//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
namespace llvm {
class ConstantInt;
class ConstantRange;
+ class APInt;
enum SCEVTypes {
// These should be ordered in terms of increasing complexity to make the
// folders simpler.
- scConstant, scTruncate, scZeroExtend, scAddExpr, scMulExpr, scSDivExpr,
- scAddRecExpr, scUnknown, scCouldNotCompute
+ scConstant, scTruncate, scZeroExtend, scSignExtend, scAddExpr, scMulExpr,
+ scUDivExpr, scAddRecExpr, scUMaxExpr, scSMaxExpr, scUnknown,
+ scCouldNotCompute
};
//===--------------------------------------------------------------------===//
/// SCEVConstant - This class represents a constant integer value.
///
class SCEVConstant : public SCEV {
+ friend class ScalarEvolution;
+
ConstantInt *V;
- SCEVConstant(ConstantInt *v) : SCEV(scConstant), V(v) {}
+ explicit SCEVConstant(ConstantInt *v) : SCEV(scConstant), V(v) {}
virtual ~SCEVConstant();
public:
- /// get method - This just gets and returns a new SCEVConstant object.
- ///
- static SCEVHandle get(ConstantInt *V);
-
ConstantInt *getValue() const { return V; }
/// getValueRange - Return the tightest constant bounds that this value is
virtual const Type *getType() const;
SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym,
- const SCEVHandle &Conc) const {
+ const SCEVHandle &Conc,
+ ScalarEvolution &SE) const {
return this;
}
virtual void print(std::ostream &OS) const;
+ void print(std::ostream *OS) const { if (OS) print(*OS); }
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVConstant *S) { return true; }
/// to a smaller integer value.
///
class SCEVTruncateExpr : public SCEV {
+ friend class ScalarEvolution;
+
SCEVHandle Op;
const Type *Ty;
SCEVTruncateExpr(const SCEVHandle &op, const Type *ty);
virtual ~SCEVTruncateExpr();
public:
- /// get method - This just gets and returns a new SCEVTruncate object
- ///
- static SCEVHandle get(const SCEVHandle &Op, const Type *Ty);
-
const SCEVHandle &getOperand() const { return Op; }
virtual const Type *getType() const { return Ty; }
}
SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym,
- const SCEVHandle &Conc) const {
- SCEVHandle H = Op->replaceSymbolicValuesWithConcrete(Sym, Conc);
+ const SCEVHandle &Conc,
+ ScalarEvolution &SE) const {
+ SCEVHandle H = Op->replaceSymbolicValuesWithConcrete(Sym, Conc, SE);
if (H == Op)
return this;
- return get(H, Ty);
+ return SE.getTruncateExpr(H, Ty);
}
/// getValueRange - Return the tightest constant bounds that this value is
virtual ConstantRange getValueRange() const;
virtual void print(std::ostream &OS) const;
+ void print(std::ostream *OS) const { if (OS) print(*OS); }
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVTruncateExpr *S) { return true; }
/// integer value to a larger integer value.
///
class SCEVZeroExtendExpr : public SCEV {
+ friend class ScalarEvolution;
+
SCEVHandle Op;
const Type *Ty;
SCEVZeroExtendExpr(const SCEVHandle &op, const Type *ty);
virtual ~SCEVZeroExtendExpr();
public:
- /// get method - This just gets and returns a new SCEVZeroExtend object
- ///
- static SCEVHandle get(const SCEVHandle &Op, const Type *Ty);
-
const SCEVHandle &getOperand() const { return Op; }
virtual const Type *getType() const { return Ty; }
virtual ConstantRange getValueRange() const;
SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym,
- const SCEVHandle &Conc) const {
- SCEVHandle H = Op->replaceSymbolicValuesWithConcrete(Sym, Conc);
+ const SCEVHandle &Conc,
+ ScalarEvolution &SE) const {
+ SCEVHandle H = Op->replaceSymbolicValuesWithConcrete(Sym, Conc, SE);
if (H == Op)
return this;
- return get(H, Ty);
+ return SE.getZeroExtendExpr(H, Ty);
}
virtual void print(std::ostream &OS) const;
+ void print(std::ostream *OS) const { if (OS) print(*OS); }
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVZeroExtendExpr *S) { return true; }
}
};
+ //===--------------------------------------------------------------------===//
+ /// SCEVSignExtendExpr - This class represents a sign extension of a small
+ /// integer value to a larger integer value.
