llvm::VPlanTransforms Struct Reference

#include "Transforms/Vectorize/VPlanTransforms.h"

Static Public Member Functions
static void	VPInstructionsToVPRecipes (Loop *OrigLoop, VPlanPtr &Plan, function_ref< const InductionDescriptor *(PHINode *)> GetIntOrFpInductionDescriptor, SmallPtrSetImpl< Instruction * > &DeadInstructions, ScalarEvolution &SE)
	Replaces the VPInstructions in Plan with corresponding widen recipes. More...
static bool	sinkScalarOperands (VPlan &Plan)
static bool	mergeReplicateRegions (VPlan &Plan)
static void	removeRedundantInductionCasts (VPlan &Plan)
	Remove redundant casts of inductions. More...
static void	removeRedundantCanonicalIVs (VPlan &Plan)
	Try to replace VPWidenCanonicalIVRecipes with a widened canonical IV recipe, if it exists. More...
static void	removeDeadRecipes (VPlan &Plan, Loop &OrigLoop)
	Try to remove dead recipes. More...
static void	optimizeInductions (VPlan &Plan, ScalarEvolution &SE)
	If any user of a VPWidenIntOrFpInductionRecipe needs scalar values, provide them by building scalar steps off of the canonical scalar IV and update the original IV's users. More...
static void	removeRedundantExpandSCEVRecipes (VPlan &Plan)
	Remove redundant EpxandSCEVRecipes in Plan's entry block by replacing them with already existing recipes expanding the same SCEV expression. More...

Detailed Description

Definition at line 27 of file VPlanTransforms.h.

Member Function Documentation

mergeReplicateRegions()

bool VPlanTransforms::mergeReplicateRegions ( VPlan &  Plan )

static

Definition at line 217 of file VPlanTransforms.cpp.

References assert(), llvm::VPBlockUtils::connectBlocks(), llvm::SetVector< T, Vector, Set >::contains(), llvm::depth_first(), llvm::VPBlockUtils::disconnectBlocks(), E, llvm::VPlan::getEntry(), llvm::VPBasicBlock::getFirstNonPhi(), getPredicatedMask(), getPredicatedThenBlock(), llvm::VPBlockBase::getSingleSuccessor(), I, llvm::SetVector< T, Vector, Set >::insert(), llvm::make_early_inc_range(), llvm::reverse(), Users, and llvm::VPValue::users().

optimizeInductions()

void VPlanTransforms::optimizeInductions ( VPlan &  Plan, ScalarEvolution &  SE  )

static

If any user of a VPWidenIntOrFpInductionRecipe needs scalar values, provide them by building scalar steps off of the canonical scalar IV and update the original IV's users.

This is an optional optimization to reduce the needs of vector extracts.

Definition at line 415 of file VPlanTransforms.cpp.

References E, llvm::VPlan::getCanonicalIV(), llvm::VPBlockBase::getEntryBasicBlock(), llvm::VPBasicBlock::getFirstNonPhi(), llvm::vputils::getOrCreateVPValueForSCEVExpr(), llvm::Value::getType(), llvm::VPlan::getVectorLoopRegion(), I, llvm::VPBasicBlock::insert(), IV, llvm::VPBasicBlock::phis(), ToRemove, and Users.

removeDeadRecipes()

void VPlanTransforms::removeDeadRecipes ( VPlan &  Plan, Loop &  OrigLoop  )

static

Try to remove dead recipes.

At the moment, only dead header recipes are removed.

Definition at line 387 of file VPlanTransforms.cpp.

References llvm::any_of(), llvm::VPBlockBase::getEntryBasicBlock(), llvm::VPlan::getVectorLoopRegion(), hasOutsideUser(), llvm::make_early_inc_range(), and llvm::reverse().

removeRedundantCanonicalIVs()

void VPlanTransforms::removeRedundantCanonicalIVs ( VPlan &  Plan )

static

Try to replace VPWidenCanonicalIVRecipes with a widened canonical IV recipe, if it exists.

Definition at line 333 of file VPlanTransforms.cpp.

