#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/PostOrderIterator.h"
#include "llvm/ADT/SetVector.h"
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/AliasAnalysis.h"
+#include "llvm/Analysis/AssumptionCache.h"
+#include "llvm/Analysis/CodeMetrics.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/ScalarEvolution.h"
#include "llvm/Analysis/ScalarEvolutionExpressions.h"
#include "llvm/Transforms/Utils/VectorUtils.h"
#include <algorithm>
#include <map>
+#include <memory>
using namespace llvm;
#define SV_NAME "slp-vectorizer"
#define DEBUG_TYPE "SLP"
+STATISTIC(NumVectorInstructions, "Number of vector instructions generated");
+
static cl::opt<int>
SLPCostThreshold("slp-threshold", cl::init(0), cl::Hidden,
cl::desc("Only vectorize if you gain more than this "
static const unsigned RecursionMaxDepth = 12;
-/// A helper class for numbering instructions in multiple blocks.
-/// Numbers start at zero for each basic block.
-struct BlockNumbering {
-
- BlockNumbering(BasicBlock *Bb) : BB(Bb), Valid(false) {}
-
- void numberInstructions() {
- unsigned Loc = 0;
- InstrIdx.clear();
- InstrVec.clear();
- // Number the instructions in the block.
- for (BasicBlock::iterator it = BB->begin(), e = BB->end(); it != e; ++it) {
- InstrIdx[it] = Loc++;
- InstrVec.push_back(it);
- assert(InstrVec[InstrIdx[it]] == it && "Invalid allocation");
- }
- Valid = true;
- }
-
- int getIndex(Instruction *I) {
- assert(I->getParent() == BB && "Invalid instruction");
- if (!Valid)
- numberInstructions();
- assert(InstrIdx.count(I) && "Unknown instruction");
- return InstrIdx[I];
- }
-
- Instruction *getInstruction(unsigned loc) {
- if (!Valid)
- numberInstructions();
- assert(InstrVec.size() > loc && "Invalid Index");
- return InstrVec[loc];
- }
-
- void forget() { Valid = false; }
-
-private:
- /// The block we are numbering.
- BasicBlock *BB;
- /// Is the block numbered.
- bool Valid;
- /// Maps instructions to numbers and back.
- SmallDenseMap<Instruction *, int> InstrIdx;
- /// Maps integers to Instructions.
- SmallVector<Instruction *, 32> InstrVec;
-};
-
/// \returns the parent basic block if all of the instructions in \p VL
/// are in the same block or null otherwise.
static BasicBlock *getSameBlock(ArrayRef<Value *> VL) {
return Opcode;
}
+/// Get the intersection (logical and) of all of the potential IR flags
+/// of each scalar operation (VL) that will be converted into a vector (I).
+/// Flag set: NSW, NUW, exact, and all of fast-math.
+static void propagateIRFlags(Value *I, ArrayRef<Value *> VL) {
+ if (auto *VecOp = dyn_cast<BinaryOperator>(I)) {
+ if (auto *Intersection = dyn_cast<BinaryOperator>(VL[0])) {
+ // Intersection is initialized to the 0th scalar,
+ // so start counting from index '1'.
+ for (int i = 1, e = VL.size(); i < e; ++i) {
+ if (auto *Scalar = dyn_cast<BinaryOperator>(VL[i]))
+ Intersection->andIRFlags(Scalar);
+ }
+ VecOp->copyIRFlags(Intersection);
+ }
+ }
+}
+
/// \returns \p I after propagating metadata from \p VL.
static Instruction *propagateMetadata(Instruction *I, ArrayRef<Value *> VL) {
Instruction *I0 = cast<Instruction>(VL[0]);
case LLVMContext::MD_tbaa:
MD = MDNode::getMostGenericTBAA(MD, IMD);
break;
+ case LLVMContext::MD_alias_scope:
+ case LLVMContext::MD_noalias:
+ MD = MDNode::intersect(MD, IMD);
+ break;
case LLVMContext::MD_fpmath:
MD = MDNode::getMostGenericFPMath(MD, IMD);
break;
}
}
+/// \returns True if in-tree use also needs extract. This refers to
+/// possible scalar operand in vectorized instruction.
+static bool InTreeUserNeedToExtract(Value *Scalar, Instruction *UserInst,
+ TargetLibraryInfo *TLI) {
+
+ unsigned Opcode = UserInst->getOpcode();
+ switch (Opcode) {
+ case Instruction::Load: {
+ LoadInst *LI = cast<LoadInst>(UserInst);
+ return (LI->getPointerOperand() == Scalar);
+ }
+ case Instruction::Store: {
+ StoreInst *SI = cast<StoreInst>(UserInst);
+ return (SI->getPointerOperand() == Scalar);
+ }
+ case Instruction::Call: {
+ CallInst *CI = cast<CallInst>(UserInst);
+ Intrinsic::ID ID = getIntrinsicIDForCall(CI, TLI);
+ if (hasVectorInstrinsicScalarOpd(ID, 1)) {
+ return (CI->getArgOperand(1) == Scalar);
+ }
+ }
+ default:
+ return false;
+ }
+}
+
+/// \returns the AA location that is being access by the instruction.
+static AliasAnalysis::Location getLocation(Instruction *I, AliasAnalysis *AA) {
+ if (StoreInst *SI = dyn_cast<StoreInst>(I))
+ return AA->getLocation(SI);
+ if (LoadInst *LI = dyn_cast<LoadInst>(I))
+ return AA->getLocation(LI);
+ return AliasAnalysis::Location();
+}
+
/// Bottom Up SLP Vectorizer.
class BoUpSLP {
public:
BoUpSLP(Function *Func, ScalarEvolution *Se, const DataLayout *Dl,
TargetTransformInfo *Tti, TargetLibraryInfo *TLi, AliasAnalysis *Aa,
- LoopInfo *Li, DominatorTree *Dt)
- : F(Func), SE(Se), DL(Dl), TTI(Tti), TLI(TLi), AA(Aa), LI(Li), DT(Dt),
- Builder(Se->getContext()) {}
+ LoopInfo *Li, DominatorTree *Dt, AssumptionCache *AC)
+ : NumLoadsWantToKeepOrder(0), NumLoadsWantToChangeOrder(0), F(Func),
+ SE(Se), DL(Dl), TTI(Tti), TLI(TLi), AA(Aa), LI(Li), DT(Dt),
+ Builder(Se->getContext()) {
+ CodeMetrics::collectEphemeralValues(F, AC, EphValues);
+ }
/// \brief Vectorize the tree that starts with the elements in \p VL.
/// Returns the vectorized root.
Value *vectorizeTree();
+ /// \returns the cost incurred by unwanted spills and fills, caused by
+ /// holding live values over call sites.
+ int getSpillCost();
+
/// \returns the vectorization cost of the subtree that starts at \p VL.
/// A negative number means that this is profitable.
int getTreeCost();
ScalarToTreeEntry.clear();
MustGather.clear();
ExternalUses.clear();
- MemBarrierIgnoreList.clear();
+ NumLoadsWantToKeepOrder = 0;
+ NumLoadsWantToChangeOrder = 0;
+ for (auto &Iter : BlocksSchedules) {
+ BlockScheduling *BS = Iter.second.get();
+ BS->clear();
+ }
}
/// \returns true if the memory operations A and B are consecutive.
/// \brief Perform LICM and CSE on the newly generated gather sequences.
void optimizeGatherSequence();
+ /// \returns true if it is benefitial to reverse the vector order.
+ bool shouldReorder() const {
+ return NumLoadsWantToChangeOrder > NumLoadsWantToKeepOrder;
+ }
+
private:
struct TreeEntry;
/// roots. This method calculates the cost of extracting the values.
int getGatherCost(ArrayRef<Value *> VL);
- /// \returns the AA location that is being access by the instruction.
- AliasAnalysis::Location getLocation(Instruction *I);
-
- /// \brief Checks if it is possible to sink an instruction from
- /// \p Src to \p Dst.
- /// \returns the pointer to the barrier instruction if we can't sink.
- Value *getSinkBarrier(Instruction *Src, Instruction *Dst);
-
- /// \returns the index of the last instruction in the BB from \p VL.
- int getLastIndex(ArrayRef<Value *> VL);
-
- /// \returns the Instruction in the bundle \p VL.
- Instruction *getLastInstruction(ArrayRef<Value *> VL);
-
/// \brief Set the Builder insert point to one after the last instruction in
/// the bundle
void setInsertPointAfterBundle(ArrayRef<Value *> VL);
bool isFullyVectorizableTinyTree();
struct TreeEntry {
- TreeEntry() : Scalars(), VectorizedValue(nullptr), LastScalarIndex(0),
+ TreeEntry() : Scalars(), VectorizedValue(nullptr),
NeedToGather(0) {}
/// \returns true if the scalars in VL are equal to this entry.
/// The Scalars are vectorized into this value. It is initialized to Null.
Value *VectorizedValue;
- /// The index in the basic block of the last scalar.
- int LastScalarIndex;
-
/// Do we need to gather this sequence ?
bool NeedToGather;
};
Last->Scalars.insert(Last->Scalars.begin(), VL.begin(), VL.end());
Last->NeedToGather = !Vectorized;
if (Vectorized) {
- Last->LastScalarIndex = getLastIndex(VL);
for (int i = 0, e = VL.size(); i != e; ++i) {
assert(!ScalarToTreeEntry.count(VL[i]) && "Scalar already in tree!");
ScalarToTreeEntry[VL[i]] = idx;
}
} else {
- Last->LastScalarIndex = 0;
MustGather.insert(VL.begin(), VL.end());
}
return Last;
}
-
+
/// -- Vectorization State --
/// Holds all of the tree entries.
std::vector<TreeEntry> VectorizableTree;
};
typedef SmallVector<ExternalUser, 16> UserList;
+ /// Checks if two instructions may access the same memory.
