rhs_components
;
1169 return new(ctx
) ir_dereference_variable(var
);
1174 * Generate assignment of a portion of a vector to a portion of a matrix column
1176 * \param src_base First component of the source to be used in assignment
1177 * \param column Column of destination to be assiged
1178 * \param row_base First component of the destination column to be assigned
1179 * \param count Number of components to be assigned
1182 * \c src_base + \c count must be less than or equal to the number of components
1183 * in the source vector.
1186 assign_to_matrix_column(ir_variable
*var
, unsigned column
, unsigned row_base
,
1187 ir_rvalue
*src
, unsigned src_base
, unsigned count
,
1190 ir_constant
*col_idx
= new(mem_ctx
) ir_constant(column
);
1191 ir_dereference
*column_ref
= new(mem_ctx
) ir_dereference_array(var
, col_idx
);
1193 assert(column_ref
->type
->components() >= (row_base
+ count
));
1194 assert(src
->type
->components() >= (src_base
+ count
));
1196 /* Generate a swizzle that extracts the number of components from the source
1197 * that are to be assigned to the column of the matrix.
1199 if (count
< src
->type
->vector_elements
) {
1200 src
= new(mem_ctx
) ir_swizzle(src
,
1201 src_base
+ 0, src_base
+ 1,
1202 src_base
+ 2, src_base
+ 3,
1206 /* Mask of fields to be written in the assignment.
1208 const unsigned write_mask
= ((1U << count
) - 1) << row_base
;
1210 return new(mem_ctx
) ir_assignment(column_ref
, src
, NULL
, write_mask
);
1215 * Generate inline code for a matrix constructor
1217 * The generated constructor code will consist of a temporary variable
1218 * declaration of the same type as the constructor. A sequence of assignments
1219 * from constructor parameters to the temporary will follow.
1222 * An \c ir_dereference_variable of the temprorary generated in the constructor
1226 emit_inline_matrix_constructor(const glsl_type
*type
,
1227 exec_list
*instructions
,
1228 exec_list
*parameters
,
1231 assert(!parameters
->is_empty());
1233 ir_variable
*var
= new(ctx
) ir_variable(type
, "mat_ctor", ir_var_temporary
);
1234 instructions
->push_tail(var
);
1236 /* There are three kinds of matrix constructors.
1238 * - Construct a matrix from a single scalar by replicating that scalar to
1239 * along the diagonal of the matrix and setting all other components to
1242 * - Construct a matrix from an arbirary combination of vectors and
1243 * scalars. The components of the constructor parameters are assigned
1244 * to the matrix in column-major order until the matrix is full.
1246 * - Construct a matrix from a single matrix. The source matrix is copied
1247 * to the upper left portion of the constructed matrix, and the remaining
1248 * elements take values from the identity matrix.
1250 ir_rvalue
*const first_param
= (ir_rvalue
*) parameters
->head
;
1251 if (single_scalar_parameter(parameters
)) {
1252 /* Assign the scalar to the X component of a vec4, and fill the remaining
1253 * components with zero.
1255 glsl_base_type param_base_type
= first_param
->type
->base_type
;
1256 assert(param_base_type
== GLSL_TYPE_FLOAT
||
1257 param_base_type
== GLSL_TYPE_DOUBLE
);
1258 ir_variable
*rhs_var
=
1259 new(ctx
) ir_variable(glsl_type::get_instance(param_base_type
, 4, 1),
1262 instructions
->push_tail(rhs_var
);
1264 ir_constant_data zero
;
1265 for (unsigned i
= 0; i
< 4; i
++)
1266 if (param_base_type
== GLSL_TYPE_FLOAT
)
1271 ir_instruction
*inst
=
1272 new(ctx
) ir_assignment(new(ctx
) ir_dereference_variable(rhs_var
),
1273 new(ctx
) ir_constant(rhs_var
->type
, &zero
),
1275 instructions
->push_tail(inst
);
1277 ir_dereference
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1279 inst
= new(ctx
) ir_assignment(rhs_ref
, first_param
, NULL
, 0x01);
1280 instructions
->push_tail(inst
);
1282 /* Assign the temporary vector to each column of the destination matrix
1283 * with a swizzle that puts the X component on the diagonal of the
1284 * matrix. In some cases this may mean that the X component does not
1285 * get assigned into the column at all (i.e., when the matrix has more
1286 * columns than rows).
