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 "main/core.h" /* for MAX2 */
26 #include "ir_visitor.h"
27 #include "glsl_types.h"
29 ir_rvalue::ir_rvalue()
31 this->type
= glsl_type::error_type
;
34 bool ir_rvalue::is_zero() const
39 bool ir_rvalue::is_one() const
44 bool ir_rvalue::is_negative_one() const
49 bool ir_rvalue::is_basis() const
55 * Modify the swizzle make to move one component to another
57 * \param m IR swizzle to be modified
58 * \param from Component in the RHS that is to be swizzled
59 * \param to Desired swizzle location of \c from
62 update_rhs_swizzle(ir_swizzle_mask
&m
, unsigned from
, unsigned to
)
65 case 0: m
.x
= from
; break;
66 case 1: m
.y
= from
; break;
67 case 2: m
.z
= from
; break;
68 case 3: m
.w
= from
; break;
69 default: assert(!"Should not get here.");
72 m
.num_components
= MAX2(m
.num_components
, (to
+ 1));
76 ir_assignment::set_lhs(ir_rvalue
*lhs
)
79 bool swizzled
= false;
82 ir_swizzle
*swiz
= lhs
->as_swizzle();
87 unsigned write_mask
= 0;
88 ir_swizzle_mask rhs_swiz
= { 0, 0, 0, 0, 0, 0 };
90 for (unsigned i
= 0; i
< swiz
->mask
.num_components
; i
++) {
94 case 0: c
= swiz
->mask
.x
; break;
95 case 1: c
= swiz
->mask
.y
; break;
96 case 2: c
= swiz
->mask
.z
; break;
97 case 3: c
= swiz
->mask
.w
; break;
98 default: assert(!"Should not get here.");
101 write_mask
|= (((this->write_mask
>> i
) & 1) << c
);
102 update_rhs_swizzle(rhs_swiz
, i
, c
);
105 this->write_mask
= write_mask
;
108 this->rhs
= new(mem_ctx
) ir_swizzle(this->rhs
, rhs_swiz
);
113 /* Now, RHS channels line up with the LHS writemask. Collapse it
114 * to just the channels that will be written.
116 ir_swizzle_mask rhs_swiz
= { 0, 0, 0, 0, 0, 0 };
118 for (int i
= 0; i
< 4; i
++) {
119 if (write_mask
& (1 << i
))
120 update_rhs_swizzle(rhs_swiz
, i
, rhs_chan
++);
122 this->rhs
= new(mem_ctx
) ir_swizzle(this->rhs
, rhs_swiz
);
125 assert((lhs
== NULL
) || lhs
->as_dereference());
127 this->lhs
= (ir_dereference
*) lhs
;
131 ir_assignment::whole_variable_written()
133 ir_variable
*v
= this->lhs
->whole_variable_referenced();
138 if (v
->type
->is_scalar())
141 if (v
->type
->is_vector()) {
142 const unsigned mask
= (1U << v
->type
->vector_elements
) - 1;
144 if (mask
!= this->write_mask
)
148 /* Either all the vector components are assigned or the variable is some
149 * composite type (and the whole thing is assigned.
154 ir_assignment::ir_assignment(ir_dereference
*lhs
, ir_rvalue
*rhs
,
155 ir_rvalue
*condition
, unsigned write_mask
)
157 this->ir_type
= ir_type_assignment
;
158 this->condition
= condition
;
161 this->write_mask
= write_mask
;
163 if (lhs
->type
->is_scalar() || lhs
->type
->is_vector()) {
164 int lhs_components
= 0;
165 for (int i
= 0; i
< 4; i
++) {
166 if (write_mask
& (1 << i
))
170 assert(lhs_components
== this->rhs
->type
->vector_elements
);
174 ir_assignment::ir_assignment(ir_rvalue
*lhs
, ir_rvalue
*rhs
,
175 ir_rvalue
*condition
)
177 this->ir_type
= ir_type_assignment
;
178 this->condition
= condition
;
181 /* If the RHS is a vector type, assume that all components of the vector
182 * type are being written to the LHS. The write mask comes from the RHS
183 * because we can have a case where the LHS is a vec4 and the RHS is a
184 * vec3. In that case, the assignment is:
186 * (assign (...) (xyz) (var_ref lhs) (var_ref rhs))
188 if (rhs
->type
->is_vector())
189 this->write_mask
= (1U << rhs
->type
->vector_elements
) - 1;
190 else if (rhs
->type
->is_scalar())
191 this->write_mask
= 1;
193 this->write_mask
= 0;
198 ir_expression::ir_expression(int op
, const struct glsl_type
*type
,
199 ir_rvalue
*op0
, ir_rvalue
*op1
,
200 ir_rvalue
*op2
, ir_rvalue
*op3
)
202 this->ir_type
= ir_type_expression
;
204 this->operation
= ir_expression_operation(op
);
205 this->operands
[0] = op0
;
206 this->operands
[1] = op1
;
207 this->operands
[2] = op2
;
208 this->operands
[3] = op3
;
210 int num_operands
= get_num_operands(this->operation
);
211 for (int i
= num_operands
; i
< 4; i
++) {
212 assert(this->operands
[i
] == NULL
);
217 ir_expression::ir_expression(int op
, ir_rvalue
*op0
)
219 this->ir_type
= ir_type_expression
;
221 this->operation
= ir_expression_operation(op
);
222 this->operands
[0] = op0
;
223 this->operands
[1] = NULL
;
224 this->operands
[2] = NULL
;
225 this->operands
[3] = NULL
;
227 assert(op
<= ir_last_unop
);
229 switch (this->operation
) {
230 case ir_unop_bit_not
:
231 case ir_unop_logic_not
:
246 case ir_unop_round_even
:
249 case ir_unop_sin_reduced
:
250 case ir_unop_cos_reduced
:
253 case ir_unop_bitfield_reverse
:
254 this->type
= op0
->type
;
260 case ir_unop_bitcast_f2i
:
261 case ir_unop_bit_count
:
262 case ir_unop_find_msb
:
263 case ir_unop_find_lsb
:
264 this->type
= glsl_type::get_instance(GLSL_TYPE_INT
,
265 op0
->type
->vector_elements
, 1);
271 case ir_unop_bitcast_i2f
:
272 case ir_unop_bitcast_u2f
:
273 this->type
= glsl_type::get_instance(GLSL_TYPE_FLOAT
,
274 op0
->type
->vector_elements
, 1);
279 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
