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 | */ |
Eric Anholt | ac95f2f | 2010-06-22 10:38:52 -0700 | [diff] [blame] | 51 | |
Chia-I Wu | bfd7c9a | 2010-08-23 17:51:42 +0800 | [diff] [blame] | 52 | #include "main/core.h" /* for struct gl_extensions */ |
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 | { |
Ian Romanick | adfb0cd | 2010-03-10 10:43:16 -0800 | [diff] [blame] | 62 | _mesa_glsl_initialize_variables(instructions, state); |
Kenneth Graunke | 8116835 | 2011-01-01 12:01:09 -0800 | [diff] [blame] | 63 | _mesa_glsl_initialize_functions(state); |
Ian Romanick | adfb0cd | 2010-03-10 10:43:16 -0800 | [diff] [blame] | 64 | |
Kenneth Graunke | 814c89a | 2010-09-05 00:31:28 -0700 | [diff] [blame] | 65 | state->symbols->language_version = state->language_version; |
| 66 | |
Ian Romanick | 41ec6a4 | 2010-03-19 17:08:05 -0700 | [diff] [blame] | 67 | state->current_function = NULL; |
| 68 | |
Kenneth Graunke | a044285 | 2010-08-23 14:52:06 -0700 | [diff] [blame] | 69 | /* Section 4.2 of the GLSL 1.20 specification states: |
| 70 | * "The built-in functions are scoped in a scope outside the global scope |
| 71 | * users declare global variables in. That is, a shader's global scope, |
| 72 | * available for user-defined functions and global variables, is nested |
| 73 | * inside the scope containing the built-in functions." |
| 74 | * |
| 75 | * Since built-in functions like ftransform() access built-in variables, |
| 76 | * it follows that those must be in the outer scope as well. |
| 77 | * |
| 78 | * We push scope here to create this nesting effect...but don't pop. |
| 79 | * This way, a shader's globals are still in the symbol table for use |
| 80 | * by the linker. |
| 81 | */ |
| 82 | state->symbols->push_scope(); |
| 83 | |
Ian Romanick | 2b97dc6 | 2010-05-10 17:42:05 -0700 | [diff] [blame] | 84 | foreach_list_typed (ast_node, ast, link, & state->translation_unit) |
Ian Romanick | 304ea90 | 2010-05-10 11:17:53 -0700 | [diff] [blame] | 85 | ast->hir(instructions, state); |
Ian Romanick | 02c5ae1 | 2011-07-11 10:46:01 -0700 | [diff] [blame^] | 86 | |
| 87 | detect_recursion_unlinked(state, instructions); |
Ian Romanick | d949a9a | 2010-03-10 09:55:22 -0800 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | |
Ian Romanick | 0104536 | 2010-03-29 16:17:56 -0700 | [diff] [blame] | 91 | /** |
| 92 | * If a conversion is available, convert one operand to a different type |
| 93 | * |
| 94 | * The \c from \c ir_rvalue is converted "in place". |
| 95 | * |
| 96 | * \param to Type that the operand it to be converted to |
| 97 | * \param from Operand that is being converted |
| 98 | * \param state GLSL compiler state |
| 99 | * |
| 100 | * \return |
| 101 | * If a conversion is possible (or unnecessary), \c true is returned. |
| 102 | * Otherwise \c false is returned. |
| 103 | */ |
Kenneth Graunke | f32d3df | 2010-09-01 20:03:17 -0700 | [diff] [blame] | 104 | bool |
Ian Romanick | bfb09c2 | 2010-03-29 16:32:55 -0700 | [diff] [blame] | 105 | apply_implicit_conversion(const glsl_type *to, ir_rvalue * &from, |
Ian Romanick | 0104536 | 2010-03-29 16:17:56 -0700 | [diff] [blame] | 106 | struct _mesa_glsl_parse_state *state) |
| 107 | { |
Kenneth Graunke | 953ff12 | 2010-06-25 13:14:37 -0700 | [diff] [blame] | 108 | void *ctx = state; |
Ian Romanick | bfb09c2 | 2010-03-29 16:32:55 -0700 | [diff] [blame] | 109 | if (to->base_type == from->type->base_type) |
Ian Romanick | 0104536 | 2010-03-29 16:17:56 -0700 | [diff] [blame] | 110 | return true; |
| 111 | |
| 112 | /* This conversion was added in GLSL 1.20. If the compilation mode is |
| 113 | * GLSL 1.10, the conversion is skipped. |
| 114 | */ |
| 115 | if (state->language_version < 120) |
| 116 | return false; |
| 117 | |
| 118 | /* From page 27 (page 33 of the PDF) of the GLSL 1.50 spec: |
| 119 | * |
| 120 | * "There are no implicit array or structure conversions. For |
| 121 | * example, an array of int cannot be implicitly converted to an |
| 122 | * array of float. There are no implicit conversions between |
| 123 | * signed and unsigned integers." |
| 124 | */ |
| 125 | /* FINISHME: The above comment is partially a lie. There is int/uint |
| 126 | * FINISHME: conversion for immediate constants. |
| 127 | */ |
Ian Romanick | bfb09c2 | 2010-03-29 16:32:55 -0700 | [diff] [blame] | 128 | if (!to->is_float() || !from->type->is_numeric()) |
Ian Romanick | 0104536 | 2010-03-29 16:17:56 -0700 | [diff] [blame] | 129 | return false; |
| 130 | |
Kenneth Graunke | 506199b | 2010-06-29 15:59:27 -0700 | [diff] [blame] | 131 | /* Convert to a floating point type with the same number of components |
| 132 | * as the original type - i.e. int to float, not int to vec4. |
| 133 | */ |
| 134 | to = glsl_type::get_instance(GLSL_TYPE_FLOAT, from->type->vector_elements, |
| 135 | from->type->matrix_columns); |
| 136 | |
Ian Romanick | bfb09c2 | 2010-03-29 16:32:55 -0700 | [diff] [blame] | 137 | switch (from->type->base_type) { |
Ian Romanick | 0104536 | 2010-03-29 16:17:56 -0700 | [diff] [blame] | 138 | case GLSL_TYPE_INT: |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 139 | from = new(ctx) ir_expression(ir_unop_i2f, to, from, NULL); |
Ian Romanick | 0104536 | 2010-03-29 16:17:56 -0700 | [diff] [blame] | 140 | break; |
| 141 | case GLSL_TYPE_UINT: |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 142 | from = new(ctx) ir_expression(ir_unop_u2f, to, from, NULL); |
Ian Romanick | 0104536 | 2010-03-29 16:17:56 -0700 | [diff] [blame] | 143 | break; |
| 144 | case GLSL_TYPE_BOOL: |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 145 | from = new(ctx) ir_expression(ir_unop_b2f, to, from, NULL); |
Eric Anholt | dc58b3f | 2010-04-02 02:13:43 -1000 | [diff] [blame] | 146 | break; |
Ian Romanick | 0104536 | 2010-03-29 16:17:56 -0700 | [diff] [blame] | 147 | default: |
| 148 | assert(0); |
| 149 | } |
| 150 | |
| 151 | return true; |
| 152 | } |
| 153 | |
| 154 | |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 155 | static const struct glsl_type * |
Ian Romanick | bfb09c2 | 2010-03-29 16:32:55 -0700 | [diff] [blame] | 156 | arithmetic_result_type(ir_rvalue * &value_a, ir_rvalue * &value_b, |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 157 | bool multiply, |
Eric Anholt | a13bb14 | 2010-03-31 16:38:11 -1000 | [diff] [blame] | 158 | struct _mesa_glsl_parse_state *state, YYLTYPE *loc) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 159 | { |
Eric Anholt | 336b4ad | 2010-05-19 10:38:37 -0700 | [diff] [blame] | 160 | const glsl_type *type_a = value_a->type; |
| 161 | const glsl_type *type_b = value_b->type; |
Ian Romanick | 0104536 | 2010-03-29 16:17:56 -0700 | [diff] [blame] | 162 | |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 163 | /* From GLSL 1.50 spec, page 56: |
| 164 | * |
| 165 | * "The arithmetic binary operators add (+), subtract (-), |
| 166 | * multiply (*), and divide (/) operate on integer and |
| 167 | * floating-point scalars, vectors, and matrices." |
| 168 | */ |
Ian Romanick | 60b54d9 | 2010-03-24 17:08:13 -0700 | [diff] [blame] | 169 | if (!type_a->is_numeric() || !type_b->is_numeric()) { |
Eric Anholt | a13bb14 | 2010-03-31 16:38:11 -1000 | [diff] [blame] | 170 | _mesa_glsl_error(loc, state, |
| 171 | "Operands to arithmetic operators must be numeric"); |
Ian Romanick | 0471e8b | 2010-03-26 14:33:41 -0700 | [diff] [blame] | 172 | return glsl_type::error_type; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | |
| 176 | /* "If one operand is floating-point based and the other is |
| 177 | * not, then the conversions from Section 4.1.10 "Implicit |
| 178 | * Conversions" are applied to the non-floating-point-based operand." |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 179 | */ |
Ian Romanick | 0104536 | 2010-03-29 16:17:56 -0700 | [diff] [blame] | 180 | if (!apply_implicit_conversion(type_a, value_b, state) |
| 181 | && !apply_implicit_conversion(type_b, value_a, state)) { |
Eric Anholt | a13bb14 | 2010-03-31 16:38:11 -1000 | [diff] [blame] | 182 | _mesa_glsl_error(loc, state, |
| 183 | "Could not implicitly convert operands to " |
| 184 | "arithmetic operator"); |
Ian Romanick | 0104536 | 2010-03-29 16:17:56 -0700 | [diff] [blame] | 185 | return glsl_type::error_type; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 186 | } |
Eric Anholt | 336b4ad | 2010-05-19 10:38:37 -0700 | [diff] [blame] | 187 | type_a = value_a->type; |
| 188 | type_b = value_b->type; |
| 189 | |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 190 | /* "If the operands are integer types, they must both be signed or |
| 191 | * both be unsigned." |
| 192 | * |
| 193 | * From this rule and the preceeding conversion it can be inferred that |
| 194 | * both types must be GLSL_TYPE_FLOAT, or GLSL_TYPE_UINT, or GLSL_TYPE_INT. |
Ian Romanick | 60b54d9 | 2010-03-24 17:08:13 -0700 | [diff] [blame] | 195 | * The is_numeric check above already filtered out the case where either |
| 196 | * type is not one of these, so now the base types need only be tested for |
| 197 | * equality. |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 198 | */ |
| 199 | if (type_a->base_type != type_b->base_type) { |
Eric Anholt | a13bb14 | 2010-03-31 16:38:11 -1000 | [diff] [blame] | 200 | _mesa_glsl_error(loc, state, |
| 201 | "base type mismatch for arithmetic operator"); |
Ian Romanick | 0471e8b | 2010-03-26 14:33:41 -0700 | [diff] [blame] | 202 | return glsl_type::error_type; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | /* "All arithmetic binary operators result in the same fundamental type |
| 206 | * (signed integer, unsigned integer, or floating-point) as the |
| 207 | * operands they operate on, after operand type conversion. After |
| 208 | * conversion, the following cases are valid |
| 209 | * |
| 210 | * * The two operands are scalars. In this case the operation is |
| 211 | * applied, resulting in a scalar." |
| 212 | */ |
Ian Romanick | cb36f8a | 2010-03-09 15:51:22 -0800 | [diff] [blame] | 213 | if (type_a->is_scalar() && type_b->is_scalar()) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 214 | return type_a; |
| 215 | |
| 216 | /* "* One operand is a scalar, and the other is a vector or matrix. |
| 217 | * In this case, the scalar operation is applied independently to each |
| 218 | * component of the vector or matrix, resulting in the same size |
| 219 | * vector or matrix." |
| 220 | */ |
Ian Romanick | cb36f8a | 2010-03-09 15:51:22 -0800 | [diff] [blame] | 221 | if (type_a->is_scalar()) { |
| 222 | if (!type_b->is_scalar()) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 223 | return type_b; |
Ian Romanick | cb36f8a | 2010-03-09 15:51:22 -0800 | [diff] [blame] | 224 | } else if (type_b->is_scalar()) { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 225 | return type_a; |
| 226 | } |
| 227 | |
| 228 | /* All of the combinations of <scalar, scalar>, <vector, scalar>, |
| 229 | * <scalar, vector>, <scalar, matrix>, and <matrix, scalar> have been |
| 230 | * handled. |
| 231 | */ |
Ian Romanick | 60b54d9 | 2010-03-24 17:08:13 -0700 | [diff] [blame] | 232 | assert(!type_a->is_scalar()); |
| 233 | assert(!type_b->is_scalar()); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 234 | |
| 235 | /* "* The two operands are vectors of the same size. In this case, the |
| 236 | * operation is done component-wise resulting in the same size |
| 237 | * vector." |
| 238 | */ |
Ian Romanick | a2dd22f | 2010-03-09 15:55:16 -0800 | [diff] [blame] | 239 | if (type_a->is_vector() && type_b->is_vector()) { |
Eric Anholt | a13bb14 | 2010-03-31 16:38:11 -1000 | [diff] [blame] | 240 | if (type_a == type_b) { |
| 241 | return type_a; |
| 242 | } else { |
| 243 | _mesa_glsl_error(loc, state, |
| 244 | "vector size mismatch for arithmetic operator"); |
| 245 | return glsl_type::error_type; |
| 246 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 247 | } |
| 248 | |
| 249 | /* All of the combinations of <scalar, scalar>, <vector, scalar>, |
| 250 | * <scalar, vector>, <scalar, matrix>, <matrix, scalar>, and |
| 251 | * <vector, vector> have been handled. At least one of the operands must |
| 252 | * be matrix. Further, since there are no integer matrix types, the base |
| 253 | * type of both operands must be float. |
| 254 | */ |
Ian Romanick | 60b54d9 | 2010-03-24 17:08:13 -0700 | [diff] [blame] | 255 | assert(type_a->is_matrix() || type_b->is_matrix()); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 256 | assert(type_a->base_type == GLSL_TYPE_FLOAT); |
| 257 | assert(type_b->base_type == GLSL_TYPE_FLOAT); |
| 258 | |
| 259 | /* "* The operator is add (+), subtract (-), or divide (/), and the |
| 260 | * operands are matrices with the same number of rows and the same |
| 261 | * number of columns. In this case, the operation is done component- |
| 262 | * wise resulting in the same size matrix." |
| 263 | * * The operator is multiply (*), where both operands are matrices or |
| 264 | * one operand is a vector and the other a matrix. A right vector |
| 265 | * operand is treated as a column vector and a left vector operand as a |
| 266 | * row vector. In all these cases, it is required that the number of |
| 267 | * columns of the left operand is equal to the number of rows of the |
| 268 | * right operand. Then, the multiply (*) operation does a linear |
| 269 | * algebraic multiply, yielding an object that has the same number of |
| 270 | * rows as the left operand and the same number of columns as the right |
| 271 | * operand. Section 5.10 "Vector and Matrix Operations" explains in |
| 272 | * more detail how vectors and matrices are operated on." |
| 273 | */ |
| 274 | if (! multiply) { |
Eric Anholt | a13bb14 | 2010-03-31 16:38:11 -1000 | [diff] [blame] | 275 | if (type_a == type_b) |
| 276 | return type_a; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 277 | } else { |
Ian Romanick | fce1150 | 2010-03-09 15:58:52 -0800 | [diff] [blame] | 278 | if (type_a->is_matrix() && type_b->is_matrix()) { |
Ian Romanick | c1bd3a1 | 2010-03-25 13:06:58 -0700 | [diff] [blame] | 279 | /* Matrix multiply. The columns of A must match the rows of B. Given |
| 280 | * the other previously tested constraints, this means the vector type |
| 281 | * of a row from A must be the same as the vector type of a column from |
| 282 | * B. |
| 283 | */ |
| 284 | if (type_a->row_type() == type_b->column_type()) { |
| 285 | /* The resulting matrix has the number of columns of matrix B and |
| 286 | * the number of rows of matrix A. We get the row count of A by |
| 287 | * looking at the size of a vector that makes up a column. The |
| 288 | * transpose (size of a row) is done for B. |
| 289 | */ |
Eric Anholt | a13bb14 | 2010-03-31 16:38:11 -1000 | [diff] [blame] | 290 | const glsl_type *const type = |
Ian Romanick | c1bd3a1 | 2010-03-25 13:06:58 -0700 | [diff] [blame] | 291 | glsl_type::get_instance(type_a->base_type, |
| 292 | type_a->column_type()->vector_elements, |
| 293 | type_b->row_type()->vector_elements); |
Eric Anholt | a13bb14 | 2010-03-31 16:38:11 -1000 | [diff] [blame] | 294 | assert(type != glsl_type::error_type); |
| 295 | |
| 296 | return type; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 297 | } |
Ian Romanick | fce1150 | 2010-03-09 15:58:52 -0800 | [diff] [blame] | 298 | } else if (type_a->is_matrix()) { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 299 | /* A is a matrix and B is a column vector. Columns of A must match |
Ian Romanick | c1bd3a1 | 2010-03-25 13:06:58 -0700 | [diff] [blame] | 300 | * rows of B. Given the other previously tested constraints, this |
| 301 | * means the vector type of a row from A must be the same as the |
| 302 | * vector the type of B. |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 303 | */ |
Carl Worth | 47c90b1 | 2010-07-22 14:56:14 -0700 | [diff] [blame] | 304 | if (type_a->row_type() == type_b) { |
| 305 | /* The resulting vector has a number of elements equal to |
| 306 | * the number of rows of matrix A. */ |
| 307 | const glsl_type *const type = |
| 308 | glsl_type::get_instance(type_a->base_type, |
| 309 | type_a->column_type()->vector_elements, |
| 310 | 1); |
| 311 | assert(type != glsl_type::error_type); |
| 312 | |
| 313 | return type; |
| 314 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 315 | } else { |
Ian Romanick | fce1150 | 2010-03-09 15:58:52 -0800 | [diff] [blame] | 316 | assert(type_b->is_matrix()); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 317 | |
Ian Romanick | c1bd3a1 | 2010-03-25 13:06:58 -0700 | [diff] [blame] | 318 | /* A is a row vector and B is a matrix. Columns of A must match rows |
| 319 | * of B. Given the other previously tested constraints, this means |
| 320 | * the type of A must be the same as the vector type of a column from |
| 321 | * B. |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 322 | */ |
Carl Worth | 47c90b1 | 2010-07-22 14:56:14 -0700 | [diff] [blame] | 323 | if (type_a == type_b->column_type()) { |
| 324 | /* The resulting vector has a number of elements equal to |
| 325 | * the number of columns of matrix B. */ |
| 326 | const glsl_type *const type = |
| 327 | glsl_type::get_instance(type_a->base_type, |
| 328 | type_b->row_type()->vector_elements, |
| 329 | 1); |
| 330 | assert(type != glsl_type::error_type); |
| 331 | |
| 332 | return type; |
| 333 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 334 | } |
Eric Anholt | a13bb14 | 2010-03-31 16:38:11 -1000 | [diff] [blame] | 335 | |
| 336 | _mesa_glsl_error(loc, state, "size mismatch for matrix multiplication"); |
| 337 | return glsl_type::error_type; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | |
| 341 | /* "All other cases are illegal." |
| 342 | */ |
Eric Anholt | a13bb14 | 2010-03-31 16:38:11 -1000 | [diff] [blame] | 343 | _mesa_glsl_error(loc, state, "type mismatch"); |
Ian Romanick | 0471e8b | 2010-03-26 14:33:41 -0700 | [diff] [blame] | 344 | return glsl_type::error_type; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | |
| 348 | static const struct glsl_type * |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 349 | unary_arithmetic_result_type(const struct glsl_type *type, |
| 350 | struct _mesa_glsl_parse_state *state, YYLTYPE *loc) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 351 | { |
| 352 | /* From GLSL 1.50 spec, page 57: |
| 353 | * |
| 354 | * "The arithmetic unary operators negate (-), post- and pre-increment |
| 355 | * and decrement (-- and ++) operate on integer or floating-point |
| 356 | * values (including vectors and matrices). All unary operators work |
| 357 | * component-wise on their operands. These result with the same type |
| 358 | * they operated on." |
| 359 | */ |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 360 | if (!type->is_numeric()) { |
| 361 | _mesa_glsl_error(loc, state, |
| 362 | "Operands to arithmetic operators must be numeric"); |
Ian Romanick | 0471e8b | 2010-03-26 14:33:41 -0700 | [diff] [blame] | 363 | return glsl_type::error_type; |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 364 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 365 | |
| 366 | return type; |
| 367 | } |
| 368 | |
Chad Versace | cfdbf8b | 2010-10-15 11:28:05 -0700 | [diff] [blame] | 369 | /** |
| 370 | * \brief Return the result type of a bit-logic operation. |
| 371 | * |
| 372 | * If the given types to the bit-logic operator are invalid, return |
| 373 | * glsl_type::error_type. |
| 374 | * |
| 375 | * \param type_a Type of LHS of bit-logic op |
| 376 | * \param type_b Type of RHS of bit-logic op |
| 377 | */ |
| 378 | static const struct glsl_type * |
| 379 | bit_logic_result_type(const struct glsl_type *type_a, |
| 380 | const struct glsl_type *type_b, |
| 381 | ast_operators op, |
| 382 | struct _mesa_glsl_parse_state *state, YYLTYPE *loc) |
| 383 | { |
| 384 | if (state->language_version < 130) { |
| 385 | _mesa_glsl_error(loc, state, "bit operations require GLSL 1.30"); |
| 386 | return glsl_type::error_type; |
| 387 | } |
| 388 | |
| 389 | /* From page 50 (page 56 of PDF) of GLSL 1.30 spec: |
| 390 | * |
| 391 | * "The bitwise operators and (&), exclusive-or (^), and inclusive-or |
| 392 | * (|). The operands must be of type signed or unsigned integers or |
| 393 | * integer vectors." |
| 394 | */ |
| 395 | if (!type_a->is_integer()) { |
| 396 | _mesa_glsl_error(loc, state, "LHS of `%s' must be an integer", |
| 397 | ast_expression::operator_string(op)); |
| 398 | return glsl_type::error_type; |
| 399 | } |
| 400 | if (!type_b->is_integer()) { |
| 401 | _mesa_glsl_error(loc, state, "RHS of `%s' must be an integer", |
| 402 | ast_expression::operator_string(op)); |
| 403 | return glsl_type::error_type; |
| 404 | } |
| 405 | |
| 406 | /* "The fundamental types of the operands (signed or unsigned) must |
| 407 | * match," |
| 408 | */ |
| 409 | if (type_a->base_type != type_b->base_type) { |
| 410 | _mesa_glsl_error(loc, state, "operands of `%s' must have the same " |
| 411 | "base type", ast_expression::operator_string(op)); |
| 412 | return glsl_type::error_type; |
| 413 | } |
| 414 | |
| 415 | /* "The operands cannot be vectors of differing size." */ |
| 416 | if (type_a->is_vector() && |
| 417 | type_b->is_vector() && |
| 418 | type_a->vector_elements != type_b->vector_elements) { |
| 419 | _mesa_glsl_error(loc, state, "operands of `%s' cannot be vectors of " |
| 420 | "different sizes", ast_expression::operator_string(op)); |
| 421 | return glsl_type::error_type; |
| 422 | } |
| 423 | |
| 424 | /* "If one operand is a scalar and the other a vector, the scalar is |
| 425 | * applied component-wise to the vector, resulting in the same type as |
| 426 | * the vector. The fundamental types of the operands [...] will be the |
| 427 | * resulting fundamental type." |
| 428 | */ |
| 429 | if (type_a->is_scalar()) |
| 430 | return type_b; |
| 431 | else |
| 432 | return type_a; |
| 433 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 434 | |
| 435 | static const struct glsl_type * |
| 436 | modulus_result_type(const struct glsl_type *type_a, |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 437 | const struct glsl_type *type_b, |
| 438 | struct _mesa_glsl_parse_state *state, YYLTYPE *loc) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 439 | { |
Chad Versace | 82f994f | 2011-02-04 12:18:56 -0800 | [diff] [blame] | 440 | if (state->language_version < 130) { |
| 441 | _mesa_glsl_error(loc, state, |
| 442 | "operator '%%' is reserved in %s", |
| 443 | state->version_string); |
| 444 | return glsl_type::error_type; |
| 445 | } |
| 446 | |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 447 | /* From GLSL 1.50 spec, page 56: |
| 448 | * "The operator modulus (%) operates on signed or unsigned integers or |
| 449 | * integer vectors. The operand types must both be signed or both be |
| 450 | * unsigned." |
| 451 | */ |
Kenneth Graunke | 8eb9753 | 2011-06-14 22:21:41 -0700 | [diff] [blame] | 452 | if (!type_a->is_integer()) { |
| 453 | _mesa_glsl_error(loc, state, "LHS of operator %% must be an integer."); |
| 454 | return glsl_type::error_type; |
| 455 | } |
| 456 | if (!type_b->is_integer()) { |
| 457 | _mesa_glsl_error(loc, state, "RHS of operator %% must be an integer."); |
| 458 | return glsl_type::error_type; |
| 459 | } |
| 460 | if (type_a->base_type != type_b->base_type) { |
| 461 | _mesa_glsl_error(loc, state, |
| 462 | "operands of %% must have the same base type"); |
Ian Romanick | 0471e8b | 2010-03-26 14:33:41 -0700 | [diff] [blame] | 463 | return glsl_type::error_type; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | /* "The operands cannot be vectors of differing size. If one operand is |
| 467 | * a scalar and the other vector, then the scalar is applied component- |
| 468 | * wise to the vector, resulting in the same type as the vector. If both |
| 469 | * are vectors of the same size, the result is computed component-wise." |
| 470 | */ |
Ian Romanick | a2dd22f | 2010-03-09 15:55:16 -0800 | [diff] [blame] | 471 | if (type_a->is_vector()) { |
| 472 | if (!type_b->is_vector() |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 473 | || (type_a->vector_elements == type_b->vector_elements)) |
| 474 | return type_a; |
| 475 | } else |
| 476 | return type_b; |
| 477 | |
| 478 | /* "The operator modulus (%) is not defined for any other data types |
| 479 | * (non-integer types)." |
| 480 | */ |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 481 | _mesa_glsl_error(loc, state, "type mismatch"); |
Ian Romanick | 0471e8b | 2010-03-26 14:33:41 -0700 | [diff] [blame] | 482 | return glsl_type::error_type; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 483 | } |
| 484 | |
| 485 | |
| 486 | static const struct glsl_type * |
Ian Romanick | bfb09c2 | 2010-03-29 16:32:55 -0700 | [diff] [blame] | 487 | relational_result_type(ir_rvalue * &value_a, ir_rvalue * &value_b, |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 488 | struct _mesa_glsl_parse_state *state, YYLTYPE *loc) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 489 | { |
Eric Anholt | 336b4ad | 2010-05-19 10:38:37 -0700 | [diff] [blame] | 490 | const glsl_type *type_a = value_a->type; |
| 491 | const glsl_type *type_b = value_b->type; |
