ScalarEvolutionExpressions.h revision d9480d0f6875d8aa3a0d91942d24f0ee416b1ff1
14950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner//===- llvm/Analysis/ScalarEvolutionExpressions.h - SCEV Exprs --*- C++ -*-===// 29769ab22265b313171d201b5928688524a01bd87Misha Brukman// 34950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner// The LLVM Compiler Infrastructure 44950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner// 57ed47a13356daed2a34cd2209a31f92552e3bdd8Chris Lattner// This file is distributed under the University of Illinois Open Source 67ed47a13356daed2a34cd2209a31f92552e3bdd8Chris Lattner// License. See LICENSE.TXT for details. 79769ab22265b313171d201b5928688524a01bd87Misha Brukman// 84950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner//===----------------------------------------------------------------------===// 94950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner// 104950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner// This file defines the classes used to represent and build scalar expressions. 119769ab22265b313171d201b5928688524a01bd87Misha Brukman// 124950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner//===----------------------------------------------------------------------===// 134950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 144950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner#ifndef LLVM_ANALYSIS_SCALAREVOLUTION_EXPRESSIONS_H 154950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner#define LLVM_ANALYSIS_SCALAREVOLUTION_EXPRESSIONS_H 164950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 174950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner#include "llvm/Analysis/ScalarEvolution.h" 184950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 194950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattnernamespace llvm { 204950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner class ConstantInt; 214950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner class ConstantRange; 2235fa43907e2ea751ad35bfbaab8c4d3511422c14Reid Spencer class APInt; 235a6c1a840ad343c0ed2fa54a0edb50b61f828f0fEvan Cheng class DominatorTree; 244950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 254950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner enum SCEVTypes { 264950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner // These should be ordered in terms of increasing complexity to make the 274950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner // folders simpler. 28d19534add90a2a894af61523b830887097bb780bDan Gohman scConstant, scTruncate, scZeroExtend, scSignExtend, scAddExpr, scMulExpr, 29789558db70d9513a017c11c5be30945839fdff1cNick Lewycky scUDivExpr, scAddRecExpr, scUMaxExpr, scSMaxExpr, scUnknown, 303e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky scCouldNotCompute 314950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner }; 324950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 334950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner //===--------------------------------------------------------------------===// 344950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// SCEVConstant - This class represents a constant integer value. 354950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// 364950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner class SCEVConstant : public SCEV { 37246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman friend class ScalarEvolution; 38246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman 394950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner ConstantInt *V; 409a6ae965d69b131d692de8fc69545b6c7aaea0b2Dan Gohman explicit SCEVConstant(ConstantInt *v) : SCEV(scConstant), V(v) {} 419769ab22265b313171d201b5928688524a01bd87Misha Brukman 424950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual ~SCEVConstant(); 434950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner public: 444950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner ConstantInt *getValue() const { return V; } 454950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 464950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual bool isLoopInvariant(const Loop *L) const { 474950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return true; 484950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 494950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 504950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual bool hasComputableLoopEvolution(const Loop *L) const { 514950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return false; // Not loop variant 524950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 534950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 544950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual const Type *getType() const; 554950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 56afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym, 57246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman const SCEVHandle &Conc, 58246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman ScalarEvolution &SE) const { 59afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner return this; 60afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner } 61afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner 625a6c1a840ad343c0ed2fa54a0edb50b61f828f0fEvan Cheng bool dominates(BasicBlock *BB, DominatorTree *DT) const { 635a6c1a840ad343c0ed2fa54a0edb50b61f828f0fEvan Cheng return true; 645a6c1a840ad343c0ed2fa54a0edb50b61f828f0fEvan Cheng } 655a6c1a840ad343c0ed2fa54a0edb50b61f828f0fEvan Cheng 66b7ef72963b2215ca23c27fa8ea777bada06994d0Dan Gohman virtual void print(raw_ostream &OS) const; 674950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 684950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// Methods for support type inquiry through isa, cast, and dyn_cast: 694950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEVConstant *S) { return true; } 704950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEV *S) { 714950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return S->getSCEVType() == scConstant; 724950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 734950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner }; 744950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 754950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner //===--------------------------------------------------------------------===// 7684923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman /// SCEVCastExpr - This is the base class for unary cast operator classes. 