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9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
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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,
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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 _mesa_hash_table_insert(ht
, h
, var
->get_interface_type()->name
,
53 link_uniform_block_active
*const b
=
54 (link_uniform_block_active
*) existing_block
->data
;
56 if (b
->type
!= block_type
57 || b
->has_instance_name
!= var
->is_interface_instance())
63 assert(!"Should not get here.");
68 link_uniform_block_active_visitor::visit_enter(ir_dereference_array
*ir
)
70 ir_dereference_variable
*const d
= ir
->array
->as_dereference_variable();
71 ir_variable
*const var
= (d
== NULL
) ? NULL
: d
->var
;
73 /* If the r-value being dereferenced is not a variable (e.g., a field of a
74 * structure) or is not a uniform block instance, continue.
76 * WARNING: It is not enough for the variable to be part of uniform block.
77 * It must represent the entire block. Arrays (or matrices) inside blocks
78 * that lack an instance name are handled by the ir_dereference_variable
82 || !var
->is_in_uniform_block()
83 || !var
->is_interface_instance())
84 return visit_continue
;
86 /* Process the block. Bail if there was an error.
88 link_uniform_block_active
*const b
=
89 process_block(this->mem_ctx
, this->ht
, var
);
92 "uniform block `%s' has mismatching definitions",
93 var
->get_interface_type()->name
);
94 this->success
= false;
98 /* Block arrays must be declared with an instance name.
100 assert(b
->has_instance_name
);
101 assert((b
->num_array_elements
== 0) == (b
->array_elements
== NULL
));
102 assert(b
->type
!= NULL
);
104 /* Determine whether or not this array index has already been added to the
105 * list of active array indices. At this point all constant folding must
106 * have occured, and the array index must be a constant.
108 ir_constant
*c
= ir
->array_index
->as_constant();
111 const unsigned idx
= c
->get_uint_component(0);
114 for (i
= 0; i
< b
->num_array_elements
; i
++) {
115 if (b
->array_elements
[i
] == idx
)
119 assert(i
<= b
->num_array_elements
);
121 if (i
== b
->num_array_elements
) {
122 b
->array_elements
= reralloc(this->mem_ctx
,
125 b
->num_array_elements
+ 1);
127 b
->array_elements
[b
->num_array_elements
] = idx
;
129 b
->num_array_elements
++;
132 return visit_continue_with_parent
;
136 link_uniform_block_active_visitor::visit(ir_dereference_variable
*ir
)
138 ir_variable
*var
= ir
->var
;
140 if (!var
->is_in_uniform_block())
141 return visit_continue
;
143 assert(!var
->is_interface_instance() || !var
->type
->is_array());
145 /* Process the block. Bail if there was an error.
147 link_uniform_block_active
*const b
=
148 process_block(this->mem_ctx
, this->ht
, var
);
150 linker_error(this->prog
,
151 "uniform block `%s' has mismatching definitions",
152 var
->get_interface_type()->name
);
153 this->success
= false;
157 assert(b
->num_array_elements
== 0);
158 assert(b
->array_elements
== NULL
);
159 assert(b
->type
!= NULL
);
161 return visit_continue
;