Ian Romanick | 0150f5f | 2010-03-29 16:20:07 -0700 | [diff] [blame] | 492 | |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 493 | /* From GLSL 1.50 spec, page 56: |
| 494 | * "The relational operators greater than (>), less than (<), greater |
| 495 | * than or equal (>=), and less than or equal (<=) operate only on |
| 496 | * scalar integer and scalar floating-point expressions." |
| 497 | */ |
Ian Romanick | a6d653d | 2010-03-26 14:40:37 -0700 | [diff] [blame] | 498 | if (!type_a->is_numeric() |
| 499 | || !type_b->is_numeric() |
Ian Romanick | cb36f8a | 2010-03-09 15:51:22 -0800 | [diff] [blame] | 500 | || !type_a->is_scalar() |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 501 | || !type_b->is_scalar()) { |
| 502 | _mesa_glsl_error(loc, state, |
| 503 | "Operands to relational operators must be scalar and " |
| 504 | "numeric"); |
Ian Romanick | 0471e8b | 2010-03-26 14:33:41 -0700 | [diff] [blame] | 505 | return glsl_type::error_type; |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 506 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 507 | |
| 508 | /* "Either the operands' types must match, or the conversions from |
| 509 | * Section 4.1.10 "Implicit Conversions" will be applied to the integer |
| 510 | * operand, after which the types must match." |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 511 | */ |
Ian Romanick | 0150f5f | 2010-03-29 16:20:07 -0700 | [diff] [blame] | 512 | if (!apply_implicit_conversion(type_a, value_b, state) |
| 513 | && !apply_implicit_conversion(type_b, value_a, state)) { |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 514 | _mesa_glsl_error(loc, state, |
| 515 | "Could not implicitly convert operands to " |
| 516 | "relational operator"); |
Ian Romanick | 0150f5f | 2010-03-29 16:20:07 -0700 | [diff] [blame] | 517 | return glsl_type::error_type; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 518 | } |
Eric Anholt | 336b4ad | 2010-05-19 10:38:37 -0700 | [diff] [blame] | 519 | type_a = value_a->type; |
| 520 | type_b = value_b->type; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 521 | |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 522 | if (type_a->base_type != type_b->base_type) { |
| 523 | _mesa_glsl_error(loc, state, "base type mismatch"); |
Ian Romanick | 0471e8b | 2010-03-26 14:33:41 -0700 | [diff] [blame] | 524 | return glsl_type::error_type; |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 525 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 526 | |
| 527 | /* "The result is scalar Boolean." |
| 528 | */ |
Ian Romanick | 0471e8b | 2010-03-26 14:33:41 -0700 | [diff] [blame] | 529 | return glsl_type::bool_type; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 530 | } |
| 531 | |
Chad Versace | c0197ab | 2010-10-15 09:49:46 -0700 | [diff] [blame] | 532 | /** |
| 533 | * \brief Return the result type of a bit-shift operation. |
| 534 | * |
| 535 | * If the given types to the bit-shift operator are invalid, return |
| 536 | * glsl_type::error_type. |
| 537 | * |
| 538 | * \param type_a Type of LHS of bit-shift op |
| 539 | * \param type_b Type of RHS of bit-shift op |
| 540 | */ |
| 541 | static const struct glsl_type * |
| 542 | shift_result_type(const struct glsl_type *type_a, |
| 543 | const struct glsl_type *type_b, |
| 544 | ast_operators op, |
| 545 | struct _mesa_glsl_parse_state *state, YYLTYPE *loc) |
| 546 | { |
| 547 | if (state->language_version < 130) { |
| 548 | _mesa_glsl_error(loc, state, "bit operations require GLSL 1.30"); |
| 549 | return glsl_type::error_type; |
| 550 | } |
| 551 | |
| 552 | /* From page 50 (page 56 of the PDF) of the GLSL 1.30 spec: |
| 553 | * |
| 554 | * "The shift operators (<<) and (>>). For both operators, the operands |
| 555 | * must be signed or unsigned integers or integer vectors. One operand |
| 556 | * can be signed while the other is unsigned." |
| 557 | */ |
| 558 | if (!type_a->is_integer()) { |
| 559 | _mesa_glsl_error(loc, state, "LHS of operator %s must be an integer or " |
| 560 | "integer vector", ast_expression::operator_string(op)); |
| 561 | return glsl_type::error_type; |
| 562 | |
| 563 | } |
| 564 | if (!type_b->is_integer()) { |
| 565 | _mesa_glsl_error(loc, state, "RHS of operator %s must be an integer or " |
| 566 | "integer vector", ast_expression::operator_string(op)); |
| 567 | return glsl_type::error_type; |
| 568 | } |
| 569 | |
| 570 | /* "If the first operand is a scalar, the second operand has to be |
| 571 | * a scalar as well." |
| 572 | */ |
| 573 | if (type_a->is_scalar() && !type_b->is_scalar()) { |
| 574 | _mesa_glsl_error(loc, state, "If the first operand of %s is scalar, the " |
| 575 | "second must be scalar as well", |
| 576 | ast_expression::operator_string(op)); |
| 577 | return glsl_type::error_type; |
| 578 | } |
| 579 | |
| 580 | /* If both operands are vectors, check that they have same number of |
| 581 | * elements. |
| 582 | */ |
| 583 | if (type_a->is_vector() && |
| 584 | type_b->is_vector() && |
| 585 | type_a->vector_elements != type_b->vector_elements) { |
| 586 | _mesa_glsl_error(loc, state, "Vector operands to operator %s must " |
| 587 | "have same number of elements", |
| 588 | ast_expression::operator_string(op)); |
| 589 | return glsl_type::error_type; |
| 590 | } |
| 591 | |
| 592 | /* "In all cases, the resulting type will be the same type as the left |
| 593 | * operand." |
| 594 | */ |
| 595 | return type_a; |
| 596 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 597 | |
Ian Romanick | 0bb1c3c | 2010-03-23 13:23:31 -0700 | [diff] [blame] | 598 | /** |
| 599 | * Validates that a value can be assigned to a location with a specified type |
| 600 | * |
| 601 | * Validates that \c rhs can be assigned to some location. If the types are |
| 602 | * not an exact match but an automatic conversion is possible, \c rhs will be |
| 603 | * converted. |
| 604 | * |
| 605 | * \return |
| 606 | * \c NULL if \c rhs cannot be assigned to a location with type \c lhs_type. |
| 607 | * Otherwise the actual RHS to be assigned will be returned. This may be |
| 608 | * \c rhs, or it may be \c rhs after some type conversion. |
| 609 | * |
| 610 | * \note |
| 611 | * In addition to being used for assignments, this function is used to |
| 612 | * type-check return values. |
| 613 | */ |
Kenneth Graunke | fb9fb5f | 2010-03-26 00:25:36 -0700 | [diff] [blame] | 614 | ir_rvalue * |
Eric Anholt | 336b4ad | 2010-05-19 10:38:37 -0700 | [diff] [blame] | 615 | validate_assignment(struct _mesa_glsl_parse_state *state, |
Ian Romanick | 85caea2 | 2011-03-15 16:33:27 -0700 | [diff] [blame] | 616 | const glsl_type *lhs_type, ir_rvalue *rhs, |
| 617 | bool is_initializer) |
Ian Romanick | 0bb1c3c | 2010-03-23 13:23:31 -0700 | [diff] [blame] | 618 | { |
Ian Romanick | 0bb1c3c | 2010-03-23 13:23:31 -0700 | [diff] [blame] | 619 | /* If there is already some error in the RHS, just return it. Anything |
| 620 | * else will lead to an avalanche of error message back to the user. |
| 621 | */ |
Ian Romanick | ec53010 | 2010-12-10 15:47:11 -0800 | [diff] [blame] | 622 | if (rhs->type->is_error()) |
Ian Romanick | 0bb1c3c | 2010-03-23 13:23:31 -0700 | [diff] [blame] | 623 | return rhs; |
| 624 | |
Ian Romanick | 0bb1c3c | 2010-03-23 13:23:31 -0700 | [diff] [blame] | 625 | /* If the types are identical, the assignment can trivially proceed. |
| 626 | */ |
Ian Romanick | ec53010 | 2010-12-10 15:47:11 -0800 | [diff] [blame] | 627 | if (rhs->type == lhs_type) |
Ian Romanick | 0bb1c3c | 2010-03-23 13:23:31 -0700 | [diff] [blame] | 628 | return rhs; |
| 629 | |
Ian Romanick | 0157f41 | 2010-04-02 17:44:39 -0700 | [diff] [blame] | 630 | /* If the array element types are the same and the size of the LHS is zero, |
Ian Romanick | 85caea2 | 2011-03-15 16:33:27 -0700 | [diff] [blame] | 631 | * the assignment is okay for initializers embedded in variable |
| 632 | * declarations. |
Ian Romanick | 0157f41 | 2010-04-02 17:44:39 -0700 | [diff] [blame] | 633 | * |
| 634 | * Note: Whole-array assignments are not permitted in GLSL 1.10, but this |
| 635 | * is handled by ir_dereference::is_lvalue. |
| 636 | */ |
Ian Romanick | 85caea2 | 2011-03-15 16:33:27 -0700 | [diff] [blame] | 637 | if (is_initializer && lhs_type->is_array() && rhs->type->is_array() |
Ian Romanick | 0157f41 | 2010-04-02 17:44:39 -0700 | [diff] [blame] | 638 | && (lhs_type->element_type() == rhs->type->element_type()) |
| 639 | && (lhs_type->array_size() == 0)) { |
| 640 | return rhs; |
| 641 | } |
| 642 | |
Eric Anholt | 336b4ad | 2010-05-19 10:38:37 -0700 | [diff] [blame] | 643 | /* Check for implicit conversion in GLSL 1.20 */ |
| 644 | if (apply_implicit_conversion(lhs_type, rhs, state)) { |
Ian Romanick | ec53010 | 2010-12-10 15:47:11 -0800 | [diff] [blame] | 645 | if (rhs->type == lhs_type) |
Eric Anholt | 336b4ad | 2010-05-19 10:38:37 -0700 | [diff] [blame] | 646 | return rhs; |
| 647 | } |
| 648 | |
Ian Romanick | 0bb1c3c | 2010-03-23 13:23:31 -0700 | [diff] [blame] | 649 | return NULL; |
| 650 | } |
| 651 | |
Eric Anholt | 10a6852 | 2010-03-26 11:53:37 -0700 | [diff] [blame] | 652 | ir_rvalue * |
| 653 | do_assignment(exec_list *instructions, struct _mesa_glsl_parse_state *state, |
Ian Romanick | 85caea2 | 2011-03-15 16:33:27 -0700 | [diff] [blame] | 654 | ir_rvalue *lhs, ir_rvalue *rhs, bool is_initializer, |
Eric Anholt | 10a6852 | 2010-03-26 11:53:37 -0700 | [diff] [blame] | 655 | YYLTYPE lhs_loc) |
| 656 | { |
Kenneth Graunke | 953ff12 | 2010-06-25 13:14:37 -0700 | [diff] [blame] | 657 | void *ctx = state; |
Eric Anholt | 10a6852 | 2010-03-26 11:53:37 -0700 | [diff] [blame] | 658 | bool error_emitted = (lhs->type->is_error() || rhs->type->is_error()); |
| 659 | |
| 660 | if (!error_emitted) { |
Chad Versace | b66be75 | 2011-01-21 13:44:08 -0800 | [diff] [blame] | 661 | if (lhs->variable_referenced() != NULL |
| 662 | && lhs->variable_referenced()->read_only) { |
| 663 | _mesa_glsl_error(&lhs_loc, state, |
| 664 | "assignment to read-only variable '%s'", |
| 665 | lhs->variable_referenced()->name); |
| 666 | error_emitted = true; |
| 667 | |
| 668 | } else if (!lhs->is_lvalue()) { |
Eric Anholt | 10a6852 | 2010-03-26 11:53:37 -0700 | [diff] [blame] | 669 | _mesa_glsl_error(& lhs_loc, state, "non-lvalue in assignment"); |
| 670 | error_emitted = true; |
| 671 | } |
Kenneth Graunke | 10eaa8b | 2010-09-07 02:59:38 -0700 | [diff] [blame] | 672 | |
| 673 | if (state->es_shader && lhs->type->is_array()) { |
| 674 | _mesa_glsl_error(&lhs_loc, state, "whole array assignment is not " |
| 675 | "allowed in GLSL ES 1.00."); |
| 676 | error_emitted = true; |
| 677 | } |
Eric Anholt | 10a6852 | 2010-03-26 11:53:37 -0700 | [diff] [blame] | 678 | } |
| 679 | |
Ian Romanick | 85caea2 | 2011-03-15 16:33:27 -0700 | [diff] [blame] | 680 | ir_rvalue *new_rhs = |
| 681 | validate_assignment(state, lhs->type, rhs, is_initializer); |
Eric Anholt | 10a6852 | 2010-03-26 11:53:37 -0700 | [diff] [blame] | 682 | if (new_rhs == NULL) { |
| 683 | _mesa_glsl_error(& lhs_loc, state, "type mismatch"); |
| 684 | } else { |
| 685 | rhs = new_rhs; |
Ian Romanick | 0157f41 | 2010-04-02 17:44:39 -0700 | [diff] [blame] | 686 | |
| 687 | /* If the LHS array was not declared with a size, it takes it size from |
| 688 | * the RHS. If the LHS is an l-value and a whole array, it must be a |
| 689 | * dereference of a variable. Any other case would require that the LHS |
| 690 | * is either not an l-value or not a whole array. |
| 691 | */ |
| 692 | if (lhs->type->array_size() == 0) { |
| 693 | ir_dereference *const d = lhs->as_dereference(); |
| 694 | |
| 695 | assert(d != NULL); |
| 696 | |
Ian Romanick | 36ea286 | 2010-05-19 13:52:29 +0200 | [diff] [blame] | 697 | ir_variable *const var = d->variable_referenced(); |
Ian Romanick | 0157f41 | 2010-04-02 17:44:39 -0700 | [diff] [blame] | 698 | |
| 699 | assert(var != NULL); |
| 700 | |
Ian Romanick | 63f3942 | 2010-04-05 14:35:47 -0700 | [diff] [blame] | 701 | if (var->max_array_access >= unsigned(rhs->type->array_size())) { |
| 702 | /* FINISHME: This should actually log the location of the RHS. */ |
| 703 | _mesa_glsl_error(& lhs_loc, state, "array size must be > %u due to " |
| 704 | "previous access", |
| 705 | var->max_array_access); |
| 706 | } |
| 707 | |
Ian Romanick | f38d15b | 2010-07-20 15:33:40 -0700 | [diff] [blame] | 708 | var->type = glsl_type::get_array_instance(lhs->type->element_type(), |
Ian Romanick | 0157f41 | 2010-04-02 17:44:39 -0700 | [diff] [blame] | 709 | rhs->type->array_size()); |
Eric Anholt | 9703ed0 | 2010-07-22 15:50:37 -0700 | [diff] [blame] | 710 | d->type = var->type; |
Ian Romanick | 0157f41 | 2010-04-02 17:44:39 -0700 | [diff] [blame] | 711 | } |
Eric Anholt | 10a6852 | 2010-03-26 11:53:37 -0700 | [diff] [blame] | 712 | } |
| 713 | |
Eric Anholt | 2731a73 | 2010-06-23 14:51:14 -0700 | [diff] [blame] | 714 | /* Most callers of do_assignment (assign, add_assign, pre_inc/dec, |
| 715 | * but not post_inc) need the converted assigned value as an rvalue |
| 716 | * to handle things like: |
| 717 | * |
| 718 | * i = j += 1; |
| 719 | * |
| 720 | * So we always just store the computed value being assigned to a |
| 721 | * temporary and return a deref of that temporary. If the rvalue |
| 722 | * ends up not being used, the temp will get copy-propagated out. |
| 723 | */ |
Ian Romanick | 7e2aa91 | 2010-07-19 17:12:42 -0700 | [diff] [blame] | 724 | ir_variable *var = new(ctx) ir_variable(rhs->type, "assignment_tmp", |
| 725 | ir_var_temporary); |
Eric Anholt | e33c103 | 2010-06-24 15:13:03 -0700 | [diff] [blame] | 726 | ir_dereference_variable *deref_var = new(ctx) ir_dereference_variable(var); |
Eric Anholt | ae80592 | 2010-06-24 09:06:12 -0700 | [diff] [blame] | 727 | instructions->push_tail(var); |
Eric Anholt | e33c103 | 2010-06-24 15:13:03 -0700 | [diff] [blame] | 728 | instructions->push_tail(new(ctx) ir_assignment(deref_var, |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 729 | rhs, |
| 730 | NULL)); |
Eric Anholt | e33c103 | 2010-06-24 15:13:03 -0700 | [diff] [blame] | 731 | deref_var = new(ctx) ir_dereference_variable(var); |
Eric Anholt | 10a6852 | 2010-03-26 11:53:37 -0700 | [diff] [blame] | 732 | |
Ian Romanick | 8e9ce2e | 2010-08-03 15:02:35 -0700 | [diff] [blame] | 733 | if (!error_emitted) |
| 734 | instructions->push_tail(new(ctx) ir_assignment(lhs, deref_var, NULL)); |
Eric Anholt | 2731a73 | 2010-06-23 14:51:14 -0700 | [diff] [blame] | 735 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 736 | return new(ctx) ir_dereference_variable(var); |
Eric Anholt | 10a6852 | 2010-03-26 11:53:37 -0700 | [diff] [blame] | 737 | } |
Ian Romanick | 0bb1c3c | 2010-03-23 13:23:31 -0700 | [diff] [blame] | 738 | |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 739 | static ir_rvalue * |
Eric Anholt | 959a9ec | 2010-06-23 14:43:50 -0700 | [diff] [blame] | 740 | get_lvalue_copy(exec_list *instructions, ir_rvalue *lvalue) |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 741 | { |
Kenneth Graunke | d3073f5 | 2011-01-21 14:32:31 -0800 | [diff] [blame] | 742 | void *ctx = ralloc_parent(lvalue); |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 743 | ir_variable *var; |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 744 | |
Ian Romanick | 7e2aa91 | 2010-07-19 17:12:42 -0700 | [diff] [blame] | 745 | var = new(ctx) ir_variable(lvalue->type, "_post_incdec_tmp", |
| 746 | ir_var_temporary); |
Eric Anholt | 43b5b03 | 2010-07-07 14:04:30 -0700 | [diff] [blame] | 747 | instructions->push_tail(var); |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 748 | var->mode = ir_var_auto; |
| 749 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 750 | instructions->push_tail(new(ctx) ir_assignment(new(ctx) ir_dereference_variable(var), |
| 751 | lvalue, NULL)); |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 752 | |
| 753 | /* Once we've created this temporary, mark it read only so it's no |
| 754 | * longer considered an lvalue. |
| 755 | */ |
| 756 | var->read_only = true; |
| 757 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 758 | return new(ctx) ir_dereference_variable(var); |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 759 | } |
| 760 | |
| 761 | |
Kenneth Graunke | fb9fb5f | 2010-03-26 00:25:36 -0700 | [diff] [blame] | 762 | ir_rvalue * |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 763 | ast_node::hir(exec_list *instructions, |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 764 | struct _mesa_glsl_parse_state *state) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 765 | { |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 766 | (void) instructions; |
| 767 | (void) state; |
| 768 | |
| 769 | return NULL; |
| 770 | } |
| 771 | |
Eric Anholt | b4f5856 | 2010-12-01 15:55:53 -0800 | [diff] [blame] | 772 | static void |
| 773 | mark_whole_array_access(ir_rvalue *access) |
| 774 | { |
| 775 | ir_dereference_variable *deref = access->as_dereference_variable(); |
| 776 | |
| 777 | if (deref) { |
| 778 | deref->var->max_array_access = deref->type->length - 1; |
| 779 | } |
| 780 | } |
| 781 | |
Eric Anholt | ff79633 | 2010-11-30 11:23:28 -0800 | [diff] [blame] | 782 | static ir_rvalue * |
| 783 | do_comparison(void *mem_ctx, int operation, ir_rvalue *op0, ir_rvalue *op1) |
| 784 | { |
| 785 | int join_op; |
Ian Romanick | 6d36be5 | 2010-12-02 12:17:36 -0800 | [diff] [blame] | 786 | ir_rvalue *cmp = NULL; |
Eric Anholt | ff79633 | 2010-11-30 11:23:28 -0800 | [diff] [blame] | 787 | |
| 788 | if (operation == ir_binop_all_equal) |
| 789 | join_op = ir_binop_logic_and; |
| 790 | else |
| 791 | join_op = ir_binop_logic_or; |
| 792 | |
| 793 | switch (op0->type->base_type) { |
| 794 | case GLSL_TYPE_FLOAT: |
| 795 | case GLSL_TYPE_UINT: |
| 796 | case GLSL_TYPE_INT: |
| 797 | case GLSL_TYPE_BOOL: |
| 798 | return new(mem_ctx) ir_expression(operation, op0, op1); |
| 799 | |
| 800 | case GLSL_TYPE_ARRAY: { |
Eric Anholt | ff79633 | 2010-11-30 11:23:28 -0800 | [diff] [blame] | 801 | for (unsigned int i = 0; i < op0->type->length; i++) { |
| 802 | ir_rvalue *e0, *e1, *result; |
| 803 | |
| 804 | e0 = new(mem_ctx) ir_dereference_array(op0->clone(mem_ctx, NULL), |
| 805 | new(mem_ctx) ir_constant(i)); |
| 806 | e1 = new(mem_ctx) ir_dereference_array(op1->clone(mem_ctx, NULL), |
| 807 | new(mem_ctx) ir_constant(i)); |
| 808 | result = do_comparison(mem_ctx, operation, e0, e1); |
| 809 | |
Ian Romanick | 6d36be5 | 2010-12-02 12:17:36 -0800 | [diff] [blame] | 810 | if (cmp) { |
| 811 | cmp = new(mem_ctx) ir_expression(join_op, cmp, result); |
Eric Anholt | ff79633 | 2010-11-30 11:23:28 -0800 | [diff] [blame] | 812 | } else { |
Ian Romanick | 6d36be5 | 2010-12-02 12:17:36 -0800 | [diff] [blame] | 813 | cmp = result; |
Eric Anholt | ff79633 | 2010-11-30 11:23:28 -0800 | [diff] [blame] | 814 | } |
| 815 | } |
Eric Anholt | b4f5856 | 2010-12-01 15:55:53 -0800 | [diff] [blame] | 816 | |
| 817 | mark_whole_array_access(op0); |
| 818 | mark_whole_array_access(op1); |
Ian Romanick | 6d36be5 | 2010-12-02 12:17:36 -0800 | [diff] [blame] | 819 | break; |
Eric Anholt | ff79633 | 2010-11-30 11:23:28 -0800 | [diff] [blame] | 820 | } |
| 821 | |
| 822 | case GLSL_TYPE_STRUCT: { |
Eric Anholt | ff79633 | 2010-11-30 11:23:28 -0800 | [diff] [blame] | 823 | for (unsigned int i = 0; i < op0->type->length; i++) { |
| 824 | ir_rvalue *e0, *e1, *result; |
| 825 | const char *field_name = op0->type->fields.structure[i].name; |
| 826 | |
| 827 | e0 = new(mem_ctx) ir_dereference_record(op0->clone(mem_ctx, NULL), |
| 828 | field_name); |
| 829 | e1 = new(mem_ctx) ir_dereference_record(op1->clone(mem_ctx, NULL), |
| 830 | field_name); |
| 831 | result = do_comparison(mem_ctx, operation, e0, e1); |
| 832 | |
Ian Romanick | 6d36be5 | 2010-12-02 12:17:36 -0800 | [diff] [blame] | 833 | if (cmp) { |
| 834 | cmp = new(mem_ctx) ir_expression(join_op, cmp, result); |
Eric Anholt | ff79633 | 2010-11-30 11:23:28 -0800 | [diff] [blame] | 835 | } else { |
Ian Romanick | 6d36be5 | 2010-12-02 12:17:36 -0800 | [diff] [blame] | 836 | cmp = result; |
Eric Anholt | ff79633 | 2010-11-30 11:23:28 -0800 | [diff] [blame] | 837 | } |
| 838 | } |
Ian Romanick | 6d36be5 | 2010-12-02 12:17:36 -0800 | [diff] [blame] | 839 | break; |
Eric Anholt | ff79633 | 2010-11-30 11:23:28 -0800 | [diff] [blame] | 840 | } |
| 841 | |
| 842 | case GLSL_TYPE_ERROR: |
| 843 | case GLSL_TYPE_VOID: |
| 844 | case GLSL_TYPE_SAMPLER: |
| 845 | /* I assume a comparison of a struct containing a sampler just |
| 846 | * ignores the sampler present in the type. |
| 847 | */ |
Ian Romanick | 6d36be5 | 2010-12-02 12:17:36 -0800 | [diff] [blame] | 848 | break; |
| 849 | |
| 850 | default: |
| 851 | assert(!"Should not get here."); |
| 852 | break; |
Eric Anholt | ff79633 | 2010-11-30 11:23:28 -0800 | [diff] [blame] | 853 | } |
Eric Anholt | d56c974 | 2010-11-30 13:28:47 -0800 | [diff] [blame] | 854 | |
Ian Romanick | 6d36be5 | 2010-12-02 12:17:36 -0800 | [diff] [blame] | 855 | if (cmp == NULL) |
| 856 | cmp = new(mem_ctx) ir_constant(true); |
| 857 | |
| 858 | return cmp; |
Eric Anholt | ff79633 | 2010-11-30 11:23:28 -0800 | [diff] [blame] | 859 | } |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 860 | |
Eric Anholt | 0182270 | 2011-04-09 15:59:20 -1000 | [diff] [blame] | 861 | /* For logical operations, we want to ensure that the operands are |
| 862 | * scalar booleans. If it isn't, emit an error and return a constant |
| 863 | * boolean to avoid triggering cascading error messages. |
| 864 | */ |
| 865 | ir_rvalue * |
| 866 | get_scalar_boolean_operand(exec_list *instructions, |
| 867 | struct _mesa_glsl_parse_state *state, |
| 868 | ast_expression *parent_expr, |
| 869 | int operand, |
| 870 | const char *operand_name, |
| 871 | bool *error_emitted) |
| 872 | { |
| 873 | ast_expression *expr = parent_expr->subexpressions[operand]; |
| 874 | void *ctx = state; |
| 875 | ir_rvalue *val = expr->hir(instructions, state); |
| 876 | |
| 877 | if (val->type->is_boolean() && val->type->is_scalar()) |
| 878 | return val; |
| 879 | |
| 880 | if (!*error_emitted) { |
| 881 | YYLTYPE loc = expr->get_location(); |
| 882 | _mesa_glsl_error(&loc, state, "%s of `%s' must be scalar boolean", |
| 883 | operand_name, |
| 884 | parent_expr->operator_string(parent_expr->oper)); |
| 885 | *error_emitted = true; |
| 886 | } |
| 887 | |
| 888 | return new(ctx) ir_constant(true); |
| 889 | } |
| 890 | |
Kenneth Graunke | fb9fb5f | 2010-03-26 00:25:36 -0700 | [diff] [blame] | 891 | ir_rvalue * |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 892 | ast_expression::hir(exec_list *instructions, |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 893 | struct _mesa_glsl_parse_state *state) |
| 894 | { |
Kenneth Graunke | 953ff12 | 2010-06-25 13:14:37 -0700 | [diff] [blame] | 895 | void *ctx = state; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 896 | static const int operations[AST_NUM_OPERATORS] = { |
| 897 | -1, /* ast_assign doesn't convert to ir_expression. */ |
| 898 | -1, /* ast_plus doesn't convert to ir_expression. */ |
| 899 | ir_unop_neg, |
| 900 | ir_binop_add, |
| 901 | ir_binop_sub, |
| 902 | ir_binop_mul, |
| 903 | ir_binop_div, |
| 904 | ir_binop_mod, |
| 905 | ir_binop_lshift, |
| 906 | ir_binop_rshift, |
| 907 | ir_binop_less, |
| 908 | ir_binop_greater, |
| 909 | ir_binop_lequal, |
| 910 | ir_binop_gequal, |
Luca Barbieri | 4dfb899 | 2010-09-08 01:31:39 +0200 | [diff] [blame] | 911 | ir_binop_all_equal, |
| 912 | ir_binop_any_nequal, |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 913 | ir_binop_bit_and, |
| 914 | ir_binop_bit_xor, |
| 915 | ir_binop_bit_or, |
| 916 | ir_unop_bit_not, |
| 917 | ir_binop_logic_and, |
| 918 | ir_binop_logic_xor, |
| 919 | ir_binop_logic_or, |
| 920 | ir_unop_logic_not, |
| 921 | |
| 922 | /* Note: The following block of expression types actually convert |
| 923 | * to multiple IR instructions. |
| 924 | */ |
| 925 | ir_binop_mul, /* ast_mul_assign */ |
| 926 | ir_binop_div, /* ast_div_assign */ |
| 927 | ir_binop_mod, /* ast_mod_assign */ |
| 928 | ir_binop_add, /* ast_add_assign */ |
| 929 | ir_binop_sub, /* ast_sub_assign */ |
| 930 | ir_binop_lshift, /* ast_ls_assign */ |
| 931 | ir_binop_rshift, /* ast_rs_assign */ |
| 932 | ir_binop_bit_and, /* ast_and_assign */ |
| 933 | ir_binop_bit_xor, /* ast_xor_assign */ |
| 934 | ir_binop_bit_or, /* ast_or_assign */ |
| 935 | |
| 936 | -1, /* ast_conditional doesn't convert to ir_expression. */ |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 937 | ir_binop_add, /* ast_pre_inc. */ |
| 938 | ir_binop_sub, /* ast_pre_dec. */ |
| 939 | ir_binop_add, /* ast_post_inc. */ |
| 940 | ir_binop_sub, /* ast_post_dec. */ |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 941 | -1, /* ast_field_selection doesn't conv to ir_expression. */ |
| 942 | -1, /* ast_array_index doesn't convert to ir_expression. */ |
| 943 | -1, /* ast_function_call doesn't conv to ir_expression. */ |
| 944 | -1, /* ast_identifier doesn't convert to ir_expression. */ |
| 945 | -1, /* ast_int_constant doesn't convert to ir_expression. */ |
| 946 | -1, /* ast_uint_constant doesn't conv to ir_expression. */ |
| 947 | -1, /* ast_float_constant doesn't conv to ir_expression. */ |
