//===-- Constants.cpp - Implement Constant nodes --------------------------===//
-//
+//
// 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 implements the Constant* classes...
//===----------------------------------------------------------------------===//
#include "llvm/Constants.h"
-#include "ConstantFolding.h"
+#include "ConstantFold.h"
#include "llvm/DerivedTypes.h"
-#include "llvm/iMemory.h"
-#include "llvm/SymbolTable.h"
+#include "llvm/GlobalValue.h"
+#include "llvm/Instructions.h"
#include "llvm/Module.h"
-#include "Support/StringExtras.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SmallVector.h"
#include <algorithm>
+#include <map>
using namespace llvm;
-ConstantBool *ConstantBool::True = new ConstantBool(true);
-ConstantBool *ConstantBool::False = new ConstantBool(false);
-
-
//===----------------------------------------------------------------------===//
// Constant Class
//===----------------------------------------------------------------------===//
-// Specialize setName to take care of symbol table majik
-void Constant::setName(const std::string &Name, SymbolTable *ST) {
- assert(ST && "Type::setName - Must provide symbol table argument!");
-
- if (Name.size()) ST->insert(Name, this);
-}
-
void Constant::destroyConstantImpl() {
// When a Constant is destroyed, there may be lingering
// references to the constant by other constants in the constant pool. These
Value *V = use_back();
#ifndef NDEBUG // Only in -g mode...
if (!isa<Constant>(V))
- std::cerr << "While deleting: " << *this
- << "\n\nUse still stuck around after Def is destroyed: "
- << *V << "\n\n";
+ DOUT << "While deleting: " << *this
+ << "\n\nUse still stuck around after Def is destroyed: "
+ << *V << "\n\n";
#endif
assert(isa<Constant>(V) && "References remain to Constant being destroyed");
- Constant *CPV = cast<Constant>(V);
- CPV->destroyConstant();
+ Constant *CV = cast<Constant>(V);
+ CV->destroyConstant();
// The constant should remove itself from our use list...
assert((use_empty() || use_back() != V) && "Constant not removed!");
delete this;
}
-// Static constructor to create a '0' constant of arbitrary type...
-Constant *Constant::getNullValue(const Type *Ty) {
- switch (Ty->getPrimitiveID()) {
- case Type::BoolTyID: {
- static Constant *NullBool = ConstantBool::get(false);
- return NullBool;
- }
- case Type::SByteTyID: {
- static Constant *NullSByte = ConstantSInt::get(Type::SByteTy, 0);
- return NullSByte;
- }
- case Type::UByteTyID: {
- static Constant *NullUByte = ConstantUInt::get(Type::UByteTy, 0);
- return NullUByte;
- }
- case Type::ShortTyID: {
- static Constant *NullShort = ConstantSInt::get(Type::ShortTy, 0);
- return NullShort;
- }
- case Type::UShortTyID: {
- static Constant *NullUShort = ConstantUInt::get(Type::UShortTy, 0);
- return NullUShort;
- }
- case Type::IntTyID: {
- static Constant *NullInt = ConstantSInt::get(Type::IntTy, 0);
- return NullInt;
- }
- case Type::UIntTyID: {
- static Constant *NullUInt = ConstantUInt::get(Type::UIntTy, 0);
- return NullUInt;
- }
- case Type::LongTyID: {
- static Constant *NullLong = ConstantSInt::get(Type::LongTy, 0);
- return NullLong;
- }
- case Type::ULongTyID: {
- static Constant *NullULong = ConstantUInt::get(Type::ULongTy, 0);
- return NullULong;
- }
+/// canTrap - Return true if evaluation of this constant could trap. This is
+/// true for things like constant expressions that could divide by zero.
+bool Constant::canTrap() const {
+ assert(getType()->isFirstClassType() && "Cannot evaluate aggregate vals!");
+ // The only thing that could possibly trap are constant exprs.
+ const ConstantExpr *CE = dyn_cast<ConstantExpr>(this);
+ if (!CE) return false;
+
+ // ConstantExpr traps if any operands can trap.
+ for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
+ if (getOperand(i)->canTrap())
+ return true;
- case Type::FloatTyID: {
- static Constant *NullFloat = ConstantFP::get(Type::FloatTy, 0);
- return NullFloat;
- }
- case Type::DoubleTyID: {
- static Constant *NullDouble = ConstantFP::get(Type::DoubleTy, 0);
- return NullDouble;
+ // Otherwise, only specific operations can trap.
+ switch (CE->getOpcode()) {
+ default:
+ return false;
+ case Instruction::UDiv:
+ case Instruction::SDiv:
+ case Instruction::FDiv:
+ case Instruction::URem:
+ case Instruction::SRem:
+ case Instruction::FRem:
+ // Div and rem can trap if the RHS is not known to be non-zero.
+ if (!isa<ConstantInt>(getOperand(1)) || getOperand(1)->isNullValue())
+ return true;
+ return false;
}
+}
- case Type::PointerTyID:
- return ConstantPointerNull::get(cast<PointerType>(Ty));
+/// ContaintsRelocations - Return true if the constant value contains
+/// relocations which cannot be resolved at compile time.
+bool Constant::ContainsRelocations() const {
+ if (isa<GlobalValue>(this))
+ return true;
+ for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
+ if (getOperand(i)->ContainsRelocations())
+ return true;
+ return false;
+}
+// Static constructor to create a '0' constant of arbitrary type...
+Constant *Constant::getNullValue(const Type *Ty) {
+ static uint64_t zero[2] = {0, 0};
+ switch (Ty->getTypeID()) {
+ case Type::IntegerTyID:
+ return ConstantInt::get(Ty, 0);
+ case Type::FloatTyID:
+ return ConstantFP::get(Ty, APFloat(APInt(32, 0)));
+ case Type::DoubleTyID:
+ return ConstantFP::get(Ty, APFloat(APInt(64, 0)));
+ case Type::X86_FP80TyID:
+ return ConstantFP::get(Ty, APFloat(APInt(80, 2, zero)));
+ case Type::FP128TyID:
+ case Type::PPC_FP128TyID:
+ return ConstantFP::get(Ty, APFloat(APInt(128, 2, zero)));
+ case Type::PointerTyID:
+ return ConstantPointerNull::get(cast<PointerType>(Ty));
case Type::StructTyID:
case Type::ArrayTyID:
+ case Type::VectorTyID:
return ConstantAggregateZero::get(Ty);
default:
- // Function, Type, Label, or Opaque type?
- assert(0 && "Cannot create a null constant of that type!");
+ // Function, Label, or Opaque type?
+ assert(!"Cannot create a null constant of that type!");
return 0;
}
}
-// Static constructor to create the maximum constant of an integral type...
-ConstantIntegral *ConstantIntegral::getMaxValue(const Type *Ty) {
- switch (Ty->getPrimitiveID()) {
- case Type::BoolTyID: return ConstantBool::True;
- case Type::SByteTyID:
- case Type::ShortTyID:
- case Type::IntTyID:
- case Type::LongTyID: {
- // Calculate 011111111111111...
- unsigned TypeBits = Ty->getPrimitiveSize()*8;
- int64_t Val = INT64_MAX; // All ones
- Val >>= 64-TypeBits; // Shift out unwanted 1 bits...
- return ConstantSInt::get(Ty, Val);
- }
+Constant *Constant::getAllOnesValue(const Type *Ty) {
+ if (const IntegerType* ITy = dyn_cast<IntegerType>(Ty))
+ return ConstantInt::get(APInt::getAllOnesValue(ITy->getBitWidth()));
+ return ConstantVector::getAllOnesValue(cast<VectorType>(Ty));
+}
- case Type::UByteTyID:
- case Type::UShortTyID:
- case Type::UIntTyID:
- case Type::ULongTyID: return getAllOnesValue(Ty);
+// Static constructor to create an integral constant with all bits set
+ConstantInt *ConstantInt::getAllOnesValue(const Type *Ty) {
+ if (const IntegerType* ITy = dyn_cast<IntegerType>(Ty))
+ return ConstantInt::get(APInt::getAllOnesValue(ITy->getBitWidth()));
+ return 0;
+}
- default: return 0;
- }
+/// @returns the value for a vector integer constant of the given type that
+/// has all its bits set to true.
+/// @brief Get the all ones value
+ConstantVector *ConstantVector::getAllOnesValue(const VectorType *Ty) {
+ std::vector<Constant*> Elts;
+ Elts.resize(Ty->getNumElements(),
+ ConstantInt::getAllOnesValue(Ty->getElementType()));
+ assert(Elts[0] && "Not a vector integer type!");
+ return cast<ConstantVector>(ConstantVector::get(Elts));
}
-// Static constructor to create the minimum constant for an integral type...
-ConstantIntegral *ConstantIntegral::getMinValue(const Type *Ty) {
- switch (Ty->getPrimitiveID()) {
- case Type::BoolTyID: return ConstantBool::False;
- case Type::SByteTyID:
- case Type::ShortTyID:
- case Type::IntTyID:
- case Type::LongTyID: {
- // Calculate 1111111111000000000000
- unsigned TypeBits = Ty->getPrimitiveSize()*8;
- int64_t Val = -1; // All ones
- Val <<= TypeBits-1; // Shift over to the right spot
- return ConstantSInt::get(Ty, Val);
- }
- case Type::UByteTyID:
- case Type::UShortTyID:
- case Type::UIntTyID:
- case Type::ULongTyID: return ConstantUInt::get(Ty, 0);
+//===----------------------------------------------------------------------===//
+// ConstantInt
+//===----------------------------------------------------------------------===//
- default: return 0;
- }
+ConstantInt::ConstantInt(const IntegerType *Ty, const APInt& V)
+ : Constant(Ty, ConstantIntVal, 0, 0), Val(V) {
+ assert(V.getBitWidth() == Ty->getBitWidth() && "Invalid constant for type");
}
-// Static constructor to create an integral constant with all bits set
-ConstantIntegral *ConstantIntegral::getAllOnesValue(const Type *Ty) {
- switch (Ty->getPrimitiveID()) {
- case Type::BoolTyID: return ConstantBool::True;
- case Type::SByteTyID:
- case Type::ShortTyID:
- case Type::IntTyID:
- case Type::LongTyID: return ConstantSInt::get(Ty, -1);
-
- case Type::UByteTyID:
- case Type::UShortTyID:
- case Type::UIntTyID:
- case Type::ULongTyID: {
- // Calculate ~0 of the right type...
- unsigned TypeBits = Ty->getPrimitiveSize()*8;
- uint64_t Val = ~0ULL; // All ones
- Val >>= 64-TypeBits; // Shift out unwanted 1 bits...
- return ConstantUInt::get(Ty, Val);
- }
- default: return 0;
+ConstantInt *ConstantInt::TheTrueVal = 0;
+ConstantInt *ConstantInt::TheFalseVal = 0;
+
+namespace llvm {
+ void CleanupTrueFalse(void *) {
+ ConstantInt::ResetTrueFalse();
}
}
-bool ConstantUInt::isAllOnesValue() const {
- unsigned TypeBits = getType()->getPrimitiveSize()*8;
- uint64_t Val = ~0ULL; // All ones
- Val >>= 64-TypeBits; // Shift out inappropriate bits
- return getValue() == Val;
+static ManagedCleanup<llvm::CleanupTrueFalse> TrueFalseCleanup;
+
+ConstantInt *ConstantInt::CreateTrueFalseVals(bool WhichOne) {
+ assert(TheTrueVal == 0 && TheFalseVal == 0);
+ TheTrueVal = get(Type::Int1Ty, 1);
+ TheFalseVal = get(Type::Int1Ty, 0);
+
+ // Ensure that llvm_shutdown nulls out TheTrueVal/TheFalseVal.
+ TrueFalseCleanup.Register();
+
+ return WhichOne ? TheTrueVal : TheFalseVal;
+}
+
+
+namespace {
+ struct DenseMapAPIntKeyInfo {
+ struct KeyTy {
+ APInt val;
+ const Type* type;
+ KeyTy(const APInt& V, const Type* Ty) : val(V), type(Ty) {}
+ KeyTy(const KeyTy& that) : val(that.val), type(that.type) {}
+ bool operator==(const KeyTy& that) const {
+ return type == that.type && this->val == that.val;
+ }
+ bool operator!=(const KeyTy& that) const {
+ return !this->operator==(that);
+ }
+ };
+ static inline KeyTy getEmptyKey() { return KeyTy(APInt(1,0), 0); }
+ static inline KeyTy getTombstoneKey() { return KeyTy(APInt(1,1), 0); }
+ static unsigned getHashValue(const KeyTy &Key) {
+ return DenseMapInfo<void*>::getHashValue(Key.type) ^
+ Key.val.getHashValue();
+ }
+ static bool isEqual(const KeyTy &LHS, const KeyTy &RHS) {
+ return LHS == RHS;
+ }
+ static bool isPod() { return false; }
+ };
+}
+
+
+typedef DenseMap<DenseMapAPIntKeyInfo::KeyTy, ConstantInt*,
+ DenseMapAPIntKeyInfo> IntMapTy;
+static ManagedStatic<IntMapTy> IntConstants;
+
+ConstantInt *ConstantInt::get(const Type *Ty, uint64_t V, bool isSigned) {
+ const IntegerType *ITy = cast<IntegerType>(Ty);
+ return get(APInt(ITy->getBitWidth(), V, isSigned));
}
+// Get a ConstantInt from an APInt. Note that the value stored in the DenseMap
+// as the key, is a DensMapAPIntKeyInfo::KeyTy which has provided the
+// operator== and operator!= to ensure that the DenseMap doesn't attempt to
+// compare APInt's of different widths, which would violate an APInt class
+// invariant which generates an assertion.
+ConstantInt *ConstantInt::get(const APInt& V) {
+ // Get the corresponding integer type for the bit width of the value.
+ const IntegerType *ITy = IntegerType::get(V.getBitWidth());
+ // get an existing value or the insertion position
+ DenseMapAPIntKeyInfo::KeyTy Key(V, ITy);
+ ConstantInt *&Slot = (*IntConstants)[Key];
+ // if it exists, return it.
+ if (Slot)
+ return Slot;
+ // otherwise create a new one, insert it, and return it.
