//
//===----------------------------------------------------------------------===//
-#define __STDC_LIMIT_MACROS // Get defs for INT64_MAX and friends...
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/iMemory.h"
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
+ // constants are implicitly dependant on the module that is being deleted,
+ // but they don't know that. Because we only find out when the CPV is
+ // deleted, we must now notify all of our users (that should only be
+ // Constants) that they are, in fact, invalid now and should be deleted.
+ //
+ while (!use_empty()) {
+ 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";
+#endif
+ assert(isa<Constant>(V) && "References remain to Constant being destroyed");
+ Constant *CPV = cast<Constant>(V);
+ CPV->destroyConstant();
+
+ // The constant should remove itself from our use list...
+ assert((use_empty() || use_back() != V) && "Constant not removed!");
+ }
+
+ // Value has no outstanding references it is safe to delete it now...
+ delete this;
+}
+
// Static constructor to create a '0' constant of arbitrary type...
Constant *Constant::getNullValue(const Type *Ty) {
switch (Ty->getPrimitiveID()) {
}
}
-void Constant::destroyConstantImpl() {
- // When a Constant is destroyed, there may be lingering
- // references to the constant by other constants in the constant pool. These
- // constants are implicitly dependant on the module that is being deleted,
- // but they don't know that. Because we only find out when the CPV is
- // deleted, we must now notify all of our users (that should only be
- // Constants) that they are, in fact, invalid now and should be deleted.
- //
- while (!use_empty()) {
- 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";
-#endif
- assert(isa<Constant>(V) && "References remain to Constant being destroyed");
- Constant *CPV = cast<Constant>(V);
- CPV->destroyConstant();
+// 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);
+ }
- // The constant should remove itself from our use list...
- assert((use_empty() || use_back() != V) && "Constant not removed!");
+ case Type::UByteTyID:
+ case Type::UShortTyID:
+ case Type::UIntTyID:
+ case Type::ULongTyID: return getAllOnesValue(Ty);
+
+ default: return 0;
}
+}
- // Value has no outstanding references it is safe to delete it now...
- delete this;
+// 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);
+
+ default: return 0;
+ }
+}
+
+// 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;
+ }
}
+
//===----------------------------------------------------------------------===//
// ConstantXXX Classes
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// Normal Constructors
-ConstantBool::ConstantBool(bool V) : Constant(Type::BoolTy) {
+ConstantBool::ConstantBool(bool V) : ConstantIntegral(Type::BoolTy) {
Val = V;
}
-ConstantInt::ConstantInt(const Type *Ty, uint64_t V) : Constant(Ty) {
+ConstantInt::ConstantInt(const Type *Ty, uint64_t V) : ConstantIntegral(Ty) {
Val.Unsigned = V;
}
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!");
}
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!");
}
ConstantArray::ConstantArray(const ArrayType *T,
const std::vector<Constant*> &V) : Constant(T) {
- for (unsigned i = 0; i < V.size(); i++) {
+ Operands.reserve(V.size());
+ for (unsigned i = 0, e = V.size(); i != e; ++i) {
assert(V[i]->getType() == T->getElementType());
Operands.push_back(Use(V[i], this));
}
const StructType::ElementTypes &ETypes = T->getElementTypes();
assert(V.size() == ETypes.size() &&
"Invalid initializer vector for constant structure");
- for (unsigned i = 0; i < V.size(); i++) {
+ Operands.reserve(V.size());
+ for (unsigned i = 0, e = V.size(); i != e; ++i) {
assert(V[i]->getType() == ETypes[i]);
Operands.push_back(Use(V[i], this));
}
Operands.push_back(Use(GV, this));
}
-ConstantExpr::ConstantExpr(unsigned opCode, Constant *C, const Type *Ty)
- : Constant(Ty), iType(opCode) {
+ConstantExpr::ConstantExpr(unsigned Opcode, Constant *C, const Type *Ty)
+ : Constant(Ty), iType(Opcode) {
Operands.push_back(Use(C, this));
}
-ConstantExpr::ConstantExpr(unsigned opCode, Constant* C1,
- Constant* C2, const Type *Ty)
- : Constant(Ty), iType(opCode) {
+ConstantExpr::ConstantExpr(unsigned Opcode, Constant *C1, Constant *C2)
+ : Constant(C1->getType()), iType(Opcode) {
Operands.push_back(Use(C1, this));
Operands.push_back(Use(C2, this));
}
-ConstantExpr::ConstantExpr(unsigned opCode, Constant* C,
- const std::vector<Constant*> &IdxList, const Type *Ty)
- : Constant(Ty), iType(opCode) {
+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)
//===----------------------------------------------------------------------===//
// classof implementations
-bool ConstantInt::classof(const Constant *CPV) {
+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);
}
}
};
+//===----------------------------------------------------------------------===//
+// replaceUsesOfWithOnConstant implementations
+
+void ConstantArray::replaceUsesOfWithOnConstant(Value *From, Value *To) {
+ 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...
