Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright © 2010 Intel Corporation |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice (including the next |
| 12 | * paragraph) shall be included in all copies or substantial portions of the |
| 13 | * Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 21 | * DEALINGS IN THE SOFTWARE. |
| 22 | */ |
| 23 | |
| 24 | /** |
| 25 | * \file ast_to_hir.c |
| 26 | * Convert abstract syntax to to high-level intermediate reprensentation (HIR). |
| 27 | * |
| 28 | * During the conversion to HIR, the majority of the symantic checking is |
| 29 | * preformed on the program. This includes: |
| 30 | * |
| 31 | * * Symbol table management |
| 32 | * * Type checking |
| 33 | * * Function binding |
| 34 | * |
| 35 | * The majority of this work could be done during parsing, and the parser could |
| 36 | * probably generate HIR directly. However, this results in frequent changes |
| 37 | * to the parser code. Since we do not assume that every system this complier |
| 38 | * is built on will have Flex and Bison installed, we have to store the code |
| 39 | * generated by these tools in our version control system. In other parts of |
| 40 | * the system we've seen problems where a parser was changed but the generated |
| 41 | * code was not committed, merge conflicts where created because two developers |
| 42 | * had slightly different versions of Bison installed, etc. |
| 43 | * |
| 44 | * I have also noticed that running Bison generated parsers in GDB is very |
| 45 | * irritating. When you get a segfault on '$$ = $1->foo', you can't very |
| 46 | * well 'print $1' in GDB. |
| 47 | * |
| 48 | * As a result, my preference is to put as little C code as possible in the |
| 49 | * parser (and lexer) sources. |
| 50 | */ |
| 51 | #include <stdio.h> |
| 52 | #include "main/imports.h" |
Ian Romanick | 8bde4ce | 2010-03-19 11:57:24 -0700 | [diff] [blame] | 53 | #include "glsl_symbol_table.h" |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 54 | #include "glsl_parser_extras.h" |
| 55 | #include "ast.h" |
| 56 | #include "glsl_types.h" |
| 57 | #include "ir.h" |
| 58 | |
Ian Romanick | d949a9a | 2010-03-10 09:55:22 -0800 | [diff] [blame] | 59 | void |
| 60 | _mesa_ast_to_hir(exec_list *instructions, struct _mesa_glsl_parse_state *state) |
| 61 | { |
| 62 | struct simple_node *ptr; |
| 63 | |
Ian Romanick | adfb0cd | 2010-03-10 10:43:16 -0800 | [diff] [blame] | 64 | _mesa_glsl_initialize_variables(instructions, state); |
| 65 | |
Ian Romanick | 41ec6a4 | 2010-03-19 17:08:05 -0700 | [diff] [blame] | 66 | state->current_function = NULL; |
| 67 | |
Ian Romanick | d949a9a | 2010-03-10 09:55:22 -0800 | [diff] [blame] | 68 | foreach (ptr, & state->translation_unit) { |
| 69 | ((ast_node *)ptr)->hir(instructions, state); |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 74 | static const struct glsl_type * |
| 75 | arithmetic_result_type(const struct glsl_type *type_a, |
| 76 | const struct glsl_type *type_b, |
| 77 | bool multiply, |
| 78 | struct _mesa_glsl_parse_state *state) |
| 79 | { |
| 80 | /* From GLSL 1.50 spec, page 56: |
| 81 | * |
| 82 | * "The arithmetic binary operators add (+), subtract (-), |
| 83 | * multiply (*), and divide (/) operate on integer and |
| 84 | * floating-point scalars, vectors, and matrices." |
| 85 | */ |
| 86 | if (! is_numeric_base_type(type_a->base_type) |
| 87 | || ! is_numeric_base_type(type_b->base_type)) { |
| 88 | return glsl_error_type; |
| 89 | } |
| 90 | |
| 91 | |
| 92 | /* "If one operand is floating-point based and the other is |
| 93 | * not, then the conversions from Section 4.1.10 "Implicit |
| 94 | * Conversions" are applied to the non-floating-point-based operand." |
| 95 | * |
| 96 | * This conversion was added in GLSL 1.20. If the compilation mode is |
| 97 | * GLSL 1.10, the conversion is skipped. |
| 98 | */ |
| 99 | if (state->language_version >= 120) { |
| 100 | if ((type_a->base_type == GLSL_TYPE_FLOAT) |
| 101 | && (type_b->base_type != GLSL_TYPE_FLOAT)) { |
| 102 | } else if ((type_a->base_type != GLSL_TYPE_FLOAT) |
| 103 | && (type_b->base_type == GLSL_TYPE_FLOAT)) { |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | /* "If the operands are integer types, they must both be signed or |
| 108 | * both be unsigned." |
| 109 | * |
| 110 | * From this rule and the preceeding conversion it can be inferred that |
| 111 | * both types must be GLSL_TYPE_FLOAT, or GLSL_TYPE_UINT, or GLSL_TYPE_INT. |
| 112 | * The is_numeric_base_type check above already filtered out the case |
| 113 | * where either type is not one of these, so now the base types need only |
| 114 | * be tested for equality. |
| 115 | */ |
| 116 | if (type_a->base_type != type_b->base_type) { |
| 117 | return glsl_error_type; |
| 118 | } |
| 119 | |
| 120 | /* "All arithmetic binary operators result in the same fundamental type |
| 121 | * (signed integer, unsigned integer, or floating-point) as the |
| 122 | * operands they operate on, after operand type conversion. After |
| 123 | * conversion, the following cases are valid |
| 124 | * |
| 125 | * * The two operands are scalars. In this case the operation is |
| 126 | * applied, resulting in a scalar." |
| 127 | */ |
Ian Romanick | cb36f8a | 2010-03-09 15:51:22 -0800 | [diff] [blame] | 128 | if (type_a->is_scalar() && type_b->is_scalar()) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 129 | return type_a; |
| 130 | |
| 131 | /* "* One operand is a scalar, and the other is a vector or matrix. |
| 132 | * In this case, the scalar operation is applied independently to each |
| 133 | * component of the vector or matrix, resulting in the same size |
| 134 | * vector or matrix." |
| 135 | */ |
Ian Romanick | cb36f8a | 2010-03-09 15:51:22 -0800 | [diff] [blame] | 136 | if (type_a->is_scalar()) { |
| 137 | if (!type_b->is_scalar()) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 138 | return type_b; |
Ian Romanick | cb36f8a | 2010-03-09 15:51:22 -0800 | [diff] [blame] | 139 | } else if (type_b->is_scalar()) { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 140 | return type_a; |
| 141 | } |
| 142 | |
| 143 | /* All of the combinations of <scalar, scalar>, <vector, scalar>, |
| 144 | * <scalar, vector>, <scalar, matrix>, and <matrix, scalar> have been |
| 145 | * handled. |
| 146 | */ |
| 147 | assert(type_a->vector_elements > 1); |
| 148 | assert(type_b->vector_elements > 1); |
| 149 | |
| 150 | /* "* The two operands are vectors of the same size. In this case, the |
| 151 | * operation is done component-wise resulting in the same size |
| 152 | * vector." |
| 153 | */ |
Ian Romanick | a2dd22f | 2010-03-09 15:55:16 -0800 | [diff] [blame] | 154 | if (type_a->is_vector() && type_b->is_vector()) { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 155 | if (type_a->vector_elements == type_b->vector_elements) |
| 156 | return type_a; |
| 157 | else |
| 158 | return glsl_error_type; |
| 159 | } |
| 160 | |
| 161 | /* All of the combinations of <scalar, scalar>, <vector, scalar>, |
| 162 | * <scalar, vector>, <scalar, matrix>, <matrix, scalar>, and |