+ return Slot = new ConstantInt(ITy, V);
+}
//===----------------------------------------------------------------------===//
-// ConstantXXX Classes
+// ConstantFP
//===----------------------------------------------------------------------===//
-//===----------------------------------------------------------------------===//
-// Normal Constructors
+ConstantFP::ConstantFP(const Type *Ty, const APFloat& V)
+ : Constant(Ty, ConstantFPVal, 0, 0), Val(V) {
+ // temporary
+ if (Ty==Type::FloatTy)
+ assert(&V.getSemantics()==&APFloat::IEEEsingle);
+ else if (Ty==Type::DoubleTy)
+ assert(&V.getSemantics()==&APFloat::IEEEdouble);
+ else if (Ty==Type::X86_FP80Ty)
+ assert(&V.getSemantics()==&APFloat::x87DoubleExtended);
+ else if (Ty==Type::FP128Ty)
+ assert(&V.getSemantics()==&APFloat::IEEEquad);
+ else
+ assert(0);
+}
-ConstantBool::ConstantBool(bool V) : ConstantIntegral(Type::BoolTy) {
- Val = V;
+bool ConstantFP::isNullValue() const {
+ return Val.isZero() && !Val.isNegative();
}
-ConstantInt::ConstantInt(const Type *Ty, uint64_t V) : ConstantIntegral(Ty) {
- Val.Unsigned = V;
+ConstantFP *ConstantFP::getNegativeZero(const Type *Ty) {
+ APFloat apf = cast <ConstantFP>(Constant::getNullValue(Ty))->getValueAPF();
+ apf.changeSign();
+ return ConstantFP::get(Ty, apf);
}
-ConstantSInt::ConstantSInt(const Type *Ty, int64_t V) : ConstantInt(Ty, V) {
- assert(Ty->isInteger() && Ty->isSigned() &&
- "Illegal type for unsigned integer constant!");
- assert(isValueValidForType(Ty, V) && "Value too large for type!");
+bool ConstantFP::isExactlyValue(const APFloat& V) const {
+ return Val.bitwiseIsEqual(V);
}
-ConstantUInt::ConstantUInt(const Type *Ty, uint64_t V) : ConstantInt(Ty, V) {
- assert(Ty->isInteger() && Ty->isUnsigned() &&
- "Illegal type for unsigned integer constant!");
- assert(isValueValidForType(Ty, V) && "Value too large for type!");
+namespace {
+ struct DenseMapAPFloatKeyInfo {
+ struct KeyTy {
+ APFloat val;
+ KeyTy(const APFloat& V) : val(V){}
+ KeyTy(const KeyTy& that) : val(that.val) {}
+ bool operator==(const KeyTy& that) const {
+ return this->val.bitwiseIsEqual(that.val);
+ }
+ bool operator!=(const KeyTy& that) const {
+ return !this->operator==(that);
+ }
+ };
+ static inline KeyTy getEmptyKey() {
+ return KeyTy(APFloat(APFloat::Bogus,1));
+ }
+ static inline KeyTy getTombstoneKey() {
+ return KeyTy(APFloat(APFloat::Bogus,2));
+ }
+ static unsigned getHashValue(const KeyTy &Key) {
+ return Key.val.getHashValue();
+ }
+ static bool isEqual(const KeyTy &LHS, const KeyTy &RHS) {
+ return LHS == RHS;
+ }
+ static bool isPod() { return false; }
+ };
}
-ConstantFP::ConstantFP(const Type *Ty, double V) : Constant(Ty) {
- assert(isValueValidForType(Ty, V) && "Value too large for type!");
- Val = V;
+//---- ConstantFP::get() implementation...
+//
+typedef DenseMap<DenseMapAPFloatKeyInfo::KeyTy, ConstantFP*,
+ DenseMapAPFloatKeyInfo> FPMapTy;
+
+static ManagedStatic<FPMapTy> FPConstants;
+
+ConstantFP *ConstantFP::get(const Type *Ty, const APFloat& V) {
+ // temporary
+ if (Ty==Type::FloatTy)
+ assert(&V.getSemantics()==&APFloat::IEEEsingle);
+ else if (Ty==Type::DoubleTy)
+ assert(&V.getSemantics()==&APFloat::IEEEdouble);
+ else if (Ty==Type::X86_FP80Ty)
+ assert(&V.getSemantics()==&APFloat::x87DoubleExtended);
+ else if (Ty==Type::FP128Ty)
+ assert(&V.getSemantics()==&APFloat::IEEEquad);
+ else
+ assert(0);
+
+ DenseMapAPFloatKeyInfo::KeyTy Key(V);
+ ConstantFP *&Slot = (*FPConstants)[Key];
+ if (Slot) return Slot;
+ return Slot = new ConstantFP(Ty, V);
}
+//===----------------------------------------------------------------------===//
+// ConstantXXX Classes
+//===----------------------------------------------------------------------===//
+
+
ConstantArray::ConstantArray(const ArrayType *T,
- const std::vector<Constant*> &V) : Constant(T) {
- Operands.reserve(V.size());
- for (unsigned i = 0, e = V.size(); i != e; ++i) {
- assert(V[i]->getType() == T->getElementType() ||
- (T->isAbstract() &&
- V[i]->getType()->getPrimitiveID() ==
- T->getElementType()->getPrimitiveID()));
- Operands.push_back(Use(V[i], this));
+ const std::vector<Constant*> &V)
+ : Constant(T, ConstantArrayVal, new Use[V.size()], V.size()) {
+ assert(V.size() == T->getNumElements() &&
+ "Invalid initializer vector for constant array");
+ Use *OL = OperandList;
+ for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
+ I != E; ++I, ++OL) {
+ Constant *C = *I;
+ assert((C->getType() == T->getElementType() ||
+ (T->isAbstract() &&
+ C->getType()->getTypeID() == T->getElementType()->getTypeID())) &&
+ "Initializer for array element doesn't match array element type!");
+ OL->init(C, this);
}
}
+ConstantArray::~ConstantArray() {
+ delete [] OperandList;
+}
+
ConstantStruct::ConstantStruct(const StructType *T,
- const std::vector<Constant*> &V) : Constant(T) {
+ const std::vector<Constant*> &V)
+ : Constant(T, ConstantStructVal, new Use[V.size()], V.size()) {
assert(V.size() == T->getNumElements() &&
"Invalid initializer vector for constant structure");
- Operands.reserve(V.size());
- for (unsigned i = 0, e = V.size(); i != e; ++i) {
- assert((V[i]->getType() == T->getElementType(i) ||
- ((T->getElementType(i)->isAbstract() ||
- V[i]->getType()->isAbstract()) &&
- T->getElementType(i)->getPrimitiveID() ==
- V[i]->getType()->getPrimitiveID())) &&
+ Use *OL = OperandList;
+ for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
+ I != E; ++I, ++OL) {
+ Constant *C = *I;
+ assert((C->getType() == T->getElementType(I-V.begin()) ||
+ ((T->getElementType(I-V.begin())->isAbstract() ||
+ C->getType()->isAbstract()) &&
+ T->getElementType(I-V.begin())->getTypeID() ==
+ C->getType()->getTypeID())) &&
"Initializer for struct element doesn't match struct element type!");
- Operands.push_back(Use(V[i], this));
+ OL->init(C, this);
}
}
-ConstantPointerRef::ConstantPointerRef(GlobalValue *GV)
- : Constant(GV->getType()) {
- Operands.reserve(1);
- Operands.push_back(Use(GV, this));
+ConstantStruct::~ConstantStruct() {
+ delete [] OperandList;
}
-ConstantExpr::ConstantExpr(unsigned Opcode, Constant *C, const Type *Ty)
- : Constant(Ty), iType(Opcode) {
- Operands.reserve(1);
- Operands.push_back(Use(C, this));
+
+ConstantVector::ConstantVector(const VectorType *T,
+ const std::vector<Constant*> &V)
+ : Constant(T, ConstantVectorVal, new Use[V.size()], V.size()) {
+ Use *OL = OperandList;
+ for (std::vector<Constant*>::const_iterator I = V.begin(), E = V.end();
+ I != E; ++I, ++OL) {
+ Constant *C = *I;
+ assert((C->getType() == T->getElementType() ||
+ (T->isAbstract() &&
+ C->getType()->getTypeID() == T->getElementType()->getTypeID())) &&
+ "Initializer for vector element doesn't match vector element type!");
+ OL->init(C, this);
+ }
}
-// Select instruction creation ctor
-ConstantExpr::ConstantExpr(Constant *C, Constant *V1, Constant *V2)
- : Constant(V1->getType()), iType(Instruction::Select) {
- Operands.reserve(3);
- Operands.push_back(Use(C, this));
- Operands.push_back(Use(V1, this));
- Operands.push_back(Use(V2, this));
+ConstantVector::~ConstantVector() {
+ delete [] OperandList;
}
+// We declare several classes private to this file, so use an anonymous
+// namespace
+namespace {
-static bool isSetCC(unsigned Opcode) {
- return Opcode == Instruction::SetEQ || Opcode == Instruction::SetNE ||
- Opcode == Instruction::SetLT || Opcode == Instruction::SetGT ||
- Opcode == Instruction::SetLE || Opcode == Instruction::SetGE;
-}
+/// UnaryConstantExpr - This class is private to Constants.cpp, and is used
+/// behind the scenes to implement unary constant exprs.
+class VISIBILITY_HIDDEN UnaryConstantExpr : public ConstantExpr {
+ Use Op;
+public:
+ UnaryConstantExpr(unsigned Opcode, Constant *C, const Type *Ty)
+ : ConstantExpr(Ty, Opcode, &Op, 1), Op(C, this) {}
+};
+
+/// BinaryConstantExpr - This class is private to Constants.cpp, and is used
+/// behind the scenes to implement binary constant exprs.
+class VISIBILITY_HIDDEN BinaryConstantExpr : public ConstantExpr {
+ Use Ops[2];
+public:
+ BinaryConstantExpr(unsigned Opcode, Constant *C1, Constant *C2)
+ : ConstantExpr(C1->getType(), Opcode, Ops, 2) {
+ Ops[0].init(C1, this);
+ Ops[1].init(C2, this);
+ }
+};
-ConstantExpr::ConstantExpr(unsigned Opcode, Constant *C1, Constant *C2)
- : Constant(isSetCC(Opcode) ? Type::BoolTy : C1->getType()), iType(Opcode) {
- Operands.reserve(2);
- Operands.push_back(Use(C1, this));
- Operands.push_back(Use(C2, this));
+/// SelectConstantExpr - This class is private to Constants.cpp, and is used
+/// behind the scenes to implement select constant exprs.
+class VISIBILITY_HIDDEN SelectConstantExpr : public ConstantExpr {
+ Use Ops[3];
+public:
+ SelectConstantExpr(Constant *C1, Constant *C2, Constant *C3)
+ : ConstantExpr(C2->getType(), Instruction::Select, Ops, 3) {
+ Ops[0].init(C1, this);
+ Ops[1].init(C2, this);
+ Ops[2].init(C3, this);
+ }
+};
+
+/// ExtractElementConstantExpr - This class is private to
+/// Constants.cpp, and is used behind the scenes to implement
+/// extractelement constant exprs.
+class VISIBILITY_HIDDEN ExtractElementConstantExpr : public ConstantExpr {
+ Use Ops[2];
+public:
+ ExtractElementConstantExpr(Constant *C1, Constant *C2)
+ : ConstantExpr(cast<VectorType>(C1->getType())->getElementType(),
+ Instruction::ExtractElement, Ops, 2) {
+ Ops[0].init(C1, this);
+ Ops[1].init(C2, this);
+ }
+};
+
+/// InsertElementConstantExpr - This class is private to
+/// Constants.cpp, and is used behind the scenes to implement
+/// insertelement constant exprs.
+class VISIBILITY_HIDDEN InsertElementConstantExpr : public ConstantExpr {
+ Use Ops[3];
+public:
+ InsertElementConstantExpr(Constant *C1, Constant *C2, Constant *C3)
+ : ConstantExpr(C1->getType(), Instruction::InsertElement,
+ Ops, 3) {
+ Ops[0].init(C1, this);
+ Ops[1].init(C2, this);
+ Ops[2].init(C3, this);
+ }
+};
+
+/// ShuffleVectorConstantExpr - This class is private to
+/// Constants.cpp, and is used behind the scenes to implement
+/// shufflevector constant exprs.
+class VISIBILITY_HIDDEN ShuffleVectorConstantExpr : public ConstantExpr {
+ Use Ops[3];
+public:
+ ShuffleVectorConstantExpr(Constant *C1, Constant *C2, Constant *C3)
+ : ConstantExpr(C1->getType(), Instruction::ShuffleVector,
+ Ops, 3) {
+ Ops[0].init(C1, this);
+ Ops[1].init(C2, this);
+ Ops[2].init(C3, this);
+ }
+};
+
+/// GetElementPtrConstantExpr - This class is private to Constants.cpp, and is
+/// used behind the scenes to implement getelementpr constant exprs.
+struct VISIBILITY_HIDDEN GetElementPtrConstantExpr : public ConstantExpr {
+ GetElementPtrConstantExpr(Constant *C, const std::vector<Constant*> &IdxList,
+ const Type *DestTy)
+ : ConstantExpr(DestTy, Instruction::GetElementPtr,
+ new Use[IdxList.size()+1], IdxList.size()+1) {
+ OperandList[0].init(C, this);
+ for (unsigned i = 0, E = IdxList.size(); i != E; ++i)
+ OperandList[i+1].init(IdxList[i], this);
+ }
+ ~GetElementPtrConstantExpr() {
+ delete [] OperandList;
+ }
+};
+
+// CompareConstantExpr - This class is private to Constants.cpp, and is used
+// behind the scenes to implement ICmp and FCmp constant expressions. This is
+// needed in order to store the predicate value for these instructions.
+struct VISIBILITY_HIDDEN CompareConstantExpr : public ConstantExpr {
+ unsigned short predicate;
+ Use Ops[2];
+ CompareConstantExpr(Instruction::OtherOps opc, unsigned short pred,
+ Constant* LHS, Constant* RHS)
+ : ConstantExpr(Type::Int1Ty, opc, Ops, 2), predicate(pred) {
+ OperandList[0].init(LHS, this);
+ OperandList[1].init(RHS, this);
+ }
+};
+
+} // end anonymous namespace
+
+
+// Utility function for determining if a ConstantExpr is a CastOp or not. This
+// can't be inline because we don't want to #include Instruction.h into
+// Constant.h
+bool ConstantExpr::isCast() const {
+ return Instruction::isCast(getOpcode());
}
-ConstantExpr::ConstantExpr(Constant *C, const std::vector<Constant*> &IdxList,
- const Type *DestTy)
- : Constant(DestTy), iType(Instruction::GetElementPtr) {
- Operands.reserve(1+IdxList.size());
- Operands.push_back(Use(C, this));
- for (unsigned i = 0, E = IdxList.size(); i != E; ++i)
- Operands.push_back(Use(IdxList[i], this));
+bool ConstantExpr::isCompare() const {
+ return getOpcode() == Instruction::ICmp || getOpcode() == Instruction::FCmp;
}
/// ConstantExpr::get* - Return some common constants without having to
/// specify the full Instruction::OPCODE identifier.
