Per-instruction record of debug-info. More...

#include "llvm/IR/DebugProgramInstruction.h"

Public Member Functions
	DbgMarker ()

bool	empty () const

const BasicBlock *	getParent () const

BasicBlock *	getParent ()

void	removeMarker ()
	Handle the removal of a marker: the position of debug-info has gone away, but the stored debug records should not.

void	dump () const

void	removeFromParent ()

void	eraseFromParent ()

void	print (raw_ostream &O, bool IsForDebug=false) const
	Implement operator<< on DbgMarker.

void	print (raw_ostream &ROS, ModuleSlotTracker &MST, bool IsForDebug) const

iterator_range< simple_ilist< DbgRecord >::iterator >	getDbgRecordRange ()
	Produce a range over all the DbgRecords in this Marker.

iterator_range< simple_ilist< DbgRecord >::const_iterator >	getDbgRecordRange () const

void	absorbDebugValues (DbgMarker &Src, bool InsertAtHead)
	Transfer any DbgRecords from `Src` into this DbgMarker.

void	absorbDebugValues (iterator_range< DbgRecord::self_iterator > Range, DbgMarker &Src, bool InsertAtHead)
	Transfer the DbgRecords in `Range` from `Src` into this DbgMarker.

void	insertDbgRecord (DbgRecord *New, bool InsertAtHead)
	Insert a DbgRecord into this DbgMarker, at the end of the list.

void	insertDbgRecord (DbgRecord New, DbgRecord InsertBefore)
	Insert a DbgRecord prior to a DbgRecord contained within this marker.

void	insertDbgRecordAfter (DbgRecord New, DbgRecord InsertAfter)
	Insert a DbgRecord after a DbgRecord contained within this marker.

iterator_range< simple_ilist< DbgRecord >::iterator >	cloneDebugInfoFrom (DbgMarker *From, std::optional< simple_ilist< DbgRecord >::iterator > FromHere, bool InsertAtHead=false)
	Clone all DbgMarkers from `From` into this marker.

void	dropDbgRecords ()
	Erase all DbgRecords in this DbgMarker.

void	dropOneDbgRecord (DbgRecord *DR)
	Erase a single DbgRecord from this marker.

Static Public Member Functions
static iterator_range< simple_ilist< DbgRecord >::iterator >	getEmptyDbgRecordRange ()

Public Attributes
Instruction *	MarkedInstr = nullptr
	Link back to the Instruction that owns this marker.

simple_ilist< DbgRecord >	StoredDbgRecords
	List of DbgRecords, the non-instruction equivalent of llvm.dbg.

Static Public Attributes
static DbgMarker	EmptyDbgMarker
	We generally act like all llvm Instructions have a range of DbgRecords attached to them, but in reality sometimes we don't allocate the DbgMarker to save time and memory, but still have to return ranges of DbgRecords.

Detailed Description

Per-instruction record of debug-info.

If an Instruction is the position of some debugging information, it points at a DbgMarker storing that info. Each marker points back at the instruction that owns it. Various utilities are provided for manipulating the DbgRecords contained within this marker.

This class has a rough surface area, because it's needed to preserve the one arefact that we can't yet eliminate from the intrinsic / dbg.value debug-info design: the order of records is significant, and duplicates can exist. Thus, if one has a run of debug-info records such as: dbg.value(... foo = barinst dbg.value(... and remove barinst, then the dbg.values must be preserved in the correct order. Hence, the use of iterators to select positions to insert things into, or the occasional InsertAtHead parameter indicating that new records should go at the start of the list.

There are only five or six places in LLVM that truly rely on this ordering, which we can improve in the future. Additionally, many improvements in the way that debug-info is stored can be achieved in this class, at a future date.

Definition at line 575 of file DebugProgramInstruction.h.

Constructor & Destructor Documentation

◆ DbgMarker()

llvm::DbgMarker::DbgMarker ( )

inline

Definition at line 577 of file DebugProgramInstruction.h.

Member Function Documentation

◆ absorbDebugValues() [1/2]

void llvm::DbgMarker::absorbDebugValues	(	DbgMarker &	Src,
		bool	InsertAtHead
	)

Transfer any DbgRecords from Src into this DbgMarker.

If InsertAtHead is true, place them before existing DbgRecords, otherwise afterwards.

Definition at line 671 of file DebugProgramInstruction.cpp.

References llvm::DbgRecord::setMarker(), and StoredDbgRecords.

Referenced by removeMarker().

◆ absorbDebugValues() [2/2]

void llvm::DbgMarker::absorbDebugValues	(	iterator_range< DbgRecord::self_iterator >	Range,
		DbgMarker &	Src,
		bool	InsertAtHead
	)

Transfer the DbgRecords in Range from Src into this DbgMarker.