774950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// 7884923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman class SCEVCastExpr : public SCEV { 7984923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman protected: 804950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner SCEVHandle Op; 814950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner const Type *Ty; 8284923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman 8384923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman SCEVCastExpr(unsigned SCEVTy, const SCEVHandle &op, const Type *ty); 8484923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman virtual ~SCEVCastExpr(); 8584923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman 864950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner public: 874950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner const SCEVHandle &getOperand() const { return Op; } 884950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual const Type *getType() const { return Ty; } 899769ab22265b313171d201b5928688524a01bd87Misha Brukman 904950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual bool isLoopInvariant(const Loop *L) const { 914950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return Op->isLoopInvariant(L); 924950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 934950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 944950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual bool hasComputableLoopEvolution(const Loop *L) const { 954950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return Op->hasComputableLoopEvolution(L); 964950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 974950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 9884923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman virtual bool dominates(BasicBlock *BB, DominatorTree *DT) const; 9984923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman 10084923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman /// Methods for support type inquiry through isa, cast, and dyn_cast: 10184923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman static inline bool classof(const SCEVCastExpr *S) { return true; } 10284923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman static inline bool classof(const SCEV *S) { 10384923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman return S->getSCEVType() == scTruncate || 10484923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman S->getSCEVType() == scZeroExtend || 10584923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman S->getSCEVType() == scSignExtend; 10684923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman } 10784923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman }; 10884923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman 10984923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman //===--------------------------------------------------------------------===// 11084923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman /// SCEVTruncateExpr - This class represents a truncation of an integer value 11184923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman /// to a smaller integer value. 11284923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman /// 11384923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman class SCEVTruncateExpr : public SCEVCastExpr { 11484923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman friend class ScalarEvolution; 11584923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman 11684923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman SCEVTruncateExpr(const SCEVHandle &op, const Type *ty); 11784923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman virtual ~SCEVTruncateExpr(); 11884923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman 11984923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman public: 120afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym, 121246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman const SCEVHandle &Conc, 122246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman ScalarEvolution &SE) const { 123246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman SCEVHandle H = Op->replaceSymbolicValuesWithConcrete(Sym, Conc, SE); 124afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner if (H == Op) 125afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner return this; 126246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman return SE.getTruncateExpr(H, Ty); 127afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner } 128afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner 129b7ef72963b2215ca23c27fa8ea777bada06994d0Dan Gohman virtual void print(raw_ostream &OS) const; 1304950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 1314950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// Methods for support type inquiry through isa, cast, and dyn_cast: 1324950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEVTruncateExpr *S) { return true; } 1334950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEV *S) { 1344950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return S->getSCEVType() == scTruncate; 1354950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 1364950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner }; 1374950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 1384950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner //===--------------------------------------------------------------------===// 1394950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// SCEVZeroExtendExpr - This class represents a zero extension of a small 1404950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// integer value to a larger integer value. 