1288 static const unsigned rhs_swiz
[4][4] = {
1295 const unsigned cols_to_init
= MIN2(type
->matrix_columns
,
1296 type
->vector_elements
);
1297 for (unsigned i
= 0; i
< cols_to_init
; i
++) {
1298 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1299 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
1301 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1302 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, rhs_swiz
[i
],
1303 type
->vector_elements
);
1305 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
1306 instructions
->push_tail(inst
);
1309 for (unsigned i
= cols_to_init
; i
< type
->matrix_columns
; i
++) {
1310 ir_constant
*const col_idx
= new(ctx
) ir_constant(i
);
1311 ir_rvalue
*const col_ref
= new(ctx
) ir_dereference_array(var
, col_idx
);
1313 ir_rvalue
*const rhs_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1314 ir_rvalue
*const rhs
= new(ctx
) ir_swizzle(rhs_ref
, 1, 1, 1, 1,
1315 type
->vector_elements
);
1317 inst
= new(ctx
) ir_assignment(col_ref
, rhs
, NULL
);
1318 instructions
->push_tail(inst
);
1320 } else if (first_param
->type
->is_matrix()) {
1321 /* From page 50 (56 of the PDF) of the GLSL 1.50 spec:
1323 * "If a matrix is constructed from a matrix, then each component
1324 * (column i, row j) in the result that has a corresponding
1325 * component (column i, row j) in the argument will be initialized
1326 * from there. All other components will be initialized to the
1327 * identity matrix. If a matrix argument is given to a matrix
1328 * constructor, it is an error to have any other arguments."
1330 assert(first_param
->next
->is_tail_sentinel());
1331 ir_rvalue
*const src_matrix
= first_param
;
1333 /* If the source matrix is smaller, pre-initialize the relavent parts of
1334 * the destination matrix to the identity matrix.
1336 if ((src_matrix
->type
->matrix_columns
< var
->type
->matrix_columns
)
1337 || (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)) {
1339 /* If the source matrix has fewer rows, every column of the destination
1340 * must be initialized. Otherwise only the columns in the destination
1341 * that do not exist in the source must be initialized.
1344 (src_matrix
->type
->vector_elements
< var
->type
->vector_elements
)
1345 ? 0 : src_matrix
->type
->matrix_columns
;
1347 const glsl_type
*const col_type
= var
->type
->column_type();
1348 for (/* empty */; col
< var
->type
->matrix_columns
; col
++) {
1349 ir_constant_data ident
;
1358 ir_rvalue
*const rhs
= new(ctx
) ir_constant(col_type
, &ident
);
1360 ir_rvalue
*const lhs
=
1361 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(col
));
1363 ir_instruction
*inst
= new(ctx
) ir_assignment(lhs
, rhs
, NULL
);
1364 instructions
->push_tail(inst
);
1368 /* Assign columns from the source matrix to the destination matrix.
1370 * Since the parameter will be used in the RHS of multiple assignments,
1371 * generate a temporary and copy the paramter there.