| 163 | * <vector, vector> have been handled. At least one of the operands must |
| 164 | * be matrix. Further, since there are no integer matrix types, the base |
| 165 | * type of both operands must be float. |
| 166 | */ |
| 167 | assert((type_a->matrix_rows > 1) || (type_b->matrix_rows > 1)); |
| 168 | assert(type_a->base_type == GLSL_TYPE_FLOAT); |
| 169 | assert(type_b->base_type == GLSL_TYPE_FLOAT); |
| 170 | |
| 171 | /* "* The operator is add (+), subtract (-), or divide (/), and the |
| 172 | * operands are matrices with the same number of rows and the same |
| 173 | * number of columns. In this case, the operation is done component- |
| 174 | * wise resulting in the same size matrix." |
| 175 | * * The operator is multiply (*), where both operands are matrices or |
| 176 | * one operand is a vector and the other a matrix. A right vector |
| 177 | * operand is treated as a column vector and a left vector operand as a |
| 178 | * row vector. In all these cases, it is required that the number of |
| 179 | * columns of the left operand is equal to the number of rows of the |
| 180 | * right operand. Then, the multiply (*) operation does a linear |
| 181 | * algebraic multiply, yielding an object that has the same number of |
| 182 | * rows as the left operand and the same number of columns as the right |
| 183 | * operand. Section 5.10 "Vector and Matrix Operations" explains in |
| 184 | * more detail how vectors and matrices are operated on." |
| 185 | */ |
| 186 | if (! multiply) { |
Ian Romanick | fce1150 | 2010-03-09 15:58:52 -0800 | [diff] [blame] | 187 | if (type_a->is_matrix() && type_b->is_matrix() |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 188 | && (type_a->vector_elements == type_b->vector_elements) |
| 189 | && (type_a->matrix_rows == type_b->matrix_rows)) |
| 190 | return type_a; |
| 191 | else |
| 192 | return glsl_error_type; |
| 193 | } else { |
Ian Romanick | fce1150 | 2010-03-09 15:58:52 -0800 | [diff] [blame] | 194 | if (type_a->is_matrix() && type_b->is_matrix()) { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 195 | if (type_a->vector_elements == type_b->matrix_rows) { |
| 196 | char type_name[7]; |
| 197 | const struct glsl_type *t; |
| 198 | |
| 199 | type_name[0] = 'm'; |
| 200 | type_name[1] = 'a'; |
| 201 | type_name[2] = 't'; |
| 202 | |
| 203 | if (type_a->matrix_rows == type_b->vector_elements) { |
| 204 | type_name[3] = '0' + type_a->matrix_rows; |
| 205 | type_name[4] = '\0'; |
| 206 | } else { |
| 207 | type_name[3] = '0' + type_a->matrix_rows; |
| 208 | type_name[4] = 'x'; |
| 209 | type_name[5] = '0' + type_b->vector_elements; |
| 210 | type_name[6] = '\0'; |
| 211 | } |
| 212 | |
Ian Romanick | 8bde4ce | 2010-03-19 11:57:24 -0700 | [diff] [blame] | 213 | t = state->symbols->get_type(type_name); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 214 | return (t != NULL) ? t : glsl_error_type; |
| 215 | } |
Ian Romanick | fce1150 | 2010-03-09 15:58:52 -0800 | [diff] [blame] | 216 | } else if (type_a->is_matrix()) { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 217 | /* A is a matrix and B is a column vector. Columns of A must match |
| 218 | * rows of B. |
| 219 | */ |
| 220 | if (type_a->vector_elements == type_b->vector_elements) |
| 221 | return type_b; |
| 222 | } else { |
Ian Romanick | fce1150 | 2010-03-09 15:58:52 -0800 | [diff] [blame] | 223 | assert(type_b->is_matrix()); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 224 | |
| 225 | /* A is a row vector and B is a matrix. Columns of A must match |
| 226 | * rows of B. |
| 227 | */ |
| 228 | if (type_a->vector_elements == type_b->matrix_rows) |
| 229 | return type_a; |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | |
| 234 | /* "All other cases are illegal." |
| 235 | */ |
| 236 | return glsl_error_type; |
| 237 | } |
| 238 | |
| 239 | |
| 240 | static const struct glsl_type * |
| 241 | unary_arithmetic_result_type(const struct glsl_type *type) |
| 242 | { |
| 243 | /* From GLSL 1.50 spec, page 57: |
| 244 | * |
| 245 | * "The arithmetic unary operators negate (-), post- and pre-increment |
| 246 | * and decrement (-- and ++) operate on integer or floating-point |
| 247 | * values (including vectors and matrices). All unary operators work |
| 248 | * component-wise on their operands. These result with the same type |
| 249 | * they operated on." |
| 250 | */ |
| 251 | if (!is_numeric_base_type(type->base_type)) |
| 252 | return glsl_error_type; |
| 253 | |
| 254 | return type; |
| 255 | } |
| 256 | |
| 257 | |
| 258 | static const struct glsl_type * |
| 259 | modulus_result_type(const struct glsl_type *type_a, |
| 260 | const struct glsl_type *type_b) |
| 261 | { |
| 262 | /* From GLSL 1.50 spec, page 56: |
| 263 | * "The operator modulus (%) operates on signed or unsigned integers or |
| 264 | * integer vectors. The operand types must both be signed or both be |
| 265 | * unsigned." |
| 266 | */ |
| 267 | if (! is_integer_base_type(type_a->base_type) |
| 268 | || ! is_integer_base_type(type_b->base_type) |
| 269 | || (type_a->base_type != type_b->base_type)) { |
| 270 | return glsl_error_type; |
| 271 | } |
| 272 | |
| 273 | /* "The operands cannot be vectors of differing size. If one operand is |
| 274 | * a scalar and the other vector, then the scalar is applied component- |
| 275 | * wise to the vector, resulting in the same type as the vector. If both |
| 276 | * are vectors of the same size, the result is computed component-wise." |
| 277 | */ |
Ian Romanick | a2dd22f | 2010-03-09 15:55:16 -0800 | [diff] [blame] | 278 | if (type_a->is_vector()) { |
| 279 | if (!type_b->is_vector() |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 280 | || (type_a->vector_elements == type_b->vector_elements)) |
| 281 | return type_a; |
| 282 | } else |
| 283 | return type_b; |
| 284 | |
| 285 | /* "The operator modulus (%) is not defined for any other data types |
| 286 | * (non-integer types)." |
| 287 | */ |
| 288 | return glsl_error_type; |
| 289 | } |
| 290 | |
| 291 | |
| 292 | static const struct glsl_type * |
| 293 | relational_result_type(const struct glsl_type *type_a, |
| 294 | const struct glsl_type *type_b, |
| 295 | struct _mesa_glsl_parse_state *state) |
| 296 | { |
| 297 | /* From GLSL 1.50 spec, page 56: |
| 298 | * "The relational operators greater than (>), less than (<), greater |
| 299 | * than or equal (>=), and less than or equal (<=) operate only on |
| 300 | * scalar integer and scalar floating-point expressions." |
| 301 | */ |
| 302 | if (! is_numeric_base_type(type_a->base_type) |
| 303 | || ! is_numeric_base_type(type_b->base_type) |
Ian Romanick | cb36f8a | 2010-03-09 15:51:22 -0800 | [diff] [blame] | 304 | || !type_a->is_scalar() |
| 305 | || !type_b->is_scalar()) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 306 | return glsl_error_type; |
| 307 | |
| 308 | /* "Either the operands' types must match, or the conversions from |
| 309 | * Section 4.1.10 "Implicit Conversions" will be applied to the integer |
| 310 | * operand, after which the types must match." |
| 311 | * |
| 312 | * This conversion was added in GLSL 1.20. If the compilation mode is |
