class ScalarEvolution;
class SCEV;
class IVUsers;
+class TargetData;
/// IVStrideUse - Keep track of one use of a strided induction variable.
/// The Expr member keeps track of the expression, User is the actual user
class IVStrideUse : public CallbackVH, public ilist_node<IVStrideUse> {
friend class IVUsers;
public:
- IVStrideUse(IVUsers *P, const SCEV *E,
- Instruction* U, Value *O)
- : CallbackVH(U), Parent(P), Expr(E), OperandValToReplace(O) {
+ IVStrideUse(IVUsers *P, Instruction* U, Value *O)
+ : CallbackVH(U), Parent(P), OperandValToReplace(O) {
}
/// getUser - Return the user instruction for this use.
setValPtr(NewUser);
}
- /// getParent - Return a pointer to the IVUsers that owns
- /// this IVStrideUse.
- IVUsers *getParent() const { return Parent; }
-
- /// getExpr - Return the expression for the use.
- const SCEV *getExpr() const { return Expr; }
-
- /// setExpr - Assign a new expression to this use.
- void setExpr(const SCEV *Val) {
- Expr = Val;
- }
-
- const SCEV *getStride(const Loop *L) const;
-
/// getOperandValToReplace - Return the Value of the operand in the user
/// instruction that this IVStrideUse is representing.
Value *getOperandValToReplace() const {
/// Parent - a pointer to the IVUsers that owns this IVStrideUse.
IVUsers *Parent;
- /// Expr - The expression for this use.
- const SCEV *Expr;
-
/// OperandValToReplace - The Value of the operand in the user instruction
/// that this IVStrideUse is representing.
WeakVH OperandValToReplace;
LoopInfo *LI;
DominatorTree *DT;
ScalarEvolution *SE;
+ TargetData *TD;
SmallPtrSet<Instruction*,16> Processed;
/// IVUses - A list of all tracked IV uses of induction variable expressions
static char ID; // Pass ID, replacement for typeid
IVUsers();
+ Loop *getLoop() const { return L; }
+
/// AddUsersIfInteresting - Inspect the specified Instruction. If it is a
/// reducible SCEV, recursively add its users to the IVUsesByStride set and
/// return true. Otherwise, return false.
bool AddUsersIfInteresting(Instruction *I);
- IVStrideUse &AddUser(const SCEV *Expr,
- Instruction *User, Value *Operand);
+ IVStrideUse &AddUser(Instruction *User, Value *Operand);
/// getReplacementExpr - Return a SCEV expression which computes the
/// value of the OperandValToReplace of the given IVStrideUse.
- const SCEV *getReplacementExpr(const IVStrideUse &U) const;
+ const SCEV *getReplacementExpr(const IVStrideUse &IU) const;
+
+ /// getExpr - Return the expression for the use.
+ const SCEV *getExpr(const IVStrideUse &IU) const;
+
+ const SCEV *getStride(const IVStrideUse &IU, const Loop *L) const;
typedef ilist<IVStrideUse>::iterator iterator;
typedef ilist<IVStrideUse>::const_iterator const_iterator;
const_iterator end() const { return IVUses.end(); }
bool empty() const { return IVUses.empty(); }
+ bool isIVUserOrOperand(Instruction *Inst) const {
+ return Processed.count(Inst);
+ }
+
void print(raw_ostream &OS, const Module* = 0) const;
/// dump - This method is used for debugging.
void dump() const;
+protected:
+ bool AddUsersImpl(Instruction *I, SmallPtrSet<Loop*,16> &SimpleLoopNests);
};
Pass *createIVUsersPass();