280 op0
->type
->vector_elements
, 1);
285 case ir_unop_bitcast_f2u
:
286 this->type
= glsl_type::get_instance(GLSL_TYPE_UINT
,
287 op0
->type
->vector_elements
, 1);
291 case ir_unop_unpack_half_2x16_split_x
:
292 case ir_unop_unpack_half_2x16_split_y
:
293 this->type
= glsl_type::float_type
;
297 this->type
= glsl_type::bool_type
;
300 case ir_unop_pack_snorm_2x16
:
301 case ir_unop_pack_snorm_4x8
:
302 case ir_unop_pack_unorm_2x16
:
303 case ir_unop_pack_unorm_4x8
:
304 case ir_unop_pack_half_2x16
:
305 this->type
= glsl_type::uint_type
;
308 case ir_unop_unpack_snorm_2x16
:
309 case ir_unop_unpack_unorm_2x16
:
310 case ir_unop_unpack_half_2x16
:
311 this->type
= glsl_type::vec2_type
;
314 case ir_unop_unpack_snorm_4x8
:
315 case ir_unop_unpack_unorm_4x8
:
316 this->type
= glsl_type::vec4_type
;
320 assert(!"not reached: missing automatic type setup for ir_expression");
321 this->type
= op0
->type
;
326 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
)
328 this->ir_type
= ir_type_expression
;
330 this->operation
= ir_expression_operation(op
);
331 this->operands
[0] = op0
;
332 this->operands
[1] = op1
;
333 this->operands
[2] = NULL
;
334 this->operands
[3] = NULL
;
336 assert(op
> ir_last_unop
);
338 switch (this->operation
) {
339 case ir_binop_all_equal
:
340 case ir_binop_any_nequal
:
341 this->type
= glsl_type::bool_type
;
352 if (op0
->type
->is_scalar()) {
353 this->type
= op1
->type
;
354 } else if (op1
->type
->is_scalar()) {
355 this->type
= op0
->type
;
357 /* FINISHME: matrix types */
358 assert(!op0
->type
->is_matrix() && !op1
->type
->is_matrix());
359 assert(op0
->type
== op1
->type
);
360 this->type
= op0
->type
;
364 case ir_binop_logic_and
:
365 case ir_binop_logic_xor
:
366 case ir_binop_logic_or
:
367 case ir_binop_bit_and
:
368 case ir_binop_bit_xor
:
369 case ir_binop_bit_or
:
370 assert(!op0
->type
->is_matrix());
371 assert(!op1
->type
->is_matrix());
372 if (op0
->type
->is_scalar()) {
373 this->type
= op1
->type
;
374 } else if (op1
->type
->is_scalar()) {
375 this->type
= op0
->type
;
377 assert(op0
->type
->vector_elements
== op1
->type
->vector_elements
);
378 this->type
= op0
->type
;
383 case ir_binop_nequal
:
384 case ir_binop_lequal
:
385 case ir_binop_gequal
:
387 case ir_binop_greater
:
388 assert(op0
->type
== op1
->type
);
389 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
,
390 op0
->type
->vector_elements
, 1);
394 this->type
= glsl_type::float_type
;
397 case ir_binop_pack_half_2x16_split
:
398 this->type
= glsl_type::uint_type
;
401 case ir_binop_imul_high
:
403 case ir_binop_borrow
:
404 case ir_binop_lshift
:
405 case ir_binop_rshift
:
408 this->type
= op0
->type
;
411 case ir_binop_vector_extract
:
412 this->type
= op0
->type
->get_scalar_type();
416 assert(!"not reached: missing automatic type setup for ir_expression");
417 this->type
= glsl_type::float_type
;
421 ir_expression::ir_expression(int op
, ir_rvalue
*op0
, ir_rvalue
*op1
,
424 this->ir_type
= ir_type_expression
;
426 this->operation
= ir_expression_operation(op
);
427 this->operands
[0] = op0
;
428 this->operands
[1] = op1
;
429 this->operands
[2] = op2
;
430 this->operands
[3] = NULL
;
432 assert(op
> ir_last_binop
&& op
<= ir_last_triop
);
434 switch (this->operation
) {
437 case ir_triop_bitfield_extract
:
438 case ir_triop_vector_insert
:
439 this->type
= op0
->type
;
444 this->type
= op1
->type
;
448 assert(!"not reached: missing automatic type setup for ir_expression");
449 this->type
= glsl_type::float_type
;
454 ir_expression::get_num_operands(ir_expression_operation op
)
456 assert(op
<= ir_last_opcode
);
458 if (op
<= ir_last_unop
)
461 if (op
<= ir_last_binop
)
464 if (op
<= ir_last_triop
)
467 if (op
<= ir_last_quadop
)
474 static const char *const operator_strs
[] = {
523 "unpackHalf2x16_split_x",
524 "unpackHalf2x16_split_y",
558 "packHalf2x16_split",
573 const char *ir_expression::operator_string(ir_expression_operation op
)
575 assert((unsigned int) op
< Elements(operator_strs
));
576 assert(Elements(operator_strs
) == (ir_quadop_vector
+ 1));
577 return operator_strs
[op
];
580 const char *ir_expression::operator_string()
582 return operator_string(this->operation
);
586 depth_layout_string(ir_depth_layout layout
)
589 case ir_depth_layout_none
: return "";
590 case ir_depth_layout_any
: return "depth_any";
591 case ir_depth_layout_greater
: return "depth_greater";
592 case ir_depth_layout_less
: return "depth_less";
593 case ir_depth_layout_unchanged
: return "depth_unchanged";
601 ir_expression_operation
602 ir_expression::get_operator(const char *str
)
604 const int operator_count
= sizeof(operator_strs
) / sizeof(operator_strs
[0]);
605 for (int op
= 0; op
< operator_count
; op
++) {
606 if (strcmp(str
, operator_strs
[op
]) == 0)
607 return (ir_expression_operation
) op
;
609 return (ir_expression_operation
) -1;
612 ir_constant::ir_constant()
614 this->ir_type
= ir_type_constant
;
617 ir_constant::ir_constant(const struct glsl_type
*type