1414950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// 14284923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman class SCEVZeroExtendExpr : public SCEVCastExpr { 143246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman friend class ScalarEvolution; 144246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman 1454950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner SCEVZeroExtendExpr(const SCEVHandle &op, const Type *ty); 1464950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual ~SCEVZeroExtendExpr(); 1474950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 14884923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman public: 149afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym, 150246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman const SCEVHandle &Conc, 151246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman ScalarEvolution &SE) const { 152246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman SCEVHandle H = Op->replaceSymbolicValuesWithConcrete(Sym, Conc, SE); 153afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner if (H == Op) 154afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner return this; 155246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman return SE.getZeroExtendExpr(H, Ty); 156afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner } 157afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner 158b7ef72963b2215ca23c27fa8ea777bada06994d0Dan Gohman virtual void print(raw_ostream &OS) const; 1594950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 1604950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// Methods for support type inquiry through isa, cast, and dyn_cast: 1614950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEVZeroExtendExpr *S) { return true; } 1624950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEV *S) { 1634950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return S->getSCEVType() == scZeroExtend; 1644950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 1654950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner }; 1664950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 167d19534add90a2a894af61523b830887097bb780bDan Gohman //===--------------------------------------------------------------------===// 168d19534add90a2a894af61523b830887097bb780bDan Gohman /// SCEVSignExtendExpr - This class represents a sign extension of a small 169d19534add90a2a894af61523b830887097bb780bDan Gohman /// integer value to a larger integer value. 170d19534add90a2a894af61523b830887097bb780bDan Gohman /// 17184923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman class SCEVSignExtendExpr : public SCEVCastExpr { 172246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman friend class ScalarEvolution; 173246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman 174d19534add90a2a894af61523b830887097bb780bDan Gohman SCEVSignExtendExpr(const SCEVHandle &op, const Type *ty); 175d19534add90a2a894af61523b830887097bb780bDan Gohman virtual ~SCEVSignExtendExpr(); 176d19534add90a2a894af61523b830887097bb780bDan Gohman 17784923602fdc2a81957e5dee178d5737ad8e72f55Dan Gohman public: 178d19534add90a2a894af61523b830887097bb780bDan Gohman SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym, 179246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman const SCEVHandle &Conc, 180246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman ScalarEvolution &SE) const { 181246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman SCEVHandle H = Op->replaceSymbolicValuesWithConcrete(Sym, Conc, SE); 182d19534add90a2a894af61523b830887097bb780bDan Gohman if (H == Op) 183d19534add90a2a894af61523b830887097bb780bDan Gohman return this; 184246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman return SE.getSignExtendExpr(H, Ty); 185d19534add90a2a894af61523b830887097bb780bDan Gohman } 186d19534add90a2a894af61523b830887097bb780bDan Gohman 187b7ef72963b2215ca23c27fa8ea777bada06994d0Dan Gohman virtual void print(raw_ostream &OS) const; 188d19534add90a2a894af61523b830887097bb780bDan Gohman 189d19534add90a2a894af61523b830887097bb780bDan Gohman /// Methods for support type inquiry through isa, cast, and dyn_cast: 190d19534add90a2a894af61523b830887097bb780bDan Gohman static inline bool classof(const SCEVSignExtendExpr *S) { return true; } 191d19534add90a2a894af61523b830887097bb780bDan Gohman static inline bool classof(const SCEV *S) { 192d19534add90a2a894af61523b830887097bb780bDan Gohman return S->getSCEVType() == scSignExtend; 193d19534add90a2a894af61523b830887097bb780bDan Gohman } 194d19534add90a2a894af61523b830887097bb780bDan Gohman }; 195d19534add90a2a894af61523b830887097bb780bDan Gohman 1964950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 197d9480d0f6875d8aa3a0d91942d24f0ee416b1ff1Dan Gohman //===--------------------------------------------------------------------===// 198d9480d0f6875d8aa3a0d91942d24f0ee416b1ff1Dan Gohman /// SCEVNAryExpr - This node is a base class providing common 199d9480d0f6875d8aa3a0d91942d24f0ee416b1ff1Dan Gohman /// functionality for n'ary operators. 200d9480d0f6875d8aa3a0d91942d24f0ee416b1ff1Dan Gohman /// 201ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman class SCEVNAryExpr : public SCEV { 202ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman protected: 2034950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner std::vector<SCEVHandle> Operands; 2044950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 205ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman SCEVNAryExpr(enum SCEVTypes T, const std::vector<SCEVHandle> &ops) 206ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman : SCEV(T), Operands(ops) {} 207ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman virtual ~SCEVNAryExpr() {} 2084950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 2094950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner public: 21034cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng unsigned getNumOperands() const { return (unsigned)Operands.size(); } 2114950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner const SCEVHandle &getOperand(unsigned i) const { 2124950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner assert(i < Operands.size() && "Operand index out of range!"); 2134950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return Operands[i]; 2144950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 2154950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 2164950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner const std::vector<SCEVHandle> &getOperands() const { return Operands; } 2174950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner typedef std::vector<SCEVHandle>::const_iterator op_iterator; 2184950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner op_iterator op_begin() const { return Operands.begin(); } 2194950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner op_iterator op_end() const { return Operands.end(); } 2204950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 2214950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual bool isLoopInvariant(const Loop *L) const { 2224950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner for (unsigned i = 0, e = getNumOperands(); i != e; ++i) 2234950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner if (!getOperand(i)->isLoopInvariant(L)) return false; 2244950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return true; 2254950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 2264950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 22739592233304acbbeea8c53bac2b6a822a63a4c4bDan Gohman // hasComputableLoopEvolution - N-ary expressions have computable loop 228803513b364e27d303285d396fd8ee5b32149962aChris Lattner // evolutions iff they have at least one operand that varies with the loop, 229803513b364e27d303285d396fd8ee5b32149962aChris Lattner // but that all varying operands are computable. 