+ ///
+ /// \p Loc1 is the location of \p Inst1. It is passed explicitly because it
+ /// is invariant in the calling loop.
+ bool isAliased(const AliasAnalysis::Location &Loc1, Instruction *Inst1,
+ Instruction *Inst2) {
+
+ // First check if the result is already in the cache.
+ AliasCacheKey key = std::make_pair(Inst1, Inst2);
+ Optional<bool> &result = AliasCache[key];
+ if (result.hasValue()) {
+ return result.getValue();
+ }
+ AliasAnalysis::Location Loc2 = getLocation(Inst2, AA);
+ bool aliased = true;
+ if (Loc1.Ptr && Loc2.Ptr) {
+ // Do the alias check.
+ aliased = AA->alias(Loc1, Loc2);
+ }
+ // Store the result in the cache.
+ result = aliased;
+ return aliased;
+ }
+
+ typedef std::pair<Instruction *, Instruction *> AliasCacheKey;
+
+ /// Cache for alias results.
+ DenseMap<AliasCacheKey, Optional<bool>> AliasCache;
+
/// A list of values that need to extracted out of the tree.
/// This list holds pairs of (Internal Scalar : External User).
UserList ExternalUses;
- /// A list of instructions to ignore while sinking
- /// memory instructions. This map must be reset between runs of getCost.
- ValueSet MemBarrierIgnoreList;
+ /// Values used only by @llvm.assume calls.
+ SmallPtrSet<const Value *, 32> EphValues;
/// Holds all of the instructions that we gathered.
SetVector<Instruction *> GatherSeq;
/// A list of blocks that we are going to CSE.
SetVector<BasicBlock *> CSEBlocks;
- /// Numbers instructions in different blocks.
- DenseMap<BasicBlock *, BlockNumbering> BlocksNumbers;
+ /// Contains all scheduling relevant data for an instruction.
+ /// A ScheduleData either represents a single instruction or a member of an
+ /// instruction bundle (= a group of instructions which is combined into a
+ /// vector instruction).
+ struct ScheduleData {
+
+ // The initial value for the dependency counters. It means that the
+ // dependencies are not calculated yet.
+ enum { InvalidDeps = -1 };
+
+ ScheduleData()
+ : Inst(nullptr), FirstInBundle(nullptr), NextInBundle(nullptr),
+ NextLoadStore(nullptr), SchedulingRegionID(0), SchedulingPriority(0),
+ Dependencies(InvalidDeps), UnscheduledDeps(InvalidDeps),
+ UnscheduledDepsInBundle(InvalidDeps), IsScheduled(false) {}
+
+ void init(int BlockSchedulingRegionID) {
+ FirstInBundle = this;
+ NextInBundle = nullptr;
+ NextLoadStore = nullptr;
+ IsScheduled = false;
+ SchedulingRegionID = BlockSchedulingRegionID;
+ UnscheduledDepsInBundle = UnscheduledDeps;
+ clearDependencies();
+ }
+
+ /// Returns true if the dependency information has been calculated.
+ bool hasValidDependencies() const { return Dependencies != InvalidDeps; }
+
+ /// Returns true for single instructions and for bundle representatives
+ /// (= the head of a bundle).
+ bool isSchedulingEntity() const { return FirstInBundle == this; }
+
+ /// Returns true if it represents an instruction bundle and not only a
+ /// single instruction.
+ bool isPartOfBundle() const {
+ return NextInBundle != nullptr || FirstInBundle != this;
+ }
+
+ /// Returns true if it is ready for scheduling, i.e. it has no more
+ /// unscheduled depending instructions/bundles.
+ bool isReady() const {
+ assert(isSchedulingEntity() &&
+ "can't consider non-scheduling entity for ready list");
+ return UnscheduledDepsInBundle == 0 && !IsScheduled;
+ }
+
+ /// Modifies the number of unscheduled dependencies, also updating it for
+ /// the whole bundle.
+ int incrementUnscheduledDeps(int Incr) {
+ UnscheduledDeps += Incr;
+ return FirstInBundle->UnscheduledDepsInBundle += Incr;
+ }
+
+ /// Sets the number of unscheduled dependencies to the number of
+ /// dependencies.
+ void resetUnscheduledDeps() {
+ incrementUnscheduledDeps(Dependencies - UnscheduledDeps);
+ }
+
+ /// Clears all dependency information.
+ void clearDependencies() {
+ Dependencies = InvalidDeps;
+ resetUnscheduledDeps();
+ MemoryDependencies.clear();
+ }
+
+ void dump(raw_ostream &os) const {
+ if (!isSchedulingEntity()) {
+ os << "/ " << *Inst;
+ } else if (NextInBundle) {
+ os << '[' << *Inst;
+ ScheduleData *SD = NextInBundle;
+ while (SD) {
+ os << ';' << *SD->Inst;
+ SD = SD->NextInBundle;
+ }
+ os << ']';
+ } else {
+ os << *Inst;
+ }
+ }
- /// \brief Get the corresponding instruction numbering list for a given
- /// BasicBlock. The list is allocated lazily.
- BlockNumbering &getBlockNumbering(BasicBlock *BB) {
- auto I = BlocksNumbers.insert(std::make_pair(BB, BlockNumbering(BB)));
- return I.first->second;
- }
+ Instruction *Inst;
+
+ /// Points to the head in an instruction bundle (and always to this for
+ /// single instructions).
+ ScheduleData *FirstInBundle;
+
+ /// Single linked list of all instructions in a bundle. Null if it is a
+ /// single instruction.
+ ScheduleData *NextInBundle;
+
+ /// Single linked list of all memory instructions (e.g. load, store, call)
+ /// in the block - until the end of the scheduling region.
+ ScheduleData *NextLoadStore;
+
+ /// The dependent memory instructions.
+ /// This list is derived on demand in calculateDependencies().
+ SmallVector<ScheduleData *, 4> MemoryDependencies;
+
+ /// This ScheduleData is in the current scheduling region if this matches
+ /// the current SchedulingRegionID of BlockScheduling.
+ int SchedulingRegionID;
+
+ /// Used for getting a "good" final ordering of instructions.
+ int SchedulingPriority;
+
+ /// The number of dependencies. Constitutes of the number of users of the
+ /// instruction plus the number of dependent memory instructions (if any).
+ /// This value is calculated on demand.
+ /// If InvalidDeps, the number of dependencies is not calculated yet.
+ ///
+ int Dependencies;
+
+ /// The number of dependencies minus the number of dependencies of scheduled
+ /// instructions. As soon as this is zero, the instruction/bundle gets ready
+ /// for scheduling.
+ /// Note that this is negative as long as Dependencies is not calculated.
+ int UnscheduledDeps;
+
+ /// The sum of UnscheduledDeps in a bundle. Equals to UnscheduledDeps for
+ /// single instructions.
+ int UnscheduledDepsInBundle;
+
+ /// True if this instruction is scheduled (or considered as scheduled in the
+ /// dry-run).
+ bool IsScheduled;
+ };
+
+#ifndef NDEBUG
+ friend raw_ostream &operator<<(raw_ostream &os,
+ const BoUpSLP::ScheduleData &SD);
+#endif
+
+ /// Contains all scheduling data for a basic block.
+ ///
+ struct BlockScheduling {
+
+ BlockScheduling(BasicBlock *BB)
+ : BB(BB), ChunkSize(BB->size()), ChunkPos(ChunkSize),
+ ScheduleStart(nullptr), ScheduleEnd(nullptr),
+ FirstLoadStoreInRegion(nullptr), LastLoadStoreInRegion(nullptr),
+ // Make sure that the initial SchedulingRegionID is greater than the
+ // initial SchedulingRegionID in ScheduleData (which is 0).
+ SchedulingRegionID(1) {}
+
+ void clear() {
+ ReadyInsts.clear();
+ ScheduleStart = nullptr;
+ ScheduleEnd = nullptr;
+ FirstLoadStoreInRegion = nullptr;
+ LastLoadStoreInRegion = nullptr;
+
+ // Make a new scheduling region, i.e. all existing ScheduleData is not
+ // in the new region yet.
+ ++SchedulingRegionID;
+ }
+
+ ScheduleData *getScheduleData(Value *V) {
+ ScheduleData *SD = ScheduleDataMap[V];
+ if (SD && SD->SchedulingRegionID == SchedulingRegionID)
+ return SD;
+ return nullptr;
+ }
+
+ bool isInSchedulingRegion(ScheduleData *SD) {
+ return SD->SchedulingRegionID == SchedulingRegionID;
+ }
+
+ /// Marks an instruction as scheduled and puts all dependent ready
+ /// instructions into the ready-list.
+ template <typename ReadyListType>
+ void schedule(ScheduleData *SD, ReadyListType &ReadyList) {
+ SD->IsScheduled = true;
+ DEBUG(dbgs() << "SLP: schedule " << *SD << "\n");
+
+ ScheduleData *BundleMember = SD;
+ while (BundleMember) {
+ // Handle the def-use chain dependencies.
+ for (Use &U : BundleMember->Inst->operands()) {
+ ScheduleData *OpDef = getScheduleData(U.get());
+ if (OpDef && OpDef->hasValidDependencies() &&
+ OpDef->incrementUnscheduledDeps(-1) == 0) {
+ // There are no more unscheduled dependencies after decrementing,
+ // so we can put the dependent instruction into the ready list.
