diff options
Diffstat (limited to 'src/compiler/glsl/linker.cpp')
| -rw-r--r-- | src/compiler/glsl/linker.cpp | 413 |
1 files changed, 207 insertions, 206 deletions
diff --git a/src/compiler/glsl/linker.cpp b/src/compiler/glsl/linker.cpp index 3bcb907f9b1..90d7831cde0 100644 --- a/src/compiler/glsl/linker.cpp +++ b/src/compiler/glsl/linker.cpp @@ -974,236 +974,225 @@ validate_intrastage_arrays(struct gl_shader_program *prog, */ void cross_validate_globals(struct gl_shader_program *prog, - struct gl_shader **shader_list, - unsigned num_shaders, - bool uniforms_only) + struct exec_list *ir, glsl_symbol_table *variables, + bool uniforms_only) { - /* Examine all of the uniforms in all of the shaders and cross validate - * them. - */ - glsl_symbol_table variables; - for (unsigned i = 0; i < num_shaders; i++) { - if (shader_list[i] == NULL) - continue; - - foreach_in_list(ir_instruction, node, shader_list[i]->ir) { - ir_variable *const var = node->as_variable(); + foreach_in_list(ir_instruction, node, ir) { + ir_variable *const var = node->as_variable(); - if (var == NULL) - continue; + if (var == NULL) + continue; - if (uniforms_only && (var->data.mode != ir_var_uniform && var->data.mode != ir_var_shader_storage)) - continue; + if (uniforms_only && (var->data.mode != ir_var_uniform && var->data.mode != ir_var_shader_storage)) + continue; - /* don't cross validate subroutine uniforms */ - if (var->type->contains_subroutine()) - continue; + /* don't cross validate subroutine uniforms */ + if (var->type->contains_subroutine()) + continue; - /* Don't cross validate temporaries that are at global scope. These - * will eventually get pulled into the shaders 'main'. - */ - if (var->data.mode == ir_var_temporary) - continue; + /* Don't cross validate temporaries that are at global scope. These + * will eventually get pulled into the shaders 'main'. + */ + if (var->data.mode == ir_var_temporary) + continue; - /* If a global with this name has already been seen, verify that the - * new instance has the same type. In addition, if the globals have - * initializers, the values of the initializers must be the same. - */ - ir_variable *const existing = variables.get_variable(var->name); - if (existing != NULL) { - /* Check if types match. Interface blocks have some special - * rules so we handle those elsewhere. - */ - if (var->type != existing->type && - !var->is_interface_instance()) { - if (!validate_intrastage_arrays(prog, var, existing)) { - if (var->type->is_record() && existing->type->is_record() - && existing->type->record_compare(var->type)) { - existing->type = var->type; - } else { - /* If it is an unsized array in a Shader Storage Block, - * two different shaders can access to different elements. - * Because of that, they might be converted to different - * sized arrays, then check that they are compatible but - * ignore the array size. - */ - if (!(var->data.mode == ir_var_shader_storage && - var->data.from_ssbo_unsized_array && - existing->data.mode == ir_var_shader_storage && - existing->data.from_ssbo_unsized_array && - var->type->gl_type == existing->type->gl_type)) { - linker_error(prog, "%s `%s' declared as type " - "`%s' and type `%s'\n", - mode_string(var), - var->name, var->type->name, - existing->type->name); - return; - } + /* If a global with this name has already been seen, verify that the + * new instance has the same type. In addition, if the globals have + * initializers, the values of the initializers must be the same. + */ + ir_variable *const existing = variables->get_variable(var->name); + if (existing != NULL) { + /* Check if types match. Interface blocks have some special + * rules so we handle those elsewhere. + */ + if (var->type != existing->type && + !var->is_interface_instance()) { + if (!validate_intrastage_arrays(prog, var, existing)) { + if (var->type->is_record() && existing->type->is_record() + && existing->type->record_compare(var->type)) { + existing->type = var->type; + } else { + /* If it is an unsized array in a Shader Storage Block, + * two different shaders can access to different elements. + * Because of that, they might be converted to different + * sized arrays, then check that they are compatible but + * ignore the array size. + */ + if (!(var->data.mode == ir_var_shader_storage && + var->data.from_ssbo_unsized_array && + existing->data.mode == ir_var_shader_storage && + existing->data.from_ssbo_unsized_array && + var->type->gl_type == existing->type->gl_type)) { + linker_error(prog, "%s `%s' declared as type " + "`%s' and type `%s'\n", + mode_string(var), + var->name, var->type->name, + existing->type->name); + return; } - } - } - - if (var->data.explicit_location) { - if (existing->data.explicit_location - && (var->data.location != existing->data.location)) { - linker_error(prog, "explicit locations for %s " - "`%s' have differing values\n", - mode_string(var), var->name); - return; - } + } + } + } - if (var->data.location_frac != existing->data.location_frac) { - linker_error(prog, "explicit components for %s " - "`%s' have differing values\n", - mode_string(var), var->name); - return; - } + if (var->data.explicit_location) { + if (existing->data.explicit_location + && (var->data.location != existing->data.location)) { + linker_error(prog, "explicit locations for %s " + "`%s' have differing