//===-- 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 "llvm/ConstantHandling.h"
+#include "ConstantFolding.h"
#include "llvm/DerivedTypes.h"
-#include "llvm/iMemory.h"
+#include "llvm/GlobalValue.h"
+#include "llvm/Instructions.h"
#include "llvm/SymbolTable.h"
#include "llvm/Module.h"
-#include "Support/StringExtras.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/MathExtras.h"
#include <algorithm>
+#include <iostream>
using namespace llvm;
ConstantBool *ConstantBool::True = new ConstantBool(true);
// 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
<< *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!");
// Static constructor to create a '0' constant of arbitrary type...
Constant *Constant::getNullValue(const Type *Ty) {
- switch (Ty->getPrimitiveID()) {
+ switch (Ty->getTypeID()) {
case Type::BoolTyID: {
static Constant *NullBool = ConstantBool::get(false);
return NullBool;
return NullDouble;
}
- case Type::PointerTyID:
+ case Type::PointerTyID:
return ConstantPointerNull::get(cast<PointerType>(Ty));
- case Type::StructTyID: {
- const StructType *ST = cast<StructType>(Ty);
- const StructType::ElementTypes &ETs = ST->getElementTypes();
- std::vector<Constant*> Elements;
- Elements.resize(ETs.size());
- for (unsigned i = 0, e = ETs.size(); i != e; ++i)
- Elements[i] = Constant::getNullValue(ETs[i]);
- return ConstantStruct::get(ST, Elements);
- }
- case Type::ArrayTyID: {
- const ArrayType *AT = cast<ArrayType>(Ty);
- Constant *El = Constant::getNullValue(AT->getElementType());
- unsigned NumElements = AT->getNumElements();
- return ConstantArray::get(AT, std::vector<Constant*>(NumElements, El));
- }
+ case Type::StructTyID:
+ case Type::ArrayTyID:
+ case Type::PackedTyID:
+ 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()) {
+ switch (Ty->getTypeID()) {
case Type::BoolTyID: return ConstantBool::True;
case Type::SByteTyID:
case Type::ShortTyID:
case Type::IntTyID:
case Type::LongTyID: {
- // Calculate 011111111111111...
+ // Calculate 011111111111111...
unsigned TypeBits = Ty->getPrimitiveSize()*8;
int64_t Val = INT64_MAX; // All ones
Val >>= 64-TypeBits; // Shift out unwanted 1 bits...
// Static constructor to create the minimum constant for an integral type...
ConstantIntegral *ConstantIntegral::getMinValue(const Type *Ty) {
- switch (Ty->getPrimitiveID()) {
+ switch (Ty->getTypeID()) {
case Type::BoolTyID: return ConstantBool::False;
case Type::SByteTyID:
case Type::ShortTyID:
case Type::IntTyID:
case Type::LongTyID: {
- // Calculate 1111111111000000000000
+ // Calculate 1111111111000000000000
unsigned TypeBits = Ty->getPrimitiveSize()*8;
int64_t Val = -1; // All ones
Val <<= TypeBits-1; // Shift over to the right spot
// Static constructor to create an integral constant with all bits set
ConstantIntegral *ConstantIntegral::getAllOnesValue(const Type *Ty) {
- switch (Ty->getPrimitiveID()) {
+ switch (Ty->getTypeID()) {
case Type::BoolTyID: return ConstantBool::True;
case Type::SByteTyID:
case Type::ShortTyID:
//===----------------------------------------------------------------------===//
// Normal Constructors
-ConstantBool::ConstantBool(bool V) : ConstantIntegral(Type::BoolTy) {
- Val = V;
+ConstantIntegral::ConstantIntegral(const Type *Ty, ValueTy VT, uint64_t V)
+ : Constant(Ty, VT, 0, 0) {
+ Val.Unsigned = V;
}
-ConstantInt::ConstantInt(const Type *Ty, uint64_t V) : ConstantIntegral(Ty) {
- Val.Unsigned = V;
+ConstantBool::ConstantBool(bool V)
+ : ConstantIntegral(Type::BoolTy, ConstantBoolVal, V) {
}
-ConstantSInt::ConstantSInt(const Type *Ty, int64_t V) : ConstantInt(Ty, V) {
+ConstantInt::ConstantInt(const Type *Ty, ValueTy VT, uint64_t V)
+ : ConstantIntegral(Ty, VT, V) {
+}
+
+ConstantSInt::ConstantSInt(const Type *Ty, int64_t V)
