#include "llvm/CodeGen/MachineJumpTableInfo.h"

Public Types
enum	JTEntryKind { EK_BlockAddress , EK_GPRel64BlockAddress , EK_GPRel32BlockAddress , EK_LabelDifference32 , EK_LabelDifference64 , EK_Inline , EK_Custom32 }
	JTEntryKind - This enum indicates how each entry of the jump table is represented and emitted. More...

Public Member Functions
	MachineJumpTableInfo (JTEntryKind Kind)
JTEntryKind	getEntryKind () const
LLVM_ABI unsigned	getEntrySize (const DataLayout &TD) const
	getEntrySize - Return the size of each entry in the jump table.
LLVM_ABI unsigned	getEntryAlignment (const DataLayout &TD) const
	getEntryAlignment - Return the alignment of each entry in the jump table.
LLVM_ABI unsigned	createJumpTableIndex (const std::vector< MachineBasicBlock * > &DestBBs)
	createJumpTableIndex - Create a new jump table.
bool	isEmpty () const
	isEmpty - Return true if there are no jump tables.
const std::vector< MachineJumpTableEntry > &	getJumpTables () const
LLVM_ABI bool	updateJumpTableEntryHotness (size_t JTI, MachineFunctionDataHotness Hotness)
void	RemoveJumpTable (unsigned Idx)
	RemoveJumpTable - Mark the specific index as being dead.
LLVM_ABI bool	RemoveMBBFromJumpTables (MachineBasicBlock *MBB)
	RemoveMBBFromJumpTables - If MBB is present in any jump tables, remove it.
LLVM_ABI bool	ReplaceMBBInJumpTables (MachineBasicBlock Old, MachineBasicBlock New)
	ReplaceMBBInJumpTables - If Old is the target of any jump tables, update the jump tables to branch to New instead.
LLVM_ABI bool	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.
LLVM_ABI void	print (raw_ostream &OS) const
	print - Used by the MachineFunction printer to print information about jump tables.
LLVM_ABI void	dump () const
	dump - Call to stderr.

Detailed Description

Definition at line 48 of file MachineJumpTableInfo.h.

Member Enumeration Documentation

◆ JTEntryKind

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_LabelDifference64	EK_LabelDifference64 - Each entry is the address of the block minus the address of the jump table. This is used for PIC jump tables where gprel64 is not supported. e.g.: .quad LBB123 - LJTI1_2
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 52 of file MachineJumpTableInfo.h.

Constructor & Destructor Documentation

◆ MachineJumpTableInfo()

llvm::MachineJumpTableInfo::MachineJumpTableInfo ( JTEntryKind Kind )

inlineexplicit

Definition at line 95 of file MachineJumpTableInfo.h.

Member Function Documentation

◆ createJumpTableIndex()

unsigned MachineJumpTableInfo::createJumpTableIndex ( const std::vector< MachineBasicBlock * > & DestBBs )

createJumpTableIndex - Create a new jump table.

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

Definition at line 1379 of file MachineFunction.cpp.

References assert().

Referenced by llvm::SwitchCG::SwitchLowering::buildJumpTable(), llvm::VETargetLowering::emitSjLjDispatchBlock(), and llvm::MIRParserImpl::initializeJumpTableInfo().

◆ dump()

LLVM_DUMP_METHOD void MachineJumpTableInfo::dump ( ) const

dump - Call to stderr.

Definition at line 1452 of file MachineFunction.cpp.

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

◆ getEntryAlignment()

unsigned MachineJumpTableInfo::getEntryAlignment ( const DataLayout & TD ) const

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

Return the alignment of each entry in the jump table.

Definition at line 1358 of file MachineFunction.cpp.

References EK_BlockAddress, EK_Custom32, EK_GPRel32BlockAddress, EK_GPRel64BlockAddress, EK_Inline, EK_LabelDifference32, EK_LabelDifference64, llvm::DataLayout::getABIIntegerTypeAlignment(), getEntryKind(), llvm::DataLayout::getPointerABIAlignment(), llvm_unreachable, and llvm::Align::value().

