Assignment Tracking (at). More...

Classes
struct	AssignmentInfo
	Describes properties of a store that has a static size and offset into a some base storage. More...

class	DbgAssignIt
	High level: this is an iterator for llvm.dbg.assign intrinsics. More...

struct	VarRecord
	Helper struct for trackAssignments, below. More...

Typedefs
using	AssignmentInstRange = iterator_range< SmallVectorImpl< Instruction * >::iterator >
	A range of instructions.

using	AssignmentMarkerRange = iterator_range< DbgAssignIt >
	A range of llvm.dbg.assign intrinsics.

using	StorageToVarsMap = DenseMap< const AllocaInst *, SmallSet< VarRecord, 2 > >
	Map of backing storage to a set of variables that are stored to it.

Functions
AssignmentInstRange	getAssignmentInsts (DIAssignID *ID)
	Return a range of instructions (typically just one) that have `ID` as an attachment.

AssignmentInstRange	getAssignmentInsts (const DbgAssignIntrinsic *DAI)
	Return a range of instructions (typically just one) that perform the assignment that `DAI` encodes.

AssignmentMarkerRange	getAssignmentMarkers (DIAssignID *ID)
	Return a range of dbg.assign intrinsics which use \ID as an operand.

AssignmentMarkerRange	getAssignmentMarkers (const Instruction *Inst)
	Return a range of dbg.assign intrinsics for which `Inst` performs the assignment they encode.

void	deleteAssignmentMarkers (const Instruction *Inst)
	Delete the llvm.dbg.assign intrinsics linked to `Inst`.

void	RAUW (DIAssignID Old, DIAssignID New)
	Replace all uses (and attachments) of `Old` with `New`.

void	deleteAll (Function *F)
	Remove all Assignment Tracking related intrinsics and metadata from `F`.

void	trackAssignments (Function::iterator Start, Function::iterator End, const StorageToVarsMap &Vars, const DataLayout &DL, bool DebugPrints=false)
	Track assignments to `Vars` between `Start` and `End`.

std::optional< AssignmentInfo >	getAssignmentInfo (const DataLayout &DL, const MemIntrinsic *I)

std::optional< AssignmentInfo >	getAssignmentInfo (const DataLayout &DL, const StoreInst *SI)

std::optional< AssignmentInfo >	getAssignmentInfo (const DataLayout &DL, const AllocaInst *AI)

Detailed Description

Assignment Tracking (at).

Typedef Documentation

◆ AssignmentInstRange

using llvm::at::AssignmentInstRange = typedef iterator_range<SmallVectorImpl<Instruction *>::iterator>

A range of instructions.

Definition at line 176 of file DebugInfo.h.

◆ AssignmentMarkerRange

using llvm::at::AssignmentMarkerRange = typedef iterator_range<DbgAssignIt>

A range of llvm.dbg.assign intrinsics.

Definition at line 209 of file DebugInfo.h.

◆ StorageToVarsMap

using llvm::at::StorageToVarsMap = typedef DenseMap<const AllocaInst *, SmallSet<VarRecord, 2> >

Map of backing storage to a set of variables that are stored to it.

TODO: Backing storage shouldn't be limited to allocas only. Some local variables have their storage allocated by the calling function (addresses passed in with sret & byval parameters).

Definition at line 257 of file DebugInfo.h.

Function Documentation

◆ deleteAll()

void llvm::at::deleteAll ( Function * F )

Remove all Assignment Tracking related intrinsics and metadata from F.

Definition at line 1791 of file DebugInfo.cpp.

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

◆ deleteAssignmentMarkers()

void llvm::at::deleteAssignmentMarkers ( const Instruction * Inst )

Delete the llvm.dbg.assign intrinsics linked to Inst.

Definition at line 1764 of file DebugInfo.cpp.

References getAssignmentMarkers().

Referenced by promoteSingleBlockAlloca(), and rewriteSingleStoreAlloca().

◆ getAssignmentInfo() [1/3]

std::optional< AssignmentInfo > llvm::at::getAssignmentInfo	(	const DataLayout &	DL,
		const AllocaInst *	AI
	)

Definition at line 1841 of file DebugInfo.cpp.

References DL, llvm::AllocaInst::getAllocatedType(), and getAssignmentInfoImpl().