+ : ConstantInt(Ty, ConstantSIntVal, V) {
assert(Ty->isInteger() && Ty->isSigned() &&
- "Illegal type for unsigned integer constant!");
+ "Illegal type for signed integer constant!");
assert(isValueValidForType(Ty, V) && "Value too large for type!");
}
-ConstantUInt::ConstantUInt(const Type *Ty, uint64_t V) : ConstantInt(Ty, V) {
+ConstantUInt::ConstantUInt(const Type *Ty, uint64_t V)
+ : ConstantInt(Ty, ConstantUIntVal, V) {
assert(Ty->isInteger() && Ty->isUnsigned() &&
"Illegal type for unsigned integer constant!");
assert(isValueValidForType(Ty, V) && "Value too large for type!");
}
-ConstantFP::ConstantFP(const Type *Ty, double V) : Constant(Ty) {
+ConstantFP::ConstantFP(const Type *Ty, double V)
+ : Constant(Ty, ConstantFPVal, 0, 0) {
assert(isValueValidForType(Ty, V) && "Value too large for type!");
Val = V;
}
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 StructType::ElementTypes &ETypes = T->getElementTypes();
- assert(V.size() == ETypes.size() &&
+ 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() == ETypes[i] ||
- ((ETypes[i]->isAbstract() || V[i]->getType()->isAbstract()) &&
- ETypes[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.push_back(Use(GV, this));
+ConstantStruct::~ConstantStruct() {
+ delete [] OperandList;
}
-ConstantExpr::ConstantExpr(unsigned Opcode, Constant *C, const Type *Ty)
- : Constant(Ty), iType(Opcode) {
- Operands.push_back(Use(C, this));
+
+ConstantPacked::ConstantPacked(const PackedType *T,
+ const std::vector<Constant*> &V)
+ : Constant(T, ConstantPackedVal, 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 packed element doesn't match packed element type!");
+ OL->init(C, this);
+ }
}
+ConstantPacked::~ConstantPacked() {
+ delete [] OperandList;
+}
+
+/// UnaryConstantExpr - This class is private to Constants.cpp, and is used
+/// behind the scenes to implement unary constant exprs.
+class UnaryConstantExpr : public ConstantExpr {
+ Use Op;
+public:
+ UnaryConstantExpr(unsigned Opcode, Constant *C, const Type *Ty)
+ : ConstantExpr(Ty, Opcode, &Op, 1), Op(C, this) {}
+};
+
static bool isSetCC(unsigned Opcode) {
return Opcode == Instruction::SetEQ || Opcode == Instruction::SetNE ||
Opcode == Instruction::SetLT || Opcode == Instruction::SetGT ||
Opcode == Instruction::SetLE || Opcode == Instruction::SetGE;
}
-ConstantExpr::ConstantExpr(unsigned Opcode, Constant *C1, Constant *C2)
- : Constant(isSetCC(Opcode) ? Type::BoolTy : C1->getType()), iType(Opcode) {
- Operands.push_back(Use(C1, this));
- Operands.push_back(Use(C2, this));
-}
+/// BinaryConstantExpr - This class is private to Constants.cpp, and is used
+/// behind the scenes to implement binary constant exprs.
+class BinaryConstantExpr : public ConstantExpr {
+ Use Ops[2];
+public:
+ BinaryConstantExpr(unsigned Opcode, Constant *C1, Constant *C2)
+ : ConstantExpr(isSetCC(Opcode) ? Type::BoolTy : C1->getType(),
+ Opcode, Ops, 2) {
+ Ops[0].init(C1, this);
+ Ops[1].init(C2, this);
+ }
+};
-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));
-}
+/// SelectConstantExpr - This class is private to Constants.cpp, and is used
+/// behind the scenes to implement select constant exprs.
+class 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 ExtractElementConstantExpr : public ConstantExpr {
+ Use Ops[2];
+public:
+ ExtractElementConstantExpr(Constant *C1, Constant *C2)
+ : ConstantExpr(cast<PackedType>(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 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);
+ }
+};
-//===----------------------------------------------------------------------===//
-// classof implementations
+/// GetElementPtrConstantExpr - This class is private to Constants.cpp, and is
+/// used behind the scenes to implement getelementpr constant exprs.