| 948 | -1, /* ast_bool_constant doesn't conv to ir_expression. */ |
| 949 | -1, /* ast_sequence doesn't convert to ir_expression. */ |
| 950 | }; |
Kenneth Graunke | fb9fb5f | 2010-03-26 00:25:36 -0700 | [diff] [blame] | 951 | ir_rvalue *result = NULL; |
Aras Pranckevicius | 1c325af | 2010-07-29 15:35:22 +0300 | [diff] [blame] | 952 | ir_rvalue *op[3]; |
Kenneth Graunke | 08ba977 | 2011-04-14 17:21:59 -0700 | [diff] [blame] | 953 | const struct glsl_type *type; /* a temporary variable for switch cases */ |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 954 | bool error_emitted = false; |
| 955 | YYLTYPE loc; |
| 956 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 957 | loc = this->get_location(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 958 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 959 | switch (this->oper) { |
Ian Romanick | 6652af3 | 2010-03-09 16:38:02 -0800 | [diff] [blame] | 960 | case ast_assign: { |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 961 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 962 | op[1] = this->subexpressions[1]->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 963 | |
Ian Romanick | 85caea2 | 2011-03-15 16:33:27 -0700 | [diff] [blame] | 964 | result = do_assignment(instructions, state, op[0], op[1], false, |
Eric Anholt | 10a6852 | 2010-03-26 11:53:37 -0700 | [diff] [blame] | 965 | this->subexpressions[0]->get_location()); |
| 966 | error_emitted = result->type->is_error(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 967 | break; |
Ian Romanick | 6652af3 | 2010-03-09 16:38:02 -0800 | [diff] [blame] | 968 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 969 | |
| 970 | case ast_plus: |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 971 | op[0] = this->subexpressions[0]->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 972 | |
Carl Worth | c24bcad | 2010-07-21 11:23:51 -0700 | [diff] [blame] | 973 | type = unary_arithmetic_result_type(op[0]->type, state, & loc); |
| 974 | |
| 975 | error_emitted = type->is_error(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 976 | |
| 977 | result = op[0]; |
| 978 | break; |
| 979 | |
| 980 | case ast_neg: |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 981 | op[0] = this->subexpressions[0]->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 982 | |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 983 | type = unary_arithmetic_result_type(op[0]->type, state, & loc); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 984 | |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 985 | error_emitted = type->is_error(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 986 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 987 | result = new(ctx) ir_expression(operations[this->oper], type, |
| 988 | op[0], NULL); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 989 | break; |
| 990 | |
| 991 | case ast_add: |
| 992 | case ast_sub: |
| 993 | case ast_mul: |
| 994 | case ast_div: |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 995 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 996 | op[1] = this->subexpressions[1]->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 997 | |
Ian Romanick | bfb09c2 | 2010-03-29 16:32:55 -0700 | [diff] [blame] | 998 | type = arithmetic_result_type(op[0], op[1], |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 999 | (this->oper == ast_mul), |
Eric Anholt | a13bb14 | 2010-03-31 16:38:11 -1000 | [diff] [blame] | 1000 | state, & loc); |
| 1001 | error_emitted = type->is_error(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1002 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1003 | result = new(ctx) ir_expression(operations[this->oper], type, |
| 1004 | op[0], op[1]); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1005 | break; |
| 1006 | |
| 1007 | case ast_mod: |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1008 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 1009 | op[1] = this->subexpressions[1]->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1010 | |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 1011 | type = modulus_result_type(op[0]->type, op[1]->type, state, & loc); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1012 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1013 | assert(operations[this->oper] == ir_binop_mod); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1014 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1015 | result = new(ctx) ir_expression(operations[this->oper], type, |
| 1016 | op[0], op[1]); |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 1017 | error_emitted = type->is_error(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1018 | break; |
| 1019 | |
| 1020 | case ast_lshift: |
| 1021 | case ast_rshift: |
Chad Versace | 5c4c36f | 2010-10-08 16:22:28 -0700 | [diff] [blame] | 1022 | if (state->language_version < 130) { |
| 1023 | _mesa_glsl_error(&loc, state, "operator %s requires GLSL 1.30", |
| 1024 | operator_string(this->oper)); |
| 1025 | error_emitted = true; |
Chad Versace | 5c4c36f | 2010-10-08 16:22:28 -0700 | [diff] [blame] | 1026 | } |
| 1027 | |
Chad Versace | 5c4c36f | 2010-10-08 16:22:28 -0700 | [diff] [blame] | 1028 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 1029 | op[1] = this->subexpressions[1]->hir(instructions, state); |
Chad Versace | c0197ab | 2010-10-15 09:49:46 -0700 | [diff] [blame] | 1030 | type = shift_result_type(op[0]->type, op[1]->type, this->oper, state, |
| 1031 | &loc); |
Chad Versace | 5c4c36f | 2010-10-08 16:22:28 -0700 | [diff] [blame] | 1032 | result = new(ctx) ir_expression(operations[this->oper], type, |
| 1033 | op[0], op[1]); |
| 1034 | error_emitted = op[0]->type->is_error() || op[1]->type->is_error(); |
| 1035 | break; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1036 | |
| 1037 | case ast_less: |
| 1038 | case ast_greater: |
| 1039 | case ast_lequal: |
| 1040 | case ast_gequal: |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1041 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 1042 | op[1] = this->subexpressions[1]->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1043 | |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 1044 | type = relational_result_type(op[0], op[1], state, & loc); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1045 | |
| 1046 | /* The relational operators must either generate an error or result |
| 1047 | * in a scalar boolean. See page 57 of the GLSL 1.50 spec. |
| 1048 | */ |
Ian Romanick | a43817a | 2010-03-26 14:27:23 -0700 | [diff] [blame] | 1049 | assert(type->is_error() |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1050 | || ((type->base_type == GLSL_TYPE_BOOL) |
Ian Romanick | cb36f8a | 2010-03-09 15:51:22 -0800 | [diff] [blame] | 1051 | && type->is_scalar())); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1052 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1053 | result = new(ctx) ir_expression(operations[this->oper], type, |
| 1054 | op[0], op[1]); |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 1055 | error_emitted = type->is_error(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1056 | break; |
| 1057 | |
| 1058 | case ast_nequal: |
| 1059 | case ast_equal: |
Ian Romanick | 6e659ca | 2010-03-29 15:11:05 -0700 | [diff] [blame] | 1060 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 1061 | op[1] = this->subexpressions[1]->hir(instructions, state); |
| 1062 | |
| 1063 | /* From page 58 (page 64 of the PDF) of the GLSL 1.50 spec: |
| 1064 | * |
| 1065 | * "The equality operators equal (==), and not equal (!=) |
| 1066 | * operate on all types. They result in a scalar Boolean. If |
| 1067 | * the operand types do not match, then there must be a |
| 1068 | * conversion from Section 4.1.10 "Implicit Conversions" |
| 1069 | * applied to one operand that can make them match, in which |
| 1070 | * case this conversion is done." |
| 1071 | */ |
Ian Romanick | bfb09c2 | 2010-03-29 16:32:55 -0700 | [diff] [blame] | 1072 | if ((!apply_implicit_conversion(op[0]->type, op[1], state) |
| 1073 | && !apply_implicit_conversion(op[1]->type, op[0], state)) |
Ian Romanick | 212b032 | 2010-03-29 16:22:38 -0700 | [diff] [blame] | 1074 | || (op[0]->type != op[1]->type)) { |
Ian Romanick | 6e659ca | 2010-03-29 15:11:05 -0700 | [diff] [blame] | 1075 | _mesa_glsl_error(& loc, state, "operands of `%s' must have the same " |
| 1076 | "type", (this->oper == ast_equal) ? "==" : "!="); |
| 1077 | error_emitted = true; |
Ian Romanick | a80cbd6 | 2010-03-30 17:04:48 -0700 | [diff] [blame] | 1078 | } else if ((state->language_version <= 110) |
| 1079 | && (op[0]->type->is_array() || op[1]->type->is_array())) { |
| 1080 | _mesa_glsl_error(& loc, state, "array comparisons forbidden in " |
| 1081 | "GLSL 1.10"); |
| 1082 | error_emitted = true; |
Ian Romanick | 6e659ca | 2010-03-29 15:11:05 -0700 | [diff] [blame] | 1083 | } |
| 1084 | |
Eric Anholt | 175829f | 2011-04-09 12:54:34 -1000 | [diff] [blame] | 1085 | if (error_emitted) { |
| 1086 | result = new(ctx) ir_constant(false); |
| 1087 | } else { |
| 1088 | result = do_comparison(ctx, operations[this->oper], op[0], op[1]); |
| 1089 | assert(result->type == glsl_type::bool_type); |
Eric Anholt | 175829f | 2011-04-09 12:54:34 -1000 | [diff] [blame] | 1090 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1091 | break; |
| 1092 | |
| 1093 | case ast_bit_and: |
| 1094 | case ast_bit_xor: |
| 1095 | case ast_bit_or: |
Kenneth Graunke | 1eea963 | 2010-08-31 10:56:24 -0700 | [diff] [blame] | 1096 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 1097 | op[1] = this->subexpressions[1]->hir(instructions, state); |
Chad Versace | cfdbf8b | 2010-10-15 11:28:05 -0700 | [diff] [blame] | 1098 | type = bit_logic_result_type(op[0]->type, op[1]->type, this->oper, |
| 1099 | state, &loc); |
Kenneth Graunke | 1eea963 | 2010-08-31 10:56:24 -0700 | [diff] [blame] | 1100 | result = new(ctx) ir_expression(operations[this->oper], type, |
| 1101 | op[0], op[1]); |
| 1102 | error_emitted = op[0]->type->is_error() || op[1]->type->is_error(); |
| 1103 | break; |
| 1104 | |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1105 | case ast_bit_not: |
Kenneth Graunke | 1eea963 | 2010-08-31 10:56:24 -0700 | [diff] [blame] | 1106 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 1107 | |
| 1108 | if (state->language_version < 130) { |
| 1109 | _mesa_glsl_error(&loc, state, "bit-wise operations require GLSL 1.30"); |
| 1110 | error_emitted = true; |
| 1111 | } |
| 1112 | |
| 1113 | if (!op[0]->type->is_integer()) { |
| 1114 | _mesa_glsl_error(&loc, state, "operand of `~' must be an integer"); |
| 1115 | error_emitted = true; |
| 1116 | } |
| 1117 | |
| 1118 | type = op[0]->type; |
| 1119 | result = new(ctx) ir_expression(ir_unop_bit_not, type, op[0], NULL); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1120 | break; |
| 1121 | |
Eric Anholt | 4950a68 | 2010-04-16 01:10:32 -0700 | [diff] [blame] | 1122 | case ast_logic_and: { |
Eric Anholt | 7ec0c97 | 2011-04-09 10:27:02 -1000 | [diff] [blame] | 1123 | exec_list rhs_instructions; |
Eric Anholt | 0182270 | 2011-04-09 15:59:20 -1000 | [diff] [blame] | 1124 | op[0] = get_scalar_boolean_operand(instructions, state, this, 0, |
| 1125 | "LHS", &error_emitted); |
Eric Anholt | 7ec0c97 | 2011-04-09 10:27:02 -1000 | [diff] [blame] | 1126 | op[1] = get_scalar_boolean_operand(&rhs_instructions, state, this, 1, |
| 1127 | "RHS", &error_emitted); |
Eric Anholt | b82c0c3 | 2010-03-31 09:11:39 -1000 | [diff] [blame] | 1128 | |
Eric Anholt | 44b694e | 2010-04-16 13:49:04 -0700 | [diff] [blame] | 1129 | ir_constant *op0_const = op[0]->constant_expression_value(); |
| 1130 | if (op0_const) { |
| 1131 | if (op0_const->value.b[0]) { |
Eric Anholt | 7ec0c97 | 2011-04-09 10:27:02 -1000 | [diff] [blame] | 1132 | instructions->append_list(&rhs_instructions); |
| 1133 | result = op[1]; |
Eric Anholt | 44b694e | 2010-04-16 13:49:04 -0700 | [diff] [blame] | 1134 | } else { |
| 1135 | result = op0_const; |
| 1136 | } |
| 1137 | type = glsl_type::bool_type; |
| 1138 | } else { |
Ian Romanick | 81d664f | 2010-07-12 15:18:55 -0700 | [diff] [blame] | 1139 | ir_variable *const tmp = new(ctx) ir_variable(glsl_type::bool_type, |
Ian Romanick | 7e2aa91 | 2010-07-19 17:12:42 -0700 | [diff] [blame] | 1140 | "and_tmp", |
| 1141 | ir_var_temporary); |
Ian Romanick | 81d664f | 2010-07-12 15:18:55 -0700 | [diff] [blame] | 1142 | instructions->push_tail(tmp); |
| 1143 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1144 | ir_if *const stmt = new(ctx) ir_if(op[0]); |
Eric Anholt | 44b694e | 2010-04-16 13:49:04 -0700 | [diff] [blame] | 1145 | instructions->push_tail(stmt); |
Eric Anholt | 4950a68 | 2010-04-16 01:10:32 -0700 | [diff] [blame] | 1146 | |
Eric Anholt | 7ec0c97 | 2011-04-09 10:27:02 -1000 | [diff] [blame] | 1147 | stmt->then_instructions.append_list(&rhs_instructions); |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1148 | ir_dereference *const then_deref = new(ctx) ir_dereference_variable(tmp); |
Eric Anholt | 44b694e | 2010-04-16 13:49:04 -0700 | [diff] [blame] | 1149 | ir_assignment *const then_assign = |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1150 | new(ctx) ir_assignment(then_deref, op[1], NULL); |
Eric Anholt | 44b694e | 2010-04-16 13:49:04 -0700 | [diff] [blame] | 1151 | stmt->then_instructions.push_tail(then_assign); |
| 1152 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1153 | ir_dereference *const else_deref = new(ctx) ir_dereference_variable(tmp); |
Eric Anholt | 44b694e | 2010-04-16 13:49:04 -0700 | [diff] [blame] | 1154 | ir_assignment *const else_assign = |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1155 | new(ctx) ir_assignment(else_deref, new(ctx) ir_constant(false), NULL); |
Eric Anholt | 44b694e | 2010-04-16 13:49:04 -0700 | [diff] [blame] | 1156 | stmt->else_instructions.push_tail(else_assign); |
| 1157 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1158 | result = new(ctx) ir_dereference_variable(tmp); |
Eric Anholt | 44b694e | 2010-04-16 13:49:04 -0700 | [diff] [blame] | 1159 | type = tmp->type; |
Eric Anholt | b82c0c3 | 2010-03-31 09:11:39 -1000 | [diff] [blame] | 1160 | } |
Eric Anholt | 4950a68 | 2010-04-16 01:10:32 -0700 | [diff] [blame] | 1161 | break; |
| 1162 | } |
| 1163 | |
| 1164 | case ast_logic_or: { |
Eric Anholt | 9e04b19 | 2011-04-09 10:27:02 -1000 | [diff] [blame] | 1165 | exec_list rhs_instructions; |
Eric Anholt | 0182270 | 2011-04-09 15:59:20 -1000 | [diff] [blame] | 1166 | op[0] = get_scalar_boolean_operand(instructions, state, this, 0, |
| 1167 | "LHS", &error_emitted); |
Eric Anholt | 9e04b19 | 2011-04-09 10:27:02 -1000 | [diff] [blame] | 1168 | op[1] = get_scalar_boolean_operand(&rhs_instructions, state, this, 1, |
| 1169 | "RHS", &error_emitted); |
Eric Anholt | 4950a68 | 2010-04-16 01:10:32 -0700 | [diff] [blame] | 1170 | |
Eric Anholt | 44b694e | 2010-04-16 13:49:04 -0700 | [diff] [blame] | 1171 | ir_constant *op0_const = op[0]->constant_expression_value(); |
| 1172 | if (op0_const) { |
| 1173 | if (op0_const->value.b[0]) { |
| 1174 | result = op0_const; |
| 1175 | } else { |
Eric Anholt | 9e04b19 | 2011-04-09 10:27:02 -1000 | [diff] [blame] | 1176 | result = op[1]; |
Eric Anholt | 44b694e | 2010-04-16 13:49:04 -0700 | [diff] [blame] | 1177 | } |
| 1178 | type = glsl_type::bool_type; |
| 1179 | } else { |
Kenneth Graunke | dfd30ca | 2010-07-08 12:40:52 -0700 | [diff] [blame] | 1180 | ir_variable *const tmp = new(ctx) ir_variable(glsl_type::bool_type, |
Ian Romanick | 7e2aa91 | 2010-07-19 17:12:42 -0700 | [diff] [blame] | 1181 | "or_tmp", |
| 1182 | ir_var_temporary); |
Ian Romanick | 0b9ae3b | 2010-07-12 14:22:05 -0700 | [diff] [blame] | 1183 | instructions->push_tail(tmp); |
Eric Anholt | 4950a68 | 2010-04-16 01:10:32 -0700 | [diff] [blame] | 1184 | |
Ian Romanick | 81d664f | 2010-07-12 15:18:55 -0700 | [diff] [blame] | 1185 | ir_if *const stmt = new(ctx) ir_if(op[0]); |
| 1186 | instructions->push_tail(stmt); |
| 1187 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1188 | ir_dereference *const then_deref = new(ctx) ir_dereference_variable(tmp); |
Eric Anholt | 44b694e | 2010-04-16 13:49:04 -0700 | [diff] [blame] | 1189 | ir_assignment *const then_assign = |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1190 | new(ctx) ir_assignment(then_deref, new(ctx) ir_constant(true), NULL); |
Eric Anholt | 44b694e | 2010-04-16 13:49:04 -0700 | [diff] [blame] | 1191 | stmt->then_instructions.push_tail(then_assign); |
| 1192 | |
Eric Anholt | 9e04b19 | 2011-04-09 10:27:02 -1000 | [diff] [blame] | 1193 | stmt->else_instructions.append_list(&rhs_instructions); |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1194 | ir_dereference *const else_deref = new(ctx) ir_dereference_variable(tmp); |
Eric Anholt | 44b694e | 2010-04-16 13:49:04 -0700 | [diff] [blame] | 1195 | ir_assignment *const else_assign = |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1196 | new(ctx) ir_assignment(else_deref, op[1], NULL); |
Eric Anholt | 44b694e | 2010-04-16 13:49:04 -0700 | [diff] [blame] | 1197 | stmt->else_instructions.push_tail(else_assign); |
| 1198 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1199 | result = new(ctx) ir_dereference_variable(tmp); |
Eric Anholt | 44b694e | 2010-04-16 13:49:04 -0700 | [diff] [blame] | 1200 | type = tmp->type; |
Eric Anholt | 4950a68 | 2010-04-16 01:10:32 -0700 | [diff] [blame] | 1201 | } |
Eric Anholt | 4950a68 | 2010-04-16 01:10:32 -0700 | [diff] [blame] | 1202 | break; |
| 1203 | } |
| 1204 | |
| 1205 | case ast_logic_xor: |
Eric Anholt | 756c262 | 2011-04-09 14:57:17 -1000 | [diff] [blame] | 1206 | /* From page 33 (page 39 of the PDF) of the GLSL 1.10 spec: |
| 1207 | * |
| 1208 | * "The logical binary operators and (&&), or ( | | ), and |
| 1209 | * exclusive or (^^). They operate only on two Boolean |
| 1210 | * expressions and result in a Boolean expression." |
| 1211 | */ |
| 1212 | op[0] = get_scalar_boolean_operand(instructions, state, this, 0, "LHS", |
| 1213 | &error_emitted); |
| 1214 | op[1] = get_scalar_boolean_operand(instructions, state, this, 1, "RHS", |
| 1215 | &error_emitted); |
Eric Anholt | 4950a68 | 2010-04-16 01:10:32 -0700 | [diff] [blame] | 1216 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1217 | result = new(ctx) ir_expression(operations[this->oper], glsl_type::bool_type, |
| 1218 | op[0], op[1]); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1219 | break; |
| 1220 | |
Eric Anholt | a5827fe | 2010-03-31 16:50:55 -1000 | [diff] [blame] | 1221 | case ast_logic_not: |
Eric Anholt | 0182270 | 2011-04-09 15:59:20 -1000 | [diff] [blame] | 1222 | op[0] = get_scalar_boolean_operand(instructions, state, this, 0, |
| 1223 | "operand", &error_emitted); |
Eric Anholt | a5827fe | 2010-03-31 16:50:55 -1000 | [diff] [blame] | 1224 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1225 | result = new(ctx) ir_expression(operations[this->oper], glsl_type::bool_type, |
| 1226 | op[0], NULL); |
Eric Anholt | a5827fe | 2010-03-31 16:50:55 -1000 | [diff] [blame] | 1227 | break; |
| 1228 | |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1229 | case ast_mul_assign: |
| 1230 | case ast_div_assign: |
| 1231 | case ast_add_assign: |
| 1232 | case ast_sub_assign: { |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1233 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 1234 | op[1] = this->subexpressions[1]->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1235 | |
Ian Romanick | bfb09c2 | 2010-03-29 16:32:55 -0700 | [diff] [blame] | 1236 | type = arithmetic_result_type(op[0], op[1], |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1237 | (this->oper == ast_mul_assign), |
Eric Anholt | a13bb14 | 2010-03-31 16:38:11 -1000 | [diff] [blame] | 1238 | state, & loc); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1239 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1240 | ir_rvalue *temp_rhs = new(ctx) ir_expression(operations[this->oper], type, |
| 1241 | op[0], op[1]); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1242 | |
Eric Anholt | 3e24ef6 | 2010-06-23 12:40:17 -0700 | [diff] [blame] | 1243 | result = do_assignment(instructions, state, |
Ian Romanick | 85caea2 | 2011-03-15 16:33:27 -0700 | [diff] [blame] | 1244 | op[0]->clone(ctx, NULL), temp_rhs, false, |
Eric Anholt | 10a6852 | 2010-03-26 11:53:37 -0700 | [diff] [blame] | 1245 | this->subexpressions[0]->get_location()); |
Eric Anholt | 10a6852 | 2010-03-26 11:53:37 -0700 | [diff] [blame] | 1246 | error_emitted = (op[0]->type->is_error()); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1247 | |
| 1248 | /* GLSL 1.10 does not allow array assignment. However, we don't have to |
| 1249 | * explicitly test for this because none of the binary expression |
| 1250 | * operators allow array operands either. |
| 1251 | */ |
| 1252 | |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1253 | break; |
| 1254 | } |
| 1255 | |
Eric Anholt | 48a0e64 | 2010-03-26 11:57:46 -0700 | [diff] [blame] | 1256 | case ast_mod_assign: { |
| 1257 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 1258 | op[1] = this->subexpressions[1]->hir(instructions, state); |
| 1259 | |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 1260 | type = modulus_result_type(op[0]->type, op[1]->type, state, & loc); |
Eric Anholt | 48a0e64 | 2010-03-26 11:57:46 -0700 | [diff] [blame] | 1261 | |
| 1262 | assert(operations[this->oper] == ir_binop_mod); |
| 1263 | |
Ian Romanick | 768b55a | 2010-08-13 16:46:43 -0700 | [diff] [blame] | 1264 | ir_rvalue *temp_rhs; |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1265 | temp_rhs = new(ctx) ir_expression(operations[this->oper], type, |
| 1266 | op[0], op[1]); |
Eric Anholt | 48a0e64 | 2010-03-26 11:57:46 -0700 | [diff] [blame] | 1267 | |
Eric Anholt | 3e24ef6 | 2010-06-23 12:40:17 -0700 | [diff] [blame] | 1268 | result = do_assignment(instructions, state, |
Ian Romanick | 85caea2 | 2011-03-15 16:33:27 -0700 | [diff] [blame] | 1269 | op[0]->clone(ctx, NULL), temp_rhs, false, |
Eric Anholt | 48a0e64 | 2010-03-26 11:57:46 -0700 | [diff] [blame] | 1270 | this->subexpressions[0]->get_location()); |
Eric Anholt | 65e1a7ac | 2010-03-31 16:45:20 -1000 | [diff] [blame] | 1271 | error_emitted = type->is_error(); |
Eric Anholt | 48a0e64 | 2010-03-26 11:57:46 -0700 | [diff] [blame] | 1272 | break; |
| 1273 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1274 | |
| 1275 | case ast_ls_assign: |
Chad Versace | 338ed6e | 2010-10-15 10:05:50 -0700 | [diff] [blame] | 1276 | case ast_rs_assign: { |
| 1277 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 1278 | op[1] = this->subexpressions[1]->hir(instructions, state); |
| 1279 | type = shift_result_type(op[0]->type, op[1]->type, this->oper, state, |
| 1280 | &loc); |
| 1281 | ir_rvalue *temp_rhs = new(ctx) ir_expression(operations[this->oper], |
| 1282 | type, op[0], op[1]); |
| 1283 | result = do_assignment(instructions, state, op[0]->clone(ctx, NULL), |
Ian Romanick | 85caea2 | 2011-03-15 16:33:27 -0700 | [diff] [blame] | 1284 | temp_rhs, false, |
Chad Versace | 338ed6e | 2010-10-15 10:05:50 -0700 | [diff] [blame] | 1285 | this->subexpressions[0]->get_location()); |
| 1286 | error_emitted = op[0]->type->is_error() || op[1]->type->is_error(); |
Ian Romanick | 251eb75 | 2010-03-29 14:15:05 -0700 | [diff] [blame] | 1287 | break; |
Chad Versace | 338ed6e | 2010-10-15 10:05:50 -0700 | [diff] [blame] | 1288 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1289 | |
| 1290 | case ast_and_assign: |
| 1291 | case ast_xor_assign: |
Chad Versace | d03ac0f | 2010-10-15 12:08:28 -0700 | [diff] [blame] | 1292 | case ast_or_assign: { |
| 1293 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 1294 | op[1] = this->subexpressions[1]->hir(instructions, state); |
| 1295 | type = bit_logic_result_type(op[0]->type, op[1]->type, this->oper, |
| 1296 | state, &loc); |
| 1297 | ir_rvalue *temp_rhs = new(ctx) ir_expression(operations[this->oper], |
| 1298 | type, op[0], op[1]); |
| 1299 | result = do_assignment(instructions, state, op[0]->clone(ctx, NULL), |
Ian Romanick | 85caea2 | 2011-03-15 16:33:27 -0700 | [diff] [blame] | 1300 | temp_rhs, false, |
Chad Versace | d03ac0f | 2010-10-15 12:08:28 -0700 | [diff] [blame] | 1301 | this->subexpressions[0]->get_location()); |
| 1302 | error_emitted = op[0]->type->is_error() || op[1]->type->is_error(); |
Ian Romanick | 251eb75 | 2010-03-29 14:15:05 -0700 | [diff] [blame] | 1303 | break; |
Chad Versace | d03ac0f | 2010-10-15 12:08:28 -0700 | [diff] [blame] | 1304 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1305 | |
Ian Romanick | 96f9cea | 2010-03-29 15:33:54 -0700 | [diff] [blame] | 1306 | case ast_conditional: { |
Ian Romanick | 96f9cea | 2010-03-29 15:33:54 -0700 | [diff] [blame] | 1307 | /* From page 59 (page 65 of the PDF) of the GLSL 1.50 spec: |
| 1308 | * |
| 1309 | * "The ternary selection operator (?:). It operates on three |
| 1310 | * expressions (exp1 ? exp2 : exp3). This operator evaluates the |
| 1311 | * first expression, which must result in a scalar Boolean." |
| 1312 | */ |
Eric Anholt | 0182270 | 2011-04-09 15:59:20 -1000 | [diff] [blame] | 1313 | op[0] = get_scalar_boolean_operand(instructions, state, this, 0, |
