ShrinkWrap.cpp File Reference

#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/PostOrderIterator.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/CFG.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineBlockFrequencyInfo.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachineOptimizationRemarkEmitter.h"
#include "llvm/CodeGen/MachinePostDominators.h"
#include "llvm/CodeGen/RegisterClassInfo.h"
#include "llvm/CodeGen/RegisterScavenging.h"
#include "llvm/CodeGen/TargetFrameLowering.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetLowering.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/Function.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/Pass.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetMachine.h"
#include <cassert>
#include <cstdint>
#include <memory>

Include dependency graph for ShrinkWrap.cpp:

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "shrink-wrap"

Functions
	STATISTIC (NumFunc, "Number of functions")
	STATISTIC (NumCandidates, "Number of shrink-wrapping candidates")
	STATISTIC (NumCandidatesDropped, "Number of shrink-wrapping candidates dropped because of frequency")
template<typename ListOfBBs , typename DominanceAnalysis >
static MachineBasicBlock *	FindIDom (MachineBasicBlock &Block, ListOfBBs BBs, DominanceAnalysis &Dom)
	Helper function to find the immediate (post) dominator. More...
static bool	giveUpWithRemarks (MachineOptimizationRemarkEmitter *ORE, StringRef RemarkName, StringRef RemarkMessage, const DiagnosticLocation &Loc, const MachineBasicBlock *MBB)

Variables
static cl::opt< cl::boolOrDefault >	EnableShrinkWrapOpt ("enable-shrink-wrap", cl::Hidden, cl::desc("enable the shrink-wrapping pass"))

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "shrink-wrap"

Definition at line 90 of file ShrinkWrap.cpp.

Referenced by giveUpWithRemarks().

Function Documentation

FindIDom()

template<typename ListOfBBs , typename DominanceAnalysis >

static MachineBasicBlock* FindIDom ( MachineBasicBlock &  Block, ListOfBBs  BBs, DominanceAnalysis &  Dom  )

static

Helper function to find the immediate (post) dominator.

Definition at line 306 of file ShrinkWrap.cpp.

References llvm::dbgs(), llvm::MachineDominatorTree::dominates(), llvm::MachineDominatorTree::findNearestCommonDominator(), LLVM_DEBUG, llvm::MachineBasicBlock::succ_empty(), llvm::MachineBasicBlock::successors(), llvm::MCID::Terminator, and llvm::MachineBasicBlock::terminators().

giveUpWithRemarks()

static bool giveUpWithRemarks ( MachineOptimizationRemarkEmitter *  ORE, StringRef  RemarkName, StringRef  RemarkMessage, const DiagnosticLocation &  Loc, const MachineBasicBlock *  MBB  )

static

Definition at line 442 of file ShrinkWrap.cpp.

References assert(), llvm::MachineFunction::begin(), llvm::cl::BOU_FALSE, llvm::cl::BOU_TRUE, llvm::cl::BOU_UNSET, llvm::TargetFrameLowering::canUseAsEpilogue(), llvm::TargetFrameLowering::canUseAsPrologue(), llvm::dbgs(), DEBUG_TYPE, llvm::MachineOptimizationRemarkEmitter::emit(), llvm::MachineFunction::empty(), EnableShrinkWrapOpt, llvm::TargetFrameLowering::enableShrinkWrapping(), llvm::MachineBasicBlock::front(), llvm::MachineFunction::front(), llvm::MachineBlockFrequencyInfo::getBlockFreq(), llvm::MachineInstr::getDebugLoc(), llvm::TargetSubtargetInfo::getFrameLowering(), llvm::BlockFrequency::getFrequency(), llvm::MachineFunction::getFunction(), llvm::TargetMachine::getMCAsmInfo(), llvm::MachineBasicBlock::getName(), llvm::MachineFunction::getName(), llvm::MachineBasicBlock::getNumber(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::Function::getSubprogram(), llvm::MachineFunction::getSubtarget(), llvm::MachineFunction::getTarget(), llvm::Function::hasFnAttribute(), llvm::cl::init(), llvm::MachineBasicBlock::isEHFuncletEntry(), llvm::MachineBasicBlock::isEHPad(), LLVM_DEBUG, llvm_unreachable, MI, llvm::Attribute::SanitizeAddress, llvm::Attribute::SanitizeHWAddress, llvm::Attribute::SanitizeMemory, llvm::Attribute::SanitizeThread, llvm::MachineFrameInfo::setSavePoint(), llvm::MachineBasicBlock::successors(), TRI, and llvm::MCAsmInfo::usesWindowsCFI().

STATISTIC() [1/3]

STATISTIC	(	NumFunc	,
		"Number of functions"
	)

STATISTIC() [2/3]

STATISTIC	(	NumCandidates	,
		"Number of shrink-wrapping candidates"
	)

STATISTIC() [3/3]

STATISTIC	(	NumCandidatesDropped	,
		"Number of shrink-wrapping candidates dropped because of frequency"
	)

Variable Documentation

EnableShrinkWrapOpt

cl::opt<cl::boolOrDefault> EnableShrinkWrapOpt("enable-shrink-wrap", cl::Hidden, cl::desc("enable the shrink-wrapping pass"))

static

Referenced by giveUpWithRemarks().