+ ScheduleData *DepBundle = OpDef->FirstInBundle;
+ assert(!DepBundle->IsScheduled &&
+ "already scheduled bundle gets ready");
+ ReadyList.insert(DepBundle);
+ DEBUG(dbgs() << "SLP: gets ready (def): " << *DepBundle << "\n");
+ }
+ }
+ // Handle the memory dependencies.
+ for (ScheduleData *MemoryDepSD : BundleMember->MemoryDependencies) {
+ if (MemoryDepSD->incrementUnscheduledDeps(-1) == 0) {
+ // There are no more unscheduled dependencies after decrementing,
+ // so we can put the dependent instruction into the ready list.
+ ScheduleData *DepBundle = MemoryDepSD->FirstInBundle;
+ assert(!DepBundle->IsScheduled &&
+ "already scheduled bundle gets ready");
+ ReadyList.insert(DepBundle);
+ DEBUG(dbgs() << "SLP: gets ready (mem): " << *DepBundle << "\n");
+ }
+ }
+ BundleMember = BundleMember->NextInBundle;
+ }
+ }
+
+ /// Put all instructions into the ReadyList which are ready for scheduling.
+ template <typename ReadyListType>
+ void initialFillReadyList(ReadyListType &ReadyList) {
+ for (auto *I = ScheduleStart; I != ScheduleEnd; I = I->getNextNode()) {
+ ScheduleData *SD = getScheduleData(I);
+ if (SD->isSchedulingEntity() && SD->isReady()) {
+ ReadyList.insert(SD);
+ DEBUG(dbgs() << "SLP: initially in ready list: " << *I << "\n");
+ }
+ }
+ }
+
+ /// Checks if a bundle of instructions can be scheduled, i.e. has no
+ /// cyclic dependencies. This is only a dry-run, no instructions are
+ /// actually moved at this stage.
+ bool tryScheduleBundle(ArrayRef<Value *> VL, BoUpSLP *SLP);
+
+ /// Un-bundles a group of instructions.
+ void cancelScheduling(ArrayRef<Value *> VL);
+
+ /// Extends the scheduling region so that V is inside the region.
+ void extendSchedulingRegion(Value *V);
+
+ /// Initialize the ScheduleData structures for new instructions in the
+ /// scheduling region.
+ void initScheduleData(Instruction *FromI, Instruction *ToI,
+ ScheduleData *PrevLoadStore,
+ ScheduleData *NextLoadStore);
+
+ /// Updates the dependency information of a bundle and of all instructions/
+ /// bundles which depend on the original bundle.
+ void calculateDependencies(ScheduleData *SD, bool InsertInReadyList,
+ BoUpSLP *SLP);
+
+ /// Sets all instruction in the scheduling region to un-scheduled.
+ void resetSchedule();
+
+ BasicBlock *BB;
+
+ /// Simple memory allocation for ScheduleData.
+ std::vector<std::unique_ptr<ScheduleData[]>> ScheduleDataChunks;
+
+ /// The size of a ScheduleData array in ScheduleDataChunks.
+ int ChunkSize;
+
+ /// The allocator position in the current chunk, which is the last entry
+ /// of ScheduleDataChunks.
+ int ChunkPos;
+
+ /// Attaches ScheduleData to Instruction.
+ /// Note that the mapping survives during all vectorization iterations, i.e.
+ /// ScheduleData structures are recycled.
+ DenseMap<Value *, ScheduleData *> ScheduleDataMap;
+
+ struct ReadyList : SmallVector<ScheduleData *, 8> {
+ void insert(ScheduleData *SD) { push_back(SD); }
+ };
+
+ /// The ready-list for scheduling (only used for the dry-run).
+ ReadyList ReadyInsts;
+
+ /// The first instruction of the scheduling region.
+ Instruction *ScheduleStart;
+
+ /// The first instruction _after_ the scheduling region.
+ Instruction *ScheduleEnd;
+
+ /// The first memory accessing instruction in the scheduling region
+ /// (can be null).
+ ScheduleData *FirstLoadStoreInRegion;
+
+ /// The last memory accessing instruction in the scheduling region
+ /// (can be null).
+ ScheduleData *LastLoadStoreInRegion;
+
+ /// The ID of the scheduling region. For a new vectorization iteration this
+ /// is incremented which "removes" all ScheduleData from the region.
+ int SchedulingRegionID;
+ };
+
+ /// Attaches the BlockScheduling structures to basic blocks.
+ DenseMap<BasicBlock *, std::unique_ptr<BlockScheduling>> BlocksSchedules;
+
+ /// Performs the "real" scheduling. Done before vectorization is actually
+ /// performed in a basic block.
+ void scheduleBlock(BlockScheduling *BS);
/// List of users to ignore during scheduling and that don't need extracting.
ArrayRef<Value *> UserIgnoreList;
+ // Number of load-bundles, which contain consecutive loads.
+ int NumLoadsWantToKeepOrder;
+
+ // Number of load-bundles of size 2, which are consecutive loads if reversed.
+ int NumLoadsWantToChangeOrder;
+
// Analysis and block reference.
Function *F;
ScalarEvolution *SE;
IRBuilder<> Builder;
};
+#ifndef NDEBUG
+raw_ostream &operator<<(raw_ostream &os, const BoUpSLP::ScheduleData &SD) {
+ SD.dump(os);
+ return os;
+}
+#endif
+
void BoUpSLP::buildTree(ArrayRef<Value *> Roots,
ArrayRef<Value *> UserIgnoreLst) {
deleteTree();
for (User *U : Scalar->users()) {
DEBUG(dbgs() << "SLP: Checking user:" << *U << ".\n");
- // Skip in-tree scalars that become vectors.
- if (ScalarToTreeEntry.count(U)) {
- DEBUG(dbgs() << "SLP: \tInternal user will be removed:" <<
- *U << ".\n");
- int Idx = ScalarToTreeEntry[U]; (void) Idx;
- assert(!VectorizableTree[Idx].NeedToGather && "Bad state");
- continue;
- }
Instruction *UserInst = dyn_cast<Instruction>(U);
if (!UserInst)
continue;
+ // Skip in-tree scalars that become vectors
+ if (ScalarToTreeEntry.count(U)) {
+ int Idx = ScalarToTreeEntry[U];
+ TreeEntry *UseEntry = &VectorizableTree[Idx];
+ Value *UseScalar = UseEntry->Scalars[0];
+ // Some in-tree scalars will remain as scalar in vectorized
+ // instructions. If that is the case, the one in Lane 0 will
+ // be used.
+ if (UseScalar != U ||
+ !InTreeUserNeedToExtract(Scalar, UserInst, TLI)) {
+ DEBUG(dbgs() << "SLP: \tInternal user will be removed:" << *U
+ << ".\n");
+ assert(!VectorizableTree[Idx].NeedToGather && "Bad state");
+ continue;
+ }
+ }
+
// Ignore users in the user ignore list.
if (std::find(UserIgnoreList.begin(), UserIgnoreList.end(), UserInst) !=
UserIgnoreList.end())
// We now know that this is a vector of instructions of the same type from
// the same block.
+ // Don't vectorize ephemeral values.
+ for (unsigned i = 0, e = VL.size(); i != e; ++i) {
+ if (EphValues.count(VL[i])) {
+ DEBUG(dbgs() << "SLP: The instruction (" << *VL[i] <<
+ ") is ephemeral.\n");
+ newTreeEntry(VL, false);
+ return;
+ }
+ }
+
// Check if this is a duplicate of another entry.
if (ScalarToTreeEntry.count(VL[0])) {
int Idx = ScalarToTreeEntry[VL[0]];
}
}
- // If any of the scalars appears in the table OR it is marked as a value that
- // needs to stat scalar then we need to gather the scalars.
+ // If any of the scalars is marked as a value that needs to stay scalar then
+ // we need to gather the scalars.
for (unsigned i = 0, e = VL.size(); i != e; ++i) {
- if (ScalarToTreeEntry.count(VL[i]) || MustGather.count(VL[i])) {
- DEBUG(dbgs() << "SLP: Gathering due to gathered scalar. \n");
+ if (MustGather.count(VL[i])) {
+ DEBUG(dbgs() << "SLP: Gathering due to gathered scalar.\n");
newTreeEntry(VL, false);
return;
}
// Check that all of the users of the scalars that we want to vectorize are
// schedulable.
Instruction *VL0 = cast<Instruction>(VL[0]);
- int MyLastIndex = getLastIndex(VL);
BasicBlock *BB = cast<Instruction>(VL0)->getParent();
- for (unsigned i = 0, e = VL.size(); i != e; ++i) {
- Instruction *Scalar = cast<Instruction>(VL[i]);
- DEBUG(dbgs() << "SLP: Checking users of " << *Scalar << ". \n");
- for (User *U : Scalar->users()) {
- DEBUG(dbgs() << "SLP: \tUser " << *U << ". \n");
- Instruction *UI = dyn_cast<Instruction>(U);
- if (!UI) {
- DEBUG(dbgs() << "SLP: Gathering due unknown user. \n");
- newTreeEntry(VL, false);
- return;
- }
-
- // We don't care if the user is in a different basic block.
- BasicBlock *UserBlock = UI->getParent();
- if (UserBlock != BB) {
- DEBUG(dbgs() << "SLP: User from a different basic block "
- << *UI << ". \n");
- continue;
- }
-
- // If this is a PHINode within this basic block then we can place the
- // extract wherever we want.
- if (isa<PHINode>(*UI)) {
- DEBUG(dbgs() << "SLP: \tWe can schedule PHIs:" << *UI << ". \n");
- continue;
- }
-
- // Check if this is a safe in-tree user.
