97 lines
3.4 KiB
C++
97 lines
3.4 KiB
C++
//===- FuncToSPIRV.cpp - Func to SPIR-V Patterns ------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements patterns to convert Func dialect to SPIR-V dialect.
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Conversion/FuncToSPIRV/FuncToSPIRV.h"
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#include "../SPIRVCommon/Pattern.h"
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#include "mlir/Dialect/Func/IR/FuncOps.h"
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#include "mlir/Dialect/SPIRV/IR/SPIRVDialect.h"
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#include "mlir/Dialect/SPIRV/IR/SPIRVOps.h"
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#include "mlir/Dialect/SPIRV/Transforms/SPIRVConversion.h"
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#include "mlir/Dialect/SPIRV/Utils/LayoutUtils.h"
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#include "mlir/IR/AffineMap.h"
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#include "mlir/Support/LogicalResult.h"
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#include "llvm/Support/Debug.h"
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#define DEBUG_TYPE "func-to-spirv-pattern"
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using namespace mlir;
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//===----------------------------------------------------------------------===//
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// Operation conversion
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//===----------------------------------------------------------------------===//
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// Note that DRR cannot be used for the patterns in this file: we may need to
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// convert type along the way, which requires ConversionPattern. DRR generates
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// normal RewritePattern.
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namespace {
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/// Converts func.return to spirv.Return.
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class ReturnOpPattern final : public OpConversionPattern<func::ReturnOp> {
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public:
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using OpConversionPattern<func::ReturnOp>::OpConversionPattern;
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LogicalResult
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matchAndRewrite(func::ReturnOp returnOp, OpAdaptor adaptor,
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ConversionPatternRewriter &rewriter) const override {
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if (returnOp.getNumOperands() > 1)
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return failure();
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if (returnOp.getNumOperands() == 1) {
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rewriter.replaceOpWithNewOp<spirv::ReturnValueOp>(
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returnOp, adaptor.getOperands()[0]);
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} else {
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rewriter.replaceOpWithNewOp<spirv::ReturnOp>(returnOp);
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}
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return success();
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}
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};
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/// Converts func.call to spirv.FunctionCall.
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class CallOpPattern final : public OpConversionPattern<func::CallOp> {
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public:
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using OpConversionPattern<func::CallOp>::OpConversionPattern;
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LogicalResult
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matchAndRewrite(func::CallOp callOp, OpAdaptor adaptor,
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ConversionPatternRewriter &rewriter) const override {
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// multiple results func was not converted to spirv.func
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if (callOp.getNumResults() > 1)
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return failure();
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if (callOp.getNumResults() == 1) {
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auto resultType =
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getTypeConverter()->convertType(callOp.getResult(0).getType());
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if (!resultType)
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return failure();
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rewriter.replaceOpWithNewOp<spirv::FunctionCallOp>(
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callOp, resultType, adaptor.getOperands(), callOp->getAttrs());
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} else {
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rewriter.replaceOpWithNewOp<spirv::FunctionCallOp>(
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callOp, TypeRange(), adaptor.getOperands(), callOp->getAttrs());
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}
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return success();
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}
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};
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} // namespace
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//===----------------------------------------------------------------------===//
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// Pattern population
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//===----------------------------------------------------------------------===//
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void mlir::populateFuncToSPIRVPatterns(SPIRVTypeConverter &typeConverter,
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RewritePatternSet &patterns) {
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MLIRContext *context = patterns.getContext();
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patterns.add<ReturnOpPattern, CallOpPattern>(typeConverter, context);
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}
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