//===-- BBLiveVar.h - Live Variable Analysis for a BasicBlock ----*- C++ -*--=//
//
-// This is a wrapper class for BasicBlock which is used by live var analysis.
+// This is a BasicBlock annotation class that is used by live var analysis to
+// hold data flow information for a basic block.
//
//===----------------------------------------------------------------------===//
#ifndef LIVE_VAR_BB_H
#define LIVE_VAR_BB_H
-#include "LiveVarSet.h"
+#include "llvm/Analysis/LiveVar/ValueSet.h"
+#include "llvm/Annotation.h"
#include <map>
-class Method;
class BasicBlock;
class Value;
+class MachineBasicBlock;
-class BBLiveVar {
- const BasicBlock *BB; // pointer to BasicBlock
+enum LiveVarDebugLevel_t {
+ LV_DEBUG_None,
+ LV_DEBUG_Normal,
+ LV_DEBUG_Instr,
+ LV_DEBUG_Verbose
+};
+
+extern LiveVarDebugLevel_t DEBUG_LV;
+
+class BBLiveVar : public Annotation {
+ const BasicBlock &BB; // pointer to BasicBlock
+ MachineBasicBlock &MBB; // Pointer to MachineBasicBlock
unsigned POID; // Post-Order ID
- LiveVarSet DefSet; // Def set for LV analysis
- LiveVarSet InSet, OutSet; // In & Out for LV analysis
+ ValueSet DefSet; // Def set (with no preceding uses) for LV analysis
+ ValueSet InSet, OutSet; // In & Out for LV analysis
bool InSetChanged, OutSetChanged; // set if the InSet/OutSet is modified
- // map that contains phi args->BB they came
- // set by calcDefUseSets & used by setPropagate
- std::map<const Value *, const BasicBlock *> PhiArgMap;
-
+ // map that contains PredBB -> Phi arguments
+ // coming in on that edge. such uses have to be
+ // treated differently from ordinary uses.
+ std::map<const BasicBlock *, ValueSet> PredToEdgeInSetMap;
+
// method to propogate an InSet to OutSet of a predecessor
- bool setPropagate(LiveVarSet *OutSetOfPred,
- const LiveVarSet *InSetOfThisBB,
+ bool setPropagate(ValueSet *OutSetOfPred,
+ const ValueSet *InSetOfThisBB,
const BasicBlock *PredBB);
// To add an operand which is a def
- void addDef(const Value *Op);
+ void addDef(const Value *Op);
// To add an operand which is a use
- void addUse(const Value *Op);
+ void addUse(const Value *Op);
+ void calcDefUseSets(); // calculates the Def & Use sets for this BB
+
+ BBLiveVar(const BasicBlock &BB, MachineBasicBlock &MBB, unsigned POID);
+ ~BBLiveVar() {} // make dtor private
public:
- BBLiveVar(const BasicBlock *BB, unsigned POID);
+ static BBLiveVar *CreateOnBB(const BasicBlock &BB, MachineBasicBlock &MBB,
+ unsigned POID);
+ static BBLiveVar *GetFromBB(const BasicBlock &BB);
+ static void RemoveFromBB(const BasicBlock &BB);
inline bool isInSetChanged() const { return InSetChanged; }
inline bool isOutSetChanged() const { return OutSetChanged; }
+ MachineBasicBlock &getMachineBasicBlock() const { return MBB; }
+
inline unsigned getPOId() const { return POID; }
- void calcDefUseSets(); // calculates the Def & Use sets for this BB
bool applyTransferFunc(); // calcultes the In in terms of Out
// calculates Out set using In sets of the predecessors
- bool applyFlowFunc(std::map<const BasicBlock *, BBLiveVar *> &LVMap);
+ bool applyFlowFunc();
- inline const LiveVarSet *getOutSet() const { return &OutSet; }
- inline const LiveVarSet *getInSet() const { return &InSet; }
+ inline const ValueSet &getOutSet() const { return OutSet; }
+ inline const ValueSet &getInSet() const { return InSet; }
void printAllSets() const; // for printing Def/In/Out sets
void printInOutSets() const; // for printing In/Out sets
};
#endif
-