WinEHPrepare.cpp File Reference

#include "llvm/CodeGen/WinEHPrepare.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/WinEHFuncInfo.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/EHPersonalities.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Verifier.h"
#include "llvm/InitializePasses.h"
#include "llvm/Pass.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/TargetParser/Triple.h"
#include "llvm/Transforms/Utils/BasicBlockUtils.h"
#include "llvm/Transforms/Utils/Cloning.h"
#include "llvm/Transforms/Utils/Local.h"
#include "llvm/Transforms/Utils/SSAUpdater.h"

Go to the source code of this file.

Classes
struct	WorkItem

Macros
#define	DEBUG_TYPE   "win-eh-prepare"

Functions
	INITIALIZE_PASS (WinEHPrepare, DEBUG_TYPE, "Prepare Windows exceptions", false, false) FunctionPass *llvm
static int	addUnwindMapEntry (WinEHFuncInfo &FuncInfo, int ToState, const BasicBlock *BB)
static void	addTryBlockMapEntry (WinEHFuncInfo &FuncInfo, int TryLow, int TryHigh, int CatchHigh, ArrayRef< const CatchPadInst * > Handlers)
static BasicBlock *	getCleanupRetUnwindDest (const CleanupPadInst *CleanupPad)
static void	calculateStateNumbersForInvokes (const Function *Fn, WinEHFuncInfo &FuncInfo)
static const BasicBlock *	getEHPadFromPredecessor (const BasicBlock *BB, Value *ParentPad)
static void	calculateCXXStateNumbers (WinEHFuncInfo &FuncInfo, const Instruction *FirstNonPHI, int ParentState)
static int	addSEHExcept (WinEHFuncInfo &FuncInfo, int ParentState, const Function *Filter, const BasicBlock *Handler)
static int	addSEHFinally (WinEHFuncInfo &FuncInfo, int ParentState, const BasicBlock *Handler)
static void	calculateSEHStateNumbers (WinEHFuncInfo &FuncInfo, const Instruction *FirstNonPHI, int ParentState)
static bool	isTopLevelPadForMSVC (const Instruction *EHPad)
static int	addClrEHHandler (WinEHFuncInfo &FuncInfo, int HandlerParentState, int TryParentState, ClrHandlerType HandlerType, uint32_t TypeToken, const BasicBlock *Handler)

Variables
static cl::opt< bool >	DisableDemotion ("disable-demotion", cl::Hidden, cl::desc("Clone multicolor basic blocks but do not demote cross scopes"), cl::init(false))
static cl::opt< bool >	DisableCleanups ("disable-cleanups", cl::Hidden, cl::desc("Do not remove implausible terminators or other similar cleanups"), cl::init(false))
static cl::opt< bool >	DemoteCatchSwitchPHIOnlyOpt ("demote-catchswitch-only", cl::Hidden, cl::desc("Demote catchswitch BBs only (for wasm EH)"), cl::init(false))

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "win-eh-prepare"

Definition at line 43 of file WinEHPrepare.cpp.

Function Documentation

addClrEHHandler()

int addClrEHHandler ( WinEHFuncInfo & FuncInfo, int HandlerParentState, int TryParentState, ClrHandlerType HandlerType, uint32_t TypeToken, const BasicBlock * Handler )

static

Definition at line 640 of file WinEHPrepare.cpp.

References llvm::WinEHFuncInfo::ClrEHUnwindMap, and llvm::ClrEHUnwindMapEntry::HandlerParentState.

Referenced by llvm::calculateClrEHStateNumbers().

addSEHExcept()

int addSEHExcept ( WinEHFuncInfo & FuncInfo, int ParentState, const Function * Filter, const BasicBlock * Handler )

static

Definition at line 475 of file WinEHPrepare.cpp.

References llvm::Filter, llvm::WinEHFuncInfo::SEHUnwindMap, and llvm::SEHUnwindMapEntry::ToState.