///
Constant *ConstantExpr::getNeg(Constant *C) {
- if (!C->getType()->isFloatingPoint())
- return get(Instruction::Sub, getNullValue(C->getType()), C);
- else
- return get(Instruction::Sub, ConstantFP::get(C->getType(), -0.0), C);
+ return get(Instruction::Sub,
+ ConstantExpr::getZeroValueForNegationExpr(C->getType()),
+ C);
}
Constant *ConstantExpr::getNot(Constant *C) {
- assert(isa<ConstantIntegral>(C) && "Cannot NOT a nonintegral type!");
+ assert(isa<ConstantInt>(C) && "Cannot NOT a nonintegral type!");
return get(Instruction::Xor, C,
- ConstantIntegral::getAllOnesValue(C->getType()));
+ ConstantInt::getAllOnesValue(C->getType()));
}
Constant *ConstantExpr::getAdd(Constant *C1, Constant *C2) {
return get(Instruction::Add, C1, C2);
Constant *ConstantExpr::getMul(Constant *C1, Constant *C2) {
return get(Instruction::Mul, C1, C2);
}
-Constant *ConstantExpr::getDiv(Constant *C1, Constant *C2) {
- return get(Instruction::Div, C1, C2);
+Constant *ConstantExpr::getUDiv(Constant *C1, Constant *C2) {
+ return get(Instruction::UDiv, C1, C2);
+}
+Constant *ConstantExpr::getSDiv(Constant *C1, Constant *C2) {
+ return get(Instruction::SDiv, C1, C2);
+}
+Constant *ConstantExpr::getFDiv(Constant *C1, Constant *C2) {
+ return get(Instruction::FDiv, C1, C2);
}
-Constant *ConstantExpr::getRem(Constant *C1, Constant *C2) {
- return get(Instruction::Rem, C1, C2);
+Constant *ConstantExpr::getURem(Constant *C1, Constant *C2) {
+ return get(Instruction::URem, C1, C2);
+}
+Constant *ConstantExpr::getSRem(Constant *C1, Constant *C2) {
+ return get(Instruction::SRem, C1, C2);
+}
+Constant *ConstantExpr::getFRem(Constant *C1, Constant *C2) {
+ return get(Instruction::FRem, C1, C2);
}
Constant *ConstantExpr::getAnd(Constant *C1, Constant *C2) {
return get(Instruction::And, C1, C2);
Constant *ConstantExpr::getXor(Constant *C1, Constant *C2) {
return get(Instruction::Xor, C1, C2);
}
-Constant *ConstantExpr::getSetEQ(Constant *C1, Constant *C2) {
- return get(Instruction::SetEQ, C1, C2);
-}
-Constant *ConstantExpr::getSetNE(Constant *C1, Constant *C2) {
- return get(Instruction::SetNE, C1, C2);
-}
-Constant *ConstantExpr::getSetLT(Constant *C1, Constant *C2) {
- return get(Instruction::SetLT, C1, C2);
-}
-Constant *ConstantExpr::getSetGT(Constant *C1, Constant *C2) {
- return get(Instruction::SetGT, C1, C2);
-}
-Constant *ConstantExpr::getSetLE(Constant *C1, Constant *C2) {
- return get(Instruction::SetLE, C1, C2);
-}
-Constant *ConstantExpr::getSetGE(Constant *C1, Constant *C2) {
- return get(Instruction::SetGE, C1, C2);
+unsigned ConstantExpr::getPredicate() const {
+ assert(getOpcode() == Instruction::FCmp || getOpcode() == Instruction::ICmp);
+ return dynamic_cast<const CompareConstantExpr*>(this)->predicate;
}
Constant *ConstantExpr::getShl(Constant *C1, Constant *C2) {
return get(Instruction::Shl, C1, C2);
}
-Constant *ConstantExpr::getShr(Constant *C1, Constant *C2) {
- return get(Instruction::Shr, C1, C2);
-}
-
-
-
-
-//===----------------------------------------------------------------------===//
-// classof implementations
-
-bool ConstantIntegral::classof(const Constant *CPV) {
- return CPV->getType()->isIntegral() && !isa<ConstantExpr>(CPV);
-}
-
-bool ConstantInt::classof(const Constant *CPV) {
- return CPV->getType()->isInteger() && !isa<ConstantExpr>(CPV);
-}
-bool ConstantSInt::classof(const Constant *CPV) {
- return CPV->getType()->isSigned() && !isa<ConstantExpr>(CPV);
-}
-bool ConstantUInt::classof(const Constant *CPV) {
- return CPV->getType()->isUnsigned() && !isa<ConstantExpr>(CPV);
-}
-bool ConstantFP::classof(const Constant *CPV) {
- const Type *Ty = CPV->getType();
- return ((Ty == Type::FloatTy || Ty == Type::DoubleTy) &&
- !isa<ConstantExpr>(CPV));
-}
-bool ConstantAggregateZero::classof(const Constant *CPV) {
- return (isa<ArrayType>(CPV->getType()) || isa<StructType>(CPV->getType())) &&
- CPV->isNullValue();
-}
-bool ConstantArray::classof(const Constant *CPV) {
- return isa<ArrayType>(CPV->getType()) && !CPV->isNullValue();
-}
-bool ConstantStruct::classof(const Constant *CPV) {
- return isa<StructType>(CPV->getType()) && !CPV->isNullValue();
-}
-
-bool ConstantPointerNull::classof(const Constant *CPV) {
- return isa<PointerType>(CPV->getType()) && !isa<ConstantExpr>(CPV) &&
- CPV->getNumOperands() == 0;
+Constant *ConstantExpr::getLShr(Constant *C1, Constant *C2) {
+ return get(Instruction::LShr, C1, C2);
}
-
-bool ConstantPointerRef::classof(const Constant *CPV) {
- return isa<PointerType>(CPV->getType()) && !isa<ConstantExpr>(CPV) &&
- CPV->getNumOperands() == 1;
+Constant *ConstantExpr::getAShr(Constant *C1, Constant *C2) {
+ return get(Instruction::AShr, C1, C2);
}
-
-
-//===----------------------------------------------------------------------===//
-// isValueValidForType implementations
-
-bool ConstantSInt::isValueValidForType(const Type *Ty, int64_t Val) {
- switch (Ty->getPrimitiveID()) {
+/// getWithOperandReplaced - Return a constant expression identical to this
+/// one, but with the specified operand set to the specified value.
+Constant *
+ConstantExpr::getWithOperandReplaced(unsigned OpNo, Constant *Op) const {
+ assert(OpNo < getNumOperands() && "Operand num is out of range!");
+ assert(Op->getType() == getOperand(OpNo)->getType() &&
+ "Replacing operand with value of different type!");
+ if (getOperand(OpNo) == Op)
+ return const_cast<ConstantExpr*>(this);
+
+ Constant *Op0, *Op1, *Op2;
+ switch (getOpcode()) {
+ case Instruction::Trunc:
+ case Instruction::ZExt:
+ case Instruction::SExt:
+ case Instruction::FPTrunc:
+ case Instruction::FPExt:
+ case Instruction::UIToFP:
+ case Instruction::SIToFP:
+ case Instruction::FPToUI:
+ case Instruction::FPToSI:
+ case Instruction::PtrToInt:
+ case Instruction::IntToPtr:
+ case Instruction::BitCast:
+ return ConstantExpr::getCast(getOpcode(), Op, getType());
+ case Instruction::Select:
+ Op0 = (OpNo == 0) ? Op : getOperand(0);
+ Op1 = (OpNo == 1) ? Op : getOperand(1);
+ Op2 = (OpNo == 2) ? Op : getOperand(2);
+ return ConstantExpr::getSelect(Op0, Op1, Op2);
+ case Instruction::InsertElement:
+ Op0 = (OpNo == 0) ? Op : getOperand(0);
+ Op1 = (OpNo == 1) ? Op : getOperand(1);
+ Op2 = (OpNo == 2) ? Op : getOperand(2);
+ return ConstantExpr::getInsertElement(Op0, Op1, Op2);
+ case Instruction::ExtractElement:
+ Op0 = (OpNo == 0) ? Op : getOperand(0);
+ Op1 = (OpNo == 1) ? Op : getOperand(1);
+ return ConstantExpr::getExtractElement(Op0, Op1);
+ case Instruction::ShuffleVector:
+ Op0 = (OpNo == 0) ? Op : getOperand(0);
+ Op1 = (OpNo == 1) ? Op : getOperand(1);
+ Op2 = (OpNo == 2) ? Op : getOperand(2);
+ return ConstantExpr::getShuffleVector(Op0, Op1, Op2);
+ case Instruction::GetElementPtr: {
+ SmallVector<Constant*, 8> Ops;
+ Ops.resize(getNumOperands());
+ for (unsigned i = 1, e = getNumOperands(); i != e; ++i)
+ Ops[i] = getOperand(i);
+ if (OpNo == 0)
+ return ConstantExpr::getGetElementPtr(Op, &Ops[0], Ops.size());
+ Ops[OpNo-1] = Op;
+ return ConstantExpr::getGetElementPtr(getOperand(0), &Ops[0], Ops.size());
+ }
default:
- return false; // These can't be represented as integers!!!
-
- // Signed types...
- case Type::SByteTyID:
- return (Val <= INT8_MAX && Val >= INT8_MIN);
- case Type::ShortTyID:
- return (Val <= INT16_MAX && Val >= INT16_MIN);
- case Type::IntTyID:
- return (Val <= INT32_MAX && Val >= INT32_MIN);
- case Type::LongTyID:
- return true; // This is the largest type...
+ assert(getNumOperands() == 2 && "Must be binary operator?");
+ Op0 = (OpNo == 0) ? Op : getOperand(0);
+ Op1 = (OpNo == 1) ? Op : getOperand(1);
+ return ConstantExpr::get(getOpcode(), Op0, Op1);
}
- assert(0 && "WTF?");
- return false;
}
-bool ConstantUInt::isValueValidForType(const Type *Ty, uint64_t Val) {
- switch (Ty->getPrimitiveID()) {
+/// getWithOperands - This returns the current constant expression with the
+/// operands replaced with the specified values. The specified operands must
+/// match count and type with the existing ones.
+Constant *ConstantExpr::
+getWithOperands(const std::vector<Constant*> &Ops) const {
+ assert(Ops.size() == getNumOperands() && "Operand count mismatch!");
+ bool AnyChange = false;
+ for (unsigned i = 0, e = Ops.size(); i != e; ++i) {
+ assert(Ops[i]->getType() == getOperand(i)->getType() &&
+ "Operand type mismatch!");
+ AnyChange |= Ops[i] != getOperand(i);
+ }
+ if (!AnyChange) // No operands changed, return self.
+ return const_cast<ConstantExpr*>(this);
+
+ switch (getOpcode()) {
+ case Instruction::Trunc:
+ case Instruction::ZExt:
+ case Instruction::SExt:
+ case Instruction::FPTrunc:
+ case Instruction::FPExt:
+ case Instruction::UIToFP:
+ case Instruction::SIToFP:
+ case Instruction::FPToUI:
+ case Instruction::FPToSI:
+ case Instruction::PtrToInt:
+ case Instruction::IntToPtr:
+ case Instruction::BitCast:
+ return ConstantExpr::getCast(getOpcode(), Ops[0], getType());
+ case Instruction::Select:
+ return ConstantExpr::getSelect(Ops[0], Ops[1], Ops[2]);
+ case Instruction::InsertElement:
+ return ConstantExpr::getInsertElement(Ops[0], Ops[1], Ops[2]);
+ case Instruction::ExtractElement:
+ return ConstantExpr::getExtractElement(Ops[0], Ops[1]);
+ case Instruction::ShuffleVector:
+ return ConstantExpr::getShuffleVector(Ops[0], Ops[1], Ops[2]);
+ case Instruction::GetElementPtr:
+ return ConstantExpr::getGetElementPtr(Ops[0], &Ops[1], Ops.size()-1);
+ case Instruction::ICmp:
+ case Instruction::FCmp:
+ return ConstantExpr::getCompare(getPredicate(), Ops[0], Ops[1]);
default:
- return false; // These can't be represented as integers!!!
-
- // Unsigned types...
- case Type::UByteTyID:
- return (Val <= UINT8_MAX);
- case Type::UShortTyID:
- return (Val <= UINT16_MAX);
- case Type::UIntTyID:
- return (Val <= UINT32_MAX);
- case Type::ULongTyID:
- return true; // This is the largest type...
+ assert(getNumOperands() == 2 && "Must be binary operator?");
+ return ConstantExpr::get(getOpcode(), Ops[0], Ops[1]);
}
- assert(0 && "WTF?");
- return false;
}
-bool ConstantFP::isValueValidForType(const Type *Ty, double Val) {
- switch (Ty->getPrimitiveID()) {
+
+//===----------------------------------------------------------------------===//
+// isValueValidForType implementations
+
+bool ConstantInt::isValueValidForType(const Type *Ty, uint64_t Val) {
+ unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth(); // assert okay
+ if (Ty == Type::Int1Ty)
+ return Val == 0 || Val == 1;
+ if (NumBits >= 64)
+ return true; // always true, has to fit in largest type
+ uint64_t Max = (1ll << NumBits) - 1;
+ return Val <= Max;
+}
+
+bool ConstantInt::isValueValidForType(const Type *Ty, int64_t Val) {
+ unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth(); // assert okay
+ if (Ty == Type::Int1Ty)
+ return Val == 0 || Val == 1 || Val == -1;
+ if (NumBits >= 64)
+ return true; // always true, has to fit in largest type
+ int64_t Min = -(1ll << (NumBits-1));
+ int64_t Max = (1ll << (NumBits-1)) - 1;
+ return (Val >= Min && Val <= Max);
+}
+
+bool ConstantFP::isValueValidForType(const Type *Ty, const APFloat& Val) {
+ // convert modifies in place, so make a copy.
+ APFloat Val2 = APFloat(Val);
+ switch (Ty->getTypeID()) {
default:
return false; // These can't be represented as floating point!
- // TODO: Figure out how to test if a double can be cast to a float!
+ // FIXME rounding mode needs to be more flexible
case Type::FloatTyID:
+ return &Val2.getSemantics() == &APFloat::IEEEsingle ||
+ Val2.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven) ==
+ APFloat::opOK;
case Type::DoubleTyID:
- return true; // This is the largest type...
- }
-};
-
-//===----------------------------------------------------------------------===//
-// replaceUsesOfWithOnConstant implementations
-
-void ConstantArray::replaceUsesOfWithOnConstant(Value *From, Value *To,
- bool DisableChecking) {
- assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
-
- std::vector<Constant*> Values;
- Values.reserve(getValues().size()); // Build replacement array...
- for (unsigned i = 0, e = getValues().size(); i != e; ++i) {
- Constant *Val = cast<Constant>(getValues()[i]);
- if (Val == From) Val = cast<Constant>(To);
- Values.push_back(Val);
- }
-
- Constant *Replacement = ConstantArray::get(getType(), Values);
- assert(Replacement != this && "I didn't contain From!");
-
- // Everyone using this now uses the replacement...
- if (DisableChecking)
- uncheckedReplaceAllUsesWith(Replacement);
- else
- replaceAllUsesWith(Replacement);
-
- // Delete the old constant!