References llvm::VPRecipeBase::eraseFromParent(), llvm::VPlan::getCanonicalIV(), llvm::VPBlockBase::getEntryBasicBlock(), llvm::VPWidenCanonicalIVRecipe::getScalarType(), llvm::VPlan::getVectorLoopRegion(), llvm::vputils::onlyFirstLaneUsed(), llvm::VPBasicBlock::phis(), llvm::VPValue::replaceAllUsesWith(), and llvm::VPValue::users().

removeRedundantExpandSCEVRecipes()

void VPlanTransforms::removeRedundantExpandSCEVRecipes ( VPlan &  Plan )

static

Remove redundant EpxandSCEVRecipes in Plan's entry block by replacing them with already existing recipes expanding the same SCEV expression.

Definition at line 455 of file VPlanTransforms.cpp.

References llvm::VPlan::getEntry(), llvm::VPBlockBase::getEntryBasicBlock(), I, llvm::DenseMapBase< DenseMap< KeyT, ValueT, DenseMapInfo< KeyT >, llvm::detail::DenseMapPair< KeyT, ValueT > >, KeyT, ValueT, DenseMapInfo< KeyT >, llvm::detail::DenseMapPair< KeyT, ValueT > >::insert(), and llvm::make_early_inc_range().

removeRedundantInductionCasts()

void VPlanTransforms::removeRedundantInductionCasts ( VPlan &  Plan )

static

Remove redundant casts of inductions.

Such redundant casts are casts of induction variables that can be ignored, because we already proved that the casted phi is equal to the uncasted phi in the vectorized loop. There is no need to vectorize the cast - the same value can be used for both the phi and casts in the vector loop.

Definition at line 301 of file VPlanTransforms.cpp.

References llvm::VPBlockBase::getEntryBasicBlock(), llvm::VPlan::getVectorLoopRegion(), llvm::VPDef::getVPSingleValue(), IV, llvm::VPBasicBlock::phis(), llvm::VPValue::replaceAllUsesWith(), llvm::reverse(), and llvm::VPValue::users().

sinkScalarOperands()

bool VPlanTransforms::sinkScalarOperands ( VPlan &  Plan )

static

Definition at line 106 of file VPlanTransforms.cpp.

References llvm::all_of(), llvm::depth_first(), llvm::SetVector< T, Vector, Set >::empty(), llvm::VPlan::getEntry(), llvm::VPBasicBlock::getFirstNonPhi(), I, llvm::SetVector< T, Vector, Set >::insert(), llvm::SetVector< T, Vector, Set >::pop_back_val(), and Users.

VPInstructionsToVPRecipes()

void VPlanTransforms::VPInstructionsToVPRecipes ( Loop *  OrigLoop, VPlanPtr &  Plan, function_ref< const InductionDescriptor *(PHINode *)>  GetIntOrFpInductionDescriptor, SmallPtrSetImpl< Instruction * > &  DeadInstructions, ScalarEvolution &  SE  )

static

Replaces the VPInstructions in Plan with corresponding widen recipes.

Definition at line 21 of file VPlanTransforms.cpp.

References assert(), llvm::sampleprof::Base, llvm::SmallPtrSetImpl< PtrType >::count(), llvm::tgtok::Def, llvm::VPDef::definedValues(), GEP, llvm::getLoadStorePointerOperand(), llvm::VPDef::getNumDefinedValues(), llvm::vputils::getOrCreateVPValueForSCEVExpr(), llvm::ScalarEvolution::getSCEV(), llvm::VPValue::getUnderlyingValue(), llvm::VPDef::getVPSingleValue(), llvm::VPRecipeBase::insertBefore(), llvm::ScalarEvolution::isLoopInvariant(), llvm::SPII::Load, llvm::make_early_inc_range(), llvm::User::operands(), llvm::VPValue::replaceAllUsesWith(), SI, and llvm::SPII::Store.

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The documentation for this struct was generated from the following files:

• lib/Transforms/Vectorize/VPlanTransforms.h
• lib/Transforms/Vectorize/VPlanTransforms.cpp