mlir/lib/Conversion/MathToSPIRV/MathToSPIRVPass.cpp

   1 //===- MathToSPIRVPass.cpp - Math to SPIR-V Passes ------------------------===//
   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 file implements a pass to convert standard dialect to SPIR-V dialect.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "mlir/Conversion/MathToSPIRV/MathToSPIRVPass.h"
  14
  15 #include "mlir/Conversion/MathToSPIRV/MathToSPIRV.h"
  16 #include "mlir/Dialect/SPIRV/IR/SPIRVDialect.h"
  17 #include "mlir/Dialect/SPIRV/Transforms/SPIRVConversion.h"
  18 #include "mlir/Pass/Pass.h"
  19
  20 namespace mlir {
  21 #define GEN_PASS_DEF_CONVERTMATHTOSPIRV
  22 #include "mlir/Conversion/Passes.h.inc"
  23 } // namespace mlir
  24
  25 using namespace mlir;
  26
  27 namespace {
  28 /// A pass converting MLIR Math operations into the SPIR-V dialect.
  29 class ConvertMathToSPIRVPass
  30     : public impl::ConvertMathToSPIRVBase<ConvertMathToSPIRVPass> {
  31   void runOnOperation() override;
  32 };
  33 } // namespace
  34
  35 void ConvertMathToSPIRVPass::runOnOperation() {
  36   MLIRContext *context = &getContext();
  37   Operation *op = getOperation();
  38
  39   auto targetAttr = spirv::lookupTargetEnvOrDefault(op);
  40   std::unique_ptr<ConversionTarget> target =
  41       SPIRVConversionTarget::get(targetAttr);
  42
  43   SPIRVTypeConverter typeConverter(targetAttr);
  44
  45   // Use UnrealizedConversionCast as the bridge so that we don't need to pull
  46   // in patterns for other dialects.
  47   target->addLegalOp<UnrealizedConversionCastOp>();
  48
  49   RewritePatternSet patterns(context);
  50   populateMathToSPIRVPatterns(typeConverter, patterns);
  51
  52   if (failed(applyPartialConversion(op, *target, std::move(patterns))))
  53     return signalPassFailure();
  54 }
  55
  56 std::unique_ptr<OperationPass<>> mlir::createConvertMathToSPIRVPass() {
  57   return std::make_unique<ConvertMathToSPIRVPass>();
  58 }