1373 ir_variable
*const rhs_var
=
1374 new(ctx
) ir_variable(first_param
->type
, "mat_ctor_mat",
1376 instructions
->push_tail(rhs_var
);
1378 ir_dereference
*const rhs_var_ref
=
1379 new(ctx
) ir_dereference_variable(rhs_var
);
1380 ir_instruction
*const inst
=
1381 new(ctx
) ir_assignment(rhs_var_ref
, first_param
, NULL
);
1382 instructions
->push_tail(inst
);
1384 const unsigned last_row
= MIN2(src_matrix
->type
->vector_elements
,
1385 var
->type
->vector_elements
);
1386 const unsigned last_col
= MIN2(src_matrix
->type
->matrix_columns
,
1387 var
->type
->matrix_columns
);
1389 unsigned swiz
[4] = { 0, 0, 0, 0 };
1390 for (unsigned i
= 1; i
< last_row
; i
++)
1393 const unsigned write_mask
= (1U << last_row
) - 1;
1395 for (unsigned i
= 0; i
< last_col
; i
++) {
1396 ir_dereference
*const lhs
=
1397 new(ctx
) ir_dereference_array(var
, new(ctx
) ir_constant(i
));
1398 ir_rvalue
*const rhs_col
=
1399 new(ctx
) ir_dereference_array(rhs_var
, new(ctx
) ir_constant(i
));
1401 /* If one matrix has columns that are smaller than the columns of the
1402 * other matrix, wrap the column access of the larger with a swizzle
1403 * so that the LHS and RHS of the assignment have the same size (and
1404 * therefore have the same type).
1406 * It would be perfectly valid to unconditionally generate the
1407 * swizzles, this this will typically result in a more compact IR tree.
1410 if (lhs
->type
->vector_elements
!= rhs_col
->type
->vector_elements
) {
1411 rhs
= new(ctx
) ir_swizzle(rhs_col
, swiz
, last_row
);
1416 ir_instruction
*inst
=
1417 new(ctx
) ir_assignment(lhs
, rhs
, NULL
, write_mask
);
1418 instructions
->push_tail(inst
);
1421 const unsigned cols
= type
->matrix_columns
;
1422 const unsigned rows
= type
->vector_elements
;
1423 unsigned remaining_slots
= rows
* cols
;
1424 unsigned col_idx
= 0;
1425 unsigned row_idx
= 0;
1427 foreach_in_list(ir_rvalue
, rhs
, parameters
) {
1428 unsigned rhs_components
= rhs
->type
->components();
1429 unsigned rhs_base
= 0;
1431 if (remaining_slots
== 0)
1434 /* Since the parameter might be used in the RHS of two assignments,
1435 * generate a temporary and copy the paramter there.
1437 ir_variable
*rhs_var
=
1438 new(ctx
) ir_variable(rhs
->type
, "mat_ctor_vec", ir_var_temporary
);
1439 instructions
->push_tail(rhs_var
);
1441 ir_dereference
*rhs_var_ref
=
1442 new(ctx
) ir_dereference_variable(rhs_var
);
1443 ir_instruction
*inst
= new(ctx
) ir_assignment(rhs_var_ref
, rhs
, NULL
);
1444 instructions
->push_tail(inst
);
1447 /* Assign the current parameter to as many components of the matrix
1450 * NOTE: A single vector parameter can span two matrix columns. A
1451 * single vec4, for example, can completely fill a mat2.
