//===- ConcatOpPatterns.cpp - Patterns related to tensor.concat lowering --===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #include "mlir/Dialect/Affine/IR/AffineOps.h" #include "mlir/Dialect/Arith/IR/Arith.h" #include "mlir/Dialect/Arith/Utils/Utils.h" #include "mlir/Dialect/Tensor/IR/Tensor.h" #include "mlir/Dialect/Tensor/Transforms/Transforms.h" #include "mlir/IR/PatternMatch.h" usingnamespacemlir; usingnamespacemlir::tensor; namespace { /// Decompose `tensor.concat` into `tensor.empty` and a chain of slice inserts. /// /// %concat = tensor.concat dim(1) %0, %1 : /// (tensor<2x3xf32>, tensor<2x4xf32>) -> tensor<2x7xf32> /// /// Becomes /// /// %empty = tensor.empty() : tensor<2x7xf32> /// %insert0 = tensor.insert_slice %0 into %empty[0, 0][2, 3][1, 1] /// %concat = tensor.insert_slice %1 into %insert0[0, 3][2, 4][1, 1] struct DecomposeTensorConcatOp : public OpRewritePattern<ConcatOp> { … }; } // namespace void mlir::tensor::populateDecomposeTensorConcatPatterns( RewritePatternSet &patterns) { … }