CodeGenRegisters.h [plain text]
#ifndef CODEGEN_REGISTERS_H
#define CODEGEN_REGISTERS_H
#include "SetTheory.h"
#include "llvm/TableGen/Record.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/Support/ErrorHandling.h"
#include <cstdlib>
#include <map>
#include <string>
#include <set>
#include <vector>
namespace llvm {
class CodeGenRegBank;
class CodeGenSubRegIndex {
Record *const TheDef;
std::string Name;
std::string Namespace;
public:
const unsigned EnumValue;
unsigned LaneMask;
CodeGenSubRegIndex(Record *R, unsigned Enum);
CodeGenSubRegIndex(StringRef N, StringRef Nspace, unsigned Enum);
const std::string &getName() const { return Name; }
const std::string &getNamespace() const { return Namespace; }
std::string getQualifiedName() const;
struct Less {
bool operator()(const CodeGenSubRegIndex *A,
const CodeGenSubRegIndex *B) const {
assert(A && B);
return A->EnumValue < B->EnumValue;
}
};
typedef std::map<CodeGenSubRegIndex*, CodeGenSubRegIndex*, Less> CompMap;
CodeGenSubRegIndex *compose(CodeGenSubRegIndex *Idx) const {
CompMap::const_iterator I = Composed.find(Idx);
return I == Composed.end() ? 0 : I->second;
}
CodeGenSubRegIndex *addComposite(CodeGenSubRegIndex *A,
CodeGenSubRegIndex *B) {
assert(A && B);
std::pair<CompMap::iterator, bool> Ins =
Composed.insert(std::make_pair(A, B));
return (Ins.second || Ins.first->second == B) ? 0 : Ins.first->second;
}
void updateComponents(CodeGenRegBank&);
const CompMap &getComposites() const { return Composed; }
unsigned computeLaneMask();
private:
CompMap Composed;
};
struct CodeGenRegister {
Record *TheDef;
unsigned EnumValue;
unsigned CostPerUse;
bool CoveredBySubRegs;
typedef std::map<CodeGenSubRegIndex*, CodeGenRegister*,
CodeGenSubRegIndex::Less> SubRegMap;
CodeGenRegister(Record *R, unsigned Enum);
const std::string &getName() const;
void buildObjectGraph(CodeGenRegBank&);
const SubRegMap &computeSubRegs(CodeGenRegBank&);
void computeSecondarySubRegs(CodeGenRegBank&);
void computeSuperRegs(CodeGenRegBank&);
const SubRegMap &getSubRegs() const {
assert(SubRegsComplete && "Must precompute sub-registers");
return SubRegs;
}
void addSubRegsPreOrder(SetVector<const CodeGenRegister*> &OSet,
CodeGenRegBank&) const;
CodeGenSubRegIndex *getSubRegIndex(const CodeGenRegister *Reg) const {
return SubReg2Idx.lookup(Reg);
}
typedef std::vector<const CodeGenRegister*> SuperRegList;
const SuperRegList &getSuperRegs() const {
assert(SubRegsComplete && "Must precompute sub-registers");
return SuperRegs;
}
ArrayRef<CodeGenRegister*> getExplicitAliases() const {
return ExplicitAliases;
}
unsigned getTopoSig() const {
assert(SuperRegsComplete && "TopoSigs haven't been computed yet.");
return TopoSig;
}
typedef SmallVector<unsigned, 16> RegUnitList;
unsigned NumNativeRegUnits;
const RegUnitList &getRegUnits() const { return RegUnits; }
ArrayRef<unsigned> getNativeRegUnits() const {
return makeArrayRef(RegUnits).slice(0, NumNativeRegUnits);
}
bool inheritRegUnits(CodeGenRegBank &RegBank);
void adoptRegUnit(unsigned RUID) { RegUnits.push_back(RUID); }
unsigned getWeight(const CodeGenRegBank &RegBank) const;
struct Less {
bool operator()(const CodeGenRegister *A,
const CodeGenRegister *B) const {
assert(A && B);
return A->EnumValue < B->EnumValue;
}
};
typedef std::set<const CodeGenRegister*, Less> Set;
void computeOverlaps(Set &Overlaps, const CodeGenRegBank&) const;
private:
bool SubRegsComplete;
bool SuperRegsComplete;
unsigned TopoSig;
SmallVector<CodeGenSubRegIndex*, 8> ExplicitSubRegIndices;
SmallVector<CodeGenRegister*, 8> ExplicitSubRegs;
SmallVector<CodeGenRegister*, 8> ExplicitAliases;
