UnrollLoop.h Source File (original) (raw)

15#ifndef LLVM_TRANSFORMS_UTILS_UNROLLLOOP_H

16#define LLVM_TRANSFORMS_UTILS_UNROLLLOOP_H

23namespace llvm {

25class AssumptionCache;

26class AAResults;

28class BlockFrequencyInfo;

29class DependenceInfo;

30class DominatorTree;

31class Loop;

32class LoopInfo;

33class MDNode;

34class ProfileSummaryInfo;

35class OptimizationRemarkEmitter;

36class ScalarEvolution;

37class StringRef;

46 "llvm.loop.unroll.followup_unrolled";

48 "llvm.loop.unroll.followup_remainder";

68};

79};

86 Loop **RemainderLoop = nullptr,

90 Loop *L, unsigned Count, bool AllowExpensiveTripCount,

91 bool UseEpilogRemainder, bool UnrollRemainder, bool ForgetAllSCEV,

94 unsigned SCEVExpansionBudget, Loop **ResultLoop = nullptr);

97 unsigned TripMultiple, bool UnrollRemainder,

102 Loop **EpilogueLoop = nullptr);

103

106

112

114

119 std::optional UserThreshold, std::optional UserCount,

120 std::optional UserAllowPartial, std::optional UserRuntime,

121 std::optional UserUpperBound,

122 std::optional UserFullUnrollMaxCount);

123

124

125

126

127

130 bool NotDuplicatable;

131

132public:

136

139 unsigned BEInsns);

140

141

143

145

146

147

150 unsigned CountOverwrite = 0) const;

151};

152

154 DominatorTree &DT, LoopInfo *LI, AssumptionCache *AC,

155 ScalarEvolution &SE,

156 const SmallPtrSetImpl<const Value *> &EphValues,

157 OptimizationRemarkEmitter *ORE, unsigned TripCount,

158 unsigned MaxTripCount, bool MaxOrZero,

159 unsigned TripMultiple, const UnrollCostEstimator &UCE,

160 TargetTransformInfo::UnrollingPreferences &UP,

161 TargetTransformInfo::PeelingPreferences &PP,

162 bool &UseUpperBound);

163

164}

165

166#endif

This file defines the DenseMap class.

This file defines an InstructionCost class that is used when calculating the cost of an instruction,...

This pass exposes codegen information to IR-level passes.

A cache of @llvm.assume calls within a function.

LLVM Basic Block Representation.

BlockFrequencyInfo pass uses BlockFrequencyInfoImpl implementation to estimate IR basic block frequen...

DependenceInfo - This class is the main dependence-analysis driver.

Concrete subclass of DominatorTreeBase that is used to compute a normal dominator tree.

std::optional< CostType > getValue() const

This function is intended to be used as sparingly as possible, since the class provides the full rang...

Represents a single loop in the control flow graph.

Analysis providing profile information.

The main scalar evolution driver.

A templated base class for SmallPtrSet which provides the typesafe interface that is common across al...

StringRef - Represent a constant reference to a string, i.e.

This pass provides access to the codegen interfaces that are needed for IR-level transformations.

Produce an estimate of the unrolled cost of the specified loop.

ConvergenceKind Convergence

bool ConvergenceAllowsRuntime

uint64_t getUnrolledLoopSize(const TargetTransformInfo::UnrollingPreferences &UP, unsigned CountOverwrite=0) const

Returns loop size estimation for unrolled loop, given the unrolling configuration specified by UP.

bool canUnroll() const

Whether it is legal to unroll this loop.

unsigned NumInlineCandidates

uint64_t getRolledLoopSize() const

@ BasicBlock

Various leaf nodes.

