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//===- ControlFlowToSPIRV.cpp - ControlFlow to SPIR-V Patterns ------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements patterns to convert standard dialect to SPIR-V dialect.
//
//===----------------------------------------------------------------------===//
#include "mlir/Conversion/ControlFlowToSPIRV/ControlFlowToSPIRV.h"
#include "../SPIRVCommon/Pattern.h"
#include "mlir/Dialect/ControlFlow/IR/ControlFlowOps.h"
#include "mlir/Dialect/SPIRV/IR/SPIRVDialect.h"
#include "mlir/Dialect/SPIRV/IR/SPIRVOps.h"
#include "mlir/Dialect/SPIRV/Transforms/SPIRVConversion.h"
#include "mlir/Dialect/SPIRV/Utils/LayoutUtils.h"
#include "mlir/IR/AffineMap.h"
#include "mlir/Support/LogicalResult.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/Support/Debug.h"
#define DEBUG_TYPE "cf-to-spirv-pattern"
using namespace mlir;
//===----------------------------------------------------------------------===//
// Operation conversion
//===----------------------------------------------------------------------===//
namespace {
/// Converts cf.br to spv.Branch.
struct BranchOpPattern final : public OpConversionPattern<cf::BranchOp> {
using OpConversionPattern<cf::BranchOp>::OpConversionPattern;
LogicalResult
matchAndRewrite(cf::BranchOp op, OpAdaptor adaptor,
ConversionPatternRewriter &rewriter) const override {
rewriter.replaceOpWithNewOp<spirv::BranchOp>(op, op.getDest(),
adaptor.getDestOperands());
return success();
}
};
/// Converts cf.cond_br to spv.BranchConditional.
struct CondBranchOpPattern final
: public OpConversionPattern<cf::CondBranchOp> {
using OpConversionPattern<cf::CondBranchOp>::OpConversionPattern;
LogicalResult
matchAndRewrite(cf::CondBranchOp op, OpAdaptor adaptor,
ConversionPatternRewriter &rewriter) const override {
rewriter.replaceOpWithNewOp<spirv::BranchConditionalOp>(
op, op.getCondition(), op.getTrueDest(), adaptor.getTrueDestOperands(),
op.getFalseDest(), adaptor.getFalseDestOperands());
return success();
}
};
} // namespace
//===----------------------------------------------------------------------===//
// Pattern population
//===----------------------------------------------------------------------===//
void mlir::cf::populateControlFlowToSPIRVPatterns(
SPIRVTypeConverter &typeConverter, RewritePatternSet &patterns) {
MLIRContext *context = patterns.getContext();
patterns.add<BranchOpPattern, CondBranchOpPattern>(typeConverter, context);
}
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