| 1 | //===- DataLayoutAnalysis.cpp ---------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "mlir/Analysis/DataLayoutAnalysis.h" |
| 10 | #include "mlir/IR/BuiltinOps.h" |
| 11 | #include "mlir/IR/Operation.h" |
| 12 | #include "mlir/Interfaces/DataLayoutInterfaces.h" |
| 13 | #include "mlir/Support/LLVM.h" |
| 14 | #include <memory> |
| 15 | |
| 16 | using namespace mlir; |
| 17 | |
| 18 | DataLayoutAnalysis::DataLayoutAnalysis(Operation *root) |
| 19 | : defaultLayout(std::make_unique<DataLayout>(args: DataLayoutOpInterface())) { |
| 20 | // Construct a DataLayout if possible from the op. |
| 21 | auto computeLayout = [this](Operation *op) { |
| 22 | if (auto iface = dyn_cast<DataLayoutOpInterface>(op)) |
| 23 | layouts[op] = std::make_unique<DataLayout>(iface); |
| 24 | if (auto module = dyn_cast<ModuleOp>(op)) |
| 25 | layouts[op] = std::make_unique<DataLayout>(module); |
| 26 | }; |
| 27 | |
| 28 | // Compute layouts for both ancestors and descendants. |
| 29 | root->walk(callback&: computeLayout); |
| 30 | for (Operation *ancestor = root->getParentOp(); ancestor != nullptr; |
| 31 | ancestor = ancestor->getParentOp()) { |
| 32 | computeLayout(ancestor); |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | const DataLayout &DataLayoutAnalysis::getAbove(Operation *operation) const { |
| 37 | for (Operation *ancestor = operation->getParentOp(); ancestor != nullptr; |
| 38 | ancestor = ancestor->getParentOp()) { |
| 39 | auto it = layouts.find(Val: ancestor); |
| 40 | if (it != layouts.end()) |
| 41 | return *it->getSecond(); |
| 42 | } |
| 43 | |
| 44 | // Fallback to the default layout. |
| 45 | return *defaultLayout; |
| 46 | } |
| 47 | |
| 48 | const DataLayout &DataLayoutAnalysis::getAtOrAbove(Operation *operation) const { |
| 49 | auto it = layouts.find(Val: operation); |
| 50 | if (it != layouts.end()) |
| 51 | return *it->getSecond(); |
| 52 | return getAbove(operation); |
| 53 | } |
| 54 |