#ifndef LLVM_ANALYSIS_TARGETTRANSFORMINFO_H
#define LLVM_ANALYSIS_TARGETTRANSFORMINFO_H
-#include "llvm/CodeGen/ValueTypes.h"
-#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/Intrinsics.h"
-#include "llvm/IR/Type.h"
#include "llvm/Pass.h"
#include "llvm/Support/DataTypes.h"
namespace llvm {
+class GlobalValue;
+class Type;
+class User;
+class Value;
+
/// TargetTransformInfo - This pass provides access to the codegen
/// interfaces that are needed for IR-level transformations.
class TargetTransformInfo {
/// fundamental values that should be used to interpret (and produce) those
/// costs. The costs are returned as an unsigned rather than a member of this
/// enumeration because it is expected that the cost of one IR instruction
- /// may have a multiplicative factor to it or otherwise won't fit dircetly
+ /// may have a multiplicative factor to it or otherwise won't fit directly
/// into the enum. Moreover, it is common to sum or average costs which works
/// better as simple integral values. Thus this enum only provides constants.
///
/// 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
+ /// with, SW implementation when the population is sparse; otherwise, it is
/// considered as "Slow".
enum PopcntSupportKind {
PSK_Software,
int64_t BaseOffset, bool HasBaseReg,
int64_t Scale) const;
+ /// \brief Return the cost of the scaling factor used in the addressing
+ /// mode represented by AM for this target, for a load/store
+ /// of the specified type.
+ /// If the AM is supported, the return value must be >= 0.
+ /// If the AM is not supported, it returns a negative value.
+ /// TODO: Handle pre/postinc as well.
+ virtual int getScalingFactorCost(Type *Ty, GlobalValue *BaseGV,
+ int64_t BaseOffset, bool HasBaseReg,
+ int64_t Scale) const;
+
/// 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.
SK_ExtractSubvector ///< ExtractSubvector Index indicates start offset.
};
+ /// \brief Additonal information about an operand's possible values.
+ enum OperandValueKind {
+ OK_AnyValue, // Operand can have any value.
+ OK_UniformValue, // Operand is uniform (splat of a value).
+ OK_UniformConstantValue // Operand is uniform constant.
+ };
+
/// \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.
virtual unsigned getMaximumUnrollFactor() const;
/// \return The expected cost of arithmetic ops, such as mul, xor, fsub, etc.
- virtual unsigned getArithmeticInstrCost(unsigned Opcode, Type *Ty) const;
+ virtual unsigned getArithmeticInstrCost(unsigned Opcode, Type *Ty,
+ OperandValueKind Opd1Info = OK_AnyValue,
+ OperandValueKind Opd2Info = OK_AnyValue) const;
/// \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
virtual unsigned getCastInstrCost(unsigned Opcode, Type *Dst,
Type *Src) const;
- /// \return The expected cost of control-flow related instrutctions such as
+ /// \return The expected cost of control-flow related instructions such as
/// Phi, Ret, Br.
virtual unsigned getCFInstrCost(unsigned Opcode) const;
/// split during legalization. Zero is returned when the answer is unknown.
virtual unsigned getNumberOfParts(Type *Tp) const;
+ /// \returns The cost of the address computation. For most targets this can be
+ /// merged into the instruction indexing mode. Some targets might want to
+ /// distinguish between address computation for memory operations on vector
+ /// types and scalar types. Such targets should override this function.
+ virtual unsigned getAddressComputationCost(Type *Ty) const;
+
/// @}
/// Analysis group identification.
/// \brief Create the base case instance of a pass in the TTI analysis group.
///
-/// This class provides the base case for the stack of TTI analyses. It doesn't
+/// This class provides the base case for the stack of TTI analyzes. It doesn't
/// delegate to anything and uses the STTI and VTTI objects passed in to
/// satisfy the queries.
ImmutablePass *createNoTargetTransformInfoPass();