◆ getAssignmentInfo() [2/3]

std::optional< AssignmentInfo > llvm::at::getAssignmentInfo	(	const DataLayout &	DL,
		const MemIntrinsic *	I
	)

Definition at line 1822 of file DebugInfo.cpp.

References DL, getAssignmentInfoImpl(), and I.

Referenced by getUntaggedStoreAssignmentInfo(), and trackAssignments().

◆ getAssignmentInfo() [3/3]

std::optional< AssignmentInfo > llvm::at::getAssignmentInfo	(	const DataLayout &	DL,
		const StoreInst *	SI
	)

Definition at line 1834 of file DebugInfo.cpp.

References DL, getAssignmentInfoImpl(), and SI.

◆ getAssignmentInsts() [1/2]

AssignmentInstRange llvm::at::getAssignmentInsts ( const DbgAssignIntrinsic * DAI )

inline

Return a range of instructions (typically just one) that perform the assignment that DAI encodes.

Iterators invalidated by adding or removing DIAssignID metadata to/from any instruction (including by deleting or cloning instructions).

Definition at line 187 of file DebugInfo.h.

References llvm::DbgAssignIntrinsic::getAssignID(), and getAssignmentInsts().

◆ getAssignmentInsts() [2/2]

AssignmentInstRange llvm::at::getAssignmentInsts ( DIAssignID * ID )

Return a range of instructions (typically just one) that have ID as an attachment.

Iterators invalidated by adding or removing DIAssignID metadata to/from any instruction (including by deleting or cloning instructions).

Definition at line 1738 of file DebugInfo.cpp.

References assert(), llvm::LLVMContextImpl::AssignmentIDToInstrs, llvm::make_range(), and llvm::LLVMContext::pImpl.

Referenced by getAssignmentInsts(), RAUW(), remomveUndefDbgAssignsFromEntryBlock(), removeRedundantDbgInstrsUsingBackwardScan(), and removeRedundantDbgInstrsUsingForwardScan().

◆ getAssignmentMarkers() [1/2]

AssignmentMarkerRange llvm::at::getAssignmentMarkers ( const Instruction * Inst )

inline

Return a range of dbg.assign intrinsics for which Inst performs the assignment they encode.

Iterators invalidated by deleting an intrinsic contained in this range.

Definition at line 216 of file DebugInfo.h.

References getAssignmentMarkers(), llvm::Instruction::getMetadata(), and llvm::make_range().

◆ getAssignmentMarkers() [2/2]

AssignmentMarkerRange llvm::at::getAssignmentMarkers ( DIAssignID * ID )

Return a range of dbg.assign intrinsics which use \ID as an operand.

Iterators invalidated by deleting an intrinsic contained in this range.

Definition at line 1750 of file DebugInfo.cpp.

References assert(), llvm::MetadataAsValue::getIfExists(), and llvm::make_range().

Referenced by buildOverlapMapAndRecordDeclares(), collectEscapedLocals(), deleteAssignmentMarkers(), findVarsWithStackSlot(), getAssignmentMarkers(), shortenAssignment(), and llvm::InstCombinerImpl::SimplifyAnyMemSet().

◆ RAUW()

void llvm::at::RAUW	(	DIAssignID *	Old,
		DIAssignID *	New
	)

Replace all uses (and attachments) of Old with New.

Definition at line 1773 of file DebugInfo.cpp.

References llvm::iterator_range< IteratorT >::begin(), llvm::iterator_range< IteratorT >::end(), llvm::MetadataAsValue::get(), getAssignmentInsts(), llvm::MDNode::getContext(), llvm::MetadataAsValue::getIfExists(), and I.

Referenced by llvm::Instruction::mergeDIAssignID().

◆ trackAssignments()

void llvm::at::trackAssignments	(	Function::iterator	Start,
		Function::iterator	End,
		const StorageToVarsMap &	Vars,
		const DataLayout &	DL,
		bool	DebugPrints = `false`
	)

Track assignments to Vars between Start and End.

Definition at line 1871 of file DebugInfo.cpp.

References assert(), DL, emitDbgAssign(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::empty(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::end(), llvm::errs(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::find(), llvm::UndefValue::get(), getAssignmentInfo(), llvm::DIAssignID::getDistinct(), llvm::Type::getInt1Ty(), I, Info, LLVM_DEBUG, MI, and SI.

Referenced by trackInlinedStores().

Classes

Typedefs

Functions