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//===- AffineMapDetail.h - MLIR Affine Map details Class --------*- C++ -*-===//
//
// 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 holds implementation details of AffineMap.
//
//===----------------------------------------------------------------------===//
#ifndef AFFINEMAPDETAIL_H_
#define AFFINEMAPDETAIL_H_
#include "mlir/IR/AffineExpr.h"
#include "mlir/IR/AffineMap.h"
#include "mlir/Support/StorageUniquer.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/Support/TrailingObjects.h"
namespace mlir {
namespace detail {
struct AffineMapStorage final
: public StorageUniquer::BaseStorage,
public llvm::TrailingObjects<AffineMapStorage, AffineExpr> {
/// The hash key used for uniquing.
using KeyTy = std::tuple<unsigned, unsigned, ArrayRef<AffineExpr>>;
unsigned numDims;
unsigned numSymbols;
unsigned numResults;
MLIRContext *context;
/// The affine expressions for this (multi-dimensional) map.
ArrayRef<AffineExpr> results() const {
return {getTrailingObjects<AffineExpr>(), numResults};
}
bool operator==(const KeyTy &key) const {
return std::get<0>(key) == numDims && std::get<1>(key) == numSymbols &&
std::get<2>(key) == results();
}
// Constructs an AffineMapStorage from a key. The context must be set by the
// caller.
static AffineMapStorage *
construct(StorageUniquer::StorageAllocator &allocator, const KeyTy &key) {
auto results = std::get<2>(key);
auto byteSize =
AffineMapStorage::totalSizeToAlloc<AffineExpr>(results.size());
auto *rawMem = allocator.allocate(byteSize, alignof(AffineMapStorage));
auto *res = new (rawMem) AffineMapStorage();
res->numDims = std::get<0>(key);
res->numSymbols = std::get<1>(key);
res->numResults = results.size();
std::uninitialized_copy(results.begin(), results.end(),
res->getTrailingObjects<AffineExpr>());
return res;
}
};
} // namespace detail
} // namespace mlir
#endif // AFFINEMAPDETAIL_H_
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