// These should be ordered in terms of increasing complexity to make the
// folders simpler.
scConstant, scTruncate, scZeroExtend, scSignExtend, scAddExpr, scMulExpr,
- scUDivExpr, scAddRecExpr, scUMaxExpr, scSMaxExpr, scUnknown,
- scCouldNotCompute
+ scUDivExpr, scAddRecExpr, scUMaxExpr, scSMaxExpr,
+ scUnknown, scCouldNotCompute
};
//===--------------------------------------------------------------------===//
friend class ScalarEvolution;
ConstantInt *V;
- explicit SCEVConstant(ConstantInt *v) :
- SCEV(scConstant), V(v) {}
+ SCEVConstant(const FoldingSetNodeID &ID, ConstantInt *v) :
+ SCEV(ID, scConstant), V(v) {}
public:
- virtual void Profile(FoldingSetNodeID &ID) const;
-
ConstantInt *getValue() const { return V; }
virtual bool isLoopInvariant(const Loop *L) const {
virtual const Type *getType() const;
- const SCEV *replaceSymbolicValuesWithConcrete(const SCEV *Sym,
- const SCEV *Conc,
- ScalarEvolution &SE) const {
- return this;
+ 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;
/// Methods for support type inquiry through isa, cast, and dyn_cast:
const SCEV *Op;
const Type *Ty;
- SCEVCastExpr(unsigned SCEVTy, const SCEV *op, const Type *ty);
+ SCEVCastExpr(const FoldingSetNodeID &ID,
+ unsigned SCEVTy, const SCEV *op, const Type *ty);
public:
- virtual void Profile(FoldingSetNodeID &ID) const;
-
const SCEV *getOperand() const { return Op; }
virtual const Type *getType() const { return Ty; }
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;
+
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVCastExpr *S) { return true; }
static inline bool classof(const SCEV *S) {
class SCEVTruncateExpr : public SCEVCastExpr {
friend class ScalarEvolution;
- SCEVTruncateExpr(const SCEV *op, const Type *ty);
+ SCEVTruncateExpr(const FoldingSetNodeID &ID,
+ const SCEV *op, const Type *ty);
public:
- const SCEV *replaceSymbolicValuesWithConcrete(const SCEV *Sym,
- const SCEV *Conc,
- ScalarEvolution &SE) const {
- const SCEV *H = Op->replaceSymbolicValuesWithConcrete(Sym, Conc, SE);
- if (H == Op)
- return this;
- return SE.getTruncateExpr(H, Ty);
- }
-
virtual void print(raw_ostream &OS) const;
/// Methods for support type inquiry through isa, cast, and dyn_cast:
class SCEVZeroExtendExpr : public SCEVCastExpr {
friend class ScalarEvolution;
- SCEVZeroExtendExpr(const SCEV *op, const Type *ty);
+ SCEVZeroExtendExpr(const FoldingSetNodeID &ID,
+ const SCEV *op, const Type *ty);
public:
- const SCEV *replaceSymbolicValuesWithConcrete(const SCEV *Sym,
- const SCEV *Conc,
- ScalarEvolution &SE) const {
- const SCEV *H = Op->replaceSymbolicValuesWithConcrete(Sym, Conc, SE);
- if (H == Op)
- return this;
- return SE.getZeroExtendExpr(H, Ty);
- }
-
virtual void print(raw_ostream &OS) const;
/// Methods for support type inquiry through isa, cast, and dyn_cast:
class SCEVSignExtendExpr : public SCEVCastExpr {
friend class ScalarEvolution;
- SCEVSignExtendExpr(const SCEV *op, const Type *ty);
+ SCEVSignExtendExpr(const FoldingSetNodeID &ID,
+ const SCEV *op, const Type *ty);
public:
- const SCEV *replaceSymbolicValuesWithConcrete(const SCEV *Sym,
- const SCEV *Conc,
- ScalarEvolution &SE) const {
- const SCEV *H = Op->replaceSymbolicValuesWithConcrete(Sym, Conc, SE);
- if (H == Op)
- return this;
- return SE.getSignExtendExpr(H, Ty);
- }
-
virtual void print(raw_ostream &OS) const;
/// Methods for support type inquiry through isa, cast, and dyn_cast:
protected:
SmallVector<const SCEV *, 8> Operands;
- SCEVNAryExpr(enum SCEVTypes T, const SmallVectorImpl<const SCEV *> &ops)
- : SCEV(T), Operands(ops.begin(), ops.end()) {}
+ SCEVNAryExpr(const FoldingSetNodeID &ID,
+ enum SCEVTypes T, const SmallVectorImpl<const SCEV *> &ops)
+ : SCEV(ID, T), Operands(ops.begin(), ops.end()) {}
public:
- virtual void Profile(FoldingSetNodeID &ID) const;
-
unsigned getNumOperands() const { return (unsigned)Operands.size(); }
