public:
ConstantInt *getValue() const { return V; }
- virtual bool isLoopInvariant(const Loop *L) const {
- return true;
- }
-
- virtual bool hasComputableLoopEvolution(const Loop *L) const {
- return false; // Not loop variant
- }
-
- virtual const Type *getType() const;
-
- virtual bool hasOperand(const SCEV *) const {
- return false;
- }
-
- bool dominates(BasicBlock *BB, DominatorTree *DT) const {
- return true;
- }
-
- bool properlyDominates(BasicBlock *BB, DominatorTree *DT) const {
- return true;
- }
-
- virtual void print(raw_ostream &OS) const;
+ Type *getType() const { return V->getType(); }
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVConstant *S) { return true; }
class SCEVCastExpr : public SCEV {
protected:
const SCEV *Op;
- const Type *Ty;
+ Type *Ty;
SCEVCastExpr(const FoldingSetNodeIDRef ID,
- unsigned SCEVTy, const SCEV *op, const Type *ty);
+ unsigned SCEVTy, const SCEV *op, Type *ty);
public:
const SCEV *getOperand() const { return Op; }
- virtual const Type *getType() const { return Ty; }
-
- virtual bool isLoopInvariant(const Loop *L) const {
- return Op->isLoopInvariant(L);
- }
-
- virtual bool hasComputableLoopEvolution(const Loop *L) const {
- return Op->hasComputableLoopEvolution(L);
- }
-
- virtual bool hasOperand(const SCEV *O) const {
- return Op == O || Op->hasOperand(O);
- }
-
- virtual bool dominates(BasicBlock *BB, DominatorTree *DT) const;
-
- virtual bool properlyDominates(BasicBlock *BB, DominatorTree *DT) const;
+ Type *getType() const { return Ty; }
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVCastExpr *S) { return true; }
friend class ScalarEvolution;
SCEVTruncateExpr(const FoldingSetNodeIDRef ID,
- const SCEV *op, const Type *ty);
+ const SCEV *op, Type *ty);
public:
- virtual void print(raw_ostream &OS) const;
-
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVTruncateExpr *S) { return true; }
static inline bool classof(const SCEV *S) {
friend class ScalarEvolution;
SCEVZeroExtendExpr(const FoldingSetNodeIDRef ID,
- const SCEV *op, const Type *ty);
+ const SCEV *op, Type *ty);
public:
- virtual void print(raw_ostream &OS) const;
-
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVZeroExtendExpr *S) { return true; }
static inline bool classof(const SCEV *S) {
friend class ScalarEvolution;
SCEVSignExtendExpr(const FoldingSetNodeIDRef ID,
- const SCEV *op, const Type *ty);
+ const SCEV *op, Type *ty);
public:
- virtual void print(raw_ostream &OS) const;
-
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVSignExtendExpr *S) { return true; }
static inline bool classof(const SCEV *S) {
op_iterator op_begin() const { return Operands; }
op_iterator op_end() const { return Operands + NumOperands; }
- virtual bool isLoopInvariant(const Loop *L) const;
-
- // hasComputableLoopEvolution - N-ary expressions have computable loop
- // evolutions iff they have at least one operand that varies with the loop,
- // but that all varying operands are computable.
- virtual bool hasComputableLoopEvolution(const Loop *L) const;
+ Type *getType() const { return getOperand(0)->getType(); }
- virtual bool hasOperand(const SCEV *O) const;
-
- bool dominates(BasicBlock *BB, DominatorTree *DT) const;
-
- bool properlyDominates(BasicBlock *BB, DominatorTree *DT) const;
-
- virtual const Type *getType() const { return getOperand(0)->getType(); }
-
- bool hasNoUnsignedWrap() const { return SubclassData & (1 << 0); }
- void setHasNoUnsignedWrap(bool B) {
- SubclassData = (SubclassData & ~(1 << 0)) | (B << 0);
- }
- bool hasNoSignedWrap() const { return SubclassData & (1 << 1); }
- void setHasNoSignedWrap(bool B) {
- SubclassData = (SubclassData & ~(1 << 1)) | (B << 1);
+ NoWrapFlags getNoWrapFlags(NoWrapFlags Mask = NoWrapMask) const {
+ return (NoWrapFlags)(SubclassData & Mask);
}
/// Methods for support type inquiry through isa, cast, and dyn_cast:
: SCEVNAryExpr(ID, T, O, N) {}
public:
- virtual const char *getOperationStr() const = 0;
-
- virtual void print(raw_ostream &OS) const;
-
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVCommutativeExpr *S) { return true; }
static inline bool classof(const SCEV *S) {
S->getSCEVType() == scSMaxExpr ||
S->getSCEVType() == scUMaxExpr;
}
+
+ /// Set flags for a non-recurrence without clearing previously set flags.
+ void setNoWrapFlags(NoWrapFlags Flags) {
+ SubclassData |= Flags;
+ }
};
}
public:
- virtual const char *getOperationStr() const { return " + "; }
-
- virtual const Type *getType() const {
+ Type *getType() const {
// Use the type of the last operand, which is likely to be a pointer
// type, if there is one. This doesn't usually matter, but it can help
// reduce casts when the expressions are expanded.