If InsertAtHead is true, place them before existing DbgRecords, otherwise

Definition at line 679 of file DebugProgramInstruction.cpp.

References Range, and StoredDbgRecords.

◆ cloneDebugInfoFrom()

iterator_range< simple_ilist< DbgRecord >::iterator > llvm::DbgMarker::cloneDebugInfoFrom	(	DbgMarker *	From,
		std::optional< simple_ilist< DbgRecord >::iterator >	FromHere,
		bool	InsertAtHead = `false`
	)

Clone all DbgMarkers from From into this marker.

There are numerous options to customise the source/destination, due to gnarliness, see class comment. FromHere If non-null, copy from FromHere to the end of From's DbgRecords InsertAtHead Place the cloned DbgRecords at the start of StoredDbgRecords

Returns: Range over all the newly cloned DbgRecords

Definition at line 692 of file DebugProgramInstruction.cpp.

References llvm::First, From, llvm::make_range(), Range, and StoredDbgRecords.

Referenced by llvm::JumpThreadingPass::cloneInstructions().

◆ dropDbgRecords()

void llvm::DbgMarker::dropDbgRecords ( )

Erase all DbgRecords in this DbgMarker.

Definition at line 570 of file DebugProgramInstruction.cpp.

References llvm::DbgRecord::deleteRecord(), and StoredDbgRecords.

Referenced by eraseFromParent().

◆ dropOneDbgRecord()

void llvm::DbgMarker::dropOneDbgRecord ( DbgRecord * DR )

Erase a single DbgRecord from this marker.

In an ideal future, we would never erase an assignment in this way, but it's the equivalent to erasing a debug intrinsic from a block.

Definition at line 579 of file DebugProgramInstruction.cpp.

References assert(), llvm::DbgRecord::deleteRecord(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::DbgRecord::getMarker(), and StoredDbgRecords.

◆ dump()

LLVM_DUMP_METHOD void DbgMarker::dump ( ) const

Definition at line 5308 of file AsmWriter.cpp.

References llvm::dbgs(), and print().

◆ empty()

bool llvm::DbgMarker::empty ( ) const

inline

Definition at line 587 of file DebugProgramInstruction.h.

References StoredDbgRecords.

◆ eraseFromParent()

void llvm::DbgMarker::eraseFromParent ( )

Definition at line 628 of file DebugProgramInstruction.cpp.

References dropDbgRecords(), MarkedInstr, and removeFromParent().

Referenced by removeMarker().

◆ getDbgRecordRange() [1/2]

iterator_range< DbgRecord::self_iterator > llvm::DbgMarker::getDbgRecordRange ( )

Produce a range over all the DbgRecords in this Marker.

Definition at line 635 of file DebugProgramInstruction.cpp.

References llvm::make_range(), and StoredDbgRecords.

Referenced by llvm::getDbgRecordRange(), and getNextNode().

◆ getDbgRecordRange() [2/2]

iterator_range< DbgRecord::const_self_iterator > llvm::DbgMarker::getDbgRecordRange ( ) const

Definition at line 639 of file DebugProgramInstruction.cpp.

References llvm::make_range(), and StoredDbgRecords.

◆ getEmptyDbgRecordRange()

static iterator_range< simple_ilist< DbgRecord >::iterator > llvm::DbgMarker::getEmptyDbgRecordRange ( )

inlinestatic

Definition at line 653 of file DebugProgramInstruction.h.

References EmptyDbgMarker, llvm::make_range(), and StoredDbgRecords.

Referenced by llvm::getDbgRecordRange().

◆ getParent() [1/2]

BasicBlock * llvm::DbgMarker::getParent ( )

Definition at line 589 of file DebugProgramInstruction.cpp.

References llvm::ilist_detail::node_parent_access< NodeTy, ParentTy >::getParent(), and MarkedInstr.

◆ getParent() [2/2]

const BasicBlock * llvm::DbgMarker::getParent ( ) const

Definition at line 585 of file DebugProgramInstruction.cpp.

References llvm::ilist_detail::node_parent_access< NodeTy, ParentTy >::getParent(), and MarkedInstr.

Referenced by formLCSSAForInstructionsImpl(), llvm::DbgRecord::getBlock(), getModuleFromDPI(), llvm::DbgLabelRecord::print(), llvm::DbgVariableRecord::print(), print(), removeMarker(), and RewriteUsesOfClonedInstructions().

◆ insertDbgRecord() [1/2]

void llvm::DbgMarker::insertDbgRecord	(	DbgRecord *	New,
		bool	InsertAtHead
	)

Insert a DbgRecord into this DbgMarker, at the end of the list.

