llvm/mlir/test/lib/Analysis/TestMemRefDependenceCheck.cpp

//===- TestMemRefDependenceCheck.cpp - Test dep analysis ------------------===//
//
// 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 a pass to run pair-wise memref access dependence checks.
//
//===----------------------------------------------------------------------===//

#include "mlir/Dialect/Affine/Analysis/AffineAnalysis.h"
#include "mlir/Dialect/Affine/Analysis/AffineStructures.h"
#include "mlir/Dialect/Affine/Analysis/Utils.h"
#include "mlir/Dialect/Affine/IR/AffineOps.h"
#include "mlir/IR/Builders.h"
#include "mlir/Pass/Pass.h"
#include "llvm/Support/Debug.h"

#define DEBUG_TYPE …

usingnamespacemlir;
usingnamespacemlir::affine;

namespace {

// TODO: Add common surrounding loop depth-wise dependence checks.
/// Checks dependences between all pairs of memref accesses in a Function.
struct TestMemRefDependenceCheck
    : public PassWrapper<TestMemRefDependenceCheck, OperationPass<>> { … };

} // namespace

// Returns a result string which represents the direction vector (if there was
// a dependence), returns the string "false" otherwise.
static std::string
getDirectionVectorStr(bool ret, unsigned numCommonLoops, unsigned loopNestDepth,
                      ArrayRef<DependenceComponent> dependenceComponents) { … }

// For each access in 'loadsAndStores', runs a dependence check between this
// "source" access and all subsequent "destination" accesses in
// 'loadsAndStores'. Emits the result of the dependence check as a note with
// the source access.
static void checkDependences(ArrayRef<Operation *> loadsAndStores) { … }

/// Walks the operation adding load and store ops to 'loadsAndStores'. Runs
/// pair-wise dependence checks.
void TestMemRefDependenceCheck::runOnOperation() { … }

namespace mlir {
namespace test {
void registerTestMemRefDependenceCheck() { … }
} // namespace test
} // namespace mlir