namespace llvm {
-class ScalarTargetTransformInfo;
-class VectorTargetTransformInfo;
-
-/// TargetTransformInfo - This pass provides access to the codegen
-/// interfaces that are needed for IR-level transformations.
-class TargetTransformInfo : public ImmutablePass {
-private:
- const ScalarTargetTransformInfo *STTI;
- const VectorTargetTransformInfo *VTTI;
-public:
- /// Default ctor.
- ///
- /// @note This has to exist, because this is a pass, but it should never be
- /// used.
- TargetTransformInfo();
-
- TargetTransformInfo(const ScalarTargetTransformInfo* S,
- const VectorTargetTransformInfo *V)
- : ImmutablePass(ID), STTI(S), VTTI(V) {
- initializeTargetTransformInfoPass(*PassRegistry::getPassRegistry());
- }
-
- TargetTransformInfo(const TargetTransformInfo &T) :
- ImmutablePass(ID), STTI(T.STTI), VTTI(T.VTTI) { }
-
- const ScalarTargetTransformInfo* getScalarTargetTransformInfo() const {
- return STTI;
- }
- const VectorTargetTransformInfo* getVectorTargetTransformInfo() const {
- return VTTI;
- }
-
- /// Pass identification, replacement for typeid.
- static char ID;
-};
-
// ---------------------------------------------------------------------------//
// The classes below are inherited and implemented by target-specific classes
// in the codegen.
}
};
+
+/// TargetTransformInfo - This pass provides access to the codegen
+/// interfaces that are needed for IR-level transformations.
+class TargetTransformInfo : public ImmutablePass {
+private:
+ const ScalarTargetTransformInfo *STTI;
+ const VectorTargetTransformInfo *VTTI;
+public:
+ /// Default ctor.
+ ///
+ /// @note This has to exist, because this is a pass, but it should never be
+ /// used.
+ TargetTransformInfo();
+
+ TargetTransformInfo(const ScalarTargetTransformInfo* S,
+ const VectorTargetTransformInfo *V)
+ : ImmutablePass(ID), STTI(S), VTTI(V) {
+ initializeTargetTransformInfoPass(*PassRegistry::getPassRegistry());
+ }
+
+ TargetTransformInfo(const TargetTransformInfo &T) :
+ ImmutablePass(ID), STTI(T.STTI), VTTI(T.VTTI) { }
+
+ /// \name Scalar Target Information
+ /// @{
+
+ /// PopcntHwSupport - Hardware support for population count. Compared to the
+ /// SW implementation, HW support is supposed to significantly boost the
+ /// performance when the population is dense, and it may or may not degrade
+ /// performance if the population is sparse. A HW support is considered as
+ /// "Fast" if it can outperform, or is on a par with, SW implementaion when
+ /// the population is sparse; otherwise, it is considered as "Slow".
+ enum PopcntHwSupport {
+ None,
+ Fast,
+ Slow
+ };
+
+ /// isLegalAddImmediate - Return true if the specified immediate is legal
+ /// add immediate, that is the target has add instructions which can add
+ /// a register with the immediate without having to materialize the
+ /// immediate into a register.
+ bool isLegalAddImmediate(int64_t Imm) const {
+ return STTI->isLegalAddImmediate(Imm);
+ }
+
+ /// isLegalICmpImmediate - Return true if the specified immediate is legal
+ /// icmp immediate, that is the target has icmp instructions which can compare
+ /// a register against the immediate without having to materialize the
+ /// immediate into a register.
+ bool isLegalICmpImmediate(int64_t Imm) const {
+ return STTI->isLegalICmpImmediate(Imm);
+ }
+
+ /// isLegalAddressingMode - Return true if the addressing mode represented by
+ /// AM is legal for this target, for a load/store of the specified type.
+ /// The type may be VoidTy, in which case only return true if the addressing
+ /// mode is legal for a load/store of any legal type.
+ /// TODO: Handle pre/postinc as well.
+ bool isLegalAddressingMode(Type *Ty, GlobalValue *BaseGV,
+ int64_t BaseOffset, bool HasBaseReg,
+ int64_t Scale) const {
+ return STTI->isLegalAddressingMode(Ty, BaseGV, BaseOffset, HasBaseReg,
+ Scale);
+ }
+
+ /// isTruncateFree - Return true if it's free to truncate a value of
+ /// type Ty1 to type Ty2. e.g. On x86 it's free to truncate a i32 value in
+ /// register EAX to i16 by referencing its sub-register AX.
+ bool isTruncateFree(Type *Ty1, Type *Ty2) const {
+ return STTI->isTruncateFree(Ty1, Ty2);
+ }
+
+ /// Is this type legal.
+ bool isTypeLegal(Type *Ty) const {
+ return STTI->isTypeLegal(Ty);
+ }
+
+ /// getJumpBufAlignment - returns the target's jmp_buf alignment in bytes
+ unsigned getJumpBufAlignment() const {
+ return STTI->getJumpBufAlignment();
+ }
+
+ /// getJumpBufSize - returns the target's jmp_buf size in bytes.