1453 unsigned count
= MIN2(rows
- row_idx
,
1454 rhs_components
- rhs_base
);
1456 rhs_var_ref
= new(ctx
) ir_dereference_variable(rhs_var
);
1457 ir_instruction
*inst
= assign_to_matrix_column(var
, col_idx
,
1462 instructions
->push_tail(inst
);
1465 remaining_slots
-= count
;
1467 /* Sometimes, there is still data left in the parameters and
1468 * components left to be set in the destination but in other
1471 if (row_idx
>= rows
) {
1475 } while(remaining_slots
> 0 && rhs_base
< rhs_components
);
1479 return new(ctx
) ir_dereference_variable(var
);
1484 emit_inline_record_constructor(const glsl_type
*type
,
1485 exec_list
*instructions
,
1486 exec_list
*parameters
,
1489 ir_variable
*const var
=
1490 new(mem_ctx
) ir_variable(type
, "record_ctor", ir_var_temporary
);
1491 ir_dereference_variable
*const d
= new(mem_ctx
) ir_dereference_variable(var
);
1493 instructions
->push_tail(var
);
1495 exec_node
*node
= parameters
->head
;
1496 for (unsigned i
= 0; i
< type
->length
; i
++) {
1497 assert(!node
->is_tail_sentinel());
1499 ir_dereference
*const lhs
=
1500 new(mem_ctx
) ir_dereference_record(d
->clone(mem_ctx
, NULL
),
1501 type
->fields
.structure
[i
].name
);
1503 ir_rvalue
*const rhs
= ((ir_instruction
*) node
)->as_rvalue();
1504 assert(rhs
!= NULL
);
1506 ir_instruction
*const assign
= new(mem_ctx
) ir_assignment(lhs
, rhs
, NULL
);
1508 instructions
->push_tail(assign
);
1517 process_record_constructor(exec_list
*instructions
,
1518 const glsl_type
*constructor_type
,
1519 YYLTYPE
*loc
, exec_list
*parameters
,
1520 struct _mesa_glsl_parse_state
*state
)
1523 exec_list actual_parameters
;
1525 process_parameters(instructions
, &actual_parameters
,
1528 exec_node
*node
= actual_parameters
.head
;
1529 for (unsigned i
= 0; i
< constructor_type
->length
; i
++) {
1530 ir_rvalue
*ir
= (ir_rvalue
*) node
;
1532 if (node
->is_tail_sentinel()) {
1533 _mesa_glsl_error(loc
, state
,
1534 "insufficient parameters to constructor for `%s'",
1535 constructor_type
->name
);
1536 return ir_rvalue::error_value(ctx
);
1539 if (apply_implicit_conversion(constructor_type
->fields
.structure
[i
].type
,
1541 node
->replace_with(ir
);
1543 _mesa_glsl_error(loc
, state
,
1544 "parameter type mismatch in constructor for `%s.%s' "
1546 constructor_type
->name
,
1547 constructor_type
->fields
.structure
[i
].name
,
1549 constructor_type
->fields
.structure
[i
].type
->name
);
1550 return ir_rvalue::error_value(ctx
);;
1556 if (!node
->is_tail_sentinel()) {
1557 _mesa_glsl_error(loc
, state
, "too many parameters in constructor "
1558 "for `%s'", constructor_type
->name
);
1559 return ir_rvalue::error_value(ctx
);
1562 ir_rvalue
*const constant
=
1563 constant_record_constructor(constructor_type
, &actual_parameters
,
1566 return (constant
!= NULL
)
1568 : emit_inline_record_constructor(constructor_type
, instructions
,
1569 &actual_parameters
, state
);
1573 ast_function_expression::handle_method(exec_list
*instructions
,
1574 struct _mesa_glsl_parse_state
*state
)
1576 const ast_expression
*field
= subexpressions
[0];
1580 /* Handle "method calls" in GLSL 1.20 - namely, array.length() */
1581 YYLTYPE loc
= get_location();
1582 state
->check_version(120, 300, &loc
, "methods not supported");
1585 method
= field
->primary_expression
.identifier
;
1587 op
= field
->subexpressions
[0]->hir(instructions
, state
);
1588 if (strcmp(method
, "length") == 0) {
1589 if (!this->expressions
.is_empty()) {
1590 _mesa_glsl_error(&loc
, state
, "length method takes no arguments");
1594 if (op
->type
->is_array()) {
1595 if (op
->type
->is_unsized_array()) {
1596 _mesa_glsl_error(&loc
, state
, "length called on unsized array");
1600 result
= new(ctx
) ir_constant(op
->type
->array_size());
1601 } else if (op
->type
->is_vector()) {
1602 if (state
->ARB_shading_language_420pack_enable
) {
1603 /* .length() returns int. */
1604 result
= new(ctx
) ir_constant((int) op
->type
->vector_elements
);
1606 _mesa_glsl_error(&loc
, state
, "length method on matrix only available"
1607 "with ARB_shading_language_420pack");
1610 } else if (op
->type
->is_matrix()) {
1611 if (state
->ARB_shading_language_420pack_enable
) {
1612 /* .length() returns int. */
1613 result
= new(ctx
) ir_constant((int) op
->type
->matrix_columns
);
1615 _mesa_glsl_error(&loc
, state
, "length method on matrix only available"
1616 "with ARB_shading_language_420pack");
1620 _mesa_glsl_error(&loc
, state
, "length called on scalar.");
1624 _mesa_glsl_error(&loc
, state
, "unknown method: `%s'", method
);
1629 return ir_rvalue::error_value(ctx
);
1633 ast_function_expression::hir(exec_list
*instructions
,
1634 struct _mesa_glsl_parse_state
*state
)
1637 /* There are three sorts of function calls.