,
618 const ir_constant_data
*data
)
620 assert((type
->base_type
>= GLSL_TYPE_UINT
)
621 && (type
->base_type
<= GLSL_TYPE_BOOL
));
623 this->ir_type
= ir_type_constant
;
625 memcpy(& this->value
, data
, sizeof(this->value
));
628 ir_constant::ir_constant(float f
, unsigned vector_elements
)
630 assert(vector_elements
<= 4);
631 this->ir_type
= ir_type_constant
;
632 this->type
= glsl_type::get_instance(GLSL_TYPE_FLOAT
, vector_elements
, 1);
633 for (unsigned i
= 0; i
< vector_elements
; i
++) {
634 this->value
.f
[i
] = f
;
636 for (unsigned i
= vector_elements
; i
< 16; i
++) {
637 this->value
.f
[i
] = 0;
641 ir_constant::ir_constant(unsigned int u
, unsigned vector_elements
)
643 assert(vector_elements
<= 4);
644 this->ir_type
= ir_type_constant
;
645 this->type
= glsl_type::get_instance(GLSL_TYPE_UINT
, vector_elements
, 1);
646 for (unsigned i
= 0; i
< vector_elements
; i
++) {
647 this->value
.u
[i
] = u
;
649 for (unsigned i
= vector_elements
; i
< 16; i
++) {
650 this->value
.u
[i
] = 0;
654 ir_constant::ir_constant(int integer
, unsigned vector_elements
)
656 assert(vector_elements
<= 4);
657 this->ir_type
= ir_type_constant
;
658 this->type
= glsl_type::get_instance(GLSL_TYPE_INT
, vector_elements
, 1);
659 for (unsigned i
= 0; i
< vector_elements
; i
++) {
660 this->value
.i
[i
] = integer
;
662 for (unsigned i
= vector_elements
; i
< 16; i
++) {
663 this->value
.i
[i
] = 0;
667 ir_constant::ir_constant(bool b
, unsigned vector_elements
)
669 assert(vector_elements
<= 4);
670 this->ir_type
= ir_type_constant
;
671 this->type
= glsl_type::get_instance(GLSL_TYPE_BOOL
, vector_elements
, 1);
672 for (unsigned i
= 0; i
< vector_elements
; i
++) {
673 this->value
.b
[i
] = b
;
675 for (unsigned i
= vector_elements
; i
< 16; i
++) {
676 this->value
.b
[i
] = false;
680 ir_constant::ir_constant(const ir_constant
*c
, unsigned i
)
682 this->ir_type
= ir_type_constant
;
683 this->type
= c
->type
->get_base_type();
685 switch (this->type
->base_type
) {
686 case GLSL_TYPE_UINT
: this->value
.u
[0] = c
->value
.u
[i
]; break;
687 case GLSL_TYPE_INT
: this->value
.i
[0] = c
->value
.i
[i
]; break;
688 case GLSL_TYPE_FLOAT
: this->value
.f
[0] = c
->value
.f
[i
]; break;
689 case GLSL_TYPE_BOOL
: this->value
.b
[0] = c
->value
.b
[i
]; break;
690 default: assert(!"Should not get here."); break;
694 ir_constant::ir_constant(const struct glsl_type
*type
, exec_list
*value_list
)
696 this->ir_type
= ir_type_constant
;
699 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
700 || type
->is_record() || type
->is_array());
702 if (type
->is_array()) {
703 this->array_elements
= ralloc_array(this, ir_constant
*, type
->length
);
705 foreach_list(node
, value_list
) {
706 ir_constant
*value
= (ir_constant
*) node
;
707 assert(value
->as_constant() != NULL
);
709 this->array_elements
[i
++] = value
;
714 /* If the constant is a record, the types of each of the entries in
715 * value_list must be a 1-for-1 match with the structure components. Each
716 * entry must also be a constant. Just move the nodes from the value_list
717 * to the list in the ir_constant.
719 /* FINISHME: Should there be some type checking and / or assertions here? */
720 /* FINISHME: Should the new constant take ownership of the nodes from
721 * FINISHME: value_list, or should it make copies?
723 if (type
->is_record()) {
724 value_list
->move_nodes_to(& this->components
);
728 for (unsigned i
= 0; i
< 16; i
++) {
729 this->value
.u
[i
] = 0;
732 ir_constant
*value
= (ir_constant
*) (value_list
->head
);
734 /* Constructors with exactly one scalar argument are special for vectors
735 * and matrices. For vectors, the scalar value is replicated to fill all
736 * the components. For matrices, the scalar fills the components of the
737 * diagonal while the rest is filled with 0.
739 if (value
->type
->is_scalar() && value
->next
->is_tail_sentinel()) {
740 if (type
->is_matrix()) {
741 /* Matrix - fill diagonal (rest is already set to 0) */
742 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
743 for (unsigned i
= 0; i
< type
->matrix_columns
; i
++)
744 this->value
.f
[i
* type
->vector_elements
+ i
] = value
->value
.f
[0];
746 /* Vector or scalar - fill all components */
747 switch (type
->base_type
) {
750 for (unsigned i
= 0; i
< type
->components(); i
++)
751 this->value
.u
[i
] = value
->value
.u
[0];
753 case GLSL_TYPE_FLOAT
:
754 for (unsigned i
= 0; i
< type
->components(); i
++)
755 this->value
.f
[i
] = value
->value
.f
[0];
758 for (unsigned i
= 0; i
< type
->components(); i
++)
759 this->value
.b
[i
] = value
->value
.b
[0];
762 assert(!"Should not get here.");
769 if (type
->is_matrix() && value
->type
->is_matrix()) {
770 assert(value
->next
->is_tail_sentinel());
772 /* From section 5.4.2 of the GLSL 1.20 spec:
773 * "If a matrix is constructed from a matrix, then each component
774 * (column i, row j) in the result that has a corresponding component
775 * (column i, row j) in the argument will be initialized from there."