- if (ScalarToTreeEntry.count(UI)) {
- int Idx = ScalarToTreeEntry[UI];
- int VecLocation = VectorizableTree[Idx].LastScalarIndex;
- if (VecLocation <= MyLastIndex) {
- DEBUG(dbgs() << "SLP: Gathering due to unschedulable vector. \n");
- newTreeEntry(VL, false);
- return;
- }
- DEBUG(dbgs() << "SLP: In-tree user (" << *UI << ") at #" <<
- VecLocation << " vector value (" << *Scalar << ") at #"
- << MyLastIndex << ".\n");
- continue;
- }
-
- // Ignore users in the user ignore list.
- if (std::find(UserIgnoreList.begin(), UserIgnoreList.end(), UI) !=
- UserIgnoreList.end())
- continue;
-
- // Make sure that we can schedule this unknown user.
- BlockNumbering &BN = getBlockNumbering(BB);
- int UserIndex = BN.getIndex(UI);
- if (UserIndex < MyLastIndex) {
-
- DEBUG(dbgs() << "SLP: Can't schedule extractelement for "
- << *UI << ". \n");
- newTreeEntry(VL, false);
- return;
- }
- }
+ if (!DT->isReachableFromEntry(BB)) {
+ // Don't go into unreachable blocks. They may contain instructions with
+ // dependency cycles which confuse the final scheduling.
+ DEBUG(dbgs() << "SLP: bundle in unreachable block.\n");
+ newTreeEntry(VL, false);
+ return;
}
-
+
// Check that every instructions appears once in this bundle.
for (unsigned i = 0, e = VL.size(); i < e; ++i)
for (unsigned j = i+1; j < e; ++j)
return;
}
- // Check that instructions in this bundle don't reference other instructions.
- // The runtime of this check is O(N * N-1 * uses(N)) and a typical N is 4.
- for (unsigned i = 0, e = VL.size(); i < e; ++i) {
- for (User *U : VL[i]->users()) {
- for (unsigned j = 0; j < e; ++j) {
- if (i != j && U == VL[j]) {
- DEBUG(dbgs() << "SLP: Intra-bundle dependencies!" << *U << ". \n");
- newTreeEntry(VL, false);
- return;
- }
- }
- }
+ auto &BSRef = BlocksSchedules[BB];
+ if (!BSRef) {
+ BSRef = llvm::make_unique<BlockScheduling>(BB);
}
+ BlockScheduling &BS = *BSRef.get();
- DEBUG(dbgs() << "SLP: We are able to schedule this bundle.\n");
-
- // Check if it is safe to sink the loads or the stores.
- if (Opcode == Instruction::Load || Opcode == Instruction::Store) {
- Instruction *Last = getLastInstruction(VL);
-
- for (unsigned i = 0, e = VL.size(); i < e; ++i) {
- if (VL[i] == Last)
- continue;
- Value *Barrier = getSinkBarrier(cast<Instruction>(VL[i]), Last);
- if (Barrier) {
- DEBUG(dbgs() << "SLP: Can't sink " << *VL[i] << "\n down to " << *Last
- << "\n because of " << *Barrier << ". Gathering.\n");
- newTreeEntry(VL, false);
- return;
- }
- }
+ if (!BS.tryScheduleBundle(VL, this)) {
+ DEBUG(dbgs() << "SLP: We are not able to schedule this bundle!\n");
+ BS.cancelScheduling(VL);
+ newTreeEntry(VL, false);
+ return;
}
+ DEBUG(dbgs() << "SLP: We are able to schedule this bundle.\n");
switch (Opcode) {
case Instruction::PHI: {
cast<PHINode>(VL[j])->getIncomingValueForBlock(PH->getIncomingBlock(i)));
if (Term) {
DEBUG(dbgs() << "SLP: Need to swizzle PHINodes (TerminatorInst use).\n");
+ BS.cancelScheduling(VL);
newTreeEntry(VL, false);
return;
}
bool Reuse = CanReuseExtract(VL);
if (Reuse) {
DEBUG(dbgs() << "SLP: Reusing extract sequence.\n");
+ } else {
+ BS.cancelScheduling(VL);
}
newTreeEntry(VL, Reuse);
return;
// Check if the loads are consecutive or of we need to swizzle them.
for (unsigned i = 0, e = VL.size() - 1; i < e; ++i) {
LoadInst *L = cast<LoadInst>(VL[i]);
- if (!L->isSimple() || !isConsecutiveAccess(VL[i], VL[i + 1])) {
+ if (!L->isSimple()) {
+ BS.cancelScheduling(VL);
newTreeEntry(VL, false);
- DEBUG(dbgs() << "SLP: Need to swizzle loads.\n");
+ DEBUG(dbgs() << "SLP: Gathering non-simple loads.\n");
+ return;
+ }
+ if (!isConsecutiveAccess(VL[i], VL[i + 1])) {
+ if (VL.size() == 2 && isConsecutiveAccess(VL[1], VL[0])) {
+ ++NumLoadsWantToChangeOrder;
+ }
+ BS.cancelScheduling(VL);
+ newTreeEntry(VL, false);
+ DEBUG(dbgs() << "SLP: Gathering non-consecutive loads.\n");
return;
}
}
+ ++NumLoadsWantToKeepOrder;
newTreeEntry(VL, true);
DEBUG(dbgs() << "SLP: added a vector of loads.\n");
return;
for (unsigned i = 0; i < VL.size(); ++i) {
Type *Ty = cast<Instruction>(VL[i])->getOperand(0)->getType();
if (Ty != SrcTy || Ty->isAggregateType() || Ty->isVectorTy()) {
+ BS.cancelScheduling(VL);
newTreeEntry(VL, false);
DEBUG(dbgs() << "SLP: Gathering casts with different src types.\n");
return;
CmpInst *Cmp = cast<CmpInst>(VL[i]);
if (Cmp->getPredicate() != P0 ||
Cmp->getOperand(0)->getType() != ComparedTy) {
+ BS.cancelScheduling(VL);
newTreeEntry(VL, false);
DEBUG(dbgs() << "SLP: Gathering cmp with different predicate.\n");
return;
if (isa<BinaryOperator>(VL0) && VL0->isCommutative()) {
ValueList Left, Right;
reorderInputsAccordingToOpcode(VL, Left, Right);
- BasicBlock *LeftBB = getSameBlock(Left);
- BasicBlock *RightBB = getSameBlock(Right);
- // If we have common uses on separate paths in the tree make sure we
- // process the one with greater common depth first.
- // We can use block numbering to determine the subtree traversal as
- // earler user has to come in between the common use and the later user.
- if (LeftBB && RightBB && LeftBB == RightBB &&
- getLastIndex(Right) > getLastIndex(Left)) {
- buildTree_rec(Right, Depth + 1);
- buildTree_rec(Left, Depth + 1);
- } else {
- buildTree_rec(Left, Depth + 1);
- buildTree_rec(Right, Depth + 1);
- }
+ buildTree_rec(Left, Depth + 1);
+ buildTree_rec(Right, Depth + 1);
return;
}
for (unsigned j = 0; j < VL.size(); ++j) {
if (cast<Instruction>(VL[j])->getNumOperands() != 2) {
DEBUG(dbgs() << "SLP: not-vectorizable GEP (nested indexes).\n");
+ BS.cancelScheduling(VL);
newTreeEntry(VL, false);
return;
}
Type *CurTy = cast<Instruction>(VL[j])->getOperand(0)->getType();
if (Ty0 != CurTy) {
DEBUG(dbgs() << "SLP: not-vectorizable GEP (different types).\n");
+ BS.cancelScheduling(VL);
newTreeEntry(VL, false);
return;
}
if (!isa<ConstantInt>(Op)) {
DEBUG(
dbgs() << "SLP: not-vectorizable GEP (non-constant indexes).\n");
+ BS.cancelScheduling(VL);
newTreeEntry(VL, false);
return;
}
// Check if the stores are consecutive or of we need to swizzle them.
for (unsigned i = 0, e = VL.size() - 1; i < e; ++i)
if (!isConsecutiveAccess(VL[i], VL[i + 1])) {
+ BS.cancelScheduling(VL);
newTreeEntry(VL, false);
DEBUG(dbgs() << "SLP: Non-consecutive store.\n");
return;
for (unsigned j = 0; j < VL.size(); ++j)
Operands.push_back(cast<Instruction>(VL[j])->getOperand(0));
- // We can ignore these values because we are sinking them down.
- MemBarrierIgnoreList.insert(VL.begin(), VL.end());
buildTree_rec(Operands, Depth + 1);
return;
}
// represented by an intrinsic call
Intrinsic::ID ID = getIntrinsicIDForCall(CI, TLI);
if (!isTriviallyVectorizable(ID)) {
+ BS.cancelScheduling(VL);
newTreeEntry(VL, false);
DEBUG(dbgs() << "SLP: Non-vectorizable call.\n");
return;
CallInst *CI2 = dyn_cast<CallInst>(VL[i]);
if (!CI2 || CI2->getCalledFunction() != Int ||
getIntrinsicIDForCall(CI2, TLI) != ID) {
+ BS.cancelScheduling(VL);
newTreeEntry(VL, false);
DEBUG(dbgs() << "SLP: mismatched calls:" << *CI << "!=" << *VL[i]
<< "\n");
if (hasVectorInstrinsicScalarOpd(ID, 1)) {
Value *A1J = CI2->getArgOperand(1);
if (A1I != A1J) {
+ BS.cancelScheduling(VL);
newTreeEntry(VL, false);
DEBUG(dbgs() << "SLP: mismatched arguments in call:" << *CI
<< " argument "<< A1I<<"!=" << A1J
// If this is not an alternate sequence of opcode like add-sub
// then do not vectorize this instruction.
if (!isAltShuffle) {
+ BS.cancelScheduling(VL);
newTreeEntry(VL, false);
DEBUG(dbgs() << "SLP: ShuffleVector are not vectorized.\n");
return;
return;
}
default:
+ BS.cancelScheduling(VL);
newTreeEntry(VL, false);
DEBUG(dbgs() << "SLP: Gathering unknown instruction.\n");
return;
TargetTransformInfo::OK_AnyValue;
TargetTransformInfo::OperandValueKind Op2VK =
TargetTransformInfo::OK_UniformConstantValue;
+ TargetTransformInfo::OperandValueProperties Op1VP =
+ TargetTransformInfo::OP_None;
+ TargetTransformInfo::OperandValueProperties Op2VP =
+ TargetTransformInfo::OP_None;
// If all operands are exactly the same ConstantInt then set the
// operand kind to OK_UniformConstantValue.