1639 * 1. constructors - The first subexpression is an ast_type_specifier.
1640 * 2. methods - Only the .length() method of array types.
1641 * 3. functions - Calls to regular old functions.
1644 if (is_constructor()) {
1645 const ast_type_specifier
*type
= (ast_type_specifier
*) subexpressions
[0];
1646 YYLTYPE loc
= type
->get_location();
1649 const glsl_type
*const constructor_type
= type
->glsl_type(& name
, state
);
1651 /* constructor_type can be NULL if a variable with the same name as the
1652 * structure has come into scope.
1654 if (constructor_type
== NULL
) {
1655 _mesa_glsl_error(& loc
, state
, "unknown type `%s' (structure name "
1656 "may be shadowed by a variable with the same name)",
1658 return ir_rvalue::error_value(ctx
);
1662 /* Constructors for opaque types are illegal.
1664 if (constructor_type
->contains_opaque()) {
1665 _mesa_glsl_error(& loc
, state
, "cannot construct opaque type `%s'",
1666 constructor_type
->name
);
1667 return ir_rvalue::error_value(ctx
);
1670 if (constructor_type
->is_array()) {
1671 if (!state
->check_version(120, 300, &loc
,
1672 "array constructors forbidden")) {
1673 return ir_rvalue::error_value(ctx
);
1676 return process_array_constructor(instructions
, constructor_type
,
1677 & loc
, &this->expressions
, state
);
1681 /* There are two kinds of constructor calls. Constructors for arrays and
1682 * structures must have the exact number of arguments with matching types
1683 * in the correct order. These constructors follow essentially the same
1684 * type matching rules as functions.
1686 * Constructors for built-in language types, such as mat4 and vec2, are
1687 * free form. The only requirements are that the parameters must provide
1688 * enough values of the correct scalar type and that no arguments are
1689 * given past the last used argument.
1691 * When using the C-style initializer syntax from GLSL 4.20, constructors
1692 * must have the exact number of arguments with matching types in the
1695 if (constructor_type
->is_record()) {
1696 return process_record_constructor(instructions
, constructor_type
,
1697 &loc
, &this->expressions
,
1701 if (!constructor_type
->is_numeric() && !constructor_type
->is_boolean())
1702 return ir_rvalue::error_value(ctx
);
1704 /* Total number of components of the type being constructed. */
1705 const unsigned type_components
= constructor_type
->components();
1707 /* Number of components from parameters that have actually been
1708 * consumed. This is used to perform several kinds of error checking.
1710 unsigned components_used
= 0;
1712 unsigned matrix_parameters
= 0;
1713 unsigned nonmatrix_parameters
= 0;
1714 exec_list actual_parameters
;
1716 foreach_list_typed(ast_node
, ast
, link
, &this->expressions
) {
1717 ir_rvalue
*result
= ast
->hir(instructions
, state
);
1719 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1721 * "It is an error to provide extra arguments beyond this
1722 * last used argument."
