This file implements a TargetTransformInfo analysis pass specific to the X86 target machine. More...

#include "X86TargetTransformInfo.h"
#include "llvm/ADT/SmallBitVector.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/CodeGen/Analysis.h"
#include "llvm/CodeGen/BasicTTIImpl.h"
#include "llvm/CodeGen/CostTable.h"
#include "llvm/CodeGen/TargetLowering.h"
#include "llvm/IR/InstIterator.h"
#include "llvm/IR/IntrinsicInst.h"
#include <optional>

Macros
#define	DEBUG_TYPE "x86tti"

Typedefs
using	CostKindTblEntry = CostTblEntryT<CostKindCosts>
using	TypeConversionCostKindTblEntry = TypeConversionCostTblEntryT<CostKindCosts>

Enumerations
enum	ClassIDEnum { GPRClass = 0 , VectorClass = 1 , ScalarFPClass = 2 }

Functions
static InstructionCost	getPredicateFanoutCost (const X86TTIImpl &TTI, Type DataVTy, Type MaskVTy)
static bool	isFoldedIntoRsqrtEstimate (const Value *V, const X86TargetLowering &TLI, MVT VT, TTI::TargetCostKind CostKind)
	Returns true if `V` is the square root, divided into with the reciprocal allowed, and the target replaces the pair with the rsqrt* based estimate, costed with the division.
static bool	isLegalMaskedLoadStore (Type ScalarTy, const X86Subtarget ST)

Detailed Description

This file implements a TargetTransformInfo analysis pass specific to the X86 target machine.

It uses the target's detailed information to provide more precise answers to certain TTI queries, while letting the target independent and default TTI implementations handle the rest.

Definition in file X86TargetTransformInfo.cpp.

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "x86tti"

Definition at line 64 of file X86TargetTransformInfo.cpp.

Typedef Documentation

◆ CostKindTblEntry

using CostKindTblEntry = CostTblEntryT<CostKindCosts>

Definition at line 104 of file X86TargetTransformInfo.cpp.

◆ TypeConversionCostKindTblEntry

using TypeConversionCostKindTblEntry = TypeConversionCostTblEntryT<CostKindCosts>

Definition at line 105 of file X86TargetTransformInfo.cpp.

Enumeration Type Documentation

◆ ClassIDEnum

enum ClassIDEnum

Enumerator
GPRClass
VectorClass
ScalarFPClass

Definition at line 167 of file X86TargetTransformInfo.cpp.

Function Documentation

◆ getPredicateFanoutCost()

InstructionCost getPredicateFanoutCost	(	const X86TTIImpl &	TTI,
		Type *	DataVTy,
		Type *	MaskVTy )

static

Definition at line 3872 of file X86TargetTransformInfo.cpp.

References InstructionCost.

Referenced by llvm::X86TTIImpl::getCmpSelInstrCost(), llvm::X86TTIImpl::getGatherScatterOpCost(), and llvm::X86TTIImpl::getMaskedMemoryOpCost().

◆ isFoldedIntoRsqrtEstimate()

bool isFoldedIntoRsqrtEstimate	(	const Value *	V,
		const X86TargetLowering &	TLI,
		MVT	VT,
		TTI::TargetCostKind	CostKind )

static

Returns true if V is the square root, divided into with the reciprocal allowed, and the target replaces the pair with the rsqrt* based estimate, costed with the division.

The estimate is formed for the legalized type VT.

Definition at line 4195 of file X86TargetTransformInfo.cpp.

References llvm::cast(), CostKind, llvm::TargetLoweringBase::Disabled, llvm::dyn_cast_if_present(), llvm::TargetLoweringBase::getRecipEstimateSqrtEnabled(), llvm::X86TargetLowering::hasSqrtEstimate(), II, llvm::PatternMatch::m_FDiv(), llvm::PatternMatch::m_Specific(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), llvm::TargetTransformInfo::TCK_Latency, and llvm::TargetTransformInfo::TCK_RecipThroughput.