#include "llvm/Analysis/ScalarEvolutionExpander.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/Support/Debug.h"

Include dependency graph for ScalarEvolutionExpander.cpp:

Namespaces
	llvm
	List of target independent CodeGen pass IDs.

Functions
static bool	FactorOutConstant (const SCEV &S, const SCEV &Remainder, const SCEV Factor, ScalarEvolution &SE, const DataLayout TD)

static void	SimplifyAddOperands (SmallVectorImpl< const SCEV * > &Ops, Type *Ty, ScalarEvolution &SE)

static void	SplitAddRecs (SmallVectorImpl< const SCEV * > &Ops, Type *Ty, ScalarEvolution &SE)

static const Loop *	PickMostRelevantLoop (const Loop A, const Loop B, DominatorTree &DT)

static void	ExposePointerBase (const SCEV &Base, const SCEV &Rest, ScalarEvolution &SE)

static bool	width_descending (Value lhs, Value rhs)
	Sort values by integer width for replaceCongruentIVs. More...

bool	llvm::isSafeToExpand (const SCEV *S, ScalarEvolution &SE)

Function Documentation

static void ExposePointerBase	(	const SCEV *&	Base,
		const SCEV *&	Rest,
		ScalarEvolution &	SE
	)

static

Move parts of Base into Rest to leave Base with the minimal expression that provides a pointer operand suitable for a GEP expansion.

Definition at line 834 of file ScalarEvolutionExpander.cpp.

References llvm::ARM_PROC::A, llvm::SmallVectorTemplateCommon< T, typename >::back(), llvm::SCEV::FlagNW, llvm::ScalarEvolution::getAddExpr(), llvm::ScalarEvolution::getAddRecExpr(), and llvm::ScalarEvolution::getConstant().

static bool FactorOutConstant	(	const SCEV *&	S,
		const SCEV *&	Remainder,
		const SCEV *	Factor,
		ScalarEvolution &	SE,
		const DataLayout *	TD
	)

static

FactorOutConstant - Test if S is divisible by Factor, using signed division. If so, update S with Factor divided out and return true. S need not be evenly divisible if a reasonable remainder can be computed. TODO: When ScalarEvolution gets a SCEVSDivExpr, this can be made unnecessary; in its place, just signed-divide Ops[i] by the scale and check to see if the divide was folded.

Definition at line 208 of file ScalarEvolutionExpander.cpp.

References llvm::ARM_PROC::A, llvm::CallingConv::C, R600_InstFlag::FC, llvm::SCEV::FlagNW, llvm::ConstantInt::get(), llvm::ScalarEvolution::getAddExpr(), llvm::ScalarEvolution::getAddRecExpr(), llvm::ScalarEvolution::getConstant(), llvm::ScalarEvolution::getContext(), llvm::ScalarEvolution::getMulExpr(), llvm::SCEV::getType(), llvm::SCEVConstant::getValue(), llvm::ConstantInt::getValue(), llvm::SCEV::isOne(), llvm::SCEV::isZero(), and llvm::ConstantInt::isZero().

static const Loop* PickMostRelevantLoop	(	const Loop *	A,
		const Loop *	B,
		DominatorTree &	DT
	)

static

PickMostRelevantLoop - Given two loops pick the one that's most relevant for SCEV expansion. If they are nested, this is the most nested. If they are neighboring, pick the later.

Definition at line 616 of file ScalarEvolutionExpander.cpp.

References llvm::ARM_PROC::A, llvm::LoopBase< N, M >::contains(), llvm::DominatorTree::dominates(), and llvm::LoopBase< N, M >::getHeader().

static void SimplifyAddOperands	(	SmallVectorImpl< const SCEV * > &	Ops,
		Type *	Ty,
		ScalarEvolution &	SE
	)

static

SimplifyAddOperands - Sort and simplify a list of add operands. NumAddRecs is the number of SCEVAddRecExprs present, which are kept at the end of the list.

Definition at line 306 of file ScalarEvolutionExpander.cpp.

References llvm::SmallVectorImpl< T >::append(), llvm::SmallVectorTemplateCommon< T >::begin(), llvm::SmallVectorImpl< T >::clear(), llvm::SmallVectorTemplateCommon< T >::end(), llvm::ScalarEvolution::getAddExpr(), llvm::ScalarEvolution::getConstant(), llvm::SmallVectorTemplateBase< T, isPodLike< T >::value >::push_back(), and llvm::SmallVectorTemplateCommon< T >::size().

Referenced by SplitAddRecs().

static void SplitAddRecs	(	SmallVectorImpl< const SCEV * > &	Ops,
		Type *	Ty,
		ScalarEvolution &	SE
	)

static

SplitAddRecs - Flatten a list of add operands, moving addrec start values out to the top level. For example, convert {a + b,+,c} to a, b, {0,+,d}. This helps expose more opportunities for folding parts of the expressions into GEP indices.

Definition at line 335 of file ScalarEvolutionExpander.cpp.

References llvm::ARM_PROC::A, llvm::SmallVectorImpl< T >::append(), llvm::SmallVectorTemplateCommon< T >::begin(), llvm::SmallVectorBase::empty(), llvm::SmallVectorTemplateCommon< T >::end(), llvm::SCEV::FlagNW, llvm::ScalarEvolution::getAddRecExpr(), llvm::ScalarEvolution::getConstant(), llvm::SCEV::isZero(), llvm::SmallVectorTemplateBase< T, isPodLike< T >::value >::push_back(), SimplifyAddOperands(), and llvm::SmallVectorTemplateCommon< T >::size().

static bool width_descending	(	Value *	lhs,
		Value *	rhs
	)

static

Sort values by integer width for replaceCongruentIVs.

Definition at line 1566 of file ScalarEvolutionExpander.cpp.

References llvm::Type::getPrimitiveSizeInBits(), llvm::Value::getType(), and llvm::Type::isIntegerTy().

Referenced by llvm::SCEVExpander::replaceCongruentIVs().

Namespaces

Functions

Function Documentation