const SCEV *getOperand(unsigned i) const {
assert(i < Operands.size() && "Operand index out of range!");
return HasVarying;
}
+ virtual bool hasOperand(const SCEV *O) const {
+ for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
+ if (O == getOperand(i) || getOperand(i)->hasOperand(O))
+ return true;
+ return false;
+ }
+
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);
+ }
+
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVNAryExpr *S) { return true; }
static inline bool classof(const SCEV *S) {
///
class SCEVCommutativeExpr : public SCEVNAryExpr {
protected:
- SCEVCommutativeExpr(enum SCEVTypes T,
+ SCEVCommutativeExpr(const FoldingSetNodeID &ID,
+ enum SCEVTypes T,
const SmallVectorImpl<const SCEV *> &ops)
- : SCEVNAryExpr(T, ops) {}
+ : SCEVNAryExpr(ID, T, ops) {}
public:
- const SCEV *replaceSymbolicValuesWithConcrete(const SCEV *Sym,
- const SCEV *Conc,
- ScalarEvolution &SE) const;
-
virtual const char *getOperationStr() const = 0;
virtual void print(raw_ostream &OS) const;
class SCEVAddExpr : public SCEVCommutativeExpr {
friend class ScalarEvolution;
- explicit SCEVAddExpr(const SmallVectorImpl<const SCEV *> &ops)
- : SCEVCommutativeExpr(scAddExpr, ops) {
+ SCEVAddExpr(const FoldingSetNodeID &ID,
+ const SmallVectorImpl<const SCEV *> &ops)
+ : SCEVCommutativeExpr(ID, scAddExpr, ops) {
}
public:
virtual const char *getOperationStr() const { return " + "; }
+ virtual 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.
+ return getOperand(getNumOperands() - 1)->getType();
+ }
+
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVAddExpr *S) { return true; }
static inline bool classof(const SCEV *S) {
class SCEVMulExpr : public SCEVCommutativeExpr {
friend class ScalarEvolution;
- explicit SCEVMulExpr(const SmallVectorImpl<const SCEV *> &ops)
- : SCEVCommutativeExpr(scMulExpr, ops) {
+ SCEVMulExpr(const FoldingSetNodeID &ID,
+ const SmallVectorImpl<const SCEV *> &ops)
+ : SCEVCommutativeExpr(ID, scMulExpr, ops) {
}
public:
const SCEV *LHS;
const SCEV *RHS;
- SCEVUDivExpr(const SCEV *lhs, const SCEV *rhs)
- : SCEV(scUDivExpr), LHS(lhs), RHS(rhs) {}
+ SCEVUDivExpr(const FoldingSetNodeID &ID, const SCEV *lhs, const SCEV *rhs)
+ : SCEV(ID, scUDivExpr), LHS(lhs), RHS(rhs) {}
public:
- virtual void Profile(FoldingSetNodeID &ID) const;
-
const SCEV *getLHS() const { return LHS; }
const SCEV *getRHS() const { return RHS; }
RHS->hasComputableLoopEvolution(L);
}
- const SCEV *replaceSymbolicValuesWithConcrete(const SCEV *Sym,
- const SCEV *Conc,
- ScalarEvolution &SE) const {
- const SCEV *L = LHS->replaceSymbolicValuesWithConcrete(Sym, Conc, SE);
- const SCEV *R = RHS->replaceSymbolicValuesWithConcrete(Sym, Conc, SE);
- if (L == LHS && R == RHS)
- return this;
- else
- return SE.getUDivExpr(L, R);
+ virtual bool hasOperand(const SCEV *O) const {
+ return O == LHS || O == RHS || LHS->hasOperand(O) || RHS->hasOperand(O);
}
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;
const Loop *L;
- SCEVAddRecExpr(const SmallVectorImpl<const SCEV *> &ops, const Loop *l)
- : SCEVNAryExpr(scAddRecExpr, ops), L(l) {
+ SCEVAddRecExpr(const FoldingSetNodeID &ID,
+ const SmallVectorImpl<const SCEV *> &ops, const Loop *l)
+ : SCEVNAryExpr(ID, scAddRecExpr, ops), L(l) {
for (size_t i = 0, e = Operands.size(); i != e; ++i)
assert(Operands[i]->isLoopInvariant(l) &&
"Operands of AddRec must be loop-invariant!");
}
public:
- virtual void Profile(FoldingSetNodeID &ID) const;
-
const SCEV *getStart() const { return Operands[0]; }
const Loop *getLoop() const { return L; }
const SCEV *getNumIterationsInRange(ConstantRange Range,
ScalarEvolution &SE) const;
- const SCEV *replaceSymbolicValuesWithConcrete(const SCEV *Sym,
- const SCEV *Conc,
- ScalarEvolution &SE) const;
-
/// getPostIncExpr - Return an expression representing the value of
/// this expression one iteration of the loop ahead.