CInt != cast<ConstantInt>(I->getOperand(1)))
Op2VK = TargetTransformInfo::OK_NonUniformConstantValue;
}
+ // FIXME: Currently cost of model modification for division by
+ // power of 2 is handled only for X86. Add support for other targets.
+ if (Op2VK == TargetTransformInfo::OK_UniformConstantValue && CInt &&
+ CInt->getValue().isPowerOf2())
+ Op2VP = TargetTransformInfo::OP_PowerOf2;
- ScalarCost =
- VecTy->getNumElements() *
- TTI->getArithmeticInstrCost(Opcode, ScalarTy, Op1VK, Op2VK);
- VecCost = TTI->getArithmeticInstrCost(Opcode, VecTy, Op1VK, Op2VK);
+ ScalarCost = VecTy->getNumElements() *
+ TTI->getArithmeticInstrCost(Opcode, ScalarTy, Op1VK, Op2VK,
+ Op1VP, Op2VP);
+ VecCost = TTI->getArithmeticInstrCost(Opcode, VecTy, Op1VK, Op2VK,
+ Op1VP, Op2VP);
}
return VecCost - ScalarCost;
}
return true;
}
+int BoUpSLP::getSpillCost() {
+ // Walk from the bottom of the tree to the top, tracking which values are
+ // live. When we see a call instruction that is not part of our tree,
+ // query TTI to see if there is a cost to keeping values live over it
+ // (for example, if spills and fills are required).
+ unsigned BundleWidth = VectorizableTree.front().Scalars.size();
+ int Cost = 0;
+
+ SmallPtrSet<Instruction*, 4> LiveValues;
+ Instruction *PrevInst = nullptr;
+
+ for (unsigned N = 0; N < VectorizableTree.size(); ++N) {
+ Instruction *Inst = dyn_cast<Instruction>(VectorizableTree[N].Scalars[0]);
+ if (!Inst)
+ continue;
+
+ if (!PrevInst) {
+ PrevInst = Inst;
+ continue;
+ }
+
+ DEBUG(
+ dbgs() << "SLP: #LV: " << LiveValues.size();
+ for (auto *X : LiveValues)
+ dbgs() << " " << X->getName();
+ dbgs() << ", Looking at ";
+ Inst->dump();
+ );
+
+ // Update LiveValues.
+ LiveValues.erase(PrevInst);
+ for (auto &J : PrevInst->operands()) {
+ if (isa<Instruction>(&*J) && ScalarToTreeEntry.count(&*J))
+ LiveValues.insert(cast<Instruction>(&*J));
+ }
+
+ // Now find the sequence of instructions between PrevInst and Inst.
+ BasicBlock::reverse_iterator InstIt(Inst), PrevInstIt(PrevInst);
+ --PrevInstIt;
+ while (InstIt != PrevInstIt) {
+ if (PrevInstIt == PrevInst->getParent()->rend()) {
+ PrevInstIt = Inst->getParent()->rbegin();
+ continue;
+ }
+
+ if (isa<CallInst>(&*PrevInstIt) && &*PrevInstIt != PrevInst) {
+ SmallVector<Type*, 4> V;
+ for (auto *II : LiveValues)
+ V.push_back(VectorType::get(II->getType(), BundleWidth));
+ Cost += TTI->getCostOfKeepingLiveOverCall(V);
+ }
+
+ ++PrevInstIt;
+ }
+
+ PrevInst = Inst;
+ }
+
+ DEBUG(dbgs() << "SLP: SpillCost=" << Cost << "\n");
+ return Cost;
+}
+
int BoUpSLP::getTreeCost() {
int Cost = 0;
DEBUG(dbgs() << "SLP: Calculating cost for tree of size " <<
for (UserList::iterator I = ExternalUses.begin(), E = ExternalUses.end();
I != E; ++I) {
// We only add extract cost once for the same scalar.
- if (!ExtractCostCalculated.insert(I->Scalar))
+ if (!ExtractCostCalculated.insert(I->Scalar).second)
+ continue;
+
+ // Uses by ephemeral values are free (because the ephemeral value will be
+ // removed prior to code generation, and so the extraction will be
+ // removed as well).
+ if (EphValues.count(I->User))
continue;
VectorType *VecTy = VectorType::get(I->Scalar->getType(), BundleWidth);
I->Lane);
}
+ Cost += getSpillCost();
+
DEBUG(dbgs() << "SLP: Total Cost " << Cost + ExtractCost<< ".\n");
return Cost + ExtractCost;
}
return getGatherCost(VecTy);
}
-AliasAnalysis::Location BoUpSLP::getLocation(Instruction *I) {
- if (StoreInst *SI = dyn_cast<StoreInst>(I))
- return AA->getLocation(SI);
- if (LoadInst *LI = dyn_cast<LoadInst>(I))
- return AA->getLocation(LI);
- return AliasAnalysis::Location();
-}
-
Value *BoUpSLP::getPointerOperand(Value *I) {
if (LoadInst *LI = dyn_cast<LoadInst>(I))
return LI->getPointerOperand();
return X == PtrSCEVB;
}
-Value *BoUpSLP::getSinkBarrier(Instruction *Src, Instruction *Dst) {
- assert(Src->getParent() == Dst->getParent() && "Not the same BB");
- BasicBlock::iterator I = Src, E = Dst;
- /// Scan all of the instruction from SRC to DST and check if
- /// the source may alias.
- for (++I; I != E; ++I) {
- // Ignore store instructions that are marked as 'ignore'.
- if (MemBarrierIgnoreList.count(I))
- continue;
- if (Src->mayWriteToMemory()) /* Write */ {
- if (!I->mayReadOrWriteMemory())
- continue;
- } else /* Read */ {
- if (!I->mayWriteToMemory())
- continue;
- }
- AliasAnalysis::Location A = getLocation(&*I);
- AliasAnalysis::Location B = getLocation(Src);
-
- if (!A.Ptr || !B.Ptr || AA->alias(A, B))
- return I;
- }
- return nullptr;
-}
-
-int BoUpSLP::getLastIndex(ArrayRef<Value *> VL) {
- BasicBlock *BB = cast<Instruction>(VL[0])->getParent();
- assert(BB == getSameBlock(VL) && "Invalid block");
- BlockNumbering &BN = getBlockNumbering(BB);
-
- int MaxIdx = BN.getIndex(BB->getFirstNonPHI());
- for (unsigned i = 0, e = VL.size(); i < e; ++i)
- MaxIdx = std::max(MaxIdx, BN.getIndex(cast<Instruction>(VL[i])));
- return MaxIdx;
-}
-
-Instruction *BoUpSLP::getLastInstruction(ArrayRef<Value *> VL) {
- BasicBlock *BB = cast<Instruction>(VL[0])->getParent();
- assert(BB == getSameBlock(VL) && "Invalid block");
- BlockNumbering &BN = getBlockNumbering(BB);
-
- int MaxIdx = BN.getIndex(cast<Instruction>(VL[0]));
- for (unsigned i = 1, e = VL.size(); i < e; ++i)
- MaxIdx = std::max(MaxIdx, BN.getIndex(cast<Instruction>(VL[i])));
- Instruction *I = BN.getInstruction(MaxIdx);
- assert(I && "bad location");
- return I;
-}
-
void BoUpSLP::setInsertPointAfterBundle(ArrayRef<Value *> VL) {
Instruction *VL0 = cast<Instruction>(VL[0]);
- Instruction *LastInst = getLastInstruction(VL);
- BasicBlock::iterator NextInst = LastInst;
+ BasicBlock::iterator NextInst = VL0;
++NextInst;
Builder.SetInsertPoint(VL0->getParent(), NextInst);
Builder.SetCurrentDebugLocation(VL0->getDebugLoc());
setInsertPointAfterBundle(E->Scalars);
return Gather(E->Scalars, VecTy);
}
+
unsigned Opcode = getSameOpcode(E->Scalars);
switch (Opcode) {
ValueList Operands;
BasicBlock *IBB = PH->getIncomingBlock(i);
- if (!VisitedBBs.insert(IBB)) {
+ if (!VisitedBBs.insert(IBB).second) {
NewPhi->addIncoming(NewPhi->getIncomingValueForBlock(IBB), IBB);
continue;
}
CastInst *CI = dyn_cast<CastInst>(VL0);
Value *V = Builder.CreateCast(CI->getOpcode(), InVec, VecTy);
E->VectorizedValue = V;
+ ++NumVectorInstructions;
return V;
}
case Instruction::FCmp:
V = Builder.CreateICmp(P0, L, R);
E->VectorizedValue = V;
+ ++NumVectorInstructions;
return V;
}
case Instruction::Select: {
Value *V = Builder.CreateSelect(Cond, True, False);
E->VectorizedValue = V;
+ ++NumVectorInstructions;
return V;
}
case Instruction::Add:
BinaryOperator *BinOp = cast<BinaryOperator>(VL0);
Value *V = Builder.CreateBinOp(BinOp->getOpcode(), LHS, RHS);
E->VectorizedValue = V;
+ propagateIRFlags(E->VectorizedValue, E->Scalars);
+ ++NumVectorInstructions;
if (Instruction *I = dyn_cast<Instruction>(V))
return propagateMetadata(I, E->Scalars);
setInsertPointAfterBundle(E->Scalars);
LoadInst *LI = cast<LoadInst>(VL0);
+ Type *ScalarLoadTy = LI->getType();
unsigned AS = LI->getPointerAddressSpace();
Value *VecPtr = Builder.CreateBitCast(LI->getPointerOperand(),
VecTy->getPointerTo(AS));
+
+ // The pointer operand uses an in-tree scalar so we add the new BitCast to
+ // ExternalUses list to make sure that an extract will be generated in the
+ // future.