| 1314 | "condition", &error_emitted); |
Ian Romanick | 96f9cea | 2010-03-29 15:33:54 -0700 | [diff] [blame] | 1315 | |
| 1316 | /* The :? operator is implemented by generating an anonymous temporary |
| 1317 | * followed by an if-statement. The last instruction in each branch of |
| 1318 | * the if-statement assigns a value to the anonymous temporary. This |
| 1319 | * temporary is the r-value of the expression. |
| 1320 | */ |
Ian Romanick | 0ad76c6 | 2010-06-11 12:56:26 -0700 | [diff] [blame] | 1321 | exec_list then_instructions; |
| 1322 | exec_list else_instructions; |
Ian Romanick | 96f9cea | 2010-03-29 15:33:54 -0700 | [diff] [blame] | 1323 | |
Ian Romanick | 0ad76c6 | 2010-06-11 12:56:26 -0700 | [diff] [blame] | 1324 | op[1] = this->subexpressions[1]->hir(&then_instructions, state); |
| 1325 | op[2] = this->subexpressions[2]->hir(&else_instructions, state); |
Ian Romanick | 96f9cea | 2010-03-29 15:33:54 -0700 | [diff] [blame] | 1326 | |
| 1327 | /* From page 59 (page 65 of the PDF) of the GLSL 1.50 spec: |
| 1328 | * |
| 1329 | * "The second and third expressions can be any type, as |
| 1330 | * long their types match, or there is a conversion in |
| 1331 | * Section 4.1.10 "Implicit Conversions" that can be applied |
| 1332 | * to one of the expressions to make their types match. This |
| 1333 | * resulting matching type is the type of the entire |
| 1334 | * expression." |
| 1335 | */ |
Ian Romanick | bfb09c2 | 2010-03-29 16:32:55 -0700 | [diff] [blame] | 1336 | if ((!apply_implicit_conversion(op[1]->type, op[2], state) |
| 1337 | && !apply_implicit_conversion(op[2]->type, op[1], state)) |
Ian Romanick | db9be2e | 2010-03-29 16:25:56 -0700 | [diff] [blame] | 1338 | || (op[1]->type != op[2]->type)) { |
Ian Romanick | 96f9cea | 2010-03-29 15:33:54 -0700 | [diff] [blame] | 1339 | YYLTYPE loc = this->subexpressions[1]->get_location(); |
| 1340 | |
| 1341 | _mesa_glsl_error(& loc, state, "Second and third operands of ?: " |
| 1342 | "operator must have matching types."); |
| 1343 | error_emitted = true; |
Ian Romanick | 0ad76c6 | 2010-06-11 12:56:26 -0700 | [diff] [blame] | 1344 | type = glsl_type::error_type; |
Ian Romanick | db9be2e | 2010-03-29 16:25:56 -0700 | [diff] [blame] | 1345 | } else { |
Ian Romanick | 0ad76c6 | 2010-06-11 12:56:26 -0700 | [diff] [blame] | 1346 | type = op[1]->type; |
Ian Romanick | 96f9cea | 2010-03-29 15:33:54 -0700 | [diff] [blame] | 1347 | } |
| 1348 | |
Ian Romanick | f09fabc | 2010-09-07 14:30:06 -0700 | [diff] [blame] | 1349 | /* From page 33 (page 39 of the PDF) of the GLSL 1.10 spec: |
| 1350 | * |
| 1351 | * "The second and third expressions must be the same type, but can |
| 1352 | * be of any type other than an array." |
| 1353 | */ |
| 1354 | if ((state->language_version <= 110) && type->is_array()) { |
| 1355 | _mesa_glsl_error(& loc, state, "Second and third operands of ?: " |
| 1356 | "operator must not be arrays."); |
| 1357 | error_emitted = true; |
| 1358 | } |
| 1359 | |
Ian Romanick | 7825d3d | 2010-06-11 13:45:51 -0700 | [diff] [blame] | 1360 | ir_constant *cond_val = op[0]->constant_expression_value(); |
| 1361 | ir_constant *then_val = op[1]->constant_expression_value(); |
| 1362 | ir_constant *else_val = op[2]->constant_expression_value(); |
Ian Romanick | 0ad76c6 | 2010-06-11 12:56:26 -0700 | [diff] [blame] | 1363 | |
Ian Romanick | 7825d3d | 2010-06-11 13:45:51 -0700 | [diff] [blame] | 1364 | if (then_instructions.is_empty() |
| 1365 | && else_instructions.is_empty() |
| 1366 | && (cond_val != NULL) && (then_val != NULL) && (else_val != NULL)) { |
| 1367 | result = (cond_val->value.b[0]) ? then_val : else_val; |
| 1368 | } else { |
Ian Romanick | 7e2aa91 | 2010-07-19 17:12:42 -0700 | [diff] [blame] | 1369 | ir_variable *const tmp = |
| 1370 | new(ctx) ir_variable(type, "conditional_tmp", ir_var_temporary); |
Ian Romanick | 0b9ae3b | 2010-07-12 14:22:05 -0700 | [diff] [blame] | 1371 | instructions->push_tail(tmp); |
Ian Romanick | 0ad76c6 | 2010-06-11 12:56:26 -0700 | [diff] [blame] | 1372 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1373 | ir_if *const stmt = new(ctx) ir_if(op[0]); |
Ian Romanick | 7825d3d | 2010-06-11 13:45:51 -0700 | [diff] [blame] | 1374 | instructions->push_tail(stmt); |
Ian Romanick | 0ad76c6 | 2010-06-11 12:56:26 -0700 | [diff] [blame] | 1375 | |
Ian Romanick | 7825d3d | 2010-06-11 13:45:51 -0700 | [diff] [blame] | 1376 | then_instructions.move_nodes_to(& stmt->then_instructions); |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1377 | ir_dereference *const then_deref = |
| 1378 | new(ctx) ir_dereference_variable(tmp); |
Ian Romanick | 7825d3d | 2010-06-11 13:45:51 -0700 | [diff] [blame] | 1379 | ir_assignment *const then_assign = |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1380 | new(ctx) ir_assignment(then_deref, op[1], NULL); |
Ian Romanick | 7825d3d | 2010-06-11 13:45:51 -0700 | [diff] [blame] | 1381 | stmt->then_instructions.push_tail(then_assign); |
Ian Romanick | 0ad76c6 | 2010-06-11 12:56:26 -0700 | [diff] [blame] | 1382 | |
Ian Romanick | 7825d3d | 2010-06-11 13:45:51 -0700 | [diff] [blame] | 1383 | else_instructions.move_nodes_to(& stmt->else_instructions); |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1384 | ir_dereference *const else_deref = |
| 1385 | new(ctx) ir_dereference_variable(tmp); |
Ian Romanick | 7825d3d | 2010-06-11 13:45:51 -0700 | [diff] [blame] | 1386 | ir_assignment *const else_assign = |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1387 | new(ctx) ir_assignment(else_deref, op[2], NULL); |
Ian Romanick | 7825d3d | 2010-06-11 13:45:51 -0700 | [diff] [blame] | 1388 | stmt->else_instructions.push_tail(else_assign); |
| 1389 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1390 | result = new(ctx) ir_dereference_variable(tmp); |
Ian Romanick | 7825d3d | 2010-06-11 13:45:51 -0700 | [diff] [blame] | 1391 | } |
Ian Romanick | 251eb75 | 2010-03-29 14:15:05 -0700 | [diff] [blame] | 1392 | break; |
Ian Romanick | 96f9cea | 2010-03-29 15:33:54 -0700 | [diff] [blame] | 1393 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1394 | |
| 1395 | case ast_pre_inc: |
Eric Anholt | 76ea56c | 2010-03-26 12:16:54 -0700 | [diff] [blame] | 1396 | case ast_pre_dec: { |
| 1397 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 1398 | if (op[0]->type->base_type == GLSL_TYPE_FLOAT) |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1399 | op[1] = new(ctx) ir_constant(1.0f); |
Eric Anholt | 76ea56c | 2010-03-26 12:16:54 -0700 | [diff] [blame] | 1400 | else |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1401 | op[1] = new(ctx) ir_constant(1); |
Eric Anholt | 76ea56c | 2010-03-26 12:16:54 -0700 | [diff] [blame] | 1402 | |
Eric Anholt | a13bb14 | 2010-03-31 16:38:11 -1000 | [diff] [blame] | 1403 | type = arithmetic_result_type(op[0], op[1], false, state, & loc); |
Eric Anholt | 76ea56c | 2010-03-26 12:16:54 -0700 | [diff] [blame] | 1404 | |
Ian Romanick | 768b55a | 2010-08-13 16:46:43 -0700 | [diff] [blame] | 1405 | ir_rvalue *temp_rhs; |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1406 | temp_rhs = new(ctx) ir_expression(operations[this->oper], type, |
| 1407 | op[0], op[1]); |
Eric Anholt | 76ea56c | 2010-03-26 12:16:54 -0700 | [diff] [blame] | 1408 | |
Eric Anholt | 3e24ef6 | 2010-06-23 12:40:17 -0700 | [diff] [blame] | 1409 | result = do_assignment(instructions, state, |
Ian Romanick | 85caea2 | 2011-03-15 16:33:27 -0700 | [diff] [blame] | 1410 | op[0]->clone(ctx, NULL), temp_rhs, false, |
Eric Anholt | 76ea56c | 2010-03-26 12:16:54 -0700 | [diff] [blame] | 1411 | this->subexpressions[0]->get_location()); |
Eric Anholt | 76ea56c | 2010-03-26 12:16:54 -0700 | [diff] [blame] | 1412 | error_emitted = op[0]->type->is_error(); |
| 1413 | break; |
| 1414 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1415 | |
| 1416 | case ast_post_inc: |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 1417 | case ast_post_dec: { |
| 1418 | op[0] = this->subexpressions[0]->hir(instructions, state); |
| 1419 | if (op[0]->type->base_type == GLSL_TYPE_FLOAT) |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1420 | op[1] = new(ctx) ir_constant(1.0f); |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 1421 | else |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1422 | op[1] = new(ctx) ir_constant(1); |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 1423 | |
| 1424 | error_emitted = op[0]->type->is_error() || op[1]->type->is_error(); |
| 1425 | |
Eric Anholt | a13bb14 | 2010-03-31 16:38:11 -1000 | [diff] [blame] | 1426 | type = arithmetic_result_type(op[0], op[1], false, state, & loc); |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 1427 | |
Ian Romanick | 768b55a | 2010-08-13 16:46:43 -0700 | [diff] [blame] | 1428 | ir_rvalue *temp_rhs; |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1429 | temp_rhs = new(ctx) ir_expression(operations[this->oper], type, |
| 1430 | op[0], op[1]); |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 1431 | |
| 1432 | /* Get a temporary of a copy of the lvalue before it's modified. |
| 1433 | * This may get thrown away later. |
| 1434 | */ |
Eric Anholt | 8273bd4 | 2010-08-04 12:34:56 -0700 | [diff] [blame] | 1435 | result = get_lvalue_copy(instructions, op[0]->clone(ctx, NULL)); |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 1436 | |
Eric Anholt | 3e24ef6 | 2010-06-23 12:40:17 -0700 | [diff] [blame] | 1437 | (void)do_assignment(instructions, state, |
Ian Romanick | 85caea2 | 2011-03-15 16:33:27 -0700 | [diff] [blame] | 1438 | op[0]->clone(ctx, NULL), temp_rhs, false, |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 1439 | this->subexpressions[0]->get_location()); |
| 1440 | |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 1441 | error_emitted = op[0]->type->is_error(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1442 | break; |
Eric Anholt | de38f0e | 2010-03-26 12:14:54 -0700 | [diff] [blame] | 1443 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1444 | |
| 1445 | case ast_field_selection: |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1446 | result = _mesa_ast_field_selection_to_hir(this, instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1447 | break; |
| 1448 | |
Ian Romanick | 27e3cf8 | 2010-04-01 18:03:59 -0700 | [diff] [blame] | 1449 | case ast_array_index: { |
| 1450 | YYLTYPE index_loc = subexpressions[1]->get_location(); |
| 1451 | |
| 1452 | op[0] = subexpressions[0]->hir(instructions, state); |
| 1453 | op[1] = subexpressions[1]->hir(instructions, state); |
| 1454 | |
| 1455 | error_emitted = op[0]->type->is_error() || op[1]->type->is_error(); |
| 1456 | |
Ian Romanick | a9159f9 | 2010-05-26 15:08:11 -0700 | [diff] [blame] | 1457 | ir_rvalue *const array = op[0]; |
Ian Romanick | b8a21cc | 2010-04-01 18:31:11 -0700 | [diff] [blame] | 1458 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1459 | result = new(ctx) ir_dereference_array(op[0], op[1]); |
Ian Romanick | b8a21cc | 2010-04-01 18:31:11 -0700 | [diff] [blame] | 1460 | |
| 1461 | /* Do not use op[0] after this point. Use array. |
| 1462 | */ |
| 1463 | op[0] = NULL; |
| 1464 | |
Ian Romanick | 27e3cf8 | 2010-04-01 18:03:59 -0700 | [diff] [blame] | 1465 | |
| 1466 | if (error_emitted) |
| 1467 | break; |
| 1468 | |
Ian Romanick | 63038e1 | 2010-04-05 13:16:00 -0700 | [diff] [blame] | 1469 | if (!array->type->is_array() |
| 1470 | && !array->type->is_matrix() |
| 1471 | && !array->type->is_vector()) { |
Ian Romanick | 27e3cf8 | 2010-04-01 18:03:59 -0700 | [diff] [blame] | 1472 | _mesa_glsl_error(& index_loc, state, |
Ian Romanick | 63038e1 | 2010-04-05 13:16:00 -0700 | [diff] [blame] | 1473 | "cannot dereference non-array / non-matrix / " |
| 1474 | "non-vector"); |
Ian Romanick | 27e3cf8 | 2010-04-01 18:03:59 -0700 | [diff] [blame] | 1475 | error_emitted = true; |
| 1476 | } |
| 1477 | |
| 1478 | if (!op[1]->type->is_integer()) { |
| 1479 | _mesa_glsl_error(& index_loc, state, |
| 1480 | "array index must be integer type"); |
| 1481 | error_emitted = true; |
| 1482 | } else if (!op[1]->type->is_scalar()) { |
| 1483 | _mesa_glsl_error(& index_loc, state, |
| 1484 | "array index must be scalar"); |
| 1485 | error_emitted = true; |
| 1486 | } |
| 1487 | |
| 1488 | /* If the array index is a constant expression and the array has a |
| 1489 | * declared size, ensure that the access is in-bounds. If the array |
| 1490 | * index is not a constant expression, ensure that the array has a |
| 1491 | * declared size. |
| 1492 | */ |
| 1493 | ir_constant *const const_index = op[1]->constant_expression_value(); |
| 1494 | if (const_index != NULL) { |
| 1495 | const int idx = const_index->value.i[0]; |
Ian Romanick | 63038e1 | 2010-04-05 13:16:00 -0700 | [diff] [blame] | 1496 | const char *type_name; |
| 1497 | unsigned bound = 0; |
| 1498 | |
| 1499 | if (array->type->is_matrix()) { |
| 1500 | type_name = "matrix"; |
| 1501 | } else if (array->type->is_vector()) { |
| 1502 | type_name = "vector"; |
| 1503 | } else { |
| 1504 | type_name = "array"; |
| 1505 | } |
Ian Romanick | 27e3cf8 | 2010-04-01 18:03:59 -0700 | [diff] [blame] | 1506 | |
| 1507 | /* From page 24 (page 30 of the PDF) of the GLSL 1.50 spec: |
| 1508 | * |
| 1509 | * "It is illegal to declare an array with a size, and then |
| 1510 | * later (in the same shader) index the same array with an |
| 1511 | * integral constant expression greater than or equal to the |
| 1512 | * declared size. It is also illegal to index an array with a |
| 1513 | * negative constant expression." |
| 1514 | */ |
Ian Romanick | 63038e1 | 2010-04-05 13:16:00 -0700 | [diff] [blame] | 1515 | if (array->type->is_matrix()) { |
| 1516 | if (array->type->row_type()->vector_elements <= idx) { |
| 1517 | bound = array->type->row_type()->vector_elements; |
| 1518 | } |
| 1519 | } else if (array->type->is_vector()) { |
| 1520 | if (array->type->vector_elements <= idx) { |
| 1521 | bound = array->type->vector_elements; |
| 1522 | } |
| 1523 | } else { |
| 1524 | if ((array->type->array_size() > 0) |
| 1525 | && (array->type->array_size() <= idx)) { |
| 1526 | bound = array->type->array_size(); |
| 1527 | } |
| 1528 | } |
| 1529 | |
| 1530 | if (bound > 0) { |
| 1531 | _mesa_glsl_error(& loc, state, "%s index must be < %u", |
| 1532 | type_name, bound); |
| 1533 | error_emitted = true; |
| 1534 | } else if (idx < 0) { |
| 1535 | _mesa_glsl_error(& loc, state, "%s index must be >= 0", |
| 1536 | type_name); |
Ian Romanick | 27e3cf8 | 2010-04-01 18:03:59 -0700 | [diff] [blame] | 1537 | error_emitted = true; |
| 1538 | } |
| 1539 | |
Ian Romanick | 63038e1 | 2010-04-05 13:16:00 -0700 | [diff] [blame] | 1540 | if (array->type->is_array()) { |
Ian Romanick | a9159f9 | 2010-05-26 15:08:11 -0700 | [diff] [blame] | 1541 | /* If the array is a variable dereference, it dereferences the |
| 1542 | * whole array, by definition. Use this to get the variable. |
| 1543 | * |
| 1544 | * FINISHME: Should some methods for getting / setting / testing |
| 1545 | * FINISHME: array access limits be added to ir_dereference? |
| 1546 | */ |
| 1547 | ir_variable *const v = array->whole_variable_referenced(); |
Ian Romanick | 63038e1 | 2010-04-05 13:16:00 -0700 | [diff] [blame] | 1548 | if ((v != NULL) && (unsigned(idx) > v->max_array_access)) |
| 1549 | v->max_array_access = idx; |
Ian Romanick | 27e3cf8 | 2010-04-01 18:03:59 -0700 | [diff] [blame] | 1550 | } |
Kenneth Graunke | 2b7c42b | 2010-07-16 18:28:44 -0700 | [diff] [blame] | 1551 | } else if (array->type->array_size() == 0) { |
| 1552 | _mesa_glsl_error(&loc, state, "unsized array index must be constant"); |
Eric Anholt | a721abf | 2010-08-23 10:32:01 -0700 | [diff] [blame] | 1553 | } else { |
| 1554 | if (array->type->is_array()) { |
Aras Pranckevicius | 5226f8c | 2010-08-25 22:42:13 +0300 | [diff] [blame] | 1555 | /* whole_variable_referenced can return NULL if the array is a |
| 1556 | * member of a structure. In this case it is safe to not update |
| 1557 | * the max_array_access field because it is never used for fields |
| 1558 | * of structures. |
| 1559 | */ |
Eric Anholt | a721abf | 2010-08-23 10:32:01 -0700 | [diff] [blame] | 1560 | ir_variable *v = array->whole_variable_referenced(); |
Aras Pranckevicius | 5226f8c | 2010-08-25 22:42:13 +0300 | [diff] [blame] | 1561 | if (v != NULL) |
Ian Romanick | 0d9d036 | 2011-03-24 16:50:23 -0700 | [diff] [blame] | 1562 | v->max_array_access = array->type->array_size() - 1; |
Eric Anholt | a721abf | 2010-08-23 10:32:01 -0700 | [diff] [blame] | 1563 | } |
Ian Romanick | 27e3cf8 | 2010-04-01 18:03:59 -0700 | [diff] [blame] | 1564 | } |
| 1565 | |
Ian Romanick | e942f32 | 2011-01-04 16:09:00 -0800 | [diff] [blame] | 1566 | /* From page 23 (29 of the PDF) of the GLSL 1.30 spec: |
| 1567 | * |
Chad Versace | f0f2ec4 | 2010-12-07 10:35:36 -0800 | [diff] [blame] | 1568 | * "Samplers aggregated into arrays within a shader (using square |
| 1569 | * brackets [ ]) can only be indexed with integral constant |
| 1570 | * expressions [...]." |
Ian Romanick | e942f32 | 2011-01-04 16:09:00 -0800 | [diff] [blame] | 1571 | * |
| 1572 | * This restriction was added in GLSL 1.30. Shaders using earlier version |
| 1573 | * of the language should not be rejected by the compiler front-end for |
| 1574 | * using this construct. This allows useful things such as using a loop |
| 1575 | * counter as the index to an array of samplers. If the loop in unrolled, |
| 1576 | * the code should compile correctly. Instead, emit a warning. |
Chad Versace | f0f2ec4 | 2010-12-07 10:35:36 -0800 | [diff] [blame] | 1577 | */ |
| 1578 | if (array->type->is_array() && |
| 1579 | array->type->element_type()->is_sampler() && |
| 1580 | const_index == NULL) { |
| 1581 | |
Ian Romanick | e942f32 | 2011-01-04 16:09:00 -0800 | [diff] [blame] | 1582 | if (state->language_version == 100) { |
| 1583 | _mesa_glsl_warning(&loc, state, |
| 1584 | "sampler arrays indexed with non-constant " |
| 1585 | "expressions is optional in GLSL ES 1.00"); |
| 1586 | } else if (state->language_version < 130) { |
| 1587 | _mesa_glsl_warning(&loc, state, |
| 1588 | "sampler arrays indexed with non-constant " |
| 1589 | "expressions is forbidden in GLSL 1.30 and " |
| 1590 | "later"); |
| 1591 | } else { |
| 1592 | _mesa_glsl_error(&loc, state, |
| 1593 | "sampler arrays indexed with non-constant " |
| 1594 | "expressions is forbidden in GLSL 1.30 and " |
| 1595 | "later"); |
| 1596 | error_emitted = true; |
| 1597 | } |
Chad Versace | f0f2ec4 | 2010-12-07 10:35:36 -0800 | [diff] [blame] | 1598 | } |
| 1599 | |
Ian Romanick | 27e3cf8 | 2010-04-01 18:03:59 -0700 | [diff] [blame] | 1600 | if (error_emitted) |
| 1601 | result->type = glsl_type::error_type; |
| 1602 | |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1603 | break; |
Ian Romanick | 27e3cf8 | 2010-04-01 18:03:59 -0700 | [diff] [blame] | 1604 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1605 | |
| 1606 | case ast_function_call: |
Ian Romanick | 7cfddf1 | 2010-03-10 13:26:52 -0800 | [diff] [blame] | 1607 | /* Should *NEVER* get here. ast_function_call should always be handled |
| 1608 | * by ast_function_expression::hir. |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1609 | */ |
Ian Romanick | 7cfddf1 | 2010-03-10 13:26:52 -0800 | [diff] [blame] | 1610 | assert(0); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1611 | break; |
| 1612 | |
| 1613 | case ast_identifier: { |
| 1614 | /* ast_identifier can appear several places in a full abstract syntax |
| 1615 | * tree. This particular use must be at location specified in the grammar |
| 1616 | * as 'variable_identifier'. |
| 1617 | */ |
Ian Romanick | 8bde4ce | 2010-03-19 11:57:24 -0700 | [diff] [blame] | 1618 | ir_variable *var = |
| 1619 | state->symbols->get_variable(this->primary_expression.identifier); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1620 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1621 | result = new(ctx) ir_dereference_variable(var); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1622 | |
| 1623 | if (var != NULL) { |
Ian Romanick | bd33055 | 2011-01-07 18:34:58 -0800 | [diff] [blame] | 1624 | var->used = true; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1625 | } else { |
Ian Romanick | 71d0bbf | 2010-03-23 13:21:19 -0700 | [diff] [blame] | 1626 | _mesa_glsl_error(& loc, state, "`%s' undeclared", |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1627 | this->primary_expression.identifier); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1628 | |
| 1629 | error_emitted = true; |
| 1630 | } |
| 1631 | break; |
| 1632 | } |
| 1633 | |
| 1634 | case ast_int_constant: |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1635 | result = new(ctx) ir_constant(this->primary_expression.int_constant); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1636 | break; |
| 1637 | |
| 1638 | case ast_uint_constant: |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1639 | result = new(ctx) ir_constant(this->primary_expression.uint_constant); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1640 | break; |
| 1641 | |
| 1642 | case ast_float_constant: |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1643 | result = new(ctx) ir_constant(this->primary_expression.float_constant); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1644 | break; |
| 1645 | |
| 1646 | case ast_bool_constant: |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 1647 | result = new(ctx) ir_constant(bool(this->primary_expression.bool_constant)); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1648 | break; |
| 1649 | |
| 1650 | case ast_sequence: { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1651 | /* It should not be possible to generate a sequence in the AST without |
| 1652 | * any expressions in it. |
| 1653 | */ |
Ian Romanick | 304ea90 | 2010-05-10 11:17:53 -0700 | [diff] [blame] | 1654 | assert(!this->expressions.is_empty()); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1655 | |
| 1656 | /* The r-value of a sequence is the last expression in the sequence. If |
| 1657 | * the other expressions in the sequence do not have side-effects (and |
| 1658 | * therefore add instructions to the instruction list), they get dropped |
| 1659 | * on the floor. |
| 1660 | */ |
Ian Romanick | 3d5cfcf | 2011-04-11 10:10:30 -0700 | [diff] [blame] | 1661 | exec_node *previous_tail_pred = NULL; |
| 1662 | YYLTYPE previous_operand_loc = loc; |
| 1663 | |
| 1664 | foreach_list_typed (ast_node, ast, link, &this->expressions) { |
| 1665 | /* If one of the operands of comma operator does not generate any |
| 1666 | * code, we want to emit a warning. At each pass through the loop |
| 1667 | * previous_tail_pred will point to the last instruction in the |
| 1668 | * stream *before* processing the previous operand. Naturally, |
| 1669 | * instructions->tail_pred will point to the last instruction in the |
| 1670 | * stream *after* processing the previous operand. If the two |
| 1671 | * pointers match, then the previous operand had no effect. |
| 1672 | * |
| 1673 | * The warning behavior here differs slightly from GCC. GCC will |
| 1674 | * only emit a warning if none of the left-hand operands have an |
| 1675 | * effect. However, it will emit a warning for each. I believe that |
| 1676 | * there are some cases in C (especially with GCC extensions) where |
| 1677 | * it is useful to have an intermediate step in a sequence have no |
| 1678 | * effect, but I don't think these cases exist in GLSL. Either way, |
| 1679 | * it would be a giant hassle to replicate that behavior. |
| 1680 | */ |
| 1681 | if (previous_tail_pred == instructions->tail_pred) { |
| 1682 | _mesa_glsl_warning(&previous_operand_loc, state, |
| 1683 | "left-hand operand of comma expression has " |
| 1684 | "no effect"); |
| 1685 | } |
| 1686 | |
| 1687 | /* tail_pred is directly accessed instead of using the get_tail() |
| 1688 | * method for performance reasons. get_tail() has extra code to |
| 1689 | * return NULL when the list is empty. We don't care about that |
| 1690 | * here, so using tail_pred directly is fine. |
| 1691 | */ |
| 1692 | previous_tail_pred = instructions->tail_pred; |
| 1693 | previous_operand_loc = ast->get_location(); |
| 1694 | |
Ian Romanick | 304ea90 | 2010-05-10 11:17:53 -0700 | [diff] [blame] | 1695 | result = ast->hir(instructions, state); |
Ian Romanick | 3d5cfcf | 2011-04-11 10:10:30 -0700 | [diff] [blame] | 1696 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1697 | |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1698 | /* Any errors should have already been emitted in the loop above. |
| 1699 | */ |
| 1700 | error_emitted = true; |
| 1701 | break; |
| 1702 | } |
| 1703 | } |
Kenneth Graunke | 08ba977 | 2011-04-14 17:21:59 -0700 | [diff] [blame] | 1704 | type = NULL; /* use result->type, not type. */ |
| 1705 | assert(result != NULL); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1706 | |
Kenneth Graunke | 08ba977 | 2011-04-14 17:21:59 -0700 | [diff] [blame] | 1707 | if (result->type->is_error() && !error_emitted) |
Ian Romanick | 71d0bbf | 2010-03-23 13:21:19 -0700 | [diff] [blame] | 1708 | _mesa_glsl_error(& loc, state, "type mismatch"); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1709 | |