}
public:
- virtual const char *getOperationStr() const { return " * "; }
-
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVMulExpr *S) { return true; }
static inline bool classof(const SCEV *S) {
const SCEV *getLHS() const { return LHS; }
const SCEV *getRHS() const { return RHS; }
- virtual bool isLoopInvariant(const Loop *L) const {
- return LHS->isLoopInvariant(L) && RHS->isLoopInvariant(L);
- }
-
- virtual bool hasComputableLoopEvolution(const Loop *L) const {
- return LHS->hasComputableLoopEvolution(L) &&
- RHS->hasComputableLoopEvolution(L);
- }
-
- virtual bool hasOperand(const SCEV *O) const {
- return O == LHS || O == RHS || LHS->hasOperand(O) || RHS->hasOperand(O);
+ Type *getType() const {
+ // In most cases the types of LHS and RHS will be the same, but in some
+ // crazy cases one or the other may be a pointer. ScalarEvolution doesn't
+ // depend on the type for correctness, but handling types carefully can
+ // avoid extra casts in the SCEVExpander. The LHS is more likely to be
+ // a pointer type than the RHS, so use the RHS' type here.
+ return getRHS()->getType();
}
- bool dominates(BasicBlock *BB, DominatorTree *DT) const;
-
- bool properlyDominates(BasicBlock *BB, DominatorTree *DT) const;
-
- virtual const Type *getType() const;
-
- void print(raw_ostream &OS) const;
-
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVUDivExpr *S) { return true; }
static inline bool classof(const SCEV *S) {
/// getStepRecurrence - This method constructs and returns the recurrence
/// indicating how much this expression steps by. If this is a polynomial
/// of degree N, it returns a chrec of degree N-1.
+ /// We cannot determine whether the step recurrence has self-wraparound.
const SCEV *getStepRecurrence(ScalarEvolution &SE) const {
if (isAffine()) return getOperand(1);
return SE.getAddRecExpr(SmallVector<const SCEV *, 3>(op_begin()+1,
op_end()),
- getLoop());
+ getLoop(), FlagAnyWrap);
}
- virtual bool hasComputableLoopEvolution(const Loop *QL) const {
- return L == QL;
- }
-
- virtual bool isLoopInvariant(const Loop *QueryLoop) const;
-
- bool dominates(BasicBlock *BB, DominatorTree *DT) const;
-
- bool properlyDominates(BasicBlock *BB, DominatorTree *DT) const;
-
/// isAffine - Return true if this is an affine AddRec (i.e., it represents
/// an expressions A+B*x where A and B are loop invariant values.
bool isAffine() const {
return getNumOperands() == 3;
}
+ /// Set flags for a recurrence without clearing any previously set flags.
+ /// For AddRec, either NUW or NSW implies NW. Keep track of this fact here
+ /// to make it easier to propagate flags.
+ void setNoWrapFlags(NoWrapFlags Flags) {
+ if (Flags & (FlagNUW | FlagNSW))
+ Flags = ScalarEvolution::setFlags(Flags, FlagNW);
+ SubclassData |= Flags;
+ }
+
/// evaluateAtIteration - Return the value of this chain of recurrences at
/// the specified iteration number.
const SCEV *evaluateAtIteration(const SCEV *It, ScalarEvolution &SE) const;
return cast<SCEVAddRecExpr>(SE.getAddExpr(this, getStepRecurrence(SE)));
}
- virtual void print(raw_ostream &OS) const;
-
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVAddRecExpr *S) { return true; }
static inline bool classof(const SCEV *S) {
const SCEV *const *O, size_t N)
: SCEVCommutativeExpr(ID, scSMaxExpr, O, N) {
// Max never overflows.
- setHasNoUnsignedWrap(true);
- setHasNoSignedWrap(true);
+ setNoWrapFlags((NoWrapFlags)(FlagNUW | FlagNSW));
}
public:
- virtual const char *getOperationStr() const { return " smax "; }
-
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVSMaxExpr *S) { return true; }
static inline bool classof(const SCEV *S) {
const SCEV *const *O, size_t N)
: SCEVCommutativeExpr(ID, scUMaxExpr, O, N) {
// Max never overflows.
- setHasNoUnsignedWrap(true);
- setHasNoSignedWrap(true);
+ setNoWrapFlags((NoWrapFlags)(FlagNUW | FlagNSW));
}
public:
- virtual const char *getOperationStr() const { return " umax "; }
-
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVUMaxExpr *S) { return true; }
static inline bool classof(const SCEV *S) {
/// folded with other operations into something unrecognizable. This
/// is mainly only useful for pretty-printing and other situations
/// where it isn't absolutely required for these to succeed.
- bool isSizeOf(const Type *&AllocTy) const;
- bool isAlignOf(const Type *&AllocTy) const;
- bool isOffsetOf(const Type *&STy, Constant *&FieldNo) const;
-
- virtual bool isLoopInvariant(const Loop *L) const;
- virtual bool hasComputableLoopEvolution(const Loop *QL) const {
- return false; // not computable
- }
-
- virtual bool hasOperand(const SCEV *) const {
- return false;
- }
-
- bool dominates(BasicBlock *BB, DominatorTree *DT) const;
-
- bool properlyDominates(BasicBlock *BB, DominatorTree *DT) const;
-
- virtual const Type *getType() const;
+ bool isSizeOf(Type *&AllocTy) const;
+ bool isAlignOf(Type *&AllocTy) const;
+ bool isOffsetOf(Type *&STy, Constant *&FieldNo) const;
- virtual void print(raw_ostream &OS) const;
+ Type *getType() const { return getValPtr()->getType(); }
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVUnknown *S) { return true; }
RetVal visitCouldNotCompute(const SCEVCouldNotCompute *S) {
llvm_unreachable("Invalid use of SCEVCouldNotCompute!");
- return RetVal();
}
};
}
projects / oota-llvm.git / blobdiff