LLVM 19.0.0git
Public Types | Public Member Functions | Static Public Member Functions | List of all members
llvm::MCCFIInstruction Class Reference

#include "llvm/MC/MCDwarf.h"

Public Types

enum  OpType : uint8_t {
  OpSameValue , OpRememberState , OpRestoreState , OpOffset ,
  OpLLVMDefAspaceCfa , OpDefCfaRegister , OpDefCfaOffset , OpDefCfa ,
  OpRelOffset , OpAdjustCfaOffset , OpEscape , OpRestore ,
  OpUndefined , OpRegister , OpWindowSave , OpNegateRAState ,
  OpGnuArgsSize , OpLabel
}
 

Public Member Functions

OpType getOperation () const
 
MCSymbol * getLabel () const
 
unsigned getRegister () const
 
unsigned getRegister2 () const
 
unsigned getAddressSpace () const
 
int getOffset () const
 
MCSymbol * getCfiLabel () const
 
StringRef getValues () const
 
StringRef getComment () const
 
SMLoc getLoc () const
 

Static Public Member Functions

static MCCFIInstruction cfiDefCfa (MCSymbol *L, unsigned Register, int Offset, SMLoc Loc={})
 .cfi_def_cfa defines a rule for computing CFA as: take address from Register and add Offset to it.
 
static MCCFIInstruction createDefCfaRegister (MCSymbol *L, unsigned Register, SMLoc Loc={})
 .cfi_def_cfa_register modifies a rule for computing CFA.
 
static MCCFIInstruction cfiDefCfaOffset (MCSymbol *L, int Offset, SMLoc Loc={})
 .cfi_def_cfa_offset modifies a rule for computing CFA.
 
static MCCFIInstruction createAdjustCfaOffset (MCSymbol *L, int Adjustment, SMLoc Loc={})
 .cfi_adjust_cfa_offset Same as .cfi_def_cfa_offset, but Offset is a relative value that is added/subtracted from the previous offset.
 
static MCCFIInstruction createLLVMDefAspaceCfa (MCSymbol *L, unsigned Register, int Offset, unsigned AddressSpace, SMLoc Loc)
 .cfi_llvm_def_aspace_cfa defines the rule for computing the CFA to be the result of evaluating the DWARF operation expression DW_OP_constu AS; DW_OP_aspace_bregx R, B as a location description.
 
static MCCFIInstruction createOffset (MCSymbol *L, unsigned Register, int Offset, SMLoc Loc={})
 .cfi_offset Previous value of Register is saved at offset Offset from CFA.
 
static MCCFIInstruction createRelOffset (MCSymbol *L, unsigned Register, int Offset, SMLoc Loc={})
 .cfi_rel_offset Previous value of Register is saved at offset Offset from the current CFA register.
 
static MCCFIInstruction createRegister (MCSymbol *L, unsigned Register1, unsigned Register2, SMLoc Loc={})
 .cfi_register Previous value of Register1 is saved in register Register2.
 
static MCCFIInstruction createWindowSave (MCSymbol *L, SMLoc Loc={})
 .cfi_window_save SPARC register window is saved.
 
static MCCFIInstruction createNegateRAState (MCSymbol *L, SMLoc Loc={})
 .cfi_negate_ra_state AArch64 negate RA state.
 
static MCCFIInstruction createRestore (MCSymbol *L, unsigned Register, SMLoc Loc={})
 .cfi_restore says that the rule for Register is now the same as it was at the beginning of the function, after all initial instructions added by .cfi_startproc were executed.
 
static MCCFIInstruction createUndefined (MCSymbol *L, unsigned Register, SMLoc Loc={})
 .cfi_undefined From now on the previous value of Register can't be restored anymore.
 
static MCCFIInstruction createSameValue (MCSymbol *L, unsigned Register, SMLoc Loc={})
 .cfi_same_value Current value of Register is the same as in the previous frame.
 
static MCCFIInstruction createRememberState (MCSymbol *L, SMLoc Loc={})
 .cfi_remember_state Save all current rules for all registers.
 
static MCCFIInstruction createRestoreState (MCSymbol *L, SMLoc Loc={})
 .cfi_restore_state Restore the previously saved state.
 
static MCCFIInstruction createEscape (MCSymbol *L, StringRef Vals, SMLoc Loc={}, StringRef Comment="")
 .cfi_escape Allows the user to add arbitrary bytes to the unwind info.
 
static MCCFIInstruction createGnuArgsSize (MCSymbol *L, int Size, SMLoc Loc={})
 A special wrapper for .cfi_escape that indicates GNU_ARGS_SIZE.
 
static MCCFIInstruction createLabel (MCSymbol *L, MCSymbol *CfiLabel, SMLoc Loc)
 

Detailed Description

Definition at line 484 of file MCDwarf.h.

Member Enumeration Documentation

◆ OpType

enum llvm::MCCFIInstruction::OpType : uint8_t
Enumerator
OpSameValue 
OpRememberState 
OpRestoreState 
OpOffset 
OpLLVMDefAspaceCfa 
OpDefCfaRegister 
OpDefCfaOffset 
OpDefCfa 
OpRelOffset 
OpAdjustCfaOffset 
OpEscape 
OpRestore 
OpUndefined 
OpRegister 
OpWindowSave 
OpNegateRAState 
OpGnuArgsSize 
OpLabel 

Definition at line 486 of file MCDwarf.h.