+ ///
+ class SCEVSignExtendExpr : public SCEV {
+ friend class ScalarEvolution;
+
+ SCEVHandle Op;
+ const Type *Ty;
+ SCEVSignExtendExpr(const SCEVHandle &op, const Type *ty);
+ virtual ~SCEVSignExtendExpr();
+ public:
+ const SCEVHandle &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);
+ }
+
+ /// getValueRange - Return the tightest constant bounds that this value is
+ /// known to have. This method is only valid on integer SCEV objects.
+ virtual ConstantRange getValueRange() const;
+
+ SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym,
+ const SCEVHandle &Conc,
+ ScalarEvolution &SE) const {
+ SCEVHandle H = Op->replaceSymbolicValuesWithConcrete(Sym, Conc, SE);
+ if (H == Op)
+ return this;
+ return SE.getSignExtendExpr(H, Ty);
+ }
+
+ virtual void print(std::ostream &OS) const;
+ void print(std::ostream *OS) const { if (OS) print(*OS); }
+
+ /// 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) {
+ return S->getSCEVType() == scSignExtend;
+ }
+ };
+
//===--------------------------------------------------------------------===//
/// SCEVCommutativeExpr - This node is the base class for n'ary commutative
/// operators.
///
class SCEVCommutativeExpr : public SCEV {
+ friend class ScalarEvolution;
+
std::vector<SCEVHandle> Operands;
protected:
virtual bool hasComputableLoopEvolution(const Loop *L) const {
bool HasVarying = false;
for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
- if (!getOperand(i)->isLoopInvariant(L))
+ if (!getOperand(i)->isLoopInvariant(L)) {
if (getOperand(i)->hasComputableLoopEvolution(L))
HasVarying = true;
else
return false;
+ }
return HasVarying;
}
SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym,
- const SCEVHandle &Conc) const;
+ const SCEVHandle &Conc,
+ ScalarEvolution &SE) const;
virtual const char *getOperationStr() const = 0;
virtual const Type *getType() const { return getOperand(0)->getType(); }
virtual void print(std::ostream &OS) const;
+ void print(std::ostream *OS) const { if (OS) print(*OS); }
/// 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) {
return S->getSCEVType() == scAddExpr ||
- S->getSCEVType() == scMulExpr;
+ S->getSCEVType() == scMulExpr ||
+ S->getSCEVType() == scSMaxExpr ||
+ S->getSCEVType() == scUMaxExpr;
}
};
/// SCEVAddExpr - This node represents an addition of some number of SCEVs.
///
class SCEVAddExpr : public SCEVCommutativeExpr {
- SCEVAddExpr(const std::vector<SCEVHandle> &ops)
+ friend class ScalarEvolution;
+
+ explicit SCEVAddExpr(const std::vector<SCEVHandle> &ops)
: SCEVCommutativeExpr(scAddExpr, ops) {
}
public:
- static SCEVHandle get(std::vector<SCEVHandle> &Ops);
-
- static SCEVHandle get(const SCEVHandle &LHS, const SCEVHandle &RHS) {
- std::vector<SCEVHandle> Ops;
- Ops.push_back(LHS);
- Ops.push_back(RHS);
- return get(Ops);
- }
-
- static SCEVHandle get(const SCEVHandle &Op0, const SCEVHandle &Op1,
- const SCEVHandle &Op2) {
- std::vector<SCEVHandle> Ops;
- Ops.push_back(Op0);
- Ops.push_back(Op1);
- Ops.push_back(Op2);
- return get(Ops);
- }
-
virtual const char *getOperationStr() const { return " + "; }
/// Methods for support type inquiry through isa, cast, and dyn_cast:
/// SCEVMulExpr - This node represents multiplication of some number of SCEVs.
///
class SCEVMulExpr : public SCEVCommutativeExpr {
- SCEVMulExpr(const std::vector<SCEVHandle> &ops)
+ friend class ScalarEvolution;
+
+ explicit SCEVMulExpr(const std::vector<SCEVHandle> &ops)
: SCEVCommutativeExpr(scMulExpr, ops) {
}
public:
- static SCEVHandle get(std::vector<SCEVHandle> &Ops);
-
- static SCEVHandle get(const SCEVHandle &LHS, const SCEVHandle &RHS) {
- std::vector<SCEVHandle> Ops;
- Ops.push_back(LHS);
- Ops.push_back(RHS);
- return get(Ops);
- }
-
virtual const char *getOperationStr() const { return " * "; }
/// Methods for support type inquiry through isa, cast, and dyn_cast:
//===--------------------------------------------------------------------===//
- /// SCEVSDivExpr - This class represents a binary signed division operation.