| 313 | * GLSL 1.10, the conversion is skipped. |
| 314 | */ |
| 315 | if (state->language_version >= 120) { |
| 316 | if ((type_a->base_type == GLSL_TYPE_FLOAT) |
| 317 | && (type_b->base_type != GLSL_TYPE_FLOAT)) { |
| 318 | /* FINISHME: Generate the implicit type conversion. */ |
| 319 | } else if ((type_a->base_type != GLSL_TYPE_FLOAT) |
| 320 | && (type_b->base_type == GLSL_TYPE_FLOAT)) { |
| 321 | /* FINISHME: Generate the implicit type conversion. */ |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | if (type_a->base_type != type_b->base_type) |
| 326 | return glsl_error_type; |
| 327 | |
| 328 | /* "The result is scalar Boolean." |
| 329 | */ |
| 330 | return glsl_bool_type; |
| 331 | } |
| 332 | |
| 333 | |
Ian Romanick | 0bb1c3c | 2010-03-23 13:23:31 -0700 | [diff] [blame] | 334 | /** |
| 335 | * Validates that a value can be assigned to a location with a specified type |
| 336 | * |
| 337 | * Validates that \c rhs can be assigned to some location. If the types are |
| 338 | * not an exact match but an automatic conversion is possible, \c rhs will be |
| 339 | * converted. |
| 340 | * |
| 341 | * \return |
| 342 | * \c NULL if \c rhs cannot be assigned to a location with type \c lhs_type. |
| 343 | * Otherwise the actual RHS to be assigned will be returned. This may be |
| 344 | * \c rhs, or it may be \c rhs after some type conversion. |
| 345 | * |
| 346 | * \note |
| 347 | * In addition to being used for assignments, this function is used to |
| 348 | * type-check return values. |
| 349 | */ |
| 350 | ir_instruction * |
| 351 | validate_assignment(const glsl_type *lhs_type, ir_instruction *rhs) |
| 352 | { |
| 353 | const glsl_type *const rhs_type = rhs->type; |
| 354 | |
| 355 | /* If there is already some error in the RHS, just return it. Anything |
| 356 | * else will lead to an avalanche of error message back to the user. |
| 357 | */ |
| 358 | if (rhs_type->is_error()) |
| 359 | return rhs; |
| 360 | |
| 361 | /* FINISHME: For GLSL 1.10, check that the types are not arrays. */ |
| 362 | |
| 363 | /* If the types are identical, the assignment can trivially proceed. |
| 364 | */ |
| 365 | if (rhs_type == lhs_type) |
| 366 | return rhs; |
| 367 | |
| 368 | /* FINISHME: Check for and apply automatic conversions. */ |
| 369 | return NULL; |
| 370 | } |
| 371 | |
| 372 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 373 | ir_instruction * |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 374 | ast_node::hir(exec_list *instructions, |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 375 | struct _mesa_glsl_parse_state *state) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 376 | { |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 377 | (void) instructions; |
| 378 | (void) state; |
| 379 | |
| 380 | return NULL; |
| 381 | } |
| 382 | |
| 383 | |
| 384 | ir_instruction * |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 385 | ast_expression::hir(exec_list *instructions, |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 386 | struct _mesa_glsl_parse_state *state) |
| 387 | { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 388 | static const int operations[AST_NUM_OPERATORS] = { |
| 389 | -1, /* ast_assign doesn't convert to ir_expression. */ |
| 390 | -1, /* ast_plus doesn't convert to ir_expression. */ |
| 391 | ir_unop_neg, |
| 392 | ir_binop_add, |
| 393 | ir_binop_sub, |
| 394 | ir_binop_mul, |
| 395 | ir_binop_div, |
| 396 | ir_binop_mod, |
| 397 | ir_binop_lshift, |
| 398 | ir_binop_rshift, |
| 399 | ir_binop_less, |
| 400 | ir_binop_greater, |
| 401 | ir_binop_lequal, |
| 402 | ir_binop_gequal, |
| 403 | ir_binop_equal, |
| 404 | ir_binop_nequal, |
| 405 | ir_binop_bit_and, |
| 406 | ir_binop_bit_xor, |
| 407 | ir_binop_bit_or, |
| 408 | ir_unop_bit_not, |
| 409 | ir_binop_logic_and, |
| 410 | ir_binop_logic_xor, |
| 411 | ir_binop_logic_or, |
| 412 | ir_unop_logic_not, |
| 413 | |
| 414 | /* Note: The following block of expression types actually convert |
| 415 | * to multiple IR instructions. |
| 416 | */ |
| 417 | ir_binop_mul, /* ast_mul_assign */ |
| 418 | ir_binop_div, /* ast_div_assign */ |
| 419 | ir_binop_mod, /* ast_mod_assign */ |
| 420 | ir_binop_add, /* ast_add_assign */ |
| 421 | ir_binop_sub, /* ast_sub_assign */ |
| 422 | ir_binop_lshift, /* ast_ls_assign */ |
| 423 | ir_binop_rshift, /* ast_rs_assign */ |
| 424 | ir_binop_bit_and, /* ast_and_assign */ |
| 425 | ir_binop_bit_xor, /* ast_xor_assign */ |
| 426 | ir_binop_bit_or, /* ast_or_assign */ |
| 427 | |
| 428 | -1, /* ast_conditional doesn't convert to ir_expression. */ |
| 429 | -1, /* ast_pre_inc doesn't convert to ir_expression. */ |
| 430 | -1, /* ast_pre_dec doesn't convert to ir_expression. */ |
| 431 | -1, /* ast_post_inc doesn't convert to ir_expression. */ |
| 432 | -1, /* ast_post_dec doesn't convert to ir_expression. */ |
| 433 | -1, /* ast_field_selection doesn't conv to ir_expression. */ |
| 434 | -1, /* ast_array_index doesn't convert to ir_expression. */ |
| 435 | -1, /* ast_function_call doesn't conv to ir_expression. */ |
| 436 | -1, /* ast_identifier doesn't convert to ir_expression. */ |
| 437 | -1, /* ast_int_constant doesn't convert to ir_expression. */ |
| 438 | -1, /* ast_uint_constant doesn't conv to ir_expression. */ |
| 439 | -1, /* ast_float_constant doesn't conv to ir_expression. */ |
| 440 | -1, /* ast_bool_constant doesn't conv to ir_expression. */ |
| 441 | -1, /* ast_sequence doesn't convert to ir_expression. */ |
| 442 | }; |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 443 | ir_instruction *result = NULL; |
| 444 | ir_instruction *op[2]; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 445 | struct simple_node op_list; |
| 446 | const struct glsl_type *type = glsl_error_type; |
| 447 | bool error_emitted = false; |
| 448 | YYLTYPE loc; |
| 449 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 450 | loc = this->get_location(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 451 | make_empty_list(& op_list); |
| 452 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 453 | switch (this->oper) { |
Ian Romanick | 6652af3 | 2010-03-09 16:38:02 -0800 | [diff] [blame] | 454 | case ast_assign: { |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 455 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 456 | op[1] = this->subexpressions[1]->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 457 | |
| 458 | error_emitted = ((op[0]->type == glsl_error_type) |
| 459 | || (op[1]->type == glsl_error_type)); |
| 460 | |
| 461 | type = op[0]->type; |
| 462 | if (!error_emitted) { |
| 463 | YYLTYPE loc; |
| 464 | |
| 465 | /* FINISHME: This does not handle 'foo.bar.a.b.c[5].d = 5' */ |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 466 | loc = this->subexpressions[0]->get_location(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 467 | if (op[0]->mode != ir_op_dereference) { |
| 468 | _mesa_glsl_error(& loc, state, "invalid lvalue in assignment"); |
| 469 | error_emitted = true; |
| 470 | |
| 471 | type = glsl_error_type; |
| 472 | } else { |
| 473 | const struct ir_dereference *const ref = |
| 474 | (struct ir_dereference *) op[0]; |