| 1710 | return result; |
| 1711 | } |
| 1712 | |
| 1713 | |
Kenneth Graunke | fb9fb5f | 2010-03-26 00:25:36 -0700 | [diff] [blame] | 1714 | ir_rvalue * |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 1715 | ast_expression_statement::hir(exec_list *instructions, |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1716 | struct _mesa_glsl_parse_state *state) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1717 | { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1718 | /* It is possible to have expression statements that don't have an |
| 1719 | * expression. This is the solitary semicolon: |
| 1720 | * |
| 1721 | * for (i = 0; i < 5; i++) |
| 1722 | * ; |
| 1723 | * |
| 1724 | * In this case the expression will be NULL. Test for NULL and don't do |
| 1725 | * anything in that case. |
| 1726 | */ |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1727 | if (expression != NULL) |
| 1728 | expression->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1729 | |
| 1730 | /* Statements do not have r-values. |
| 1731 | */ |
| 1732 | return NULL; |
| 1733 | } |
| 1734 | |
| 1735 | |
Kenneth Graunke | fb9fb5f | 2010-03-26 00:25:36 -0700 | [diff] [blame] | 1736 | ir_rvalue * |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 1737 | ast_compound_statement::hir(exec_list *instructions, |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1738 | struct _mesa_glsl_parse_state *state) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1739 | { |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1740 | if (new_scope) |
Ian Romanick | 8bde4ce | 2010-03-19 11:57:24 -0700 | [diff] [blame] | 1741 | state->symbols->push_scope(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1742 | |
Ian Romanick | 2b97dc6 | 2010-05-10 17:42:05 -0700 | [diff] [blame] | 1743 | foreach_list_typed (ast_node, ast, link, &this->statements) |
Ian Romanick | 304ea90 | 2010-05-10 11:17:53 -0700 | [diff] [blame] | 1744 | ast->hir(instructions, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1745 | |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 1746 | if (new_scope) |
Ian Romanick | 8bde4ce | 2010-03-19 11:57:24 -0700 | [diff] [blame] | 1747 | state->symbols->pop_scope(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1748 | |
| 1749 | /* Compound statements do not have r-values. |
| 1750 | */ |
| 1751 | return NULL; |
| 1752 | } |
| 1753 | |
| 1754 | |
Ian Romanick | 28009cd | 2010-03-30 16:59:27 -0700 | [diff] [blame] | 1755 | static const glsl_type * |
Kenneth Graunke | d8e34e2 | 2010-08-07 02:56:01 -0700 | [diff] [blame] | 1756 | process_array_type(YYLTYPE *loc, const glsl_type *base, ast_node *array_size, |
Ian Romanick | 28009cd | 2010-03-30 16:59:27 -0700 | [diff] [blame] | 1757 | struct _mesa_glsl_parse_state *state) |
| 1758 | { |
| 1759 | unsigned length = 0; |
| 1760 | |
| 1761 | /* FINISHME: Reject delcarations of multidimensional arrays. */ |
| 1762 | |
| 1763 | if (array_size != NULL) { |
| 1764 | exec_list dummy_instructions; |
| 1765 | ir_rvalue *const ir = array_size->hir(& dummy_instructions, state); |
| 1766 | YYLTYPE loc = array_size->get_location(); |
| 1767 | |
| 1768 | /* FINISHME: Verify that the grammar forbids side-effects in array |
| 1769 | * FINISHME: sizes. i.e., 'vec4 [x = 12] data' |
| 1770 | */ |
| 1771 | assert(dummy_instructions.is_empty()); |
| 1772 | |
| 1773 | if (ir != NULL) { |
| 1774 | if (!ir->type->is_integer()) { |
| 1775 | _mesa_glsl_error(& loc, state, "array size must be integer type"); |
| 1776 | } else if (!ir->type->is_scalar()) { |
| 1777 | _mesa_glsl_error(& loc, state, "array size must be scalar type"); |
| 1778 | } else { |
| 1779 | ir_constant *const size = ir->constant_expression_value(); |
| 1780 | |
| 1781 | if (size == NULL) { |
| 1782 | _mesa_glsl_error(& loc, state, "array size must be a " |
| 1783 | "constant valued expression"); |
| 1784 | } else if (size->value.i[0] <= 0) { |
| 1785 | _mesa_glsl_error(& loc, state, "array size must be > 0"); |
| 1786 | } else { |
| 1787 | assert(size->type == ir->type); |
| 1788 | length = size->value.u[0]; |
| 1789 | } |
| 1790 | } |
| 1791 | } |
Kenneth Graunke | d8e34e2 | 2010-08-07 02:56:01 -0700 | [diff] [blame] | 1792 | } else if (state->es_shader) { |
| 1793 | /* Section 10.17 of the GLSL ES 1.00 specification states that unsized |
| 1794 | * array declarations have been removed from the language. |
| 1795 | */ |
| 1796 | _mesa_glsl_error(loc, state, "unsized array declarations are not " |
| 1797 | "allowed in GLSL ES 1.00."); |
Ian Romanick | 28009cd | 2010-03-30 16:59:27 -0700 | [diff] [blame] | 1798 | } |
| 1799 | |
Ian Romanick | f38d15b | 2010-07-20 15:33:40 -0700 | [diff] [blame] | 1800 | return glsl_type::get_array_instance(base, length); |
Ian Romanick | 28009cd | 2010-03-30 16:59:27 -0700 | [diff] [blame] | 1801 | } |
| 1802 | |
| 1803 | |
Ian Romanick | d612a12 | 2010-03-31 16:22:06 -0700 | [diff] [blame] | 1804 | const glsl_type * |
| 1805 | ast_type_specifier::glsl_type(const char **name, |
| 1806 | struct _mesa_glsl_parse_state *state) const |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1807 | { |
Ian Romanick | d612a12 | 2010-03-31 16:22:06 -0700 | [diff] [blame] | 1808 | const struct glsl_type *type; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1809 | |
Kenneth Graunke | ca92ae2 | 2010-09-18 11:11:09 +0200 | [diff] [blame] | 1810 | type = state->symbols->get_type(this->type_name); |
| 1811 | *name = this->type_name; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1812 | |
Kenneth Graunke | ca92ae2 | 2010-09-18 11:11:09 +0200 | [diff] [blame] | 1813 | if (this->is_array) { |
| 1814 | YYLTYPE loc = this->get_location(); |
| 1815 | type = process_array_type(&loc, type, this->array_size, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1816 | } |
| 1817 | |
| 1818 | return type; |
| 1819 | } |
| 1820 | |
| 1821 | |
| 1822 | static void |
| 1823 | apply_type_qualifier_to_variable(const struct ast_type_qualifier *qual, |
Ian Romanick | 768b55a | 2010-08-13 16:46:43 -0700 | [diff] [blame] | 1824 | ir_variable *var, |
Eric Anholt | 2e063f1 | 2010-03-28 00:56:22 -0700 | [diff] [blame] | 1825 | struct _mesa_glsl_parse_state *state, |
| 1826 | YYLTYPE *loc) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1827 | { |
Ian Romanick | bd33055 | 2011-01-07 18:34:58 -0800 | [diff] [blame] | 1828 | if (qual->flags.q.invariant) { |
| 1829 | if (var->used) { |
| 1830 | _mesa_glsl_error(loc, state, |
| 1831 | "variable `%s' may not be redeclared " |
| 1832 | "`invariant' after being used", |
| 1833 | var->name); |
| 1834 | } else { |
| 1835 | var->invariant = 1; |
| 1836 | } |
| 1837 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1838 | |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 1839 | if (qual->flags.q.constant || qual->flags.q.attribute |
| 1840 | || qual->flags.q.uniform |
| 1841 | || (qual->flags.q.varying && (state->target == fragment_shader))) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1842 | var->read_only = 1; |
| 1843 | |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 1844 | if (qual->flags.q.centroid) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1845 | var->centroid = 1; |
| 1846 | |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 1847 | if (qual->flags.q.attribute && state->target != vertex_shader) { |
Eric Anholt | 2e063f1 | 2010-03-28 00:56:22 -0700 | [diff] [blame] | 1848 | var->type = glsl_type::error_type; |
| 1849 | _mesa_glsl_error(loc, state, |
| 1850 | "`attribute' variables may not be declared in the " |
Ian Romanick | ae4c4c0 | 2010-04-07 16:41:40 -0700 | [diff] [blame] | 1851 | "%s shader", |
| 1852 | _mesa_glsl_shader_target_name(state->target)); |
Eric Anholt | 2e063f1 | 2010-03-28 00:56:22 -0700 | [diff] [blame] | 1853 | } |
| 1854 | |
Eric Anholt | 90b7825 | 2010-03-31 21:21:20 -1000 | [diff] [blame] | 1855 | /* From page 25 (page 31 of the PDF) of the GLSL 1.10 spec: |
| 1856 | * |
| 1857 | * "The varying qualifier can be used only with the data types |
| 1858 | * float, vec2, vec3, vec4, mat2, mat3, and mat4, or arrays of |
| 1859 | * these." |
| 1860 | */ |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 1861 | if (qual->flags.q.varying) { |
Eric Anholt | 0ca1719 | 2010-05-19 13:38:15 -0700 | [diff] [blame] | 1862 | const glsl_type *non_array_type; |
| 1863 | |
| 1864 | if (var->type && var->type->is_array()) |
| 1865 | non_array_type = var->type->fields.array; |
| 1866 | else |
| 1867 | non_array_type = var->type; |
| 1868 | |
| 1869 | if (non_array_type && non_array_type->base_type != GLSL_TYPE_FLOAT) { |
| 1870 | var->type = glsl_type::error_type; |
| 1871 | _mesa_glsl_error(loc, state, |
| 1872 | "varying variables must be of base type float"); |
| 1873 | } |
Eric Anholt | 90b7825 | 2010-03-31 21:21:20 -1000 | [diff] [blame] | 1874 | } |
| 1875 | |
Ian Romanick | 7e2aa91 | 2010-07-19 17:12:42 -0700 | [diff] [blame] | 1876 | /* If there is no qualifier that changes the mode of the variable, leave |
| 1877 | * the setting alone. |
| 1878 | */ |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 1879 | if (qual->flags.q.in && qual->flags.q.out) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1880 | var->mode = ir_var_inout; |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 1881 | else if (qual->flags.q.attribute || qual->flags.q.in |
| 1882 | || (qual->flags.q.varying && (state->target == fragment_shader))) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1883 | var->mode = ir_var_in; |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 1884 | else if (qual->flags.q.out |
| 1885 | || (qual->flags.q.varying && (state->target == vertex_shader))) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1886 | var->mode = ir_var_out; |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 1887 | else if (qual->flags.q.uniform) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1888 | var->mode = ir_var_uniform; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1889 | |
Ian Romanick | 86b4398 | 2011-01-06 10:49:56 -0800 | [diff] [blame] | 1890 | if (state->all_invariant && (state->current_function == NULL)) { |
| 1891 | switch (state->target) { |
| 1892 | case vertex_shader: |
| 1893 | if (var->mode == ir_var_out) |
| 1894 | var->invariant = true; |
| 1895 | break; |
| 1896 | case geometry_shader: |
| 1897 | if ((var->mode == ir_var_in) || (var->mode == ir_var_out)) |
| 1898 | var->invariant = true; |
| 1899 | break; |
| 1900 | case fragment_shader: |
| 1901 | if (var->mode == ir_var_in) |
| 1902 | var->invariant = true; |
| 1903 | break; |
| 1904 | } |
| 1905 | } |
| 1906 | |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 1907 | if (qual->flags.q.flat) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1908 | var->interpolation = ir_var_flat; |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 1909 | else if (qual->flags.q.noperspective) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 1910 | var->interpolation = ir_var_noperspective; |
| 1911 | else |
| 1912 | var->interpolation = ir_var_smooth; |
Ian Romanick | 9d97537 | 2010-04-02 17:17:47 -0700 | [diff] [blame] | 1913 | |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 1914 | var->pixel_center_integer = qual->flags.q.pixel_center_integer; |
| 1915 | var->origin_upper_left = qual->flags.q.origin_upper_left; |
| 1916 | if ((qual->flags.q.origin_upper_left || qual->flags.q.pixel_center_integer) |
Ian Romanick | 8d8469e | 2010-06-30 17:48:09 -0700 | [diff] [blame] | 1917 | && (strcmp(var->name, "gl_FragCoord") != 0)) { |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 1918 | const char *const qual_string = (qual->flags.q.origin_upper_left) |
Ian Romanick | 8d8469e | 2010-06-30 17:48:09 -0700 | [diff] [blame] | 1919 | ? "origin_upper_left" : "pixel_center_integer"; |
| 1920 | |
| 1921 | _mesa_glsl_error(loc, state, |
| 1922 | "layout qualifier `%s' can only be applied to " |
| 1923 | "fragment shader input `gl_FragCoord'", |
| 1924 | qual_string); |
| 1925 | } |
| 1926 | |
Ian Romanick | eee68d3 | 2010-10-07 15:13:38 -0700 | [diff] [blame] | 1927 | if (qual->flags.q.explicit_location) { |
| 1928 | const bool global_scope = (state->current_function == NULL); |
| 1929 | bool fail = false; |
| 1930 | const char *string = ""; |
| 1931 | |
| 1932 | /* In the vertex shader only shader inputs can be given explicit |
| 1933 | * locations. |
| 1934 | * |
| 1935 | * In the fragment shader only shader outputs can be given explicit |
| 1936 | * locations. |
| 1937 | */ |
| 1938 | switch (state->target) { |
| 1939 | case vertex_shader: |
| 1940 | if (!global_scope || (var->mode != ir_var_in)) { |
| 1941 | fail = true; |
| 1942 | string = "input"; |
| 1943 | } |
| 1944 | break; |
| 1945 | |
| 1946 | case geometry_shader: |
| 1947 | _mesa_glsl_error(loc, state, |
| 1948 | "geometry shader variables cannot be given " |
| 1949 | "explicit locations\n"); |
| 1950 | break; |
| 1951 | |
| 1952 | case fragment_shader: |
Paul Berry | b078aad | 2011-06-28 09:42:24 -0700 | [diff] [blame] | 1953 | if (!global_scope || (var->mode != ir_var_out)) { |
Ian Romanick | eee68d3 | 2010-10-07 15:13:38 -0700 | [diff] [blame] | 1954 | fail = true; |
| 1955 | string = "output"; |
| 1956 | } |
| 1957 | break; |
Kenneth Graunke | a75da2c | 2010-10-20 14:59:40 -0700 | [diff] [blame] | 1958 | }; |
Ian Romanick | eee68d3 | 2010-10-07 15:13:38 -0700 | [diff] [blame] | 1959 | |
| 1960 | if (fail) { |
| 1961 | _mesa_glsl_error(loc, state, |
| 1962 | "only %s shader %s variables can be given an " |
| 1963 | "explicit location\n", |
| 1964 | _mesa_glsl_shader_target_name(state->target), |
| 1965 | string); |
| 1966 | } else { |
| 1967 | var->explicit_location = true; |
Ian Romanick | 68a4fc9 | 2010-10-07 17:21:22 -0700 | [diff] [blame] | 1968 | |
| 1969 | /* This bit of silliness is needed because invalid explicit locations |
| 1970 | * are supposed to be flagged during linking. Small negative values |
| 1971 | * biased by VERT_ATTRIB_GENERIC0 or FRAG_RESULT_DATA0 could alias |
| 1972 | * built-in values (e.g., -16+VERT_ATTRIB_GENERIC0 = VERT_ATTRIB_POS). |
| 1973 | * The linker needs to be able to differentiate these cases. This |
| 1974 | * ensures that negative values stay negative. |
| 1975 | */ |
| 1976 | if (qual->location >= 0) { |
| 1977 | var->location = (state->target == vertex_shader) |
| 1978 | ? (qual->location + VERT_ATTRIB_GENERIC0) |
| 1979 | : (qual->location + FRAG_RESULT_DATA0); |
| 1980 | } else { |
| 1981 | var->location = qual->location; |
| 1982 | } |
Ian Romanick | eee68d3 | 2010-10-07 15:13:38 -0700 | [diff] [blame] | 1983 | } |
| 1984 | } |
| 1985 | |
Ian Romanick | 4bcff0c | 2011-01-07 16:53:59 -0800 | [diff] [blame] | 1986 | /* Does the declaration use the 'layout' keyword? |
| 1987 | */ |
| 1988 | const bool uses_layout = qual->flags.q.pixel_center_integer |
| 1989 | || qual->flags.q.origin_upper_left |
| 1990 | || qual->flags.q.explicit_location; |
| 1991 | |
| 1992 | /* Does the declaration use the deprecated 'attribute' or 'varying' |
| 1993 | * keywords? |
| 1994 | */ |
| 1995 | const bool uses_deprecated_qualifier = qual->flags.q.attribute |
| 1996 | || qual->flags.q.varying; |
| 1997 | |
| 1998 | /* Is the 'layout' keyword used with parameters that allow relaxed checking. |
| 1999 | * Many implementations of GL_ARB_fragment_coord_conventions_enable and some |
| 2000 | * implementations (only Mesa?) GL_ARB_explicit_attrib_location_enable |
| 2001 | * allowed the layout qualifier to be used with 'varying' and 'attribute'. |
| 2002 | * These extensions and all following extensions that add the 'layout' |
| 2003 | * keyword have been modified to require the use of 'in' or 'out'. |
| 2004 | * |
| 2005 | * The following extension do not allow the deprecated keywords: |
| 2006 | * |
| 2007 | * GL_AMD_conservative_depth |
| 2008 | * GL_ARB_gpu_shader5 |
| 2009 | * GL_ARB_separate_shader_objects |
| 2010 | * GL_ARB_tesselation_shader |
| 2011 | * GL_ARB_transform_feedback3 |
| 2012 | * GL_ARB_uniform_buffer_object |
| 2013 | * |
| 2014 | * It is unknown whether GL_EXT_shader_image_load_store or GL_NV_gpu_shader5 |
| 2015 | * allow layout with the deprecated keywords. |
| 2016 | */ |
| 2017 | const bool relaxed_layout_qualifier_checking = |
| 2018 | state->ARB_fragment_coord_conventions_enable; |
| 2019 | |
| 2020 | if (uses_layout && uses_deprecated_qualifier) { |
| 2021 | if (relaxed_layout_qualifier_checking) { |
| 2022 | _mesa_glsl_warning(loc, state, |
| 2023 | "`layout' qualifier may not be used with " |
| 2024 | "`attribute' or `varying'"); |
| 2025 | } else { |
| 2026 | _mesa_glsl_error(loc, state, |
| 2027 | "`layout' qualifier may not be used with " |
| 2028 | "`attribute' or `varying'"); |
| 2029 | } |
| 2030 | } |
| 2031 | |
Chad Versace | bc04d24 | 2011-01-27 01:40:26 -0800 | [diff] [blame] | 2032 | /* Layout qualifiers for gl_FragDepth, which are enabled by extension |
| 2033 | * AMD_conservative_depth. |
| 2034 | */ |
| 2035 | int depth_layout_count = qual->flags.q.depth_any |
| 2036 | + qual->flags.q.depth_greater |
| 2037 | + qual->flags.q.depth_less |
| 2038 | + qual->flags.q.depth_unchanged; |
| 2039 | if (depth_layout_count > 0 |
| 2040 | && !state->AMD_conservative_depth_enable) { |
| 2041 | _mesa_glsl_error(loc, state, |
| 2042 | "extension GL_AMD_conservative_depth must be enabled " |
| 2043 | "to use depth layout qualifiers"); |
| 2044 | } else if (depth_layout_count > 0 |
| 2045 | && strcmp(var->name, "gl_FragDepth") != 0) { |
| 2046 | _mesa_glsl_error(loc, state, |
| 2047 | "depth layout qualifiers can be applied only to " |
| 2048 | "gl_FragDepth"); |
| 2049 | } else if (depth_layout_count > 1 |
| 2050 | && strcmp(var->name, "gl_FragDepth") == 0) { |
| 2051 | _mesa_glsl_error(loc, state, |
| 2052 | "at most one depth layout qualifier can be applied to " |
| 2053 | "gl_FragDepth"); |
| 2054 | } |
| 2055 | if (qual->flags.q.depth_any) |
| 2056 | var->depth_layout = ir_depth_layout_any; |
| 2057 | else if (qual->flags.q.depth_greater) |
| 2058 | var->depth_layout = ir_depth_layout_greater; |
| 2059 | else if (qual->flags.q.depth_less) |
| 2060 | var->depth_layout = ir_depth_layout_less; |
| 2061 | else if (qual->flags.q.depth_unchanged) |
| 2062 | var->depth_layout = ir_depth_layout_unchanged; |
| 2063 | else |
| 2064 | var->depth_layout = ir_depth_layout_none; |
| 2065 | |
Kenneth Graunke | 10eaa8b | 2010-09-07 02:59:38 -0700 | [diff] [blame] | 2066 | if (var->type->is_array() && state->language_version != 110) { |
Ian Romanick | 9d97537 | 2010-04-02 17:17:47 -0700 | [diff] [blame] | 2067 | var->array_lvalue = true; |
| 2068 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2069 | } |
| 2070 | |
Ian Romanick | 8e6cb9f | 2011-03-04 15:28:40 -0800 | [diff] [blame] | 2071 | /** |
| 2072 | * Get the variable that is being redeclared by this declaration |
| 2073 | * |
| 2074 | * Semantic checks to verify the validity of the redeclaration are also |
| 2075 | * performed. If semantic checks fail, compilation error will be emitted via |
| 2076 | * \c _mesa_glsl_error, but a non-\c NULL pointer will still be returned. |
| 2077 | * |
| 2078 | * \returns |
| 2079 | * A pointer to an existing variable in the current scope if the declaration |
| 2080 | * is a redeclaration, \c NULL otherwise. |
| 2081 | */ |
| 2082 | ir_variable * |
| 2083 | get_variable_being_redeclared(ir_variable *var, ast_declaration *decl, |
| 2084 | struct _mesa_glsl_parse_state *state) |
| 2085 | { |
| 2086 | /* Check if this declaration is actually a re-declaration, either to |
| 2087 | * resize an array or add qualifiers to an existing variable. |
| 2088 | * |
| 2089 | * This is allowed for variables in the current scope, or when at |
| 2090 | * global scope (for built-ins in the implicit outer scope). |
| 2091 | */ |
| 2092 | ir_variable *earlier = state->symbols->get_variable(decl->identifier); |
| 2093 | if (earlier == NULL || |
| 2094 | (state->current_function != NULL && |
| 2095 | !state->symbols->name_declared_this_scope(decl->identifier))) { |
| 2096 | return NULL; |
| 2097 | } |
| 2098 | |
| 2099 | |
| 2100 | YYLTYPE loc = decl->get_location(); |
| 2101 | |
| 2102 | /* From page 24 (page 30 of the PDF) of the GLSL 1.50 spec, |
| 2103 | * |
| 2104 | * "It is legal to declare an array without a size and then |
| 2105 | * later re-declare the same name as an array of the same |
| 2106 | * type and specify a size." |
| 2107 | */ |
| 2108 | if ((earlier->type->array_size() == 0) |
| 2109 | && var->type->is_array() |
| 2110 | && (var->type->element_type() == earlier->type->element_type())) { |
| 2111 | /* FINISHME: This doesn't match the qualifiers on the two |
| 2112 | * FINISHME: declarations. It's not 100% clear whether this is |
| 2113 | * FINISHME: required or not. |
| 2114 | */ |
| 2115 | |
| 2116 | /* From page 54 (page 60 of the PDF) of the GLSL 1.20 spec: |
| 2117 | * |
| 2118 | * "The size [of gl_TexCoord] can be at most |
| 2119 | * gl_MaxTextureCoords." |
| 2120 | */ |
| 2121 | const unsigned size = unsigned(var->type->array_size()); |
| 2122 | if ((strcmp("gl_TexCoord", var->name) == 0) |
| 2123 | && (size > state->Const.MaxTextureCoords)) { |
| 2124 | _mesa_glsl_error(& loc, state, "`gl_TexCoord' array size cannot " |
| 2125 | "be larger than gl_MaxTextureCoords (%u)\n", |
| 2126 | state->Const.MaxTextureCoords); |
| 2127 | } else if ((size > 0) && (size <= earlier->max_array_access)) { |
| 2128 | _mesa_glsl_error(& loc, state, "array size must be > %u due to " |
| 2129 | "previous access", |
| 2130 | earlier->max_array_access); |
| 2131 | } |
| 2132 | |
| 2133 | earlier->type = var->type; |
| 2134 | delete var; |
| 2135 | var = NULL; |
| 2136 | } else if (state->ARB_fragment_coord_conventions_enable |
| 2137 | && strcmp(var->name, "gl_FragCoord") == 0 |
| 2138 | && earlier->type == var->type |
| 2139 | && earlier->mode == var->mode) { |
| 2140 | /* Allow redeclaration of gl_FragCoord for ARB_fcc layout |
| 2141 | * qualifiers. |
| 2142 | */ |
| 2143 | earlier->origin_upper_left = var->origin_upper_left; |
| 2144 | earlier->pixel_center_integer = var->pixel_center_integer; |
| 2145 | |
| 2146 | /* According to section 4.3.7 of the GLSL 1.30 spec, |
| 2147 | * the following built-in varaibles can be redeclared with an |
| 2148 | * interpolation qualifier: |
| 2149 | * * gl_FrontColor |
| 2150 | * * gl_BackColor |
| 2151 | * * gl_FrontSecondaryColor |
| 2152 | * * gl_BackSecondaryColor |
| 2153 | * * gl_Color |
| 2154 | * * gl_SecondaryColor |
| 2155 | */ |
| 2156 | } else if (state->language_version >= 130 |
| 2157 | && (strcmp(var->name, "gl_FrontColor") == 0 |
| 2158 | || strcmp(var->name, "gl_BackColor") == 0 |
| 2159 | || strcmp(var->name, "gl_FrontSecondaryColor") == 0 |
| 2160 | || strcmp(var->name, "gl_BackSecondaryColor") == 0 |
| 2161 | || strcmp(var->name, "gl_Color") == 0 |
| 2162 | || strcmp(var->name, "gl_SecondaryColor") == 0) |
| 2163 | && earlier->type == var->type |
| 2164 | && earlier->mode == var->mode) { |
| 2165 | earlier->interpolation = var->interpolation; |
| 2166 | |
| 2167 | /* Layout qualifiers for gl_FragDepth. */ |
| 2168 | } else if (state->AMD_conservative_depth_enable |
| 2169 | && strcmp(var->name, "gl_FragDepth") == 0 |
| 2170 | && earlier->type == var->type |
| 2171 | && earlier->mode == var->mode) { |
| 2172 | |
| 2173 | /** From the AMD_conservative_depth spec: |
| 2174 | * Within any shader, the first redeclarations of gl_FragDepth |
| 2175 | * must appear before any use of gl_FragDepth. |
| 2176 | */ |
| 2177 | if (earlier->used) { |
| 2178 | _mesa_glsl_error(&loc, state, |
| 2179 | "the first redeclaration of gl_FragDepth " |
| 2180 | "must appear before any use of gl_FragDepth"); |
| 2181 | } |
| 2182 | |
| 2183 | /* Prevent inconsistent redeclaration of depth layout qualifier. */ |
| 2184 | if (earlier->depth_layout != ir_depth_layout_none |
| 2185 | && earlier->depth_layout != var->depth_layout) { |
| 2186 | _mesa_glsl_error(&loc, state, |
| 2187 | "gl_FragDepth: depth layout is declared here " |
| 2188 | "as '%s, but it was previously declared as " |
| 2189 | "'%s'", |
| 2190 | depth_layout_string(var->depth_layout), |
| 2191 | depth_layout_string(earlier->depth_layout)); |
| 2192 | } |
| 2193 | |
| 2194 | earlier->depth_layout = var->depth_layout; |
| 2195 | |
| 2196 | } else { |
| 2197 | _mesa_glsl_error(&loc, state, "`%s' redeclared", decl->identifier); |
| 2198 | } |
| 2199 | |
| 2200 | return earlier; |
| 2201 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2202 | |
Ian Romanick | 0292ffb | 2011-03-04 15:29:33 -0800 | [diff] [blame] | 2203 | /** |
| 2204 | * Generate the IR for an initializer in a variable declaration |
| 2205 | */ |
| 2206 | ir_rvalue * |
| 2207 | process_initializer(ir_variable *var, ast_declaration *decl, |
| 2208 | ast_fully_specified_type *type, |
| 2209 | exec_list *initializer_instructions, |
| 2210 | struct _mesa_glsl_parse_state *state) |
| 2211 | { |
| 2212 | ir_rvalue *result = NULL; |
| 2213 | |
| 2214 | YYLTYPE initializer_loc = decl->initializer->get_location(); |
| 2215 | |
| 2216 | /* From page 24 (page 30 of the PDF) of the GLSL 1.10 spec: |
| 2217 | * |
| 2218 | * "All uniform variables are read-only and are initialized either |