+struct 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;
+ }
+};
-bool ConstantIntegral::classof(const Constant *CPV) {
- return CPV->getType()->isIntegral() && !isa<ConstantExpr>(CPV);
+/// 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);
}
-
-bool ConstantInt::classof(const Constant *CPV) {
- return CPV->getType()->isInteger() && !isa<ConstantExpr>(CPV);
+Constant *ConstantExpr::getNot(Constant *C) {
+ assert(isa<ConstantIntegral>(C) && "Cannot NOT a nonintegral type!");
+ return get(Instruction::Xor, C,
+ ConstantIntegral::getAllOnesValue(C->getType()));
}
-bool ConstantSInt::classof(const Constant *CPV) {
- return CPV->getType()->isSigned() && !isa<ConstantExpr>(CPV);
+Constant *ConstantExpr::getAdd(Constant *C1, Constant *C2) {
+ return get(Instruction::Add, C1, C2);
}
-bool ConstantUInt::classof(const Constant *CPV) {
- return CPV->getType()->isUnsigned() && !isa<ConstantExpr>(CPV);
+Constant *ConstantExpr::getSub(Constant *C1, Constant *C2) {
+ return get(Instruction::Sub, C1, C2);
}
-bool ConstantFP::classof(const Constant *CPV) {
- const Type *Ty = CPV->getType();
- return ((Ty == Type::FloatTy || Ty == Type::DoubleTy) &&
- !isa<ConstantExpr>(CPV));
+Constant *ConstantExpr::getMul(Constant *C1, Constant *C2) {
+ return get(Instruction::Mul, C1, C2);
}
-bool ConstantArray::classof(const Constant *CPV) {
- return isa<ArrayType>(CPV->getType()) && !isa<ConstantExpr>(CPV);
+Constant *ConstantExpr::getDiv(Constant *C1, Constant *C2) {
+ return get(Instruction::Div, C1, C2);
}
-bool ConstantStruct::classof(const Constant *CPV) {
- return isa<StructType>(CPV->getType()) && !isa<ConstantExpr>(CPV);
+Constant *ConstantExpr::getRem(Constant *C1, Constant *C2) {
+ return get(Instruction::Rem, C1, C2);
}
-
-bool ConstantPointerNull::classof(const Constant *CPV) {
- return isa<PointerType>(CPV->getType()) && !isa<ConstantExpr>(CPV) &&
- CPV->getNumOperands() == 0;
+Constant *ConstantExpr::getAnd(Constant *C1, Constant *C2) {
+ return get(Instruction::And, C1, C2);
+}
+Constant *ConstantExpr::getOr(Constant *C1, Constant *C2) {
+ return get(Instruction::Or, 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);
+}
+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);
}
-bool ConstantPointerRef::classof(const Constant *CPV) {
- return isa<PointerType>(CPV->getType()) && !isa<ConstantExpr>(CPV) &&
- CPV->getNumOperands() == 1;
+Constant *ConstantExpr::getUShr(Constant *C1, Constant *C2) {
+ if (C1->getType()->isUnsigned()) return getShr(C1, C2);
+ return getCast(getShr(getCast(C1,
+ C1->getType()->getUnsignedVersion()), C2), C1->getType());
}
+Constant *ConstantExpr::getSShr(Constant *C1, Constant *C2) {
+ if (C1->getType()->isSigned()) return getShr(C1, C2);
+ return getCast(getShr(getCast(C1,
+ C1->getType()->getSignedVersion()), C2), C1->getType());
+}
//===----------------------------------------------------------------------===//
// isValueValidForType implementations
bool ConstantSInt::isValueValidForType(const Type *Ty, int64_t Val) {
- switch (Ty->getPrimitiveID()) {
+ switch (Ty->getTypeID()) {
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);
+ return (Val <= int(INT32_MAX) && Val >= int(INT32_MIN));
case Type::LongTyID:
return true; // This is the largest type...
}
- assert(0 && "WTF?");
- return false;
}
bool ConstantUInt::isValueValidForType(const Type *Ty, uint64_t Val) {
- switch (Ty->getPrimitiveID()) {
+ switch (Ty->getTypeID()) {
default:
return false; // These can't be represented as integers!!!
case Type::ULongTyID:
return true; // This is the largest type...
}
- assert(0 && "WTF?");
- return false;
}
bool ConstantFP::isValueValidForType(const Type *Ty, double Val) {
- switch (Ty->getPrimitiveID()) {
+ switch (Ty->getTypeID()) {
default:
return false; // These can't be represented as floating point!
}
};
-//===----------------------------------------------------------------------===//
-// 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);
- }
-
- ConstantArray *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);
- }
-
- ConstantStruct *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::Shl ||
- getOpcode() == Instruction::Shr) {
- Constant *C1 = getOperand(0);
- Constant *C2 = getOperand(1);
- if (C1 == From) C1 = To;
- if (C2 == From) C2 = To;
- Replacement = ConstantExpr::getShift(getOpcode(), 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...