+ /// SCEVUDivExpr - This class represents a binary unsigned division operation.
///
- class SCEVSDivExpr : public SCEV {
+ class SCEVUDivExpr : public SCEV {
+ friend class ScalarEvolution;
+
SCEVHandle LHS, RHS;
- SCEVSDivExpr(const SCEVHandle &lhs, const SCEVHandle &rhs)
- : SCEV(scSDivExpr), LHS(lhs), RHS(rhs) {}
+ SCEVUDivExpr(const SCEVHandle &lhs, const SCEVHandle &rhs)
+ : SCEV(scUDivExpr), LHS(lhs), RHS(rhs) {}
- virtual ~SCEVSDivExpr();
+ virtual ~SCEVUDivExpr();
public:
- /// get method - This just gets and returns a new SCEVSDiv object.
- ///
- static SCEVHandle get(const SCEVHandle &LHS, const SCEVHandle &RHS);
-
const SCEVHandle &getLHS() const { return LHS; }
const SCEVHandle &getRHS() const { return RHS; }
}
SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym,
- const SCEVHandle &Conc) const {
- SCEVHandle L = LHS->replaceSymbolicValuesWithConcrete(Sym, Conc);
- SCEVHandle R = RHS->replaceSymbolicValuesWithConcrete(Sym, Conc);
+ const SCEVHandle &Conc,
+ ScalarEvolution &SE) const {
+ SCEVHandle L = LHS->replaceSymbolicValuesWithConcrete(Sym, Conc, SE);
+ SCEVHandle R = RHS->replaceSymbolicValuesWithConcrete(Sym, Conc, SE);
if (L == LHS && R == RHS)
return this;
else
- return get(L, R);
+ return SE.getUDivExpr(L, R);
}
virtual const Type *getType() const;
void print(std::ostream &OS) const;
+ void print(std::ostream *OS) const { if (OS) print(*OS); }
/// Methods for support type inquiry through isa, cast, and dyn_cast:
- static inline bool classof(const SCEVSDivExpr *S) { return true; }
+ static inline bool classof(const SCEVUDivExpr *S) { return true; }
static inline bool classof(const SCEV *S) {
- return S->getSCEVType() == scSDivExpr;
+ return S->getSCEVType() == scUDivExpr;
}
};
/// All operands of an AddRec are required to be loop invariant.
///
class SCEVAddRecExpr : public SCEV {
+ friend class ScalarEvolution;
+
std::vector<SCEVHandle> Operands;
const Loop *L;
}
~SCEVAddRecExpr();
public:
- static SCEVHandle get(const SCEVHandle &Start, const SCEVHandle &Step,
- const Loop *);
- static SCEVHandle get(std::vector<SCEVHandle> &Operands,
- const Loop *);
- static SCEVHandle get(const std::vector<SCEVHandle> &Operands,
- const Loop *L) {
- std::vector<SCEVHandle> NewOp(Operands);
- return get(NewOp, L);
- }
-
typedef std::vector<SCEVHandle>::const_iterator op_iterator;
op_iterator op_begin() const { return Operands.begin(); }
op_iterator op_end() const { return Operands.end(); }
/// 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.
- SCEVHandle getStepRecurrence() const {
+ SCEVHandle getStepRecurrence(ScalarEvolution &SE) const {
if (getNumOperands() == 2) return getOperand(1);
- return SCEVAddRecExpr::get(std::vector<SCEVHandle>(op_begin()+1,op_end()),
- getLoop());
+ return SE.getAddRecExpr(std::vector<SCEVHandle>(op_begin()+1,op_end()),
+ getLoop());
}
virtual bool hasComputableLoopEvolution(const Loop *QL) const {
/// evaluateAtIteration - Return the value of this chain of recurrences at
/// the specified iteration number.
- SCEVHandle evaluateAtIteration(SCEVHandle It) const;
+ SCEVHandle evaluateAtIteration(SCEVHandle It, ScalarEvolution &SE) const;
/// getNumIterationsInRange - Return the number of iterations of this loop
/// that produce values in the specified constant range. Another way of
/// value is not in the condition, thus computing the exit count. If the
/// iteration count can't be computed, an instance of SCEVCouldNotCompute is
/// returned.
