virtual BasicBlock *getSuccessorV(unsigned idx) const = 0;
virtual unsigned getNumSuccessorsV() const = 0;
virtual void setSuccessorV(unsigned idx, BasicBlock *B) = 0;
-public:
+public:
/// Return the number of successors that this terminator has.
unsigned getNumSuccessors() const {
return getNumSuccessorsV();
}
};
-
//===----------------------------------------------------------------------===//
// UnaryInstruction Class
//===----------------------------------------------------------------------===//
: Instruction(Ty, iType, &Op<0>(), 1, IAE) {
Op<0>() = V;
}
+
public:
// allocate space for exactly one operand
void *operator new(size_t s) {
class BinaryOperator : public Instruction {
void *operator new(size_t, unsigned) = delete;
+
protected:
void init(BinaryOps iType);
BinaryOperator(BinaryOps iType, Value *S1, Value *S2, Type *Ty,
BO->setHasNoSignedWrap(true);
return BO;
}
-
+
static BinaryOperator *CreateNUW(BinaryOps Opc, Value *V1, Value *V2,
const Twine &Name = "") {
BinaryOperator *BO = Create(Opc, V1, V2, Name);
BO->setHasNoUnsignedWrap(true);
return BO;
}
-
+
static BinaryOperator *CreateExact(BinaryOps Opc, Value *V1, Value *V2,
const Twine &Name = "") {
BinaryOperator *BO = Create(Opc, V1, V2, Name);
DEFINE_HELPERS(LShr, Exact) // CreateExactLShr
#undef DEFINE_HELPERS
-
+
/// Helper functions to construct and inspect unary operations (NEG and NOT)
/// via binary operators SUB and XOR:
///
/// Convenience method to copy supported wrapping, exact, and fast-math flags
/// from V to this instruction.
void copyIRFlags(const Value *V);
-
+
/// Logical 'and' of any supported wrapping, exact, and fast-math flags of
/// V and this instruction.
void andIRFlags(const Value *V);
/// @brief Base class of casting instructions.
class CastInst : public UnaryInstruction {
void anchor() override;
+
protected:
/// @brief Constructor with insert-before-instruction semantics for subclasses
CastInst(Type *Ty, unsigned iType, Value *S,
: UnaryInstruction(Ty, iType, S, InsertAtEnd) {
setName(NameStr);
}
+
public:
/// Provides a way to construct any of the CastInst subclasses using an
/// opcode instead of the subclass's constructor. The opcode must be in the
Value *S, ///< The pointer value to be casted (operand 0)
Type *Ty, ///< The type to which cast should be made
const Twine &Name = "", ///< Name for the instruction
- Instruction *InsertBefore = 0 ///< Place to insert the instruction
+ Instruction *InsertBefore = nullptr ///< Place to insert the instruction
);
/// @brief Create a BitCast, a PtrToInt, or an IntToPTr cast instruction.
Value *S, ///< The pointer value to be casted (operand 0)
Type *Ty, ///< The type to which cast should be made
const Twine &Name = "", ///< Name for the instruction
- Instruction *InsertBefore = 0 ///< Place to insert the instruction
+ Instruction *InsertBefore = nullptr ///< Place to insert the instruction
);
/// @brief Create a ZExt, BitCast, or Trunc for int -> int casts.
class CmpInst : public Instruction {
void *operator new(size_t, unsigned) = delete;
CmpInst() = delete;
+
protected:
CmpInst(Type *ty, Instruction::OtherOps op, unsigned short pred,
Value *LHS, Value *RHS, const Twine &Name = "",
BasicBlock *InsertAtEnd);
void anchor() override; // Out of line virtual method.
+
public:
/// This enumeration lists the possible predicates for CmpInst subclasses.
/// Values in the range 0-31 are reserved for FCmpInst, while values in the
bool isFPPredicate() const { return isFPPredicate(getPredicate()); }
bool isIntPredicate() const { return isIntPredicate(getPredicate()); }
-
/// For example, EQ -> NE, UGT -> ULE, SLT -> SGE,
/// OEQ -> UNE, UGT -> OLE, OLT -> UGE, etc.
/// @returns the inverse predicate for the instruction's current predicate.
}
return Type::getInt1Ty(opnd_type->getContext());
}
+
private:
// Shadow Value::setValueSubclassData with a private forwarding method so that
// subclasses cannot accidentally use it.
}
};
-
// FIXME: these are redundant if CmpInst < BinaryOperator
template <>
struct OperandTraits<CmpInst> : public FixedNumOperandTraits<CmpInst, 2> {
DEFINE_TRANSPARENT_OPERAND_ACCESSORS(CmpInst, Value)
-} // End llvm namespace
+/// \brief A lightweight accessor for an operand bundle meant to be passed
+/// around by value.