777 unsigned cols
= MIN2(type
->matrix_columns
, value
->type
->matrix_columns
);
778 unsigned rows
= MIN2(type
->vector_elements
, value
->type
->vector_elements
);
779 for (unsigned i
= 0; i
< cols
; i
++) {
780 for (unsigned j
= 0; j
< rows
; j
++) {
781 const unsigned src
= i
* value
->type
->vector_elements
+ j
;
782 const unsigned dst
= i
* type
->vector_elements
+ j
;
783 this->value
.f
[dst
] = value
->value
.f
[src
];
787 /* "All other components will be initialized to the identity matrix." */
788 for (unsigned i
= cols
; i
< type
->matrix_columns
; i
++)
789 this->value
.f
[i
* type
->vector_elements
+ i
] = 1.0;
794 /* Use each component from each entry in the value_list to initialize one
795 * component of the constant being constructed.
797 for (unsigned i
= 0; i
< type
->components(); /* empty */) {
798 assert(value
->as_constant() != NULL
);
799 assert(!value
->is_tail_sentinel());
801 for (unsigned j
= 0; j
< value
->type
->components(); j
++) {
802 switch (type
->base_type
) {
804 this->value
.u
[i
] = value
->get_uint_component(j
);
807 this->value
.i
[i
] = value
->get_int_component(j
);
809 case GLSL_TYPE_FLOAT
:
810 this->value
.f
[i
] = value
->get_float_component(j
);
813 this->value
.b
[i
] = value
->get_bool_component(j
);
816 /* FINISHME: What to do? Exceptions are not the answer.
822 if (i
>= type
->components())
826 value
= (ir_constant
*) value
->next
;
831 ir_constant::zero(void *mem_ctx
, const glsl_type
*type
)
833 assert(type
->is_scalar() || type
->is_vector() || type
->is_matrix()
834 || type
->is_record() || type
->is_array());
836 ir_constant
*c
= new(mem_ctx
) ir_constant
;
838 memset(&c
->value
, 0, sizeof(c
->value
));
840 if (type
->is_array()) {
841 c
->array_elements
= ralloc_array(c
, ir_constant
*, type
->length
);
843 for (unsigned i
= 0; i
< type
->length
; i
++)
844 c
->array_elements
[i
] = ir_constant::zero(c
, type
->element_type());
847 if (type
->is_record()) {
848 for (unsigned i
= 0; i
< type
->length
; i
++) {
849 ir_constant
*comp
= ir_constant::zero(mem_ctx
, type
->fields
.structure
[i
].type
);
850 c
->components
.push_tail(comp
);
858 ir_constant::get_bool_component(unsigned i
) const
860 switch (this->type
->base_type
) {
861 case GLSL_TYPE_UINT
: return this->value
.u
[i
] != 0;
862 case GLSL_TYPE_INT
: return this->value
.i
[i
] != 0;
863 case GLSL_TYPE_FLOAT
: return ((int)this->value
.f
[i
]) != 0;
864 case GLSL_TYPE_BOOL
: return this->value
.b
[i
];
865 default: assert(!"Should not get here."); break;
868 /* Must return something to make the compiler happy. This is clearly an
875 ir_constant::get_float_component(unsigned i
) const
877 switch (this->type
->base_type
) {
878 case GLSL_TYPE_UINT
: return (float) this->value
.u
[i
];
879 case GLSL_TYPE_INT
: return (float) this->value
.i
[i
];
880 case GLSL_TYPE_FLOAT
: return this->value
.f
[i
];
881 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1.0f
: 0.0f
;
882 default: assert(!"Should not get here."); break;
885 /* Must return something to make the compiler happy. This is clearly an
892 ir_constant::get_int_component(unsigned i
) const
894 switch (this->type
->base_type
) {
895 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
896 case GLSL_TYPE_INT
: return this->value
.i
[i
];
897 case GLSL_TYPE_FLOAT
: return (int) this->value
.f
[i
];
898 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
899 default: assert(!"Should not get here."); break;
902 /* Must return something to make the compiler happy. This is clearly an
909 ir_constant::get_uint_component(unsigned i
) const
911 switch (this->type
->base_type
) {
912 case GLSL_TYPE_UINT
: return this->value
.u
[i
];
913 case GLSL_TYPE_INT
: return this->value
.i
[i
];
914 case GLSL_TYPE_FLOAT
: return (unsigned) this->value
.f
[i
];
915 case GLSL_TYPE_BOOL
: return this->value
.b
[i
] ? 1 : 0;
916 default: assert(!"Should not get here."); break;
919 /* Must return something to make the compiler happy. This is clearly an
926 ir_constant::get_array_element(unsigned i
) const
928 assert(this->type
->is_array());
930 /* From page 35 (page 41 of the PDF) of the GLSL 1.20 spec:
932 * "Behavior is undefined if a shader subscripts an array with an index
933 * less than 0 or greater than or equal to the size the array was
936 * Most out-of-bounds accesses are removed before things could get this far.
937 * There are cases where non-constant array index values can get constant
942 else if (i
>= this->type
->length
)
943 i
= this->type
->length
- 1;
945 return array_elements
[i
];
949 ir_constant::get_record_field(const char *name
)
951 int idx
= this->type
->field_index(name
);
956 if (this->components
.is_empty())
959 exec_node
*node
= this->components
.head
;
960 for (int i
= 0; i
< idx
; i
++) {
963 /* If the end of the list is encountered before the element matching the
964 * requested field is found, return NULL.
