#define LLVM_ANALYSIS_SCALAREVOLUTION_H
#include "llvm/Pass.h"
+#include "llvm/Analysis/LoopInfo.h"
+#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Streams.h"
#include <set>
namespace llvm {
+ class APInt;
+ class ConstantInt;
class Instruction;
class Type;
class ConstantRange;
- class Loop;
- class LoopInfo;
class SCEVHandle;
+ class ScalarEvolution;
/// SCEV - This class represent an analyzed expression in the program. These
/// are reference counted opaque objects that the client is not allowed to
protected:
virtual ~SCEV();
public:
- SCEV(unsigned SCEVTy) : SCEVType(SCEVTy), RefCount(0) {}
-
- /// getNegativeSCEV - Return the SCEV object corresponding to -V.
- ///
- static SCEVHandle getNegativeSCEV(const SCEVHandle &V);
-
- /// getMinusSCEV - Return LHS-RHS.
- ///
- static SCEVHandle getMinusSCEV(const SCEVHandle &LHS,
- const SCEVHandle &RHS);
-
+ explicit SCEV(unsigned SCEVTy) : SCEVType(SCEVTy), RefCount(0) {}
unsigned getSCEVType() const { return SCEVType; }
///
virtual const Type *getType() const = 0;
+ /// getBitWidth - Get the bit width of the type, if it has one, 0 otherwise.
+ ///
+ uint32_t getBitWidth() const;
+
/// replaceSymbolicValuesWithConcrete - If this SCEV internally references
/// the symbolic value "Sym", construct and return a new SCEV that produces
/// the same value, but which uses the concrete value Conc instead of the
/// returns itself.
virtual SCEVHandle
replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym,
- const SCEVHandle &Conc) const = 0;
+ const SCEVHandle &Conc,
+ ScalarEvolution &SE) const = 0;
/// print - Print out the internal representation of this scalar to the
/// specified stream. This should really only be used for debugging
/// purposes.
- void print(llvm_ostream &OS) const {
- if (OS.stream()) print(*OS.stream());
- }
virtual void print(std::ostream &OS) const = 0;
+ void print(std::ostream *OS) const { if (OS) print(*OS); }
/// dump - This method is used for debugging.
///
void dump() const;
};
- inline llvm_ostream &operator<<(llvm_ostream &OS, const SCEV &S) {
- S.print(OS);
- return OS;
- }
inline std::ostream &operator<<(std::ostream &OS, const SCEV &S) {
S.print(OS);
return OS;
virtual bool isLoopInvariant(const Loop *L) const;
virtual const Type *getType() const;
virtual bool hasComputableLoopEvolution(const Loop *L) const;
- void print(llvm_ostream &OS) const {
- if (OS.stream()) print(*OS.stream());
- }
virtual void print(std::ostream &OS) const;
+ void print(std::ostream *OS) const { if (OS) print(*OS); }
virtual SCEVHandle
replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym,
- const SCEVHandle &Conc) const;
+ const SCEVHandle &Conc,
+ ScalarEvolution &SE) const;
/// Methods for support type inquiry through isa, cast, and dyn_cast:
static inline bool classof(const SCEVCouldNotCompute *S) { return true; }
class ScalarEvolution : public FunctionPass {
void *Impl; // ScalarEvolution uses the pimpl pattern
public:
- ScalarEvolution() : Impl(0) {}
+ static char ID; // Pass identification, replacement for typeid
+ ScalarEvolution() : FunctionPass((intptr_t)&ID), Impl(0) {}
/// getSCEV - Return a SCEV expression handle for the full generality of the
/// specified expression.
SCEVHandle getSCEV(Value *V) const;
+ SCEVHandle getConstant(ConstantInt *V);
+ SCEVHandle getConstant(const APInt& Val);
+ SCEVHandle getTruncateExpr(const SCEVHandle &Op, const Type *Ty);
+ SCEVHandle getZeroExtendExpr(const SCEVHandle &Op, const Type *Ty);
+ SCEVHandle getSignExtendExpr(const SCEVHandle &Op, const Type *Ty);
+ SCEVHandle getAddExpr(std::vector<SCEVHandle> &Ops);
+ SCEVHandle getAddExpr(const SCEVHandle &LHS, const SCEVHandle &RHS) {
+ std::vector<SCEVHandle> Ops;
+ Ops.push_back(LHS);
+ Ops.push_back(RHS);
+ return getAddExpr(Ops);
+ }
+ SCEVHandle getAddExpr(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 getAddExpr(Ops);
+ }
+ SCEVHandle getMulExpr(std::vector<SCEVHandle> &Ops);
+ SCEVHandle getMulExpr(const SCEVHandle &LHS, const SCEVHandle &RHS) {
+ std::vector<SCEVHandle> Ops;
+ Ops.push_back(LHS);
+ Ops.push_back(RHS);
+ return getMulExpr(Ops);
+ }
+ SCEVHandle getSDivExpr(const SCEVHandle &LHS, const SCEVHandle &RHS);
+ SCEVHandle getAddRecExpr(const SCEVHandle &Start, const SCEVHandle &Step,
+ const Loop *L);
+ SCEVHandle getAddRecExpr(std::vector<SCEVHandle> &Operands,
+ const Loop *L);
+ SCEVHandle getAddRecExpr(const std::vector<SCEVHandle> &Operands,
+ const Loop *L) {
+ std::vector<SCEVHandle> NewOp(Operands);
+ return getAddRecExpr(NewOp, L);
+ }
+ SCEVHandle getUnknown(Value *V);
+
+ /// getNegativeSCEV - Return the SCEV object corresponding to -V.
+ ///
+ SCEVHandle getNegativeSCEV(const SCEVHandle &V);
+
+ /// getMinusSCEV - Return LHS-RHS.
+ ///
+ SCEVHandle getMinusSCEV(const SCEVHandle &LHS,
+ const SCEVHandle &RHS);
+
+ /// getIntegerSCEV - Given an integer or FP type, create a constant for the
+ /// specified signed integer value and return a SCEV for the constant.
+ SCEVHandle getIntegerSCEV(int Val, const Type *Ty);
+
/// hasSCEV - Return true if the SCEV for this value has already been
/// computed.
bool hasSCEV(Value *V) const;
/// an analyzable loop-invariant iteration count.
bool hasLoopInvariantIterationCount(const Loop *L) const;
- /// deleteInstructionFromRecords - This method should be called by the
- /// client before it removes an instruction from the program, to make sure
+ /// deleteValueFromRecords - This method should be called by the
+ /// client before it removes a Value from the program, to make sure
/// that no dangling references are left around.
- void deleteInstructionFromRecords(Instruction *I) const;
+ void deleteValueFromRecords(Value *V) const;
virtual bool runOnFunction(Function &F);
virtual void releaseMemory();
virtual void getAnalysisUsage(AnalysisUsage &AU) const;
- void print(llvm_ostream &OS, const Module* = 0) const {
- if (OS.stream()) print(*OS.stream());
- }
virtual void print(std::ostream &OS, const Module* = 0) const;
+ void print(std::ostream *OS, const Module* M = 0) const {
+ if (OS) print(*OS, M);
+ }
};
}
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