llvm::MachineJumpTableInfo Class Reference

#include "llvm/CodeGen/MachineJumpTableInfo.h"

Public Types
enum	JTEntryKind {   EK_BlockAddress, EK_GPRel64BlockAddress, EK_GPRel32BlockAddress, EK_LabelDifference32,   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
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)
	createJumpTableIndex - Create a new jump table. More...
bool	isEmpty () const
	isEmpty - Return true if there are no jump tables. More...
const std::vector< MachineJumpTableEntry > &	getJumpTables () const
void	RemoveJumpTable (unsigned Idx)
	RemoveJumpTable - Mark the specific index as being dead. More...
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. More...
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. More...
void	print (raw_ostream &OS) const
	print - Used by the MachineFunction printer to print information about jump tables. More...
void	dump () const
	dump - Call to stderr. More...

Detailed Description

Definition at line 43 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_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 47 of file MachineJumpTableInfo.h.

Constructor & Destructor Documentation

MachineJumpTableInfo()

llvm::MachineJumpTableInfo::MachineJumpTableInfo ( JTEntryKind  Kind )

inlineexplicit

Definition at line 83 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 851 of file MachineFunction.cpp.

References assert().

Referenced by getRetpolineSymbol(), llvm::MIRParserImpl::initializeJumpTableInfo(), and llvm::ARMTargetLowering::ReplaceNodeResults().

dump()

LLVM_DUMP_METHOD void MachineJumpTableInfo::dump

(

)

const

dump - Call to stderr.

Definition at line 900 of file MachineFunction.cpp.

References llvm::dbgs(), and llvm::MachineFunction::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 831 of file MachineFunction.cpp.

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

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

getEntryKind()

JTEntryKind llvm::MachineJumpTableInfo::getEntryKind ( ) const

inline

Definition at line 85 of file MachineJumpTableInfo.h.

Referenced by llvm::MIRPrinter::convert(), and llvm::AsmPrinter::EmitJumpTableInfo().

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 812 of file MachineFunction.cpp.

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

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

getJumpTables()

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

inline

Definition at line 100 of file MachineJumpTableInfo.h.

Referenced by CallingConvSupported(), llvm::MIRPrinter::convert(), llvm::ARMAsmPrinter::EmitJumpTableAddrs(), llvm::AsmPrinter::EmitJumpTableInfo(), llvm::ARMAsmPrinter::EmitJumpTableInsts(), llvm::ARMAsmPrinter::EmitJumpTableTBInst(), llvm::XCoreTargetLowering::getJumpTableEncoding(), llvm::BranchFolder::OptimizeFunction(), and registerDefinedBetween().

isEmpty()

bool llvm::MachineJumpTableInfo::isEmpty ( ) const

inline

isEmpty - Return true if there are no jump tables.

Definition at line 98 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 885 of file MachineFunction.cpp.

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

Referenced by llvm::MachineFunction::print().

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 106 of file MachineJumpTableInfo.h.

References llvm::dump(), print(), and llvm::printJumpTableEntryReference().

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

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 871 of file MachineFunction.cpp.

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

Referenced by registerDefinedBetween().

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 860 of file MachineFunction.cpp.

References assert().

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

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