966 if (node
->is_tail_sentinel())
970 return (ir_constant
*) node
;
974 ir_constant::copy_offset(ir_constant
*src
, int offset
)
976 switch (this->type
->base_type
) {
979 case GLSL_TYPE_FLOAT
:
980 case GLSL_TYPE_BOOL
: {
981 unsigned int size
= src
->type
->components();
982 assert (size
<= this->type
->components() - offset
);
983 for (unsigned int i
=0; i
<size
; i
++) {
984 switch (this->type
->base_type
) {
986 value
.u
[i
+offset
] = src
->get_uint_component(i
);
989 value
.i
[i
+offset
] = src
->get_int_component(i
);
991 case GLSL_TYPE_FLOAT
:
992 value
.f
[i
+offset
] = src
->get_float_component(i
);
995 value
.b
[i
+offset
] = src
->get_bool_component(i
);
997 default: // Shut up the compiler
1004 case GLSL_TYPE_STRUCT
: {
1005 assert (src
->type
== this->type
);
1006 this->components
.make_empty();
1007 foreach_list(node
, &src
->components
) {
1008 ir_constant
*const orig
= (ir_constant
*) node
;
1010 this->components
.push_tail(orig
->clone(this, NULL
));
1015 case GLSL_TYPE_ARRAY
: {
1016 assert (src
->type
== this->type
);
1017 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
1018 this->array_elements
[i
] = src
->array_elements
[i
]->clone(this, NULL
);
1024 assert(!"Should not get here.");
1030 ir_constant::copy_masked_offset(ir_constant
*src
, int offset
, unsigned int mask
)
1032 assert (!type
->is_array() && !type
->is_record());
1034 if (!type
->is_vector() && !type
->is_matrix()) {
1040 for (int i
=0; i
<4; i
++) {
1041 if (mask
& (1 << i
)) {
1042 switch (this->type
->base_type
) {
1043 case GLSL_TYPE_UINT
:
1044 value
.u
[i
+offset
] = src
->get_uint_component(id
++);
1047 value
.i
[i
+offset
] = src
->get_int_component(id
++);
1049 case GLSL_TYPE_FLOAT
:
1050 value
.f
[i
+offset
] = src
->get_float_component(id
++);
1052 case GLSL_TYPE_BOOL
:
1053 value
.b
[i
+offset
] = src
->get_bool_component(id
++);
1056 assert(!"Should not get here.");
1064 ir_constant::has_value(const ir_constant
*c
) const
1066 if (this->type
!= c
->type
)
1069 if (this->type
->is_array()) {
1070 for (unsigned i
= 0; i
< this->type
->length
; i
++) {
1071 if (!this->array_elements
[i
]->has_value(c
->array_elements
[i
]))
1077 if (this->type
->base_type
== GLSL_TYPE_STRUCT
) {
1078 const exec_node
*a_node
= this->components
.head
;
1079 const exec_node
*b_node
= c
->components
.head
;
1081 while (!a_node
->is_tail_sentinel()) {
1082 assert(!b_node
->is_tail_sentinel());
1084 const ir_constant
*const a_field
= (ir_constant
*) a_node
;
1085 const ir_constant
*const b_field
= (ir_constant
*) b_node
;
1087 if (!a_field
->has_value(b_field
))
1090 a_node
= a_node
->next
;
1091 b_node
= b_node
->next
;
1097 for (unsigned i
= 0; i
< this->type
->components(); i
++) {
1098 switch (this->type
->base_type
) {
1099 case GLSL_TYPE_UINT
:
1100 if (this->value
.u
[i
] != c
->value
.u
[i
])
1104 if (this->value
.i
[i
] != c
->value
.i
[i
])
1107 case GLSL_TYPE_FLOAT
:
1108 if (this->value
.f
[i
] != c
->value
.f
[i
])
1111 case GLSL_TYPE_BOOL
:
1112 if (this->value
.b
[i
] != c
->value
.b
[i
])
1116 assert(!"Should not get here.");
1125 ir_constant::is_zero() const
1127 if (!this->type
->is_scalar() && !this->type
->is_vector())
1130 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1131 switch (this->type
->base_type
) {
1132 case GLSL_TYPE_FLOAT
:
1133 if (this->value
.f
[c
] != 0.0)
1137 if (this->value
.i
[c
] != 0)
1140 case GLSL_TYPE_UINT
:
1141 if (this->value
.u
[c
] != 0)
1144 case GLSL_TYPE_BOOL
:
1145 if (this->value
.b
[c
] != false)
1149 /* The only other base types are structures, arrays, and samplers.
1150 * Samplers cannot be constants, and the others should have been
1151 * filtered out above.
1153 assert(!"Should not get here.");
1162 ir_constant::is_one() const
1164 if (!this->type
->is_scalar() && !this->type
->is_vector())
1167 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1168 switch (this->type
->base_type
) {
1169 case GLSL_TYPE_FLOAT
:
1170 if (this->value
.f
[c
] != 1.0)
1174 if (this->value
.i
[c
] != 1)
1177 case GLSL_TYPE_UINT
:
1178 if (this->value
.u
[c
] != 1)
1181 case GLSL_TYPE_BOOL
:
1182 if (this->value
.b
[c
] != true)
1186 /* The only other base types are structures, arrays, and samplers.
1187 * Samplers cannot be constants, and the others should have been
1188 * filtered out above.
1190 assert(!"Should not get here.");
1199 ir_constant::is_negative_one() const
1201 if (!this->type
->is_scalar() && !this->type
->is_vector())
1204 if (this->type
->is_boolean())
1207 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1208 switch (this->type
->base_type
) {
1209 case GLSL_TYPE_FLOAT
:
1210 if (this->value
.f
[c
] != -1.0)
1214 if (this->value
.i
[c
] != -1)
1217 case GLSL_TYPE_UINT
:
1218 if (int(this->value
.u
[c
]) != -1)
1222 /* The only other base types are structures, arrays, samplers, and
1223 * booleans. Samplers cannot be constants, and the others should
1224 * have been filtered out above.
1226 assert(!"Should not get here.");
1235 ir_constant::is_basis() const
1237 if (!this->type
->is_scalar() && !this->type
->is_vector())
1240 if (this->type
->is_boolean())
1244 for (unsigned c
= 0; c
< this->type
->vector_elements
; c
++) {
1245 switch (this->type
->base_type
) {
1246 case GLSL_TYPE_FLOAT
:
1247 if (this->value
.f
[c
] == 1.0)
1249 else if (this->value
.f
[c
] != 0.0)
1253 if (this->value
.i
[c
] == 1)
1255 else if (this->value
.i
[c
] != 0)
1258 case GLSL_TYPE_UINT
:
1259 if (int(this->value
.u
[c
]) == 1)
1261 else if (int(this->value
.u
[c
]) != 0)
1265 /* The only other base types are structures, arrays, samplers, and
1266 * booleans. Samplers cannot be constants, and the others should
1267 * have been filtered out above.