2304950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual bool hasComputableLoopEvolution(const Loop *L) const { 231803513b364e27d303285d396fd8ee5b32149962aChris Lattner bool HasVarying = false; 2324950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner for (unsigned i = 0, e = getNumOperands(); i != e; ++i) 233ae9f3a3b7c915f725aef5a7250e88eaeddda03c6Anton Korobeynikov if (!getOperand(i)->isLoopInvariant(L)) { 234803513b364e27d303285d396fd8ee5b32149962aChris Lattner if (getOperand(i)->hasComputableLoopEvolution(L)) 235803513b364e27d303285d396fd8ee5b32149962aChris Lattner HasVarying = true; 236803513b364e27d303285d396fd8ee5b32149962aChris Lattner else 237803513b364e27d303285d396fd8ee5b32149962aChris Lattner return false; 238ae9f3a3b7c915f725aef5a7250e88eaeddda03c6Anton Korobeynikov } 239803513b364e27d303285d396fd8ee5b32149962aChris Lattner return HasVarying; 2404950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 2414950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 242ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman bool dominates(BasicBlock *BB, DominatorTree *DT) const; 243ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman 244ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman virtual const Type *getType() const { return getOperand(0)->getType(); } 245ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman 246ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman /// Methods for support type inquiry through isa, cast, and dyn_cast: 247ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman static inline bool classof(const SCEVNAryExpr *S) { return true; } 248ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman static inline bool classof(const SCEV *S) { 249ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman return S->getSCEVType() == scAddExpr || 250ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman S->getSCEVType() == scMulExpr || 251ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman S->getSCEVType() == scSMaxExpr || 252ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman S->getSCEVType() == scUMaxExpr || 253ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman S->getSCEVType() == scAddRecExpr; 254ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman } 255ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman }; 256ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman 257ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman //===--------------------------------------------------------------------===// 258ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman /// SCEVCommutativeExpr - This node is the base class for n'ary commutative 259ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman /// operators. 260ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman /// 261ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman class SCEVCommutativeExpr : public SCEVNAryExpr { 262ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman protected: 263ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman SCEVCommutativeExpr(enum SCEVTypes T, const std::vector<SCEVHandle> &ops) 264ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman : SCEVNAryExpr(T, ops) {} 265ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman ~SCEVCommutativeExpr(); 266ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman 267ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman public: 268afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym, 269246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman const SCEVHandle &Conc, 270246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman ScalarEvolution &SE) const; 271afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner 2724950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual const char *getOperationStr() const = 0; 2734950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 274b7ef72963b2215ca23c27fa8ea777bada06994d0Dan Gohman virtual void print(raw_ostream &OS) const; 2754950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 2764950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// Methods for support type inquiry through isa, cast, and dyn_cast: 2774950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEVCommutativeExpr *S) { return true; } 2784950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEV *S) { 2794950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return S->getSCEVType() == scAddExpr || 280c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky S->getSCEVType() == scMulExpr || 2813e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky S->getSCEVType() == scSMaxExpr || 2823e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky S->getSCEVType() == scUMaxExpr; 2834950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 2844950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner }; 2854950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 2864950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 2874950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner //===--------------------------------------------------------------------===// 2884950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// SCEVAddExpr - This node represents an addition of some number of SCEVs. 