HexagonTargetTransformInfo.cpp | Explore in Territory

//===- HexagonTargetTransformInfo.cpp - Hexagon specific TTI pass ---------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
/// \file
/// This file implements a TargetTransformInfo analysis pass specific to the
/// Hexagon 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.
///
//===----------------------------------------------------------------------===//

#include "HexagonTargetTransformInfo.h"
#include "HexagonSubtarget.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/IR/InstrTypes.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/User.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Transforms/Utils/LoopPeel.h"
#include "llvm/Transforms/Utils/UnrollLoop.h"

usingnamespacellvm;

#define DEBUG_TYPE …

static cl::opt<bool> HexagonAutoHVX("hexagon-autohvx", cl::init(false),
    cl::Hidden, cl::desc("Enable loop vectorizer for HVX"));

static cl::opt<bool> EnableV68FloatAutoHVX(
    "force-hvx-float", cl::Hidden,
    cl::desc("Enable auto-vectorization of floatint point types on v68."));

static cl::opt<bool> EmitLookupTables("hexagon-emit-lookup-tables",
    cl::init(true), cl::Hidden,
    cl::desc("Control lookup table emission on Hexagon target"));

static cl::opt<bool> HexagonMaskedVMem("hexagon-masked-vmem", cl::init(true),
    cl::Hidden, cl::desc("Enable masked loads/stores for HVX"));

// Constant "cost factor" to make floating point operations more expensive
// in terms of vectorization cost. This isn't the best way, but it should
// do. Ultimately, the cost should use cycles.
static const unsigned FloatFactor = …;

bool HexagonTTIImpl::useHVX() const { … }

bool HexagonTTIImpl::isHVXVectorType(Type *Ty) const { … }

unsigned HexagonTTIImpl::getTypeNumElements(Type *Ty) const { … }

TargetTransformInfo::PopcntSupportKind
HexagonTTIImpl::getPopcntSupport(unsigned IntTyWidthInBit) const { … }

// The Hexagon target can unroll loops with run-time trip counts.
void HexagonTTIImpl::getUnrollingPreferences(Loop *L, ScalarEvolution &SE,
                                             TTI::UnrollingPreferences &UP,
                                             OptimizationRemarkEmitter *ORE) { … }

void HexagonTTIImpl::getPeelingPreferences(Loop *L, ScalarEvolution &SE,
                                           TTI::PeelingPreferences &PP) { … }

TTI::AddressingModeKind
HexagonTTIImpl::getPreferredAddressingMode(const Loop *L,
                                           ScalarEvolution *SE) const { … }

/// --- Vector TTI begin ---

unsigned HexagonTTIImpl::getNumberOfRegisters(bool Vector) const { … }

unsigned HexagonTTIImpl::getMaxInterleaveFactor(ElementCount VF) { … }

TypeSize
HexagonTTIImpl::getRegisterBitWidth(TargetTransformInfo::RegisterKind K) const { … }

unsigned HexagonTTIImpl::getMinVectorRegisterBitWidth() const { … }

ElementCount HexagonTTIImpl::getMinimumVF(unsigned ElemWidth,
                                          bool IsScalable) const { … }

InstructionCost HexagonTTIImpl::getCallInstrCost(Function *F, Type *RetTy,
                                                 ArrayRef<Type *> Tys,
                                                 TTI::TargetCostKind CostKind) { … }

InstructionCost
HexagonTTIImpl::getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
                                      TTI::TargetCostKind CostKind) { … }

InstructionCost HexagonTTIImpl::getAddressComputationCost(Type *Tp,
                                                          ScalarEvolution *SE,
                                                          const SCEV *S) { … }

InstructionCost HexagonTTIImpl::getMemoryOpCost(unsigned Opcode, Type *Src,
                                                MaybeAlign Alignment,
                                                unsigned AddressSpace,
                                                TTI::TargetCostKind CostKind,
                                                TTI::OperandValueInfo OpInfo,
                                                const Instruction *I) { … }

InstructionCost
HexagonTTIImpl::getMaskedMemoryOpCost(unsigned Opcode, Type *Src,
                                      Align Alignment, unsigned AddressSpace,
                                      TTI::TargetCostKind CostKind) { … }

InstructionCost HexagonTTIImpl::getShuffleCost(TTI::ShuffleKind Kind, Type *Tp,
                                               ArrayRef<int> Mask,
                                               TTI::TargetCostKind CostKind,
                                               int Index, Type *SubTp,
                                               ArrayRef<const Value *> Args,
                                               const Instruction *CxtI) { … }

InstructionCost HexagonTTIImpl::getGatherScatterOpCost(
    unsigned Opcode, Type *DataTy, const Value *Ptr, bool VariableMask,
    Align Alignment, TTI::TargetCostKind CostKind, const Instruction *I) { … }

InstructionCost HexagonTTIImpl::getInterleavedMemoryOpCost(
    unsigned Opcode, Type *VecTy, unsigned Factor, ArrayRef<unsigned> Indices,
    Align Alignment, unsigned AddressSpace, TTI::TargetCostKind CostKind,
    bool UseMaskForCond, bool UseMaskForGaps) { … }

InstructionCost HexagonTTIImpl::getCmpSelInstrCost(
    unsigned Opcode, Type *ValTy, Type *CondTy, CmpInst::Predicate VecPred,
    TTI::TargetCostKind CostKind, TTI::OperandValueInfo Op1Info,
    TTI::OperandValueInfo Op2Info, const Instruction *I) { … }

InstructionCost HexagonTTIImpl::getArithmeticInstrCost(
    unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind,
    TTI::OperandValueInfo Op1Info, TTI::OperandValueInfo Op2Info,
    ArrayRef<const Value *> Args,
    const Instruction *CxtI) { … }

InstructionCost HexagonTTIImpl::getCastInstrCost(unsigned Opcode, Type *DstTy,
                                                 Type *SrcTy,
                                                 TTI::CastContextHint CCH,
                                                 TTI::TargetCostKind CostKind,
                                                 const Instruction *I) { … }

InstructionCost HexagonTTIImpl::getVectorInstrCost(unsigned Opcode, Type *Val,
                                                   TTI::TargetCostKind CostKind,
                                                   unsigned Index, Value *Op0,
                                                   Value *Op1) { … }

bool HexagonTTIImpl::isLegalMaskedStore(Type *DataType, Align /*Alignment*/) { … }

bool HexagonTTIImpl::isLegalMaskedLoad(Type *DataType, Align /*Alignment*/) { … }

/// --- Vector TTI end ---

unsigned HexagonTTIImpl::getPrefetchDistance() const { … }

unsigned HexagonTTIImpl::getCacheLineSize() const { … }

InstructionCost
HexagonTTIImpl::getInstructionCost(const User *U,
                                   ArrayRef<const Value *> Operands,
                                   TTI::TargetCostKind CostKind) { … }

bool HexagonTTIImpl::shouldBuildLookupTables() const { … }
llvm/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.cpp