values\n", + mode_string(var), var->name); + return; + } - existing->data.location = var->data.location; - existing->data.explicit_location = true; - } else { - /* Check if uniform with implicit location was marked explicit - * by earlier shader stage. If so, mark it explicit in this stage - * too to make sure later processing does not treat it as - * implicit one. - */ - if (existing->data.explicit_location) { - var->data.location = existing->data.location; - var->data.explicit_location = true; - } + if (var->data.location_frac != existing->data.location_frac) { + linker_error(prog, "explicit components for %s `%s' have " + "differing values\n", mode_string(var), var->name); + return; } - /* From the GLSL 4.20 specification: - * "A link error will result if two compilation units in a program - * specify different integer-constant bindings for the same - * opaque-uniform name. However, it is not an error to specify a - * binding on some but not all declarations for the same name" + existing->data.location = var->data.location; + existing->data.explicit_location = true; + } else { + /* Check if uniform with implicit location was marked explicit + * by earlier shader stage. If so, mark it explicit in this stage + * too to make sure later processing does not treat it as + * implicit one. */ - if (var->data.explicit_binding) { - if (existing->data.explicit_binding && - var->data.binding != existing->data.binding) { - linker_error(prog, "explicit bindings for %s " - "`%s' have differing values\n", - mode_string(var), var->name); - return; - } - - existing->data.binding = var->data.binding; - existing->data.explicit_binding = true; + if (existing->data.explicit_location) { + var->data.location = existing->data.location; + var->data.explicit_location = true; } + } - if (var->type->contains_atomic() && - var->data.offset != existing->data.offset) { - linker_error(prog, "offset specifications for %s " + /* From the GLSL 4.20 specification: + * "A link error will result if two compilation units in a program + * specify different integer-constant bindings for the same + * opaque-uniform name. However, it is not an error to specify a + * binding on some but not all declarations for the same name" + */ + if (var->data.explicit_binding) { + if (existing->data.explicit_binding && + var->data.binding != existing->data.binding) { + linker_error(prog, "explicit bindings for %s " "`%s' have differing values\n", mode_string(var), var->name); return; } - /* Validate layout qualifiers for gl_FragDepth. - * - * From the AMD/ARB_conservative_depth specs: - * - * "If gl_FragDepth is redeclared in any fragment shader in a - * program, it must be redeclared in all fragment shaders in - * that program that have static assignments to - * gl_FragDepth. All redeclarations of gl_FragDepth in all - * fragment shaders in a single program must have the same set - * of qualifiers." - */ - if (strcmp(var->name, "gl_FragDepth") == 0) { - bool layout_declared = var->data.depth_layout != ir_depth_layout_none; - bool layout_differs = - var->data.depth_layout != existing->data.depth_layout; - - if (layout_declared && layout_differs) { - linker_error(prog, - "All redeclarations of gl_FragDepth in all " - "fragment shaders in a single program must have " - "the same set of qualifiers.\n"); - } + existing->data.binding = var->data.binding; + existing->data.explicit_binding = true; + } - if (var->data.used && layout_differs) { - linker_error(prog, - "If gl_FragDepth is redeclared with a layout " - "qualifier in any fragment shader, it must be " - "redeclared with the same layout qualifier in " - "all fragment shaders that have assignments to " - "gl_FragDepth\n"); - } - } + if (var->type->contains_atomic() && + var->data.offset != existing->data.offset) { + linker_error(prog, "offset specifications for %s " + "`%s' have differing values\n", + mode_string(var), var->name); + return; + } - /* Page 35 (page 41 of the PDF) of the GLSL 4.20 spec says: - * - * "If a shared global has multiple initializers, the - * initializers must all be constant expressions, and they - * must all have the same value. Otherwise, a link error will - * result. (A shared global having only one initializer does - * not require that initializer to be a constant expression.)" - * - * Previous to 4.20 the GLSL spec simply said that initializers - * must have the same value. In this case of non-constant - * initializers, this was impossible to determine. As a result, - * no vendor actually implemented that behavior. The 4.20 - * behavior matches the implemented behavior of at least one other - * vendor, so we'll implement that for all GLSL versions. - */ - if (var->constant_initializer != NULL) { - if (existing->constant_initializer != NULL) { - if (!var->constant_initializer->has_value(existing->constant_initializer)) { - linker_error(prog, "initializers for %s " - "`%s' have differing values\n", - mode_string(var), var->name); - return; - } - } else { - /* If the first-seen instance of a particular uniform did - * not have an initializer but a later instance does, - * replace the former with the later. - */ - variables.replace_variable(existing->name, var); - } - } + /* Validate layout qualifiers for gl_FragDepth. + * + * From the AMD/ARB_conservative_depth specs: + * + * "If gl_FragDepth is redeclared in any fragment shader in a + * program, it must be redeclared in all fragment shaders in + * that program that have static assignments to + * gl_FragDepth. All redeclarations of gl_FragDepth in all + * fragment shaders in a single program must have the same set + * of qualifiers." + */ + if (strcmp(var->name, "gl_FragDepth") == 0) { + bool layout_declared = var->data.depth_layout != ir_depth_layout_none; + bool layout_differs = + var->data.depth_layout != existing->data.depth_layout; - if (var->data.has_initializer) { - if (existing->data.has_initializer - && (var->constant_initializer == NULL - || existing->constant_initializer == NULL)) { - linker_error(prog, - "shared global variable `%s' has multiple " - "non-constant initializers.