- destroyConstant();
-}
-
-void ConstantStruct::replaceUsesOfWithOnConstant(Value *From, Value *To,
- bool DisableChecking) {
- assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
-
- std::vector<Constant*> Values;
- Values.reserve(getValues().size());
- for (unsigned i = 0, e = getValues().size(); i != e; ++i) {
- Constant *Val = cast<Constant>(getValues()[i]);
- if (Val == From) Val = cast<Constant>(To);
- Values.push_back(Val);
- }
-
- Constant *Replacement = ConstantStruct::get(getType(), Values);
- assert(Replacement != this && "I didn't contain From!");
-
- // Everyone using this now uses the replacement...
- if (DisableChecking)
- uncheckedReplaceAllUsesWith(Replacement);
- else
- replaceAllUsesWith(Replacement);
-
- // Delete the old constant!
- destroyConstant();
-}
-
-void ConstantPointerRef::replaceUsesOfWithOnConstant(Value *From, Value *To,
- bool DisableChecking) {
- if (isa<GlobalValue>(To)) {
- assert(From == getOperand(0) && "Doesn't contain from!");
- ConstantPointerRef *Replacement =
- ConstantPointerRef::get(cast<GlobalValue>(To));
-
- // Everyone using this now uses the replacement...
- if (DisableChecking)
- uncheckedReplaceAllUsesWith(Replacement);
- else
- replaceAllUsesWith(Replacement);
-
- } else {
- // Just replace ourselves with the To value specified.
- if (DisableChecking)
- uncheckedReplaceAllUsesWith(To);
- else
- replaceAllUsesWith(To);
- }
-
- // Delete the old constant!
- destroyConstant();
-}
-
-void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *ToV,
- bool DisableChecking) {
- assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
- Constant *To = cast<Constant>(ToV);
-
- Constant *Replacement = 0;
- if (getOpcode() == Instruction::GetElementPtr) {
- std::vector<Constant*> Indices;
- Constant *Pointer = getOperand(0);
- Indices.reserve(getNumOperands()-1);
- if (Pointer == From) Pointer = To;
-
- for (unsigned i = 1, e = getNumOperands(); i != e; ++i) {
- Constant *Val = getOperand(i);
- if (Val == From) Val = To;
- Indices.push_back(Val);
- }
- Replacement = ConstantExpr::getGetElementPtr(Pointer, Indices);
- } else if (getOpcode() == Instruction::Cast) {
- assert(getOperand(0) == From && "Cast only has one use!");
- Replacement = ConstantExpr::getCast(To, getType());
- } else if (getOpcode() == Instruction::Select) {
- Constant *C1 = getOperand(0);
- Constant *C2 = getOperand(1);
- Constant *C3 = getOperand(2);
- if (C1 == From) C1 = To;
- if (C2 == From) C2 = To;
- if (C3 == From) C3 = To;
- Replacement = ConstantExpr::getSelect(C1, C2, C3);
- } else if (getNumOperands() == 2) {
- Constant *C1 = getOperand(0);
- Constant *C2 = getOperand(1);
- if (C1 == From) C1 = To;
- if (C2 == From) C2 = To;
- Replacement = ConstantExpr::get(getOpcode(), C1, C2);
- } else {
- assert(0 && "Unknown ConstantExpr type!");
- return;
+ return &Val2.getSemantics() == &APFloat::IEEEsingle ||
+ &Val2.getSemantics() == &APFloat::IEEEdouble ||
+ Val2.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven) ==
+ APFloat::opOK;
+ case Type::X86_FP80TyID:
+ return &Val2.getSemantics() == &APFloat::IEEEsingle ||
+ &Val2.getSemantics() == &APFloat::IEEEdouble ||
+ &Val2.getSemantics() == &APFloat::x87DoubleExtended;
+ case Type::FP128TyID:
+ return &Val2.getSemantics() == &APFloat::IEEEsingle ||
+ &Val2.getSemantics() == &APFloat::IEEEdouble ||
+ &Val2.getSemantics() == &APFloat::IEEEquad;
}
-
- assert(Replacement != this && "I didn't contain From!");
-
- // Everyone using this now uses the replacement...
- if (DisableChecking)
- uncheckedReplaceAllUsesWith(Replacement);
- else
- replaceAllUsesWith(Replacement);
-
- // Delete the old constant!
- destroyConstant();
}
//===----------------------------------------------------------------------===//
//
namespace llvm {
template<class ConstantClass, class TypeClass, class ValType>
- struct ConstantCreator {
+ struct VISIBILITY_HIDDEN ConstantCreator {
static ConstantClass *create(const TypeClass *Ty, const ValType &V) {
return new ConstantClass(Ty, V);
}
};
-
+
template<class ConstantClass, class TypeClass>
- struct ConvertConstantType {
+ struct VISIBILITY_HIDDEN ConvertConstantType {
static void convert(ConstantClass *OldC, const TypeClass *NewTy) {
assert(0 && "This type cannot be converted!\n");
abort();
}
};
-}
-namespace {
- template<class ValType, class TypeClass, class ConstantClass>
- class ValueMap : public AbstractTypeUser {
- typedef std::pair<const TypeClass*, ValType> MapKey;
- typedef std::map<MapKey, ConstantClass *> MapTy;
- typedef typename MapTy::iterator MapIterator;
+ template<class ValType, class TypeClass, class ConstantClass,
+ bool HasLargeKey = false /*true for arrays and structs*/ >
+ class VISIBILITY_HIDDEN ValueMap : public AbstractTypeUser {
+ public:
+ typedef std::pair<const Type*, ValType> MapKey;
+ typedef std::map<MapKey, Constant *> MapTy;
+ typedef std::map<Constant*, typename MapTy::iterator> InverseMapTy;
+ typedef std::map<const Type*, typename MapTy::iterator> AbstractTypeMapTy;
+ private:
+ /// Map - This is the main map from the element descriptor to the Constants.
+ /// This is the primary way we avoid creating two of the same shape
+ /// constant.
MapTy Map;
-
- typedef std::map<const TypeClass*, MapIterator> AbstractTypeMapTy;
+
+ /// InverseMap - If "HasLargeKey" is true, this contains an inverse mapping
+ /// from the constants to their element in Map. This is important for
+ /// removal of constants from the array, which would otherwise have to scan
+ /// through the map with very large keys.
+ InverseMapTy InverseMap;
+
+ /// AbstractTypeMap - Map for abstract type constants.
+ ///
AbstractTypeMapTy AbstractTypeMap;
+
public:
- // getOrCreate - Return the specified constant from the map, creating it if
- // necessary.
- ConstantClass *getOrCreate(const TypeClass *Ty, const ValType &V) {
+ typename MapTy::iterator map_end() { return Map.end(); }
+
+ /// InsertOrGetItem - Return an iterator for the specified element.
+ /// If the element exists in the map, the returned iterator points to the
+ /// entry and Exists=true. If not, the iterator points to the newly
+ /// inserted entry and returns Exists=false. Newly inserted entries have
+ /// I->second == 0, and should be filled in.
+ typename MapTy::iterator InsertOrGetItem(std::pair<MapKey, Constant *>
+ &InsertVal,
+ bool &Exists) {
+ std::pair<typename MapTy::iterator, bool> IP = Map.insert(InsertVal);
+ Exists = !IP.second;
+ return IP.first;
+ }
+
+private:
+ typename MapTy::iterator FindExistingElement(ConstantClass *CP) {
+ if (HasLargeKey) {
+ typename InverseMapTy::iterator IMI = InverseMap.find(CP);
+ assert(IMI != InverseMap.end() && IMI->second != Map.end() &&
+ IMI->second->second == CP &&
+ "InverseMap corrupt!");
+ return IMI->second;
+ }
+
+ typename MapTy::iterator I =
+ Map.find(MapKey((TypeClass*)CP->getRawType(), getValType(CP)));
+ if (I == Map.end() || I->second != CP) {
+ // FIXME: This should not use a linear scan. If this gets to be a
+ // performance problem, someone should look at this.
+ for (I = Map.begin(); I != Map.end() && I->second != CP; ++I)
+ /* empty */;
+ }
+ return I;
+ }
+public:
+
+ /// getOrCreate - Return the specified constant from the map, creating it if
+ /// necessary.
+ ConstantClass *getOrCreate(const TypeClass *Ty, const ValType &V) {
MapKey Lookup(Ty, V);
- MapIterator I = Map.lower_bound(Lookup);
+ typename MapTy::iterator I = Map.lower_bound(Lookup);
+ // Is it in the map?
if (I != Map.end() && I->first == Lookup)
- return I->second; // Is it in the map?
+ return static_cast<ConstantClass *>(I->second);
// If no preexisting value, create one now...
ConstantClass *Result =
ConstantCreator<ConstantClass,TypeClass,ValType>::create(Ty, V);
-
/// FIXME: why does this assert fail when loading 176.gcc?
//assert(Result->getType() == Ty && "Type specified is not correct!");
I = Map.insert(I, std::make_pair(MapKey(Ty, V), Result));
+ if (HasLargeKey) // Remember the reverse mapping if needed.
+ InverseMap.insert(std::make_pair(Result, I));
+
// If the type of the constant is abstract, make sure that an entry exists
// for it in the AbstractTypeMap.
if (Ty->isAbstract()) {
}
return Result;
}
-
+
void remove(ConstantClass *CP) {
- // FIXME: This should not use a linear scan. If this gets to be a
- // performance problem, someone should look at this.
- MapIterator I = Map.begin();
- for (MapIterator E = Map.end(); I != E && I->second != CP; ++I)
- /* empty */;
-
+ typename MapTy::iterator I = FindExistingElement(CP);
assert(I != Map.end() && "Constant not found in constant table!");
+ assert(I->second == CP && "Didn't find correct element?");
+ if (HasLargeKey) // Remember the reverse mapping if needed.
+ InverseMap.erase(CP);
+
// Now that we found the entry, make sure this isn't the entry that
// the AbstractTypeMap points to.
- const TypeClass *Ty = I->first.first;
+ const TypeClass *Ty = static_cast<const TypeClass *>(I->first.first);
if (Ty->isAbstract()) {
assert(AbstractTypeMap.count(Ty) &&
"Abstract type not in AbstractTypeMap?");
- MapIterator &ATMEntryIt = AbstractTypeMap[Ty];
+ typename MapTy::iterator &ATMEntryIt = AbstractTypeMap[Ty];
if (ATMEntryIt == I) {
// Yes, we are removing the representative entry for this type.
// See if there are any other entries of the same type.
- MapIterator TmpIt = ATMEntryIt;
-
+ typename MapTy::iterator TmpIt = ATMEntryIt;
+
// First check the entry before this one...
if (TmpIt != Map.begin()) {
--TmpIt;
if (TmpIt->first.first != Ty) // Not the same type, move back...
++TmpIt;
}
-
+
// If we didn't find the same type, try to move forward...
if (TmpIt == ATMEntryIt) {
++TmpIt;
}
}
}
-
+
Map.erase(I);
}
+
+ /// MoveConstantToNewSlot - If we are about to change C to be the element
+ /// specified by I, update our internal data structures to reflect this
+ /// fact.
+ void MoveConstantToNewSlot(ConstantClass *C, typename MapTy::iterator I) {
+ // First, remove the old location of the specified constant in the map.
+ typename MapTy::iterator OldI = FindExistingElement(C);
+ assert(OldI != Map.end() && "Constant not found in constant table!");
+ assert(OldI->second == C && "Didn't find correct element?");
+
+ // If this constant is the representative element for its abstract type,
+ // update the AbstractTypeMap so that the representative element is I.
+ if (C->getType()->isAbstract()) {
+ typename AbstractTypeMapTy::iterator ATI =
+ AbstractTypeMap.find(C->getType());
+ assert(ATI != AbstractTypeMap.end() &&
+ "Abstract type not in AbstractTypeMap?");
+ if (ATI->second == OldI)
+ ATI->second = I;
+ }
+
+ // Remove the old entry from the map.
+ Map.erase(OldI);
+
+ // Update the inverse map so that we know that this constant is now
+ // located at descriptor I.
+ if (HasLargeKey) {
+ assert(I->second == C && "Bad inversemap entry!");
+ InverseMap[C] = I;
+ }
+ }
+
void refineAbstractType(const DerivedType *OldTy, const Type *NewTy) {
- typename AbstractTypeMapTy::iterator I =
- AbstractTypeMap.find(cast<TypeClass>(OldTy));
+ typename AbstractTypeMapTy::iterator I =
+ AbstractTypeMap.find(cast<Type>(OldTy));
assert(I != AbstractTypeMap.end() &&
"Abstract type not in AbstractTypeMap?");
// eliminated eventually.
do {
ConvertConstantType<ConstantClass,
- TypeClass>::convert(I->second->second,
+ TypeClass>::convert(
+ static_cast<ConstantClass *>(I->second->second),
cast<TypeClass>(NewTy));
- I = AbstractTypeMap.find(cast<TypeClass>(OldTy));
+ I = AbstractTypeMap.find(cast<Type>(OldTy));
} while (I != AbstractTypeMap.end());
}
}
void dump() const {
- std::cerr << "Constant.cpp: ValueMap\n";
- }
- };
-}
-
-
-
-//---- ConstantUInt::get() and ConstantSInt::get() implementations...
-//
-static ValueMap< int64_t, Type, ConstantSInt> SIntConstants;
-static ValueMap<uint64_t, Type, ConstantUInt> UIntConstants;
-
-ConstantSInt *ConstantSInt::get(const Type *Ty, int64_t V) {
- return SIntConstants.getOrCreate(Ty, V);
-}
-
-ConstantUInt *ConstantUInt::get(const Type *Ty, uint64_t V) {
- return UIntConstants.getOrCreate(Ty, V);
-}
-
-ConstantInt *ConstantInt::get(const Type *Ty, unsigned char V) {
- assert(V <= 127 && "Can only be used with very small positive constants!");
- if (Ty->isSigned()) return ConstantSInt::get(Ty, V);
- return ConstantUInt::get(Ty, V);
-}
-
-//---- ConstantFP::get() implementation...
-//
-namespace llvm {
- template<>
- struct ConstantCreator<ConstantFP, Type, uint64_t> {
- static ConstantFP *create(const Type *Ty, uint64_t V) {
- assert(Ty == Type::DoubleTy);
- union {
- double F;
- uint64_t I;
- } T;
- T.I = V;
- return new ConstantFP(Ty, T.F);
- }
- };
- template<>
- struct ConstantCreator<ConstantFP, Type, uint32_t> {
- static ConstantFP *create(const Type *Ty, uint32_t V) {
- assert(Ty == Type::FloatTy);
- union {
- float F;
- uint32_t I;
- } T;
- T.I = V;
- return new ConstantFP(Ty, T.F);
+ DOUT << "Constant.cpp: ValueMap\n";
}
};
}
-static ValueMap<uint64_t, Type, ConstantFP> DoubleConstants;
-static ValueMap<uint32_t, Type, ConstantFP> FloatConstants;
-ConstantFP *ConstantFP::get(const Type *Ty, double V) {
- if (Ty == Type::FloatTy) {
- // Force the value through memory to normalize it.