+ if (ScalarToTreeEntry.count(LI->getPointerOperand()))
+ ExternalUses.push_back(
+ ExternalUser(LI->getPointerOperand(), cast<User>(VecPtr), 0));
+
unsigned Alignment = LI->getAlignment();
LI = Builder.CreateLoad(VecPtr);
if (!Alignment)
- Alignment = DL->getABITypeAlignment(LI->getPointerOperand()->getType());
+ Alignment = DL->getABITypeAlignment(ScalarLoadTy);
LI->setAlignment(Alignment);
E->VectorizedValue = LI;
+ ++NumVectorInstructions;
return propagateMetadata(LI, E->Scalars);
}
case Instruction::Store: {
Value *VecPtr = Builder.CreateBitCast(SI->getPointerOperand(),
VecTy->getPointerTo(AS));
StoreInst *S = Builder.CreateStore(VecValue, VecPtr);
+
+ // The pointer operand uses an in-tree scalar so we add the new BitCast to
+ // ExternalUses list to make sure that an extract will be generated in the
+ // future.
+ if (ScalarToTreeEntry.count(SI->getPointerOperand()))
+ ExternalUses.push_back(
+ ExternalUser(SI->getPointerOperand(), cast<User>(VecPtr), 0));
+
if (!Alignment)
- Alignment = DL->getABITypeAlignment(SI->getPointerOperand()->getType());
+ Alignment = DL->getABITypeAlignment(SI->getValueOperand()->getType());
S->setAlignment(Alignment);
E->VectorizedValue = S;
+ ++NumVectorInstructions;
return propagateMetadata(S, E->Scalars);
}
case Instruction::GetElementPtr: {
Value *V = Builder.CreateGEP(Op0, OpVecs);
E->VectorizedValue = V;
+ ++NumVectorInstructions;
if (Instruction *I = dyn_cast<Instruction>(V))
return propagateMetadata(I, E->Scalars);
setInsertPointAfterBundle(E->Scalars);
Function *FI;
Intrinsic::ID IID = Intrinsic::not_intrinsic;
+ Value *ScalarArg = nullptr;
if (CI && (FI = CI->getCalledFunction())) {
IID = (Intrinsic::ID) FI->getIntrinsicID();
}
// a scalar. This argument should not be vectorized.
if (hasVectorInstrinsicScalarOpd(IID, 1) && j == 1) {
CallInst *CEI = cast<CallInst>(E->Scalars[0]);
+ ScalarArg = CEI->getArgOperand(j);
OpVecs.push_back(CEI->getArgOperand(j));
continue;
}
Type *Tys[] = { VectorType::get(CI->getType(), E->Scalars.size()) };
Function *CF = Intrinsic::getDeclaration(M, ID, Tys);
Value *V = Builder.CreateCall(CF, OpVecs);
+
+ // The scalar argument uses an in-tree scalar so we add the new vectorized
+ // call to ExternalUses list to make sure that an extract will be
+ // generated in the future.
+ if (ScalarArg && ScalarToTreeEntry.count(ScalarArg))
+ ExternalUses.push_back(ExternalUser(ScalarArg, cast<User>(V), 0));
+
E->VectorizedValue = V;
+ ++NumVectorInstructions;
return V;
}
case Instruction::ShuffleVector: {
BinaryOperator *BinOp1 = cast<BinaryOperator>(VL1);
Value *V1 = Builder.CreateBinOp(BinOp1->getOpcode(), LHS, RHS);
- // Create appropriate shuffle to take alternative operations from
- // the vector.
- std::vector<Constant *> Mask(E->Scalars.size());
+ // Create shuffle to take alternate operations from the vector.
+ // Also, gather up odd and even scalar ops to propagate IR flags to
+ // each vector operation.
+ ValueList OddScalars, EvenScalars;
unsigned e = E->Scalars.size();
+ SmallVector<Constant *, 8> Mask(e);
for (unsigned i = 0; i < e; ++i) {
- if (i & 1)
+ if (i & 1) {
Mask[i] = Builder.getInt32(e + i);
- else
+ OddScalars.push_back(E->Scalars[i]);
+ } else {
Mask[i] = Builder.getInt32(i);
+ EvenScalars.push_back(E->Scalars[i]);
+ }
}
Value *ShuffleMask = ConstantVector::get(Mask);
+ propagateIRFlags(V0, EvenScalars);
+ propagateIRFlags(V1, OddScalars);
Value *V = Builder.CreateShuffleVector(V0, V1, ShuffleMask);
E->VectorizedValue = V;
+ ++NumVectorInstructions;
if (Instruction *I = dyn_cast<Instruction>(V))
return propagateMetadata(I, E->Scalars);
}
Value *BoUpSLP::vectorizeTree() {
+
+ // All blocks must be scheduled before any instructions are inserted.
+ for (auto &BSIter : BlocksSchedules) {
+ scheduleBlock(BSIter.second.get());
+ }
+
Builder.SetInsertPoint(F->getEntryBlock().begin());
vectorizeTree(&VectorizableTree[0]);
}
}
- for (auto &BN : BlocksNumbers)
- BN.second.forget();
-
Builder.ClearInsertionPoint();
return VectorizableTree[0].VectorizedValue;
GatherSeq.clear();
}
+// Groups the instructions to a bundle (which is then a single scheduling entity)
+// and schedules instructions until the bundle gets ready.
+bool BoUpSLP::BlockScheduling::tryScheduleBundle(ArrayRef<Value *> VL,
+ BoUpSLP *SLP) {
+ if (isa<PHINode>(VL[0]))
+ return true;
+
+ // Initialize the instruction bundle.
+ Instruction *OldScheduleEnd = ScheduleEnd;
+ ScheduleData *PrevInBundle = nullptr;
+ ScheduleData *Bundle = nullptr;
+ bool ReSchedule = false;
+ DEBUG(dbgs() << "SLP: bundle: " << *VL[0] << "\n");
+ for (Value *V : VL) {
+ extendSchedulingRegion(V);
+ ScheduleData *BundleMember = getScheduleData(V);
+ assert(BundleMember &&
+ "no ScheduleData for bundle member (maybe not in same basic block)");
+ if (BundleMember->IsScheduled) {
+ // A bundle member was scheduled as single instruction before and now
+ // needs to be scheduled as part of the bundle. We just get rid of the
+ // existing schedule.
+ DEBUG(dbgs() << "SLP: reset schedule because " << *BundleMember
+ << " was already scheduled\n");
+ ReSchedule = true;
+ }
+ assert(BundleMember->isSchedulingEntity() &&
+ "bundle member already part of other bundle");
+ if (PrevInBundle) {
+ PrevInBundle->NextInBundle = BundleMember;
+ } else {
+ Bundle = BundleMember;
+ }
+ BundleMember->UnscheduledDepsInBundle = 0;
+ Bundle->UnscheduledDepsInBundle += BundleMember->UnscheduledDeps;
+
+ // Group the instructions to a bundle.
+ BundleMember->FirstInBundle = Bundle;
+ PrevInBundle = BundleMember;
+ }
+ if (ScheduleEnd != OldScheduleEnd) {
+ // The scheduling region got new instructions at the lower end (or it is a
+ // new region for the first bundle). This makes it necessary to
+ // recalculate all dependencies.
+ // It is seldom that this needs to be done a second time after adding the
+ // initial bundle to the region.
+ for (auto *I = ScheduleStart; I != ScheduleEnd; I = I->getNextNode()) {
+ ScheduleData *SD = getScheduleData(I);
+ SD->clearDependencies();
+ }
+ ReSchedule = true;
+ }
+ if (ReSchedule) {
+ resetSchedule();
+ initialFillReadyList(ReadyInsts);
+ }
+
+ DEBUG(dbgs() << "SLP: try schedule bundle " << *Bundle << " in block "
+ << BB->getName() << "\n");
+
+ calculateDependencies(Bundle, true, SLP);
+
+ // Now try to schedule the new bundle. As soon as the bundle is "ready" it
+ // means that there are no cyclic dependencies and we can schedule it.
+ // Note that's important that we don't "schedule" the bundle yet (see
+ // cancelScheduling).
+ while (!Bundle->isReady() && !ReadyInsts.empty()) {
+
+ ScheduleData *pickedSD = ReadyInsts.back();
+ ReadyInsts.pop_back();
+
+ if (pickedSD->isSchedulingEntity() && pickedSD->isReady()) {
+ schedule(pickedSD, ReadyInsts);
+ }
+ }
+ return Bundle->isReady();
+}
+
+void BoUpSLP::BlockScheduling::cancelScheduling(ArrayRef<Value *> VL) {
+ if (isa<PHINode>(VL[0]))
+ return;
+
+ ScheduleData *Bundle = getScheduleData(VL[0]);
+ DEBUG(dbgs() << "SLP: cancel scheduling of " << *Bundle << "\n");
+ assert(!Bundle->IsScheduled &&
+ "Can't cancel bundle which is already scheduled");
+ assert(Bundle->isSchedulingEntity() && Bundle->isPartOfBundle() &&
+ "tried to unbundle something which is not a bundle");
+
+ // Un-bundle: make single instructions out of the bundle.