2894950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// 2904950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner class SCEVAddExpr : public SCEVCommutativeExpr { 291246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman friend class ScalarEvolution; 292246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman 293adf3eab7735741926c67e6fc12b952500c45a9baDan Gohman explicit SCEVAddExpr(const std::vector<SCEVHandle> &ops) 2944950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner : SCEVCommutativeExpr(scAddExpr, ops) { 2954950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 2964950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 2974950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner public: 2984950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual const char *getOperationStr() const { return " + "; } 2994950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 3004950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// Methods for support type inquiry through isa, cast, and dyn_cast: 3014950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEVAddExpr *S) { return true; } 3024950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEV *S) { 3034950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return S->getSCEVType() == scAddExpr; 3044950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 3054950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner }; 3064950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 3074950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner //===--------------------------------------------------------------------===// 3084950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// SCEVMulExpr - This node represents multiplication of some number of SCEVs. 3094950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// 3104950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner class SCEVMulExpr : public SCEVCommutativeExpr { 311246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman friend class ScalarEvolution; 312246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman 313adf3eab7735741926c67e6fc12b952500c45a9baDan Gohman explicit SCEVMulExpr(const std::vector<SCEVHandle> &ops) 3144950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner : SCEVCommutativeExpr(scMulExpr, ops) { 3154950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 3164950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 3174950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner public: 3184950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual const char *getOperationStr() const { return " * "; } 3194950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 3204950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// Methods for support type inquiry through isa, cast, and dyn_cast: 3214950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEVMulExpr *S) { return true; } 3224950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEV *S) { 3234950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return S->getSCEVType() == scMulExpr; 3244950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 3254950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner }; 3264950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 3274950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 3284950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner //===--------------------------------------------------------------------===// 329e3320a1bcce3f6653e109cc86ee1011b0a61d808Wojciech Matyjewicz /// SCEVUDivExpr - This class represents a binary unsigned division operation. 3304950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// 331e3320a1bcce3f6653e109cc86ee1011b0a61d808Wojciech Matyjewicz class SCEVUDivExpr : public SCEV { 332246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman friend class ScalarEvolution; 333246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman 3344950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner SCEVHandle LHS, RHS; 335e3320a1bcce3f6653e109cc86ee1011b0a61d808Wojciech Matyjewicz SCEVUDivExpr(const SCEVHandle &lhs, const SCEVHandle &rhs) 336e3320a1bcce3f6653e109cc86ee1011b0a61d808Wojciech Matyjewicz : SCEV(scUDivExpr), LHS(lhs), RHS(rhs) {} 3374950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 338e3320a1bcce3f6653e109cc86ee1011b0a61d808Wojciech Matyjewicz virtual ~SCEVUDivExpr(); 3394950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner public: 3404950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner const SCEVHandle &getLHS() const { return LHS; } 3414950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner const SCEVHandle &getRHS() const { return RHS; } 3424950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 3434950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual bool isLoopInvariant(const Loop *L) const { 3444950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return LHS->isLoopInvariant(L) && RHS->isLoopInvariant(L); 3454950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 3464950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 3474950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual bool hasComputableLoopEvolution(const Loop *L) const { 3484950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return LHS->hasComputableLoopEvolution(L) && 3494950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner RHS->hasComputableLoopEvolution(L); 3504950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 3514950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 352afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym, 353246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman const SCEVHandle &Conc, 354246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman ScalarEvolution &SE) const { 355246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman SCEVHandle L = LHS->replaceSymbolicValuesWithConcrete(Sym, Conc, SE); 356246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman SCEVHandle R = RHS->replaceSymbolicValuesWithConcrete(Sym, Conc, SE); 357afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner if (L == LHS && R == RHS) 358afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner return this; 359afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner else 360e3320a1bcce3f6653e109cc86ee1011b0a61d808Wojciech Matyjewicz return SE.getUDivExpr(L, R); 361afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner } 362afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner 3635a6c1a840ad343c0ed2fa54a0edb50b61f828f0fEvan Cheng bool dominates(BasicBlock *BB, DominatorTree *DT) const; 364afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner 3654950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual const Type *getType() const; 3664950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 367b7ef72963b2215ca23c27fa8ea777bada06994d0Dan Gohman void print(raw_ostream &OS) const; 3684950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 3694950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// Methods for support type inquiry through isa, cast, and dyn_cast: 370e3320a1bcce3f6653e109cc86ee1011b0a61d808Wojciech Matyjewicz static inline bool classof(const SCEVUDivExpr *S) { return true; } 3714950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEV *S) { 