- if (DisableChecking)
- uncheckedReplaceAllUsesWith(Replacement);
- else
- replaceAllUsesWith(Replacement);
-
- // Delete the old constant!
- destroyConstant();
-}
-
//===----------------------------------------------------------------------===//
// Factory Function Implementation
return new ConstantClass(Ty, V);
}
};
-
+
template<class ConstantClass, class TypeClass>
struct ConvertConstantType {
static void convert(ConstantClass *OldC, const TypeClass *NewTy) {
}
namespace {
- template<class ValType, class TypeClass, class ConstantClass>
+ template<class ValType, class TypeClass, class ConstantClass,
+ bool HasLargeKey = false /*true for arrays and structs*/ >
class ValueMap : public AbstractTypeUser {
+ public:
typedef std::pair<const TypeClass*, ValType> MapKey;
typedef std::map<MapKey, ConstantClass *> MapTy;
typedef typename MapTy::iterator MapIterator;
+ 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;
+
+ /// 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.
+ std::map<ConstantClass*, MapIterator> InverseMap;
typedef std::map<const TypeClass*, MapIterator> AbstractTypeMapTy;
AbstractTypeMapTy AbstractTypeMap;
+
+ friend void Constant::clearAllValueMaps();
+ private:
+ void clear(std::vector<Constant *> &Constants) {
+ for(MapIterator I = Map.begin(); I != Map.end(); ++I)
+ Constants.push_back(I->second);
+ Map.clear();
+ AbstractTypeMap.clear();
+ InverseMap.clear();
+ }
+
public:
- // getOrCreate - Return the specified constant from the map, creating it if
- // necessary.
+ MapIterator 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.
+ MapIterator InsertOrGetItem(std::pair<MapKey, ConstantClass *> &InsertVal,
+ bool &Exists) {
+ std::pair<MapIterator, bool> IP = Map.insert(InsertVal);
+ Exists = !IP.second;
+ return IP.first;
+ }
+
+private:
+ MapIterator FindExistingElement(ConstantClass *CP) {
+ if (HasLargeKey) {
+ typename std::map<ConstantClass*, MapIterator>::iterator
+ IMI = InverseMap.find(CP);
+ assert(IMI != InverseMap.end() && IMI->second != Map.end() &&
+ IMI->second->second == CP &&
+ "InverseMap corrupt!");
+ return IMI->second;
+ }
+
+ MapIterator 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);
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 */;
-
+ MapIterator 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;
// Yes, we are removing the representative entry for this type.
// See if there are any other entries of the same type.
MapIterator 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, MapIterator I) {
+ // First, remove the old location of the specified constant in the map.
+ MapIterator 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 =
+ typename AbstractTypeMapTy::iterator I =
AbstractTypeMap.find(cast<TypeClass>(OldTy));
assert(I != AbstractTypeMap.end() &&
};
}
-
-
//---- ConstantUInt::get() and ConstantSInt::get() implementations...
//
static ValueMap< int64_t, Type, ConstantSInt> SIntConstants;
//---- ConstantFP::get() implementation...
//
-static ValueMap<double, Type, ConstantFP> FPConstants;
+namespace llvm {
+ template<>
+ struct ConstantCreator<ConstantFP, Type, uint64_t> {
+ static ConstantFP *create(const Type *Ty, uint64_t V) {
+ assert(Ty == Type::DoubleTy);
+ return new ConstantFP(Ty, BitsToDouble(V));
+ }
+ };
+ template<>
+ struct ConstantCreator<ConstantFP, Type, uint32_t> {
+ static ConstantFP *create(const Type *Ty, uint32_t V) {
+ assert(Ty == Type::FloatTy);
+ return new ConstantFP(Ty, BitsToFloat(V));
+ }
+ };
+}
+
+static ValueMap<uint64_t, Type, ConstantFP> DoubleConstants;
+static ValueMap<uint32_t, Type, ConstantFP> FloatConstants;
+
+bool ConstantFP::isNullValue() const {
+ return DoubleToBits(Val) == 0;
+}
+
+bool ConstantFP::isExactlyValue(double V) const {
+ return DoubleToBits(V) == DoubleToBits(Val);
+}
+
ConstantFP *ConstantFP::get(const Type *Ty, double V) {
- return FPConstants.getOrCreate(Ty, V);
+ if (Ty == Type::FloatTy) {
+ // Force the value through memory to normalize it.
