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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
);
63 list
->push_tail(this->function
);
65 /* Add the new function to the symbol table.
67 this->symbols
->add_function(this->function
);
69 return visit_continue
;
72 virtual ir_visitor_status
visit_leave(ir_function
*ir
)
75 assert(this->function
!= NULL
);
77 this->function
= NULL
;
78 return visit_continue
;
81 ir_visitor_status
visit_enter(ir_function_signature
*ir
)
83 assert(this->function
!= NULL
);
85 ir_function_signature
*copy
= ir
->clone_prototype(mem_ctx
, NULL
);
87 this->function
->add_signature(copy
);
89 /* Do not process child nodes of the ir_function_signature. There can
90 * never be any nodes inside the ir_function_signature that we care
91 * about. Instead continue with the next sibling.
93 return visit_continue_with_parent
;
98 ir_function
*function
;
99 glsl_symbol_table
*symbols
;
105 * Import function prototypes from one IR tree into another
107 * \param source Source instruction stream containing functions whose
108 * prototypes are to be imported
109 * \param dest Destination instruction stream where new \c ir_function and
110 * \c ir_function_signature nodes will be stored
111 * \param symbols Symbol table where new functions will be stored
112 * \param mem_ctx talloc memory context used for new allocations
115 import_prototypes(const exec_list
*source
, exec_list
*dest
,
116 glsl_symbol_table
*symbols
, void *mem_ctx
)
118 import_prototype_visitor
v(dest
, symbols
, mem_ctx
);
120 /* Making source be const is just extra documentation.
122 v
.run(const_cast<exec_list
*>(source
));