372e3320a1bcce3f6653e109cc86ee1011b0a61d808Wojciech Matyjewicz return S->getSCEVType() == scUDivExpr; 3734950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 3744950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner }; 3754950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 3764950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 3774950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner //===--------------------------------------------------------------------===// 3784950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// SCEVAddRecExpr - This node represents a polynomial recurrence on the trip 3791e59aa1332b67256dc0e76237eab7f6dd21a25b4Dan Gohman /// count of the specified loop. This is the primary focus of the 3801e59aa1332b67256dc0e76237eab7f6dd21a25b4Dan Gohman /// ScalarEvolution framework; all the other SCEV subclasses are mostly just 3811e59aa1332b67256dc0e76237eab7f6dd21a25b4Dan Gohman /// supporting infrastructure to allow SCEVAddRecExpr expressions to be 3821e59aa1332b67256dc0e76237eab7f6dd21a25b4Dan Gohman /// created and analyzed. 3834950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// 3844950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// All operands of an AddRec are required to be loop invariant. 3854950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// 386ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman class SCEVAddRecExpr : public SCEVNAryExpr { 387246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman friend class ScalarEvolution; 388246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman 3894950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner const Loop *L; 3904950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 3914950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner SCEVAddRecExpr(const std::vector<SCEVHandle> &ops, const Loop *l) 392ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman : SCEVNAryExpr(scAddRecExpr, ops), L(l) { 39334cd4a484e532cc463fd5a4bf59b88d13c5467c1Evan Cheng for (size_t i = 0, e = Operands.size(); i != e; ++i) 3944950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner assert(Operands[i]->isLoopInvariant(l) && 3954950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner "Operands of AddRec must be loop-invariant!"); 3964950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 3974950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner ~SCEVAddRecExpr(); 3984950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 399ecb403a9d3a340009c266d05cfca2bd778c7b156Dan Gohman public: 4004950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner const SCEVHandle &getStart() const { return Operands[0]; } 4014950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner const Loop *getLoop() const { return L; } 4024950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 4034950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// getStepRecurrence - This method constructs and returns the recurrence 4044950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// indicating how much this expression steps by. If this is a polynomial 4054950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// of degree N, it returns a chrec of degree N-1. 406246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman SCEVHandle getStepRecurrence(ScalarEvolution &SE) const { 40717f1972c770dc18f5c7c3c95776b4d62ae9e121dDan Gohman if (isAffine()) return getOperand(1); 408246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman return SE.getAddRecExpr(std::vector<SCEVHandle>(op_begin()+1,op_end()), 409246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman getLoop()); 4104950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 4114950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 4124950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual bool hasComputableLoopEvolution(const Loop *QL) const { 4134950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner if (L == QL) return true; 4144950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return false; 4154950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 4164950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 4174950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual bool isLoopInvariant(const Loop *QueryLoop) const; 4184950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 4194950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// isAffine - Return true if this is an affine AddRec (i.e., it represents 4204950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// an expressions A+B*x where A and B are loop invariant values. 4214950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner bool isAffine() const { 4224950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner // We know that the start value is invariant. This expression is thus 4234950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner // affine iff the step is also invariant. 4244950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return getNumOperands() == 2; 4254950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 4264950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 4274950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// isQuadratic - Return true if this is an quadratic AddRec (i.e., it 4284950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// represents an expressions A+B*x+C*x^2 where A, B and C are loop 4294950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// invariant values. This corresponds to an addrec of the form {L,+,M,+,N} 4304950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner bool isQuadratic() const { 4314950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return getNumOperands() == 3; 4324950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 4334950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 4344950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// evaluateAtIteration - Return the value of this chain of recurrences at 4354950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// the specified iteration number. 436246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman SCEVHandle evaluateAtIteration(SCEVHandle It, ScalarEvolution &SE) const; 4374950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 4384950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// getNumIterationsInRange - Return the number of iterations of this loop 4394950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// that produce values in the specified constant range. Another way of 4404950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// looking at this is that it returns the first iteration number where the 4414950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// value is not in the condition, thus computing the exit count. If the 4424950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// iteration count can't be computed, an instance of SCEVCouldNotCompute is 443eefdebe002ede066bf80859e72aec831cfd1d92dNick Lewycky /// returned. 