| 475 | const struct ir_variable *const var = |
| 476 | (struct ir_variable *) ref->var; |
| 477 | |
| 478 | if ((var != NULL) |
| 479 | && (var->mode == ir_op_var_decl) |
| 480 | && (var->read_only)) { |
| 481 | _mesa_glsl_error(& loc, state, "cannot assign to read-only " |
| 482 | "variable `%s'", var->name); |
| 483 | error_emitted = true; |
| 484 | |
| 485 | type = glsl_error_type; |
| 486 | } |
| 487 | } |
| 488 | } |
| 489 | |
Ian Romanick | 0bb1c3c | 2010-03-23 13:23:31 -0700 | [diff] [blame] | 490 | ir_instruction *rhs = validate_assignment(op[0]->type, op[1]); |
| 491 | if (rhs == NULL) { |
| 492 | type = glsl_error_type; |
| 493 | rhs = op[1]; |
| 494 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 495 | |
Ian Romanick | 6652af3 | 2010-03-09 16:38:02 -0800 | [diff] [blame] | 496 | ir_instruction *tmp = new ir_assignment(op[0], op[1], NULL); |
| 497 | instructions->push_tail(tmp); |
| 498 | |
| 499 | result = op[0]; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 500 | break; |
Ian Romanick | 6652af3 | 2010-03-09 16:38:02 -0800 | [diff] [blame] | 501 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 502 | |
| 503 | case ast_plus: |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 504 | op[0] = this->subexpressions[0]->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 505 | |
| 506 | error_emitted = (op[0]->type == glsl_error_type); |
| 507 | if (type == glsl_error_type) |
| 508 | op[0]->type = type; |
| 509 | |
| 510 | result = op[0]; |
| 511 | break; |
| 512 | |
| 513 | case ast_neg: |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 514 | op[0] = this->subexpressions[0]->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 515 | |
| 516 | type = unary_arithmetic_result_type(op[0]->type); |
| 517 | |
| 518 | error_emitted = (op[0]->type == glsl_error_type); |
| 519 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 520 | result = new ir_expression(operations[this->oper], type, |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 521 | op[0], NULL); |
| 522 | break; |
| 523 | |
| 524 | case ast_add: |
| 525 | case ast_sub: |
| 526 | case ast_mul: |
| 527 | case ast_div: |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 528 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 529 | op[1] = this->subexpressions[1]->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 530 | |
| 531 | type = arithmetic_result_type(op[0]->type, op[1]->type, |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 532 | (this->oper == ast_mul), |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 533 | state); |
| 534 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 535 | result = new ir_expression(operations[this->oper], type, |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 536 | op[0], op[1]); |
| 537 | break; |
| 538 | |
| 539 | case ast_mod: |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 540 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 541 | op[1] = this->subexpressions[1]->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 542 | |
| 543 | error_emitted = ((op[0]->type == glsl_error_type) |
| 544 | || (op[1]->type == glsl_error_type)); |
| 545 | |
| 546 | type = modulus_result_type(op[0]->type, op[1]->type); |
| 547 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 548 | assert(operations[this->oper] == ir_binop_mod); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 549 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 550 | result = new ir_expression(operations[this->oper], type, |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 551 | op[0], op[1]); |
| 552 | break; |
| 553 | |
| 554 | case ast_lshift: |
| 555 | case ast_rshift: |
| 556 | /* FINISHME: Implement bit-shift operators. */ |
| 557 | break; |
| 558 | |
| 559 | case ast_less: |
| 560 | case ast_greater: |
| 561 | case ast_lequal: |
| 562 | case ast_gequal: |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 563 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 564 | op[1] = this->subexpressions[1]->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 565 | |
| 566 | error_emitted = ((op[0]->type == glsl_error_type) |
| 567 | || (op[1]->type == glsl_error_type)); |
| 568 | |
| 569 | type = relational_result_type(op[0]->type, op[1]->type, state); |
| 570 | |
| 571 | /* The relational operators must either generate an error or result |
| 572 | * in a scalar boolean. See page 57 of the GLSL 1.50 spec. |
| 573 | */ |
| 574 | assert((type == glsl_error_type) |
| 575 | || ((type->base_type == GLSL_TYPE_BOOL) |
Ian Romanick | cb36f8a | 2010-03-09 15:51:22 -0800 | [diff] [blame] | 576 | && type->is_scalar())); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 577 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 578 | result = new ir_expression(operations[this->oper], type, |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 579 | op[0], op[1]); |
| 580 | break; |
| 581 | |
| 582 | case ast_nequal: |
| 583 | case ast_equal: |
| 584 | /* FINISHME: Implement equality operators. */ |
| 585 | break; |
| 586 | |
| 587 | case ast_bit_and: |
| 588 | case ast_bit_xor: |
| 589 | case ast_bit_or: |
| 590 | case ast_bit_not: |
| 591 | /* FINISHME: Implement bit-wise operators. */ |
| 592 | break; |
| 593 | |
| 594 | case ast_logic_and: |
| 595 | case ast_logic_xor: |
| 596 | case ast_logic_or: |
| 597 | case ast_logic_not: |
| 598 | /* FINISHME: Implement logical operators. */ |
| 599 | break; |
| 600 | |
| 601 | case ast_mul_assign: |
| 602 | case ast_div_assign: |
| 603 | case ast_add_assign: |
| 604 | case ast_sub_assign: { |
| 605 | struct ir_instruction *temp_rhs; |
| 606 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 607 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 608 | op[1] = this->subexpressions[1]->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 609 | |
| 610 | error_emitted = ((op[0]->type == glsl_error_type) |
| 611 | || (op[1]->type == glsl_error_type)); |
| 612 | |
| 613 | type = arithmetic_result_type(op[0]->type, op[1]->type, |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 614 | (this->oper == ast_mul_assign), |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 615 | state); |
| 616 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 617 | temp_rhs = new ir_expression(operations[this->oper], type, |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 618 | op[0], op[1]); |
| 619 | |
| 620 | /* FINISHME: Check that the LHS is assignable. */ |
| 621 | |
| 622 | /* We still have to test that the LHS and RHS have matching type. For |
| 623 | * example, the following GLSL code should generate a type error: |
| 624 | * |
| 625 | * mat4 m; vec4 v; m *= v; |
| 626 | * |
| 627 | * The type of (m*v) is a vec4, but the type of m is a mat4. |
| 628 | * |
| 629 | * FINISHME: Is multiplication between a matrix and a vector the only |
| 630 | * FINISHME: case that resuls in mismatched types? |
| 631 | */ |
| 632 | /* FINISHME: Check that the LHS and RHS have matching types. */ |
| 633 | |
| 634 | /* GLSL 1.10 does not allow array assignment. However, we don't have to |
| 635 | * explicitly test for this because none of the binary expression |
