| 1 | //===- FuncToSPIRV.cpp - Func to SPIR-V Patterns ------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // This file implements patterns to convert Func dialect to SPIR-V dialect. |
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| 10 | // |
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| 11 | //===----------------------------------------------------------------------===// |
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| 12 | |
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| 13 | #include "mlir/Conversion/FuncToSPIRV/FuncToSPIRV.h" |
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| 14 | #include "../SPIRVCommon/Pattern.h" |
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| 15 | #include "mlir/Dialect/Func/IR/FuncOps.h" |
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| 16 | #include "mlir/Dialect/SPIRV/IR/SPIRVDialect.h" |
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| 17 | #include "mlir/Dialect/SPIRV/IR/SPIRVOps.h" |
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| 18 | #include "mlir/Dialect/SPIRV/Transforms/SPIRVConversion.h" |
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| 19 | #include "mlir/Dialect/SPIRV/Utils/LayoutUtils.h" |
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| 20 | #include "mlir/IR/AffineMap.h" |
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| 21 | #include "llvm/Support/Debug.h" |
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| 22 | |
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| 23 | #define DEBUG_TYPE "func-to-spirv-pattern" |
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| 24 | |
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| 25 | using namespace mlir; |
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| 26 | |
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| 27 | //===----------------------------------------------------------------------===// |
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| 28 | // Operation conversion |
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| 29 | //===----------------------------------------------------------------------===// |
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| 30 | |
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| 31 | // Note that DRR cannot be used for the patterns in this file: we may need to |
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| 32 | // convert type along the way, which requires ConversionPattern. DRR generates |
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| 33 | // normal RewritePattern. |
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| 34 | |
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| 35 | namespace { |
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| 36 | |
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| 37 | /// Converts func.return to spirv.Return. |
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| 38 | class ReturnOpPattern final : public OpConversionPattern<func::ReturnOp> { |
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| 39 | public: |
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| 40 | using OpConversionPattern<func::ReturnOp>::OpConversionPattern; |
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| 41 | |
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| 42 | LogicalResult |
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| 43 | matchAndRewrite(func::ReturnOp returnOp, OpAdaptor adaptor, |
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| 44 | ConversionPatternRewriter &rewriter) const override { |
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| 45 | if (returnOp.getNumOperands() > 1) |
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| 46 | return failure(); |
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| 47 | |
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| 48 | if (returnOp.getNumOperands() == 1) { |
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| 49 | rewriter.replaceOpWithNewOp<spirv::ReturnValueOp>( |
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| 50 | returnOp, adaptor.getOperands()[0]); |
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| 51 | } else { |
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| 52 | rewriter.replaceOpWithNewOp<spirv::ReturnOp>(returnOp); |
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| 53 | } |
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| 54 | return success(); |
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| 55 | } |
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| 56 | }; |
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| 57 | |
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| 58 | /// Converts func.call to spirv.FunctionCall. |
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| 59 | class CallOpPattern final : public OpConversionPattern<func::CallOp> { |
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| 60 | public: |
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| 61 | using OpConversionPattern<func::CallOp>::OpConversionPattern; |
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| 62 | |
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| 63 | LogicalResult |
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| 64 | matchAndRewrite(func::CallOp callOp, OpAdaptor adaptor, |
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| 65 | ConversionPatternRewriter &rewriter) const override { |
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| 66 | // multiple results func was not converted to spirv.func |
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| 67 | if (callOp.getNumResults() > 1) |
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| 68 | return failure(); |
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| 69 | if (callOp.getNumResults() == 1) { |
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| 70 | auto resultType = |
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| 71 | getTypeConverter()->convertType(callOp.getResult(0).getType()); |
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| 72 | if (!resultType) |
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| 73 | return failure(); |
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| 74 | rewriter.replaceOpWithNewOp<spirv::FunctionCallOp>( |
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| 75 | callOp, resultType, adaptor.getOperands(), callOp->getAttrs()); |
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| 76 | } else { |
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| 77 | rewriter.replaceOpWithNewOp<spirv::FunctionCallOp>( |
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| 78 | callOp, TypeRange(), adaptor.getOperands(), callOp->getAttrs()); |
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| 79 | } |
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| 80 | return success(); |
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| 81 | } |
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| 82 | }; |
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| 83 | |
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| 84 | } // namespace |
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| 85 | |
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| 86 | //===----------------------------------------------------------------------===// |
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| 87 | // Pattern population |
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| 88 | //===----------------------------------------------------------------------===// |
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| 89 | |
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| 90 | void mlir::populateFuncToSPIRVPatterns(const SPIRVTypeConverter &typeConverter, |
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| 91 | RewritePatternSet &patterns) { |
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| 92 | MLIRContext *context = patterns.getContext(); |
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| 93 | |
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| 94 | patterns.add<ReturnOpPattern, CallOpPattern>(arg: typeConverter, args&: context); |
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| 95 | } |
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| 96 | |
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