namespace llvm {
-// Provide overrides for Loop methods that don't make sense for machine loops.
-template<> inline
-PHINode *LoopBase<MachineBasicBlock>::getCanonicalInductionVariable() const {
- assert(0 && "getCanonicalInductionVariable not supported for machine loops!");
- return 0;
-}
-
-template<> inline Instruction*
-LoopBase<MachineBasicBlock>::getCanonicalInductionVariableIncrement() const {
- assert(0 &&
- "getCanonicalInductionVariableIncrement not supported for machine loops!");
- return 0;
-}
-
-template<>
-inline bool LoopBase<MachineBasicBlock>::isLoopInvariant(Value *V) const {
- assert(0 && "isLoopInvariant not supported for machine loops!");
- return false;
-}
-
-template<>
-inline Value *LoopBase<MachineBasicBlock>::getTripCount() const {
- assert(0 && "getTripCount not supported for machine loops!");
- return 0;
-}
-
-template<>
-inline bool LoopBase<MachineBasicBlock>::isLCSSAForm() const {
- assert(0 && "isLCSSAForm not supported for machine loops");
- return false;
-}
-
-typedef LoopBase<MachineBasicBlock> MachineLoop;
+class MachineLoop : public LoopBase<MachineBasicBlock, MachineLoop> {
+public:
+ MachineLoop();
+
+ /// getTopBlock - Return the "top" block in the loop, which is the first
+ /// block in the linear layout, ignoring any parts of the loop not
+ /// contiguous with the part the contains the header.
+ MachineBasicBlock *getTopBlock();
+
+ /// getBottomBlock - Return the "bottom" block in the loop, which is the last
+ /// block in the linear layout, ignoring any parts of the loop not
+ /// contiguous with the part the contains the header.
+ MachineBasicBlock *getBottomBlock();
+
+ void dump() const;
+
+private:
+ friend class LoopInfoBase<MachineBasicBlock, MachineLoop>;
+ explicit MachineLoop(MachineBasicBlock *MBB)
+ : LoopBase<MachineBasicBlock, MachineLoop>(MBB) {}
+};
class MachineLoopInfo : public MachineFunctionPass {
- LoopInfoBase<MachineBasicBlock>* LI;
- friend class LoopBase<MachineBasicBlock>;
-
- LoopInfoBase<MachineBasicBlock>& getBase() { return *LI; }
+ LoopInfoBase<MachineBasicBlock, MachineLoop> LI;
+ friend class LoopBase<MachineBasicBlock, MachineLoop>;
+
+ void operator=(const MachineLoopInfo &); // do not implement
+ MachineLoopInfo(const MachineLoopInfo &); // do not implement
+
public:
static char ID; // Pass identification, replacement for typeid
- MachineLoopInfo() : MachineFunctionPass(&ID) {
- LI = new LoopInfoBase<MachineBasicBlock>();
- }
-
- ~MachineLoopInfo() { delete LI; }
+ MachineLoopInfo() : MachineFunctionPass(ID) {}
+
+ LoopInfoBase<MachineBasicBlock, MachineLoop>& getBase() { return LI; }
/// iterator/begin/end - The interface to the top-level loops in the current
/// function.
///
- typedef std::vector<MachineLoop*>::const_iterator iterator;
- inline iterator begin() const { return LI->begin(); }
- inline iterator end() const { return LI->end(); }
- bool empty() const { return LI->empty(); }
+ typedef LoopInfoBase<MachineBasicBlock, MachineLoop>::iterator iterator;
+ inline iterator begin() const { return LI.begin(); }
+ inline iterator end() const { return LI.end(); }
+ bool empty() const { return LI.empty(); }
/// getLoopFor - Return the inner most loop that BB lives in. If a basic
/// block is in no loop (for example the entry node), null is returned.
///
inline MachineLoop *getLoopFor(const MachineBasicBlock *BB) const {
- return LI->getLoopFor(BB);
+ return LI.getLoopFor(BB);
}
/// operator[] - same as getLoopFor...
///
inline const MachineLoop *operator[](const MachineBasicBlock *BB) const {
- return LI->getLoopFor(BB);
+ return LI.getLoopFor(BB);
}
/// getLoopDepth - Return the loop nesting level of the specified block...
///
inline unsigned getLoopDepth(const MachineBasicBlock *BB) const {
- return LI->getLoopDepth(BB);
+ return LI.getLoopDepth(BB);
}
// isLoopHeader - True if the block is a loop header node
inline bool isLoopHeader(MachineBasicBlock *BB) const {
- return LI->isLoopHeader(BB);
+ return LI.isLoopHeader(BB);
}
/// runOnFunction - Calculate the natural loop information.
///
virtual bool runOnMachineFunction(MachineFunction &F);
- virtual void releaseMemory() { LI->releaseMemory(); }
+ virtual void releaseMemory() { LI.releaseMemory(); }
virtual void getAnalysisUsage(AnalysisUsage &AU) const;
/// removeLoop - This removes the specified top-level loop from this loop info
/// object. The loop is not deleted, as it will presumably be inserted into
/// another loop.
- inline MachineLoop *removeLoop(iterator I) { return LI->removeLoop(I); }
+ inline MachineLoop *removeLoop(iterator I) { return LI.removeLoop(I); }
/// changeLoopFor - Change the top-level loop that contains BB to the
/// specified loop. This should be used by transformations that restructure
/// the loop hierarchy tree.
inline void changeLoopFor(MachineBasicBlock *BB, MachineLoop *L) {
- LI->changeLoopFor(BB, L);
+ LI.changeLoopFor(BB, L);
}
/// changeTopLevelLoop - Replace the specified loop in the top-level loops
/// list with the indicated loop.
inline void changeTopLevelLoop(MachineLoop *OldLoop, MachineLoop *NewLoop) {
- LI->changeTopLevelLoop(OldLoop, NewLoop);
+ LI.changeTopLevelLoop(OldLoop, NewLoop);
}
/// addTopLevelLoop - This adds the specified loop to the collection of
/// top-level loops.
inline void addTopLevelLoop(MachineLoop *New) {
- LI->addTopLevelLoop(New);
+ LI.addTopLevelLoop(New);
}
/// removeBlock - This method completely removes BB from all data structures,
/// including all of the Loop objects it is nested in and our mapping from
/// MachineBasicBlocks to loops.
void removeBlock(MachineBasicBlock *BB) {
- LI->removeBlock(BB);
+ LI.removeBlock(BB);
}
};
// Allow clients to walk the list of nested loops...
template <> struct GraphTraits<const MachineLoop*> {
typedef const MachineLoop NodeType;
- typedef std::vector<MachineLoop*>::const_iterator ChildIteratorType;
+ typedef MachineLoopInfo::iterator ChildIteratorType;
static NodeType *getEntryNode(const MachineLoop *L) { return L; }
static inline ChildIteratorType child_begin(NodeType *N) {
template <> struct GraphTraits<MachineLoop*> {
typedef MachineLoop NodeType;
- typedef std::vector<MachineLoop*>::const_iterator ChildIteratorType;
+ typedef MachineLoopInfo::iterator ChildIteratorType;
static NodeType *getEntryNode(MachineLoop *L) { return L; }
static inline ChildIteratorType child_begin(NodeType *N) {
projects / oota-llvm.git / blobdiff