LoopUnrollAndJam.cpp File Reference

#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/AssumptionCache.h"
#include "llvm/Analysis/DependenceAnalysis.h"
#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/Analysis/LoopAnalysisManager.h"
#include "llvm/Analysis/LoopIterator.h"
#include "llvm/Analysis/LoopPass.h"
#include "llvm/Analysis/OptimizationRemarkEmitter.h"
#include "llvm/Analysis/ScalarEvolution.h"
#include "llvm/Analysis/ScalarEvolutionExpander.h"
#include "llvm/Analysis/Utils/Local.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DebugInfoMetadata.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/Utils/BasicBlockUtils.h"
#include "llvm/Transforms/Utils/Cloning.h"
#include "llvm/Transforms/Utils/LoopSimplify.h"
#include "llvm/Transforms/Utils/LoopUtils.h"
#include "llvm/Transforms/Utils/SimplifyIndVar.h"
#include "llvm/Transforms/Utils/UnrollLoop.h"

Include dependency graph for LoopUnrollAndJam.cpp:

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "loop-unroll-and-jam"

Typedefs
typedef SmallPtrSet< BasicBlock *, 4 >	BasicBlockSet

Functions
	STATISTIC (NumUnrolledAndJammed, "Number of loops unroll and jammed")
	STATISTIC (NumCompletelyUnrolledAndJammed, "Number of loops unroll and jammed")
static bool	partitionOuterLoopBlocks (Loop *L, Loop *SubLoop, BasicBlockSet &ForeBlocks, BasicBlockSet &SubLoopBlocks, BasicBlockSet &AftBlocks, DominatorTree *DT)
template<typename T >
static bool	processHeaderPhiOperands (BasicBlock *Header, BasicBlock *Latch, BasicBlockSet &AftBlocks, T Visit)
static void	moveHeaderPhiOperandsToForeBlocks (BasicBlock *Header, BasicBlock *Latch, Instruction *InsertLoc, BasicBlockSet &AftBlocks)
static bool	getLoadsAndStores (BasicBlockSet &Blocks, SmallVector< Value *, 4 > &MemInstr)
static bool	checkDependencies (SmallVector< Value *, 4 > &Earlier, SmallVector< Value *, 4 > &Later, unsigned LoopDepth, bool InnerLoop, DependenceInfo &DI)
static bool	checkDependencies (Loop *L, BasicBlockSet &ForeBlocks, BasicBlockSet &SubLoopBlocks, BasicBlockSet &AftBlocks, DependenceInfo &DI)

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "loop-unroll-and-jam"

Definition at line 42 of file LoopUnrollAndJam.cpp.

Referenced by llvm::UnrollAndJamLoop().

Typedef Documentation

BasicBlockSet

typedef SmallPtrSet<BasicBlock *, 4> BasicBlockSet

Definition at line 47 of file LoopUnrollAndJam.cpp.

Function Documentation

checkDependencies() [1/2]

static bool checkDependencies ( SmallVector< Value *, 4 > &  Earlier, SmallVector< Value *, 4 > &  Later, unsigned  LoopDepth, bool  InnerLoop, DependenceInfo &  DI  )

static

Definition at line 609 of file LoopUnrollAndJam.cpp.

References assert(), D, llvm::dbgs(), llvm::DependenceInfo::depends(), llvm::Dependence::DVEntry::GT, I, LLVM_DEBUG, and llvm::Dependence::DVEntry::LT.

Referenced by checkDependencies(), and llvm::isSafeToUnrollAndJam().

checkDependencies() [2/2]

static bool checkDependencies ( Loop *  L, BasicBlockSet &  ForeBlocks, BasicBlockSet &  SubLoopBlocks, BasicBlockSet &  AftBlocks, DependenceInfo &  DI  )

static

Definition at line 662 of file LoopUnrollAndJam.cpp.

References checkDependencies(), getLoadsAndStores(), and llvm::LoopBase< BlockT, LoopT >::getLoopDepth().

getLoadsAndStores()

static bool getLoadsAndStores ( BasicBlockSet &  Blocks, SmallVector< Value *, 4 > &  MemInstr  )

static

Definition at line 587 of file LoopUnrollAndJam.cpp.

References I, and llvm::SmallVectorTemplateBase< T >::push_back().

Referenced by checkDependencies().

moveHeaderPhiOperandsToForeBlocks()

static void moveHeaderPhiOperandsToForeBlocks ( BasicBlock *  Header, BasicBlock *  Latch, Instruction *  InsertLoc, BasicBlockSet &  AftBlocks  )

static

Definition at line 117 of file LoopUnrollAndJam.cpp.

References llvm::SmallPtrSetImpl< PtrType >::count(), llvm::Instruction::getParent(), I, llvm::Instruction::moveBefore(), processHeaderPhiOperands(), and llvm::reverse().

Referenced by llvm::UnrollAndJamLoop().

partitionOuterLoopBlocks()

static bool partitionOuterLoopBlocks ( Loop *  L, Loop *  SubLoop, BasicBlockSet &  ForeBlocks, BasicBlockSet &  SubLoopBlocks, BasicBlockSet &  AftBlocks, DominatorTree *  DT  )

static

Definition at line 51 of file LoopUnrollAndJam.cpp.

References llvm::LoopBase< BlockT, LoopT >::block_begin(), llvm::LoopBase< BlockT, LoopT >::block_end(), llvm::LoopBase< BlockT, LoopT >::blocks(), llvm::LoopBase< BlockT, LoopT >::contains(), llvm::DominatorTree::dominates(), llvm::LoopBase< BlockT, LoopT >::getLoopLatch(), llvm::LoopBase< BlockT, LoopT >::getLoopPreheader(), llvm::Instruction::getNumSuccessors(), llvm::Instruction::getSuccessor(), and llvm::SmallPtrSetImpl< PtrType >::insert().

Referenced by llvm::isSafeToUnrollAndJam(), and llvm::UnrollAndJamLoop().

processHeaderPhiOperands()

template<typename T >

static bool processHeaderPhiOperands ( BasicBlock *  Header, BasicBlock *  Latch, BasicBlockSet &  AftBlocks, T  Visit  )

static

Definition at line 92 of file LoopUnrollAndJam.cpp.

References llvm::SmallVectorTemplateCommon< T >::back(), llvm::SmallPtrSetImpl< PtrType >::count(), llvm::SmallVectorBase::empty(), llvm::Instruction::getParent(), I, llvm::User::operands(), llvm::BasicBlock::phis(), llvm::SmallVectorTemplateBase< T >::pop_back(), and llvm::SmallVectorTemplateBase< T >::push_back().

Referenced by llvm::isSafeToUnrollAndJam(), and moveHeaderPhiOperandsToForeBlocks().

STATISTIC() [1/2]

STATISTIC	(	NumUnrolledAndJammed	,
		"Number of loops unroll and jammed"
	)

STATISTIC() [2/2]

STATISTIC	(	NumCompletelyUnrolledAndJammed	,
		"Number of loops unroll and jammed"
	)