PPCTargetTransformInfo.cpp | Explore in Territory

//===-- PPCTargetTransformInfo.cpp - PPC specific TTI ---------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

#include "PPCTargetTransformInfo.h"
#include "llvm/Analysis/CodeMetrics.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/CodeGen/BasicTTIImpl.h"
#include "llvm/CodeGen/CostTable.h"
#include "llvm/CodeGen/TargetLowering.h"
#include "llvm/CodeGen/TargetSchedule.h"
#include "llvm/IR/IntrinsicsPowerPC.h"
#include "llvm/IR/ProfDataUtils.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Transforms/InstCombine/InstCombiner.h"
#include "llvm/Transforms/Utils/Local.h"
#include <optional>

usingnamespacellvm;

#define DEBUG_TYPE …

static cl::opt<bool> VecMaskCost("ppc-vec-mask-cost",
cl::desc("add masking cost for i1 vectors"), cl::init(true), cl::Hidden);

static cl::opt<bool> DisablePPCConstHoist("disable-ppc-constant-hoisting",
cl::desc("disable constant hoisting on PPC"), cl::init(false), cl::Hidden);

static cl::opt<bool>
EnablePPCColdCC("ppc-enable-coldcc", cl::Hidden, cl::init(false),
                cl::desc("Enable using coldcc calling conv for cold "
                         "internal functions"));

static cl::opt<bool>
LsrNoInsnsCost("ppc-lsr-no-insns-cost", cl::Hidden, cl::init(false),
               cl::desc("Do not add instruction count to lsr cost model"));

// The latency of mtctr is only justified if there are more than 4
// comparisons that will be removed as a result.
static cl::opt<unsigned>
SmallCTRLoopThreshold("min-ctr-loop-threshold", cl::init(4), cl::Hidden,
                      cl::desc("Loops with a constant trip count smaller than "
                               "this value will not use the count register."));

//===----------------------------------------------------------------------===//
//
// PPC cost model.
//
//===----------------------------------------------------------------------===//

TargetTransformInfo::PopcntSupportKind
PPCTTIImpl::getPopcntSupport(unsigned TyWidth) { … }

std::optional<Instruction *>
PPCTTIImpl::instCombineIntrinsic(InstCombiner &IC, IntrinsicInst &II) const { … }

InstructionCost PPCTTIImpl::getIntImmCost(const APInt &Imm, Type *Ty,
                                          TTI::TargetCostKind CostKind) { … }

InstructionCost PPCTTIImpl::getIntImmCostIntrin(Intrinsic::ID IID, unsigned Idx,
                                                const APInt &Imm, Type *Ty,
                                                TTI::TargetCostKind CostKind) { … }

InstructionCost PPCTTIImpl::getIntImmCostInst(unsigned Opcode, unsigned Idx,
                                              const APInt &Imm, Type *Ty,
                                              TTI::TargetCostKind CostKind,
                                              Instruction *Inst) { … }

// Check if the current Type is an MMA vector type. Valid MMA types are
// v256i1 and v512i1 respectively.
static bool isMMAType(Type *Ty) { … }

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

bool PPCTTIImpl::isHardwareLoopProfitable(Loop *L, ScalarEvolution &SE,
                                          AssumptionCache &AC,
                                          TargetLibraryInfo *LibInfo,
                                          HardwareLoopInfo &HWLoopInfo) { … }

void PPCTTIImpl::getUnrollingPreferences(Loop *L, ScalarEvolution &SE,
                                         TTI::UnrollingPreferences &UP,
                                         OptimizationRemarkEmitter *ORE) { … }

void PPCTTIImpl::getPeelingPreferences(Loop *L, ScalarEvolution &SE,
                                       TTI::PeelingPreferences &PP) { … }
// This function returns true to allow using coldcc calling convention.
// Returning true results in coldcc being used for functions which are cold at
// all call sites when the callers of the functions are not calling any other
// non coldcc functions.
bool PPCTTIImpl::useColdCCForColdCall(Function &F) { … }

bool PPCTTIImpl::enableAggressiveInterleaving(bool LoopHasReductions) { … }

PPCTTIImpl::TTI::MemCmpExpansionOptions
PPCTTIImpl::enableMemCmpExpansion(bool OptSize, bool IsZeroCmp) const { … }

bool PPCTTIImpl::enableInterleavedAccessVectorization() { … }

unsigned PPCTTIImpl::getNumberOfRegisters(unsigned ClassID) const { … }

unsigned PPCTTIImpl::getRegisterClassForType(bool Vector, Type *Ty) const { … }

const char* PPCTTIImpl::getRegisterClassName(unsigned ClassID) const { … }

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

unsigned PPCTTIImpl::getCacheLineSize() const { … }

unsigned PPCTTIImpl::getPrefetchDistance() const { … }

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

// Returns a cost adjustment factor to adjust the cost of vector instructions
// on targets which there is overlap between the vector and scalar units,
// thereby reducing the overall throughput of vector code wrt. scalar code.
// An invalid instruction cost is returned if the type is an MMA vector type.
InstructionCost PPCTTIImpl::vectorCostAdjustmentFactor(unsigned Opcode,
                                                       Type *Ty1, Type *Ty2) { … }

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

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

InstructionCost PPCTTIImpl::getCFInstrCost(unsigned Opcode,
                                           TTI::TargetCostKind CostKind,
                                           const Instruction *I) { … }

InstructionCost PPCTTIImpl::getCastInstrCost(unsigned Opcode, Type *Dst,
                                             Type *Src,
                                             TTI::CastContextHint CCH,
                                             TTI::TargetCostKind CostKind,
                                             const Instruction *I) { … }

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

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

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

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

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

bool PPCTTIImpl::areTypesABICompatible(const Function *Caller,
                                       const Function *Callee,
                                       const ArrayRef<Type *> &Types) const { … }

bool PPCTTIImpl::canSaveCmp(Loop *L, BranchInst **BI, ScalarEvolution *SE,
                            LoopInfo *LI, DominatorTree *DT,
                            AssumptionCache *AC, TargetLibraryInfo *LibInfo) { … }

bool PPCTTIImpl::isLSRCostLess(const TargetTransformInfo::LSRCost &C1,
                               const TargetTransformInfo::LSRCost &C2) { … }

bool PPCTTIImpl::isNumRegsMajorCostOfLSR() { … }

bool PPCTTIImpl::shouldBuildRelLookupTables() const { … }

bool PPCTTIImpl::getTgtMemIntrinsic(IntrinsicInst *Inst,
                                    MemIntrinsicInfo &Info) { … }

bool PPCTTIImpl::hasActiveVectorLength(unsigned Opcode, Type *DataType,
                                       Align Alignment) const { … }

InstructionCost PPCTTIImpl::getVPMemoryOpCost(unsigned Opcode, Type *Src,
                                              Align Alignment,
                                              unsigned AddressSpace,
                                              TTI::TargetCostKind CostKind,
                                              const Instruction *I) { … }

bool PPCTTIImpl::supportsTailCallFor(const CallBase *CB) const { … }
llvm/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp
