mlir/lib/Conversion/TosaToSCF/TosaToSCFPass.cpp

   1 //===- TosaToSCFPass.cpp - Lowering Tosa to SCF Dialect -------------------===//
   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 // This transformation pass legalizes Tosa operations to the SCF dialect.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "mlir/Conversion/TosaToSCF/TosaToSCF.h"
  14
  15 #include "mlir/Dialect/Func/IR/FuncOps.h"
  16 #include "mlir/Dialect/SCF/IR/SCF.h"
  17 #include "mlir/Dialect/Tensor/IR/Tensor.h"
  18 #include "mlir/Dialect/Tosa/IR/TosaOps.h"
  19 #include "mlir/Dialect/Tosa/Transforms/Passes.h"
  20 #include "mlir/IR/PatternMatch.h"
  21 #include "mlir/Pass/PassManager.h"
  22 #include "mlir/Transforms/DialectConversion.h"
  23 #include "mlir/Transforms/GreedyPatternRewriteDriver.h"
  24
  25 namespace mlir {
  26 #define GEN_PASS_DEF_TOSATOSCF
  27 #include "mlir/Conversion/Passes.h.inc"
  28 } // namespace mlir
  29
  30 using namespace mlir;
  31 using namespace tosa;
  32
  33 namespace {
  34 struct TosaToSCF : public impl::TosaToSCFBase<TosaToSCF> {
  35 public:
  36   void runOnOperation() override {
  37     RewritePatternSet patterns(&getContext());
  38     ConversionTarget target(getContext());
  39     target.addLegalDialect<tensor::TensorDialect, scf::SCFDialect>();
  40     target.addIllegalOp<tosa::IfOp, tosa::ScatterOp, tosa::WhileOp>();
  41     target.markUnknownOpDynamicallyLegal([](Operation *) { return true; });
  42
  43     auto *op = getOperation();
  44     mlir::tosa::populateTosaToSCFConversionPatterns(&patterns);
  45     if (failed(applyPartialConversion(op, target, std::move(patterns))))
  46       signalPassFailure();
  47   }
  48 };
  49 } // namespace
  50
  51 std::unique_ptr<Pass> mlir::tosa::createTosaToSCF() {
  52   return std::make_unique<TosaToSCF>();
  53 }
  54
  55 void mlir::tosa::addTosaToSCFPasses(OpPassManager &pm) {
  56   pm.addNestedPass<func::FuncOp>(createTosaToSCF());
  57 }