+ return FloatConstants.getOrCreate(Ty, FloatToBits(V));
+ } else {
+ assert(Ty == Type::DoubleTy);
+ return DoubleConstants.getOrCreate(Ty, DoubleToBits(V));
+ }
+}
+
+//---- ConstantAggregateZero::get() implementation...
+//
+namespace llvm {
+ // ConstantAggregateZero does not take extra "value" argument...
+ template<class ValType>
+ struct ConstantCreator<ConstantAggregateZero, Type, ValType> {
+ static ConstantAggregateZero *create(const Type *Ty, const ValType &V){
+ return new ConstantAggregateZero(Ty);
+ }
+ };
+
+ template<>
+ struct ConvertConstantType<ConstantAggregateZero, Type> {
+ static void convert(ConstantAggregateZero *OldC, const Type *NewTy) {
+ // Make everyone now use a constant of the new type...
+ Constant *New = ConstantAggregateZero::get(NewTy);
+ assert(New != OldC && "Didn't replace constant??");
+ OldC->uncheckedReplaceAllUsesWith(New);
+ OldC->destroyConstant(); // This constant is now dead, destroy it.
+ }
+ };
+}
+
+static ValueMap<char, Type, ConstantAggregateZero> AggZeroConstants;
+
+static char getValType(ConstantAggregateZero *CPZ) { return 0; }
+
+Constant *ConstantAggregateZero::get(const Type *Ty) {
+ return AggZeroConstants.getOrCreate(Ty, 0);
+}
+
+// destroyConstant - Remove the constant from the constant table...
+//
+void ConstantAggregateZero::destroyConstant() {
+ AggZeroConstants.remove(this);
+ destroyConstantImpl();
}
//---- ConstantArray::get() implementation...
};
}
-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;
+}
-ConstantArray *ConstantArray::get(const ArrayType *Ty,
- const std::vector<Constant*> &V) {
- return ArrayConstants.getOrCreate(Ty, V);
+typedef ValueMap<std::vector<Constant*>, ArrayType,
+ ConstantArray, true /*largekey*/> ArrayConstantsTy;
+static ArrayConstantsTy ArrayConstants;
+
+Constant *ConstantArray::get(const ArrayType *Ty,
+ const std::vector<Constant*> &V) {
+ // If this is an all-zero array, return a ConstantAggregateZero object
+ if (!V.empty()) {
+ Constant *C = V[0];
+ if (!C->isNullValue())
+ 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 ConstantAggregateZero::get(Ty);
}
// destroyConstant - Remove the constant from the constant table...
// contain the specified string. A null terminator is added to the specified
// string so that it may be used in a natural way...
//
-ConstantArray *ConstantArray::get(const std::string &Str) {
+Constant *ConstantArray::get(const std::string &Str) {
std::vector<Constant*> ElementVals;
for (unsigned i = 0; i < Str.length(); ++i)
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.
+bool ConstantArray::isString() const {
+ // Check the element type for sbyte or ubyte...
+ if (getType()->getElementType() != Type::UByteTy &&
+ getType()->getElementType() != Type::SByteTy)
+ return false;
+ // Check the elements to make sure they are all integers, not constant
+ // expressions.
+ for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
+ if (!isa<ConstantInt>(getOperand(i)))
+ return false;
+ return true;
+}
+
// getAsString - If the sub-element type of this array is either sbyte or ubyte,
// then this method converts the array to an std::string and returns it.
// Otherwise, it asserts out.
//
std::string ConstantArray::getAsString() const {
- assert((getType()->getElementType() == Type::UByteTy ||
- getType()->getElementType() == Type::SByteTy) && "Not a string!");
-
+ assert(isString() && "Not a string!");
std::string Result;
for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
Result += (char)cast<ConstantInt>(getOperand(i))->getRawValue();
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 StructConstantsTy StructConstants;
-ConstantStruct *ConstantStruct::get(const StructType *Ty,
- const std::vector<Constant*> &V) {
- return StructConstants.getOrCreate(Ty, V);
+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 ConstantAggregateZero::get(Ty);
+}
+
+Constant *ConstantStruct::get(const std::vector<Constant*> &V) {
+ 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), V);
}
// destroyConstant - Remove the constant from the constant table...
destroyConstantImpl();
}
+//---- ConstantPacked::get() implementation...
