2 * Copyright © 2013 Intel Corporation
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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 "ir_builder.h"
25 #include "ir_rvalue_visitor.h"
26 #include "ir_optimization.h"
28 using namespace ir_builder
;
32 class vector_deref_visitor
: public ir_rvalue_enter_visitor
{
34 vector_deref_visitor()
39 virtual ~vector_deref_visitor()
43 virtual void handle_rvalue(ir_rvalue
**rv
);
44 virtual ir_visitor_status
visit_enter(ir_assignment
*ir
);
49 } /* anonymous namespace */
52 vector_deref_visitor::visit_enter(ir_assignment
*ir
)
54 if (!ir
->lhs
|| ir
->lhs
->ir_type
!= ir_type_dereference_array
)
55 return ir_rvalue_enter_visitor::visit_enter(ir
);
57 ir_dereference_array
*const deref
= (ir_dereference_array
*) ir
->lhs
;
58 if (!deref
->array
->type
->is_vector())
59 return ir_rvalue_enter_visitor::visit_enter(ir
);
61 ir_dereference
*const new_lhs
= (ir_dereference
*) deref
->array
;
64 void *mem_ctx
= ralloc_parent(ir
);
65 ir_constant
*old_index_constant
=
66 deref
->array_index
->constant_expression_value(mem_ctx
);
67 if (!old_index_constant
) {
68 ir
->rhs
= new(mem_ctx
) ir_expression(ir_triop_vector_insert
,
70 new_lhs
->clone(mem_ctx
, NULL
),
73 ir
->write_mask
= (1 << new_lhs
->type
->vector_elements
) - 1;
75 ir
->write_mask
= 1 << old_index_constant
->get_int_component(0);
78 return ir_rvalue_enter_visitor::visit_enter(ir
);
82 vector_deref_visitor::handle_rvalue(ir_rvalue
**rv
)
84 if (*rv
== NULL
|| (*rv
)->ir_type
!= ir_type_dereference_array
)
87 ir_dereference_array
*const deref
= (ir_dereference_array
*) *rv
;
88 if (!deref
->array
->type
->is_vector())
91 void *mem_ctx
= ralloc_parent(deref
);
92 *rv
= new(mem_ctx
) ir_expression(ir_binop_vector_extract
,
98 lower_vector_derefs(gl_linked_shader
*shader
)
100 vector_deref_visitor v
;
102 visit_list_elements(&v
, shader
->ir
);