llvm::MachineJumpTableInfo Class Reference

#include <MachineJumpTableInfo.h>

Public Types
enum	JTEntryKind {   EK_BlockAddress, EK_GPRel64BlockAddress, EK_GPRel32BlockAddress, EK_LabelDifference32,   EK_Inline, EK_Custom32 }

Public Member Functions
	MachineJumpTableInfo (JTEntryKind Kind)
JTEntryKind	getEntryKind () const
unsigned	getEntrySize (const DataLayout &TD) const
	getEntrySize - Return the size of each entry in the jump table. More...
unsigned	getEntryAlignment (const DataLayout &TD) const
	getEntryAlignment - Return the alignment of each entry in the jump table. More...
unsigned	createJumpTableIndex (const std::vector< MachineBasicBlock * > &DestBBs)
bool	isEmpty () const
const std::vector < MachineJumpTableEntry > &	getJumpTables () const
void	RemoveJumpTable (unsigned Idx)
bool	ReplaceMBBInJumpTables (MachineBasicBlock *Old, MachineBasicBlock *New)
bool	ReplaceMBBInJumpTable (unsigned Idx, MachineBasicBlock *Old, MachineBasicBlock *New)
void	print (raw_ostream &OS) const
void	dump () const

Detailed Description

Definition at line 42 of file MachineJumpTableInfo.h.

Member Enumeration Documentation

enum llvm::MachineJumpTableInfo::JTEntryKind

JTEntryKind - This enum indicates how each entry of the jump table is represented and emitted.

Enumerator
EK_BlockAddress	EK_BlockAddress - Each entry is a plain address of block, e.g.: .word LBB123
EK_GPRel64BlockAddress	EK_GPRel64BlockAddress - Each entry is an address of block, encoded with a relocation as gp-relative, e.g.: .gpdword LBB123
EK_GPRel32BlockAddress	EK_GPRel32BlockAddress - Each entry is an address of block, encoded with a relocation as gp-relative, e.g.: .gprel32 LBB123
EK_LabelDifference32	EK_LabelDifference32 - Each entry is the address of the block minus the address of the jump table. This is used for PIC jump tables where gprel32 is not supported. e.g.: .word LBB123 - LJTI1_2 If the .set directive is supported, this is emitted as: .set L4_5_set_123, LBB123 - LJTI1_2 .word L4_5_set_123
EK_Inline	EK_Inline - Jump table entries are emitted inline at their point of use. It is the responsibility of the target to emit the entries.
EK_Custom32	EK_Custom32 - Each entry is a 32-bit value that is custom lowered by the TargetLowering::LowerCustomJumpTableEntry hook.

Definition at line 46 of file MachineJumpTableInfo.h.

Constructor & Destructor Documentation

llvm::MachineJumpTableInfo::MachineJumpTableInfo ( JTEntryKind  Kind )

inlineexplicit

Definition at line 82 of file MachineJumpTableInfo.h.

Member Function Documentation

unsigned MachineJumpTableInfo::createJumpTableIndex

(

const std::vector< MachineBasicBlock * > &

DestBBs

)

createJumpTableIndex - Create a new jump table.

createJumpTableIndex - Create a new jump table entry in the jump table info.

Definition at line 731 of file MachineFunction.cpp.

void MachineJumpTableInfo::dump

(

)

const

dump - Call to stderr.

Definition at line 780 of file MachineFunction.cpp.

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

unsigned MachineJumpTableInfo::getEntryAlignment

(

const DataLayout &

TD

)

const

getEntryAlignment - Return the alignment of each entry in the jump table.

Definition at line 710 of file MachineFunction.cpp.

References EK_BlockAddress, EK_Custom32, EK_GPRel32BlockAddress, EK_GPRel64BlockAddress, EK_Inline, EK_LabelDifference32, llvm::DataLayout::getABIIntegerTypeAlignment(), getEntryKind(), llvm::DataLayout::getPointerABIAlignment(), and llvm_unreachable.

Referenced by llvm::AsmPrinter::EmitJumpTableInfo().

JTEntryKind llvm::MachineJumpTableInfo::getEntryKind ( ) const

inline

Definition at line 84 of file MachineJumpTableInfo.h.

Referenced by llvm::AsmPrinter::EmitJumpTableInfo(), getEntryAlignment(), and getEntrySize().

unsigned MachineJumpTableInfo::getEntrySize

(

const DataLayout &

TD

)

const

getEntrySize - Return the size of each entry in the jump table.

Definition at line 691 of file MachineFunction.cpp.

References EK_BlockAddress, EK_Custom32, EK_GPRel32BlockAddress, EK_GPRel64BlockAddress, EK_Inline, EK_LabelDifference32, getEntryKind(), llvm::DataLayout::getPointerSize(), and llvm_unreachable.

const std::vector<MachineJumpTableEntry>& llvm::MachineJumpTableInfo::getJumpTables ( ) const

inline

Definition at line 99 of file MachineJumpTableInfo.h.

Referenced by llvm::ARMAsmPrinter::EmitJump2Table(), llvm::ARMAsmPrinter::EmitJumpTable(), llvm::AsmPrinter::EmitJumpTableInfo(), llvm::ARMBaseInstrInfo::GetInstSizeInBytes(), llvm::HexagonTargetLowering::LowerBR_JT(), and llvm::BranchFolder::OptimizeFunction().

bool llvm::MachineJumpTableInfo::isEmpty ( ) const

inline

isEmpty - Return true if there are no jump tables.

Definition at line 97 of file MachineJumpTableInfo.h.

void MachineJumpTableInfo::print

(

raw_ostream &

OS

)

const

print - Used by the MachineFunction printer to print information about jump tables. Implemented in MachineFunction.cpp

Definition at line 765 of file MachineFunction.cpp.

Referenced by dump(), and llvm::MachineFunction::print().

void llvm::MachineJumpTableInfo::RemoveJumpTable ( unsigned  Idx )

inline

RemoveJumpTable - Mark the specific index as being dead. This will prevent it from being emitted.

Definition at line 105 of file MachineJumpTableInfo.h.

Referenced by llvm::BranchFolder::OptimizeFunction().

bool MachineJumpTableInfo::ReplaceMBBInJumpTable	(	unsigned	Idx,
		MachineBasicBlock *	Old,
		MachineBasicBlock *	New
	)

ReplaceMBBInJumpTable - If Old is a target of the jump tables, update the jump table to branch to New instead.

Definition at line 751 of file MachineFunction.cpp.

References llvm::MachineJumpTableEntry::MBBs.

Referenced by ReplaceMBBInJumpTables().

bool MachineJumpTableInfo::ReplaceMBBInJumpTables	(	MachineBasicBlock *	Old,
		MachineBasicBlock *	New
	)

ReplaceMBBInJumpTables - If Old is the target of any jump tables, update the jump tables to branch to New instead.

Definition at line 740 of file MachineFunction.cpp.

References ReplaceMBBInJumpTable().

---

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

• MachineJumpTableInfo.h
• MachineFunction.cpp