+ ScheduleData *BundleMember = Bundle;
+ while (BundleMember) {
+ assert(BundleMember->FirstInBundle == Bundle && "corrupt bundle links");
+ BundleMember->FirstInBundle = BundleMember;
+ ScheduleData *Next = BundleMember->NextInBundle;
+ BundleMember->NextInBundle = nullptr;
+ BundleMember->UnscheduledDepsInBundle = BundleMember->UnscheduledDeps;
+ if (BundleMember->UnscheduledDepsInBundle == 0) {
+ ReadyInsts.insert(BundleMember);
+ }
+ BundleMember = Next;
+ }
+}
+
+void BoUpSLP::BlockScheduling::extendSchedulingRegion(Value *V) {
+ if (getScheduleData(V))
+ return;
+ Instruction *I = dyn_cast<Instruction>(V);
+ assert(I && "bundle member must be an instruction");
+ assert(!isa<PHINode>(I) && "phi nodes don't need to be scheduled");
+ if (!ScheduleStart) {
+ // It's the first instruction in the new region.
+ initScheduleData(I, I->getNextNode(), nullptr, nullptr);
+ ScheduleStart = I;
+ ScheduleEnd = I->getNextNode();
+ assert(ScheduleEnd && "tried to vectorize a TerminatorInst?");
+ DEBUG(dbgs() << "SLP: initialize schedule region to " << *I << "\n");
+ return;
+ }
+ // Search up and down at the same time, because we don't know if the new
+ // instruction is above or below the existing scheduling region.
+ BasicBlock::reverse_iterator UpIter(ScheduleStart);
+ BasicBlock::reverse_iterator UpperEnd = BB->rend();
+ BasicBlock::iterator DownIter(ScheduleEnd);
+ BasicBlock::iterator LowerEnd = BB->end();
+ for (;;) {
+ if (UpIter != UpperEnd) {
+ if (&*UpIter == I) {
+ initScheduleData(I, ScheduleStart, nullptr, FirstLoadStoreInRegion);
+ ScheduleStart = I;
+ DEBUG(dbgs() << "SLP: extend schedule region start to " << *I << "\n");
+ return;
+ }
+ UpIter++;
+ }
+ if (DownIter != LowerEnd) {
+ if (&*DownIter == I) {
+ initScheduleData(ScheduleEnd, I->getNextNode(), LastLoadStoreInRegion,
+ nullptr);
+ ScheduleEnd = I->getNextNode();
+ assert(ScheduleEnd && "tried to vectorize a TerminatorInst?");
+ DEBUG(dbgs() << "SLP: extend schedule region end to " << *I << "\n");
+ return;
+ }
+ DownIter++;
+ }
+ assert((UpIter != UpperEnd || DownIter != LowerEnd) &&
+ "instruction not found in block");
+ }
+}
+
+void BoUpSLP::BlockScheduling::initScheduleData(Instruction *FromI,
+ Instruction *ToI,
+ ScheduleData *PrevLoadStore,
+ ScheduleData *NextLoadStore) {
+ ScheduleData *CurrentLoadStore = PrevLoadStore;
+ for (Instruction *I = FromI; I != ToI; I = I->getNextNode()) {
+ ScheduleData *SD = ScheduleDataMap[I];
+ if (!SD) {
+ // Allocate a new ScheduleData for the instruction.
+ if (ChunkPos >= ChunkSize) {
+ ScheduleDataChunks.push_back(
+ llvm::make_unique<ScheduleData[]>(ChunkSize));
+ ChunkPos = 0;
+ }
+ SD = &(ScheduleDataChunks.back()[ChunkPos++]);
+ ScheduleDataMap[I] = SD;
+ SD->Inst = I;
+ }
+ assert(!isInSchedulingRegion(SD) &&
+ "new ScheduleData already in scheduling region");
+ SD->init(SchedulingRegionID);
+
+ if (I->mayReadOrWriteMemory()) {
+ // Update the linked list of memory accessing instructions.
+ if (CurrentLoadStore) {
+ CurrentLoadStore->NextLoadStore = SD;
+ } else {
+ FirstLoadStoreInRegion = SD;
+ }
+ CurrentLoadStore = SD;
+ }
+ }
+ if (NextLoadStore) {
+ if (CurrentLoadStore)
+ CurrentLoadStore->NextLoadStore = NextLoadStore;
+ } else {
+ LastLoadStoreInRegion = CurrentLoadStore;
+ }
+}
+
+void BoUpSLP::BlockScheduling::calculateDependencies(ScheduleData *SD,
+ bool InsertInReadyList,
+ BoUpSLP *SLP) {
+ assert(SD->isSchedulingEntity());
+
+ SmallVector<ScheduleData *, 10> WorkList;
+ WorkList.push_back(SD);
+
+ while (!WorkList.empty()) {
+ ScheduleData *SD = WorkList.back();
+ WorkList.pop_back();
+
+ ScheduleData *BundleMember = SD;
+ while (BundleMember) {
+ assert(isInSchedulingRegion(BundleMember));
+ if (!BundleMember->hasValidDependencies()) {
+
+ DEBUG(dbgs() << "SLP: update deps of " << *BundleMember << "\n");
+ BundleMember->Dependencies = 0;
+ BundleMember->resetUnscheduledDeps();
+
+ // Handle def-use chain dependencies.
+ for (User *U : BundleMember->Inst->users()) {
+ if (isa<Instruction>(U)) {
+ ScheduleData *UseSD = getScheduleData(U);
+ if (UseSD && isInSchedulingRegion(UseSD->FirstInBundle)) {
+ BundleMember->Dependencies++;
+ ScheduleData *DestBundle = UseSD->FirstInBundle;
+ if (!DestBundle->IsScheduled) {
+ BundleMember->incrementUnscheduledDeps(1);
+ }
+ if (!DestBundle->hasValidDependencies()) {
+ WorkList.push_back(DestBundle);
+ }
+ }
+ } else {
+ // I'm not sure if this can ever happen. But we need to be safe.
+ // This lets the instruction/bundle never be scheduled and eventally
+ // disable vectorization.
+ BundleMember->Dependencies++;
+ BundleMember->incrementUnscheduledDeps(1);
+ }
+ }
+
+ // Handle the memory dependencies.
+ ScheduleData *DepDest = BundleMember->NextLoadStore;
+ if (DepDest) {
+ Instruction *SrcInst = BundleMember->Inst;
+ AliasAnalysis::Location SrcLoc = getLocation(SrcInst, SLP->AA);
+ bool SrcMayWrite = BundleMember->Inst->mayWriteToMemory();
+
+ while (DepDest) {
+ assert(isInSchedulingRegion(DepDest));
+ if (SrcMayWrite || DepDest->Inst->mayWriteToMemory()) {
+ if (SLP->isAliased(SrcLoc, SrcInst, DepDest->Inst)) {
+ DepDest->MemoryDependencies.push_back(BundleMember);
+ BundleMember->Dependencies++;
+ ScheduleData *DestBundle = DepDest->FirstInBundle;
+ if (!DestBundle->IsScheduled) {
+ BundleMember->incrementUnscheduledDeps(1);
+ }
+ if (!DestBundle->hasValidDependencies()) {
+ WorkList.push_back(DestBundle);
+ }
+ }
+ }
+ DepDest = DepDest->NextLoadStore;
+ }
+ }
+ }
+ BundleMember = BundleMember->NextInBundle;
+ }
+ if (InsertInReadyList && SD->isReady()) {
+ ReadyInsts.push_back(SD);
+ DEBUG(dbgs() << "SLP: gets ready on update: " << *SD->Inst << "\n");
+ }
+ }
+}
+
+void BoUpSLP::BlockScheduling::resetSchedule() {
+ assert(ScheduleStart &&
+ "tried to reset schedule on block which has not been scheduled");
+ for (Instruction *I = ScheduleStart; I != ScheduleEnd; I = I->getNextNode()) {
+ ScheduleData *SD = getScheduleData(I);
+ assert(isInSchedulingRegion(SD));
+ SD->IsScheduled = false;
+ SD->resetUnscheduledDeps();
+ }
+ ReadyInsts.clear();
+}
+
+void BoUpSLP::scheduleBlock(BlockScheduling *BS) {
+
+ if (!BS->ScheduleStart)
+ return;
+
+ DEBUG(dbgs() << "SLP: schedule block " << BS->BB->getName() << "\n");
+
+ BS->resetSchedule();
+
+ // For the real scheduling we use a more sophisticated ready-list: it is
+ // sorted by the original instruction location. This lets the final schedule
+ // be as close as possible to the original instruction order.
+ struct ScheduleDataCompare {
+ bool operator()(ScheduleData *SD1, ScheduleData *SD2) {
+ return SD2->SchedulingPriority < SD1->SchedulingPriority;
+ }
+ };
+ std::set<ScheduleData *, ScheduleDataCompare> ReadyInsts;
+
+ // Ensure that all depencency data is updated and fill the ready-list with
+ // initial instructions.
+ int Idx = 0;
+ int NumToSchedule = 0;
+ for (auto *I = BS->ScheduleStart; I != BS->ScheduleEnd;
+ I = I->getNextNode()) {
+ ScheduleData *SD = BS->getScheduleData(I);
+ assert(
+ SD->isPartOfBundle() == (ScalarToTreeEntry.count(SD->Inst) != 0) &&
+ "scheduler and vectorizer have different opinion on what is a bundle");
+ SD->FirstInBundle->SchedulingPriority = Idx++;
+ if (SD->isSchedulingEntity()) {
+ BS->calculateDependencies(SD, false, this);
+ NumToSchedule++;
+ }
+ }
+ BS->initialFillReadyList(ReadyInsts);
+
+ Instruction *LastScheduledInst = BS->ScheduleEnd;
+
+ // Do the "real" scheduling.