444246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman SCEVHandle getNumIterationsInRange(ConstantRange Range, 445246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman ScalarEvolution &SE) const; 4464950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 447afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym, 448246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman const SCEVHandle &Conc, 449246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman ScalarEvolution &SE) const; 4504950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 451b7ef72963b2215ca23c27fa8ea777bada06994d0Dan Gohman virtual void print(raw_ostream &OS) const; 4524950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 4534950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// Methods for support type inquiry through isa, cast, and dyn_cast: 4544950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEVAddRecExpr *S) { return true; } 4554950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEV *S) { 4564950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return S->getSCEVType() == scAddRecExpr; 4574950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 4584950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner }; 4594950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 460c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky 461c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky //===--------------------------------------------------------------------===// 462c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky /// SCEVSMaxExpr - This class represents a signed maximum selection. 463c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky /// 464c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky class SCEVSMaxExpr : public SCEVCommutativeExpr { 465c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky friend class ScalarEvolution; 466c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky 467c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky explicit SCEVSMaxExpr(const std::vector<SCEVHandle> &ops) 468c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky : SCEVCommutativeExpr(scSMaxExpr, ops) { 469c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky } 470c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky 471c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky public: 472c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky virtual const char *getOperationStr() const { return " smax "; } 473c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky 474c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky /// Methods for support type inquiry through isa, cast, and dyn_cast: 475c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky static inline bool classof(const SCEVSMaxExpr *S) { return true; } 476c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky static inline bool classof(const SCEV *S) { 477c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky return S->getSCEVType() == scSMaxExpr; 478c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky } 479c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky }; 480c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky 481c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky 4824950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner //===--------------------------------------------------------------------===// 4833e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky /// SCEVUMaxExpr - This class represents an unsigned maximum selection. 4843e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky /// 4853e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky class SCEVUMaxExpr : public SCEVCommutativeExpr { 4863e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky friend class ScalarEvolution; 4873e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky 4883e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky explicit SCEVUMaxExpr(const std::vector<SCEVHandle> &ops) 4893e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky : SCEVCommutativeExpr(scUMaxExpr, ops) { 4903e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky } 4913e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky 4923e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky public: 4933e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky virtual const char *getOperationStr() const { return " umax "; } 4943e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky 4953e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky /// Methods for support type inquiry through isa, cast, and dyn_cast: 4963e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky static inline bool classof(const SCEVUMaxExpr *S) { return true; } 4973e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky static inline bool classof(const SCEV *S) { 4983e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky return S->getSCEVType() == scUMaxExpr; 4993e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky } 5003e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky }; 5013e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky 5023e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky 5033e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky //===--------------------------------------------------------------------===// 5044950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// SCEVUnknown - This means that we are dealing with an entirely unknown SCEV 5054950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// value, and only represent it as it's LLVM Value. This is the "bottom" 5064950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// value for the analysis. 