+ replaceAllUsesWith(Replacement);
+
+ // Delete the old constant!
+ destroyConstant();
+}
+
+void ConstantStruct::replaceUsesOfWithOnConstant(Value *From, Value *To) {
+ 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...
+ replaceAllUsesWith(Replacement);
+
+ // Delete the old constant!
+ destroyConstant();
+}
+
+void ConstantPointerRef::replaceUsesOfWithOnConstant(Value *From, Value *To) {
+ 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...
+ replaceAllUsesWith(Replacement);
+
+ // Delete the old constant!
+ destroyConstant();
+ } else {
+ // Just replace ourselves with the To value specified.
+ replaceAllUsesWith(To);
+
+ // Delete the old constant!
+ destroyConstant();
+ }
+}
+
+void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *To) {
+ assert(isa<Constant>(To) && "Cannot make Constant refer to non-constant!");
+
+ ConstantExpr *Replacement = 0;
+ if (getOpcode() == Instruction::GetElementPtr) {
+ std::vector<Constant*> Indices;
+ Constant *Pointer = cast<Constant>(getOperand(0));
+ Indices.reserve(getNumOperands()-1);
+ if (Pointer == From) Pointer = cast<Constant>(To);
+
+ for (unsigned i = 1, e = getNumOperands(); i != e; ++i) {
+ Constant *Val = cast<Constant>(getOperand(i));
+ if (Val == From) Val = cast<Constant>(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(cast<Constant>(To), getType());
+ } else if (getNumOperands() == 2) {
+ Constant *C1 = cast<Constant>(getOperand(0));
+ Constant *C2 = cast<Constant>(getOperand(1));
+ if (C1 == From) C1 = cast<Constant>(To);
+ if (C2 == From) C2 = cast<Constant>(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...
+ replaceAllUsesWith(Replacement);
+
+ // Delete the old constant!
+ destroyConstant();
+}
+
+
+
//===----------------------------------------------------------------------===//
// Factory Function Implementation
destroyConstantImpl();
}
+// 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 {
+ std::string Result;
+ if (getType()->getElementType() == Type::SByteTy)
+ for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
+ Result += (char)cast<ConstantSInt>(getOperand(i))->getValue();
+ else {
+ assert(getType()->getElementType() == Type::UByteTy && "Not a string!");
+ for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
+ Result += (char)cast<ConstantUInt>(getOperand(i))->getValue();
+ }
+ return Result;
+}
+
+
//---- ConstantStruct::get() implementation...
//
static ValueMap<std::vector<Constant*>, ConstantStruct> StructConstants;
destroyConstantImpl();
}
+
//---- ConstantPointerNull::get() implementation...
//
static ValueMap<char, ConstantPointerNull> NullPtrConstants;
return Result;
}
+// destroyConstant - Remove the constant from the constant table...
+//
+void ConstantPointerNull::destroyConstant() {
+ NullPtrConstants.remove(this);
+ destroyConstantImpl();
+}
+
+
//---- ConstantPointerRef::get() implementation...
//
ConstantPointerRef *ConstantPointerRef::get(GlobalValue *GV) {
return GV->getParent()->getConstantPointerRef(GV);
}
+// destroyConstant - Remove the constant from the constant table...
+//
+void ConstantPointerRef::destroyConstant() {
+ getValue()->getParent()->destroyConstantPointerRef(this);
+ destroyConstantImpl();
+}
+
+
//---- ConstantExpr::get() implementations...
-// Return NULL on invalid expressions.
//
typedef pair<unsigned, vector<Constant*> > ExprMapKeyType;
static ValueMap<const ExprMapKeyType, ConstantExpr> ExprConstants;
-ConstantExpr *ConstantExpr::get(unsigned Opcode, Constant *C, const Type *Ty) {
+ConstantExpr *ConstantExpr::getCast(Constant *C, const Type *Ty) {
// Look up the constant in the table first to ensure uniqueness
vector<Constant*> argVec(1, C);
- const ExprMapKeyType &Key = make_pair(Opcode, argVec);
+ const ExprMapKeyType &Key = make_pair(Instruction::Cast, argVec);
ConstantExpr *Result = ExprConstants.get(Ty, Key);
if (Result) return Result;
// Its not in the table so create a new one and put it in the table.
- // Check the operands for consistency first
- assert(Opcode == Instruction::Cast ||
- (Opcode >= Instruction::FirstUnaryOp &&
- Opcode < Instruction::NumUnaryOps) &&
- "Invalid opcode in unary ConstantExpr!");
-
- // type of operand will not match result for Cast operation
- assert((Opcode == Instruction::Cast || Ty == C->getType()) &&
- "Type of operand in unary constant expression should match result");
-
- Result = new ConstantExpr(Opcode, C, Ty);
+ Result = new ConstantExpr(Instruction::Cast, C, Ty);
ExprConstants.add(Ty, Key, Result);
return Result;
}
-ConstantExpr *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2,
- const Type *Ty) {
-
+ConstantExpr *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2) {
// Look up the constant in the table first to ensure uniqueness
vector<Constant*> argVec(1, C1); argVec.push_back(C2);
const ExprMapKeyType &Key = make_pair(Opcode, argVec);
- ConstantExpr *Result = ExprConstants.get(Ty, Key);
+ ConstantExpr *Result = ExprConstants.get(C1->getType(), Key);
if (Result) return Result;
// Its not in the table so create a new one and put it in the table.
