2 * Copyright © 2013 Intel Corporation
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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
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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 "link_uniform_block_active_visitor.h"
27 link_uniform_block_active
*
28 process_block(void *mem_ctx
, struct hash_table
*ht
, ir_variable
*var
)
30 const uint32_t h
= _mesa_hash_string(var
->get_interface_type()->name
);
31 const hash_entry
*const existing_block
=
32 _mesa_hash_table_search(ht
, h
, var
->get_interface_type()->name
);
34 const glsl_type
*const block_type
= var
->is_interface_instance()
35 ? var
->type
: var
->get_interface_type();
38 /* If a block with this block-name has not previously been seen, add it.
39 * If a block with this block-name has been seen, it must be identical to
40 * the block currently being examined.
42 if (existing_block
== NULL
) {
43 link_uniform_block_active
*const b
=
44 rzalloc(mem_ctx
, struct link_uniform_block_active
);
47 b
->has_instance_name
= var
->is_interface_instance();
49 if (var
->data
.explicit_binding
) {
50 b
->has_binding
= true;
51 b
->binding
= var
->data
.binding
;
53 b
->has_binding
= false;
57 _mesa_hash_table_insert(ht
, h
, var
->get_interface_type()->name
,
61 link_uniform_block_active
*const b
=
62 (link_uniform_block_active
*) existing_block
->data
;
64 if (b
->type
!= block_type
65 || b
->has_instance_name
!= var
->is_interface_instance())
71 assert(!"Should not get here.");
76 link_uniform_block_active_visitor::visit_enter(ir_dereference_array
*ir
)
78 ir_dereference_variable
*const d
= ir
->array
->as_dereference_variable();
79 ir_variable
*const var
= (d
== NULL
) ? NULL
: d
->var
;
81 /* If the r-value being dereferenced is not a variable (e.g., a field of a
82 * structure) or is not a uniform block instance, continue.
84 * WARNING: It is not enough for the variable to be part of uniform block.
85 * It must represent the entire block. Arrays (or matrices) inside blocks
86 * that lack an instance name are handled by the ir_dereference_variable
90 || !var
->is_in_uniform_block()
91 || !var
->is_interface_instance())
92 return visit_continue
;
94 /* Process the block. Bail if there was an error.
96 link_uniform_block_active
*const b
=
97 process_block(this->mem_ctx
, this->ht
, var
);
100 "uniform block `%s' has mismatching definitions",
101 var
->get_interface_type()->name
);
102 this->success
= false;
106 /* Block arrays must be declared with an instance name.
108 assert(b
->has_instance_name
);
109 assert((b
->num_array_elements
== 0) == (b
->array_elements
== NULL
));
110 assert(b
->type
!= NULL
);
112 ir_constant
*c
= ir
->array_index
->as_constant();
115 /* Index is a constant, so mark just that element used, if not already */
116 const unsigned idx
= c
->get_uint_component(0);
119 for (i
= 0; i
< b
->num_array_elements
; i
++) {
120 if (b
->array_elements
[i
] == idx
)
124 assert(i
<= b
->num_array_elements
);
126 if (i
== b
->num_array_elements
) {
127 b
->array_elements
= reralloc(this->mem_ctx
,
130 b
->num_array_elements
+ 1);
132 b
->array_elements
[b
->num_array_elements
] = idx
;
134 b
->num_array_elements
++;
137 /* The array index is not a constant, so mark the entire array used. */
138 assert(b
->type
->is_array());
139 if (b
->num_array_elements
< b
->type
->length
) {
140 b
->num_array_elements
= b
->type
->length
;
141 b
->array_elements
= reralloc(this->mem_ctx
,
144 b
->num_array_elements
);
146 for (unsigned i
= 0; i
< b
->num_array_elements
; i
++) {
147 b
->array_elements
[i
] = i
;
152 return visit_continue_with_parent
;
156 link_uniform_block_active_visitor::visit(ir_dereference_variable
*ir
)
158 ir_variable
*var
= ir
->var
;
160 if (!var
->is_in_uniform_block())
161 return visit_continue
;
163 assert(!var
->is_interface_instance() || !var
->type
->is_array());
165 /* Process the block. Bail if there was an error.
167 link_uniform_block_active
*const b
=
168 process_block(this->mem_ctx
, this->ht
, var
);
170 linker_error(this->prog
,
171 "uniform block `%s' has mismatching definitions",
172 var
->get_interface_type()->name
);
173 this->success
= false;
177 assert(b
->num_array_elements
== 0);
178 assert(b
->array_elements
== NULL
);
179 assert(b
->type
!= NULL
);
181 return visit_continue
;