- union {
- float F;
- uint32_t I;
- } T;
- T.F = (float)V;
- return FloatConstants.getOrCreate(Ty, T.I);
- } else {
- assert(Ty == Type::DoubleTy);
- union {
- double F;
- uint64_t I;
- } T;
- T.F = V;
- return DoubleConstants.getOrCreate(Ty, T.I);
- }
-}
//---- ConstantAggregateZero::get() implementation...
//
};
}
-static ValueMap<char, Type, ConstantAggregateZero> AggZeroConstants;
+static ManagedStatic<ValueMap<char, Type,
+ ConstantAggregateZero> > AggZeroConstants;
+
+static char getValType(ConstantAggregateZero *CPZ) { return 0; }
Constant *ConstantAggregateZero::get(const Type *Ty) {
- return AggZeroConstants.getOrCreate(Ty, 0);
+ assert((isa<StructType>(Ty) || isa<ArrayType>(Ty) || isa<VectorType>(Ty)) &&
+ "Cannot create an aggregate zero of non-aggregate type!");
+ return AggZeroConstants->getOrCreate(Ty, 0);
}
// destroyConstant - Remove the constant from the constant table...
//
void ConstantAggregateZero::destroyConstant() {
- AggZeroConstants.remove(this);
+ AggZeroConstants->remove(this);
destroyConstantImpl();
}
-void ConstantAggregateZero::replaceUsesOfWithOnConstant(Value *From, Value *To,
- bool DisableChecking) {
- assert(0 && "No uses!");
- abort();
-}
-
-
-
//---- ConstantArray::get() implementation...
//
namespace llvm {
};
}
-static ValueMap<std::vector<Constant*>, ArrayType,
- ConstantArray> ArrayConstants;
+static std::vector<Constant*> getValType(ConstantArray *CA) {
+ std::vector<Constant*> Elements;
+ Elements.reserve(CA->getNumOperands());
+ for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i)
+ Elements.push_back(cast<Constant>(CA->getOperand(i)));
+ return Elements;
+}
+
+typedef ValueMap<std::vector<Constant*>, ArrayType,
+ ConstantArray, true /*largekey*/> ArrayConstantsTy;
+static ManagedStatic<ArrayConstantsTy> ArrayConstants;
Constant *ConstantArray::get(const ArrayType *Ty,
const std::vector<Constant*> &V) {
if (!V.empty()) {
Constant *C = V[0];
if (!C->isNullValue())
- return ArrayConstants.getOrCreate(Ty, V);
+ return ArrayConstants->getOrCreate(Ty, V);
for (unsigned i = 1, e = V.size(); i != e; ++i)
if (V[i] != C)
- return ArrayConstants.getOrCreate(Ty, V);
+ return ArrayConstants->getOrCreate(Ty, V);
}
return ConstantAggregateZero::get(Ty);
}
// destroyConstant - Remove the constant from the constant table...
//
void ConstantArray::destroyConstant() {
- ArrayConstants.remove(this);
+ ArrayConstants->remove(this);
destroyConstantImpl();
}
-// ConstantArray::get(const string&) - Return an array that is initialized to
-// contain the specified string. A null terminator is added to the specified
-// string so that it may be used in a natural way...
-//
-Constant *ConstantArray::get(const std::string &Str) {
+/// ConstantArray::get(const string&) - Return an array that is initialized to
+/// contain the specified string. If length is zero then a null terminator is
+/// added to the specified string so that it may be used in a natural way.
+/// Otherwise, the length parameter specifies how much of the string to use
+/// and it won't be null terminated.
+///
+Constant *ConstantArray::get(const std::string &Str, bool AddNull) {
std::vector<Constant*> ElementVals;
-
for (unsigned i = 0; i < Str.length(); ++i)
- ElementVals.push_back(ConstantSInt::get(Type::SByteTy, Str[i]));
+ ElementVals.push_back(ConstantInt::get(Type::Int8Ty, Str[i]));
// Add a null terminator to the string...
- ElementVals.push_back(ConstantSInt::get(Type::SByteTy, 0));
+ if (AddNull) {
+ ElementVals.push_back(ConstantInt::get(Type::Int8Ty, 0));
+ }
- ArrayType *ATy = ArrayType::get(Type::SByteTy, Str.length()+1);
+ ArrayType *ATy = ArrayType::get(Type::Int8Ty, ElementVals.size());
return ConstantArray::get(ATy, ElementVals);
}
-/// isString - This method returns true if the array is an array of sbyte or
-/// ubyte, and if the elements of the array are all ConstantInt's.
+/// isString - This method returns true if the array is an array of i8, and
+/// if the elements of the array are all ConstantInt's.
bool ConstantArray::isString() const {
- // Check the element type for sbyte or ubyte...
- if (getType()->getElementType() != Type::UByteTy &&
- getType()->getElementType() != Type::SByteTy)
+ // Check the element type for i8...
+ if (getType()->getElementType() != Type::Int8Ty)
return false;
// Check the elements to make sure they are all integers, not constant
// expressions.
return true;
}
-// getAsString - If the sub-element type of this array is either sbyte or ubyte,
+/// isCString - This method returns true if the array is a string (see
+/// isString) and it ends in a null byte \0 and does not contains any other
+/// null bytes except its terminator.
+bool ConstantArray::isCString() const {
+ // Check the element type for i8...
+ if (getType()->getElementType() != Type::Int8Ty)
+ return false;
+ Constant *Zero = Constant::getNullValue(getOperand(0)->getType());
+ // Last element must be a null.
+ if (getOperand(getNumOperands()-1) != Zero)
+ return false;
+ // Other elements must be non-null integers.
+ for (unsigned i = 0, e = getNumOperands()-1; i != e; ++i) {
+ if (!isa<ConstantInt>(getOperand(i)))
+ return false;
+ if (getOperand(i) == Zero)
+ return false;
+ }
+ return true;
+}
+
+
+// getAsString - If the sub-element type of this array is i8
// then this method converts the array to an std::string and returns it.
// Otherwise, it asserts out.
//
assert(isString() && "Not a string!");
std::string Result;
for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
- Result += (char)cast<ConstantInt>(getOperand(i))->getRawValue();
+ Result += (char)cast<ConstantInt>(getOperand(i))->getZExtValue();
return Result;
}
C.push_back(cast<Constant>(OldC->getOperand(i)));
Constant *New = ConstantStruct::get(NewTy, C);
assert(New != OldC && "Didn't replace constant??");
-
+
OldC->uncheckedReplaceAllUsesWith(New);
OldC->destroyConstant(); // This constant is now dead, destroy it.
}
};
}
-static ValueMap<std::vector<Constant*>, StructType,
- ConstantStruct> StructConstants;
+typedef ValueMap<std::vector<Constant*>, StructType,
+ ConstantStruct, true /*largekey*/> StructConstantsTy;
+static ManagedStatic<StructConstantsTy> StructConstants;
+
+static std::vector<Constant*> getValType(ConstantStruct *CS) {
+ std::vector<Constant*> Elements;
+ Elements.reserve(CS->getNumOperands());
+ for (unsigned i = 0, e = CS->getNumOperands(); i != e; ++i)
+ Elements.push_back(cast<Constant>(CS->getOperand(i)));
+ return Elements;
+}
Constant *ConstantStruct::get(const StructType *Ty,
const std::vector<Constant*> &V) {
// Create a ConstantAggregateZero value if all elements are zeros...
for (unsigned i = 0, e = V.size(); i != e; ++i)
if (!V[i]->isNullValue())
- return StructConstants.getOrCreate(Ty, V);
+ return StructConstants->getOrCreate(Ty, V);
return ConstantAggregateZero::get(Ty);
}
+Constant *ConstantStruct::get(const std::vector<Constant*> &V, bool packed) {
+ std::vector<const Type*> StructEls;
+ StructEls.reserve(V.size());
+ for (unsigned i = 0, e = V.size(); i != e; ++i)
+ StructEls.push_back(V[i]->getType());
+ return get(StructType::get(StructEls, packed), V);
+}
+
// destroyConstant - Remove the constant from the constant table...
//
void ConstantStruct::destroyConstant() {
- StructConstants.remove(this);
+ StructConstants->remove(this);
+ destroyConstantImpl();
+}
+
+//---- ConstantVector::get() implementation...
+//
+namespace llvm {
+ template<>
+ struct ConvertConstantType<ConstantVector, VectorType> {
+ static void convert(ConstantVector *OldC, const VectorType *NewTy) {
+ // Make everyone now use a constant of the new type...
+ std::vector<Constant*> C;
+ for (unsigned i = 0, e = OldC->getNumOperands(); i != e; ++i)
+ C.push_back(cast<Constant>(OldC->getOperand(i)));
+ Constant *New = ConstantVector::get(NewTy, C);
+ assert(New != OldC && "Didn't replace constant??");
+ OldC->uncheckedReplaceAllUsesWith(New);
+ OldC->destroyConstant(); // This constant is now dead, destroy it.
+ }
+ };
+}
+
+static std::vector<Constant*> getValType(ConstantVector *CP) {
+ std::vector<Constant*> Elements;
+ Elements.reserve(CP->getNumOperands());
+ for (unsigned i = 0, e = CP->getNumOperands(); i != e; ++i)
+ Elements.push_back(CP->getOperand(i));
+ return Elements;
+}
+
+static ManagedStatic<ValueMap<std::vector<Constant*>, VectorType,
+ ConstantVector> > VectorConstants;
+
+Constant *ConstantVector::get(const VectorType *Ty,
+ const std::vector<Constant*> &V) {
+ // If this is an all-zero vector, return a ConstantAggregateZero object
+ if (!V.empty()) {
+ Constant *C = V[0];
+ if (!C->isNullValue())
+ return VectorConstants->getOrCreate(Ty, V);
+ for (unsigned i = 1, e = V.size(); i != e; ++i)
+ if (V[i] != C)
+ return VectorConstants->getOrCreate(Ty, V);
+ }
+ return ConstantAggregateZero::get(Ty);
+}
+
+Constant *ConstantVector::get(const std::vector<Constant*> &V) {
+ assert(!V.empty() && "Cannot infer type if V is empty");
+ return get(VectorType::get(V.front()->getType(),V.size()), V);
+}
+
+// destroyConstant - Remove the constant from the constant table...
+//
+void ConstantVector::destroyConstant() {
+ VectorConstants->remove(this);
destroyConstantImpl();
}
+/// This function will return true iff every element in this vector constant
+/// is set to all ones.
+/// @returns true iff this constant's emements are all set to all ones.
+/// @brief Determine if the value is all ones.
+bool ConstantVector::isAllOnesValue() const {
+ // Check out first element.
+ const Constant *Elt = getOperand(0);
+ const ConstantInt *CI = dyn_cast<ConstantInt>(Elt);
+ if (!CI || !CI->isAllOnesValue()) return false;
+ // Then make sure all remaining elements point to the same value.
+ for (unsigned I = 1, E = getNumOperands(); I < E; ++I) {
+ if (getOperand(I) != Elt) return false;
+ }
+ return true;
+}
+
//---- ConstantPointerNull::get() implementation...
//
};
}
-static ValueMap<char, PointerType, ConstantPointerNull> NullPtrConstants;
+static ManagedStatic<ValueMap<char, PointerType,
+ ConstantPointerNull> > NullPtrConstants;
+
+static char getValType(ConstantPointerNull *) {
+ return 0;
+}
+
ConstantPointerNull *ConstantPointerNull::get(const PointerType *Ty) {
- return NullPtrConstants.getOrCreate(Ty, 0);
+ return NullPtrConstants->getOrCreate(Ty, 0);
}
// destroyConstant - Remove the constant from the constant table...
//
void ConstantPointerNull::destroyConstant() {
- NullPtrConstants.remove(this);
+ NullPtrConstants->remove(this);
destroyConstantImpl();
}
-//---- ConstantPointerRef::get() implementation...
+//---- UndefValue::get() implementation...
//
-ConstantPointerRef *ConstantPointerRef::get(GlobalValue *GV) {
- assert(GV->getParent() && "Global Value must be attached to a module!");
-
- // The Module handles the pointer reference sharing...
- return GV->getParent()->getConstantPointerRef(GV);
+
+namespace llvm {
+ // UndefValue does not take extra "value" argument...
+ template<class ValType>
+ struct ConstantCreator<UndefValue, Type, ValType> {
+ static UndefValue *create(const Type *Ty, const ValType &V) {
+ return new UndefValue(Ty);
+ }
+ };
+
+ template<>
+ struct ConvertConstantType<UndefValue, Type> {
+ static void convert(UndefValue *OldC, const Type *NewTy) {
+ // Make everyone now use a constant of the new type.
+ Constant *New = UndefValue::get(NewTy);
+ assert(New != OldC && "Didn't replace constant??");
+ OldC->uncheckedReplaceAllUsesWith(New);
+ OldC->destroyConstant(); // This constant is now dead, destroy it.
+ }
+ };
}
-// destroyConstant - Remove the constant from the constant table...
+static ManagedStatic<ValueMap<char, Type, UndefValue> > UndefValueConstants;
+
+static char getValType(UndefValue *) {
+ return 0;
+}
+
+
+UndefValue *UndefValue::get(const Type *Ty) {
+ return UndefValueConstants->getOrCreate(Ty, 0);
+}
+
+// destroyConstant - Remove the constant from the constant table.
//
-void ConstantPointerRef::destroyConstant() {
- getValue()->getParent()->destroyConstantPointerRef(this);
+void UndefValue::destroyConstant() {
+ UndefValueConstants->remove(this);
destroyConstantImpl();
}
//---- ConstantExpr::get() implementations...