+struct OperandBundleUse {
+ StringRef Tag;
+ ArrayRef<Use> Inputs;
+
+ OperandBundleUse() {}
+ explicit OperandBundleUse(StringRef Tag, ArrayRef<Use> Inputs)
+ : Tag(Tag), Inputs(Inputs) {}
+};
+
+/// \brief A container for an operand bundle being viewed as a set of values
+/// rather than a set of uses.
+///
+/// Unlike OperandBundleUse, OperandBundleDefT owns the memory it carries, and
+/// so it is possible to create and pass around "self-contained" instances of
+/// OperandBundleDef and ConstOperandBundleDef.
+template <typename InputTy> struct OperandBundleDefT {
+ std::string Tag;
+ std::vector<InputTy> Inputs;
+
+ OperandBundleDefT() {}
+ explicit OperandBundleDefT(StringRef Tag, const std::vector<InputTy> &Inputs)
+ : Tag(Tag), Inputs(Inputs) {}
+};
+
+typedef OperandBundleDefT<Value *> OperandBundleDef;
+typedef OperandBundleDefT<const Value *> ConstOperandBundleDef;
+
+/// \brief A mixin to add operand bundle functionality to llvm instruction
+/// classes.
+///
+/// OperandBundleUser uses the descriptor area co-allocated with the host User
+/// to store some meta information about which operands are "normal" operands,
+/// and which ones belong to some operand bundle.
+///
+/// The layout of an operand bundle user is
+///
+/// +-------uint32_t End---------------------------------+
+/// / \
+/// / +------uint32_t Begin------------------+ \
+/// / / \ \
+/// ^ ^ v v
+/// |------|------|----|----|----|----|----|---------|----|---------|----|-----
+/// | BOI0 | BOI1 | .. | DU | U0 | U1 | .. | BOI0_U0 | .. | BOI1_U0 | .. | Un
+/// |------|------|----|----|----|----|----|---------|----|---------|----|-----
+/// v v ^ ^
+/// \ \ / /
+/// \ +------uint32_t Begin----------+ /
+/// \ /
+/// +-------uint32_t End-------------------------+
+///
+///
+/// BOI0, BOI1 ... are descriptions of operand bundles in this User's use list.
+/// These descriptions are installed and managed by this class, and they're all
+/// instances of OperandBundleUser<T>::BundleOpInfo.
+///
+/// DU is an additional descriptor installed by User's 'operator new' to keep
+/// track of the 'BOI0 ... BOIN' co-allocation. OperandBundleUser does not
+/// access or modify DU in any way, it's an implementation detail private to
+/// User.
+///
+/// The regular Use& vector for the User starts at U0. The operand bundle uses
+/// are part of the Use& vector, just like normal uses. In the diagram above,
+/// the operand bundle uses start at BOI0_U0. Each instance of BundleOpInfo has
+/// information about a contiguous set of uses constituting an operand bundle,
+/// and the total set of operand bundle uses themselves form a contiguous set of
+/// uses (i.e. there are no gaps between uses corresponding to individual
+/// operand bundles).
+///
+/// This class does not know the location of the set of operand bundle uses
+/// within the use list -- that is decided by the User using this class via the
+/// BeginIdx argument in populateBundleOperandInfos.
+///
+/// Currently operand bundle users with hung-off operands are not supported.
+template <typename InstrTy, typename OpIteratorTy> class OperandBundleUser {
+public:
+ /// \brief Return the number of operand bundles associated with this User.
+ unsigned getNumOperandBundles() const {
+ return std::distance(bundle_op_info_begin(), bundle_op_info_end());
+ }
+
+ /// \brief Return true if this User has any operand bundles.
+ bool hasOperandBundles() const { return getNumOperandBundles() != 0; }
+
+ /// \brief Return the total number operands (not operand bundles) used by
+ /// every operand bundle in this OperandBundleUser.
+ unsigned getNumTotalBundleOperands() const {
+ if (!hasOperandBundles())
+ return 0;
+
+ auto *Begin = bundle_op_info_begin();
+ auto *Back = bundle_op_info_end() - 1;
+
+ assert(Begin <= Back && "hasOperandBundles() returned true!");
+
+ return Back->End - Begin->Begin;
+ }
+
+ /// \brief Return the operand bundle at a specific index.
+ OperandBundleUse getOperandBundle(unsigned Index) const {
+ assert(Index < getNumOperandBundles() && "Index out of bounds!");
+ auto *BOI = bundle_op_info_begin() + Index;
+ auto op_begin = static_cast<const InstrTy *>(this)->op_begin();
+ ArrayRef<Use> Inputs(op_begin + BOI->Begin, op_begin + BOI->End);
+ return OperandBundleUse(BOI->Tag->getKey(), Inputs);
+ }
+
+ /// \brief Return the operand bundle at a specific index.
+ OperandBundleUse getOperandBundle(unsigned Index) {
+ assert(Index < getNumOperandBundles() && "Index out of bounds!");
+ auto *BOI = bundle_op_info_begin() + Index;
+ auto op_begin = static_cast<InstrTy *>(this)->op_begin();
+ ArrayRef<Use> Inputs(op_begin + BOI->Begin, op_begin + BOI->End);
+ return OperandBundleUse(BOI->Tag->getKey(), Inputs);
+ }
+
+protected:
+ /// \brief Used to keep track of an operand bundle. See the main comment on
+ /// OperandBundleUser above.
