InferAlignment.cpp File Reference

#include "llvm/Transforms/Scalar/InferAlignment.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/STLFunctionalExtras.h"
#include "llvm/ADT/ScopedHashTable.h"
#include "llvm/Analysis/AssumptionCache.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/PatternMatch.h"
#include "llvm/Support/KnownBits.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Transforms/Utils/Local.h"

Go to the source code of this file.

Classes
struct	AlignmentScope

Typedefs
using	ScopedHT

Functions
static bool	tryToImproveAlign (const DataLayout &DL, Instruction *I, function_ref< Align(Value *PtrOp, Align OldAlign, Align PrefAlign)> Fn)
bool	inferAlignment (Function &F, AssumptionCache &AC, DominatorTree &DT)

Typedef Documentation

ScopedHT

using ScopedHT

Initial value:

 
    ScopedHashTable<Value *, Align, DenseMapInfo<Value *>, BumpPtrAllocator>

Definition at line 97 of file InferAlignment.cpp.

Function Documentation

inferAlignment()

bool inferAlignment	(	Function &	F,
		AssumptionCache &	AC,
		DominatorTree &	DT )

Definition at line 110 of file InferAlignment.cpp.

References AlignmentScope::BB, Changed, llvm::commonAlignment(), llvm::computeKnownBits(), llvm::KnownBits::countMinTrailingZeros(), DL, AlignmentScope::End, F, llvm::KnownBits::getBitWidth(), llvm::APInt::getLimitedValue(), llvm::DominatorTreeBase< NodeT, IsPostDom >::getRootNode(), llvm::Value::getType(), I, llvm::ScopedHashTable< K, V, KInfo, AllocatorTy >::insert(), AlignmentScope::Iter, llvm::ScopedHashTable< K, V, KInfo, AllocatorTy >::lookup(), llvm::Value::MaxAlignmentExponent, llvm::Value::stripAndAccumulateConstantOffsets(), llvm::tryEnforceAlignment(), and tryToImproveAlign().

Referenced by llvm::InferAlignmentPass::run().

tryToImproveAlign()

bool tryToImproveAlign ( const DataLayout & DL, Instruction * I, function_ref< Align(Value *PtrOp, Align OldAlign, Align PrefAlign)> Fn )

static

Definition at line 31 of file InferAlignment.cpp.

References DL, llvm::dyn_cast(), llvm::APInt::getBitsSetFrom(), llvm::getLoadStoreAlignment(), llvm::getLoadStorePointerOperand(), llvm::getLoadStoreType(), llvm::Constant::getNullValue(), llvm::Attribute::getWithAlignment(), I, II, llvm::Log2(), llvm::PatternMatch::m_And(), llvm::PatternMatch::m_APInt(), llvm::PatternMatch::m_PtrToIntOrAddr(), llvm::PatternMatch::m_Trunc(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), llvm::setLoadStoreAlignment(), and llvm::Align::value().

Referenced by inferAlignment().