If InsertAtHead is true, at the start.

Definition at line 653 of file DebugProgramInstruction.cpp.

References StoredDbgRecords.

Referenced by llvm::DbgRecord::insertBefore().

◆ insertDbgRecord() [2/2]

void llvm::DbgMarker::insertDbgRecord	(	DbgRecord *	New,
		DbgRecord *	InsertBefore
	)

Insert a DbgRecord prior to a DbgRecord contained within this marker.

Definition at line 658 of file DebugProgramInstruction.cpp.

References assert(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::DbgRecord::getMarker(), and StoredDbgRecords.

◆ insertDbgRecordAfter()

void llvm::DbgMarker::insertDbgRecordAfter	(	DbgRecord *	New,
		DbgRecord *	InsertAfter
	)

Insert a DbgRecord after a DbgRecord contained within this marker.

Definition at line 664 of file DebugProgramInstruction.cpp.

References assert(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::DbgRecord::getMarker(), and StoredDbgRecords.

Referenced by llvm::DbgRecord::insertAfter().

◆ print() [1/2]

void DbgMarker::print	(	raw_ostream &	O,
		bool	IsForDebug = `false`
	)		const

Implement operator<< on DbgMarker.

Definition at line 4995 of file AsmWriter.cpp.

References getModuleFromDPI(), and print().

Referenced by dump(), llvm::operator<<(), and print().

◆ print() [2/2]

void DbgMarker::print	(	raw_ostream &	ROS,
		ModuleSlotTracker &	MST,
		bool	IsForDebug
	)		const

Definition at line 5007 of file AsmWriter.cpp.

References F, llvm::ModuleSlotTracker::getMachine(), getModuleFromDPI(), getParent(), llvm::ModuleSlotTracker::incorporateFunction(), and OS.

◆ removeFromParent()

void llvm::DbgMarker::removeFromParent ( )

Definition at line 623 of file DebugProgramInstruction.cpp.

References llvm::Instruction::DebugMarker, and MarkedInstr.

Referenced by eraseFromParent().

◆ removeMarker()

void llvm::DbgMarker::removeMarker ( )

Handle the removal of a marker: the position of debug-info has gone away, but the stored debug records should not.

Drop them onto the next instruction, or otherwise work out what to do with them.

Definition at line 591 of file DebugProgramInstruction.cpp.

References absorbDebugValues(), llvm::Instruction::DebugMarker, eraseFromParent(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::ilist_detail::node_parent_access< NodeTy, ParentTy >::getParent(), getParent(), MarkedInstr, llvm::BasicBlock::setTrailingDbgRecords(), and StoredDbgRecords.

Member Data Documentation

◆ EmptyDbgMarker

DbgMarker llvm::DbgMarker::EmptyDbgMarker

static

We generally act like all llvm Instructions have a range of DbgRecords attached to them, but in reality sometimes we don't allocate the DbgMarker to save time and memory, but still have to return ranges of DbgRecords.

When we need to describe such an unallocated DbgRecord range, use this static markers range instead. This will bite us if someone tries to insert a DbgRecord in that range, but they should be using the Official (TM) API for that.

Definition at line 651 of file DebugProgramInstruction.h.

Referenced by getEmptyDbgRecordRange().

◆ MarkedInstr

Instruction* llvm::DbgMarker::MarkedInstr = nullptr

Link back to the Instruction that owns this marker.

Can be null during operations that move a marker from one instruction to another.

Definition at line 580 of file DebugProgramInstruction.h.

Referenced by eraseFromParent(), llvm::DbgRecord::getInstruction(), getNextNode(), llvm::DbgRecord::getParent(), getParent(), removeFromParent(), removeMarker(), and rewriteDebugUsers().

◆ StoredDbgRecords

simple_ilist<DbgRecord> llvm::DbgMarker::StoredDbgRecords

List of DbgRecords, the non-instruction equivalent of llvm.dbg.

intrinsics. There is a one-to-one relationship between each debug intrinsic in a block and each DbgRecord once the representation has been converted, and the ordering is meaningful in the same way.

Definition at line 586 of file DebugProgramInstruction.h.

Referenced by absorbDebugValues(), cloneDebugInfoFrom(), dropDbgRecords(), dropOneDbgRecord(), empty(), getDbgRecordRange(), getEmptyDbgRecordRange(), insertDbgRecord(), insertDbgRecordAfter(), llvm::DbgRecord::removeFromParent(), and removeMarker().

The documentation for this class was generated from the following files:

include/llvm/IR/DebugProgramInstruction.h
lib/IR/AsmWriter.cpp
lib/IR/DebugProgramInstruction.cpp

Public Member Functions

Static Public Member Functions

Public Attributes

Static Public Attributes