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8ebb6ff171
This CL sketches what it takes for AffineExpr to fully have by-value semantics and not be a not-so-smart pointer anymore. This essentially makes the underyling class a simple storage struct and implements the operations on the value type directly. Since there is no forwarding of operations anymore, we can full isolate the storage class and make a hard visibility barrier by moving detail::AffineExpr into AffineExprDetail.h. AffineExprDetail.h is only included where storage-related information is needed. PiperOrigin-RevId: 216385459
71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
//===- AffineExprDetail.h - MLIR Affine Expr storage details ----*- C++ -*-===//
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//
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// Copyright 2019 The MLIR Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// =============================================================================
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//
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// This holds implementation details of AffineExpr. Ideally it would not be
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// exposed and would be kept local to AffineExpr.cpp however, MLIRContext.cpp
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// needs to know the sizes for placement-new style Allocation.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MLIR_IR_AFFINEEXPRDETAIL_H_
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#define MLIR_IR_AFFINEEXPRDETAIL_H_
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#include "mlir/IR/AffineExpr.h"
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#include "mlir/IR/MLIRContext.h"
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#include "llvm/ADT/PointerIntPair.h"
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namespace mlir {
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class MLIRContext;
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namespace detail {
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/// Base storage class appearing in an affine expression.
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struct AffineExprStorage {
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AffineExprStorage(AffineExprKind kind, MLIRContext *context)
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: contextAndKind(context, kind) {}
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llvm::PointerIntPair<MLIRContext *, 3, AffineExprKind> contextAndKind;
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};
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/// A binary operation appearing in an affine expression.
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struct AffineBinaryOpExprStorage : public AffineExprStorage {
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static AffineExpr get(AffineExprKind kind, AffineExpr lhs, AffineExpr rhs);
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AffineExpr lhs;
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AffineExpr rhs;
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};
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/// A dimensional identifier appearing in an affine expression.
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struct AffineDimExprStorage : public AffineExprStorage {
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/// Position of this identifier in the argument list.
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unsigned position;
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};
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/// A symbolic identifier appearing in an affine expression.
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struct AffineSymbolExprStorage : public AffineExprStorage {
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/// Position of this identifier in the symbol list.
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unsigned position;
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};
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/// An integer constant appearing in affine expression.
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struct AffineConstantExprStorage : public AffineExprStorage {
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// The constant.
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int64_t constant;
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};
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} // end namespace detail
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} // end namespace mlir
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#endif // MLIR_IR_AFFINEEXPRDETAIL_H_
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