SuperRegList LeadingSuperRegs;
SubRegMap SubRegs;
SuperRegList SuperRegs;
DenseMap<const CodeGenRegister*, CodeGenSubRegIndex*> SubReg2Idx;
RegUnitList RegUnits;
};
class CodeGenRegisterClass {
CodeGenRegister::Set Members;
std::vector<SmallVector<Record*, 16> > Orders;
BitVector SubClasses;
SmallVector<CodeGenRegisterClass*, 4> SuperClasses;
Record *TheDef;
std::string Name;
void inheritProperties(CodeGenRegBank&);
DenseMap<CodeGenSubRegIndex*, CodeGenRegisterClass*> SubClassWithSubReg;
DenseMap<CodeGenSubRegIndex*,
SmallPtrSet<CodeGenRegisterClass*, 8> > SuperRegClasses;
BitVector TopoSigs;
public:
unsigned EnumValue;
std::string Namespace;
std::vector<MVT::SimpleValueType> VTs;
unsigned SpillSize;
unsigned SpillAlignment;
int CopyCost;
bool Allocatable;
std::string AltOrderSelect;
Record *getDef() const { return TheDef; }
const std::string &getName() const { return Name; }
std::string getQualifiedName() const;
const std::vector<MVT::SimpleValueType> &getValueTypes() const {return VTs;}
unsigned getNumValueTypes() const { return VTs.size(); }
MVT::SimpleValueType getValueTypeNum(unsigned VTNum) const {
if (VTNum < VTs.size())
return VTs[VTNum];
llvm_unreachable("VTNum greater than number of ValueTypes in RegClass!");
}
bool contains(const CodeGenRegister*) const;
bool hasSubClass(const CodeGenRegisterClass *RC) const {
return SubClasses.test(RC->EnumValue);
}
CodeGenRegisterClass*
getSubClassWithSubReg(CodeGenSubRegIndex *SubIdx) const {
return SubClassWithSubReg.lookup(SubIdx);
}
void setSubClassWithSubReg(CodeGenSubRegIndex *SubIdx,
CodeGenRegisterClass *SubRC) {
SubClassWithSubReg[SubIdx] = SubRC;
}
void getSuperRegClasses(CodeGenSubRegIndex *SubIdx, BitVector &Out) const;
void addSuperRegClass(CodeGenSubRegIndex *SubIdx,
CodeGenRegisterClass *SuperRC) {
SuperRegClasses[SubIdx].insert(SuperRC);
}
const BitVector &getSubClasses() const { return SubClasses; }
ArrayRef<CodeGenRegisterClass*> getSuperClasses() const {
return SuperClasses;
}
ArrayRef<Record*> getOrder(unsigned No = 0) const {
return Orders[No];
}
unsigned getNumOrders() const { return Orders.size(); }
const CodeGenRegister::Set &getMembers() const { return Members; }
const BitVector &getTopoSigs() const { return TopoSigs; }
void buildRegUnitSet(std::vector<unsigned> &RegUnits) const;
CodeGenRegisterClass(CodeGenRegBank&, Record *R);
struct Key {
const CodeGenRegister::Set *Members;
unsigned SpillSize;
unsigned SpillAlignment;
Key(const Key &O)
: Members(O.Members),
SpillSize(O.SpillSize),
SpillAlignment(O.SpillAlignment) {}
Key(const CodeGenRegister::Set *M, unsigned S = 0, unsigned A = 0)
: Members(M), SpillSize(S), SpillAlignment(A) {}
Key(const CodeGenRegisterClass &RC)
: Members(&RC.getMembers()),
SpillSize(RC.SpillSize),
SpillAlignment(RC.SpillAlignment) {}
bool operator<(const Key&) const;
};
CodeGenRegisterClass(CodeGenRegBank&, StringRef Name, Key Props);
static void computeSubClasses(CodeGenRegBank&);
};
struct RegUnit {
unsigned Weight;
const CodeGenRegister *Roots[2];
RegUnit() : Weight(0) { Roots[0] = Roots[1] = 0; }
ArrayRef<const CodeGenRegister*> getRoots() const {
assert(!(Roots[1] && !Roots[0]) && "Invalid roots array");
return makeArrayRef(Roots, !!Roots[0] + !!Roots[1]);
}
};
struct RegUnitSet {
typedef std::vector<unsigned>::const_iterator iterator;
std::string Name;
std::vector<unsigned> Units;
};
typedef SmallVector<unsigned, 16> TopoSigId;
class CodeGenRegBank {
SetTheory Sets;
std::vector<CodeGenSubRegIndex*> SubRegIndices;
DenseMap<Record*, CodeGenSubRegIndex*> Def2SubRegIdx;
CodeGenSubRegIndex *createSubRegIndex(StringRef Name, StringRef NameSpace);