\n", - var->name); - return; - } - } + if (layout_declared && layout_differs) { + linker_error(prog, + "All redeclarations of gl_FragDepth in all " + "fragment shaders in a single program must have " + "the same set of qualifiers.\n"); + } - if (existing->data.invariant != var->data.invariant) { - linker_error(prog, "declarations for %s `%s' have " - "mismatching invariant qualifiers\n", - mode_string(var), var->name); - return; - } - if (existing->data.centroid != var->data.centroid) { - linker_error(prog, "declarations for %s `%s' have " - "mismatching centroid qualifiers\n", - mode_string(var), var->name); - return; + if (var->data.used && layout_differs) { + linker_error(prog, + "If gl_FragDepth is redeclared with a layout " + "qualifier in any fragment shader, it must be " + "redeclared with the same layout qualifier in " + "all fragment shaders that have assignments to " + "gl_FragDepth\n"); } - if (existing->data.sample != var->data.sample) { - linker_error(prog, "declarations for %s `%s` have " - "mismatching sample qualifiers\n", - mode_string(var), var->name); - return; + } + + /* Page 35 (page 41 of the PDF) of the GLSL 4.20 spec says: + * + * "If a shared global has multiple initializers, the + * initializers must all be constant expressions, and they + * must all have the same value. Otherwise, a link error will + * result. (A shared global having only one initializer does + * not require that initializer to be a constant expression.)" + * + * Previous to 4.20 the GLSL spec simply said that initializers + * must have the same value. In this case of non-constant + * initializers, this was impossible to determine. As a result, + * no vendor actually implemented that behavior. The 4.20 + * behavior matches the implemented behavior of at least one other + * vendor, so we'll implement that for all GLSL versions. + */ + if (var->constant_initializer != NULL) { + if (existing->constant_initializer != NULL) { + if (!var->constant_initializer->has_value(existing->constant_initializer)) { + linker_error(prog, "initializers for %s " + "`%s' have differing values\n", + mode_string(var), var->name); + return; + } + } else { + /* If the first-seen instance of a particular uniform did + * not have an initializer but a later instance does, + * replace the former with the later. + */ + variables->replace_variable(existing->name, var); } - if (existing->data.image_format != var->data.image_format) { - linker_error(prog, "declarations for %s `%s` have " - "mismatching image format qualifiers\n", - mode_string(var), var->name); + } + + if (var->data.has_initializer) { + if (existing->data.has_initializer + && (var->constant_initializer == NULL + || existing->constant_initializer == NULL)) { + linker_error(prog, + "shared global variable `%s' has multiple " + "non-constant initializers.\n", + var->name); return; } - } else - variables.add_variable(var); - } + } + + if (existing->data.invariant != var->data.invariant) { + linker_error(prog, "declarations for %s `%s' have " + "mismatching invariant qualifiers\n", + mode_string(var), var->name); + return; + } + if (existing->data.centroid != var->data.centroid) { + linker_error(prog, "declarations for %s `%s' have " + "mismatching centroid qualifiers\n", + mode_string(var), var->name); + return; + } + if (existing->data.sample != var->data.sample) { + linker_error(prog, "declarations for %s `%s` have " + "mismatching sample qualifiers\n", + mode_string(var), var->name); + return; + } + if (existing->data.image_format != var->data.image_format) { + linker_error(prog, "declarations for %s `%s` have " + "mismatching image format qualifiers\n", + mode_string(var), var->name); + return; + } + } else + variables->add_variable(var); } } @@ -1214,8 +1203,14 @@ cross_validate_globals(struct gl_shader_program *prog, void cross_validate_uniforms(struct gl_shader_program *prog) { - cross_validate_globals(prog, prog->_LinkedShaders, - MESA_SHADER_STAGES, true); + glsl_symbol_table variables; + for (unsigned i = 0; i < MESA_SHADER_STAGES; i++) { + if (prog->_LinkedShaders[i] == NULL) + continue; + + cross_validate_globals(prog, prog->_LinkedShaders[i]->ir, &variables, + true); + } } /** @@ -2157,7 +2152,13 @@ link_intrastage_shaders(void *mem_ctx, /* Check that global variables defined in multiple shaders are consistent. */ - cross_validate_globals(prog, shader_list, num_shaders, false); + glsl_symbol_table variables; + for (unsigned i = 0; i < num_shaders; i++) { + if (shader_list[i] == NULL) + continue; + cross_validate_globals(prog, shader_list[i]->ir, &variables, false); + } + if (!prog->LinkStatus) return NULL; |