| 636 | * operators allow array operands either. |
| 637 | */ |
| 638 | |
| 639 | /* FINISHME: This is wrong. The operation should assign to a new |
| 640 | * FINISHME: temporary. This assignment should then be added to the |
| 641 | * FINISHME: instruction list. Another assignment to the real |
| 642 | * FINISHME: destination should be generated. The temporary should then |
| 643 | * FINISHME: be returned as the r-value. |
| 644 | */ |
| 645 | result = new ir_assignment(op[0], temp_rhs, NULL); |
| 646 | break; |
| 647 | } |
| 648 | |
| 649 | case ast_mod_assign: |
| 650 | |
| 651 | case ast_ls_assign: |
| 652 | case ast_rs_assign: |
| 653 | |
| 654 | case ast_and_assign: |
| 655 | case ast_xor_assign: |
| 656 | case ast_or_assign: |
| 657 | |
| 658 | case ast_conditional: |
| 659 | |
| 660 | case ast_pre_inc: |
| 661 | case ast_pre_dec: |
| 662 | |
| 663 | case ast_post_inc: |
| 664 | case ast_post_dec: |
| 665 | break; |
| 666 | |
| 667 | case ast_field_selection: |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 668 | result = _mesa_ast_field_selection_to_hir(this, instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 669 | type = result->type; |
| 670 | break; |
| 671 | |
| 672 | case ast_array_index: |
| 673 | break; |
| 674 | |
| 675 | case ast_function_call: |
Ian Romanick | 7cfddf1 | 2010-03-10 13:26:52 -0800 | [diff] [blame] | 676 | /* Should *NEVER* get here. ast_function_call should always be handled |
| 677 | * by ast_function_expression::hir. |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 678 | */ |
Ian Romanick | 7cfddf1 | 2010-03-10 13:26:52 -0800 | [diff] [blame] | 679 | assert(0); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 680 | break; |
| 681 | |
| 682 | case ast_identifier: { |
| 683 | /* ast_identifier can appear several places in a full abstract syntax |
| 684 | * tree. This particular use must be at location specified in the grammar |
| 685 | * as 'variable_identifier'. |
| 686 | */ |
Ian Romanick | 8bde4ce | 2010-03-19 11:57:24 -0700 | [diff] [blame] | 687 | ir_variable *var = |
| 688 | state->symbols->get_variable(this->primary_expression.identifier); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 689 | |
| 690 | result = new ir_dereference(var); |
| 691 | |
| 692 | if (var != NULL) { |
| 693 | type = result->type; |
| 694 | } else { |
Ian Romanick | 71d0bbf | 2010-03-23 13:21:19 -0700 | [diff] [blame] | 695 | _mesa_glsl_error(& loc, state, "`%s' undeclared", |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 696 | this->primary_expression.identifier); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 697 | |
| 698 | error_emitted = true; |
| 699 | } |
| 700 | break; |
| 701 | } |
| 702 | |
| 703 | case ast_int_constant: |
| 704 | type = glsl_int_type; |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 705 | result = new ir_constant(type, & this->primary_expression); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 706 | break; |
| 707 | |
| 708 | case ast_uint_constant: |
| 709 | type = glsl_uint_type; |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 710 | result = new ir_constant(type, & this->primary_expression); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 711 | break; |
| 712 | |
| 713 | case ast_float_constant: |
| 714 | type = glsl_float_type; |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 715 | result = new ir_constant(type, & this->primary_expression); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 716 | break; |
| 717 | |
| 718 | case ast_bool_constant: |
| 719 | type = glsl_bool_type; |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 720 | result = new ir_constant(type, & this->primary_expression); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 721 | break; |
| 722 | |
| 723 | case ast_sequence: { |
| 724 | struct simple_node *ptr; |
| 725 | |
| 726 | /* It should not be possible to generate a sequence in the AST without |
| 727 | * any expressions in it. |
| 728 | */ |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 729 | assert(!is_empty_list(&this->expressions)); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 730 | |
| 731 | /* The r-value of a sequence is the last expression in the sequence. If |
| 732 | * the other expressions in the sequence do not have side-effects (and |
| 733 | * therefore add instructions to the instruction list), they get dropped |
| 734 | * on the floor. |
| 735 | */ |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 736 | foreach (ptr, &this->expressions) |
| 737 | result = ((ast_node *)ptr)->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 738 | |
| 739 | type = result->type; |
| 740 | |
| 741 | /* Any errors should have already been emitted in the loop above. |
| 742 | */ |
| 743 | error_emitted = true; |
| 744 | break; |
| 745 | } |
| 746 | } |
| 747 | |
| 748 | if (is_error_type(type) && !error_emitted) |
Ian Romanick | 71d0bbf | 2010-03-23 13:21:19 -0700 | [diff] [blame] | 749 | _mesa_glsl_error(& loc, state, "type mismatch"); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 750 | |
| 751 | return result; |
| 752 | } |
| 753 | |
| 754 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 755 | ir_instruction * |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 756 | ast_expression_statement::hir(exec_list *instructions, |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 757 | struct _mesa_glsl_parse_state *state) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 758 | { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 759 | /* It is possible to have expression statements that don't have an |
| 760 | * expression. This is the solitary semicolon: |
| 761 | * |
| 762 | * for (i = 0; i < 5; i++) |
| 763 | * ; |
| 764 | * |
| 765 | * In this case the expression will be NULL. Test for NULL and don't do |
| 766 | * anything in that case. |
| 767 | */ |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 768 | if (expression != NULL) |
| 769 | expression->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 770 | |
| 771 | /* Statements do not have r-values. |
| 772 | */ |
| 773 | return NULL; |
| 774 | } |
| 775 | |
| 776 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 777 | ir_instruction * |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 778 | ast_compound_statement::hir(exec_list *instructions, |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 779 | struct _mesa_glsl_parse_state *state) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 780 | { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 781 | struct simple_node *ptr; |
| 782 | |
| 783 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 784 | if (new_scope) |
Ian Romanick | 8bde4ce | 2010-03-19 11:57:24 -0700 | [diff] [blame] | 785 | state->symbols->push_scope(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 786 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 787 | foreach (ptr, &statements) |
| 788 | ((ast_node *)ptr)->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 789 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 790 | if (new_scope) |