typedef std::map<SmallVector<CodeGenSubRegIndex*, 8>,
CodeGenSubRegIndex*> ConcatIdxMap;
ConcatIdxMap ConcatIdx;
std::vector<CodeGenRegister*> Registers;
StringMap<CodeGenRegister*> RegistersByName;
DenseMap<Record*, CodeGenRegister*> Def2Reg;
unsigned NumNativeRegUnits;
std::map<TopoSigId, unsigned> TopoSigs;
SmallVector<RegUnit, 8> RegUnits;
std::vector<CodeGenRegisterClass*> RegClasses;
DenseMap<Record*, CodeGenRegisterClass*> Def2RC;
typedef std::map<CodeGenRegisterClass::Key, CodeGenRegisterClass*> RCKeyMap;
RCKeyMap Key2RC;
std::vector<RegUnitSet> RegUnitSets;
std::vector<std::vector<unsigned> > RegClassUnitSets;
void addToMaps(CodeGenRegisterClass*);
CodeGenRegisterClass *getOrCreateSubClass(const CodeGenRegisterClass *RC,
const CodeGenRegister::Set *Membs,
StringRef Name);
void computeInferredRegisterClasses();
void inferCommonSubClass(CodeGenRegisterClass *RC);
void inferSubClassWithSubReg(CodeGenRegisterClass *RC);
void inferMatchingSuperRegClass(CodeGenRegisterClass *RC,
unsigned FirstSubRegRC = 0);
void pruneUnitSets();
void computeRegUnitWeights();
void computeRegUnitSets();
void computeComposites();
void computeSubRegIndexLaneMasks();
public:
CodeGenRegBank(RecordKeeper&);
SetTheory &getSets() { return Sets; }
ArrayRef<CodeGenSubRegIndex*> getSubRegIndices() { return SubRegIndices; }
CodeGenSubRegIndex *getSubRegIdx(Record*);
CodeGenSubRegIndex *getCompositeSubRegIndex(CodeGenSubRegIndex *A,
CodeGenSubRegIndex *B);
CodeGenSubRegIndex *
getConcatSubRegIndex(const SmallVector<CodeGenSubRegIndex*, 8>&);
void
addConcatSubRegIndex(const SmallVector<CodeGenSubRegIndex*, 8> &Parts,
CodeGenSubRegIndex *Idx) {
ConcatIdx.insert(std::make_pair(Parts, Idx));
}
const std::vector<CodeGenRegister*> &getRegisters() { return Registers; }
const StringMap<CodeGenRegister*> &getRegistersByName() {
return RegistersByName;
}
CodeGenRegister *getReg(Record*);
unsigned getRegIndex(const CodeGenRegister *Reg) const {
return Reg->EnumValue - 1;
}
unsigned getNumTopoSigs() const {
return TopoSigs.size();
}
unsigned getTopoSig(const TopoSigId &Id) {
return TopoSigs.insert(std::make_pair(Id, TopoSigs.size())).first->second;
}
unsigned newRegUnit(CodeGenRegister *R0, CodeGenRegister *R1 = 0) {
RegUnits.resize(RegUnits.size() + 1);
RegUnits.back().Roots[0] = R0;
RegUnits.back().Roots[1] = R1;
return RegUnits.size() - 1;
}
unsigned newRegUnit(unsigned Weight) {
RegUnits.resize(RegUnits.size() + 1);
RegUnits.back().Weight = Weight;
return RegUnits.size() - 1;
}
bool isNativeUnit(unsigned RUID) {
return RUID < NumNativeRegUnits;
}
unsigned getNumNativeRegUnits() const {
return NumNativeRegUnits;
}
RegUnit &getRegUnit(unsigned RUID) { return RegUnits[RUID]; }
const RegUnit &getRegUnit(unsigned RUID) const { return RegUnits[RUID]; }
ArrayRef<CodeGenRegisterClass*> getRegClasses() const {
return RegClasses;
}
CodeGenRegisterClass *getRegClass(Record*);
const CodeGenRegisterClass* getRegClassForRegister(Record *R);
unsigned getRegUnitSetWeight(const std::vector<unsigned> &Units) const {
unsigned Weight = 0;
for (std::vector<unsigned>::const_iterator
I = Units.begin(), E = Units.end(); I != E; ++I)
Weight += getRegUnit(*I).Weight;
return Weight;
}
void increaseRegUnitWeight(unsigned RUID, unsigned Inc) {
getRegUnit(RUID).Weight += Inc;
}
unsigned getNumRegPressureSets() const { return RegUnitSets.size(); }
RegUnitSet getRegPressureSet(unsigned Idx) const {
return RegUnitSets[Idx];
}
ArrayRef<unsigned> getRCPressureSetIDs(unsigned RCIdx) const {
return RegClassUnitSets[RCIdx];
}
void computeDerivedInfo();
BitVector computeCoveredRegisters(ArrayRef<Record*> Regs);
};
}
#endif