LLVM  6.0.0svn
Public Types | Public Member Functions | List of all members
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

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 868 of file MachineFunction.cpp.

References assert().

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

◆ dump()

LLVM_DUMP_METHOD void MachineJumpTableInfo::dump ( ) const

dump - Call to stderr.

Definition at line 917 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 848 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

◆ 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 829 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

◆ 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 902 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 888 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 877 of file MachineFunction.cpp.

References assert().


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