+//
+namespace llvm {
+ template<>
+ struct ConvertConstantType<ConstantPacked, PackedType> {
+ static void convert(ConstantPacked *OldC, const PackedType *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 = ConstantPacked::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(ConstantPacked *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 ValueMap<std::vector<Constant*>, PackedType,
+ ConstantPacked> PackedConstants;
+
+Constant *ConstantPacked::get(const PackedType *Ty,
+ const std::vector<Constant*> &V) {
+ // If this is an all-zero packed, return a ConstantAggregateZero object
+ if (!V.empty()) {
+ Constant *C = V[0];
+ if (!C->isNullValue())
+ return PackedConstants.getOrCreate(Ty, V);
+ for (unsigned i = 1, e = V.size(); i != e; ++i)
+ if (V[i] != C)
+ return PackedConstants.getOrCreate(Ty, V);
+ }
+ return ConstantAggregateZero::get(Ty);
+}
+
+Constant *ConstantPacked::get(const std::vector<Constant*> &V) {
+ assert(!V.empty() && "Cannot infer type if V is empty");
+ return get(PackedType::get(V.front()->getType(),V.size()), V);
+}
+
+// destroyConstant - Remove the constant from the constant table...
+//
+void ConstantPacked::destroyConstant() {
+ PackedConstants.remove(this);
+ destroyConstantImpl();
+}
+
//---- ConstantPointerNull::get() implementation...
//
static ValueMap<char, PointerType, ConstantPointerNull> NullPtrConstants;
+static char getValType(ConstantPointerNull *) {
+ return 0;
+}
+
+
ConstantPointerNull *ConstantPointerNull::get(const PointerType *Ty) {
return NullPtrConstants.getOrCreate(Ty, 0);
}
}
-//---- 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 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 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);
+ return new UnaryConstantExpr(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]);
-
+ return new BinaryConstantExpr(V.first, V.second[0], V.second[1]);
+ if (V.first == Instruction::Select)
+ return new SelectConstantExpr(V.second[0], V.second[1], V.second[2]);
+ if (V.first == Instruction::ExtractElement)
+ return new ExtractElementConstantExpr(V.second[0], V.second[1]);
+ if (V.first == Instruction::InsertElement)
+ return new InsertElementConstantExpr(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);
+ return new GetElementPtrConstantExpr(V.second[0], IdxList, Ty);
}
};
case Instruction::Cast:
New = ConstantExpr::getCast(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(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);
break;
}
-
+
assert(New != OldC && "Didn't replace constant??");
OldC->uncheckedReplaceAllUsesWith(New);
OldC->destroyConstant(); // This constant is now dead, destroy it.
} // end namespace llvm
+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);
+}
+
static ValueMap<ExprMapKeyType, Type, ConstantExpr> ExprConstants;
Constant *ConstantExpr::getCast(Constant *C, const Type *Ty) {
return ExprConstants.getOrCreate(Ty, Key);
}
+Constant *ConstantExpr::getSignExtend(Constant *C, const Type *Ty) {
+ assert(C->getType()->isIntegral() && Ty->isIntegral() &&
+ C->getType()->getPrimitiveSize() <= Ty->getPrimitiveSize() &&
+ "This is an illegal sign extension!");
+ if (C->getType() != Type::BoolTy) {
+ C = ConstantExpr::getCast(C, C->getType()->getSignedVersion());
+ return ConstantExpr::getCast(C, Ty);
+ } else {
+ if (C == ConstantBool::True)
+ return ConstantIntegral::getAllOnesValue(Ty);
+ else
+ return ConstantIntegral::getNullValue(Ty);
+ }
+}
+
+Constant *ConstantExpr::getZeroExtend(Constant *C, const Type *Ty) {
+ assert(C->getType()->isIntegral() && Ty->isIntegral() &&
+ C->getType()->getPrimitiveSize() <= Ty->getPrimitiveSize() &&
+ "This is an illegal zero extension!");
+ if (C->getType() != Type::BoolTy)
+ C = ConstantExpr::getCast(C, C->getType()->getUnsignedVersion());
+ return ConstantExpr::getCast(C, Ty);
+}
+
+Constant *ConstantExpr::getSizeOf(const Type *Ty) {
+ // sizeof is implemented as: (ulong) gep (Ty*)null, 1
+ return getCast(
+ getGetElementPtr(getNullValue(PointerType::get(Ty)),
+ std::vector<Constant*>(1, ConstantInt::get(Type::UIntTy, 1))),
+ Type::ULongTy);
+}
+
+Constant *ConstantExpr::getPtrPtrFromArrayPtr(Constant *C) {
+ // pointer from array is implemented as: getelementptr arr ptr, 0, 0
+ static std::vector<Constant*> Indices(2, ConstantUInt::get(Type::UIntTy, 0));
+
+ return ConstantExpr::getGetElementPtr(C, Indices);
+}
+
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(C1->getType() == C2->getType() &&
"Operand types in binary constant expression should match");
- if (ReqTy == C1->getType())
+ if (ReqTy == C1->getType() || (Instruction::isRelational(Opcode) &&
+ ReqTy == Type::BoolTy))
if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
return FC; // Fold a few common cases...
