| // Copyright 2021 The Tint Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "src/tint/transform/vectorize_scalar_matrix_initializers.h" |
| |
| #include <unordered_map> |
| #include <utility> |
| |
| #include "src/tint/program_builder.h" |
| #include "src/tint/sem/call.h" |
| #include "src/tint/sem/value_constructor.h" |
| #include "src/tint/sem/value_expression.h" |
| #include "src/tint/type/abstract_numeric.h" |
| #include "src/tint/utils/map.h" |
| |
| TINT_INSTANTIATE_TYPEINFO(tint::transform::VectorizeScalarMatrixInitializers); |
| |
| namespace tint::transform { |
| namespace { |
| |
| bool ShouldRun(const Program* program) { |
| for (auto* node : program->ASTNodes().Objects()) { |
| if (auto* call = program->Sem().Get<sem::Call>(node)) { |
| if (call->Target()->Is<sem::ValueConstructor>() && call->Type()->Is<type::Matrix>()) { |
| auto& args = call->Arguments(); |
| if (!args.IsEmpty() && args[0]->Type()->UnwrapRef()->is_scalar()) { |
| return true; |
| } |
| } |
| } |
| } |
| return false; |
| } |
| |
| } // namespace |
| |
| VectorizeScalarMatrixInitializers::VectorizeScalarMatrixInitializers() = default; |
| |
| VectorizeScalarMatrixInitializers::~VectorizeScalarMatrixInitializers() = default; |
| |
| Transform::ApplyResult VectorizeScalarMatrixInitializers::Apply(const Program* src, |
| const DataMap&, |
| DataMap&) const { |
| if (!ShouldRun(src)) { |
| return SkipTransform; |
| } |
| |
| ProgramBuilder b; |
| CloneContext ctx{&b, src, /* auto_clone_symbols */ true}; |
| |
| std::unordered_map<const type::Matrix*, Symbol> scalar_inits; |
| |
| ctx.ReplaceAll([&](const ast::CallExpression* expr) -> const ast::CallExpression* { |
| auto* call = src->Sem().Get(expr)->UnwrapMaterialize()->As<sem::Call>(); |
| auto* ty_init = call->Target()->As<sem::ValueConstructor>(); |
| if (!ty_init) { |
| return nullptr; |
| } |
| auto* mat_type = call->Type()->As<type::Matrix>(); |
| if (!mat_type) { |
| return nullptr; |
| } |
| |
| auto& args = call->Arguments(); |
| if (args.IsEmpty()) { |
| return nullptr; |
| } |
| |
| // If the argument type is a matrix, then this is an identity / conversion initializer. |
| // If the argument type is a vector, then we're already column vectors. |
| // If the argument type is abstract, then we're const-expression and there's no need to |
| // adjust this, as it'll be constant folded by the backend. |
| if (args[0] |
| ->Type() |
| ->UnwrapRef() |
| ->IsAnyOf<type::Matrix, type::Vector, type::AbstractNumeric>()) { |
| return nullptr; |
| } |
| |
| // Constructs a matrix using vector columns, with the elements constructed using the |
| // 'element(uint32_t c, uint32_t r)' callback. |
| auto build_mat = [&](auto&& element) { |
| utils::Vector<const ast::Expression*, 4> columns; |
| for (uint32_t c = 0; c < mat_type->columns(); c++) { |
| utils::Vector<const ast::Expression*, 4> row_values; |
| for (uint32_t r = 0; r < mat_type->rows(); r++) { |
| row_values.Push(element(c, r)); |
| } |
| |
| // Construct the column vector. |
| columns.Push(b.vec(CreateASTTypeFor(ctx, mat_type->type()), mat_type->rows(), |
| std::move(row_values))); |
| } |
| return b.Call(CreateASTTypeFor(ctx, mat_type), columns); |
| }; |
| |
| if (args.Length() == 1) { |
| // Generate a helper function for constructing the matrix. |
| // This is done to ensure that the single argument value is only evaluated once, and |
| // with the correct expression evaluation order. |
| auto fn = utils::GetOrCreate(scalar_inits, mat_type, [&] { |
| auto name = b.Symbols().New("build_mat" + std::to_string(mat_type->columns()) + |
| "x" + std::to_string(mat_type->rows())); |
| b.Func(name, |
| utils::Vector{ |
| // Single scalar parameter |
| b.Param("value", CreateASTTypeFor(ctx, mat_type->type())), |
| }, |
| CreateASTTypeFor(ctx, mat_type), |
| utils::Vector{ |
| b.Return(build_mat([&](uint32_t, uint32_t) { // |
| return b.Expr("value"); |
| })), |
| }); |
| return name; |
| }); |
| return b.Call(fn, ctx.Clone(args[0]->Declaration())); |
| } |
| |
| if (TINT_LIKELY(args.Length() == mat_type->columns() * mat_type->rows())) { |
| return build_mat([&](uint32_t c, uint32_t r) { |
| return ctx.Clone(args[c * mat_type->rows() + r]->Declaration()); |
| }); |
| } |
| |
| TINT_ICE(Transform, b.Diagnostics()) |
| << "matrix initializer has unexpected number of arguments"; |
| return nullptr; |
| }); |
| |
| ctx.Clone(); |
| return Program(std::move(b)); |
| } |
| |
| } // namespace tint::transform |