Referenced by calculateSEHStateNumbers().

addSEHFinally()

int addSEHFinally ( WinEHFuncInfo & FuncInfo, int ParentState, const BasicBlock * Handler )

static

Definition at line 486 of file WinEHPrepare.cpp.

References llvm::WinEHFuncInfo::SEHUnwindMap, and llvm::SEHUnwindMapEntry::ToState.

Referenced by calculateSEHStateNumbers().

addTryBlockMapEntry()

void addTryBlockMapEntry ( WinEHFuncInfo & FuncInfo, int TryLow, int TryHigh, int CatchHigh, ArrayRef< const CatchPadInst * > Handlers )

static

Definition at line 155 of file WinEHPrepare.cpp.

References llvm::WinEHHandlerType::Adjectives, llvm::WinEHHandlerType::Alloca, assert(), llvm::cast(), llvm::WinEHTryBlockMapEntry::CatchHigh, llvm::WinEHHandlerType::CatchObj, llvm::dyn_cast(), llvm::WinEHHandlerType::Handler, llvm::WinEHTryBlockMapEntry::HandlerArray, llvm::Constant::isNullValue(), llvm::Constant::stripPointerCasts(), llvm::WinEHFuncInfo::TryBlockMap, llvm::WinEHTryBlockMapEntry::TryHigh, llvm::WinEHTryBlockMapEntry::TryLow, and llvm::WinEHHandlerType::TypeDescriptor.

Referenced by calculateCXXStateNumbers().

addUnwindMapEntry()

int addUnwindMapEntry ( WinEHFuncInfo & FuncInfo, int ToState, const BasicBlock * BB )

static

Definition at line 146 of file WinEHPrepare.cpp.

References llvm::CxxUnwindMapEntry::Cleanup, llvm::WinEHFuncInfo::CxxUnwindMap, llvm::WinEHFuncInfo::getLastStateNumber(), and llvm::CxxUnwindMapEntry::ToState.

Referenced by calculateCXXStateNumbers().

calculateCXXStateNumbers()

void calculateCXXStateNumbers ( WinEHFuncInfo & FuncInfo, const Instruction * FirstNonPHI, int ParentState )

static

Definition at line 378 of file WinEHPrepare.cpp.

References addTryBlockMapEntry(), addUnwindMapEntry(), assert(), calculateCXXStateNumbers(), llvm::cast(), llvm::dbgs(), llvm::dyn_cast(), llvm::WinEHFuncInfo::EHPadStateMap, llvm::WinEHFuncInfo::FuncletBaseStateMap, getCleanupRetUnwindDest(), getEHPadFromPredecessor(), llvm::WinEHFuncInfo::getLastStateNumber(), llvm::Value::getName(), llvm::BasicBlock::getParent(), llvm::GlobalValue::getParent(), llvm::ilist_detail::node_parent_access< NodeTy, ParentTy >::getParent(), llvm::BasicBlock::isEHPad(), LLVM_DEBUG, Mod, llvm::predecessors(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::report_fatal_error(), llvm::WinEHFuncInfo::TryBlockMap, and llvm::Value::users().

Referenced by calculateCXXStateNumbers(), and llvm::calculateWinCXXEHStateNumbers().

calculateSEHStateNumbers()

void calculateSEHStateNumbers ( WinEHFuncInfo & FuncInfo, const Instruction * FirstNonPHI, int ParentState )

static

Definition at line 500 of file WinEHPrepare.cpp.

