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22 * DEALINGS IN THE SOFTWARE.
25 #include "glsl_symbol_table.h"
27 class symbol_table_entry
{
29 DECLARE_RALLOC_CXX_OPERATORS(symbol_table_entry
);
31 bool add_interface(const glsl_type
*i
, enum ir_variable_mode mode
)
33 const glsl_type
**dest
;
39 case ir_var_shader_in
:
42 case ir_var_shader_out
:
46 assert(!"Unsupported interface variable mode!");
58 const glsl_type
*get_interface(enum ir_variable_mode mode
)
63 case ir_var_shader_in
:
65 case ir_var_shader_out
:
68 assert(!"Unsupported interface variable mode!");
73 symbol_table_entry(ir_variable
*v
) :
74 v(v
), f(0), t(0), ibu(0), ibi(0), ibo(0), a(0) {}
75 symbol_table_entry(ir_function
*f
) :
76 v(0), f(f
), t(0), ibu(0), ibi(0), ibo(0), a(0) {}
77 symbol_table_entry(const glsl_type
*t
) :
78 v(0), f(0), t(t
), ibu(0), ibi(0), ibo(0), a(0) {}
79 symbol_table_entry(const glsl_type
*t
, enum ir_variable_mode mode
) :
80 v(0), f(0), t(0), ibu(0), ibi(0), ibo(0), a(0)
82 assert(t
->is_interface());
83 add_interface(t
, mode
);
85 symbol_table_entry(const class ast_type_specifier
*a
):
86 v(0), f(0), t(0), ibu(0), ibi(0), ibo(0), a(a
) {}
94 const class ast_type_specifier
*a
;
97 glsl_symbol_table::glsl_symbol_table()
99 this->separate_function_namespace
= false;
100 this->table
= _mesa_symbol_table_ctor();
101 this->mem_ctx
= ralloc_context(NULL
);
104 glsl_symbol_table::~glsl_symbol_table()
106 _mesa_symbol_table_dtor(table
);
107 ralloc_free(mem_ctx
);
110 void glsl_symbol_table::push_scope()
112 _mesa_symbol_table_push_scope(table
);
115 void glsl_symbol_table::pop_scope()
117 _mesa_symbol_table_pop_scope(table
);
120 bool glsl_symbol_table::name_declared_this_scope(const char *name
)
122 return _mesa_symbol_table_symbol_scope(table
, -1, name
) == 0;
125 bool glsl_symbol_table::add_variable(ir_variable
*v
)
127 if (this->separate_function_namespace
) {
128 /* In 1.10, functions and variables have separate namespaces. */
129 symbol_table_entry
*existing
= get_entry(v
->name
);
130 if (name_declared_this_scope(v
->name
)) {
131 /* If there's already an existing function (not a constructor!) in
132 * the current scope, just update the existing entry to include 'v'.
134 if (existing
->v
== NULL
&& existing
->t
== NULL
) {
139 /* If not declared at this scope, add a new entry. But if an existing
140 * entry includes a function, propagate that to this block - otherwise
141 * the new variable declaration would shadow the function.
143 symbol_table_entry
*entry
= new(mem_ctx
) symbol_table_entry(v
);
144 if (existing
!= NULL
)
145 entry
->f
= existing
->f
;
146 int added
= _mesa_symbol_table_add_symbol(table
, -1, v
->name
, entry
);
155 symbol_table_entry
*entry
= new(mem_ctx
) symbol_table_entry(v
);
156 return _mesa_symbol_table_add_symbol(table
, -1, v
->name
, entry
) == 0;
159 bool glsl_symbol_table::add_type(const char *name
, const glsl_type
*t
)
161 symbol_table_entry
*entry
= new(mem_ctx
) symbol_table_entry(t
);
162 return _mesa_symbol_table_add_symbol(table
, -1, name
, entry
) == 0;
165 bool glsl_symbol_table::add_interface(const char *name
, const glsl_type
*i
,
166 enum ir_variable_mode mode
)
168 assert(i
->is_interface());
169 symbol_table_entry
*entry
= get_entry(name
);
171 symbol_table_entry
*entry
=
172 new(mem_ctx
) symbol_table_entry(i
, mode
);
173 bool add_interface_symbol_result
=
174 _mesa_symbol_table_add_symbol(table
, -1, name
, entry
) == 0;
175 assert(add_interface_symbol_result
);
176 return add_interface_symbol_result
;
178 return entry
->add_interface(i
, mode
);
182 bool glsl_symbol_table::add_function(ir_function
*f
)
184 if (this->separate_function_namespace
&& name_declared_this_scope(f
->name
)) {
185 /* In 1.10, functions and variables have separate namespaces. */
186 symbol_table_entry
*existing
= get_entry(f
->name
);
187 if ((existing
->f
== NULL
) && (existing
->t
== NULL
)) {
192 symbol_table_entry
*entry
= new(mem_ctx
) symbol_table_entry(f
);
193 return _mesa_symbol_table_add_symbol(table
, -1, f
->name
, entry
) == 0;
196 void glsl_symbol_table::add_global_function(ir_function
*f
)
198 symbol_table_entry
*entry
= new(mem_ctx
) symbol_table_entry(f
);
199 int added
= _mesa_symbol_table_add_global_symbol(table
, -1, f
->name
, entry
);
204 ir_variable
*glsl_symbol_table::get_variable(const char *name
)
206 symbol_table_entry
*entry
= get_entry(name
);
207 return entry
!= NULL
? entry
->v
: NULL
;
210 const glsl_type
*glsl_symbol_table::get_type(const char *name
)
212 symbol_table_entry
*entry
= get_entry(name
);
213 return entry
!= NULL
? entry
->t
: NULL
;
216 const glsl_type
*glsl_symbol_table::get_interface(const char *name
,
217 enum ir_variable_mode mode
)
219 symbol_table_entry
*entry
= get_entry(name
);
220 return entry
!= NULL
? entry
->get_interface(mode
) : NULL
;
223 ir_function
*glsl_symbol_table::get_function(const char *name
)
225 symbol_table_entry
*entry
= get_entry(name
);
226 return entry
!= NULL
? entry
->f
: NULL
;
229 symbol_table_entry
*glsl_symbol_table::get_entry(const char *name
)
231 return (symbol_table_entry
*)
232 _mesa_symbol_table_find_symbol(table
, -1, name
);
236 glsl_symbol_table::disable_variable(const char *name
)
238 /* Ideally we would remove the variable's entry from the symbol table, but
239 * that would be difficult. Fortunately, since this is only used for
240 * built-in variables, it won't be possible for the shader to re-introduce
241 * the variable later, so all we really need to do is to make sure that
242 * further attempts to access it using get_variable() will return NULL.
244 symbol_table_entry
*entry
= get_entry(name
);