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This dialect is intended to model lower level/branch based control-flow constructs. The initial set of operations are: AssertOp, BranchOp, CondBranchOp, SwitchOp; all split out from the current standard dialect. See https://discourse.llvm.org/t/standard-dialect-the-final-chapter/6061 Differential Revision: https://reviews.llvm.org/D118966
74 lines
2.8 KiB
C++
74 lines
2.8 KiB
C++
//===- ControlFlowToSPIRV.cpp - ControlFlow 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 standard dialect to SPIR-V dialect.
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Conversion/ControlFlowToSPIRV/ControlFlowToSPIRV.h"
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#include "../SPIRVCommon/Pattern.h"
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#include "mlir/Dialect/ControlFlow/IR/ControlFlowOps.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/ADT/SetVector.h"
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#include "llvm/Support/Debug.h"
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#define DEBUG_TYPE "cf-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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namespace {
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/// Converts cf.br to spv.Branch.
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struct BranchOpPattern final : public OpConversionPattern<cf::BranchOp> {
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using OpConversionPattern<cf::BranchOp>::OpConversionPattern;
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LogicalResult
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matchAndRewrite(cf::BranchOp op, OpAdaptor adaptor,
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ConversionPatternRewriter &rewriter) const override {
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rewriter.replaceOpWithNewOp<spirv::BranchOp>(op, op.getDest(),
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adaptor.getDestOperands());
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return success();
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}
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};
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/// Converts cf.cond_br to spv.BranchConditional.
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struct CondBranchOpPattern final
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: public OpConversionPattern<cf::CondBranchOp> {
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using OpConversionPattern<cf::CondBranchOp>::OpConversionPattern;
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LogicalResult
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matchAndRewrite(cf::CondBranchOp op, OpAdaptor adaptor,
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ConversionPatternRewriter &rewriter) const override {
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rewriter.replaceOpWithNewOp<spirv::BranchConditionalOp>(
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op, op.getCondition(), op.getTrueDest(), adaptor.getTrueDestOperands(),
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op.getFalseDest(), adaptor.getFalseDestOperands());
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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::cf::populateControlFlowToSPIRVPatterns(
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SPIRVTypeConverter &typeConverter, RewritePatternSet &patterns) {
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MLIRContext *context = patterns.getContext();
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patterns.add<BranchOpPattern, CondBranchOpPattern>(typeConverter, context);
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}
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