References addSEHExcept(), addSEHFinally(), assert(), llvm::calculateSEHStateNumbers(), llvm::cast(), llvm::dbgs(), llvm::dyn_cast(), llvm::WinEHFuncInfo::EHPadStateMap, llvm::Filter, getCleanupRetUnwindDest(), getEHPadFromPredecessor(), llvm::Value::getName(), llvm::BasicBlock::getParent(), llvm::ilist_detail::node_parent_access< NodeTy, ParentTy >::getParent(), llvm::BasicBlock::isEHPad(), llvm::Constant::isNullValue(), LLVM_DEBUG, llvm::predecessors(), llvm::report_fatal_error(), and llvm::Value::users().

calculateStateNumbersForInvokes()

void calculateStateNumbersForInvokes ( const Function * Fn, WinEHFuncInfo & FuncInfo )

static

Definition at line 189 of file WinEHPrepare.cpp.

References assert(), llvm::colorEHFunclets(), llvm::dyn_cast(), llvm::WinEHFuncInfo::EHPadStateMap, F, llvm::BasicBlock::front(), llvm::WinEHFuncInfo::FuncletBaseStateMap, getCleanupRetUnwindDest(), llvm::Function::getEntryBlock(), llvm::BasicBlock::getFirstNonPHIIt(), II, llvm::WinEHFuncInfo::InvokeStateMap, and llvm_unreachable.

Referenced by llvm::calculateClrEHStateNumbers(), llvm::calculateSEHStateNumbers(), and llvm::calculateWinCXXEHStateNumbers().

getCleanupRetUnwindDest()

BasicBlock * getCleanupRetUnwindDest ( const CleanupPadInst * CleanupPad )

static

Definition at line 182 of file WinEHPrepare.cpp.

References llvm::dyn_cast(), and llvm::Value::users().

Referenced by calculateCXXStateNumbers(), calculateSEHStateNumbers(), calculateStateNumbersForInvokes(), and isTopLevelPadForMSVC().

getEHPadFromPredecessor()

const BasicBlock * getEHPadFromPredecessor ( const BasicBlock * BB, Value * ParentPad )

static

Definition at line 358 of file WinEHPrepare.cpp.

References assert(), llvm::cast(), llvm::dyn_cast(), llvm::BasicBlock::getTerminator(), llvm::isa(), and llvm::Instruction::isEHPad().

Referenced by calculateCXXStateNumbers(), and calculateSEHStateNumbers().

INITIALIZE_PASS()

INITIALIZE_PASS	(	WinEHPrepare	,
		DEBUG_TYPE	,
		"Prepare Windows exceptions"	,
		false	,
		false	)

Definition at line 124 of file WinEHPrepare.cpp.

References llvm::createWinEHPass(), and DEBUG_TYPE.

isTopLevelPadForMSVC()

bool isTopLevelPadForMSVC ( const Instruction * EHPad )

static

Definition at line 580 of file WinEHPrepare.cpp.

References llvm::dyn_cast(), getCleanupRetUnwindDest(), llvm::isa(), and llvm_unreachable.

Referenced by llvm::calculateSEHStateNumbers(), and llvm::calculateWinCXXEHStateNumbers().

Variable Documentation

DemoteCatchSwitchPHIOnlyOpt

cl::opt< bool > DemoteCatchSwitchPHIOnlyOpt("demote-catchswitch-only", cl::Hidden, cl::desc("Demote catchswitch BBs only (for wasm EH)"), cl::init(false)) ( "demote-catchswitch-only" , cl::Hidden , cl::desc("Demote catchswitch BBs only (for wasm EH)") , cl::init(false)  )

static

DisableCleanups

cl::opt< bool > DisableCleanups("disable-cleanups", cl::Hidden, cl::desc("Do not remove implausible terminators or other similar cleanups"), cl::init(false)) ( "disable-cleanups" , cl::Hidden , cl::desc("Do not remove implausible terminators or other similar cleanups") , cl::init(false)  )

static

DisableDemotion

cl::opt< bool > DisableDemotion("disable-demotion", cl::Hidden, cl::desc( "Clone multicolor basic blocks but do not demote cross scopes"), cl::init(false)) ( "disable-demotion" , cl::Hidden , cl::desc( "Clone multicolor basic blocks but do not demote cross scopes") , cl::init(false)  )

static