//
-typedef std::pair<unsigned, std::vector<Constant*> > ExprMapKeyType;
+
+struct ExprMapKeyType {
+ explicit ExprMapKeyType(unsigned opc, std::vector<Constant*> ops,
+ unsigned short pred = 0) : opcode(opc), predicate(pred), operands(ops) { }
+ uint16_t opcode;
+ uint16_t predicate;
+ std::vector<Constant*> operands;
+ bool operator==(const ExprMapKeyType& that) const {
+ return this->opcode == that.opcode &&
+ this->predicate == that.predicate &&
+ this->operands == that.operands;
+ }
+ bool operator<(const ExprMapKeyType & that) const {
+ return this->opcode < that.opcode ||
+ (this->opcode == that.opcode && this->predicate < that.predicate) ||
+ (this->opcode == that.opcode && this->predicate == that.predicate &&
+ this->operands < that.operands);
+ }
+
+ bool operator!=(const ExprMapKeyType& that) const {
+ return !(*this == that);
+ }
+};
namespace llvm {
template<>
struct ConstantCreator<ConstantExpr, Type, ExprMapKeyType> {
- static ConstantExpr *create(const Type *Ty, const ExprMapKeyType &V) {
- if (V.first == Instruction::Cast)
- return new ConstantExpr(Instruction::Cast, V.second[0], Ty);
- if ((V.first >= Instruction::BinaryOpsBegin &&
- V.first < Instruction::BinaryOpsEnd) ||
- V.first == Instruction::Shl || V.first == Instruction::Shr)
- return new ConstantExpr(V.first, V.second[0], V.second[1]);
- if (V.first == Instruction::Select)
- return new ConstantExpr(V.second[0], V.second[1], V.second[2]);
-
- assert(V.first == Instruction::GetElementPtr && "Invalid ConstantExpr!");
-
- std::vector<Constant*> IdxList(V.second.begin()+1, V.second.end());
- return new ConstantExpr(V.second[0], IdxList, Ty);
+ static ConstantExpr *create(const Type *Ty, const ExprMapKeyType &V,
+ unsigned short pred = 0) {
+ if (Instruction::isCast(V.opcode))
+ return new UnaryConstantExpr(V.opcode, V.operands[0], Ty);
+ if ((V.opcode >= Instruction::BinaryOpsBegin &&
+ V.opcode < Instruction::BinaryOpsEnd))
+ return new BinaryConstantExpr(V.opcode, V.operands[0], V.operands[1]);
+ if (V.opcode == Instruction::Select)
+ return new SelectConstantExpr(V.operands[0], V.operands[1],
+ V.operands[2]);
+ if (V.opcode == Instruction::ExtractElement)
+ return new ExtractElementConstantExpr(V.operands[0], V.operands[1]);
+ if (V.opcode == Instruction::InsertElement)
+ return new InsertElementConstantExpr(V.operands[0], V.operands[1],
+ V.operands[2]);
+ if (V.opcode == Instruction::ShuffleVector)
+ return new ShuffleVectorConstantExpr(V.operands[0], V.operands[1],
+ V.operands[2]);
+ if (V.opcode == Instruction::GetElementPtr) {
+ std::vector<Constant*> IdxList(V.operands.begin()+1, V.operands.end());
+ return new GetElementPtrConstantExpr(V.operands[0], IdxList, Ty);
+ }
+
+ // The compare instructions are weird. We have to encode the predicate
+ // value and it is combined with the instruction opcode by multiplying
+ // the opcode by one hundred. We must decode this to get the predicate.
+ if (V.opcode == Instruction::ICmp)
+ return new CompareConstantExpr(Instruction::ICmp, V.predicate,
+ V.operands[0], V.operands[1]);
+ if (V.opcode == Instruction::FCmp)
+ return new CompareConstantExpr(Instruction::FCmp, V.predicate,
+ V.operands[0], V.operands[1]);
+ assert(0 && "Invalid ConstantExpr!");
+ return 0;
}
};
static void convert(ConstantExpr *OldC, const Type *NewTy) {
Constant *New;
switch (OldC->getOpcode()) {
- case Instruction::Cast:
- New = ConstantExpr::getCast(OldC->getOperand(0), NewTy);
+ case Instruction::Trunc:
+ case Instruction::ZExt:
+ case Instruction::SExt:
+ case Instruction::FPTrunc:
+ case Instruction::FPExt:
+ case Instruction::UIToFP:
+ case Instruction::SIToFP:
+ case Instruction::FPToUI:
+ case Instruction::FPToSI:
+ case Instruction::PtrToInt:
+ case Instruction::IntToPtr:
+ case Instruction::BitCast:
+ New = ConstantExpr::getCast(OldC->getOpcode(), OldC->getOperand(0),
+ NewTy);
break;
case Instruction::Select:
New = ConstantExpr::getSelectTy(NewTy, OldC->getOperand(0),
OldC->getOperand(1),
OldC->getOperand(2));
break;
- case Instruction::Shl:
- case Instruction::Shr:
- New = ConstantExpr::getShiftTy(NewTy, OldC->getOpcode(),
- OldC->getOperand(0), OldC->getOperand(1));
- break;
default:
assert(OldC->getOpcode() >= Instruction::BinaryOpsBegin &&
- OldC->getOpcode() < Instruction::BinaryOpsEnd);
+ OldC->getOpcode() < Instruction::BinaryOpsEnd);
New = ConstantExpr::getTy(NewTy, OldC->getOpcode(), OldC->getOperand(0),
OldC->getOperand(1));
break;
case Instruction::GetElementPtr:
- // Make everyone now use a constant of the new type...
- std::vector<Constant*> C;
- for (unsigned i = 1, e = OldC->getNumOperands(); i != e; ++i)
- C.push_back(cast<Constant>(OldC->getOperand(i)));
- New = ConstantExpr::getGetElementPtrTy(NewTy, OldC->getOperand(0), C);
+ // Make everyone now use a constant of the new type...
+ std::vector<Value*> Idx(OldC->op_begin()+1, OldC->op_end());
+ New = ConstantExpr::getGetElementPtrTy(NewTy, OldC->getOperand(0),
+ &Idx[0], Idx.size());
break;
}
-
+
assert(New != OldC && "Didn't replace constant??");
OldC->uncheckedReplaceAllUsesWith(New);
OldC->destroyConstant(); // This constant is now dead, destroy it.
} // end namespace llvm
-static ValueMap<ExprMapKeyType, Type, ConstantExpr> ExprConstants;
+static ExprMapKeyType getValType(ConstantExpr *CE) {
+ std::vector<Constant*> Operands;
+ Operands.reserve(CE->getNumOperands());
+ for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i)
+ Operands.push_back(cast<Constant>(CE->getOperand(i)));
+ return ExprMapKeyType(CE->getOpcode(), Operands,
+ CE->isCompare() ? CE->getPredicate() : 0);
+}
-Constant *ConstantExpr::getCast(Constant *C, const Type *Ty) {
- assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
+static ManagedStatic<ValueMap<ExprMapKeyType, Type,
+ ConstantExpr> > ExprConstants;
- if (Constant *FC = ConstantFoldCastInstruction(C, Ty))
- return FC; // Fold a few common cases...
+/// This is a utility function to handle folding of casts and lookup of the
+/// cast in the ExprConstants map. It is usedby the various get* methods below.
+static inline Constant *getFoldedCast(
+ Instruction::CastOps opc, Constant *C, const Type *Ty) {
+ assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
+ // Fold a few common cases
+ if (Constant *FC = ConstantFoldCastInstruction(opc, C, Ty))
+ return FC;
// Look up the constant in the table first to ensure uniqueness
std::vector<Constant*> argVec(1, C);
- ExprMapKeyType Key = std::make_pair(Instruction::Cast, argVec);
- return ExprConstants.getOrCreate(Ty, Key);
+ ExprMapKeyType Key(opc, argVec);
+ return ExprConstants->getOrCreate(Ty, Key);
+}
+
+Constant *ConstantExpr::getCast(unsigned oc, Constant *C, const Type *Ty) {
+ Instruction::CastOps opc = Instruction::CastOps(oc);
+ assert(Instruction::isCast(opc) && "opcode out of range");
+ assert(C && Ty && "Null arguments to getCast");
+ assert(Ty->isFirstClassType() && "Cannot cast to an aggregate type!");
+
+ switch (opc) {
+ default:
+ assert(0 && "Invalid cast opcode");
+ break;
+ case Instruction::Trunc: return getTrunc(C, Ty);
+ case Instruction::ZExt: return getZExt(C, Ty);
+ case Instruction::SExt: return getSExt(C, Ty);
+ case Instruction::FPTrunc: return getFPTrunc(C, Ty);
+ case Instruction::FPExt: return getFPExtend(C, Ty);
+ case Instruction::UIToFP: return getUIToFP(C, Ty);
+ case Instruction::SIToFP: return getSIToFP(C, Ty);
+ case Instruction::FPToUI: return getFPToUI(C, Ty);
+ case Instruction::FPToSI: return getFPToSI(C, Ty);
+ case Instruction::PtrToInt: return getPtrToInt(C, Ty);
+ case Instruction::IntToPtr: return getIntToPtr(C, Ty);
+ case Instruction::BitCast: return getBitCast(C, Ty);
+ }
+ return 0;
+}
+
+Constant *ConstantExpr::getZExtOrBitCast(Constant *C, const Type *Ty) {
+ if (C->getType()->getPrimitiveSizeInBits() == Ty->getPrimitiveSizeInBits())
+ return getCast(Instruction::BitCast, C, Ty);
+ return getCast(Instruction::ZExt, C, Ty);
+}
+
+Constant *ConstantExpr::getSExtOrBitCast(Constant *C, const Type *Ty) {
+ if (C->getType()->getPrimitiveSizeInBits() == Ty->getPrimitiveSizeInBits())
+ return getCast(Instruction::BitCast, C, Ty);
+ return getCast(Instruction::SExt, C, Ty);
+}
+
+Constant *ConstantExpr::getTruncOrBitCast(Constant *C, const Type *Ty) {
+ if (C->getType()->getPrimitiveSizeInBits() == Ty->getPrimitiveSizeInBits())
+ return getCast(Instruction::BitCast, C, Ty);
+ return getCast(Instruction::Trunc, C, Ty);
+}
+
+Constant *ConstantExpr::getPointerCast(Constant *S, const Type *Ty) {
+ assert(isa<PointerType>(S->getType()) && "Invalid cast");
+ assert((Ty->isInteger() || isa<PointerType>(Ty)) && "Invalid cast");
+
+ if (Ty->isInteger())
+ return getCast(Instruction::PtrToInt, S, Ty);
+ return getCast(Instruction::BitCast, S, Ty);
+}
+
+Constant *ConstantExpr::getIntegerCast(Constant *C, const Type *Ty,
+ bool isSigned) {
+ assert(C->getType()->isInteger() && Ty->isInteger() && "Invalid cast");
+ unsigned SrcBits = C->getType()->getPrimitiveSizeInBits();
+ unsigned DstBits = Ty->getPrimitiveSizeInBits();
+ Instruction::CastOps opcode =
+ (SrcBits == DstBits ? Instruction::BitCast :
+ (SrcBits > DstBits ? Instruction::Trunc :
+ (isSigned ? Instruction::SExt : Instruction::ZExt)));
+ return getCast(opcode, C, Ty);
+}
+
+Constant *ConstantExpr::getFPCast(Constant *C, const Type *Ty) {
+ assert(C->getType()->isFloatingPoint() && Ty->isFloatingPoint() &&
+ "Invalid cast");
+ unsigned SrcBits = C->getType()->getPrimitiveSizeInBits();
+ unsigned DstBits = Ty->getPrimitiveSizeInBits();
+ if (SrcBits == DstBits)
+ return C; // Avoid a useless cast
+ Instruction::CastOps opcode =
+ (SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt);
+ return getCast(opcode, C, Ty);
+}
+
+Constant *ConstantExpr::getTrunc(Constant *C, const Type *Ty) {
+ assert(C->getType()->isInteger() && "Trunc operand must be integer");
+ assert(Ty->isInteger() && "Trunc produces only integral");
+ assert(C->getType()->getPrimitiveSizeInBits() > Ty->getPrimitiveSizeInBits()&&
+ "SrcTy must be larger than DestTy for Trunc!");
+
+ return getFoldedCast(Instruction::Trunc, C, Ty);
+}
+
+Constant *ConstantExpr::getSExt(Constant *C, const Type *Ty) {
+ assert(C->getType()->isInteger() && "SEXt operand must be integral");
+ assert(Ty->isInteger() && "SExt produces only integer");
+ assert(C->getType()->getPrimitiveSizeInBits() < Ty->getPrimitiveSizeInBits()&&
+ "SrcTy must be smaller than DestTy for SExt!");
+
+ return getFoldedCast(Instruction::SExt, C, Ty);
+}
+
+Constant *ConstantExpr::getZExt(Constant *C, const Type *Ty) {
+ assert(C->getType()->isInteger() && "ZEXt operand must be integral");
+ assert(Ty->isInteger() && "ZExt produces only integer");
+ assert(C->getType()->getPrimitiveSizeInBits() < Ty->getPrimitiveSizeInBits()&&
+ "SrcTy must be smaller than DestTy for ZExt!");
+
+ return getFoldedCast(Instruction::ZExt, C, Ty);
+}
+
+Constant *ConstantExpr::getFPTrunc(Constant *C, const Type *Ty) {
+ assert(C->getType()->isFloatingPoint() && Ty->isFloatingPoint() &&
+ C->getType()->getPrimitiveSizeInBits() > Ty->getPrimitiveSizeInBits()&&
+ "This is an illegal floating point truncation!");
+ return getFoldedCast(Instruction::FPTrunc, C, Ty);
+}
+
+Constant *ConstantExpr::getFPExtend(Constant *C, const Type *Ty) {
+ assert(C->getType()->isFloatingPoint() && Ty->isFloatingPoint() &&
+ C->getType()->getPrimitiveSizeInBits() < Ty->getPrimitiveSizeInBits()&&
+ "This is an illegal floating point extension!");
+ return getFoldedCast(Instruction::FPExt, C, Ty);
+}
+
+Constant *ConstantExpr::getUIToFP(Constant *C, const Type *Ty) {
+ assert(C->getType()->isInteger() && Ty->isFloatingPoint() &&
+ "This is an illegal i32 to floating point cast!");
+ return getFoldedCast(Instruction::UIToFP, C, Ty);
+}
+
+Constant *ConstantExpr::getSIToFP(Constant *C, const Type *Ty) {
+ assert(C->getType()->isInteger() && Ty->isFloatingPoint() &&
+ "This is an illegal sint to floating point cast!");
+ return getFoldedCast(Instruction::SIToFP, C, Ty);
+}
+
+Constant *ConstantExpr::getFPToUI(Constant *C, const Type *Ty) {
+ assert(C->getType()->isFloatingPoint() && Ty->isInteger() &&
+ "This is an illegal floating point to i32 cast!");
+ return getFoldedCast(Instruction::FPToUI, C, Ty);
}
-Constant *ConstantExpr::getSignExtend(Constant *C, const Type *Ty) {
- assert(C->getType()->isInteger() && Ty->isInteger() &&
- C->getType()->getPrimitiveSize() <= Ty->getPrimitiveSize() &&
- "This is an illegal sign extension!");
- C = ConstantExpr::getCast(C, C->getType()->getSignedVersion());
- return ConstantExpr::getCast(C, Ty);
+Constant *ConstantExpr::getFPToSI(Constant *C, const Type *Ty) {
+ assert(C->getType()->isFloatingPoint() && Ty->isInteger() &&
+ "This is an illegal floating point to i32 cast!");
+ return getFoldedCast(Instruction::FPToSI, C, Ty);
}
-Constant *ConstantExpr::getZeroExtend(Constant *C, const Type *Ty) {
- assert(C->getType()->isInteger() && Ty->isInteger() &&
- C->getType()->getPrimitiveSize() <= Ty->getPrimitiveSize() &&
- "This is an illegal zero extension!");
- C = ConstantExpr::getCast(C, C->getType()->getUnsignedVersion());
- return ConstantExpr::getCast(C, Ty);
+Constant *ConstantExpr::getPtrToInt(Constant *C, const Type *DstTy) {
+ assert(isa<PointerType>(C->getType()) && "PtrToInt source must be pointer");
+ assert(DstTy->isInteger() && "PtrToInt destination must be integral");
+ return getFoldedCast(Instruction::PtrToInt, C, DstTy);
+}
+
+Constant *ConstantExpr::getIntToPtr(Constant *C, const Type *DstTy) {
+ assert(C->getType()->isInteger() && "IntToPtr source must be integral");
+ assert(isa<PointerType>(DstTy) && "IntToPtr destination must be a pointer");
+ return getFoldedCast(Instruction::IntToPtr, C, DstTy);
+}
+
+Constant *ConstantExpr::getBitCast(Constant *C, const Type *DstTy) {
+ // BitCast implies a no-op cast of type only. No bits change. However, you
+ // can't cast pointers to anything but pointers.