return ExprConstants.getOrCreate(ReqTy, Key);
}
-/// getShift - Return a shift left or shift right constant expr
+Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2) {
+#ifndef NDEBUG
+ switch (Opcode) {
+ case Instruction::Add: case Instruction::Sub:
+ case Instruction::Mul: case Instruction::Div:
+ case Instruction::Rem:
+ assert(C1->getType() == C2->getType() && "Op types should be identical!");
+ assert((C1->getType()->isInteger() || C1->getType()->isFloatingPoint() ||
+ isa<PackedType>(C1->getType())) &&
+ "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()->isIntegral() || isa<PackedType>(C1->getType())) &&
+ "Tried to create a logical operation on a non-integral type!");
+ break;
+ case Instruction::SetLT: case Instruction::SetGT: case Instruction::SetLE:
+ case Instruction::SetGE: case Instruction::SetEQ: case Instruction::SetNE:
+ assert(C1->getType() == C2->getType() && "Op types should be identical!");
+ break;
+ case Instruction::Shl:
+ case Instruction::Shr:
+ assert(C2->getType() == Type::UByteTy && "Shift should be by ubyte!");
+ assert((C1->getType()->isInteger() || isa<PackedType>(C1->getType())) &&
+ "Tried to create a shift operation on a non-integer type!");
+ break;
+ default:
+ break;
+ }
+#endif
+
+ if (Instruction::isRelational(Opcode))
+ return getTy(Type::BoolTy, Opcode, C1, C2);
+ else
+ return getTy(C1->getType(), Opcode, 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(V1->getType() == V2->getType() && "Select value types must match!");
+ assert(V1->getType()->isFirstClassType() && "Cannot select aggregate type!");
+
+ if (ReqTy == V1->getType())
+ if (Constant *SC = ConstantFoldSelectInstruction(C, V1, V2))
+ return SC; // Fold common cases
+
+ 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);
+}
+
+/// 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(C1->getType()->isIntegral() && C2->getType() == Type::UByteTy &&
"Invalid operand types for Shift constant expr!");
- if (Constant *FC = ConstantFoldShiftInstruction(Opcode, C1, C2))
+ if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
return FC; // Fold a few common cases...
// Look up the constant in the table first to ensure uniqueness
Constant *ConstantExpr::getGetElementPtrTy(const Type *ReqTy, Constant *C,
- const std::vector<Constant*> &IdxList) {
+ const std::vector<Value*> &IdxList) {
+ assert(GetElementPtrInst::getIndexedType(C->getType(), IdxList, true) &&
+ "GEP indices invalid!");
+
if (Constant *FC = ConstantFoldGetElementPtr(C, IdxList))
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);
+ std::vector<Constant*> ArgVec;
+ ArgVec.reserve(IdxList.size()+1);
+ ArgVec.push_back(C);
+ for (unsigned i = 0, e = IdxList.size(); i != e; ++i)
+ ArgVec.push_back(cast<Constant>(IdxList[i]));
+ const ExprMapKeyType &Key = std::make_pair(Instruction::GetElementPtr,ArgVec);
return ExprConstants.getOrCreate(ReqTy, Key);
}
const Type *Ty = GetElementPtrInst::getIndexedType(C->getType(), VIdxList,
true);
assert(Ty && "GEP indices invalid!");
+ return getGetElementPtrTy(PointerType::get(Ty), C, VIdxList);
+}
- if (C->isNullValue()) {
- bool isNull = true;
- for (unsigned i = 0, e = IdxList.size(); i != e; ++i)
- if (!IdxList[i]->isNullValue()) {
- isNull = false;
- break;
- }
- if (isNull) return ConstantPointerNull::get(PointerType::get(Ty));
- }
-
+Constant *ConstantExpr::getGetElementPtr(Constant *C,
+ const std::vector<Value*> &IdxList) {
+ // Get the result type of the getelementptr!