5074950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// 5084950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner class SCEVUnknown : public SCEV { 509246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman friend class ScalarEvolution; 510246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman 5114950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner Value *V; 512adf3eab7735741926c67e6fc12b952500c45a9baDan Gohman explicit SCEVUnknown(Value *v) : SCEV(scUnknown), V(v) {} 5134950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 5144950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner protected: 5154950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner ~SCEVUnknown(); 5164950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner public: 5172cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner Value *getValue() const { return V; } 5184950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 5194950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual bool isLoopInvariant(const Loop *L) const; 5204950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual bool hasComputableLoopEvolution(const Loop *QL) const { 5214950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return false; // not computable 5224950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 5234950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 524afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym, 525246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman const SCEVHandle &Conc, 526246b2564d3bbbafe06ebf6a67745cd24141b5cb4Dan Gohman ScalarEvolution &SE) const { 527afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner if (&*Sym == this) return Conc; 528afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner return this; 529afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner } 530afc0dc7184cf73ff7ac64e516284fbe0c7023ba4Chris Lattner 5315a6c1a840ad343c0ed2fa54a0edb50b61f828f0fEvan Cheng bool dominates(BasicBlock *BB, DominatorTree *DT) const; 5325a6c1a840ad343c0ed2fa54a0edb50b61f828f0fEvan Cheng 5334950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner virtual const Type *getType() const; 5344950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 535b7ef72963b2215ca23c27fa8ea777bada06994d0Dan Gohman virtual void print(raw_ostream &OS) const; 5364950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 5374950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner /// Methods for support type inquiry through isa, cast, and dyn_cast: 5384950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEVUnknown *S) { return true; } 5394950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner static inline bool classof(const SCEV *S) { 5404950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner return S->getSCEVType() == scUnknown; 5414950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner } 5424950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner }; 5432cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner 5442cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner /// SCEVVisitor - This class defines a simple visitor class that may be used 5452cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner /// for various SCEV analysis purposes. 5462cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner template<typename SC, typename RetVal=void> 5472cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner struct SCEVVisitor { 548890f92b744fb074465bc2b7006ee753a181f62a4Dan Gohman RetVal visit(const SCEV *S) { 5492cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner switch (S->getSCEVType()) { 5502cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner case scConstant: 551890f92b744fb074465bc2b7006ee753a181f62a4Dan Gohman return ((SC*)this)->visitConstant((const SCEVConstant*)S); 5522cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner case scTruncate: 553890f92b744fb074465bc2b7006ee753a181f62a4Dan Gohman return ((SC*)this)->visitTruncateExpr((const SCEVTruncateExpr*)S); 5542cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner case scZeroExtend: 555890f92b744fb074465bc2b7006ee753a181f62a4Dan Gohman return ((SC*)this)->visitZeroExtendExpr((const SCEVZeroExtendExpr*)S); 556d19534add90a2a894af61523b830887097bb780bDan Gohman case scSignExtend: 557890f92b744fb074465bc2b7006ee753a181f62a4Dan Gohman return ((SC*)this)->visitSignExtendExpr((const SCEVSignExtendExpr*)S); 5582cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner case scAddExpr: 559890f92b744fb074465bc2b7006ee753a181f62a4Dan Gohman return ((SC*)this)->visitAddExpr((const SCEVAddExpr*)S); 5602cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner case scMulExpr: 561890f92b744fb074465bc2b7006ee753a181f62a4Dan Gohman return ((SC*)this)->visitMulExpr((const SCEVMulExpr*)S); 562e3320a1bcce3f6653e109cc86ee1011b0a61d808Wojciech Matyjewicz case scUDivExpr: 563890f92b744fb074465bc2b7006ee753a181f62a4Dan Gohman return ((SC*)this)->visitUDivExpr((const SCEVUDivExpr*)S); 5642cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner case scAddRecExpr: 565890f92b744fb074465bc2b7006ee753a181f62a4Dan Gohman return ((SC*)this)->visitAddRecExpr((const SCEVAddRecExpr*)S); 566c54c561c9f7270c055dd7ba75a3a003b771a42d9Nick Lewycky case scSMaxExpr: 567890f92b744fb074465bc2b7006ee753a181f62a4Dan Gohman return ((SC*)this)->visitSMaxExpr((const SCEVSMaxExpr*)S); 5683e6307698084e7adfc10b739442ae29742beefd0Nick Lewycky case scUMaxExpr: 569890f92b744fb074465bc2b7006ee753a181f62a4Dan Gohman return ((SC*)this)->visitUMaxExpr((const SCEVUMaxExpr*)S); 5702cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner case scUnknown: 571890f92b744fb074465bc2b7006ee753a181f62a4Dan Gohman return ((SC*)this)->visitUnknown((const SCEVUnknown*)S); 5722cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner case scCouldNotCompute: 573890f92b744fb074465bc2b7006ee753a181f62a4Dan Gohman return ((SC*)this)->visitCouldNotCompute((const SCEVCouldNotCompute*)S); 5742cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner default: 5752cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner assert(0 && "Unknown SCEV type!"); 5760ebf428e48ab258012d94d8efa05a4ae5932e2dbChris Lattner abort(); 5772cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner } 5782cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner } 5792cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner 580890f92b744fb074465bc2b7006ee753a181f62a4Dan Gohman RetVal visitCouldNotCompute(const SCEVCouldNotCompute *S) { 5812cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner assert(0 && "Invalid use of SCEVCouldNotCompute!"); 5822cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner abort(); 5832cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner return RetVal(); 5842cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner } 5852cdf0a7a32f08674562b0cf6b071b96b36421f87Chris Lattner }; 5864950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner} 5874950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner 5884950e88e0fa7c44c0b54e2f64ddf57415ed83d40Chris Lattner#endif 589