| 2219 | * directly by an application via API commands, or indirectly by |
| 2220 | * OpenGL." |
| 2221 | */ |
| 2222 | if ((state->language_version <= 110) |
| 2223 | && (var->mode == ir_var_uniform)) { |
| 2224 | _mesa_glsl_error(& initializer_loc, state, |
| 2225 | "cannot initialize uniforms in GLSL 1.10"); |
| 2226 | } |
| 2227 | |
| 2228 | if (var->type->is_sampler()) { |
| 2229 | _mesa_glsl_error(& initializer_loc, state, |
| 2230 | "cannot initialize samplers"); |
| 2231 | } |
| 2232 | |
| 2233 | if ((var->mode == ir_var_in) && (state->current_function == NULL)) { |
| 2234 | _mesa_glsl_error(& initializer_loc, state, |
| 2235 | "cannot initialize %s shader input / %s", |
| 2236 | _mesa_glsl_shader_target_name(state->target), |
| 2237 | (state->target == vertex_shader) |
| 2238 | ? "attribute" : "varying"); |
| 2239 | } |
| 2240 | |
| 2241 | ir_dereference *const lhs = new(state) ir_dereference_variable(var); |
| 2242 | ir_rvalue *rhs = decl->initializer->hir(initializer_instructions, |
| 2243 | state); |
| 2244 | |
| 2245 | /* Calculate the constant value if this is a const or uniform |
| 2246 | * declaration. |
| 2247 | */ |
| 2248 | if (type->qualifier.flags.q.constant |
| 2249 | || type->qualifier.flags.q.uniform) { |
Ian Romanick | 85caea2 | 2011-03-15 16:33:27 -0700 | [diff] [blame] | 2250 | ir_rvalue *new_rhs = validate_assignment(state, var->type, rhs, true); |
Ian Romanick | 0292ffb | 2011-03-04 15:29:33 -0800 | [diff] [blame] | 2251 | if (new_rhs != NULL) { |
| 2252 | rhs = new_rhs; |
| 2253 | |
| 2254 | ir_constant *constant_value = rhs->constant_expression_value(); |
| 2255 | if (!constant_value) { |
| 2256 | _mesa_glsl_error(& initializer_loc, state, |
| 2257 | "initializer of %s variable `%s' must be a " |
| 2258 | "constant expression", |
| 2259 | (type->qualifier.flags.q.constant) |
| 2260 | ? "const" : "uniform", |
| 2261 | decl->identifier); |
| 2262 | if (var->type->is_numeric()) { |
| 2263 | /* Reduce cascading errors. */ |
| 2264 | var->constant_value = ir_constant::zero(state, var->type); |
| 2265 | } |
| 2266 | } else { |
| 2267 | rhs = constant_value; |
| 2268 | var->constant_value = constant_value; |
| 2269 | } |
| 2270 | } else { |
| 2271 | _mesa_glsl_error(&initializer_loc, state, |
| 2272 | "initializer of type %s cannot be assigned to " |
| 2273 | "variable of type %s", |
| 2274 | rhs->type->name, var->type->name); |
| 2275 | if (var->type->is_numeric()) { |
| 2276 | /* Reduce cascading errors. */ |
| 2277 | var->constant_value = ir_constant::zero(state, var->type); |
| 2278 | } |
| 2279 | } |
| 2280 | } |
| 2281 | |
| 2282 | if (rhs && !rhs->type->is_error()) { |
| 2283 | bool temp = var->read_only; |
| 2284 | if (type->qualifier.flags.q.constant) |
| 2285 | var->read_only = false; |
| 2286 | |
| 2287 | /* Never emit code to initialize a uniform. |
| 2288 | */ |
| 2289 | const glsl_type *initializer_type; |
| 2290 | if (!type->qualifier.flags.q.uniform) { |
| 2291 | result = do_assignment(initializer_instructions, state, |
Ian Romanick | 85caea2 | 2011-03-15 16:33:27 -0700 | [diff] [blame] | 2292 | lhs, rhs, true, |
Ian Romanick | 0292ffb | 2011-03-04 15:29:33 -0800 | [diff] [blame] | 2293 | type->get_location()); |
| 2294 | initializer_type = result->type; |
| 2295 | } else |
| 2296 | initializer_type = rhs->type; |
| 2297 | |
| 2298 | /* If the declared variable is an unsized array, it must inherrit |
| 2299 | * its full type from the initializer. A declaration such as |
| 2300 | * |
| 2301 | * uniform float a[] = float[](1.0, 2.0, 3.0, 3.0); |
| 2302 | * |
| 2303 | * becomes |
| 2304 | * |
| 2305 | * uniform float a[4] = float[](1.0, 2.0, 3.0, 3.0); |
| 2306 | * |
| 2307 | * The assignment generated in the if-statement (below) will also |
| 2308 | * automatically handle this case for non-uniforms. |
| 2309 | * |
| 2310 | * If the declared variable is not an array, the types must |
| 2311 | * already match exactly. As a result, the type assignment |
| 2312 | * here can be done unconditionally. For non-uniforms the call |
| 2313 | * to do_assignment can change the type of the initializer (via |
| 2314 | * the implicit conversion rules). For uniforms the initializer |
| 2315 | * must be a constant expression, and the type of that expression |
| 2316 | * was validated above. |
| 2317 | */ |
| 2318 | var->type = initializer_type; |
| 2319 | |
| 2320 | var->read_only = temp; |
| 2321 | } |
| 2322 | |
| 2323 | return result; |
| 2324 | } |
| 2325 | |
Kenneth Graunke | fb9fb5f | 2010-03-26 00:25:36 -0700 | [diff] [blame] | 2326 | ir_rvalue * |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 2327 | ast_declarator_list::hir(exec_list *instructions, |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 2328 | struct _mesa_glsl_parse_state *state) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2329 | { |
Kenneth Graunke | 953ff12 | 2010-06-25 13:14:37 -0700 | [diff] [blame] | 2330 | void *ctx = state; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2331 | const struct glsl_type *decl_type; |
| 2332 | const char *type_name = NULL; |
Eric Anholt | 8558459 | 2010-04-14 15:38:52 -0700 | [diff] [blame] | 2333 | ir_rvalue *result = NULL; |
Ian Romanick | c824e35 | 2010-04-23 15:55:19 -0700 | [diff] [blame] | 2334 | YYLTYPE loc = this->get_location(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2335 | |
Ian Romanick | 6f0823d | 2010-07-01 20:39:08 -0700 | [diff] [blame] | 2336 | /* From page 46 (page 52 of the PDF) of the GLSL 1.50 spec: |
| 2337 | * |
| 2338 | * "To ensure that a particular output variable is invariant, it is |
| 2339 | * necessary to use the invariant qualifier. It can either be used to |
| 2340 | * qualify a previously declared variable as being invariant |
| 2341 | * |
| 2342 | * invariant gl_Position; // make existing gl_Position be invariant" |
| 2343 | * |
| 2344 | * In these cases the parser will set the 'invariant' flag in the declarator |
| 2345 | * list, and the type will be NULL. |
| 2346 | */ |
| 2347 | if (this->invariant) { |
| 2348 | assert(this->type == NULL); |
| 2349 | |
| 2350 | if (state->current_function != NULL) { |
| 2351 | _mesa_glsl_error(& loc, state, |
| 2352 | "All uses of `invariant' keyword must be at global " |
| 2353 | "scope\n"); |
| 2354 | } |
| 2355 | |
| 2356 | foreach_list_typed (ast_declaration, decl, link, &this->declarations) { |
| 2357 | assert(!decl->is_array); |
| 2358 | assert(decl->array_size == NULL); |
| 2359 | assert(decl->initializer == NULL); |
| 2360 | |
| 2361 | ir_variable *const earlier = |
| 2362 | state->symbols->get_variable(decl->identifier); |
| 2363 | if (earlier == NULL) { |
| 2364 | _mesa_glsl_error(& loc, state, |
| 2365 | "Undeclared variable `%s' cannot be marked " |
| 2366 | "invariant\n", decl->identifier); |
| 2367 | } else if ((state->target == vertex_shader) |
| 2368 | && (earlier->mode != ir_var_out)) { |
| 2369 | _mesa_glsl_error(& loc, state, |
| 2370 | "`%s' cannot be marked invariant, vertex shader " |
| 2371 | "outputs only\n", decl->identifier); |
| 2372 | } else if ((state->target == fragment_shader) |
| 2373 | && (earlier->mode != ir_var_in)) { |
| 2374 | _mesa_glsl_error(& loc, state, |
| 2375 | "`%s' cannot be marked invariant, fragment shader " |
| 2376 | "inputs only\n", decl->identifier); |
Ian Romanick | bd33055 | 2011-01-07 18:34:58 -0800 | [diff] [blame] | 2377 | } else if (earlier->used) { |
| 2378 | _mesa_glsl_error(& loc, state, |
| 2379 | "variable `%s' may not be redeclared " |
| 2380 | "`invariant' after being used", |
| 2381 | earlier->name); |
Ian Romanick | 6f0823d | 2010-07-01 20:39:08 -0700 | [diff] [blame] | 2382 | } else { |
| 2383 | earlier->invariant = true; |
| 2384 | } |
| 2385 | } |
| 2386 | |
| 2387 | /* Invariant redeclarations do not have r-values. |
| 2388 | */ |
| 2389 | return NULL; |
| 2390 | } |
| 2391 | |
| 2392 | assert(this->type != NULL); |
| 2393 | assert(!this->invariant); |
| 2394 | |
Ian Romanick | 3455ce6 | 2010-04-19 15:13:15 -0700 | [diff] [blame] | 2395 | /* The type specifier may contain a structure definition. Process that |
| 2396 | * before any of the variable declarations. |
| 2397 | */ |
| 2398 | (void) this->type->specifier->hir(instructions, state); |
| 2399 | |
Ian Romanick | d612a12 | 2010-03-31 16:22:06 -0700 | [diff] [blame] | 2400 | decl_type = this->type->specifier->glsl_type(& type_name, state); |
Ian Romanick | 304ea90 | 2010-05-10 11:17:53 -0700 | [diff] [blame] | 2401 | if (this->declarations.is_empty()) { |
Ian Romanick | 6f0823d | 2010-07-01 20:39:08 -0700 | [diff] [blame] | 2402 | /* The only valid case where the declaration list can be empty is when |
| 2403 | * the declaration is setting the default precision of a built-in type |
| 2404 | * (e.g., 'precision highp vec4;'). |
Ian Romanick | c824e35 | 2010-04-23 15:55:19 -0700 | [diff] [blame] | 2405 | */ |
| 2406 | |
Ian Romanick | 6f0823d | 2010-07-01 20:39:08 -0700 | [diff] [blame] | 2407 | if (decl_type != NULL) { |
Ian Romanick | c824e35 | 2010-04-23 15:55:19 -0700 | [diff] [blame] | 2408 | } else { |
| 2409 | _mesa_glsl_error(& loc, state, "incomplete declaration"); |
| 2410 | } |
| 2411 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2412 | |
Ian Romanick | 2b97dc6 | 2010-05-10 17:42:05 -0700 | [diff] [blame] | 2413 | foreach_list_typed (ast_declaration, decl, link, &this->declarations) { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2414 | const struct glsl_type *var_type; |
Ian Romanick | 768b55a | 2010-08-13 16:46:43 -0700 | [diff] [blame] | 2415 | ir_variable *var; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2416 | |
| 2417 | /* FINISHME: Emit a warning if a variable declaration shadows a |
| 2418 | * FINISHME: declaration at a higher scope. |
| 2419 | */ |
| 2420 | |
Ian Romanick | cec65a6 | 2010-03-23 12:28:44 -0700 | [diff] [blame] | 2421 | if ((decl_type == NULL) || decl_type->is_void()) { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2422 | if (type_name != NULL) { |
| 2423 | _mesa_glsl_error(& loc, state, |
| 2424 | "invalid type `%s' in declaration of `%s'", |
| 2425 | type_name, decl->identifier); |
| 2426 | } else { |
| 2427 | _mesa_glsl_error(& loc, state, |
| 2428 | "invalid type in declaration of `%s'", |
| 2429 | decl->identifier); |
| 2430 | } |
| 2431 | continue; |
| 2432 | } |
| 2433 | |
| 2434 | if (decl->is_array) { |
Kenneth Graunke | d8e34e2 | 2010-08-07 02:56:01 -0700 | [diff] [blame] | 2435 | var_type = process_array_type(&loc, decl_type, decl->array_size, |
| 2436 | state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2437 | } else { |
| 2438 | var_type = decl_type; |
| 2439 | } |
| 2440 | |
Ian Romanick | 7e2aa91 | 2010-07-19 17:12:42 -0700 | [diff] [blame] | 2441 | var = new(ctx) ir_variable(var_type, decl->identifier, ir_var_auto); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2442 | |
Eric Anholt | 3f15150 | 2010-04-02 01:53:57 -1000 | [diff] [blame] | 2443 | /* From page 22 (page 28 of the PDF) of the GLSL 1.10 specification; |
| 2444 | * |
| 2445 | * "Global variables can only use the qualifiers const, |
| 2446 | * attribute, uni form, or varying. Only one may be |
| 2447 | * specified. |
| 2448 | * |
| 2449 | * Local variables can only use the qualifier const." |
| 2450 | * |
Ian Romanick | 82c4b4f | 2011-01-07 16:53:07 -0800 | [diff] [blame] | 2451 | * This is relaxed in GLSL 1.30. It is also relaxed by any extension |
| 2452 | * that adds the 'layout' keyword. |
Eric Anholt | 3f15150 | 2010-04-02 01:53:57 -1000 | [diff] [blame] | 2453 | */ |
Ian Romanick | 82c4b4f | 2011-01-07 16:53:07 -0800 | [diff] [blame] | 2454 | if ((state->language_version < 130) |
| 2455 | && !state->ARB_explicit_attrib_location_enable |
| 2456 | && !state->ARB_fragment_coord_conventions_enable) { |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 2457 | if (this->type->qualifier.flags.q.out) { |
Eric Anholt | 3f15150 | 2010-04-02 01:53:57 -1000 | [diff] [blame] | 2458 | _mesa_glsl_error(& loc, state, |
| 2459 | "`out' qualifier in declaration of `%s' " |
Ian Romanick | 469ea69 | 2011-01-07 16:05:59 -0800 | [diff] [blame] | 2460 | "only valid for function parameters in %s.", |
| 2461 | decl->identifier, state->version_string); |
Eric Anholt | 3f15150 | 2010-04-02 01:53:57 -1000 | [diff] [blame] | 2462 | } |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 2463 | if (this->type->qualifier.flags.q.in) { |
Eric Anholt | 3f15150 | 2010-04-02 01:53:57 -1000 | [diff] [blame] | 2464 | _mesa_glsl_error(& loc, state, |
| 2465 | "`in' qualifier in declaration of `%s' " |
Ian Romanick | 469ea69 | 2011-01-07 16:05:59 -0800 | [diff] [blame] | 2466 | "only valid for function parameters in %s.", |
| 2467 | decl->identifier, state->version_string); |
Eric Anholt | 3f15150 | 2010-04-02 01:53:57 -1000 | [diff] [blame] | 2468 | } |
| 2469 | /* FINISHME: Test for other invalid qualifiers. */ |
| 2470 | } |
| 2471 | |
Eric Anholt | 2e063f1 | 2010-03-28 00:56:22 -0700 | [diff] [blame] | 2472 | apply_type_qualifier_to_variable(& this->type->qualifier, var, state, |
| 2473 | & loc); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2474 | |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 2475 | if (this->type->qualifier.flags.q.invariant) { |
Eric Anholt | 046bef2 | 2010-08-04 20:33:57 -0700 | [diff] [blame] | 2476 | if ((state->target == vertex_shader) && !(var->mode == ir_var_out || |
| 2477 | var->mode == ir_var_inout)) { |
| 2478 | /* FINISHME: Note that this doesn't work for invariant on |
| 2479 | * a function signature outval |
| 2480 | */ |
Ian Romanick | 6f0823d | 2010-07-01 20:39:08 -0700 | [diff] [blame] | 2481 | _mesa_glsl_error(& loc, state, |
| 2482 | "`%s' cannot be marked invariant, vertex shader " |
| 2483 | "outputs only\n", var->name); |
Eric Anholt | 046bef2 | 2010-08-04 20:33:57 -0700 | [diff] [blame] | 2484 | } else if ((state->target == fragment_shader) && |
| 2485 | !(var->mode == ir_var_in || var->mode == ir_var_inout)) { |
| 2486 | /* FINISHME: Note that this doesn't work for invariant on |
| 2487 | * a function signature inval |
| 2488 | */ |
Ian Romanick | 6f0823d | 2010-07-01 20:39:08 -0700 | [diff] [blame] | 2489 | _mesa_glsl_error(& loc, state, |
| 2490 | "`%s' cannot be marked invariant, fragment shader " |
| 2491 | "inputs only\n", var->name); |
| 2492 | } |
| 2493 | } |
| 2494 | |
Ian Romanick | e1c1a3f | 2010-03-31 12:26:03 -0700 | [diff] [blame] | 2495 | if (state->current_function != NULL) { |
Ian Romanick | b168e53 | 2010-03-31 12:31:18 -0700 | [diff] [blame] | 2496 | const char *mode = NULL; |
Ian Romanick | e080006 | 2010-03-31 13:15:23 -0700 | [diff] [blame] | 2497 | const char *extra = ""; |
Ian Romanick | b168e53 | 2010-03-31 12:31:18 -0700 | [diff] [blame] | 2498 | |
Ian Romanick | e080006 | 2010-03-31 13:15:23 -0700 | [diff] [blame] | 2499 | /* There is no need to check for 'inout' here because the parser will |
| 2500 | * only allow that in function parameter lists. |
Ian Romanick | e1c1a3f | 2010-03-31 12:26:03 -0700 | [diff] [blame] | 2501 | */ |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 2502 | if (this->type->qualifier.flags.q.attribute) { |
Ian Romanick | b168e53 | 2010-03-31 12:31:18 -0700 | [diff] [blame] | 2503 | mode = "attribute"; |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 2504 | } else if (this->type->qualifier.flags.q.uniform) { |
Ian Romanick | b168e53 | 2010-03-31 12:31:18 -0700 | [diff] [blame] | 2505 | mode = "uniform"; |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 2506 | } else if (this->type->qualifier.flags.q.varying) { |
Ian Romanick | b168e53 | 2010-03-31 12:31:18 -0700 | [diff] [blame] | 2507 | mode = "varying"; |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 2508 | } else if (this->type->qualifier.flags.q.in) { |
Ian Romanick | e080006 | 2010-03-31 13:15:23 -0700 | [diff] [blame] | 2509 | mode = "in"; |
| 2510 | extra = " or in function parameter list"; |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 2511 | } else if (this->type->qualifier.flags.q.out) { |
Ian Romanick | e080006 | 2010-03-31 13:15:23 -0700 | [diff] [blame] | 2512 | mode = "out"; |
| 2513 | extra = " or in function parameter list"; |
Ian Romanick | b168e53 | 2010-03-31 12:31:18 -0700 | [diff] [blame] | 2514 | } |
| 2515 | |
| 2516 | if (mode) { |
Ian Romanick | e1c1a3f | 2010-03-31 12:26:03 -0700 | [diff] [blame] | 2517 | _mesa_glsl_error(& loc, state, |
Ian Romanick | b168e53 | 2010-03-31 12:31:18 -0700 | [diff] [blame] | 2518 | "%s variable `%s' must be declared at " |
Ian Romanick | e080006 | 2010-03-31 13:15:23 -0700 | [diff] [blame] | 2519 | "global scope%s", |
| 2520 | mode, var->name, extra); |
Ian Romanick | e1c1a3f | 2010-03-31 12:26:03 -0700 | [diff] [blame] | 2521 | } |
| 2522 | } else if (var->mode == ir_var_in) { |
Chad Versace | 01a584d | 2011-01-20 14:12:16 -0800 | [diff] [blame] | 2523 | var->read_only = true; |
| 2524 | |
Ian Romanick | fb9f5b0 | 2010-03-29 17:16:35 -0700 | [diff] [blame] | 2525 | if (state->target == vertex_shader) { |
| 2526 | bool error_emitted = false; |
| 2527 | |
| 2528 | /* From page 31 (page 37 of the PDF) of the GLSL 1.50 spec: |
| 2529 | * |
| 2530 | * "Vertex shader inputs can only be float, floating-point |
| 2531 | * vectors, matrices, signed and unsigned integers and integer |
| 2532 | * vectors. Vertex shader inputs can also form arrays of these |
| 2533 | * types, but not structures." |
| 2534 | * |
Ian Romanick | 2d81620 | 2010-03-29 17:40:11 -0700 | [diff] [blame] | 2535 | * From page 31 (page 27 of the PDF) of the GLSL 1.30 spec: |
| 2536 | * |
| 2537 | * "Vertex shader inputs can only be float, floating-point |
| 2538 | * vectors, matrices, signed and unsigned integers and integer |
| 2539 | * vectors. They cannot be arrays or structures." |
| 2540 | * |
Ian Romanick | fb9f5b0 | 2010-03-29 17:16:35 -0700 | [diff] [blame] | 2541 | * From page 23 (page 29 of the PDF) of the GLSL 1.20 spec: |
| 2542 | * |
| 2543 | * "The attribute qualifier can be used only with float, |
| 2544 | * floating-point vectors, and matrices. Attribute variables |
| 2545 | * cannot be declared as arrays or structures." |
| 2546 | */ |
| 2547 | const glsl_type *check_type = var->type->is_array() |
| 2548 | ? var->type->fields.array : var->type; |
| 2549 | |
| 2550 | switch (check_type->base_type) { |
| 2551 | case GLSL_TYPE_FLOAT: |
| 2552 | break; |
| 2553 | case GLSL_TYPE_UINT: |
| 2554 | case GLSL_TYPE_INT: |
| 2555 | if (state->language_version > 120) |
| 2556 | break; |
| 2557 | /* FALLTHROUGH */ |
| 2558 | default: |
| 2559 | _mesa_glsl_error(& loc, state, |
| 2560 | "vertex shader input / attribute cannot have " |
| 2561 | "type %s`%s'", |
| 2562 | var->type->is_array() ? "array of " : "", |
| 2563 | check_type->name); |
| 2564 | error_emitted = true; |
| 2565 | } |
| 2566 | |
Ian Romanick | 2d81620 | 2010-03-29 17:40:11 -0700 | [diff] [blame] | 2567 | if (!error_emitted && (state->language_version <= 130) |
Ian Romanick | fb9f5b0 | 2010-03-29 17:16:35 -0700 | [diff] [blame] | 2568 | && var->type->is_array()) { |
| 2569 | _mesa_glsl_error(& loc, state, |
| 2570 | "vertex shader input / attribute cannot have " |
| 2571 | "array type"); |
| 2572 | error_emitted = true; |
| 2573 | } |
| 2574 | } |
| 2575 | } |
| 2576 | |
Chad Versace | 68d06b1 | 2010-12-16 11:06:19 -0800 | [diff] [blame] | 2577 | /* Integer vertex outputs must be qualified with 'flat'. |
| 2578 | * |
| 2579 | * From section 4.3.6 of the GLSL 1.30 spec: |
| 2580 | * "If a vertex output is a signed or unsigned integer or integer |
| 2581 | * vector, then it must be qualified with the interpolation qualifier |
| 2582 | * flat." |
| 2583 | */ |
| 2584 | if (state->language_version >= 130 |
| 2585 | && state->target == vertex_shader |
| 2586 | && state->current_function == NULL |
| 2587 | && var->type->is_integer() |
| 2588 | && var->mode == ir_var_out |
| 2589 | && var->interpolation != ir_var_flat) { |
| 2590 | |
| 2591 | _mesa_glsl_error(&loc, state, "If a vertex output is an integer, " |
| 2592 | "then it must be qualified with 'flat'"); |
| 2593 | } |
| 2594 | |
| 2595 | |
Chad Versace | 605aacc | 2011-01-11 17:21:18 -0800 | [diff] [blame] | 2596 | /* Interpolation qualifiers cannot be applied to 'centroid' and |
| 2597 | * 'centroid varying'. |
| 2598 | * |
| 2599 | * From page 29 (page 35 of the PDF) of the GLSL 1.30 spec: |
| 2600 | * "interpolation qualifiers may only precede the qualifiers in, |
| 2601 | * centroid in, out, or centroid out in a declaration. They do not apply |
| 2602 | * to the deprecated storage qualifiers varying or centroid varying." |
| 2603 | */ |
| 2604 | if (state->language_version >= 130 |
| 2605 | && this->type->qualifier.has_interpolation() |
| 2606 | && this->type->qualifier.flags.q.varying) { |
| 2607 | |
| 2608 | const char *i = this->type->qualifier.interpolation_string(); |
| 2609 | assert(i != NULL); |
| 2610 | const char *s; |
| 2611 | if (this->type->qualifier.flags.q.centroid) |
| 2612 | s = "centroid varying"; |
| 2613 | else |
| 2614 | s = "varying"; |
| 2615 | |
| 2616 | _mesa_glsl_error(&loc, state, |
| 2617 | "qualifier '%s' cannot be applied to the " |
| 2618 | "deprecated storage qualifier '%s'", i, s); |
| 2619 | } |
| 2620 | |
| 2621 | |
Chad Versace | 8faaa4a | 2011-01-11 18:13:26 -0800 | [diff] [blame] | 2622 | /* Interpolation qualifiers can only apply to vertex shader outputs and |
| 2623 | * fragment shader inputs. |
| 2624 | * |
| 2625 | * From page 29 (page 35 of the PDF) of the GLSL 1.30 spec: |
| 2626 | * "Outputs from a vertex shader (out) and inputs to a fragment |
| 2627 | * shader (in) can be further qualified with one or more of these |
| 2628 | * interpolation qualifiers" |
| 2629 | */ |
| 2630 | if (state->language_version >= 130 |
| 2631 | && this->type->qualifier.has_interpolation()) { |
| 2632 | |
| 2633 | const char *i = this->type->qualifier.interpolation_string(); |
| 2634 | assert(i != NULL); |
| 2635 | |
| 2636 | switch (state->target) { |
| 2637 | case vertex_shader: |
| 2638 | if (this->type->qualifier.flags.q.in) { |
| 2639 | _mesa_glsl_error(&loc, state, |
| 2640 | "qualifier '%s' cannot be applied to vertex " |
| 2641 | "shader inputs", i); |
| 2642 | } |
| 2643 | break; |
| 2644 | case fragment_shader: |
| 2645 | if (this->type->qualifier.flags.q.out) { |
| 2646 | _mesa_glsl_error(&loc, state, |
| 2647 | "qualifier '%s' cannot be applied to fragment " |
| 2648 | "shader outputs", i); |
| 2649 | } |
| 2650 | break; |
| 2651 | default: |
| 2652 | assert(0); |
| 2653 | } |
| 2654 | } |
| 2655 | |
| 2656 | |
Chad Versace | 1eb0f17 | 2011-01-11 18:24:17 -0800 | [diff] [blame] | 2657 | /* From section 4.3.4 of the GLSL 1.30 spec: |
| 2658 | * "It is an error to use centroid in in a vertex shader." |
| 2659 | */ |
| 2660 | if (state->language_version >= 130 |
| 2661 | && this->type->qualifier.flags.q.centroid |
| 2662 | && this->type->qualifier.flags.q.in |
| 2663 | && state->target == vertex_shader) { |
| 2664 | |
| 2665 | _mesa_glsl_error(&loc, state, |
| 2666 | "'centroid in' cannot be used in a vertex shader"); |
| 2667 | } |
| 2668 | |
| 2669 | |
Chad Versace | 889e1a5 | 2011-01-16 22:38:45 -0800 | [diff] [blame] | 2670 | /* Precision qualifiers exists only in GLSL versions 1.00 and >= 1.30. |
| 2671 | */ |
| 2672 | if (this->type->specifier->precision != ast_precision_none |
| 2673 | && state->language_version != 100 |
| 2674 | && state->language_version < 130) { |
| 2675 | |
| 2676 | _mesa_glsl_error(&loc, state, |
| 2677 | "precision qualifiers are supported only in GLSL ES " |
| 2678 | "1.00, and GLSL 1.30 and later"); |
| 2679 | } |
| 2680 | |
| 2681 | |
Chad Versace | 45e8e6c | 2011-01-17 15:28:39 -0800 | [diff] [blame] | 2682 | /* Precision qualifiers only apply to floating point and integer types. |
Chad Versace | 889e1a5 | 2011-01-16 22:38:45 -0800 | [diff] [blame] | 2683 | * |
| 2684 | * From section 4.5.2 of the GLSL 1.30 spec: |
| 2685 | * "Any floating point or any integer declaration can have the type |
| 2686 | * preceded by one of these precision qualifiers [...] Literal |
| 2687 | * constants do not have precision qualifiers. Neither do Boolean |
| 2688 | * variables. |
Kenneth Graunke | 8752824 | 2011-03-26 23:37:09 -0700 | [diff] [blame] | 2689 | * |
| 2690 | * In GLSL ES, sampler types are also allowed. |
| 2691 | * |
| 2692 | * From page 87 of the GLSL ES spec: |
| 2693 | * "RESOLUTION: Allow sampler types to take a precision qualifier." |
Chad Versace | 889e1a5 | 2011-01-16 22:38:45 -0800 | [diff] [blame] | 2694 | */ |
| 2695 | if (this->type->specifier->precision != ast_precision_none |
Chad Versace | 45e8e6c | 2011-01-17 15:28:39 -0800 | [diff] [blame] | 2696 | && !var->type->is_float() |
| 2697 | && !var->type->is_integer() |
Kenneth Graunke | 8752824 | 2011-03-26 23:37:09 -0700 | [diff] [blame] | 2698 | && !(var->type->is_sampler() && state->es_shader) |
Chad Versace | 45e8e6c | 2011-01-17 15:28:39 -0800 | [diff] [blame] | 2699 | && !(var->type->is_array() |
| 2700 | && (var->type->fields.array->is_float() |
| 2701 | || var->type->fields.array->is_integer()))) { |
Chad Versace | 889e1a5 | 2011-01-16 22:38:45 -0800 | [diff] [blame] | 2702 | |
| 2703 | _mesa_glsl_error(&loc, state, |