- const SCEV *getPostIncExpr(ScalarEvolution &SE) const {
- return SE.getAddExpr(this, getStepRecurrence(SE));
+ const SCEVAddRecExpr *getPostIncExpr(ScalarEvolution &SE) const {
+ return cast<SCEVAddRecExpr>(SE.getAddExpr(this, getStepRecurrence(SE)));
}
virtual void print(raw_ostream &OS) const;
class SCEVSMaxExpr : public SCEVCommutativeExpr {
friend class ScalarEvolution;
- explicit SCEVSMaxExpr(const SmallVectorImpl<const SCEV *> &ops)
- : SCEVCommutativeExpr(scSMaxExpr, ops) {
+ SCEVSMaxExpr(const FoldingSetNodeID &ID,
+ const SmallVectorImpl<const SCEV *> &ops)
+ : SCEVCommutativeExpr(ID, scSMaxExpr, ops) {
+ // Max never overflows.
+ setHasNoUnsignedWrap(true);
+ setHasNoSignedWrap(true);
}
public:
class SCEVUMaxExpr : public SCEVCommutativeExpr {
friend class ScalarEvolution;
- explicit SCEVUMaxExpr(const SmallVectorImpl<const SCEV *> &ops)
- : SCEVCommutativeExpr(scUMaxExpr, ops) {
+ SCEVUMaxExpr(const FoldingSetNodeID &ID,
+ const SmallVectorImpl<const SCEV *> &ops)
+ : SCEVCommutativeExpr(ID, scUMaxExpr, ops) {
+ // Max never overflows.
+ setHasNoUnsignedWrap(true);
+ setHasNoSignedWrap(true);
}
public:
}
};
-
//===--------------------------------------------------------------------===//
/// SCEVUnknown - This means that we are dealing with an entirely unknown SCEV
- /// value, and only represent it as it's LLVM Value. This is the "bottom"
+ /// value, and only represent it as its LLVM Value. This is the "bottom"
/// value for the analysis.
///
class SCEVUnknown : public SCEV {
friend class ScalarEvolution;
Value *V;
- explicit SCEVUnknown(Value *v) :
- SCEV(scUnknown), V(v) {}
-
- public:
- virtual void Profile(FoldingSetNodeID &ID) const;
+ SCEVUnknown(const FoldingSetNodeID &ID, Value *v) :
+ SCEV(ID, scUnknown), V(v) {}
+ public:
Value *getValue() const { return V; }
+ /// isSizeOf, isAlignOf, isOffsetOf - Test whether this is a special
+ /// constant representing a type size, alignment, or field offset in
+ /// a target-independent manner, and hasn't happened to have been
+ /// 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
}
- const SCEV *replaceSymbolicValuesWithConcrete(const SCEV *Sym,
- const SCEV *Conc,
- ScalarEvolution &SE) const {
- if (&*Sym == this) return Conc;
- return this;
+ 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;
virtual void print(raw_ostream &OS) const;
case scCouldNotCompute:
return ((SC*)this)->visitCouldNotCompute((const SCEVCouldNotCompute*)S);
default:
- LLVM_UNREACHABLE("Unknown SCEV type!");
+ llvm_unreachable("Unknown SCEV type!");
}
}
RetVal visitCouldNotCompute(const SCEVCouldNotCompute *S) {
- LLVM_UNREACHABLE("Invalid use of SCEVCouldNotCompute!");
+ llvm_unreachable("Invalid use of SCEVCouldNotCompute!");
return RetVal();
}
};
projects / oota-llvm.git / blobdiff