// Check the operands for consistency first
- assert((Opcode >= Instruction::FirstBinaryOp &&
- Opcode < Instruction::NumBinaryOps) &&
- "Invalid opcode in binary constant expression");
+ assert((Opcode >= Instruction::BinaryOpsBegin &&
+ Opcode < Instruction::BinaryOpsEnd) &&
+ "Invalid opcode in binary constant expression");
- assert(Ty == C1->getType() && Ty == C2->getType() &&
- "Operand types in binary constant expression should match result");
+ assert(C1->getType() == C2->getType() &&
+ "Operand types in binary constant expression should match");
- Result = new ConstantExpr(Opcode, C1, C2, Ty);
- ExprConstants.add(Ty, Key, Result);
+ Result = new ConstantExpr(Opcode, C1, C2);
+ ExprConstants.add(C1->getType(), Key, Result);
return Result;
}
-ConstantExpr *ConstantExpr::get(unsigned Opcode, Constant *C,
- const std::vector<Constant*> &IdxList,
- const Type *Ty) {
+ConstantExpr *ConstantExpr::getGetElementPtr(Constant *C,
+ const std::vector<Constant*> &IdxList) {
+ const Type *Ty = C->getType();
// Look up the constant in the table first to ensure uniqueness
vector<Constant*> argVec(1, C);
argVec.insert(argVec.end(), IdxList.begin(), IdxList.end());
- const ExprMapKeyType &Key = make_pair(Opcode, argVec);
+ const ExprMapKeyType &Key = make_pair(Instruction::GetElementPtr, argVec);
ConstantExpr *Result = ExprConstants.get(Ty, Key);
if (Result) return Result;
-
+
// Its not in the table so create a new one and put it in the table.
// Check the operands for consistency first
- // Must be a getElementPtr. Check for valid getElementPtr expression.
//
- assert(Opcode == Instruction::GetElementPtr &&
- "Operator other than GetElementPtr used with an index list");
-
assert(isa<PointerType>(Ty) &&
"Non-pointer type for constant GelElementPtr expression");
+ // Check that the indices list is valid...
std::vector<Value*> ValIdxList(IdxList.begin(), IdxList.end());
- const Type *fldType = GetElementPtrInst::getIndexedType(C->getType(),
- ValIdxList, true);
- assert(fldType && "Invalid index list for constant GelElementPtr expression");
-
- assert(cast<PointerType>(Ty)->getElementType() == fldType &&
- "Type for constant GelElementPtr expression doesn't match field type");
+ const Type *DestTy = GetElementPtrInst::getIndexedType(Ty, ValIdxList, true);
+ assert(DestTy && "Invalid index list for constant GelElementPtr expression");
- Result = new ConstantExpr(Opcode, C, IdxList, Ty);
+ Result = new ConstantExpr(C, IdxList, PointerType::get(DestTy));
ExprConstants.add(Ty, Key, Result);
return Result;
}
destroyConstantImpl();
}
-const char *ConstantExpr::getOpcodeName(unsigned Opcode) {
- return Instruction::getOpcodeName(Opcode);
+const char *ConstantExpr::getOpcodeName() const {
+ 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();
-//---- ConstantPointerRef::mutateReferences() implementation...
-//
-unsigned ConstantPointerRef::mutateReferences(Value *OldV, Value *NewV) {
- assert(getValue() == OldV && "Cannot mutate old value if I'm not using it!");
- GlobalValue *NewGV = cast<GlobalValue>(NewV);
- getValue()->getParent()->mutateConstantPointerRef(getValue(), NewGV);
- Operands[0] = NewGV;
- return 1;
-}
-
+ assert(OldGV == OldV && "Cannot mutate old value if I'm not using it!");
-//---- ConstantPointerExpr::mutateReferences() implementation...
-//
-unsigned ConstantExpr::mutateReferences(Value* OldV, Value *NewV) {
- unsigned NumReplaced = 0;
- Constant *NewC = cast<Constant>(NewV);
- for (unsigned i = 0, N = getNumOperands(); i != N; ++i)
- if (Operands[i] == OldV) {
- ++NumReplaced;
- Operands[i] = NewC;
- }
- return NumReplaced;
+ OldGV->getParent()->mutateConstantPointerRef(OldGV, NewGV);
+ Operands[0] = NewGV;
+ return 1;
+ } 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;
+ }
+ return NumReplaced;
+ }
}
projects / oota-llvm.git / blobdiff