Kenneth Graunke | 8752824 | 2011-03-26 23:37:09 -0700 | [diff] [blame] | 2704 | "precision qualifiers apply only to floating point" |
| 2705 | "%s types", state->es_shader ? ", integer, and sampler" |
| 2706 | : "and integer"); |
Chad Versace | 889e1a5 | 2011-01-16 22:38:45 -0800 | [diff] [blame] | 2707 | } |
| 2708 | |
Paul Berry | f072210 | 2011-07-12 12:03:02 -0700 | [diff] [blame] | 2709 | /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec: |
| 2710 | * |
| 2711 | * "[Sampler types] can only be declared as function |
| 2712 | * parameters or uniform variables (see Section 4.3.5 |
| 2713 | * "Uniform")". |
| 2714 | */ |
| 2715 | if (var_type->contains_sampler() && |
| 2716 | !this->type->qualifier.flags.q.uniform) { |
| 2717 | _mesa_glsl_error(&loc, state, "samplers must be declared uniform"); |
| 2718 | } |
| 2719 | |
Ian Romanick | e78e0fa | 2010-07-07 12:13:34 -0700 | [diff] [blame] | 2720 | /* Process the initializer and add its instructions to a temporary |
| 2721 | * list. This list will be added to the instruction stream (below) after |
| 2722 | * the declaration is added. This is done because in some cases (such as |
| 2723 | * redeclarations) the declaration may not actually be added to the |
| 2724 | * instruction stream. |
| 2725 | */ |
Eric Anholt | fa33d0b | 2010-07-29 13:50:17 -0700 | [diff] [blame] | 2726 | exec_list initializer_instructions; |
Ian Romanick | 09a4ba0 | 2011-03-04 16:15:20 -0800 | [diff] [blame] | 2727 | ir_variable *earlier = get_variable_being_redeclared(var, decl, state); |
| 2728 | |
Ian Romanick | 66faec4 | 2010-03-27 18:56:53 -0700 | [diff] [blame] | 2729 | if (decl->initializer != NULL) { |
Ian Romanick | 09a4ba0 | 2011-03-04 16:15:20 -0800 | [diff] [blame] | 2730 | result = process_initializer((earlier == NULL) ? var : earlier, |
| 2731 | decl, this->type, |
Ian Romanick | 0292ffb | 2011-03-04 15:29:33 -0800 | [diff] [blame] | 2732 | &initializer_instructions, state); |
Ian Romanick | 1936015 | 2010-03-26 18:05:27 -0700 | [diff] [blame] | 2733 | } |
Ian Romanick | 17d86f4 | 2010-03-29 12:59:02 -0700 | [diff] [blame] | 2734 | |
Eric Anholt | 0ed6125 | 2010-03-31 09:29:33 -1000 | [diff] [blame] | 2735 | /* From page 23 (page 29 of the PDF) of the GLSL 1.10 spec: |
| 2736 | * |
| 2737 | * "It is an error to write to a const variable outside of |
| 2738 | * its declaration, so they must be initialized when |
| 2739 | * declared." |
| 2740 | */ |
Ian Romanick | e24d35a | 2010-10-05 16:38:47 -0700 | [diff] [blame] | 2741 | if (this->type->qualifier.flags.q.constant && decl->initializer == NULL) { |
Eric Anholt | 0ed6125 | 2010-03-31 09:29:33 -1000 | [diff] [blame] | 2742 | _mesa_glsl_error(& loc, state, |
Chad Versace | 46f7105 | 2011-01-18 15:15:19 -0800 | [diff] [blame] | 2743 | "const declaration of `%s' must be initialized", |
| 2744 | decl->identifier); |
Eric Anholt | 0ed6125 | 2010-03-31 09:29:33 -1000 | [diff] [blame] | 2745 | } |
| 2746 | |
Ian Romanick | 09a4ba0 | 2011-03-04 16:15:20 -0800 | [diff] [blame] | 2747 | /* If the declaration is not a redeclaration, there are a few additional |
| 2748 | * semantic checks that must be applied. In addition, variable that was |
| 2749 | * created for the declaration should be added to the IR stream. |
| 2750 | */ |
| 2751 | if (earlier == NULL) { |
| 2752 | /* From page 15 (page 21 of the PDF) of the GLSL 1.10 spec, |
| 2753 | * |
| 2754 | * "Identifiers starting with "gl_" are reserved for use by |
| 2755 | * OpenGL, and may not be declared in a shader as either a |
| 2756 | * variable or a function." |
| 2757 | */ |
| 2758 | if (strncmp(decl->identifier, "gl_", 3) == 0) |
| 2759 | _mesa_glsl_error(& loc, state, |
| 2760 | "identifier `%s' uses reserved `gl_' prefix", |
| 2761 | decl->identifier); |
| 2762 | |
| 2763 | /* Add the variable to the symbol table. Note that the initializer's |
| 2764 | * IR was already processed earlier (though it hasn't been emitted |
| 2765 | * yet), without the variable in scope. |
| 2766 | * |
| 2767 | * This differs from most C-like languages, but it follows the GLSL |
| 2768 | * specification. From page 28 (page 34 of the PDF) of the GLSL 1.50 |
| 2769 | * spec: |
| 2770 | * |
| 2771 | * "Within a declaration, the scope of a name starts immediately |
| 2772 | * after the initializer if present or immediately after the name |
| 2773 | * being declared if not." |
| 2774 | */ |
| 2775 | if (!state->symbols->add_variable(var)) { |
| 2776 | YYLTYPE loc = this->get_location(); |
| 2777 | _mesa_glsl_error(&loc, state, "name `%s' already taken in the " |
| 2778 | "current scope", decl->identifier); |
| 2779 | continue; |
| 2780 | } |
| 2781 | |
| 2782 | /* Push the variable declaration to the top. It means that all the |
| 2783 | * variable declarations will appear in a funny last-to-first order, |
| 2784 | * but otherwise we run into trouble if a function is prototyped, a |
| 2785 | * global var is decled, then the function is defined with usage of |
| 2786 | * the global var. See glslparsertest's CorrectModule.frag. |
| 2787 | */ |
| 2788 | instructions->push_head(var); |
Ian Romanick | 5466b63 | 2010-07-01 12:46:55 -0700 | [diff] [blame] | 2789 | } |
| 2790 | |
Eric Anholt | fa33d0b | 2010-07-29 13:50:17 -0700 | [diff] [blame] | 2791 | instructions->append_list(&initializer_instructions); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2792 | } |
| 2793 | |
Eric Anholt | 8558459 | 2010-04-14 15:38:52 -0700 | [diff] [blame] | 2794 | |
| 2795 | /* Generally, variable declarations do not have r-values. However, |
| 2796 | * one is used for the declaration in |
| 2797 | * |
| 2798 | * while (bool b = some_condition()) { |
| 2799 | * ... |
| 2800 | * } |
| 2801 | * |
| 2802 | * so we return the rvalue from the last seen declaration here. |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2803 | */ |
Eric Anholt | 8558459 | 2010-04-14 15:38:52 -0700 | [diff] [blame] | 2804 | return result; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2805 | } |
| 2806 | |
| 2807 | |
Kenneth Graunke | fb9fb5f | 2010-03-26 00:25:36 -0700 | [diff] [blame] | 2808 | ir_rvalue * |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 2809 | ast_parameter_declarator::hir(exec_list *instructions, |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 2810 | struct _mesa_glsl_parse_state *state) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2811 | { |
Kenneth Graunke | 953ff12 | 2010-06-25 13:14:37 -0700 | [diff] [blame] | 2812 | void *ctx = state; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2813 | const struct glsl_type *type; |
| 2814 | const char *name = NULL; |
Eric Anholt | 2e063f1 | 2010-03-28 00:56:22 -0700 | [diff] [blame] | 2815 | YYLTYPE loc = this->get_location(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2816 | |
Ian Romanick | d612a12 | 2010-03-31 16:22:06 -0700 | [diff] [blame] | 2817 | type = this->type->specifier->glsl_type(& name, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2818 | |
| 2819 | if (type == NULL) { |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2820 | if (name != NULL) { |
| 2821 | _mesa_glsl_error(& loc, state, |
| 2822 | "invalid type `%s' in declaration of `%s'", |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 2823 | name, this->identifier); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2824 | } else { |
| 2825 | _mesa_glsl_error(& loc, state, |
| 2826 | "invalid type in declaration of `%s'", |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 2827 | this->identifier); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2828 | } |
| 2829 | |
Ian Romanick | 0471e8b | 2010-03-26 14:33:41 -0700 | [diff] [blame] | 2830 | type = glsl_type::error_type; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2831 | } |
| 2832 | |
Eric Anholt | 068c80c | 2010-03-31 09:56:36 -1000 | [diff] [blame] | 2833 | /* From page 62 (page 68 of the PDF) of the GLSL 1.50 spec: |
| 2834 | * |
| 2835 | * "Functions that accept no input arguments need not use void in the |
| 2836 | * argument list because prototypes (or definitions) are required and |
| 2837 | * therefore there is no ambiguity when an empty argument list "( )" is |
| 2838 | * declared. The idiom "(void)" as a parameter list is provided for |
| 2839 | * convenience." |
| 2840 | * |
| 2841 | * Placing this check here prevents a void parameter being set up |
| 2842 | * for a function, which avoids tripping up checks for main taking |
| 2843 | * parameters and lookups of an unnamed symbol. |
| 2844 | */ |
Ian Romanick | cf37c9e | 2010-04-02 15:30:45 -0700 | [diff] [blame] | 2845 | if (type->is_void()) { |
| 2846 | if (this->identifier != NULL) |
| 2847 | _mesa_glsl_error(& loc, state, |
| 2848 | "named parameter cannot have type `void'"); |
| 2849 | |
| 2850 | is_void = true; |
Eric Anholt | 068c80c | 2010-03-31 09:56:36 -1000 | [diff] [blame] | 2851 | return NULL; |
Ian Romanick | cf37c9e | 2010-04-02 15:30:45 -0700 | [diff] [blame] | 2852 | } |
Eric Anholt | 068c80c | 2010-03-31 09:56:36 -1000 | [diff] [blame] | 2853 | |
Ian Romanick | 45d8a70 | 2010-04-02 15:09:33 -0700 | [diff] [blame] | 2854 | if (formal_parameter && (this->identifier == NULL)) { |
| 2855 | _mesa_glsl_error(& loc, state, "formal parameter lacks a name"); |
| 2856 | return NULL; |
| 2857 | } |
| 2858 | |
Kenneth Graunke | e511a35 | 2010-08-21 15:30:34 -0700 | [diff] [blame] | 2859 | /* This only handles "vec4 foo[..]". The earlier specifier->glsl_type(...) |
| 2860 | * call already handled the "vec4[..] foo" case. |
| 2861 | */ |
| 2862 | if (this->is_array) { |
Kenneth Graunke | d8e34e2 | 2010-08-07 02:56:01 -0700 | [diff] [blame] | 2863 | type = process_array_type(&loc, type, this->array_size, state); |
Kenneth Graunke | e511a35 | 2010-08-21 15:30:34 -0700 | [diff] [blame] | 2864 | } |
| 2865 | |
| 2866 | if (type->array_size() == 0) { |
| 2867 | _mesa_glsl_error(&loc, state, "arrays passed as parameters must have " |
| 2868 | "a declared size."); |
| 2869 | type = glsl_type::error_type; |
| 2870 | } |
| 2871 | |
Ian Romanick | cf37c9e | 2010-04-02 15:30:45 -0700 | [diff] [blame] | 2872 | is_void = false; |
Ian Romanick | 7e2aa91 | 2010-07-19 17:12:42 -0700 | [diff] [blame] | 2873 | ir_variable *var = new(ctx) ir_variable(type, this->identifier, ir_var_in); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2874 | |
Ian Romanick | cdb8d54 | 2010-03-11 14:48:51 -0800 | [diff] [blame] | 2875 | /* Apply any specified qualifiers to the parameter declaration. Note that |
| 2876 | * for function parameters the default mode is 'in'. |
| 2877 | */ |
Eric Anholt | 2e063f1 | 2010-03-28 00:56:22 -0700 | [diff] [blame] | 2878 | apply_type_qualifier_to_variable(& this->type->qualifier, var, state, & loc); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2879 | |
Paul Berry | f072210 | 2011-07-12 12:03:02 -0700 | [diff] [blame] | 2880 | /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec: |
| 2881 | * |
| 2882 | * "Samplers cannot be treated as l-values; hence cannot be used |
| 2883 | * as out or inout function parameters, nor can they be assigned |
| 2884 | * into." |
| 2885 | */ |
| 2886 | if ((var->mode == ir_var_inout || var->mode == ir_var_out) |
| 2887 | && type->contains_sampler()) { |
| 2888 | _mesa_glsl_error(&loc, state, "out and inout parameters cannot contain samplers"); |
| 2889 | type = glsl_type::error_type; |
| 2890 | } |
| 2891 | |
Ian Romanick | 0044e7e | 2010-03-08 23:44:00 -0800 | [diff] [blame] | 2892 | instructions->push_tail(var); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2893 | |
| 2894 | /* Parameter declarations do not have r-values. |
| 2895 | */ |
| 2896 | return NULL; |
| 2897 | } |
| 2898 | |
| 2899 | |
Ian Romanick | 45d8a70 | 2010-04-02 15:09:33 -0700 | [diff] [blame] | 2900 | void |
Ian Romanick | 304ea90 | 2010-05-10 11:17:53 -0700 | [diff] [blame] | 2901 | ast_parameter_declarator::parameters_to_hir(exec_list *ast_parameters, |
Ian Romanick | 45d8a70 | 2010-04-02 15:09:33 -0700 | [diff] [blame] | 2902 | bool formal, |
| 2903 | exec_list *ir_parameters, |
| 2904 | _mesa_glsl_parse_state *state) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2905 | { |
Ian Romanick | cf37c9e | 2010-04-02 15:30:45 -0700 | [diff] [blame] | 2906 | ast_parameter_declarator *void_param = NULL; |
| 2907 | unsigned count = 0; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2908 | |
Ian Romanick | 2b97dc6 | 2010-05-10 17:42:05 -0700 | [diff] [blame] | 2909 | foreach_list_typed (ast_parameter_declarator, param, link, ast_parameters) { |
Ian Romanick | 45d8a70 | 2010-04-02 15:09:33 -0700 | [diff] [blame] | 2910 | param->formal_parameter = formal; |
Eric Anholt | 068c80c | 2010-03-31 09:56:36 -1000 | [diff] [blame] | 2911 | param->hir(ir_parameters, state); |
Ian Romanick | cf37c9e | 2010-04-02 15:30:45 -0700 | [diff] [blame] | 2912 | |
| 2913 | if (param->is_void) |
| 2914 | void_param = param; |
| 2915 | |
| 2916 | count++; |
| 2917 | } |
| 2918 | |
| 2919 | if ((void_param != NULL) && (count > 1)) { |
| 2920 | YYLTYPE loc = void_param->get_location(); |
| 2921 | |
| 2922 | _mesa_glsl_error(& loc, state, |
| 2923 | "`void' parameter must be only parameter"); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2924 | } |
| 2925 | } |
| 2926 | |
| 2927 | |
Kenneth Graunke | 6fae1e4 | 2010-12-06 10:54:05 -0800 | [diff] [blame] | 2928 | void |
| 2929 | emit_function(_mesa_glsl_parse_state *state, exec_list *instructions, |
| 2930 | ir_function *f) |
| 2931 | { |
| 2932 | /* Emit the new function header */ |
| 2933 | if (state->current_function == NULL) { |
| 2934 | instructions->push_tail(f); |
| 2935 | } else { |
| 2936 | /* IR invariants disallow function declarations or definitions nested |
| 2937 | * within other function definitions. Insert the new ir_function |
| 2938 | * block in the instruction sequence before the ir_function block |
| 2939 | * containing the current ir_function_signature. |
| 2940 | */ |
| 2941 | ir_function *const curr = |
| 2942 | const_cast<ir_function *>(state->current_function->function()); |
| 2943 | |
| 2944 | curr->insert_before(f); |
| 2945 | } |
| 2946 | } |
| 2947 | |
| 2948 | |
Kenneth Graunke | fb9fb5f | 2010-03-26 00:25:36 -0700 | [diff] [blame] | 2949 | ir_rvalue * |
Ian Romanick | 92318a9 | 2010-03-31 18:23:21 -0700 | [diff] [blame] | 2950 | ast_function::hir(exec_list *instructions, |
| 2951 | struct _mesa_glsl_parse_state *state) |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2952 | { |
Kenneth Graunke | 953ff12 | 2010-06-25 13:14:37 -0700 | [diff] [blame] | 2953 | void *ctx = state; |
Ian Romanick | 18238de | 2010-03-01 13:49:10 -0800 | [diff] [blame] | 2954 | ir_function *f = NULL; |
Ian Romanick | 92318a9 | 2010-03-31 18:23:21 -0700 | [diff] [blame] | 2955 | ir_function_signature *sig = NULL; |
| 2956 | exec_list hir_parameters; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2957 | |
Kenneth Graunke | ac04c25 | 2010-06-29 00:48:10 -0700 | [diff] [blame] | 2958 | const char *const name = identifier; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2959 | |
Ian Romanick | 63b80f8 | 2010-09-01 06:34:58 -0700 | [diff] [blame] | 2960 | /* From page 21 (page 27 of the PDF) of the GLSL 1.20 spec, |
| 2961 | * |
| 2962 | * "Function declarations (prototypes) cannot occur inside of functions; |
| 2963 | * they must be at global scope, or for the built-in functions, outside |
| 2964 | * the global scope." |
| 2965 | * |
| 2966 | * From page 27 (page 33 of the PDF) of the GLSL ES 1.00.16 spec, |
| 2967 | * |
| 2968 | * "User defined functions may only be defined within the global scope." |
| 2969 | * |
| 2970 | * Note that this language does not appear in GLSL 1.10. |
| 2971 | */ |
| 2972 | if ((state->current_function != NULL) && (state->language_version != 110)) { |
| 2973 | YYLTYPE loc = this->get_location(); |
| 2974 | _mesa_glsl_error(&loc, state, |
| 2975 | "declaration of function `%s' not allowed within " |
| 2976 | "function body", name); |
| 2977 | } |
| 2978 | |
Kenneth Graunke | edd180f | 2010-08-20 02:14:35 -0700 | [diff] [blame] | 2979 | /* From page 15 (page 21 of the PDF) of the GLSL 1.10 spec, |
| 2980 | * |
| 2981 | * "Identifiers starting with "gl_" are reserved for use by |
| 2982 | * OpenGL, and may not be declared in a shader as either a |
| 2983 | * variable or a function." |
| 2984 | */ |
| 2985 | if (strncmp(name, "gl_", 3) == 0) { |
| 2986 | YYLTYPE loc = this->get_location(); |
| 2987 | _mesa_glsl_error(&loc, state, |
| 2988 | "identifier `%s' uses reserved `gl_' prefix", name); |
| 2989 | } |
| 2990 | |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2991 | /* Convert the list of function parameters to HIR now so that they can be |
| 2992 | * used below to compare this function's signature with previously seen |
| 2993 | * signatures for functions with the same name. |
| 2994 | */ |
Ian Romanick | 45d8a70 | 2010-04-02 15:09:33 -0700 | [diff] [blame] | 2995 | ast_parameter_declarator::parameters_to_hir(& this->parameters, |
| 2996 | is_definition, |
| 2997 | & hir_parameters, state); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 2998 | |
Ian Romanick | e39cc69 | 2010-03-23 12:19:13 -0700 | [diff] [blame] | 2999 | const char *return_type_name; |
| 3000 | const glsl_type *return_type = |
Ian Romanick | 92318a9 | 2010-03-31 18:23:21 -0700 | [diff] [blame] | 3001 | this->return_type->specifier->glsl_type(& return_type_name, state); |
Ian Romanick | e39cc69 | 2010-03-23 12:19:13 -0700 | [diff] [blame] | 3002 | |
Eric Anholt | 76e96d7 | 2010-08-23 13:26:52 -0700 | [diff] [blame] | 3003 | if (!return_type) { |
| 3004 | YYLTYPE loc = this->get_location(); |
| 3005 | _mesa_glsl_error(&loc, state, |
| 3006 | "function `%s' has undeclared return type `%s'", |
| 3007 | name, return_type_name); |
| 3008 | return_type = glsl_type::error_type; |
| 3009 | } |
Ian Romanick | e39cc69 | 2010-03-23 12:19:13 -0700 | [diff] [blame] | 3010 | |
Kenneth Graunke | ac04c25 | 2010-06-29 00:48:10 -0700 | [diff] [blame] | 3011 | /* From page 56 (page 62 of the PDF) of the GLSL 1.30 spec: |
| 3012 | * "No qualifier is allowed on the return type of a function." |
| 3013 | */ |
| 3014 | if (this->return_type->has_qualifiers()) { |
| 3015 | YYLTYPE loc = this->get_location(); |
| 3016 | _mesa_glsl_error(& loc, state, |
| 3017 | "function `%s' return type has qualifiers", name); |
| 3018 | } |
| 3019 | |
Paul Berry | f072210 | 2011-07-12 12:03:02 -0700 | [diff] [blame] | 3020 | /* From page 17 (page 23 of the PDF) of the GLSL 1.20 spec: |
| 3021 | * |
| 3022 | * "[Sampler types] can only be declared as function parameters |
| 3023 | * or uniform variables (see Section 4.3.5 "Uniform")". |
| 3024 | */ |
| 3025 | if (return_type->contains_sampler()) { |
| 3026 | YYLTYPE loc = this->get_location(); |
| 3027 | _mesa_glsl_error(&loc, state, |
| 3028 | "function `%s' return type can't contain a sampler", |
| 3029 | name); |
| 3030 | } |
| 3031 | |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3032 | /* Verify that this function's signature either doesn't match a previously |
| 3033 | * seen signature for a function with the same name, or, if a match is found, |
| 3034 | * that the previously seen signature does not have an associated definition. |
| 3035 | */ |
Ian Romanick | e466b18 | 2010-09-01 14:16:53 -0700 | [diff] [blame] | 3036 | f = state->symbols->get_function(name); |
Kenneth Graunke | 81f0339 | 2010-09-16 02:52:25 -0700 | [diff] [blame] | 3037 | if (f != NULL && (state->es_shader || f->has_user_signature())) { |
Ian Romanick | 202604e | 2010-08-11 16:58:25 -0700 | [diff] [blame] | 3038 | sig = f->exact_matching_signature(&hir_parameters); |
Kenneth Graunke | 0d605cb | 2010-04-28 12:04:23 -0700 | [diff] [blame] | 3039 | if (sig != NULL) { |
| 3040 | const char *badvar = sig->qualifiers_match(&hir_parameters); |
| 3041 | if (badvar != NULL) { |
| 3042 | YYLTYPE loc = this->get_location(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3043 | |
Kenneth Graunke | 0d605cb | 2010-04-28 12:04:23 -0700 | [diff] [blame] | 3044 | _mesa_glsl_error(&loc, state, "function `%s' parameter `%s' " |
| 3045 | "qualifiers don't match prototype", name, badvar); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3046 | } |
| 3047 | |
Kenneth Graunke | 0d605cb | 2010-04-28 12:04:23 -0700 | [diff] [blame] | 3048 | if (sig->return_type != return_type) { |
| 3049 | YYLTYPE loc = this->get_location(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3050 | |
Kenneth Graunke | 0d605cb | 2010-04-28 12:04:23 -0700 | [diff] [blame] | 3051 | _mesa_glsl_error(&loc, state, "function `%s' return type doesn't " |
| 3052 | "match prototype", name); |
| 3053 | } |
| 3054 | |
| 3055 | if (is_definition && sig->is_defined) { |
| 3056 | YYLTYPE loc = this->get_location(); |
| 3057 | |
| 3058 | _mesa_glsl_error(& loc, state, "function `%s' redefined", name); |
Kenneth Graunke | 0d605cb | 2010-04-28 12:04:23 -0700 | [diff] [blame] | 3059 | } |
| 3060 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3061 | } else { |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 3062 | f = new(ctx) ir_function(name); |
Eric Anholt | e8f5ebf | 2010-11-05 06:08:45 -0700 | [diff] [blame] | 3063 | if (!state->symbols->add_function(f)) { |
Kenneth Graunke | e095913 | 2010-08-25 16:37:46 -0700 | [diff] [blame] | 3064 | /* This function name shadows a non-function use of the same name. */ |
| 3065 | YYLTYPE loc = this->get_location(); |
| 3066 | |
| 3067 | _mesa_glsl_error(&loc, state, "function name `%s' conflicts with " |
| 3068 | "non-function", name); |
| 3069 | return NULL; |
| 3070 | } |
Kenneth Graunke | 9fa99f3 | 2010-04-21 12:30:22 -0700 | [diff] [blame] | 3071 | |
Kenneth Graunke | 6fae1e4 | 2010-12-06 10:54:05 -0800 | [diff] [blame] | 3072 | emit_function(state, instructions, f); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3073 | } |
| 3074 | |
Eric Anholt | ab372da | 2010-03-28 01:24:55 -0700 | [diff] [blame] | 3075 | /* Verify the return type of main() */ |
| 3076 | if (strcmp(name, "main") == 0) { |
Ian Romanick | 25711a8 | 2010-03-31 17:39:10 -0700 | [diff] [blame] | 3077 | if (! return_type->is_void()) { |
Eric Anholt | ab372da | 2010-03-28 01:24:55 -0700 | [diff] [blame] | 3078 | YYLTYPE loc = this->get_location(); |
| 3079 | |
| 3080 | _mesa_glsl_error(& loc, state, "main() must return void"); |
| 3081 | } |
Eric Anholt | 174cc03 | 2010-03-30 23:37:51 -1000 | [diff] [blame] | 3082 | |
Ian Romanick | 92318a9 | 2010-03-31 18:23:21 -0700 | [diff] [blame] | 3083 | if (!hir_parameters.is_empty()) { |
Eric Anholt | 174cc03 | 2010-03-30 23:37:51 -1000 | [diff] [blame] | 3084 | YYLTYPE loc = this->get_location(); |
| 3085 | |
| 3086 | _mesa_glsl_error(& loc, state, "main() must not take any parameters"); |
| 3087 | } |
Eric Anholt | ab372da | 2010-03-28 01:24:55 -0700 | [diff] [blame] | 3088 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3089 | |
| 3090 | /* Finish storing the information about this new function in its signature. |
| 3091 | */ |
Ian Romanick | 92318a9 | 2010-03-31 18:23:21 -0700 | [diff] [blame] | 3092 | if (sig == NULL) { |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 3093 | sig = new(ctx) ir_function_signature(return_type); |
Ian Romanick | 92318a9 | 2010-03-31 18:23:21 -0700 | [diff] [blame] | 3094 | f->add_signature(sig); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3095 | } |
| 3096 | |
Kenneth Graunke | bff6013 | 2010-04-28 12:44:24 -0700 | [diff] [blame] | 3097 | sig->replace_parameters(&hir_parameters); |
Ian Romanick | 92318a9 | 2010-03-31 18:23:21 -0700 | [diff] [blame] | 3098 | signature = sig; |
Ian Romanick | e29a585 | 2010-03-31 17:54:26 -0700 | [diff] [blame] | 3099 | |
Ian Romanick | 92318a9 | 2010-03-31 18:23:21 -0700 | [diff] [blame] | 3100 | /* Function declarations (prototypes) do not have r-values. |
| 3101 | */ |
| 3102 | return NULL; |
| 3103 | } |
| 3104 | |
| 3105 | |
| 3106 | ir_rvalue * |
| 3107 | ast_function_definition::hir(exec_list *instructions, |
| 3108 | struct _mesa_glsl_parse_state *state) |
| 3109 | { |
| 3110 | prototype->is_definition = true; |
| 3111 | prototype->hir(instructions, state); |
| 3112 | |
| 3113 | ir_function_signature *signature = prototype->signature; |
Kenneth Graunke | 826a39c | 2010-08-20 02:04:52 -0700 | [diff] [blame] | 3114 | if (signature == NULL) |
| 3115 | return NULL; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3116 | |
Ian Romanick | 41ec6a4 | 2010-03-19 17:08:05 -0700 | [diff] [blame] | 3117 | assert(state->current_function == NULL); |
| 3118 | state->current_function = signature; |
Kenneth Graunke | 6de8256 | 2010-06-29 09:59:40 -0700 | [diff] [blame] | 3119 | state->found_return = false; |
Ian Romanick | 41ec6a4 | 2010-03-19 17:08:05 -0700 | [diff] [blame] | 3120 | |
Ian Romanick | e29a585 | 2010-03-31 17:54:26 -0700 | [diff] [blame] | 3121 | /* Duplicate parameters declared in the prototype as concrete variables. |
| 3122 | * Add these to the symbol table. |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3123 | */ |
Ian Romanick | 8bde4ce | 2010-03-19 11:57:24 -0700 | [diff] [blame] | 3124 | state->symbols->push_scope(); |
Ian Romanick | e29a585 | 2010-03-31 17:54:26 -0700 | [diff] [blame] | 3125 | foreach_iter(exec_list_iterator, iter, signature->parameters) { |