◆ getEntryKind()

JTEntryKind llvm::MachineJumpTableInfo::getEntryKind ( ) const

inline

Definition at line 97 of file MachineJumpTableInfo.h.

Referenced by convertMJTI(), llvm::AsmPrinter::emitJumpTableEntry(), llvm::BPFAsmPrinter::emitJumpTableInfo(), getEntryAlignment(), and getEntrySize().

◆ getEntrySize()

unsigned MachineJumpTableInfo::getEntrySize ( const DataLayout & TD ) const

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

Return the size of each entry in the jump table.

Definition at line 1338 of file MachineFunction.cpp.

References EK_BlockAddress, EK_Custom32, EK_GPRel32BlockAddress, EK_GPRel64BlockAddress, EK_Inline, EK_LabelDifference32, EK_LabelDifference64, getEntryKind(), llvm::DataLayout::getPointerSize(), and llvm_unreachable.

Referenced by llvm::AsmPrinter::emitJumpTableEntry(), and llvm::BPFAsmPrinter::emitJumpTableInfo().

◆ getJumpTables()

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

inline

Definition at line 113 of file MachineJumpTableInfo.h.

Referenced by convertMJTI(), llvm::ARMAsmPrinter::emitJumpTableAddrs(), llvm::AsmPrinter::emitJumpTableInfo(), llvm::BPFAsmPrinter::emitJumpTableInfo(), llvm::ARMAsmPrinter::emitJumpTableInsts(), llvm::ARMAsmPrinter::emitJumpTableTBInst(), EstimateFunctionSizeInBytes(), jumpTableHasOtherUses(), and llvm::BranchFolder::OptimizeFunction().

◆ isEmpty()

bool llvm::MachineJumpTableInfo::isEmpty ( ) const

inline

isEmpty - Return true if there are no jump tables.

Definition at line 111 of file MachineJumpTableInfo.h.

◆ print()

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 1435 of file MachineFunction.cpp.

References MBB, llvm::printJumpTableEntryReference(), and llvm::printMBBReference().

Referenced by dump().

◆ RemoveJumpTable()

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 124 of file MachineJumpTableInfo.h.

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

◆ RemoveMBBFromJumpTables()

bool MachineJumpTableInfo::RemoveMBBFromJumpTables ( MachineBasicBlock * MBB )

RemoveMBBFromJumpTables - If MBB is present in any jump tables, remove it.

If MBB is present in any jump tables, remove it.

Definition at line 1409 of file MachineFunction.cpp.

References MBB.

◆ ReplaceMBBInJumpTable()

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.

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

Definition at line 1421 of file MachineFunction.cpp.

References assert(), MBB, and llvm::MachineJumpTableEntry::MBBs.

Referenced by ReplaceMBBInJumpTables(), and llvm::MachineBasicBlock::SplitCriticalEdge().

◆ 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.

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

Definition at line 1399 of file MachineFunction.cpp.

References assert(), and ReplaceMBBInJumpTable().

Referenced by GCEmptyBasicBlocks::runOnMachineFunction().

◆ updateJumpTableEntryHotness()

bool MachineJumpTableInfo::updateJumpTableEntryHotness	(	size_t	JTI,
		MachineFunctionDataHotness	Hotness )

Definition at line 1386 of file MachineFunction.cpp.

References assert().

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

include/llvm/CodeGen/MachineJumpTableInfo.h
lib/CodeGen/MachineFunction.cpp

Public Types

Public Member Functions

Detailed Description

Member Enumeration Documentation

◆ JTEntryKind

Constructor & Destructor Documentation

◆ MachineJumpTableInfo()

Member Function Documentation

◆ createJumpTableIndex()

◆ dump()

◆ getEntryAlignment()

◆ getEntryKind()

◆ getEntrySize()

◆ getJumpTables()

◆ isEmpty()

◆ print()

◆ RemoveJumpTable()

◆ RemoveMBBFromJumpTables()

◆ ReplaceMBBInJumpTable()

◆ ReplaceMBBInJumpTables()

◆ updateJumpTableEntryHotness()