1724 if (components_used
>= type_components
) {
1725 _mesa_glsl_error(& loc
, state
, "too many parameters to `%s' "
1727 constructor_type
->name
);
1728 return ir_rvalue::error_value(ctx
);
1731 if (!result
->type
->is_numeric() && !result
->type
->is_boolean()) {
1732 _mesa_glsl_error(& loc
, state
, "cannot construct `%s' from a "
1733 "non-numeric data type",
1734 constructor_type
->name
);
1735 return ir_rvalue::error_value(ctx
);
1738 /* Count the number of matrix and nonmatrix parameters. This
1739 * is used below to enforce some of the constructor rules.
1741 if (result
->type
->is_matrix())
1742 matrix_parameters
++;
1744 nonmatrix_parameters
++;
1746 actual_parameters
.push_tail(result
);
1747 components_used
+= result
->type
->components();
1750 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1752 * "It is an error to construct matrices from other matrices. This
1753 * is reserved for future use."
1755 if (matrix_parameters
> 0
1756 && constructor_type
->is_matrix()
1757 && !state
->check_version(120, 100, &loc
,
1758 "cannot construct `%s' from a matrix",
1759 constructor_type
->name
)) {
1760 return ir_rvalue::error_value(ctx
);
1763 /* From page 50 (page 56 of the PDF) of the GLSL 1.50 spec:
1765 * "If a matrix argument is given to a matrix constructor, it is
1766 * an error to have any other arguments."
1768 if ((matrix_parameters
> 0)
1769 && ((matrix_parameters
+ nonmatrix_parameters
) > 1)
1770 && constructor_type
->is_matrix()) {
1771 _mesa_glsl_error(& loc
, state
, "for matrix `%s' constructor, "
1772 "matrix must be only parameter",
1773 constructor_type
->name
);
1774 return ir_rvalue::error_value(ctx
);
1777 /* From page 28 (page 34 of the PDF) of the GLSL 1.10 spec:
1779 * "In these cases, there must be enough components provided in the
1780 * arguments to provide an initializer for every component in the
1781 * constructed value."
1783 if (components_used
< type_components
&& components_used
!= 1
1784 && matrix_parameters
== 0) {
1785 _mesa_glsl_error(& loc
, state
, "too few components to construct "
1787 constructor_type
->name
);
1788 return ir_rvalue::error_value(ctx
);
1791 /* Matrices can never be consumed as is by any constructor but matrix
1792 * constructors. If the constructor type is not matrix, always break the
1793 * matrix up into a series of column vectors.
1795 if (!constructor_type
->is_matrix()) {
1796 foreach_in_list_safe(ir_rvalue
, matrix
, &actual_parameters
) {
1797 if (!matrix
->type
->is_matrix())
1800 /* Create a temporary containing the matrix. */
1801 ir_variable
*var
= new(ctx
) ir_variable(matrix
->type
, "matrix_tmp",
1803 instructions
->push_tail(var
);
1804 instructions
->push_tail(new(ctx
) ir_assignment(new(ctx
)
1805 ir_dereference_variable(var
), matrix
, NULL
));
1806 var
->constant_value
= matrix
->constant_expression_value();
1808 /* Replace the matrix with dereferences of its columns. */
1809 for (int i
= 0; i
< matrix
->type
->matrix_columns
; i
++) {
1810 matrix
->insert_before(new (ctx
) ir_dereference_array(var
,
1811 new(ctx
) ir_constant(i
)));
1817 bool all_parameters_are_constant
= true;
1819 /* Type cast each parameter and, if possible, fold constants.*/
1820 foreach_in_list_safe(ir_rvalue
, ir
, &actual_parameters
) {
1821 const glsl_type
*desired_type
=
1822 glsl_type::get_instance(constructor_type
->base_type
,
1823 ir
->type
->vector_elements
,
1824 ir
->type
->matrix_columns
);
1825 ir_rvalue
*result
= convert_component(ir
, desired_type
);
1827 /* Attempt to convert the parameter to a constant valued expression.