1269 assert(!"Should not get here.");
1279 this->ir_type
= ir_type_loop
;
1280 this->cmp
= ir_unop_neg
;
1283 this->increment
= NULL
;
1284 this->counter
= NULL
;
1288 ir_dereference_variable::ir_dereference_variable(ir_variable
*var
)
1290 assert(var
!= NULL
);
1292 this->ir_type
= ir_type_dereference_variable
;
1294 this->type
= var
->type
;
1298 ir_dereference_array::ir_dereference_array(ir_rvalue
*value
,
1299 ir_rvalue
*array_index
)
1301 this->ir_type
= ir_type_dereference_array
;
1302 this->array_index
= array_index
;
1303 this->set_array(value
);
1307 ir_dereference_array::ir_dereference_array(ir_variable
*var
,
1308 ir_rvalue
*array_index
)
1310 void *ctx
= ralloc_parent(var
);
1312 this->ir_type
= ir_type_dereference_array
;
1313 this->array_index
= array_index
;
1314 this->set_array(new(ctx
) ir_dereference_variable(var
));
1319 ir_dereference_array::set_array(ir_rvalue
*value
)
1321 assert(value
!= NULL
);
1323 this->array
= value
;
1325 const glsl_type
*const vt
= this->array
->type
;
1327 if (vt
->is_array()) {
1328 type
= vt
->element_type();
1329 } else if (vt
->is_matrix()) {
1330 type
= vt
->column_type();
1331 } else if (vt
->is_vector()) {
1332 type
= vt
->get_base_type();
1337 ir_dereference_record::ir_dereference_record(ir_rvalue
*value
,
1340 assert(value
!= NULL
);
1342 this->ir_type
= ir_type_dereference_record
;
1343 this->record
= value
;
1344 this->field
= ralloc_strdup(this, field
);
1345 this->type
= this->record
->type
->field_type(field
);
1349 ir_dereference_record::ir_dereference_record(ir_variable
*var
,
1352 void *ctx
= ralloc_parent(var
);
1354 this->ir_type
= ir_type_dereference_record
;
1355 this->record
= new(ctx
) ir_dereference_variable(var
);
1356 this->field
= ralloc_strdup(this, field
);
1357 this->type
= this->record
->type
->field_type(field
);
1361 ir_dereference::is_lvalue() const
1363 ir_variable
*var
= this->variable_referenced();
1365 /* Every l-value derference chain eventually ends in a variable.
1367 if ((var
== NULL
) || var
->read_only
)
1370 /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec:
1372 * "Samplers cannot be treated as l-values; hence cannot be used
1373 * as out or inout function parameters, nor can they be
1376 if (this->type
->contains_sampler())
1383 static const char *tex_opcode_strs
[] = { "tex", "txb", "txl", "txd", "txf", "txf_ms", "txs", "lod", "tg4", "query_levels" };
1385 const char *ir_texture::opcode_string()
1387 assert((unsigned int) op
<=
1388 sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]));
1389 return tex_opcode_strs
[op
];
1393 ir_texture::get_opcode(const char *str
)
1395 const int count
= sizeof(tex_opcode_strs
) / sizeof(tex_opcode_strs
[0]);
1396 for (int op
= 0; op
< count
; op
++) {
1397 if (strcmp(str
, tex_opcode_strs
[op
]) == 0)
1398 return (ir_texture_opcode
) op
;
1400 return (ir_texture_opcode
) -1;
1405 ir_texture::set_sampler(ir_dereference
*sampler
, const glsl_type
*type
)
1407 assert(sampler
!= NULL
);
1408 assert(type
!= NULL
);
1409 this->sampler
= sampler
;
1412 if (this->op
== ir_txs
|| this->op
== ir_query_levels
) {
1413 assert(type
->base_type
== GLSL_TYPE_INT
);
1414 } else if (this->op
== ir_lod
) {
1415 assert(type
->vector_elements
== 2);
1416 assert(type
->base_type
== GLSL_TYPE_FLOAT
);
1418 assert(sampler
->type
->sampler_type
== (int) type
->base_type
);
1419 if (sampler
->type
->sampler_shadow
)
1420 assert(type
->vector_elements
== 4 || type
->vector_elements
== 1);
1422 assert(type
->vector_elements
== 4);
1428 ir_swizzle::init_mask(const unsigned *comp
, unsigned count
)
1430 assert((count
>= 1) && (count
<= 4));
1432 memset(&this->mask
, 0, sizeof(this->mask
));
1433 this->mask
.num_components
= count
;
1435 unsigned dup_mask
= 0;
1438 assert(comp
[3] <= 3);
1439 dup_mask
|= (1U << comp
[3])
1440 & ((1U << comp
[0]) | (1U << comp
[1]) | (1U << comp
[2]));
1441 this->mask
.w
= comp
[3];
1444 assert(comp
[2] <= 3);
1445 dup_mask
|= (1U << comp
[2])
1446 & ((1U << comp
[0]) | (1U << comp
[1]));
1447 this->mask
.z
= comp
[2];
1450 assert(comp
[1] <= 3);
1451 dup_mask
|= (1U << comp
[1])
1452 & ((1U << comp
[0]));
1453 this->mask
.y
= comp
[1];
1456 assert(comp
[0] <= 3);
1457 this->mask
.x
= comp
[0];
1460 this->mask
.has_duplicates
= dup_mask
!= 0;
1462 /* Based on the number of elements in the swizzle and the base type
1463 * (i.e., float, int, unsigned, or bool) of the vector being swizzled,
1464 * generate the type of the resulting value.
