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25 * \file ir_import_prototypes.cpp
26 * Import function prototypes from one IR tree into another.
28 * \author Ian Romanick
32 #include "glsl_symbol_table.h"
35 * Visitor used to import function prototypes
37 * Normally the \c clone method of either \c ir_function or
38 * \c ir_function_signature could be used. However, we don't want a complete
39 * clone of the \c ir_function_signature. We want everything \b except the
40 * body of the function.
42 class import_prototype_visitor
: public ir_hierarchical_visitor
{
46 import_prototype_visitor(exec_list
*list
, glsl_symbol_table
*symbols
,
49 this->mem_ctx
= mem_ctx
;
51 this->symbols
= symbols
;
52 this->function
= NULL
;
55 virtual ir_visitor_status
visit_enter(ir_function
*ir
)
57 assert(this->function
== NULL
);
59 this->function
= this->symbols
->get_function(ir
->name
);
60 if (!this->function
) {
61 this->function
= new(this->mem_ctx
) ir_function(ir
->name
);
62 this->function
->is_builtin
= ir
->is_builtin
;
64 list
->push_tail(this->function
);
66 /* Add the new function to the symbol table.
68 this->symbols
->add_function(this->function
->name
, this->function
);
70 return visit_continue
;
73 virtual ir_visitor_status
visit_leave(ir_function
*ir
)
76 assert(this->function
!= NULL
);
78 this->function
= NULL
;
79 return visit_continue
;
82 ir_visitor_status
visit_enter(ir_function_signature
*ir
)
84 assert(this->function
!= NULL
);
86 ir_function_signature
*copy
=
87 new(mem_ctx
) ir_function_signature(ir
->return_type
);
89 copy
->is_defined
= false;
91 /* Clone the parameter list, but NOT the body.
93 foreach_list_const(node
, &ir
->parameters
) {
94 const ir_variable
*const param
= (const ir_variable
*) node
;
96 assert(const_cast<ir_variable
*>(param
)->as_variable() != NULL
);
98 ir_variable
*const param_copy
= param
->clone(mem_ctx
, NULL
);
99 copy
->parameters
.push_tail(param_copy
);
102 this->function
->add_signature(copy
);
104 /* Do not process child nodes of the ir_function_signature. There can
105 * never be any nodes inside the ir_function_signature that we care
106 * about. Instead continue with the next sibling.
108 return visit_continue_with_parent
;
113 ir_function
*function
;
114 glsl_symbol_table
*symbols
;
120 * Import function prototypes from one IR tree into another
122 * \param source Source instruction stream containing functions whose
123 * prototypes are to be imported
124 * \param dest Destination instruction stream where new \c ir_function and
125 * \c ir_function_signature nodes will be stored
126 * \param symbols Symbol table where new functions will be stored
127 * \param mem_ctx talloc memory context used for new allocations
130 import_prototypes(const exec_list
*source
, exec_list
*dest
,
131 glsl_symbol_table
*symbols
, void *mem_ctx
)
133 import_prototype_visitor
v(dest
, symbols
, mem_ctx
);
135 /* Making source be const is just extra documentation.
137 v
.run(const_cast<exec_list
*>(source
));