- SCEVHandle getNumIterationsInRange(ConstantRange Range) const;
+ SCEVHandle getNumIterationsInRange(ConstantRange Range,
+ ScalarEvolution &SE) const;
SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym,
- const SCEVHandle &Conc) const;
+ const SCEVHandle &Conc,
+ ScalarEvolution &SE) const;
virtual void print(std::ostream &OS) const;
+ void print(std::ostream *OS) const { if (OS) print(*OS); }
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVAddRecExpr *S) { return true; }
}
};
+
+ //===--------------------------------------------------------------------===//
+ /// SCEVSMaxExpr - This class represents a signed maximum selection.
+ ///
+ class SCEVSMaxExpr : public SCEVCommutativeExpr {
+ friend class ScalarEvolution;
+
+ explicit SCEVSMaxExpr(const std::vector<SCEVHandle> &ops)
+ : SCEVCommutativeExpr(scSMaxExpr, ops) {
+ }
+
+ 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) {
+ return S->getSCEVType() == scSMaxExpr;
+ }
+ };
+
+
+ //===--------------------------------------------------------------------===//
+ /// SCEVUMaxExpr - This class represents an unsigned maximum selection.
+ ///
+ class SCEVUMaxExpr : public SCEVCommutativeExpr {
+ friend class ScalarEvolution;
+
+ explicit SCEVUMaxExpr(const std::vector<SCEVHandle> &ops)
+ : SCEVCommutativeExpr(scUMaxExpr, ops) {
+ }
+
+ 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) {
+ return S->getSCEVType() == scUMaxExpr;
+ }
+ };
+
+
//===--------------------------------------------------------------------===//
/// 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 for the analysis.
///
class SCEVUnknown : public SCEV {
+ friend class ScalarEvolution;
+
Value *V;
- SCEVUnknown(Value *v) : SCEV(scUnknown), V(v) {}
+ explicit SCEVUnknown(Value *v) : SCEV(scUnknown), V(v) {}
protected:
~SCEVUnknown();
public:
- /// get method - For SCEVUnknown, this just gets and returns a new
- /// SCEVUnknown.
- static SCEVHandle get(Value *V);
-
- /// getIntegerSCEV - Given an integer or FP type, create a constant for the
- /// specified signed integer value and return a SCEV for the constant.
- static SCEVHandle getIntegerSCEV(int Val, const Type *Ty);
-
Value *getValue() const { return V; }
virtual bool isLoopInvariant(const Loop *L) const;
}
SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym,
- const SCEVHandle &Conc) const {
+ const SCEVHandle &Conc,
+ ScalarEvolution &SE) const {
if (&*Sym == this) return Conc;
return this;
}
virtual const Type *getType() const;
virtual void print(std::ostream &OS) const;
+ void print(std::ostream *OS) const { if (OS) print(*OS); }
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVUnknown *S) { return true; }
return ((SC*)this)->visitTruncateExpr((SCEVTruncateExpr*)S);
case scZeroExtend:
return ((SC*)this)->visitZeroExtendExpr((SCEVZeroExtendExpr*)S);
+ case scSignExtend:
+ return ((SC*)this)->visitSignExtendExpr((SCEVSignExtendExpr*)S);
case scAddExpr:
return ((SC*)this)->visitAddExpr((SCEVAddExpr*)S);
case scMulExpr:
return ((SC*)this)->visitMulExpr((SCEVMulExpr*)S);
- case scSDivExpr:
- return ((SC*)this)->visitSDivExpr((SCEVSDivExpr*)S);
+ case scUDivExpr:
+ return ((SC*)this)->visitUDivExpr((SCEVUDivExpr*)S);
case scAddRecExpr:
return ((SC*)this)->visitAddRecExpr((SCEVAddRecExpr*)S);
+ case scSMaxExpr:
+ return ((SC*)this)->visitSMaxExpr((SCEVSMaxExpr*)S);
+ case scUMaxExpr:
+ return ((SC*)this)->visitUMaxExpr((SCEVUMaxExpr*)S);
case scUnknown:
return ((SC*)this)->visitUnknown((SCEVUnknown*)S);
case scCouldNotCompute:
}
#endif
-
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