1466 type
= glsl_type::get_instance(val
->type
->base_type
, mask
.num_components
, 1);
1469 ir_swizzle::ir_swizzle(ir_rvalue
*val
, unsigned x
, unsigned y
, unsigned z
,
1470 unsigned w
, unsigned count
)
1473 const unsigned components
[4] = { x
, y
, z
, w
};
1474 this->ir_type
= ir_type_swizzle
;
1475 this->init_mask(components
, count
);
1478 ir_swizzle::ir_swizzle(ir_rvalue
*val
, const unsigned *comp
,
1482 this->ir_type
= ir_type_swizzle
;
1483 this->init_mask(comp
, count
);
1486 ir_swizzle::ir_swizzle(ir_rvalue
*val
, ir_swizzle_mask mask
)
1488 this->ir_type
= ir_type_swizzle
;
1491 this->type
= glsl_type::get_instance(val
->type
->base_type
,
1492 mask
.num_components
, 1);
1501 ir_swizzle::create(ir_rvalue
*val
, const char *str
, unsigned vector_length
)
1503 void *ctx
= ralloc_parent(val
);
1505 /* For each possible swizzle character, this table encodes the value in
1506 * \c idx_map that represents the 0th element of the vector. For invalid
1507 * swizzle characters (e.g., 'k'), a special value is used that will allow
1508 * detection of errors.
1510 static const unsigned char base_idx
[26] = {
1511 /* a b c d e f g h i j k l m */
1512 R
, R
, I
, I
, I
, I
, R
, I
, I
, I
, I
, I
, I
,
1513 /* n o p q r s t u v w x y z */
1514 I
, I
, S
, S
, R
, S
, S
, I
, I
, X
, X
, X
, X
1517 /* Each valid swizzle character has an entry in the previous table. This
1518 * table encodes the base index encoded in the previous table plus the actual
1519 * index of the swizzle character. When processing swizzles, the first
1520 * character in the string is indexed in the previous table. Each character
1521 * in the string is indexed in this table, and the value found there has the
1522 * value form the first table subtracted. The result must be on the range
1525 * For example, the string "wzyx" will get X from the first table. Each of
1526 * the charcaters will get X+3, X+2, X+1, and X+0 from this table. After
1527 * subtraction, the swizzle values are { 3, 2, 1, 0 }.
1529 * The string "wzrg" will get X from the first table. Each of the characters
1530 * will get X+3, X+2, R+0, and R+1 from this table. After subtraction, the
1531 * swizzle values are { 3, 2, 4, 5 }. Since 4 and 5 are outside the range
1532 * [0,3], the error is detected.
1534 static const unsigned char idx_map
[26] = {
1535 /* a b c d e f g h i j k l m */
1536 R
+3, R
+2, 0, 0, 0, 0, R
+1, 0, 0, 0, 0, 0, 0,
1537 /* n o p q r s t u v w x y z */
1538 0, 0, S
+2, S
+3, R
+0, S
+0, S
+1, 0, 0, X
+3, X
+0, X
+1, X
+2
1541 int swiz_idx
[4] = { 0, 0, 0, 0 };
1545 /* Validate the first character in the swizzle string and look up the base
1546 * index value as described above.
1548 if ((str
[0] < 'a') || (str
[0] > 'z'))
1551 const unsigned base
= base_idx
[str
[0] - 'a'];
1554 for (i
= 0; (i
< 4) && (str
[i
] != '\0'); i
++) {
1555 /* Validate the next character, and, as described above, convert it to a
1558 if ((str
[i
] < 'a') || (str
[i
] > 'z'))
1561 swiz_idx
[i
] = idx_map
[str
[i
] - 'a'] - base
;
1562 if ((swiz_idx
[i
] < 0) || (swiz_idx
[i
] >= (int) vector_length
))
1569 return new(ctx
) ir_swizzle(val
, swiz_idx
[0], swiz_idx
[1], swiz_idx
[2],
1579 ir_swizzle::variable_referenced() const
1581 return this->val
->variable_referenced();
1585 ir_variable::ir_variable(const struct glsl_type
*type
, const char *name
,
1586 ir_variable_mode mode
)
1587 : max_array_access(0), max_ifc_array_access(NULL
),
1588 read_only(false), centroid(false), invariant(false),
1589 how_declared(ir_var_declared_normally
), mode(mode
),
1590 interpolation(INTERP_QUALIFIER_NONE
), atomic()
1592 this->ir_type
= ir_type_variable
;
1594 this->name
= ralloc_strdup(this, name
);
1595 this->explicit_location
= false;
1596 this->has_initializer
= false;
1597 this->location
= -1;
1598 this->location_frac
= 0;
1599 this->warn_extension
= NULL
;
1600 this->constant_value
= NULL
;
1601 this->constant_initializer
= NULL
;
1602 this->origin_upper_left
= false;
1603 this->pixel_center_integer
= false;
1604 this->depth_layout
= ir_depth_layout_none
;
1608 if (type
->base_type
== GLSL_TYPE_SAMPLER
)
1609 this->read_only
= true;
1611 if (type
->is_interface())
1612 this->init_interface_type(type
);
1613 else if (type
->is_array() && type
->fields
.array
->is_interface())
1614 this->init_interface_type(type
->fields
.array
);
1620 interpolation_string(unsigned interpolation
)
1622 switch (interpolation
) {
1623 case INTERP_QUALIFIER_NONE
: return "no";
1624 case INTERP_QUALIFIER_SMOOTH
: return "smooth";
1625 case INTERP_QUALIFIER_FLAT
: return "flat";
1626 case INTERP_QUALIFIER_NOPERSPECTIVE
: return "noperspective";
1629 assert(!"Should not get here.");
1634 glsl_interp_qualifier
1635 ir_variable::determine_interpolation_mode(bool flat_shade
)
1637 if (this->interpolation
!= INTERP_QUALIFIER_NONE
)
1638 return (glsl_interp_qualifier
) this->interpolation
;
1639 int location
= this->location
;
1641 location
== VARYING_SLOT_COL0
|| location
== VARYING_SLOT_COL1
;
1642 if (flat_shade
&& is_gl_Color
)
1643 return INTERP_QUALIFIER_FLAT
;
1645 return INTERP_QUALIFIER_SMOOTH
;
1649 ir_function_signature::ir_function_signature(const glsl_type
*return_type
,
1650 builtin_available_predicate b
)
1651 : return_type(return_type
), is_defined(false), is_intrinsic(false),
1652 builtin_avail(b
), _function(NULL
)
1654 this->ir_type
= ir_type_function_signature
;
1655 this->origin
= NULL
;
1660 ir_function_signature::is_builtin() const
1662 return builtin_avail
!= NULL
;
1667 ir_function_signature::is_builtin_available(const _mesa_glsl_parse_state
*state
) const
1669 /* We can't call the predicate without a state pointer, so just say that
1670 * the signature is available. At compile time, we need the filtering,
1671 * but also receive a valid state pointer. At link time, we're resolving
1672 * imported built-in prototypes to their definitions, which will always
1673 * be an exact match. So we can skip the filtering.
