llvm::TCEStubTTIImpl Class Reference

#include <TCEStubTargetTransformInfo.hh>

Inheritance diagram for llvm::TCEStubTTIImpl:

Collaboration diagram for llvm::TCEStubTTIImpl:

Public Member Functions
	TCEStubTTIImpl (const TCEStubTargetMachine *TM, const Function &F)
unsigned	getNumberOfRegisters (bool vector)
unsigned	getRegisterBitWidth (bool vector) const
unsigned	getMaxInterleaveFactor (unsigned VF)
unsigned	getCastInstrCost (unsigned Opcode, Type *Dst, Type *Src, const Instruction *=nullptr)

Private Types
typedef BasicTTIImplBase< TCEStubTTIImpl >	BaseT
typedef TargetTransformInfo	TTI

Private Member Functions
const TCEStubSubTarget *	getST () const
const TargetLowering *	getTLI () const

Private Attributes
friend	BaseT
const TCEStubTargetMachine *	TM
const TCEStubSubTarget *	ST
const TargetLowering *	TLI

Detailed Description

Definition at line 43 of file TCEStubTargetTransformInfo.hh.

Member Typedef Documentation

BaseT

typedef BasicTTIImplBase<TCEStubTTIImpl> llvm::TCEStubTTIImpl::BaseT

private

Definition at line 44 of file TCEStubTargetTransformInfo.hh.

TTI

typedef TargetTransformInfo llvm::TCEStubTTIImpl::TTI

private

Definition at line 45 of file TCEStubTargetTransformInfo.hh.

Constructor & Destructor Documentation

TCEStubTTIImpl()

llvm::TCEStubTTIImpl::TCEStubTTIImpl ( const TCEStubTargetMachine *  TM, const Function &  F  )

inlineexplicit

Definition at line 57 of file TCEStubTargetTransformInfo.hh.

            : BaseT(TM, F.getParent()->getDataLayout()),
              TM(TM), ST(TM->getSubtargetImpl()) {}

Member Function Documentation

getCastInstrCost()

unsigned TCEStubTTIImpl::getCastInstrCost	(	unsigned	Opcode,
		Type *	Dst,
		Type *	Src,
		const Instruction *	= nullptr
	)

Definition at line 92 of file TCEStubTargetTransformInfo.cc.

  {
    // TODO: Maybe use ADF/osal information to figure out real cost
    // 1 selected at the moment because LLVM cost model assumed way too high
    // cost for trunc/zext instructions. Too low value here might lead to 
    // vectorization of loop that would be better left in scalar form
    return 1;
}

getMaxInterleaveFactor()

unsigned TCEStubTTIImpl::getMaxInterleaveFactor

(

unsigned

VF

)

Definition at line 84 of file TCEStubTargetTransformInfo.cc.

                                                  {
    // This means maximum loop unroll factor
    // 2 because loopvectorizer requires >1
    // TODO: find some way adjust this.
    return 2;
}

getNumberOfRegisters()

unsigned TCEStubTTIImpl::getNumberOfRegisters

(

bool

vector

)

Definition at line 59 of file TCEStubTargetTransformInfo.cc.

                                                {
    // without adf information we have no clue about registers
    if (TM->ttaMach_ == NULL)
        return 0;
 
    // Widest operand tells directly the widest register
    unsigned widestOperand =
        MachineInfo::findWidestOperand(*(TM->ttaMach_), vector);
 
    return MachineInfo::numberOfRegisters(*(TM->ttaMach_), widestOperand);
}

References MachineInfo::findWidestOperand(), MachineInfo::numberOfRegisters(), TM, and llvm::TCEBaseTargetMachine::ttaMach_.

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getRegisterBitWidth()

unsigned TCEStubTTIImpl::getRegisterBitWidth

(

bool

vector

)

const

Definition at line 72 of file TCEStubTargetTransformInfo.cc.

{
    // without adf information we have no clue about registers
    if (TM->ttaMach_ == NULL)
        return 0;
 
    // Widest operand tells directly the widest register
    return MachineInfo::findWidestOperand(*(TM->ttaMach_), vector);
}

References MachineInfo::findWidestOperand(), TM, and llvm::TCEBaseTargetMachine::ttaMach_.

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getST()

const TCEStubSubTarget * llvm::TCEStubTTIImpl::getST ( ) const

inlineprivate

Definition at line 51 of file TCEStubTargetTransformInfo.hh.

{ return ST; }

References ST.

getTLI()

const TargetLowering * llvm::TCEStubTTIImpl::getTLI ( ) const

inlineprivate

Definition at line 52 of file TCEStubTargetTransformInfo.hh.

                                             {
            return ST->getTargetLowering();
        }

References llvm::TCEStubSubTarget::getTargetLowering(), and ST.

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Member Data Documentation

BaseT

friend llvm::TCEStubTTIImpl::BaseT

private

Definition at line 46 of file TCEStubTargetTransformInfo.hh.

ST

const TCEStubSubTarget* llvm::TCEStubTTIImpl::ST

private

Definition at line 49 of file TCEStubTargetTransformInfo.hh.

Referenced by getST(), and getTLI().

TLI

const TargetLowering* llvm::TCEStubTTIImpl::TLI

private

Definition at line 50 of file TCEStubTargetTransformInfo.hh.

TM

const TCEStubTargetMachine* llvm::TCEStubTTIImpl::TM

private

Definition at line 48 of file TCEStubTargetTransformInfo.hh.

Referenced by getNumberOfRegisters(), and getRegisterBitWidth().

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The documentation for this class was generated from the following files:

• TCEStubTargetTransformInfo.hh
• TCEStubTargetTransformInfo.cc