+ const Type *SrcTy = C->getType();
+ assert((isa<PointerType>(SrcTy) == isa<PointerType>(DstTy)) &&
+ "BitCast cannot cast pointer to non-pointer and vice versa");
+
+ // Now we know we're not dealing with mismatched pointer casts (ptr->nonptr
+ // or nonptr->ptr). For all the other types, the cast is okay if source and
+ // destination bit widths are identical.
+ unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
+ unsigned DstBitSize = DstTy->getPrimitiveSizeInBits();
+ assert(SrcBitSize == DstBitSize && "BitCast requies types of same width");
+ return getFoldedCast(Instruction::BitCast, C, DstTy);
+}
+
+Constant *ConstantExpr::getSizeOf(const Type *Ty) {
+ // sizeof is implemented as: (ulong) gep (Ty*)null, 1
+ Constant *GEPIdx = ConstantInt::get(Type::Int32Ty, 1);
+ Constant *GEP =
+ getGetElementPtr(getNullValue(PointerType::get(Ty)), &GEPIdx, 1);
+ return getCast(Instruction::PtrToInt, GEP, Type::Int64Ty);
}
Constant *ConstantExpr::getTy(const Type *ReqTy, unsigned Opcode,
Constant *C1, Constant *C2) {
- if (Opcode == Instruction::Shl || Opcode == Instruction::Shr)
- return getShiftTy(ReqTy, Opcode, C1, C2);
// Check the operands for consistency first
- assert((Opcode >= Instruction::BinaryOpsBegin &&
- Opcode < Instruction::BinaryOpsEnd) &&
+ assert(Opcode >= Instruction::BinaryOpsBegin &&
+ Opcode < Instruction::BinaryOpsEnd &&
"Invalid opcode in binary constant expression");
assert(C1->getType() == C2->getType() &&
"Operand types in binary constant expression should match");
- if (ReqTy == C1->getType())
+ if (ReqTy == C1->getType() || ReqTy == Type::Int1Ty)
if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
return FC; // Fold a few common cases...
std::vector<Constant*> argVec(1, C1); argVec.push_back(C2);
- ExprMapKeyType Key = std::make_pair(Opcode, argVec);
- return ExprConstants.getOrCreate(ReqTy, Key);
+ ExprMapKeyType Key(Opcode, argVec);
+ return ExprConstants->getOrCreate(ReqTy, Key);
+}
+
+Constant *ConstantExpr::getCompareTy(unsigned short predicate,
+ Constant *C1, Constant *C2) {
+ switch (predicate) {
+ default: assert(0 && "Invalid CmpInst predicate");
+ case FCmpInst::FCMP_FALSE: case FCmpInst::FCMP_OEQ: case FCmpInst::FCMP_OGT:
+ case FCmpInst::FCMP_OGE: case FCmpInst::FCMP_OLT: case FCmpInst::FCMP_OLE:
+ case FCmpInst::FCMP_ONE: case FCmpInst::FCMP_ORD: case FCmpInst::FCMP_UNO:
+ case FCmpInst::FCMP_UEQ: case FCmpInst::FCMP_UGT: case FCmpInst::FCMP_UGE:
+ case FCmpInst::FCMP_ULT: case FCmpInst::FCMP_ULE: case FCmpInst::FCMP_UNE:
+ case FCmpInst::FCMP_TRUE:
+ return getFCmp(predicate, C1, C2);
+ case ICmpInst::ICMP_EQ: case ICmpInst::ICMP_NE: case ICmpInst::ICMP_UGT:
+ case ICmpInst::ICMP_UGE: case ICmpInst::ICMP_ULT: case ICmpInst::ICMP_ULE:
+ case ICmpInst::ICMP_SGT: case ICmpInst::ICMP_SGE: case ICmpInst::ICMP_SLT:
+ case ICmpInst::ICMP_SLE:
+ return getICmp(predicate, C1, C2);
+ }
+}
+
+Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2) {
+#ifndef NDEBUG
+ switch (Opcode) {
+ case Instruction::Add:
+ case Instruction::Sub:
+ case Instruction::Mul:
+ assert(C1->getType() == C2->getType() && "Op types should be identical!");
+ assert((C1->getType()->isInteger() || C1->getType()->isFloatingPoint() ||
+ isa<VectorType>(C1->getType())) &&
+ "Tried to create an arithmetic operation on a non-arithmetic type!");
+ break;
+ case Instruction::UDiv:
+ case Instruction::SDiv:
+ assert(C1->getType() == C2->getType() && "Op types should be identical!");
+ assert((C1->getType()->isInteger() || (isa<VectorType>(C1->getType()) &&
+ cast<VectorType>(C1->getType())->getElementType()->isInteger())) &&
+ "Tried to create an arithmetic operation on a non-arithmetic type!");
+ break;
+ case Instruction::FDiv:
+ assert(C1->getType() == C2->getType() && "Op types should be identical!");
+ assert((C1->getType()->isFloatingPoint() || (isa<VectorType>(C1->getType())
+ && cast<VectorType>(C1->getType())->getElementType()->isFloatingPoint()))
+ && "Tried to create an arithmetic operation on a non-arithmetic type!");
+ break;
+ case Instruction::URem:
+ case Instruction::SRem:
+ assert(C1->getType() == C2->getType() && "Op types should be identical!");
+ assert((C1->getType()->isInteger() || (isa<VectorType>(C1->getType()) &&
+ cast<VectorType>(C1->getType())->getElementType()->isInteger())) &&
+ "Tried to create an arithmetic operation on a non-arithmetic type!");
+ break;
+ case Instruction::FRem:
+ assert(C1->getType() == C2->getType() && "Op types should be identical!");
+ assert((C1->getType()->isFloatingPoint() || (isa<VectorType>(C1->getType())
+ && cast<VectorType>(C1->getType())->getElementType()->isFloatingPoint()))
+ && "Tried to create an arithmetic operation on a non-arithmetic type!");
+ break;
+ case Instruction::And:
+ case Instruction::Or:
+ case Instruction::Xor:
+ assert(C1->getType() == C2->getType() && "Op types should be identical!");
+ assert((C1->getType()->isInteger() || isa<VectorType>(C1->getType())) &&
+ "Tried to create a logical operation on a non-integral type!");
+ break;
+ case Instruction::Shl:
+ case Instruction::LShr:
+ case Instruction::AShr:
+ assert(C1->getType() == C2->getType() && "Op types should be identical!");
+ assert(C1->getType()->isInteger() &&
+ "Tried to create a shift operation on a non-integer type!");
+ break;
+ default:
+ break;
+ }
+#endif
+
+ return getTy(C1->getType(), Opcode, C1, C2);
+}
+
+Constant *ConstantExpr::getCompare(unsigned short pred,
+ Constant *C1, Constant *C2) {
+ assert(C1->getType() == C2->getType() && "Op types should be identical!");
+ return getCompareTy(pred, C1, C2);
}
Constant *ConstantExpr::getSelectTy(const Type *ReqTy, Constant *C,
Constant *V1, Constant *V2) {
- assert(C->getType() == Type::BoolTy && "Select condition must be bool!");
+ assert(C->getType() == Type::Int1Ty && "Select condition must be i1!");
assert(V1->getType() == V2->getType() && "Select value types must match!");
assert(V1->getType()->isFirstClassType() && "Cannot select aggregate type!");
std::vector<Constant*> argVec(3, C);
argVec[1] = V1;
argVec[2] = V2;
- ExprMapKeyType Key = std::make_pair(Instruction::Select, argVec);
- return ExprConstants.getOrCreate(ReqTy, Key);
+ ExprMapKeyType Key(Instruction::Select, argVec);
+ return ExprConstants->getOrCreate(ReqTy, Key);
}
-/// getShiftTy - Return a shift left or shift right constant expr
-Constant *ConstantExpr::getShiftTy(const Type *ReqTy, unsigned Opcode,
- Constant *C1, Constant *C2) {
- // Check the operands for consistency first
- assert((Opcode == Instruction::Shl ||
- Opcode == Instruction::Shr) &&
- "Invalid opcode in binary constant expression");
- assert(C1->getType()->isIntegral() && C2->getType() == Type::UByteTy &&
- "Invalid operand types for Shift constant expr!");
+Constant *ConstantExpr::getGetElementPtrTy(const Type *ReqTy, Constant *C,
+ Value* const *Idxs,
+ unsigned NumIdx) {
+ assert(GetElementPtrInst::getIndexedType(C->getType(), Idxs, Idxs+NumIdx, true) &&
+ "GEP indices invalid!");
- if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
+ if (Constant *FC = ConstantFoldGetElementPtr(C, (Constant**)Idxs, NumIdx))
return FC; // Fold a few common cases...
+ assert(isa<PointerType>(C->getType()) &&
+ "Non-pointer type for constant GetElementPtr expression");
// Look up the constant in the table first to ensure uniqueness
- std::vector<Constant*> argVec(1, C1); argVec.push_back(C2);
- ExprMapKeyType Key = std::make_pair(Opcode, argVec);
- return ExprConstants.getOrCreate(ReqTy, Key);
+ std::vector<Constant*> ArgVec;
+ ArgVec.reserve(NumIdx+1);
+ ArgVec.push_back(C);
+ for (unsigned i = 0; i != NumIdx; ++i)
+ ArgVec.push_back(cast<Constant>(Idxs[i]));
+ const ExprMapKeyType Key(Instruction::GetElementPtr, ArgVec);
+ return ExprConstants->getOrCreate(ReqTy, Key);
+}
+
+Constant *ConstantExpr::getGetElementPtr(Constant *C, Value* const *Idxs,
+ unsigned NumIdx) {
+ // Get the result type of the getelementptr!
+ const Type *Ty =
+ GetElementPtrInst::getIndexedType(C->getType(), Idxs, Idxs+NumIdx, true);
+ assert(Ty && "GEP indices invalid!");
+ return getGetElementPtrTy(PointerType::get(Ty), C, Idxs, NumIdx);
}
+Constant *ConstantExpr::getGetElementPtr(Constant *C, Constant* const *Idxs,
+ unsigned NumIdx) {
+ return getGetElementPtr(C, (Value* const *)Idxs, NumIdx);
+}
-Constant *ConstantExpr::getGetElementPtrTy(const Type *ReqTy, Constant *C,
- const std::vector<Constant*> &IdxList) {
- assert(GetElementPtrInst::getIndexedType(C->getType(),
- std::vector<Value*>(IdxList.begin(), IdxList.end()), true) &&
- "GEP indices invalid!");
- if (Constant *FC = ConstantFoldGetElementPtr(C, IdxList))
+Constant *
+ConstantExpr::getICmp(unsigned short pred, Constant* LHS, Constant* RHS) {
+ assert(LHS->getType() == RHS->getType());
+ assert(pred >= ICmpInst::FIRST_ICMP_PREDICATE &&
+ pred <= ICmpInst::LAST_ICMP_PREDICATE && "Invalid ICmp Predicate");
+
+ if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
return FC; // Fold a few common cases...
- assert(isa<PointerType>(C->getType()) &&
- "Non-pointer type for constant GetElementPtr expression");
// Look up the constant in the table first to ensure uniqueness
- std::vector<Constant*> argVec(1, C);
- argVec.insert(argVec.end(), IdxList.begin(), IdxList.end());
- const ExprMapKeyType &Key = std::make_pair(Instruction::GetElementPtr,argVec);
- return ExprConstants.getOrCreate(ReqTy, Key);
+ std::vector<Constant*> ArgVec;
+ ArgVec.push_back(LHS);
+ ArgVec.push_back(RHS);
+ // Get the key type with both the opcode and predicate
+ const ExprMapKeyType Key(Instruction::ICmp, ArgVec, pred);
+ return ExprConstants->getOrCreate(Type::Int1Ty, Key);
}
-Constant *ConstantExpr::getGetElementPtr(Constant *C,
- const std::vector<Constant*> &IdxList){
- // Get the result type of the getelementptr!
- std::vector<Value*> VIdxList(IdxList.begin(), IdxList.end());
+Constant *
+ConstantExpr::getFCmp(unsigned short pred, Constant* LHS, Constant* RHS) {
+ assert(LHS->getType() == RHS->getType());
+ assert(pred <= FCmpInst::LAST_FCMP_PREDICATE && "Invalid FCmp Predicate");
- const Type *Ty = GetElementPtrInst::getIndexedType(C->getType(), VIdxList,
- true);
- assert(Ty && "GEP indices invalid!");
- return getGetElementPtrTy(PointerType::get(Ty), C, IdxList);
+ if (Constant *FC = ConstantFoldCompareInstruction(pred, LHS, RHS))
+ return FC; // Fold a few common cases...
+
+ // Look up the constant in the table first to ensure uniqueness
+ std::vector<Constant*> ArgVec;
+ ArgVec.push_back(LHS);
+ ArgVec.push_back(RHS);
+ // Get the key type with both the opcode and predicate
+ const ExprMapKeyType Key(Instruction::FCmp, ArgVec, pred);
+ return ExprConstants->getOrCreate(Type::Int1Ty, Key);
+}
+
+Constant *ConstantExpr::getExtractElementTy(const Type *ReqTy, Constant *Val,
+ Constant *Idx) {
+ if (Constant *FC = ConstantFoldExtractElementInstruction(Val, Idx))
+ return FC; // Fold a few common cases...
+ // Look up the constant in the table first to ensure uniqueness
+ std::vector<Constant*> ArgVec(1, Val);
+ ArgVec.push_back(Idx);
+ const ExprMapKeyType Key(Instruction::ExtractElement,ArgVec);
+ return ExprConstants->getOrCreate(ReqTy, Key);
+}
+
+Constant *ConstantExpr::getExtractElement(Constant *Val, Constant *Idx) {
+ assert(isa<VectorType>(Val->getType()) &&
+ "Tried to create extractelement operation on non-vector type!");
+ assert(Idx->getType() == Type::Int32Ty &&
+ "Extractelement index must be i32 type!");
+ return getExtractElementTy(cast<VectorType>(Val->getType())->getElementType(),
+ Val, Idx);
}
+Constant *ConstantExpr::getInsertElementTy(const Type *ReqTy, Constant *Val,
+ Constant *Elt, Constant *Idx) {
+ if (Constant *FC = ConstantFoldInsertElementInstruction(Val, Elt, Idx))
+ return FC; // Fold a few common cases...