Eric Anholt | fbc7c0b | 2010-04-07 14:32:53 -0700 | [diff] [blame] | 3126 | ir_variable *const var = ((ir_instruction *) iter.get())->as_variable(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3127 | |
Eric Anholt | fbc7c0b | 2010-04-07 14:32:53 -0700 | [diff] [blame] | 3128 | assert(var != NULL); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3129 | |
Ian Romanick | 3359e58 | 2010-03-19 15:38:52 -0700 | [diff] [blame] | 3130 | /* The only way a parameter would "exist" is if two parameters have |
| 3131 | * the same name. |
| 3132 | */ |
| 3133 | if (state->symbols->name_declared_this_scope(var->name)) { |
| 3134 | YYLTYPE loc = this->get_location(); |
| 3135 | |
| 3136 | _mesa_glsl_error(& loc, state, "parameter `%s' redeclared", var->name); |
| 3137 | } else { |
Eric Anholt | 001eee5 | 2010-11-05 06:11:24 -0700 | [diff] [blame] | 3138 | state->symbols->add_variable(var); |
Ian Romanick | 3359e58 | 2010-03-19 15:38:52 -0700 | [diff] [blame] | 3139 | } |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3140 | } |
| 3141 | |
Kenneth Graunke | 9fa99f3 | 2010-04-21 12:30:22 -0700 | [diff] [blame] | 3142 | /* Convert the body of the function to HIR. */ |
Eric Anholt | 894ea97 | 2010-04-07 13:19:11 -0700 | [diff] [blame] | 3143 | this->body->hir(&signature->body, state); |
Kenneth Graunke | 9fa99f3 | 2010-04-21 12:30:22 -0700 | [diff] [blame] | 3144 | signature->is_defined = true; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3145 | |
Ian Romanick | 8bde4ce | 2010-03-19 11:57:24 -0700 | [diff] [blame] | 3146 | state->symbols->pop_scope(); |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3147 | |
Ian Romanick | 41ec6a4 | 2010-03-19 17:08:05 -0700 | [diff] [blame] | 3148 | assert(state->current_function == signature); |
| 3149 | state->current_function = NULL; |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3150 | |
Kenneth Graunke | 6de8256 | 2010-06-29 09:59:40 -0700 | [diff] [blame] | 3151 | if (!signature->return_type->is_void() && !state->found_return) { |
| 3152 | YYLTYPE loc = this->get_location(); |
| 3153 | _mesa_glsl_error(& loc, state, "function `%s' has non-void return type " |
| 3154 | "%s, but no return statement", |
| 3155 | signature->function_name(), |
| 3156 | signature->return_type->name); |
| 3157 | } |
| 3158 | |
Ian Romanick | a87ac25 | 2010-02-22 13:19:34 -0800 | [diff] [blame] | 3159 | /* Function definitions do not have r-values. |
| 3160 | */ |
| 3161 | return NULL; |
| 3162 | } |
Ian Romanick | 16a246c | 2010-03-19 16:45:19 -0700 | [diff] [blame] | 3163 | |
| 3164 | |
Kenneth Graunke | fb9fb5f | 2010-03-26 00:25:36 -0700 | [diff] [blame] | 3165 | ir_rvalue * |
Ian Romanick | 16a246c | 2010-03-19 16:45:19 -0700 | [diff] [blame] | 3166 | ast_jump_statement::hir(exec_list *instructions, |
| 3167 | struct _mesa_glsl_parse_state *state) |
| 3168 | { |
Kenneth Graunke | 953ff12 | 2010-06-25 13:14:37 -0700 | [diff] [blame] | 3169 | void *ctx = state; |
Ian Romanick | 16a246c | 2010-03-19 16:45:19 -0700 | [diff] [blame] | 3170 | |
Ian Romanick | c0e76d8 | 2010-04-05 16:53:19 -0700 | [diff] [blame] | 3171 | switch (mode) { |
| 3172 | case ast_return: { |
Ian Romanick | 16a246c | 2010-03-19 16:45:19 -0700 | [diff] [blame] | 3173 | ir_return *inst; |
Eric Anholt | aad7c77 | 2010-03-30 23:28:20 -1000 | [diff] [blame] | 3174 | assert(state->current_function); |
Ian Romanick | 16a246c | 2010-03-19 16:45:19 -0700 | [diff] [blame] | 3175 | |
| 3176 | if (opt_return_value) { |
Chad Versace | b4cdba6 | 2010-11-17 10:28:01 -0800 | [diff] [blame] | 3177 | ir_rvalue *const ret = opt_return_value->hir(instructions, state); |
Ian Romanick | 2db46fe | 2011-01-22 17:47:05 -0800 | [diff] [blame] | 3178 | |
| 3179 | /* The value of the return type can be NULL if the shader says |
| 3180 | * 'return foo();' and foo() is a function that returns void. |
| 3181 | * |
| 3182 | * NOTE: The GLSL spec doesn't say that this is an error. The type |
| 3183 | * of the return value is void. If the return type of the function is |
| 3184 | * also void, then this should compile without error. Seriously. |
| 3185 | */ |
| 3186 | const glsl_type *const ret_type = |
| 3187 | (ret == NULL) ? glsl_type::void_type : ret->type; |
Ian Romanick | 16a246c | 2010-03-19 16:45:19 -0700 | [diff] [blame] | 3188 | |
Kenneth Graunke | 18707eb | 2010-06-28 23:38:04 -0700 | [diff] [blame] | 3189 | /* Implicit conversions are not allowed for return values. */ |
Ian Romanick | 2db46fe | 2011-01-22 17:47:05 -0800 | [diff] [blame] | 3190 | if (state->current_function->return_type != ret_type) { |
Kenneth Graunke | 18707eb | 2010-06-28 23:38:04 -0700 | [diff] [blame] | 3191 | YYLTYPE loc = this->get_location(); |
| 3192 | |
| 3193 | _mesa_glsl_error(& loc, state, |
| 3194 | "`return' with wrong type %s, in function `%s' " |
| 3195 | "returning %s", |
Ian Romanick | 2db46fe | 2011-01-22 17:47:05 -0800 | [diff] [blame] | 3196 | ret_type->name, |
Kenneth Graunke | 18707eb | 2010-06-28 23:38:04 -0700 | [diff] [blame] | 3197 | state->current_function->function_name(), |
| 3198 | state->current_function->return_type->name); |
| 3199 | } |
Ian Romanick | 16a246c | 2010-03-19 16:45:19 -0700 | [diff] [blame] | 3200 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 3201 | inst = new(ctx) ir_return(ret); |
Ian Romanick | 16a246c | 2010-03-19 16:45:19 -0700 | [diff] [blame] | 3202 | } else { |
Eric Anholt | aad7c77 | 2010-03-30 23:28:20 -1000 | [diff] [blame] | 3203 | if (state->current_function->return_type->base_type != |
| 3204 | GLSL_TYPE_VOID) { |
| 3205 | YYLTYPE loc = this->get_location(); |
| 3206 | |
| 3207 | _mesa_glsl_error(& loc, state, |
| 3208 | "`return' with no value, in function %s returning " |
| 3209 | "non-void", |
Kenneth Graunke | f96c52b | 2010-04-21 15:17:26 -0700 | [diff] [blame] | 3210 | state->current_function->function_name()); |
Eric Anholt | aad7c77 | 2010-03-30 23:28:20 -1000 | [diff] [blame] | 3211 | } |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 3212 | inst = new(ctx) ir_return; |
Ian Romanick | 16a246c | 2010-03-19 16:45:19 -0700 | [diff] [blame] | 3213 | } |
| 3214 | |
Kenneth Graunke | 6de8256 | 2010-06-29 09:59:40 -0700 | [diff] [blame] | 3215 | state->found_return = true; |
Ian Romanick | 16a246c | 2010-03-19 16:45:19 -0700 | [diff] [blame] | 3216 | instructions->push_tail(inst); |
Ian Romanick | c0e76d8 | 2010-04-05 16:53:19 -0700 | [diff] [blame] | 3217 | break; |
Ian Romanick | 16a246c | 2010-03-19 16:45:19 -0700 | [diff] [blame] | 3218 | } |
| 3219 | |
Ian Romanick | c0e76d8 | 2010-04-05 16:53:19 -0700 | [diff] [blame] | 3220 | case ast_discard: |
Eric Anholt | b980207 | 2010-03-30 23:40:14 -1000 | [diff] [blame] | 3221 | if (state->target != fragment_shader) { |
| 3222 | YYLTYPE loc = this->get_location(); |
| 3223 | |
| 3224 | _mesa_glsl_error(& loc, state, |
| 3225 | "`discard' may only appear in a fragment shader"); |
| 3226 | } |
Kenneth Graunke | 77049a7 | 2010-06-30 14:11:00 -0700 | [diff] [blame] | 3227 | instructions->push_tail(new(ctx) ir_discard); |
Ian Romanick | c0e76d8 | 2010-04-05 16:53:19 -0700 | [diff] [blame] | 3228 | break; |
| 3229 | |
| 3230 | case ast_break: |
| 3231 | case ast_continue: |
Ian Romanick | 4cf20cd | 2010-04-05 17:13:47 -0700 | [diff] [blame] | 3232 | /* FINISHME: Handle switch-statements. They cannot contain 'continue', |
| 3233 | * FINISHME: and they use a different IR instruction for 'break'. |
| 3234 | */ |
| 3235 | /* FINISHME: Correctly handle the nesting. If a switch-statement is |
| 3236 | * FINISHME: inside a loop, a 'continue' is valid and will bind to the |
| 3237 | * FINISHME: loop. |
| 3238 | */ |
| 3239 | if (state->loop_or_switch_nesting == NULL) { |
| 3240 | YYLTYPE loc = this->get_location(); |
| 3241 | |
| 3242 | _mesa_glsl_error(& loc, state, |
| 3243 | "`%s' may only appear in a loop", |
| 3244 | (mode == ast_break) ? "break" : "continue"); |
| 3245 | } else { |
| 3246 | ir_loop *const loop = state->loop_or_switch_nesting->as_loop(); |
| 3247 | |
Eric Anholt | 2d1ed7b | 2010-07-22 12:55:16 -0700 | [diff] [blame] | 3248 | /* Inline the for loop expression again, since we don't know |
| 3249 | * where near the end of the loop body the normal copy of it |
| 3250 | * is going to be placed. |
| 3251 | */ |
| 3252 | if (mode == ast_continue && |
| 3253 | state->loop_or_switch_nesting_ast->rest_expression) { |
| 3254 | state->loop_or_switch_nesting_ast->rest_expression->hir(instructions, |
| 3255 | state); |
| 3256 | } |
| 3257 | |
Ian Romanick | 4cf20cd | 2010-04-05 17:13:47 -0700 | [diff] [blame] | 3258 | if (loop != NULL) { |
| 3259 | ir_loop_jump *const jump = |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 3260 | new(ctx) ir_loop_jump((mode == ast_break) |
| 3261 | ? ir_loop_jump::jump_break |
| 3262 | : ir_loop_jump::jump_continue); |
Ian Romanick | 4cf20cd | 2010-04-05 17:13:47 -0700 | [diff] [blame] | 3263 | instructions->push_tail(jump); |
| 3264 | } |
| 3265 | } |
| 3266 | |
Ian Romanick | c0e76d8 | 2010-04-05 16:53:19 -0700 | [diff] [blame] | 3267 | break; |
Eric Anholt | b980207 | 2010-03-30 23:40:14 -1000 | [diff] [blame] | 3268 | } |
| 3269 | |
Ian Romanick | 16a246c | 2010-03-19 16:45:19 -0700 | [diff] [blame] | 3270 | /* Jump instructions do not have r-values. |
| 3271 | */ |
| 3272 | return NULL; |
| 3273 | } |
Ian Romanick | 3c6fea3 | 2010-03-29 14:11:25 -0700 | [diff] [blame] | 3274 | |
| 3275 | |
| 3276 | ir_rvalue * |
| 3277 | ast_selection_statement::hir(exec_list *instructions, |
| 3278 | struct _mesa_glsl_parse_state *state) |
| 3279 | { |
Kenneth Graunke | 953ff12 | 2010-06-25 13:14:37 -0700 | [diff] [blame] | 3280 | void *ctx = state; |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 3281 | |
Ian Romanick | 3c6fea3 | 2010-03-29 14:11:25 -0700 | [diff] [blame] | 3282 | ir_rvalue *const condition = this->condition->hir(instructions, state); |
Ian Romanick | 3c6fea3 | 2010-03-29 14:11:25 -0700 | [diff] [blame] | 3283 | |
| 3284 | /* From page 66 (page 72 of the PDF) of the GLSL 1.50 spec: |
| 3285 | * |
| 3286 | * "Any expression whose type evaluates to a Boolean can be used as the |
| 3287 | * conditional expression bool-expression. Vector types are not accepted |
| 3288 | * as the expression to if." |
| 3289 | * |
| 3290 | * The checks are separated so that higher quality diagnostics can be |
| 3291 | * generated for cases where both rules are violated. |
| 3292 | */ |
| 3293 | if (!condition->type->is_boolean() || !condition->type->is_scalar()) { |
| 3294 | YYLTYPE loc = this->condition->get_location(); |
| 3295 | |
| 3296 | _mesa_glsl_error(& loc, state, "if-statement condition must be scalar " |
| 3297 | "boolean"); |
| 3298 | } |
| 3299 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 3300 | ir_if *const stmt = new(ctx) ir_if(condition); |
Ian Romanick | 3c6fea3 | 2010-03-29 14:11:25 -0700 | [diff] [blame] | 3301 | |
Kenneth Graunke | 665d75c | 2010-08-18 13:54:50 -0700 | [diff] [blame] | 3302 | if (then_statement != NULL) { |
| 3303 | state->symbols->push_scope(); |
Ian Romanick | 4f9d72f | 2010-05-10 11:10:26 -0700 | [diff] [blame] | 3304 | then_statement->hir(& stmt->then_instructions, state); |
Kenneth Graunke | 665d75c | 2010-08-18 13:54:50 -0700 | [diff] [blame] | 3305 | state->symbols->pop_scope(); |
| 3306 | } |
Ian Romanick | 3c6fea3 | 2010-03-29 14:11:25 -0700 | [diff] [blame] | 3307 | |
Kenneth Graunke | 665d75c | 2010-08-18 13:54:50 -0700 | [diff] [blame] | 3308 | if (else_statement != NULL) { |
| 3309 | state->symbols->push_scope(); |
Ian Romanick | 4f9d72f | 2010-05-10 11:10:26 -0700 | [diff] [blame] | 3310 | else_statement->hir(& stmt->else_instructions, state); |
Kenneth Graunke | 665d75c | 2010-08-18 13:54:50 -0700 | [diff] [blame] | 3311 | state->symbols->pop_scope(); |
| 3312 | } |
Ian Romanick | 3c6fea3 | 2010-03-29 14:11:25 -0700 | [diff] [blame] | 3313 | |
| 3314 | instructions->push_tail(stmt); |
| 3315 | |
| 3316 | /* if-statements do not have r-values. |
| 3317 | */ |
| 3318 | return NULL; |
| 3319 | } |
Ian Romanick | 9e7d010 | 2010-04-05 16:37:49 -0700 | [diff] [blame] | 3320 | |
| 3321 | |
Ian Romanick | 8c46ed2 | 2010-04-05 18:07:27 -0700 | [diff] [blame] | 3322 | void |
| 3323 | ast_iteration_statement::condition_to_hir(ir_loop *stmt, |
| 3324 | struct _mesa_glsl_parse_state *state) |
Ian Romanick | 9e7d010 | 2010-04-05 16:37:49 -0700 | [diff] [blame] | 3325 | { |
Kenneth Graunke | 953ff12 | 2010-06-25 13:14:37 -0700 | [diff] [blame] | 3326 | void *ctx = state; |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 3327 | |
Ian Romanick | 9e7d010 | 2010-04-05 16:37:49 -0700 | [diff] [blame] | 3328 | if (condition != NULL) { |
| 3329 | ir_rvalue *const cond = |
| 3330 | condition->hir(& stmt->body_instructions, state); |
| 3331 | |
| 3332 | if ((cond == NULL) |
| 3333 | || !cond->type->is_boolean() || !cond->type->is_scalar()) { |
| 3334 | YYLTYPE loc = condition->get_location(); |
| 3335 | |
| 3336 | _mesa_glsl_error(& loc, state, |
| 3337 | "loop condition must be scalar boolean"); |
| 3338 | } else { |
| 3339 | /* As the first code in the loop body, generate a block that looks |
| 3340 | * like 'if (!condition) break;' as the loop termination condition. |
| 3341 | */ |
| 3342 | ir_rvalue *const not_cond = |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 3343 | new(ctx) ir_expression(ir_unop_logic_not, glsl_type::bool_type, cond, |
| 3344 | NULL); |
Ian Romanick | 9e7d010 | 2010-04-05 16:37:49 -0700 | [diff] [blame] | 3345 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 3346 | ir_if *const if_stmt = new(ctx) ir_if(not_cond); |
Ian Romanick | 9e7d010 | 2010-04-05 16:37:49 -0700 | [diff] [blame] | 3347 | |
| 3348 | ir_jump *const break_stmt = |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 3349 | new(ctx) ir_loop_jump(ir_loop_jump::jump_break); |
Ian Romanick | 9e7d010 | 2010-04-05 16:37:49 -0700 | [diff] [blame] | 3350 | |
| 3351 | if_stmt->then_instructions.push_tail(break_stmt); |
| 3352 | stmt->body_instructions.push_tail(if_stmt); |
| 3353 | } |
| 3354 | } |
Ian Romanick | 8c46ed2 | 2010-04-05 18:07:27 -0700 | [diff] [blame] | 3355 | } |
| 3356 | |
| 3357 | |
| 3358 | ir_rvalue * |
| 3359 | ast_iteration_statement::hir(exec_list *instructions, |
| 3360 | struct _mesa_glsl_parse_state *state) |
| 3361 | { |
Kenneth Graunke | 953ff12 | 2010-06-25 13:14:37 -0700 | [diff] [blame] | 3362 | void *ctx = state; |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 3363 | |
Ian Romanick | 4846066 | 2010-04-16 16:42:43 -0700 | [diff] [blame] | 3364 | /* For-loops and while-loops start a new scope, but do-while loops do not. |
Ian Romanick | 8c46ed2 | 2010-04-05 18:07:27 -0700 | [diff] [blame] | 3365 | */ |
Ian Romanick | 4846066 | 2010-04-16 16:42:43 -0700 | [diff] [blame] | 3366 | if (mode != ast_do_while) |
Ian Romanick | 8c46ed2 | 2010-04-05 18:07:27 -0700 | [diff] [blame] | 3367 | state->symbols->push_scope(); |
| 3368 | |
| 3369 | if (init_statement != NULL) |
| 3370 | init_statement->hir(instructions, state); |
| 3371 | |
Carl Worth | 1660a29 | 2010-06-23 18:11:51 -0700 | [diff] [blame] | 3372 | ir_loop *const stmt = new(ctx) ir_loop(); |
Ian Romanick | 8c46ed2 | 2010-04-05 18:07:27 -0700 | [diff] [blame] | 3373 | instructions->push_tail(stmt); |
| 3374 | |
| 3375 | /* Track the current loop and / or switch-statement nesting. |
| 3376 | */ |
| 3377 | ir_instruction *const nesting = state->loop_or_switch_nesting; |
Eric Anholt | 2d1ed7b | 2010-07-22 12:55:16 -0700 | [diff] [blame] | 3378 | ast_iteration_statement *nesting_ast = state->loop_or_switch_nesting_ast; |
| 3379 | |
Ian Romanick | 8c46ed2 | 2010-04-05 18:07:27 -0700 | [diff] [blame] | 3380 | state->loop_or_switch_nesting = stmt; |
Eric Anholt | 2d1ed7b | 2010-07-22 12:55:16 -0700 | [diff] [blame] | 3381 | state->loop_or_switch_nesting_ast = this; |
Ian Romanick | 8c46ed2 | 2010-04-05 18:07:27 -0700 | [diff] [blame] | 3382 | |
| 3383 | if (mode != ast_do_while) |
| 3384 | condition_to_hir(stmt, state); |
Ian Romanick | 9e7d010 | 2010-04-05 16:37:49 -0700 | [diff] [blame] | 3385 | |
Ian Romanick | 4f9d72f | 2010-05-10 11:10:26 -0700 | [diff] [blame] | 3386 | if (body != NULL) |
| 3387 | body->hir(& stmt->body_instructions, state); |
Ian Romanick | 9e7d010 | 2010-04-05 16:37:49 -0700 | [diff] [blame] | 3388 | |
| 3389 | if (rest_expression != NULL) |
| 3390 | rest_expression->hir(& stmt->body_instructions, state); |
| 3391 | |
Ian Romanick | 8c46ed2 | 2010-04-05 18:07:27 -0700 | [diff] [blame] | 3392 | if (mode == ast_do_while) |
| 3393 | condition_to_hir(stmt, state); |
| 3394 | |
Ian Romanick | 4846066 | 2010-04-16 16:42:43 -0700 | [diff] [blame] | 3395 | if (mode != ast_do_while) |
Ian Romanick | 9e7d010 | 2010-04-05 16:37:49 -0700 | [diff] [blame] | 3396 | state->symbols->pop_scope(); |
| 3397 | |
Ian Romanick | e9d0f26 | 2010-04-05 17:01:53 -0700 | [diff] [blame] | 3398 | /* Restore previous nesting before returning. |
| 3399 | */ |
| 3400 | state->loop_or_switch_nesting = nesting; |
Eric Anholt | 2d1ed7b | 2010-07-22 12:55:16 -0700 | [diff] [blame] | 3401 | state->loop_or_switch_nesting_ast = nesting_ast; |
Ian Romanick | e9d0f26 | 2010-04-05 17:01:53 -0700 | [diff] [blame] | 3402 | |
Ian Romanick | 9e7d010 | 2010-04-05 16:37:49 -0700 | [diff] [blame] | 3403 | /* Loops do not have r-values. |
| 3404 | */ |
| 3405 | return NULL; |
| 3406 | } |
Ian Romanick | 3455ce6 | 2010-04-19 15:13:15 -0700 | [diff] [blame] | 3407 | |
| 3408 | |
| 3409 | ir_rvalue * |
| 3410 | ast_type_specifier::hir(exec_list *instructions, |
| 3411 | struct _mesa_glsl_parse_state *state) |
| 3412 | { |
Chad Versace | 08a286c | 2011-01-16 21:44:57 -0800 | [diff] [blame] | 3413 | if (!this->is_precision_statement && this->structure == NULL) |
| 3414 | return NULL; |
| 3415 | |
| 3416 | YYLTYPE loc = this->get_location(); |
| 3417 | |
| 3418 | if (this->precision != ast_precision_none |
| 3419 | && state->language_version != 100 |
| 3420 | && state->language_version < 130) { |
| 3421 | _mesa_glsl_error(&loc, state, |
| 3422 | "precision qualifiers exist only in " |
| 3423 | "GLSL ES 1.00, and GLSL 1.30 and later"); |
| 3424 | return NULL; |
| 3425 | } |
| 3426 | if (this->precision != ast_precision_none |
| 3427 | && this->structure != NULL) { |
| 3428 | _mesa_glsl_error(&loc, state, |
| 3429 | "precision qualifiers do not apply to structures"); |
| 3430 | return NULL; |
| 3431 | } |
| 3432 | |
| 3433 | /* If this is a precision statement, check that the type to which it is |
| 3434 | * applied is either float or int. |
| 3435 | * |
| 3436 | * From section 4.5.3 of the GLSL 1.30 spec: |
| 3437 | * "The precision statement |
| 3438 | * precision precision-qualifier type; |
| 3439 | * can be used to establish a default precision qualifier. The type |
| 3440 | * field can be either int or float [...]. Any other types or |
| 3441 | * qualifiers will result in an error. |
| 3442 | */ |
| 3443 | if (this->is_precision_statement) { |
| 3444 | assert(this->precision != ast_precision_none); |
| 3445 | assert(this->structure == NULL); /* The check for structures was |
| 3446 | * performed above. */ |
| 3447 | if (this->is_array) { |
| 3448 | _mesa_glsl_error(&loc, state, |
| 3449 | "default precision statements do not apply to " |
| 3450 | "arrays"); |
| 3451 | return NULL; |
| 3452 | } |
| 3453 | if (this->type_specifier != ast_float |
| 3454 | && this->type_specifier != ast_int) { |
| 3455 | _mesa_glsl_error(&loc, state, |
| 3456 | "default precision statements apply only to types " |
| 3457 | "float and int"); |
| 3458 | return NULL; |
| 3459 | } |
| 3460 | |
| 3461 | /* FINISHME: Translate precision statements into IR. */ |
| 3462 | return NULL; |
| 3463 | } |
| 3464 | |
Ian Romanick | 3455ce6 | 2010-04-19 15:13:15 -0700 | [diff] [blame] | 3465 | if (this->structure != NULL) |
| 3466 | return this->structure->hir(instructions, state); |
Ian Romanick | 85ba37b | 2010-04-21 14:33:34 -0700 | [diff] [blame] | 3467 | |
| 3468 | return NULL; |
Ian Romanick | 3455ce6 | 2010-04-19 15:13:15 -0700 | [diff] [blame] | 3469 | } |
| 3470 | |
| 3471 | |
| 3472 | ir_rvalue * |
| 3473 | ast_struct_specifier::hir(exec_list *instructions, |
| 3474 | struct _mesa_glsl_parse_state *state) |
| 3475 | { |
Ian Romanick | 3455ce6 | 2010-04-19 15:13:15 -0700 | [diff] [blame] | 3476 | unsigned decl_count = 0; |
| 3477 | |
| 3478 | /* Make an initial pass over the list of structure fields to determine how |
| 3479 | * many there are. Each element in this list is an ast_declarator_list. |
| 3480 | * This means that we actually need to count the number of elements in the |
| 3481 | * 'declarations' list in each of the elements. |
| 3482 | */ |
Ian Romanick | 2b97dc6 | 2010-05-10 17:42:05 -0700 | [diff] [blame] | 3483 | foreach_list_typed (ast_declarator_list, decl_list, link, |
| 3484 | &this->declarations) { |
Ian Romanick | 304ea90 | 2010-05-10 11:17:53 -0700 | [diff] [blame] | 3485 | foreach_list_const (decl_ptr, & decl_list->declarations) { |
Ian Romanick | 3455ce6 | 2010-04-19 15:13:15 -0700 | [diff] [blame] | 3486 | decl_count++; |
| 3487 | } |
| 3488 | } |
| 3489 | |
Ian Romanick | 3455ce6 | 2010-04-19 15:13:15 -0700 | [diff] [blame] | 3490 | /* Allocate storage for the structure fields and process the field |
| 3491 | * declarations. As the declarations are processed, try to also convert |
| 3492 | * the types to HIR. This ensures that structure definitions embedded in |
| 3493 | * other structure definitions are processed. |
| 3494 | */ |
Kenneth Graunke | d3073f5 | 2011-01-21 14:32:31 -0800 | [diff] [blame] | 3495 | glsl_struct_field *const fields = ralloc_array(state, glsl_struct_field, |
Eric Anholt | 21b0dbd | 2010-07-20 16:47:25 -0700 | [diff] [blame] | 3496 | decl_count); |
Ian Romanick | 3455ce6 | 2010-04-19 15:13:15 -0700 | [diff] [blame] | 3497 | |
| 3498 | unsigned i = 0; |
Ian Romanick | 2b97dc6 | 2010-05-10 17:42:05 -0700 | [diff] [blame] | 3499 | foreach_list_typed (ast_declarator_list, decl_list, link, |
| 3500 | &this->declarations) { |
Ian Romanick | 3455ce6 | 2010-04-19 15:13:15 -0700 | [diff] [blame] | 3501 | const char *type_name; |
| 3502 | |
| 3503 | decl_list->type->specifier->hir(instructions, state); |
| 3504 | |
Kenneth Graunke | c98deb1 | 2010-08-16 14:02:25 -0700 | [diff] [blame] | 3505 | /* Section 10.9 of the GLSL ES 1.00 specification states that |
| 3506 | * embedded structure definitions have been removed from the language. |
| 3507 | */ |
| 3508 | if (state->es_shader && decl_list->type->specifier->structure != NULL) { |
| 3509 | YYLTYPE loc = this->get_location(); |
| 3510 | _mesa_glsl_error(&loc, state, "Embedded structure definitions are " |
| 3511 | "not allowed in GLSL ES 1.00."); |
| 3512 | } |
| 3513 | |
Ian Romanick | 3455ce6 | 2010-04-19 15:13:15 -0700 | [diff] [blame] | 3514 | const glsl_type *decl_type = |
| 3515 | decl_list->type->specifier->glsl_type(& type_name, state); |
| 3516 | |
Ian Romanick | 2b97dc6 | 2010-05-10 17:42:05 -0700 | [diff] [blame] | 3517 | foreach_list_typed (ast_declaration, decl, link, |
| 3518 | &decl_list->declarations) { |
Kenneth Graunke | d8e34e2 | 2010-08-07 02:56:01 -0700 | [diff] [blame] | 3519 | const struct glsl_type *field_type = decl_type; |
| 3520 | if (decl->is_array) { |
| 3521 | YYLTYPE loc = decl->get_location(); |
| 3522 | field_type = process_array_type(&loc, decl_type, decl->array_size, |
| 3523 | state); |
| 3524 | } |
Ian Romanick | 73986a7 | 2010-04-20 16:49:03 -0700 | [diff] [blame] | 3525 | fields[i].type = (field_type != NULL) |
| 3526 | ? field_type : glsl_type::error_type; |
Ian Romanick | 3455ce6 | 2010-04-19 15:13:15 -0700 | [diff] [blame] | 3527 | fields[i].name = decl->identifier; |
| 3528 | i++; |
| 3529 | } |
| 3530 | } |
| 3531 | |
| 3532 | assert(i == decl_count); |
| 3533 | |
Ian Romanick | 49e3577 | 2010-06-28 11:54:57 -0700 | [diff] [blame] | 3534 | const glsl_type *t = |
Kenneth Graunke | ca92ae2 | 2010-09-18 11:11:09 +0200 | [diff] [blame] | 3535 | glsl_type::get_record_instance(fields, decl_count, this->name); |
Ian Romanick | 1d28b61 | 2010-04-20 16:48:24 -0700 | [diff] [blame] | 3536 | |
Ian Romanick | ab89927 | 2010-04-23 13:24:08 -0700 | [diff] [blame] | 3537 | YYLTYPE loc = this->get_location(); |
Ian Romanick | a789ca6 | 2010-09-01 14:08:08 -0700 | [diff] [blame] | 3538 | if (!state->symbols->add_type(name, t)) { |
Ian Romanick | ab89927 | 2010-04-23 13:24:08 -0700 | [diff] [blame] | 3539 | _mesa_glsl_error(& loc, state, "struct `%s' previously defined", name); |
| 3540 | } else { |
Kenneth Graunke | eb63934 | 2011-02-27 01:17:29 -0800 | [diff] [blame] | 3541 | const glsl_type **s = reralloc(state, state->user_structures, |
| 3542 | const glsl_type *, |
| 3543 | state->num_user_structures + 1); |
Ian Romanick | a2c6df5 | 2010-04-28 13:14:53 -0700 | [diff] [blame] | 3544 | if (s != NULL) { |
| 3545 | s[state->num_user_structures] = t; |
| 3546 | state->user_structures = s; |
| 3547 | state->num_user_structures++; |
| 3548 | } |
Ian Romanick | ab89927 | 2010-04-23 13:24:08 -0700 | [diff] [blame] | 3549 | } |
Ian Romanick | 3455ce6 | 2010-04-19 15:13:15 -0700 | [diff] [blame] | 3550 | |
| 3551 | /* Structure type definitions do not have r-values. |
| 3552 | */ |
| 3553 | return NULL; |
| 3554 | } |