+ while (!ReadyInsts.empty()) {
+ ScheduleData *picked = *ReadyInsts.begin();
+ ReadyInsts.erase(ReadyInsts.begin());
+
+ // Move the scheduled instruction(s) to their dedicated places, if not
+ // there yet.
+ ScheduleData *BundleMember = picked;
+ while (BundleMember) {
+ Instruction *pickedInst = BundleMember->Inst;
+ if (LastScheduledInst->getNextNode() != pickedInst) {
+ BS->BB->getInstList().remove(pickedInst);
+ BS->BB->getInstList().insert(LastScheduledInst, pickedInst);
+ }
+ LastScheduledInst = pickedInst;
+ BundleMember = BundleMember->NextInBundle;
+ }
+
+ BS->schedule(picked, ReadyInsts);
+ NumToSchedule--;
+ }
+ assert(NumToSchedule == 0 && "could not schedule all instructions");
+
+ // Avoid duplicate scheduling of the block.
+ BS->ScheduleStart = nullptr;
+}
+
/// The SLPVectorizer Pass.
struct SLPVectorizer : public FunctionPass {
typedef SmallVector<StoreInst *, 8> StoreList;
AliasAnalysis *AA;
LoopInfo *LI;
DominatorTree *DT;
+ AssumptionCache *AC;
bool runOnFunction(Function &F) override {
if (skipOptnoneFunction(F))
AA = &getAnalysis<AliasAnalysis>();
LI = &getAnalysis<LoopInfo>();
DT = &getAnalysis<DominatorTreeWrapperPass>().getDomTree();
+ AC = &getAnalysis<AssumptionCacheTracker>().getAssumptionCache(F);
StoreRefs.clear();
bool Changed = false;
// Use the bottom up slp vectorizer to construct chains that start with
// store instructions.
- BoUpSLP R(&F, SE, DL, TTI, TLI, AA, LI, DT);
+ BoUpSLP R(&F, SE, DL, TTI, TLI, AA, LI, DT, AC);
// Scan the blocks in the function in post order.
for (po_iterator<BasicBlock*> it = po_begin(&F.getEntryBlock()),
void getAnalysisUsage(AnalysisUsage &AU) const override {
FunctionPass::getAnalysisUsage(AU);
+ AU.addRequired<AssumptionCacheTracker>();
AU.addRequired<ScalarEvolution>();
AU.addRequired<AliasAnalysis>();
AU.addRequired<TargetTransformInfo>();
/// scheduling and that don't need extracting.
/// \returns true if a value was vectorized.
bool tryToVectorizeList(ArrayRef<Value *> VL, BoUpSLP &R,
- ArrayRef<Value *> BuildVector = None);
+ ArrayRef<Value *> BuildVector = None,
+ bool allowReorder = false);
/// \brief Try to vectorize a chain that may start at the operands of \V;
bool tryToVectorize(BinaryOperator *V, BoUpSLP &R);
if (!A || !B)
return false;
Value *VL[] = { A, B };
- return tryToVectorizeList(VL, R);
+ return tryToVectorizeList(VL, R, None, true);
}
bool SLPVectorizer::tryToVectorizeList(ArrayRef<Value *> VL, BoUpSLP &R,
- ArrayRef<Value *> BuildVector) {
+ ArrayRef<Value *> BuildVector,
+ bool allowReorder) {
if (VL.size() < 2)
return false;
BuildVectorSlice = BuildVector.slice(i, OpsWidth);
R.buildTree(Ops, BuildVectorSlice);
+ // TODO: check if we can allow reordering also for other cases than
+ // tryToVectorizePair()
+ if (allowReorder && R.shouldReorder()) {
+ assert(Ops.size() == 2);
+ assert(BuildVectorSlice.empty());
+ Value *ReorderedOps[] = { Ops[1], Ops[0] };
+ R.buildTree(ReorderedOps, None);
+ }
int Cost = R.getTreeCost();
if (Cost < -SLPCostThreshold) {
BinaryOperator *B0 = dyn_cast<BinaryOperator>(B->getOperand(0));
BinaryOperator *B1 = dyn_cast<BinaryOperator>(B->getOperand(1));
if (tryToVectorizePair(A, B0, R)) {
- B->moveBefore(V);
return true;
}
if (tryToVectorizePair(A, B1, R)) {
- B->moveBefore(V);
return true;
}
}
BinaryOperator *A0 = dyn_cast<BinaryOperator>(A->getOperand(0));
BinaryOperator *A1 = dyn_cast<BinaryOperator>(A->getOperand(1));
if (tryToVectorizePair(A0, B, R)) {
- A->moveBefore(V);
return true;
}
if (tryToVectorizePair(A1, B, R)) {
- A->moveBefore(V);
return true;
}
}
unsigned i = 0;
for (; i < NumReducedVals - ReduxWidth + 1; i += ReduxWidth) {
- ArrayRef<Value *> ValsToReduce(&ReducedVals[i], ReduxWidth);
- V.buildTree(ValsToReduce, ReductionOps);
+ V.buildTree(makeArrayRef(&ReducedVals[i], ReduxWidth), ReductionOps);
// Estimate cost.
int Cost = V.getTreeCost() + getReductionCost(TTI, ReducedVals[i]);
/// \brief Emit a horizontal reduction of the vectorized value.
Value *emitReduction(Value *VectorizedValue, IRBuilder<> &Builder) {
assert(VectorizedValue && "Need to have a vectorized tree node");
- Instruction *ValToReduce = dyn_cast<Instruction>(VectorizedValue);
assert(isPowerOf2_32(ReduxWidth) &&
"We only handle power-of-two reductions for now");
- Value *TmpVec = ValToReduce;
+ Value *TmpVec = VectorizedValue;
for (unsigned i = ReduxWidth / 2; i != 0; i >>= 1) {
if (IsPairwiseReduction) {
Value *LeftMask =
// Try to vectorize them.
unsigned NumElts = (SameTypeIt - IncIt);
DEBUG(errs() << "SLP: Trying to vectorize starting at PHIs (" << NumElts << ")\n");
- if (NumElts > 1 &&
- tryToVectorizeList(ArrayRef<Value *>(IncIt, NumElts), R)) {
+ if (NumElts > 1 && tryToVectorizeList(makeArrayRef(IncIt, NumElts), R)) {
// Success start over because instructions might have been changed.
HaveVectorizedPhiNodes = true;
Changed = true;
for (BasicBlock::iterator it = BB->begin(), e = BB->end(); it != e; it++) {
// We may go through BB multiple times so skip the one we have checked.
- if (!VisitedInstrs.insert(it))
+ if (!VisitedInstrs.insert(it).second)
continue;
if (isa<DbgInfoIntrinsic>(it))
}
}
+ // Try to vectorize horizontal reductions feeding into a return.
+ if (ReturnInst *RI = dyn_cast<ReturnInst>(it))
+ if (RI->getNumOperands() != 0)
+ if (BinaryOperator *BinOp =
+ dyn_cast<BinaryOperator>(RI->getOperand(0))) {
+ DEBUG(dbgs() << "SLP: Found a return to vectorize.\n");
+ if (tryToVectorizePair(BinOp->getOperand(0),
+ BinOp->getOperand(1), R)) {
+ Changed = true;
+ it = BB->begin();
+ e = BB->end();
+ continue;
+ }
+ }
+
// Try to vectorize trees that start at compare instructions.
if (CmpInst *CI = dyn_cast<CmpInst>(it)) {
if (tryToVectorizePair(CI->getOperand(0), CI->getOperand(1), R)) {
}
for (int i = 0; i < 2; ++i) {
- if (BinaryOperator *BI = dyn_cast<BinaryOperator>(CI->getOperand(i))) {
- if (tryToVectorizePair(BI->getOperand(0), BI->getOperand(1), R)) {
- Changed = true;
- // We would like to start over since some instructions are deleted
- // and the iterator may become invalid value.
- it = BB->begin();
- e = BB->end();
- }
- }
+ if (BinaryOperator *BI = dyn_cast<BinaryOperator>(CI->getOperand(i))) {
+ if (tryToVectorizePair(BI->getOperand(0), BI->getOperand(1), R)) {
+ Changed = true;
+ // We would like to start over since some instructions are deleted
+ // and the iterator may become invalid value.
+ it = BB->begin();
+ e = BB->end();
+ }
+ }
}
continue;
}
// Process the stores in chunks of 16.
for (unsigned CI = 0, CE = it->second.size(); CI < CE; CI+=16) {
unsigned Len = std::min<unsigned>(CE - CI, 16);
- ArrayRef<StoreInst *> Chunk(&it->second[CI], Len);
- Changed |= vectorizeStores(Chunk, -SLPCostThreshold, R);
+ Changed |= vectorizeStores(makeArrayRef(&it->second[CI], Len),
+ -SLPCostThreshold, R);
}
}
return Changed;
INITIALIZE_PASS_BEGIN(SLPVectorizer, SV_NAME, lv_name, false, false)
INITIALIZE_AG_DEPENDENCY(AliasAnalysis)
INITIALIZE_AG_DEPENDENCY(TargetTransformInfo)
+INITIALIZE_PASS_DEPENDENCY(AssumptionCacheTracker)
INITIALIZE_PASS_DEPENDENCY(ScalarEvolution)
INITIALIZE_PASS_DEPENDENCY(LoopSimplify)
INITIALIZE_PASS_END(SLPVectorizer, SV_NAME, lv_name, false, false)
projects / oota-llvm.git / blobdiff