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61 lines
2.0 KiB
C++
61 lines
2.0 KiB
C++
//===--- PostOrderAnalysis.h - SIL POT and RPOT Analysis --------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_SILOPTIMIZER_ANALYSIS_POSTORDERANALYSIS_H
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#define SWIFT_SILOPTIMIZER_ANALYSIS_POSTORDERANALYSIS_H
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#include "swift/Basic/Range.h"
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#include "swift/SIL/CFG.h"
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#include "swift/SIL/PostOrder.h"
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#include "swift/SIL/SILBasicBlock.h"
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#include "swift/SIL/SILFunction.h"
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#include "swift/SILOptimizer/Analysis/Analysis.h"
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#include "llvm/ADT/PostOrderIterator.h"
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#include "llvm/ADT/iterator_range.h"
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namespace swift {
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class SILBasicBlock;
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class SILFunction;
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/// This class is a simple wrapper around the POT iterator provided by LLVM. It
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/// lazily re-evaluates the post order when it is invalidated so that we do not
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/// reform the post order over and over again (it can be expensive).
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class PostOrderAnalysis : public FunctionAnalysisBase<PostOrderFunctionInfo> {
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protected:
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virtual std::unique_ptr<PostOrderFunctionInfo>
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newFunctionAnalysis(SILFunction *F) override {
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return std::make_unique<PostOrderFunctionInfo>(F);
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}
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virtual bool shouldInvalidate(SILAnalysis::InvalidationKind K) override {
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return K & InvalidationKind::Branches;
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}
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public:
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PostOrderAnalysis()
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: FunctionAnalysisBase<PostOrderFunctionInfo>(
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SILAnalysisKind::PostOrder) {}
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// This is a cache and shouldn't be copied around.
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PostOrderAnalysis(const PostOrderAnalysis &) = delete;
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PostOrderAnalysis &operator=(const PostOrderAnalysis &) = delete;
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static bool classof(const SILAnalysis *S) {
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return S->getKind() == SILAnalysisKind::PostOrder;
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}
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};
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} // end namespace swift
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#endif
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