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//==- GRWorkList.h - Worklist class used by GRCoreEngine -----------*- C++ -*-//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines GRWorkList, a pure virtual class that represents an opaque
// worklist used by GRCoreEngine to explore the reachability state space.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_ANALYSIS_GRWORKLIST
#define LLVM_CLANG_ANALYSIS_GRWORKLIST
#include "clang/Analysis/PathSensitive/GRBlockCounter.h"
#include <cstddef>
namespace clang {
class CFGBlock;
class ExplodedNode;
class ExplodedNodeImpl;
class GRWorkListUnit {
ExplodedNode* Node;
GRBlockCounter Counter;
CFGBlock* Block;
unsigned BlockIdx; // This is the index of the next statement.
public:
GRWorkListUnit(ExplodedNode* N, GRBlockCounter C,
CFGBlock* B, unsigned idx)
: Node(N),
Counter(C),
Block(B),
BlockIdx(idx) {}
explicit GRWorkListUnit(ExplodedNode* N, GRBlockCounter C)
: Node(N),
Counter(C),
Block(NULL),
BlockIdx(0) {}
ExplodedNode* getNode() const { return Node; }
GRBlockCounter getBlockCounter() const { return Counter; }
CFGBlock* getBlock() const { return Block; }
unsigned getIndex() const { return BlockIdx; }
};
class GRWorkList {
GRBlockCounter CurrentCounter;
public:
virtual ~GRWorkList();
virtual bool hasWork() const = 0;
virtual void Enqueue(const GRWorkListUnit& U) = 0;
void Enqueue(ExplodedNode* N, CFGBlock& B, unsigned idx) {
Enqueue(GRWorkListUnit(N, CurrentCounter, &B, idx));
}
void Enqueue(ExplodedNode* N) {
Enqueue(GRWorkListUnit(N, CurrentCounter));
}
virtual GRWorkListUnit Dequeue() = 0;
void setBlockCounter(GRBlockCounter C) { CurrentCounter = C; }
GRBlockCounter getBlockCounter() const { return CurrentCounter; }
static GRWorkList *MakeDFS();
static GRWorkList *MakeBFS();
static GRWorkList *MakeBFSBlockDFSContents();
};
} // end clang namespace
#endif
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