+ const Type *Ty = GetElementPtrInst::getIndexedType(C->getType(), IdxList,
+ true);
+ assert(Ty && "GEP indices invalid!");
return getGetElementPtrTy(PointerType::get(Ty), C, IdxList);
}
+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 = std::make_pair(Instruction::ExtractElement,ArgVec);
+ return ExprConstants.getOrCreate(ReqTy, Key);
+}
+
+Constant *ConstantExpr::getExtractElement(Constant *Val, Constant *Idx) {
+ assert(isa<PackedType>(Val->getType()) &&
+ "Tried to create extractelement operation on non-packed type!");
+ assert(Idx->getType() == Type::UIntTy &&
+ "Extractelement index must be uint type!");
+ return getExtractElementTy(cast<PackedType>(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 = std::make_pair(Instruction::InsertElement,ArgVec);
+ return ExprConstants.getOrCreate(ReqTy, Key);
+}
+
+Constant *ConstantExpr::getInsertElement(Constant *Val, Constant *Elt,
+ Constant *Idx) {
+ assert(isa<PackedType>(Val->getType()) &&
+ "Tried to create insertelement operation on non-packed type!");
+ assert(Elt->getType() == cast<PackedType>(Val->getType())->getElementType()
+ && "Insertelement types must match!");
+ assert(Idx->getType() == Type::UIntTy &&
+ "Insertelement index must be uint type!");
+ return getInsertElementTy(cast<PackedType>(Val->getType())->getElementType(),
+ Val, Elt, Idx);
+}
// destroyConstant - Remove the constant from the constant table...
//
return Instruction::getOpcodeName(getOpcode());
}
-unsigned Constant::mutateReferences(Value *OldV, Value *NewV) {
- // Uses of constant pointer refs are global values, not constants!
- if (ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(this)) {
- GlobalValue *NewGV = cast<GlobalValue>(NewV);
- GlobalValue *OldGV = CPR->getValue();
+//===----------------------------------------------------------------------===//
+// replaceUsesOfWithOnConstant implementations
+
+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);
+
+ unsigned OperandToUpdate = U-OperandList;
+ assert(getOperand(OperandToUpdate) == From && "ReplaceAllUsesWith broken!");
+
+ std::pair<ArrayConstantsTy::MapKey, ConstantArray*> 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;
+ 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;
+ ArrayConstantsTy::MapIterator 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.
+ setOperand(OperandToUpdate, 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!");
- assert(OldGV == OldV && "Cannot mutate old value if I'm not using it!");
- Operands[0] = NewGV;
- OldGV->getParent()->mutateConstantPointerRef(OldGV, NewGV);
- return 1;
+ std::pair<StructConstantsTy::MapKey, ConstantStruct*> 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 {
- Constant *NewC = cast<Constant>(NewV);
- unsigned NumReplaced = 0;
- for (unsigned i = 0, N = getNumOperands(); i != N; ++i)
- if (Operands[i] == OldV) {
- ++NumReplaced;
- Operands[i] = NewC;
+ 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::MapIterator 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 ConstantPacked::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 = ConstantPacked::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) {
+ 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 (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 (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();
+}
+
+
+
+/// clearAllValueMaps - This method frees all internal memory used by the
+/// constant subsystem, which can be used in environments where this memory
+/// is otherwise reported as a leak.
+void Constant::clearAllValueMaps() {
+ std::vector<Constant *> Constants;
+
+ DoubleConstants.clear(Constants);
+ FloatConstants.clear(Constants);
+ SIntConstants.clear(Constants);
+ UIntConstants.clear(Constants);
+ AggZeroConstants.clear(Constants);
+ ArrayConstants.clear(Constants);
+ StructConstants.clear(Constants);
+ PackedConstants.clear(Constants);
+ NullPtrConstants.clear(Constants);
+ UndefValueConstants.clear(Constants);
+ ExprConstants.clear(Constants);
+
+ for (std::vector<Constant *>::iterator I = Constants.begin(),
+ E = Constants.end(); I != E; ++I)
+ (*I)->dropAllReferences();
+ for (std::vector<Constant *>::iterator I = Constants.begin(),
+ E = Constants.end(); I != E; ++I)
+ (*I)->destroyConstantImpl();
+ Constants.clear();
+}
+
+/// 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;
+ }
}
- return NumReplaced;
+ }
+ } else if (Constant *C = dyn_cast<Constant>(this)) {
+ if (GlobalValue *GV = dyn_cast<GlobalValue>(C))
+ return GV->getStringValue(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))->getRawValue();
+ return CE->getOperand(0)->getStringValue(Offset);
+ }
+ }
+ }
}
+ return "";
}
projects / oota-llvm.git / blobdiff