Ian Romanick | 8bde4ce | 2010-03-19 11:57:24 -0700 | [diff] [blame] | 791 | state->symbols->pop_scope(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 792 | |
| 793 | /* Compound statements do not have r-values. |
| 794 | */ |
| 795 | return NULL; |
| 796 | } |
| 797 | |
| 798 | |
| 799 | static const struct glsl_type * |
| 800 | type_specifier_to_glsl_type(const struct ast_type_specifier *spec, |
| 801 | const char **name, |
| 802 | struct _mesa_glsl_parse_state *state) |
| 803 | { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 804 | struct glsl_type *type; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 805 | |
| 806 | if (spec->type_specifier == ast_struct) { |
| 807 | /* FINISHME: Handle annonymous structures. */ |
| 808 | type = NULL; |
| 809 | } else { |
Ian Romanick | 8bde4ce | 2010-03-19 11:57:24 -0700 | [diff] [blame] | 810 | type = state->symbols->get_type(spec->type_name); |
Ian Romanick | 7f9d309 | 2010-03-15 14:15:15 -0700 | [diff] [blame] | 811 | *name = spec->type_name; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 812 | |
| 813 | /* FINISHME: Handle array declarations. Note that this requires complete |
Ian Romanick | f3f111e | 2010-03-23 13:04:19 -0700 | [diff] [blame] | 814 | * FINISHME: handling of constant expressions. |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 815 | */ |
| 816 | } |
| 817 | |
| 818 | return type; |
| 819 | } |
| 820 | |
| 821 | |
| 822 | static void |
| 823 | apply_type_qualifier_to_variable(const struct ast_type_qualifier *qual, |
| 824 | struct ir_variable *var, |
| 825 | struct _mesa_glsl_parse_state *state) |
| 826 | { |
| 827 | if (qual->invariant) |
| 828 | var->invariant = 1; |
| 829 | |
| 830 | /* FINISHME: Mark 'in' variables at global scope as read-only. */ |
| 831 | if (qual->constant || qual->attribute || qual->uniform |
| 832 | || (qual->varying && (state->target == fragment_shader))) |
| 833 | var->read_only = 1; |
| 834 | |
| 835 | if (qual->centroid) |
| 836 | var->centroid = 1; |
| 837 | |
| 838 | if (qual->in && qual->out) |
| 839 | var->mode = ir_var_inout; |
| 840 | else if (qual->attribute || qual->in |
| 841 | || (qual->varying && (state->target == fragment_shader))) |
| 842 | var->mode = ir_var_in; |
Ian Romanick | 0b67823 | 2010-03-10 00:28:59 -0800 | [diff] [blame] | 843 | else if (qual->out || (qual->varying && (state->target == vertex_shader))) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 844 | var->mode = ir_var_out; |
| 845 | else if (qual->uniform) |
| 846 | var->mode = ir_var_uniform; |
| 847 | else |
| 848 | var->mode = ir_var_auto; |
| 849 | |
| 850 | if (qual->flat) |
| 851 | var->interpolation = ir_var_flat; |
| 852 | else if (qual->noperspective) |
| 853 | var->interpolation = ir_var_noperspective; |
| 854 | else |
| 855 | var->interpolation = ir_var_smooth; |
| 856 | } |
| 857 | |
| 858 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 859 | ir_instruction * |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 860 | ast_declarator_list::hir(exec_list *instructions, |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 861 | struct _mesa_glsl_parse_state *state) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 862 | { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 863 | struct simple_node *ptr; |
| 864 | const struct glsl_type *decl_type; |
| 865 | const char *type_name = NULL; |
| 866 | |
| 867 | |
| 868 | /* FINISHME: Handle vertex shader "invariant" declarations that do not |
| 869 | * FINISHME: include a type. These re-declare built-in variables to be |
| 870 | * FINISHME: invariant. |
| 871 | */ |
| 872 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 873 | decl_type = type_specifier_to_glsl_type(this->type->specifier, |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 874 | & type_name, state); |
| 875 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 876 | foreach (ptr, &this->declarations) { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 877 | struct ast_declaration *const decl = (struct ast_declaration * )ptr; |
| 878 | const struct glsl_type *var_type; |
| 879 | struct ir_variable *var; |
| 880 | |
| 881 | |
| 882 | /* FINISHME: Emit a warning if a variable declaration shadows a |
| 883 | * FINISHME: declaration at a higher scope. |
| 884 | */ |
| 885 | |
Ian Romanick | cec65a6 | 2010-03-23 12:28:44 -0700 | [diff] [blame] | 886 | if ((decl_type == NULL) || decl_type->is_void()) { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 887 | YYLTYPE loc; |
| 888 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 889 | loc = this->get_location(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 890 | if (type_name != NULL) { |
| 891 | _mesa_glsl_error(& loc, state, |
| 892 | "invalid type `%s' in declaration of `%s'", |
| 893 | type_name, decl->identifier); |
| 894 | } else { |
| 895 | _mesa_glsl_error(& loc, state, |
| 896 | "invalid type in declaration of `%s'", |
| 897 | decl->identifier); |
| 898 | } |
| 899 | continue; |
| 900 | } |
| 901 | |
| 902 | if (decl->is_array) { |
| 903 | /* FINISHME: Handle array declarations. Note that this requires |
| 904 | * FINISHME: complete handling of constant expressions. |
| 905 | */ |
| 906 | |
| 907 | /* FINISHME: Reject delcarations of multidimensional arrays. */ |
| 908 | } else { |
| 909 | var_type = decl_type; |
| 910 | } |
| 911 | |
| 912 | var = new ir_variable(var_type, decl->identifier); |
| 913 | |
Ian Romanick | f3f111e | 2010-03-23 13:04:19 -0700 | [diff] [blame] | 914 | /* FINISHME: Variables that are attribute, uniform, varying, in, or |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 915 | * FINISHME: out varibles must be declared either at global scope or |
| 916 | * FINISHME: in a parameter list (in and out only). |
| 917 | */ |
| 918 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 919 | apply_type_qualifier_to_variable(& this->type->qualifier, var, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 920 | |
| 921 | /* Attempt to add the variable to the symbol table. If this fails, it |
| 922 | * means the variable has already been declared at this scope. |
| 923 | */ |
Ian Romanick | 3359e58 | 2010-03-19 15:38:52 -0700 | [diff] [blame] | 924 | if (state->symbols->name_declared_this_scope(decl->identifier)) { |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 925 | YYLTYPE loc = this->get_location(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 926 | |
| 927 | _mesa_glsl_error(& loc, state, "`%s' redeclared", |
| 928 | decl->identifier); |
| 929 | continue; |
| 930 | } |
| 931 | |
Ian Romanick | 3359e58 | 2010-03-19 15:38:52 -0700 | [diff] [blame] | 932 | const bool added_variable = |
| 933 | state->symbols->add_variable(decl->identifier, var); |
| 934 | assert(added_variable); |
| 935 | |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 936 | instructions->push_tail(var); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 937 | |
| 938 | /* FINISHME: Process the declaration initializer. */ |
| 939 | } |
| 940 | |
| 941 | /* Variable declarations do not have r-values. |
| 942 | */ |
| 943 | return NULL; |
| 944 | } |
| 945 | |
