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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"
34 * Visitor used to import function prototypes
36 * Normally the \c clone method of either \c ir_function or
37 * \c ir_function_signature could be used. However, we don't want a complete
38 * clone of the \c ir_function_signature. We want everything \b except the
39 * body of the function.
41 class import_prototype_visitor : public ir_hierarchical_visitor {
45 import_prototype_visitor(exec_list *list, glsl_symbol_table *symbols,
48 this->mem_ctx = mem_ctx;
50 this->symbols = symbols;
51 this->function = NULL;
54 virtual ir_visitor_status visit_enter(ir_function *ir)
56 assert(this->function == NULL);
58 this->function = this->symbols->get_function(ir->name);
59 if (!this->function) {
60 this->function = new(this->mem_ctx) ir_function(ir->name);
62 list->push_tail(this->function);
64 /* Add the new function to the symbol table.
66 this->symbols->add_function(this->function);
68 return visit_continue;
71 virtual ir_visitor_status visit_leave(ir_function *ir)
74 assert(this->function != NULL);
76 this->function = NULL;
77 return visit_continue;
80 ir_visitor_status visit_enter(ir_function_signature *ir)
82 assert(this->function != NULL);
84 ir_function_signature *copy = ir->clone_prototype(mem_ctx, NULL);
86 this->function->add_signature(copy);
88 /* Do not process child nodes of the ir_function_signature. There can
89 * never be any nodes inside the ir_function_signature that we care
90 * about. Instead continue with the next sibling.
92 return visit_continue_with_parent;
97 ir_function *function;
98 glsl_symbol_table *symbols;
104 * Import function prototypes from one IR tree into another
106 * \param source Source instruction stream containing functions whose
107 * prototypes are to be imported
108 * \param dest Destination instruction stream where new \c ir_function and
109 * \c ir_function_signature nodes will be stored
110 * \param symbols Symbol table where new functions will be stored
111 * \param mem_ctx ralloc memory context used for new allocations
114 import_prototypes(const exec_list *source, exec_list *dest,
115 glsl_symbol_table *symbols, void *mem_ctx)
117 import_prototype_visitor v(dest, symbols, mem_ctx);
119 /* Making source be const is just extra documentation.
121 v.run(const_cast<exec_list *>(source));