This is an optimization pass for GlobalISel generic memory operations.

bool isSafeToUnrollAndJam(Loop *L, ScalarEvolution &SE, DominatorTree &DT, DependenceInfo &DI, LoopInfo &LI)

void simplifyLoopAfterUnroll(Loop *L, bool SimplifyIVs, LoopInfo *LI, ScalarEvolution *SE, DominatorTree *DT, AssumptionCache *AC, const TargetTransformInfo *TTI, AAResults *AA=nullptr)

Perform some cleanup and simplifications on loops after unrolling.

bool UnrollRuntimeLoopRemainder(Loop *L, unsigned Count, bool AllowExpensiveTripCount, bool UseEpilogRemainder, bool UnrollRemainder, bool ForgetAllSCEV, LoopInfo *LI, ScalarEvolution *SE, DominatorTree *DT, AssumptionCache *AC, const TargetTransformInfo *TTI, bool PreserveLCSSA, unsigned SCEVExpansionBudget, Loop **ResultLoop=nullptr)

Insert code in the prolog/epilog code when unrolling a loop with a run-time trip-count.

LoopUnrollResult

Represents the result of a UnrollLoop invocation.

@ PartiallyUnrolled

The loop was partially unrolled – we still have a loop, but with a smaller trip count.

@ Unmodified

The loop was not modified.

@ FullyUnrolled

The loop was fully unrolled into straight-line code.

bool computeUnrollCount(Loop *L, const TargetTransformInfo &TTI, DominatorTree &DT, LoopInfo *LI, AssumptionCache *AC, ScalarEvolution &SE, const SmallPtrSetImpl< const Value * > &EphValues, OptimizationRemarkEmitter *ORE, unsigned TripCount, unsigned MaxTripCount, bool MaxOrZero, unsigned TripMultiple, const UnrollCostEstimator &UCE, TargetTransformInfo::UnrollingPreferences &UP, TargetTransformInfo::PeelingPreferences &PP, bool &UseUpperBound)

const char *const LLVMLoopUnrollFollowupAll

TargetTransformInfo::UnrollingPreferences gatherUnrollingPreferences(Loop *L, ScalarEvolution &SE, const TargetTransformInfo &TTI, BlockFrequencyInfo *BFI, ProfileSummaryInfo *PSI, llvm::OptimizationRemarkEmitter &ORE, int OptLevel, std::optional< unsigned > UserThreshold, std::optional< unsigned > UserCount, std::optional< bool > UserAllowPartial, std::optional< bool > UserRuntime, std::optional< bool > UserUpperBound, std::optional< unsigned > UserFullUnrollMaxCount)

Gather the various unrolling parameters based on the defaults, compiler flags, TTI overrides and user...

const char *const LLVMLoopUnrollFollowupRemainder

const Loop * addClonedBlockToLoopInfo(BasicBlock *OriginalBB, BasicBlock *ClonedBB, LoopInfo *LI, NewLoopsMap &NewLoops)

Adds ClonedBB to LoopInfo, creates a new loop for ClonedBB if necessary and adds a mapping from the o...

const char *const LLVMLoopUnrollFollowupUnrolled

LoopUnrollResult UnrollAndJamLoop(Loop *L, unsigned Count, unsigned TripCount, unsigned TripMultiple, bool UnrollRemainder, LoopInfo *LI, ScalarEvolution *SE, DominatorTree *DT, AssumptionCache *AC, const TargetTransformInfo *TTI, OptimizationRemarkEmitter *ORE, Loop **EpilogueLoop=nullptr)

MDNode * GetUnrollMetadata(MDNode *LoopID, StringRef Name)

Given an llvm.loop loop id metadata node, returns the loop hint metadata node with the given name (fo...

LoopUnrollResult UnrollLoop(Loop *L, UnrollLoopOptions ULO, LoopInfo *LI, ScalarEvolution *SE, DominatorTree *DT, AssumptionCache *AC, const llvm::TargetTransformInfo *TTI, OptimizationRemarkEmitter *ORE, bool PreserveLCSSA, Loop **RemainderLoop=nullptr, AAResults *AA=nullptr)

Unroll the given loop by Count.

Parameters that control the generic loop unrolling transformation.

const Instruction * Heart

bool AllowExpensiveTripCount

unsigned SCEVExpansionBudget