llvm/mlir/lib/Dialect/GPU/Transforms/AllReduceLowering.cpp

//===- AllReduceLowering.cpp - Implementation of all-reduce lowering ------===//
//
// 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 in-dialect lowering of the all-reduce op to a block of
// simpler instructions.
//
//===----------------------------------------------------------------------===//

#include "mlir/Dialect/Arith/IR/Arith.h"
#include "mlir/Dialect/ControlFlow/IR/ControlFlowOps.h"
#include "mlir/Dialect/GPU/IR/GPUDialect.h"
#include "mlir/Dialect/GPU/Transforms/Passes.h"
#include "mlir/Dialect/MemRef/IR/MemRef.h"
#include "mlir/Dialect/Vector/IR/VectorOps.h"
#include "mlir/IR/Builders.h"
#include "mlir/IR/IRMapping.h"
#include "mlir/IR/PatternMatch.h"
#include "mlir/Pass/Pass.h"
#include "llvm/Support/ErrorHandling.h"

usingnamespacemlir;

namespace {

struct GpuAllReduceRewriter { … };

struct GpuAllReduceRewrite : public RewritePattern { … };
} // namespace

void mlir::populateGpuAllReducePatterns(RewritePatternSet &patterns) { … }