1828 * After doing so, track whether or not all the parameters to the
1829 * constructor are trivially constant valued expressions.
1831 ir_rvalue
*const constant
= result
->constant_expression_value();
1833 if (constant
!= NULL
)
1836 all_parameters_are_constant
= false;
1839 ir
->replace_with(result
);
1843 /* If all of the parameters are trivially constant, create a
1844 * constant representing the complete collection of parameters.
1846 if (all_parameters_are_constant
) {
1847 return new(ctx
) ir_constant(constructor_type
, &actual_parameters
);
1848 } else if (constructor_type
->is_scalar()) {
1849 return dereference_component((ir_rvalue
*) actual_parameters
.head
,
1851 } else if (constructor_type
->is_vector()) {
1852 return emit_inline_vector_constructor(constructor_type
,
1857 assert(constructor_type
->is_matrix());
1858 return emit_inline_matrix_constructor(constructor_type
,
1863 } else if (subexpressions
[0]->oper
== ast_field_selection
) {
1864 return handle_method(instructions
, state
);
1866 const ast_expression
*id
= subexpressions
[0];
1867 const char *func_name
;
1868 YYLTYPE loc
= get_location();
1869 exec_list actual_parameters
;
1870 ir_variable
*sub_var
= NULL
;
1871 ir_rvalue
*array_idx
= NULL
;
1873 if (id
->oper
== ast_array_index
) {
1874 func_name
= id
->subexpressions
[0]->primary_expression
.identifier
;
1875 array_idx
= id
->subexpressions
[1]->hir(instructions
, state
);
1877 func_name
= id
->primary_expression
.identifier
;
1880 process_parameters(instructions
, &actual_parameters
, &this->expressions
,
1883 ir_function_signature
*sig
=
1884 match_function_by_name(func_name
, &actual_parameters
, state
);
1886 ir_rvalue
*value
= NULL
;
1888 sig
= match_subroutine_by_name(func_name
, &actual_parameters
, state
, &sub_var
);
1892 no_matching_function_error(func_name
, &loc
, &actual_parameters
, state
);
1893 value
= ir_rvalue::error_value(ctx
);
1894 } else if (!verify_parameter_modes(state
, sig
, actual_parameters
, this->expressions
)) {
1895 /* an error has already been emitted */
1896 value
= ir_rvalue::error_value(ctx
);
1898 value
= generate_call(instructions
, sig
, &actual_parameters
, sub_var
, array_idx
, state
);
1900 ir_variable
*const tmp
= new(ctx
) ir_variable(glsl_type::void_type
,
1903 instructions
->push_tail(tmp
);
1904 value
= new(ctx
) ir_dereference_variable(tmp
);
1911 unreachable("not reached");
1915 ast_aggregate_initializer::hir(exec_list
*instructions
,
1916 struct _mesa_glsl_parse_state
*state
)
1919 YYLTYPE loc
= this->get_location();
1921 if (!this->constructor_type
) {
1922 _mesa_glsl_error(&loc
, state
, "type of C-style initializer unknown");
1923 return ir_rvalue::error_value(ctx
);
1925 const glsl_type
*const constructor_type
= this->constructor_type
;
1927 if (!state
->ARB_shading_language_420pack_enable
) {
1928 _mesa_glsl_error(&loc
, state
, "C-style initialization requires the "
1929 "GL_ARB_shading_language_420pack extension");
1930 return ir_rvalue::error_value(ctx
);
1933 if (constructor_type
->is_array()) {
1934 return process_array_constructor(instructions
, constructor_type
, &loc
,
1935 &this->expressions
, state
);
1938 if (constructor_type
->is_record()) {
1939 return process_record_constructor(instructions
, constructor_type
, &loc
,
1940 &this->expressions
, state
);
1943 return process_vec_mat_constructor(instructions
, constructor_type
, &loc
,
1944 &this->expressions
, state
);