| 946 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 947 | ir_instruction * |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 948 | ast_parameter_declarator::hir(exec_list *instructions, |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 949 | struct _mesa_glsl_parse_state *state) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 950 | { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 951 | const struct glsl_type *type; |
| 952 | const char *name = NULL; |
| 953 | |
| 954 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 955 | type = type_specifier_to_glsl_type(this->type->specifier, & name, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 956 | |
| 957 | if (type == NULL) { |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 958 | YYLTYPE loc = this->get_location(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 959 | if (name != NULL) { |
| 960 | _mesa_glsl_error(& loc, state, |
| 961 | "invalid type `%s' in declaration of `%s'", |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 962 | name, this->identifier); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 963 | } else { |
| 964 | _mesa_glsl_error(& loc, state, |
| 965 | "invalid type in declaration of `%s'", |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 966 | this->identifier); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 967 | } |
| 968 | |
| 969 | type = glsl_error_type; |
| 970 | } |
| 971 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 972 | ir_variable *var = new ir_variable(type, this->identifier); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 973 | |
| 974 | /* FINISHME: Handle array declarations. Note that this requires |
| 975 | * FINISHME: complete handling of constant expressions. |
| 976 | */ |
| 977 | |
Ian Romanick | cdb8d54 | 2010-03-11 14:48:51 -0800 | [diff] [blame] | 978 | /* Apply any specified qualifiers to the parameter declaration. Note that |
| 979 | * for function parameters the default mode is 'in'. |
| 980 | */ |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 981 | apply_type_qualifier_to_variable(& this->type->qualifier, var, state); |
Ian Romanick | cdb8d54 | 2010-03-11 14:48:51 -0800 | [diff] [blame] | 982 | if (var->mode == ir_var_auto) |
| 983 | var->mode = ir_var_in; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 984 | |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 985 | instructions->push_tail(var); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 986 | |
| 987 | /* Parameter declarations do not have r-values. |
| 988 | */ |
| 989 | return NULL; |
| 990 | } |
| 991 | |
| 992 | |
| 993 | static void |
| 994 | ast_function_parameters_to_hir(struct simple_node *ast_parameters, |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 995 | exec_list *ir_parameters, |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 996 | struct _mesa_glsl_parse_state *state) |
| 997 | { |
| 998 | struct simple_node *ptr; |
| 999 | |
| 1000 | foreach (ptr, ast_parameters) { |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1001 | ((ast_node *)ptr)->hir(ir_parameters, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1002 | } |
| 1003 | } |
| 1004 | |
| 1005 | |
| 1006 | static bool |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 1007 | parameter_lists_match(exec_list *list_a, exec_list *list_b) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1008 | { |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 1009 | exec_list_iterator iter_a = list_a->iterator(); |
| 1010 | exec_list_iterator iter_b = list_b->iterator(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1011 | |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 1012 | while (iter_a.has_next()) { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1013 | /* If all of the parameters from the other parameter list have been |
| 1014 | * exhausted, the lists have different length and, by definition, |
| 1015 | * do not match. |
| 1016 | */ |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 1017 | if (!iter_b.has_next()) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1018 | return false; |
| 1019 | |
| 1020 | /* If the types of the parameters do not match, the parameters lists |
| 1021 | * are different. |
| 1022 | */ |
| 1023 | /* FINISHME */ |
| 1024 | |
| 1025 | |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 1026 | iter_a.next(); |
| 1027 | iter_b.next(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1028 | } |
| 1029 | |
| 1030 | return true; |
| 1031 | } |
| 1032 | |
| 1033 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1034 | ir_instruction * |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 1035 | ast_function_definition::hir(exec_list *instructions, |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1036 | struct _mesa_glsl_parse_state *state) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1037 | { |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1038 | ir_label *label; |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1039 | ir_function_signature *signature = NULL; |
| 1040 | ir_function *f = NULL; |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 1041 | exec_list parameters; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1042 | |
| 1043 | |
| 1044 | /* Convert the list of function parameters to HIR now so that they can be |
| 1045 | * used below to compare this function's signature with previously seen |
| 1046 | * signatures for functions with the same name. |
| 1047 | */ |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1048 | ast_function_parameters_to_hir(& this->prototype->parameters, & parameters, |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1049 | state); |
| 1050 | |
Ian Romanick | e39cc69 | 2010-03-23 12:19:13 -0700 | [diff] [blame] | 1051 | const char *return_type_name; |
| 1052 | const glsl_type *return_type = |
| 1053 | type_specifier_to_glsl_type(this->prototype->return_type->specifier, |
| 1054 | & return_type_name, state); |
| 1055 | |
| 1056 | assert(return_type != NULL); |
| 1057 | |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1058 | |
| 1059 | /* Verify that this function's signature either doesn't match a previously |
| 1060 | * seen signature for a function with the same name, or, if a match is found, |
| 1061 | * that the previously seen signature does not have an associated definition. |
| 1062 | */ |
Ian Romanick | 3359e58 | 2010-03-19 15:38:52 -0700 | [diff] [blame] | 1063 | const char *const name = this->prototype->identifier; |
| 1064 | f = state->symbols->get_function(name); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1065 | if (f != NULL) { |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 1066 | foreach_iter(exec_list_iterator, iter, f->signatures) { |
| 1067 | signature = (struct ir_function_signature *) iter.get(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1068 | |
| 1069 | /* Compare the parameter list of the function being defined to the |
| 1070 | * existing function. If the parameter lists match, then the return |
| 1071 | * type must also match and the existing function must not have a |
| 1072 | * definition. |
| 1073 | */ |
