LCSSA.cpp File Reference

#include "llvm/Transforms/Utils/LCSSA.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Analysis/BasicAliasAnalysis.h"
#include "llvm/Analysis/BranchProbabilityInfo.h"
#include "llvm/Analysis/GlobalsModRef.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/LoopPass.h"
#include "llvm/Analysis/MemorySSA.h"
#include "llvm/Analysis/ScalarEvolution.h"
#include "llvm/Analysis/ScalarEvolutionAliasAnalysis.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/PredIteratorCache.h"
#include "llvm/InitializePasses.h"
#include "llvm/Pass.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Transforms/Utils.h"
#include "llvm/Transforms/Utils/LoopUtils.h"
#include "llvm/Transforms/Utils/SSAUpdater.h"

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "lcssa"

Functions
	STATISTIC (NumLCSSA, "Number of live out of a loop variables")
static bool	isExitBlock (BasicBlock *BB, const SmallVectorImpl< BasicBlock * > &ExitBlocks)
	Return true if the specified block is in the list.
static void	computeBlocksDominatingExits (Loop &L, const DominatorTree &DT, SmallVector< BasicBlock *, 8 > &ExitBlocks, SmallSetVector< BasicBlock *, 8 > &BlocksDominatingExits)
static bool	formLCSSAOnAllLoops (const LoopInfo *LI, const DominatorTree &DT, ScalarEvolution *SE)
	Process all loops in the function, inner-most out.
	INITIALIZE_PASS_BEGIN (LCSSAWrapperPass, "lcssa", "Loop-Closed SSA Form Pass", false, false) INITIALIZE_PASS_END(LCSSAWrapperPass

Variables
static bool	VerifyLoopLCSSA = false
static cl::opt< bool, true >	VerifyLoopLCSSAFlag ("verify-loop-lcssa", cl::location(VerifyLoopLCSSA), cl::Hidden, cl::desc("Verify loop lcssa form (time consuming)"))
	lcssa
Loop Closed SSA Form	Pass
Loop Closed SSA Form	false

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "lcssa"

Definition at line 54 of file LCSSA.cpp.

Function Documentation

computeBlocksDominatingExits()

static void computeBlocksDominatingExits ( Loop &  L, const DominatorTree &  DT, SmallVector< BasicBlock *, 8 > &  ExitBlocks, SmallSetVector< BasicBlock *, 8 > &  BlocksDominatingExits  )

static

Definition at line 321 of file LCSSA.cpp.

References llvm::SmallVectorBase< Size_T >::empty(), llvm::DomTreeNodeBase< NodeT >::getBlock(), llvm::DomTreeNodeBase< NodeT >::getIDom(), llvm::DominatorTreeBase< NodeT, IsPostDom >::getNode(), llvm::SetVector< T, Vector, Set, N >::insert(), llvm::SmallVectorImpl< T >::pop_back_val(), and llvm::SmallVectorTemplateBase< T, bool >::push_back().

Referenced by llvm::formLCSSA().

formLCSSAOnAllLoops()

static bool formLCSSAOnAllLoops ( const LoopInfo *  LI, const DominatorTree &  DT, ScalarEvolution *  SE  )

static

Process all loops in the function, inner-most out.

Definition at line 438 of file LCSSA.cpp.

References llvm::formLCSSARecursively().

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

INITIALIZE_PASS_BEGIN()

INITIALIZE_PASS_BEGIN	(	LCSSAWrapperPass	,
		"lcssa"	,
		"Loop-Closed SSA Form Pass"	,
		false	,
		false
	)

isExitBlock()

static bool isExitBlock ( BasicBlock *  BB, const SmallVectorImpl< BasicBlock * > &  ExitBlocks  )

static

Return true if the specified block is in the list.

Definition at line 69 of file LCSSA.cpp.

References llvm::is_contained().

Referenced by llvm::formLCSSAForInstructions(), and llvm::LoopBase< BlockT, LoopT >::getExitingBlock().

STATISTIC()

STATISTIC	(	NumLCSSA	,
		"Number of live out of a loop variables"
	)

Variable Documentation

false

Loop Closed SSA Form false

Definition at line 504 of file LCSSA.cpp.

lcssa

lcssa

Definition at line 503 of file LCSSA.cpp.

Pass

Loop Closed SSA Form Pass

Definition at line 503 of file LCSSA.cpp.

VerifyLoopLCSSA

bool VerifyLoopLCSSA = false

static

Definition at line 61 of file LCSSA.cpp.

VerifyLoopLCSSAFlag

cl::opt< bool, true > VerifyLoopLCSSAFlag("verify-loop-lcssa", cl::location(VerifyLoopLCSSA), cl::Hidden, cl::desc("Verify loop lcssa form (time consuming)")) ( "verify-loop-lcssa"  , cl::location(VerifyLoopLCSSA)  , cl::Hidden  , cl::desc("Verify loop lcssa form (time consuming)")    )

static