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b4d268e9e1
Now that we've moved to C++14, we no longer need the llvm::make_unique implementation from STLExtras.h. This patch is a mechanical replacement of (hopefully) all the llvm::make_unique instances in the swift repo.
106 lines
3.1 KiB
C++
106 lines
3.1 KiB
C++
//===--- IVAnalysis.h - SIL IV 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_IVANALYSIS_H
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#define SWIFT_SILOPTIMIZER_ANALYSIS_IVANALYSIS_H
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#include "swift/SILOptimizer/Analysis/Analysis.h"
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#include "swift/SIL/SILArgument.h"
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#include "swift/SIL/SILValue.h"
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#include "swift/SILOptimizer/Utils/SCCVisitor.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/Support/Debug.h"
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namespace swift {
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class IVInfo : public SCCVisitor<IVInfo> {
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public:
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typedef llvm::SmallVectorImpl<SILNode *> SCCType;
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friend SCCVisitor;
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public:
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/// A descriptor for an induction variable comprised of a header argument
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/// (phi node) and an increment by an integer literal.
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class IVDesc {
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public:
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BuiltinInst *Inc;
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IntegerLiteralInst *IncVal;
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IVDesc() : Inc(nullptr), IncVal(nullptr) {}
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IVDesc(BuiltinInst *AI, IntegerLiteralInst *I) : Inc(AI), IncVal(I) {}
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operator bool() { return Inc != nullptr && IncVal != nullptr; }
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static IVDesc invalidIV() { return IVDesc(); }
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};
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IVInfo(SILFunction &F) : SCCVisitor(F) {
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run();
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}
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bool isInductionVariable(ValueBase *IV) {
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auto End = InductionVariableMap.end();
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auto Found = InductionVariableMap.find(IV);
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return Found != End;
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}
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SILArgument *getInductionVariableHeader(ValueBase *IV) {
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assert(isInductionVariable(IV) && "Expected induction variable!");
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return InductionVariableMap.find(IV)->second;
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}
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IVDesc getInductionDesc(SILArgument *Arg) {
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llvm::DenseMap<const ValueBase *, IVDesc>::iterator CI =
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InductionInfoMap.find(Arg);
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if (CI == InductionInfoMap.end())
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return IVDesc::invalidIV();
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return CI->second;
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}
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private:
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// Map from an element of an induction sequence to the header.
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llvm::DenseMap<const ValueBase *, SILArgument *> InductionVariableMap;
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// Map from an induction variable header to the induction descriptor.
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llvm::DenseMap<const ValueBase *, IVDesc> InductionInfoMap;
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SILArgument *isInductionSequence(SCCType &SCC);
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void visit(SCCType &SCC);
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};
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class IVAnalysis final : public FunctionAnalysisBase<IVInfo> {
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public:
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IVAnalysis(SILModule *)
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: FunctionAnalysisBase<IVInfo>(SILAnalysisKind::InductionVariable) {}
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IVAnalysis(const IVAnalysis &) = delete;
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IVAnalysis &operator=(const IVAnalysis &) = delete;
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static bool classof(const SILAnalysis *S) {
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return S->getKind() == SILAnalysisKind::InductionVariable;
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}
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std::unique_ptr<IVInfo> newFunctionAnalysis(SILFunction *F) override {
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return std::make_unique<IVInfo>(*F);
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}
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/// For now we always invalidate.
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virtual bool shouldInvalidate(SILAnalysis::InvalidationKind K) override {
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return true;
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}
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};
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}
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#endif
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