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25 * \file ir_import_prototypes.cpp
26 * Import function prototypes from one IR tree into another.
28 * \author Ian Romanick
31 #include "glsl_symbol_table.h"
36 * Visitor used to import function prototypes
38 * Normally the \c clone method of either \c ir_function or
39 * \c ir_function_signature could be used. However, we don't want a complete
40 * clone of the \c ir_function_signature. We want everything \b except the
41 * body of the function.
43 class import_prototype_visitor
: public ir_hierarchical_visitor
{
47 import_prototype_visitor(exec_list
*list
, glsl_symbol_table
*symbols
,
50 this->mem_ctx
= mem_ctx
;
52 this->symbols
= symbols
;
53 this->function
= NULL
;
56 virtual ir_visitor_status
visit_enter(ir_function
*ir
)
58 assert(this->function
== NULL
);
60 this->function
= this->symbols
->get_function(ir
->name
);
61 if (!this->function
) {
62 this->function
= new(this->mem_ctx
) ir_function(ir
->name
);
64 list
->push_tail(this->function
);
66 /* Add the new function to the symbol table.
68 this->symbols
->add_function(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
= ir
->clone_prototype(mem_ctx
, NULL
);
88 this->function
->add_signature(copy
);
90 /* Do not process child nodes of the ir_function_signature. There can
91 * never be any nodes inside the ir_function_signature that we care
92 * about. Instead continue with the next sibling.
94 return visit_continue_with_parent
;
99 ir_function
*function
;
100 glsl_symbol_table
*symbols
;
104 } /* anonymous namespace */
107 * Import function prototypes from one IR tree into another
109 * \param source Source instruction stream containing functions whose
110 * prototypes are to be imported
111 * \param dest Destination instruction stream where new \c ir_function and
112 * \c ir_function_signature nodes will be stored
113 * \param symbols Symbol table where new functions will be stored
114 * \param mem_ctx ralloc memory context used for new allocations
117 import_prototypes(const exec_list
*source
, exec_list
*dest
,
118 glsl_symbol_table
*symbols
, void *mem_ctx
)
120 import_prototype_visitor
v(dest
, symbols
, mem_ctx
);
122 /* Making source be const is just extra documentation.
124 v
.run(const_cast<exec_list
*>(source
));