// Copyright 2022 The Dawn & Tint Authors // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are met: // // 1. Redistributions of source code must retain the above copyright notice, this // list of conditions and the following disclaimer. // // 2. Redistributions in binary form must reproduce the above copyright notice, // this list of conditions and the following disclaimer in the documentation // and/or other materials provided with the distribution. // // 3. Neither the name of the copyright holder nor the names of its // contributors may be used to endorse or promote products derived from // this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #ifndef SRC_TINT_LANG_WGSL_AST_TRANSFORM_DIRECT_VARIABLE_ACCESS_H_ #define SRC_TINT_LANG_WGSL_AST_TRANSFORM_DIRECT_VARIABLE_ACCESS_H_ #include "src/tint/lang/wgsl/ast/transform/transform.h" #include "src/tint/utils/reflection/reflection.h" namespace tint::ast::transform { /// DirectVariableAccess is a transform that allows usage of pointer parameters in the 'storage', /// 'uniform' and 'workgroup' address space, and passing of pointers to sub-objects. These pointers /// are allowed with the `unrestricted_pointer_parameters` WGSL feature. /// /// DirectVariableAccess works by creating specializations of functions that have pointer /// parameters, one specialization for each pointer argument's unique access chain 'shape' from a /// unique variable. Calls to specialized functions are transformed so that the pointer arguments /// are replaced with an array of access-chain indicies, and if the pointer is in the 'function' or /// 'private' address space, also with a pointer to the root object. For more information, see the /// comments in src/tint/lang/wgsl/ast/transform/direct_variable_access.cc. /// /// @note DirectVariableAccess requires the transform::Unshadow transform to have been run first. class DirectVariableAccess final : public Castable<DirectVariableAccess, Transform> { … }; } // namespace tint::ast::transform #endif // SRC_TINT_LANG_WGSL_AST_TRANSFORM_DIRECT_VARIABLE_ACCESS_H_