1678 assert(builtin_avail
!= NULL
);
1679 return builtin_avail(state
);
1684 modes_match(unsigned a
, unsigned b
)
1689 /* Accept "in" vs. "const in" */
1690 if ((a
== ir_var_const_in
&& b
== ir_var_function_in
) ||
1691 (b
== ir_var_const_in
&& a
== ir_var_function_in
))
1699 ir_function_signature::qualifiers_match(exec_list
*params
)
1701 exec_list_iterator iter_a
= parameters
.iterator();
1702 exec_list_iterator iter_b
= params
->iterator();
1704 /* check that the qualifiers match. */
1705 while (iter_a
.has_next()) {
1706 ir_variable
*a
= (ir_variable
*)iter_a
.get();
1707 ir_variable
*b
= (ir_variable
*)iter_b
.get();
1709 if (a
->read_only
!= b
->read_only
||
1710 !modes_match(a
->mode
, b
->mode
) ||
1711 a
->interpolation
!= b
->interpolation
||
1712 a
->centroid
!= b
->centroid
) {
1714 /* parameter a's qualifiers don't match */
1726 ir_function_signature::replace_parameters(exec_list
*new_params
)
1728 /* Destroy all of the previous parameter information. If the previous
1729 * parameter information comes from the function prototype, it may either
1730 * specify incorrect parameter names or not have names at all.
1732 foreach_iter(exec_list_iterator
, iter
, parameters
) {
1733 assert(((ir_instruction
*) iter
.get())->as_variable() != NULL
);
1738 new_params
->move_nodes_to(¶meters
);
1742 ir_function::ir_function(const char *name
)
1744 this->ir_type
= ir_type_function
;
1745 this->name
= ralloc_strdup(this, name
);
1750 ir_function::has_user_signature()
1752 foreach_list(n
, &this->signatures
) {
1753 ir_function_signature
*const sig
= (ir_function_signature
*) n
;
1754 if (!sig
->is_builtin())
1762 ir_rvalue::error_value(void *mem_ctx
)
1764 ir_rvalue
*v
= new(mem_ctx
) ir_rvalue
;
1766 v
->type
= glsl_type::error_type
;
1772 visit_exec_list(exec_list
*list
, ir_visitor
*visitor
)
1774 foreach_iter(exec_list_iterator
, iter
, *list
) {
1775 ((ir_instruction
*)iter
.get())->accept(visitor
);
1781 steal_memory(ir_instruction
*ir
, void *new_ctx
)
1783 ir_variable
*var
= ir
->as_variable();
1784 ir_constant
*constant
= ir
->as_constant();
1785 if (var
!= NULL
&& var
->constant_value
!= NULL
)
1786 steal_memory(var
->constant_value
, ir
);
1788 if (var
!= NULL
&& var
->constant_initializer
!= NULL
)
1789 steal_memory(var
->constant_initializer
, ir
);
1791 /* The components of aggregate constants are not visited by the normal
1792 * visitor, so steal their values by hand.
1794 if (constant
!= NULL
) {
1795 if (constant
->type
->is_record()) {
1796 foreach_iter(exec_list_iterator
, iter
, constant
->components
) {
1797 ir_constant
*field
= (ir_constant
*)iter
.get();
1798 steal_memory(field
, ir
);
1800 } else if (constant
->type
->is_array()) {
1801 for (unsigned int i
= 0; i
< constant
->type
->length
; i
++) {
1802 steal_memory(constant
->array_elements
[i
], ir
);
1807 ralloc_steal(new_ctx
, ir
);
1812 reparent_ir(exec_list
*list
, void *mem_ctx
)
1814 foreach_list(node
, list
) {
1815 visit_tree((ir_instruction
*) node
, steal_memory
, mem_ctx
);
1821 try_min_one(ir_rvalue
*ir
)
1823 ir_expression
*expr
= ir
->as_expression();
1825 if (!expr
|| expr
->operation
!= ir_binop_min
)
1828 if (expr
->operands
[0]->is_one())
1829 return expr
->operands
[1];
1831 if (expr
->operands
[1]->is_one())
1832 return expr
->operands
[0];
1838 try_max_zero(ir_rvalue
*ir
)
1840 ir_expression
*expr
= ir
->as_expression();
1842 if (!expr
|| expr
->operation
!= ir_binop_max
)
1845 if (expr
->operands
[0]->is_zero())
1846 return expr
->operands
[1];
1848 if (expr
->operands
[1]->is_zero())
1849 return expr
->operands
[0];
1855 ir_rvalue::as_rvalue_to_saturate()
1857 ir_expression
*expr
= this->as_expression();
1862 ir_rvalue
*max_zero
= try_max_zero(expr
);
1864 return try_min_one(max_zero
);
1866 ir_rvalue
*min_one
= try_min_one(expr
);
1868 return try_max_zero(min_one
);
1877 vertices_per_prim(GLenum prim
)
1886 case GL_LINES_ADJACENCY
:
1888 case GL_TRIANGLES_ADJACENCY
:
1891 assert(!"Bad primitive");
1897 * Generate a string describing the mode of a variable
1900 mode_string(const ir_variable
*var
)
1902 switch (var
->mode
) {
1904 return (var
->read_only
) ? "global constant" : "global variable";
1906 case ir_var_uniform
:
1909 case ir_var_shader_in
:
1910 return "shader input";
1912 case ir_var_shader_out
:
1913 return "shader output";
1915 case ir_var_function_in
:
1916 case ir_var_const_in
:
1917 return "function input";
1919 case ir_var_function_out
:
1920 return "function output";
1922 case ir_var_function_inout
:
1923 return "function inout";
1925 case ir_var_system_value
:
1926 return "shader input";
1928 case ir_var_temporary
:
1929 return "compiler temporary";
1931 case ir_var_mode_count
:
1935 assert(!"Should not get here.");
1936 return "invalid variable";