+ // Look up the constant in the table first to ensure uniqueness
+ std::vector<Constant*> ArgVec(1, Val);
+ ArgVec.push_back(Elt);
+ ArgVec.push_back(Idx);
+ const ExprMapKeyType Key(Instruction::InsertElement,ArgVec);
+ return ExprConstants->getOrCreate(ReqTy, Key);
+}
+
+Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
+ Constant *Idx) {
+ assert(isa<VectorType>(Val->getType()) &&
+ "Tried to create insertelement operation on non-vector type!");
+ assert(Elt->getType() == cast<VectorType>(Val->getType())->getElementType()
+ && "Insertelement types must match!");
+ assert(Idx->getType() == Type::Int32Ty &&
+ "Insertelement index must be i32 type!");
+ return getInsertElementTy(cast<VectorType>(Val->getType())->getElementType(),
+ Val, Elt, Idx);
+}
+
+Constant *ConstantExpr::getShuffleVectorTy(const Type *ReqTy, Constant *V1,
+ Constant *V2, Constant *Mask) {
+ if (Constant *FC = ConstantFoldShuffleVectorInstruction(V1, V2, Mask))
+ return FC; // Fold a few common cases...
+ // Look up the constant in the table first to ensure uniqueness
+ std::vector<Constant*> ArgVec(1, V1);
+ ArgVec.push_back(V2);
+ ArgVec.push_back(Mask);
+ const ExprMapKeyType Key(Instruction::ShuffleVector,ArgVec);
+ return ExprConstants->getOrCreate(ReqTy, Key);
+}
+
+Constant *ConstantExpr::getShuffleVector(Constant *V1, Constant *V2,
+ Constant *Mask) {
+ assert(ShuffleVectorInst::isValidOperands(V1, V2, Mask) &&
+ "Invalid shuffle vector constant expr operands!");
+ return getShuffleVectorTy(V1->getType(), V1, V2, Mask);
+}
+
+Constant *ConstantExpr::getZeroValueForNegationExpr(const Type *Ty) {
+ if (const VectorType *PTy = dyn_cast<VectorType>(Ty))
+ if (PTy->getElementType()->isFloatingPoint()) {
+ std::vector<Constant*> zeros(PTy->getNumElements(),
+ ConstantFP::getNegativeZero(PTy->getElementType()));
+ return ConstantVector::get(PTy, zeros);
+ }
+
+ if (Ty->isFloatingPoint())
+ return ConstantFP::getNegativeZero(Ty);
+
+ return Constant::getNullValue(Ty);
+}
// destroyConstant - Remove the constant from the constant table...
//
void ConstantExpr::destroyConstant() {
- ExprConstants.remove(this);
+ ExprConstants->remove(this);
destroyConstantImpl();
}
const char *ConstantExpr::getOpcodeName() const {
return Instruction::getOpcodeName(getOpcode());
}
+
+//===----------------------------------------------------------------------===//
+// replaceUsesOfWithOnConstant implementations
+
+/// replaceUsesOfWithOnConstant - Update this constant array to change uses of
+/// 'From' to be uses of 'To'. This must update the uniquing data structures
+/// etc.
+///
+/// Note that we intentionally replace all uses of From with To here. Consider
+/// a large array that uses 'From' 1000 times. By handling this case all here,
+/// ConstantArray::replaceUsesOfWithOnConstant is only invoked once, and that
+/// single invocation handles all 1000 uses. Handling them one at a time would
+/// work, but would be really slow because it would have to unique each updated
+/// array instance.
+void ConstantArray::replaceUsesOfWithOnConstant(Value *From, Value *To,
+ Use *U) {
+ assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
+ Constant *ToC = cast<Constant>(To);
+
+ std::pair<ArrayConstantsTy::MapKey, Constant*> Lookup;
+ Lookup.first.first = getType();
+ Lookup.second = this;
+
+ std::vector<Constant*> &Values = Lookup.first.second;
+ Values.reserve(getNumOperands()); // Build replacement array.
+
+ // Fill values with the modified operands of the constant array. Also,
+ // compute whether this turns into an all-zeros array.
+ bool isAllZeros = false;
+ unsigned NumUpdated = 0;
+ if (!ToC->isNullValue()) {
+ for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
+ Constant *Val = cast<Constant>(O->get());
+ if (Val == From) {
+ Val = ToC;
+ ++NumUpdated;
+ }
+ Values.push_back(Val);
+ }
+ } else {
+ isAllZeros = true;
+ for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
+ Constant *Val = cast<Constant>(O->get());
+ if (Val == From) {
+ Val = ToC;
+ ++NumUpdated;
+ }
+ Values.push_back(Val);
+ if (isAllZeros) isAllZeros = Val->isNullValue();
+ }
+ }
+
+ Constant *Replacement = 0;
+ if (isAllZeros) {
+ Replacement = ConstantAggregateZero::get(getType());
+ } else {
+ // Check to see if we have this array type already.
+ bool Exists;
+ ArrayConstantsTy::MapTy::iterator I =
+ ArrayConstants->InsertOrGetItem(Lookup, Exists);
+
+ if (Exists) {
+ Replacement = I->second;
+ } else {
+ // Okay, the new shape doesn't exist in the system yet. Instead of
+ // creating a new constant array, inserting it, replaceallusesof'ing the
+ // old with the new, then deleting the old... just update the current one
+ // in place!
+ ArrayConstants->MoveConstantToNewSlot(this, I);
+
+ // Update to the new value. Optimize for the case when we have a single
+ // operand that we're changing, but handle bulk updates efficiently.
+ if (NumUpdated == 1) {
+ unsigned OperandToUpdate = U-OperandList;
+ assert(getOperand(OperandToUpdate) == From &&
+ "ReplaceAllUsesWith broken!");
+ setOperand(OperandToUpdate, ToC);
+ } else {
+ for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
+ if (getOperand(i) == From)
+ setOperand(i, ToC);
+ }
+ return;
+ }
+ }
+
+ // Otherwise, I do need to replace this with an existing value.
+ assert(Replacement != this && "I didn't contain From!");
+
+ // Everyone using this now uses the replacement.
+ uncheckedReplaceAllUsesWith(Replacement);
+
+ // Delete the old constant!
+ destroyConstant();
+}
+
+void ConstantStruct::replaceUsesOfWithOnConstant(Value *From, Value *To,
+ Use *U) {
+ assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
+ Constant *ToC = cast<Constant>(To);
+
+ unsigned OperandToUpdate = U-OperandList;
+ assert(getOperand(OperandToUpdate) == From && "ReplaceAllUsesWith broken!");
+
+ std::pair<StructConstantsTy::MapKey, Constant*> Lookup;
+ Lookup.first.first = getType();
+ Lookup.second = this;
+ std::vector<Constant*> &Values = Lookup.first.second;
+ Values.reserve(getNumOperands()); // Build replacement struct.
+
+
+ // Fill values with the modified operands of the constant struct. Also,
+ // compute whether this turns into an all-zeros struct.
+ bool isAllZeros = false;
+ if (!ToC->isNullValue()) {
+ for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O)
+ Values.push_back(cast<Constant>(O->get()));
+ } else {
+ isAllZeros = true;
+ for (Use *O = OperandList, *E = OperandList+getNumOperands(); O != E; ++O) {
+ Constant *Val = cast<Constant>(O->get());
+ Values.push_back(Val);
+ if (isAllZeros) isAllZeros = Val->isNullValue();
+ }
+ }
+ Values[OperandToUpdate] = ToC;
+
+ Constant *Replacement = 0;
+ if (isAllZeros) {
+ Replacement = ConstantAggregateZero::get(getType());
+ } else {
+ // Check to see if we have this array type already.
+ bool Exists;
+ StructConstantsTy::MapTy::iterator I =
+ StructConstants->InsertOrGetItem(Lookup, Exists);
+
+ if (Exists) {
+ Replacement = I->second;
+ } else {
+ // Okay, the new shape doesn't exist in the system yet. Instead of
+ // creating a new constant struct, inserting it, replaceallusesof'ing the
+ // old with the new, then deleting the old... just update the current one
+ // in place!
+ StructConstants->MoveConstantToNewSlot(this, I);
+
+ // Update to the new value.
+ setOperand(OperandToUpdate, ToC);
+ return;
+ }
+ }
+
+ assert(Replacement != this && "I didn't contain From!");
+
+ // Everyone using this now uses the replacement.
+ uncheckedReplaceAllUsesWith(Replacement);
+
+ // Delete the old constant!
+ destroyConstant();
+}
+
+void ConstantVector::replaceUsesOfWithOnConstant(Value *From, Value *To,
+ Use *U) {
+ assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
+
+ std::vector<Constant*> Values;
+ Values.reserve(getNumOperands()); // Build replacement array...
+ for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
+ Constant *Val = getOperand(i);
+ if (Val == From) Val = cast<Constant>(To);
+ Values.push_back(Val);
+ }
+
+ Constant *Replacement = ConstantVector::get(getType(), Values);
+ assert(Replacement != this && "I didn't contain From!");
+
+ // Everyone using this now uses the replacement.
+ uncheckedReplaceAllUsesWith(Replacement);
+
+ // Delete the old constant!
+ destroyConstant();
+}
+
+void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *ToV,
+ Use *U) {
+ assert(isa<Constant>(ToV) && "Cannot make Constant refer to non-constant!");
+ Constant *To = cast<Constant>(ToV);
+
+ Constant *Replacement = 0;
+ if (getOpcode() == Instruction::GetElementPtr) {
+ SmallVector<Constant*, 8> Indices;
+ Constant *Pointer = getOperand(0);
+ Indices.reserve(getNumOperands()-1);
+ if (Pointer == From) Pointer = To;
+
+ for (unsigned i = 1, e = getNumOperands(); i != e; ++i) {
+ Constant *Val = getOperand(i);
+ if (Val == From) Val = To;
+ Indices.push_back(Val);
+ }
+ Replacement = ConstantExpr::getGetElementPtr(Pointer,
+ &Indices[0], Indices.size());
+ } else if (isCast()) {
+ assert(getOperand(0) == From && "Cast only has one use!");
+ Replacement = ConstantExpr::getCast(getOpcode(), To, getType());
+ } else if (getOpcode() == Instruction::Select) {
+ Constant *C1 = getOperand(0);
+ Constant *C2 = getOperand(1);
+ Constant *C3 = getOperand(2);
+ if (C1 == From) C1 = To;
+ if (C2 == From) C2 = To;
+ if (C3 == From) C3 = To;
+ Replacement = ConstantExpr::getSelect(C1, C2, C3);
+ } else if (getOpcode() == Instruction::ExtractElement) {
+ Constant *C1 = getOperand(0);
+ Constant *C2 = getOperand(1);
+ if (C1 == From) C1 = To;
+ if (C2 == From) C2 = To;
+ Replacement = ConstantExpr::getExtractElement(C1, C2);
+ } else if (getOpcode() == Instruction::InsertElement) {
+ Constant *C1 = getOperand(0);
+ Constant *C2 = getOperand(1);
+ Constant *C3 = getOperand(1);
+ if (C1 == From) C1 = To;
+ if (C2 == From) C2 = To;
+ if (C3 == From) C3 = To;
+ Replacement = ConstantExpr::getInsertElement(C1, C2, C3);
+ } else if (getOpcode() == Instruction::ShuffleVector) {
+ Constant *C1 = getOperand(0);
+ Constant *C2 = getOperand(1);
+ Constant *C3 = getOperand(2);
+ if (C1 == From) C1 = To;
+ if (C2 == From) C2 = To;
+ if (C3 == From) C3 = To;
+ Replacement = ConstantExpr::getShuffleVector(C1, C2, C3);
+ } else if (isCompare()) {
+ Constant *C1 = getOperand(0);
+ Constant *C2 = getOperand(1);
+ if (C1 == From) C1 = To;
+ if (C2 == From) C2 = To;
+ if (getOpcode() == Instruction::ICmp)
+ Replacement = ConstantExpr::getICmp(getPredicate(), C1, C2);
+ else
+ Replacement = ConstantExpr::getFCmp(getPredicate(), C1, C2);
+ } else if (getNumOperands() == 2) {
+ Constant *C1 = getOperand(0);
+ Constant *C2 = getOperand(1);
+ if (C1 == From) C1 = To;
+ if (C2 == From) C2 = To;
+ Replacement = ConstantExpr::get(getOpcode(), C1, C2);
+ } else {
+ assert(0 && "Unknown ConstantExpr type!");
+ return;
+ }
+
+ assert(Replacement != this && "I didn't contain From!");
+
+ // Everyone using this now uses the replacement.
+ uncheckedReplaceAllUsesWith(Replacement);
+
+ // Delete the old constant!
+ destroyConstant();
+}
+
+
+/// getStringValue - Turn an LLVM constant pointer that eventually points to a
+/// global into a string value. Return an empty string if we can't do it.
+/// Parameter Chop determines if the result is chopped at the first null
+/// terminator.
+///
+std::string Constant::getStringValue(bool Chop, unsigned Offset) {
+ if (GlobalVariable *GV = dyn_cast<GlobalVariable>(this)) {
+ if (GV->hasInitializer() && isa<ConstantArray>(GV->getInitializer())) {
+ ConstantArray *Init = cast<ConstantArray>(GV->getInitializer());
+ if (Init->isString()) {
+ std::string Result = Init->getAsString();
+ if (Offset < Result.size()) {
+ // If we are pointing INTO The string, erase the beginning...
+ Result.erase(Result.begin(), Result.begin()+Offset);
+
+ // Take off the null terminator, and any string fragments after it.
+ if (Chop) {
+ std::string::size_type NullPos = Result.find_first_of((char)0);
+ if (NullPos != std::string::npos)
+ Result.erase(Result.begin()+NullPos, Result.end());
+ }
+ return Result;
+ }
+ }
+ }
+ } else if (Constant *C = dyn_cast<Constant>(this)) {
+ if (GlobalValue *GV = dyn_cast<GlobalValue>(C))
+ return GV->getStringValue(Chop, Offset);
+ else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
+ if (CE->getOpcode() == Instruction::GetElementPtr) {
+ // Turn a gep into the specified offset.
+ if (CE->getNumOperands() == 3 &&
+ cast<Constant>(CE->getOperand(1))->isNullValue() &&
+ isa<ConstantInt>(CE->getOperand(2))) {
+ Offset += cast<ConstantInt>(CE->getOperand(2))->getZExtValue();
+ return CE->getOperand(0)->getStringValue(Chop, Offset);
+ }
+ }
+ }
+ }
+ return "";
+}