+ unsigned getJumpBufSize() const {
+ return STTI->getJumpBufSize();
+ }
+
+ /// shouldBuildLookupTables - Return true if switches should be turned into
+ /// lookup tables for the target.
+ bool shouldBuildLookupTables() const {
+ return STTI->shouldBuildLookupTables();
+ }
+
+ /// getPopcntHwSupport - Return hardware support for population count.
+ PopcntHwSupport getPopcntHwSupport(unsigned IntTyWidthInBit) const {
+ return (PopcntHwSupport)STTI->getPopcntHwSupport(IntTyWidthInBit);
+ }
+
+ /// getIntImmCost - Return the expected cost of materializing the given
+ /// integer immediate of the specified type.
+ unsigned getIntImmCost(const APInt &Imm, Type *Ty) const {
+ return STTI->getIntImmCost(Imm, Ty);
+ }
+
+ /// @}
+
+ /// \name Vector Target Information
+ /// @{
+
+ enum ShuffleKind {
+ Broadcast, // Broadcast element 0 to all other elements.
+ Reverse, // Reverse the order of the vector.
+ InsertSubvector, // InsertSubvector. Index indicates start offset.
+ ExtractSubvector // ExtractSubvector Index indicates start offset.
+ };
+
+ /// \return The number of scalar or vector registers that the target has.
+ /// If 'Vectors' is true, it returns the number of vector registers. If it is
+ /// set to false, it returns the number of scalar registers.
+ unsigned getNumberOfRegisters(bool Vector) const {
+ return VTTI->getNumberOfRegisters(Vector);
+ }
+
+ /// \return The expected cost of arithmetic ops, such as mul, xor, fsub, etc.
+ unsigned getArithmeticInstrCost(unsigned Opcode, Type *Ty) const {
+ return VTTI->getArithmeticInstrCost(Opcode, Ty);
+ }
+
+ /// \return The cost of a shuffle instruction of kind Kind and of type Tp.
+ /// The index and subtype parameters are used by the subvector insertion and
+ /// extraction shuffle kinds.
+ unsigned getShuffleCost(ShuffleKind Kind, Type *Tp,
+ int Index = 0, Type *SubTp = 0) const {
+ return VTTI->getShuffleCost((VectorTargetTransformInfo::ShuffleKind)Kind,
+ Tp, Index, SubTp);
+ }
+
+ /// \return The expected cost of cast instructions, such as bitcast, trunc,
+ /// zext, etc.
+ unsigned getCastInstrCost(unsigned Opcode, Type *Dst,
+ Type *Src) const {
+ return VTTI->getCastInstrCost(Opcode, Dst, Src);
+ }
+
+ /// \return The expected cost of control-flow related instrutctions such as
+ /// Phi, Ret, Br.
+ unsigned getCFInstrCost(unsigned Opcode) const {
+ return VTTI->getCFInstrCost(Opcode);
+ }
+
+ /// \returns The expected cost of compare and select instructions.
+ unsigned getCmpSelInstrCost(unsigned Opcode, Type *ValTy,
+ Type *CondTy = 0) const {
+ return VTTI->getCmpSelInstrCost(Opcode, ValTy, CondTy);
+ }
+
+ /// \return The expected cost of vector Insert and Extract.
+ /// Use -1 to indicate that there is no information on the index value.
+ unsigned getVectorInstrCost(unsigned Opcode, Type *Val,
+ unsigned Index = -1) const {
+ return VTTI->getVectorInstrCost(Opcode, Val, Index);
+ }
+
+ /// \return The cost of Load and Store instructions.
+ unsigned getMemoryOpCost(unsigned Opcode, Type *Src,
+ unsigned Alignment,
+ unsigned AddressSpace) const {
+ return VTTI->getMemoryOpCost(Opcode, Src, Alignment, AddressSpace);;
+ }
+
+ /// \returns The cost of Intrinsic instructions.
+ unsigned getIntrinsicInstrCost(Intrinsic::ID ID,
+ Type *RetTy,
+ ArrayRef<Type*> Tys) const {
+ return VTTI->getIntrinsicInstrCost(ID, RetTy, Tys);
+ }
+
+ /// \returns The number of pieces into which the provided type must be
+ /// split during legalization. Zero is returned when the answer is unknown.
+ unsigned getNumberOfParts(Type *Tp) const {
+ return VTTI->getNumberOfParts(Tp);
+ }
+
+ /// @}
+
+ /// \name Legacy sub-object getters
+ /// @{
+
+ const ScalarTargetTransformInfo* getScalarTargetTransformInfo() const {
+ return STTI;
+ }
+ const VectorTargetTransformInfo* getVectorTargetTransformInfo() const {
+ return VTTI;
+ }
+
+ /// @}
+
+ /// Pass identification, replacement for typeid.
+ static char ID;
+};
+
} // End llvm namespace
#endif
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