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25 * \file ir_constant_folding.cpp
26 * Replace constant-valued expressions with references to constant values.
31 #include "ir_visitor.h"
32 #include "ir_constant_folding.h"
33 #include "glsl_types.h"
36 * Visitor class for replacing expressions with ir_constant values.
40 ir_constant_folding_visitor::visit(ir_variable
*ir
)
47 ir_constant_folding_visitor::visit(ir_label
*ir
)
54 ir_constant_folding_visitor::visit(ir_function_signature
*ir
)
61 ir_constant_folding_visitor::visit(ir_function
*ir
)
67 ir_constant_folding_visitor::visit(ir_expression
*ir
)
72 for (operand
= 0; operand
< ir
->get_num_operands(); operand
++) {
73 op
[operand
] = ir
->operands
[operand
]->constant_expression_value();
75 ir
->operands
[operand
] = op
[operand
];
82 ir_constant_folding_visitor::visit(ir_swizzle
*ir
)
89 ir_constant_folding_visitor::visit(ir_dereference
*ir
)
91 if (ir
->mode
== ir_dereference::ir_reference_array
) {
92 ir_constant
*const_val
= ir
->selector
.array_index
->constant_expression_value();
94 ir
->selector
.array_index
= const_val
;
96 ir
->selector
.array_index
->accept(this);
98 ir
->var
->accept(this);
103 ir_constant_folding_visitor::visit(ir_assignment
*ir
)
105 ir_constant
*const_val
= ir
->rhs
->constant_expression_value();
109 ir
->rhs
->accept(this);
114 ir_constant_folding_visitor::visit(ir_constant
*ir
)
121 ir_constant_folding_visitor::visit(ir_call
*ir
)
128 ir_constant_folding_visitor::visit(ir_return
*ir
)
135 ir_constant_folding_visitor::visit(ir_if
*ir
)
137 ir_constant
*const_val
= ir
->condition
->constant_expression_value();
139 ir
->condition
= const_val
;
141 ir
->condition
->accept(this);