| 1074 | if (parameter_lists_match(& parameters, & signature->parameters)) { |
| 1075 | /* FINISHME: Compare return types. */ |
| 1076 | |
| 1077 | if (signature->definition != NULL) { |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1078 | YYLTYPE loc = this->get_location(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1079 | |
Ian Romanick | 3359e58 | 2010-03-19 15:38:52 -0700 | [diff] [blame] | 1080 | _mesa_glsl_error(& loc, state, "function `%s' redefined", name); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1081 | signature = NULL; |
| 1082 | break; |
| 1083 | } |
| 1084 | } |
| 1085 | |
| 1086 | signature = NULL; |
| 1087 | } |
| 1088 | |
Ian Romanick | 3359e58 | 2010-03-19 15:38:52 -0700 | [diff] [blame] | 1089 | } else if (state->symbols->name_declared_this_scope(name)) { |
| 1090 | /* This function name shadows a non-function use of the same name. |
| 1091 | */ |
| 1092 | YYLTYPE loc = this->get_location(); |
| 1093 | |
| 1094 | _mesa_glsl_error(& loc, state, "function name `%s' conflicts with " |
| 1095 | "non-function", name); |
| 1096 | signature = NULL; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1097 | } else { |
Ian Romanick | 882dad7 | 2010-03-23 17:42:04 -0700 | [diff] [blame^] | 1098 | f = new ir_function(name); |
Ian Romanick | 8bde4ce | 2010-03-19 11:57:24 -0700 | [diff] [blame] | 1099 | state->symbols->add_function(f->name, f); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1100 | } |
| 1101 | |
| 1102 | |
| 1103 | /* Finish storing the information about this new function in its signature. |
| 1104 | */ |
| 1105 | if (signature == NULL) { |
Ian Romanick | e39cc69 | 2010-03-23 12:19:13 -0700 | [diff] [blame] | 1106 | signature = new ir_function_signature(return_type); |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 1107 | f->signatures.push_tail(signature); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1108 | } else { |
| 1109 | /* Destroy all of the previous parameter information. The previous |
| 1110 | * parameter information comes from the function prototype, and it can |
| 1111 | * either include invalid parameter names or may not have names at all. |
| 1112 | */ |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 1113 | foreach_iter(exec_list_iterator, iter, signature->parameters) { |
| 1114 | assert(((struct ir_instruction *)iter.get())->mode == ir_op_var_decl); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1115 | |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 1116 | iter.remove(); |
| 1117 | delete iter.get(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1118 | } |
| 1119 | } |
| 1120 | |
| 1121 | |
Ian Romanick | 41ec6a4 | 2010-03-19 17:08:05 -0700 | [diff] [blame] | 1122 | assert(state->current_function == NULL); |
| 1123 | state->current_function = signature; |
| 1124 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1125 | ast_function_parameters_to_hir(& this->prototype->parameters, |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1126 | & signature->parameters, |
| 1127 | state); |
| 1128 | /* FINISHME: Set signature->return_type */ |
| 1129 | |
Ian Romanick | 3359e58 | 2010-03-19 15:38:52 -0700 | [diff] [blame] | 1130 | label = new ir_label(name); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1131 | if (signature->definition == NULL) { |
| 1132 | signature->definition = label; |
| 1133 | } |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 1134 | instructions->push_tail(label); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1135 | |
| 1136 | /* Add the function parameters to the symbol table. During this step the |
| 1137 | * parameter declarations are also moved from the temporary "parameters" list |
| 1138 | * to the instruction list. There are other more efficient ways to do this, |
| 1139 | * but they involve ugly linked-list gymnastics. |
| 1140 | */ |
Ian Romanick | 8bde4ce | 2010-03-19 11:57:24 -0700 | [diff] [blame] | 1141 | state->symbols->push_scope(); |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 1142 | foreach_iter(exec_list_iterator, iter, parameters) { |
| 1143 | ir_variable *const var = (ir_variable *) iter.get(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1144 | |
Ian Romanick | cdb8d54 | 2010-03-11 14:48:51 -0800 | [diff] [blame] | 1145 | assert(((ir_instruction *)var)->mode == ir_op_var_decl); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1146 | |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 1147 | iter.remove(); |
| 1148 | instructions->push_tail(var); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1149 | |
Ian Romanick | 3359e58 | 2010-03-19 15:38:52 -0700 | [diff] [blame] | 1150 | /* The only way a parameter would "exist" is if two parameters have |
| 1151 | * the same name. |
| 1152 | */ |
| 1153 | if (state->symbols->name_declared_this_scope(var->name)) { |
| 1154 | YYLTYPE loc = this->get_location(); |
| 1155 | |
| 1156 | _mesa_glsl_error(& loc, state, "parameter `%s' redeclared", var->name); |
| 1157 | } else { |
| 1158 | state->symbols->add_variable(var->name, var); |
| 1159 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1160 | } |
| 1161 | |
| 1162 | /* Convert the body of the function to HIR, and append the resulting |
| 1163 | * instructions to the list that currently consists of the function label |
| 1164 | * and the function parameters. |
| 1165 | */ |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1166 | this->body->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1167 | |
Ian Romanick | 8bde4ce | 2010-03-19 11:57:24 -0700 | [diff] [blame] | 1168 | state->symbols->pop_scope(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1169 | |
Ian Romanick | 41ec6a4 | 2010-03-19 17:08:05 -0700 | [diff] [blame] | 1170 | assert(state->current_function == signature); |
| 1171 | state->current_function = NULL; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1172 | |
| 1173 | /* Function definitions do not have r-values. |
| 1174 | */ |
| 1175 | return NULL; |
| 1176 | } |
Ian Romanick | 16a246c | 2010-03-19 16:45:19 -0700 | [diff] [blame] | 1177 | |
| 1178 | |
| 1179 | ir_instruction * |
| 1180 | ast_jump_statement::hir(exec_list *instructions, |
| 1181 | struct _mesa_glsl_parse_state *state) |
| 1182 | { |
| 1183 | |
| 1184 | if (mode == ast_return) { |
| 1185 | ir_return *inst; |
| 1186 | |
| 1187 | if (opt_return_value) { |
| 1188 | /* FINISHME: Make sure the enclosing function has a non-void return |
| 1189 | * FINISHME: type. |
| 1190 | */ |
| 1191 | |
| 1192 | ir_expression *const ret = (ir_expression *) |
| 1193 | opt_return_value->hir(instructions, state); |
| 1194 | assert(ret != NULL); |
| 1195 | |
| 1196 | /* FINISHME: Make sure the type of the return value matches the return |
| 1197 | * FINISHME: type of the enclosing function. |
| 1198 | */ |
| 1199 | |
| 1200 | inst = new ir_return(ret); |
| 1201 | } else { |
| 1202 | /* FINISHME: Make sure the enclosing function has a void return type. |
| 1203 | */ |
| 1204 | inst = new ir_return; |
| 1205 | } |
| 1206 | |
| 1207 | instructions->push_tail(inst); |
| 1208 | } |
| 1209 | |
| 1210 | /* Jump instructions do not have r-values. |
| 1211 | */ |
| 1212 | return NULL; |
| 1213 | } |