+ struct BundleOpInfo {
+ /// \brief The operand bundle tag, interned by
+ /// LLVMContextImpl::getOrInsertBundleTag.
+ StringMapEntry<uint32_t> *Tag;
+
+ /// \brief The index in the Use& vector where operands for this operand
+ /// bundle starts.
+ uint32_t Begin;
+
+ /// \brief The index in the Use& vector where operands for this operand
+ /// bundle ends.
+ uint32_t End;
+ };
+
+ typedef BundleOpInfo *bundle_op_iterator;
+ typedef const BundleOpInfo *const_bundle_op_iterator;
+
+ /// \brief Return the start of the list of BundleOpInfo instances associated
+ /// with this OperandBundleUser.
+ bundle_op_iterator bundle_op_info_begin() {
+ if (!static_cast<InstrTy *>(this)->hasDescriptor())
+ return nullptr;
+
+ uint8_t *BytesBegin = static_cast<InstrTy *>(this)->getDescriptor().begin();
+ return reinterpret_cast<bundle_op_iterator>(BytesBegin);
+ }
+
+ /// \brief Return the start of the list of BundleOpInfo instances associated
+ /// with this OperandBundleUser.
+ const_bundle_op_iterator bundle_op_info_begin() const {
+ auto *NonConstThis =
+ const_cast<OperandBundleUser<InstrTy, OpIteratorTy> *>(this);
+ return NonConstThis->bundle_op_info_begin();
+ }
+
+ /// \brief Return the end of the list of BundleOpInfo instances associated
+ /// with this OperandBundleUser.
+ bundle_op_iterator bundle_op_info_end() {
+ if (!static_cast<InstrTy *>(this)->hasDescriptor())
+ return nullptr;
+
+ uint8_t *BytesEnd = static_cast<InstrTy *>(this)->getDescriptor().end();
+ return reinterpret_cast<bundle_op_iterator>(BytesEnd);
+ }
+
+ /// \brief Return the end of the list of BundleOpInfo instances associated
+ /// with this OperandBundleUser.
+ const_bundle_op_iterator bundle_op_info_end() const {
+ auto *NonConstThis =
+ const_cast<OperandBundleUser<InstrTy, OpIteratorTy> *>(this);
+ return NonConstThis->bundle_op_info_end();
+ }
+
+ /// \brief Return the range [\p bundle_op_info_begin, \p bundle_op_info_end).
+ iterator_range<bundle_op_iterator> bundle_op_infos() {
+ return iterator_range<bundle_op_iterator>(bundle_op_info_begin(),
+ bundle_op_info_end());
+ }
+
+ /// \brief Return the range [\p bundle_op_info_begin, \p bundle_op_info_end).
+ iterator_range<const_bundle_op_iterator> bundle_op_infos() const {
+ return iterator_range<const_bundle_op_iterator>(bundle_op_info_begin(),
+ bundle_op_info_end());
+ }
+
+ /// \brief Populate the BundleOpInfo instances and the Use& vector from \p
+ /// Bundles. Return the op_iterator pointing to the Use& one past the last
+ /// last bundle operand use.
+ ///
+ /// Each \p OperandBundleDef instance is tracked by a OperandBundleInfo
+ /// instance allocated in this User's descriptor.
+ OpIteratorTy populateBundleOperandInfos(ArrayRef<OperandBundleDef> Bundles,
+ const unsigned BeginIndex) {
+ auto It = static_cast<InstrTy *>(this)->op_begin() + BeginIndex;
+ for (auto &B : Bundles)
+ It = std::copy(B.Inputs.begin(), B.Inputs.end(), It);
+
+ auto *ContextImpl = static_cast<InstrTy *>(this)->getContext().pImpl;
+ auto BI = Bundles.begin();
+ unsigned CurrentIndex = BeginIndex;
+
+ for (auto &BOI : bundle_op_infos()) {
+ assert(BI != Bundles.end() && "Incorrect allocation?");
+
+ BOI.Tag = ContextImpl->getOrInsertBundleTag(BI->Tag);
+ BOI.Begin = CurrentIndex;
+ BOI.End = CurrentIndex + BI->Inputs.size();
+ CurrentIndex = BOI.End;
+ BI++;
+ }
+
+ assert(BI == Bundles.end() && "Incorrect allocation?");
+
+ return It;
+ }
+
+ /// \brief Return the total number of values used in \p Bundles.
+ static unsigned CountBundleInputs(ArrayRef<OperandBundleDef> Bundles) {
+ unsigned Total = 0;
+ for (auto &B : Bundles)
+ Total += B.Inputs.size();
+ return Total;
+ }
+};
+
+} // end llvm namespace
-#endif
+#endif // LLVM_IR_INSTRTYPES_H
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