Member Function Documentation

◆ cfiDefCfa()

static MCCFIInstruction llvm::MCCFIInstruction::cfiDefCfa ( MCSymbol *  L,
unsigned  Register,
int  Offset,
SMLoc  Loc = {} 
)
inlinestatic

.cfi_def_cfa defines a rule for computing CFA as: take address from Register and add Offset to it.

Definition at line 558 of file MCDwarf.h.

Referenced by createAArch64MCAsmInfo(), createARCMCAsmInfo(), createARMMCAsmInfo(), createCSKYMCAsmInfo(), llvm::createDefCFA(), createHexagonMCAsmInfo(), createLoongArchMCAsmInfo(), createM68kMCAsmInfo(), createMSP430MCAsmInfo(), createPPCMCAsmInfo(), createRISCVMCAsmInfo(), createSparcMCAsmInfo(), createSparcV9MCAsmInfo(), createSystemZMCAsmInfo(), createVEMCAsmInfo(), createX86MCAsmInfo(), createXCoreMCAsmInfo(), llvm::MCStreamer::emitCFIDefCfa(), emitDefineCFAWithFP(), llvm::AArch64FrameLowering::emitEpilogue(), llvm::MSP430FrameLowering::emitEpilogue(), llvm::X86FrameLowering::emitEpilogue(), llvm::ARMFrameLowering::emitPrologue(), llvm::Thumb1FrameLowering::emitPrologue(), llvm::LoongArchFrameLowering::emitPrologue(), llvm::RISCVFrameLowering::emitPrologue(), llvm::X86FrameLowering::emitPrologue(), llvm::PPCFrameLowering::inlineStackProbe(), and llvm::AArch64FrameLowering::resetCFIToInitialState().

◆ cfiDefCfaOffset()

static MCCFIInstruction llvm::MCCFIInstruction::cfiDefCfaOffset ( MCSymbol *  L,
int  Offset,
SMLoc  Loc = {} 
)
inlinestatic

.cfi_def_cfa_offset modifies a rule for computing CFA.

Register remains the same, but offset is new. Note that it is the absolute offset that will be added to a defined register to the compute CFA address.

Definition at line 573 of file MCDwarf.h.

Referenced by llvm::ARMFrameLowering::adjustForSegmentedStacks(), buildCFAOffs(), llvm::AArch64InstrInfo::buildOutlinedFrame(), convertCalleeSaveRestoreToSPPrePostIncDec(), llvm::createDefCFA(), llvm::MCStreamer::emitCFIDefCfaOffset(), EmitDefCfaOffset(), llvm::MSP430FrameLowering::emitEpilogue(), llvm::X86FrameLowering::emitEpilogue(), llvm::XtensaFrameLowering::emitPrologue(), llvm::AArch64FrameLowering::emitPrologue(), llvm::ARCFrameLowering::emitPrologue(), llvm::Thumb1FrameLowering::emitPrologue(), llvm::CSKYFrameLowering::emitPrologue(), llvm::LoongArchFrameLowering::emitPrologue(), llvm::M68kFrameLowering::emitPrologue(), llvm::Mips16FrameLowering::emitPrologue(), llvm::MipsSEFrameLowering::emitPrologue(), llvm::MSP430FrameLowering::emitPrologue(), llvm::PPCFrameLowering::emitPrologue(), llvm::RISCVFrameLowering::emitPrologue(), and llvm::X86FrameLowering::emitPrologue().

◆ createAdjustCfaOffset()

static MCCFIInstruction llvm::MCCFIInstruction::createAdjustCfaOffset ( MCSymbol *  L,
int  Adjustment,
SMLoc  Loc = {} 
)
inlinestatic

.cfi_adjust_cfa_offset Same as .cfi_def_cfa_offset, but Offset is a relative value that is added/subtracted from the previous offset.

Definition at line 581 of file MCDwarf.h.

Referenced by llvm::MSP430FrameLowering::eliminateCallFramePseudoInstr(), llvm::M68kFrameLowering::eliminateCallFramePseudoInstr(), llvm::X86FrameLowering::eliminateCallFramePseudoInstr(), llvm::MCStreamer::emitCFIAdjustCfaOffset(), and ExpandMOVImmSExti8().

◆ createDefCfaRegister()

static MCCFIInstruction llvm::MCCFIInstruction::createDefCfaRegister ( MCSymbol *  L,
unsigned  Register,
SMLoc  Loc = {} 
)
inlinestatic

.cfi_def_cfa_register modifies a rule for computing CFA.

From now on Register will be used instead of the old one. Offset remains the same.

Definition at line 565 of file MCDwarf.h.

Referenced by buildDefCFAReg(), createMipsMCAsmInfo(), llvm::MCStreamer::emitCFIDefCfaRegister(), EmitDefCfaRegister(), llvm::XtensaFrameLowering::emitPrologue(), llvm::ARMFrameLowering::emitPrologue(), llvm::Thumb1FrameLowering::emitPrologue(), llvm::CSKYFrameLowering::emitPrologue(), llvm::M68kFrameLowering::emitPrologue(), llvm::MipsSEFrameLowering::emitPrologue(), llvm::MSP430FrameLowering::emitPrologue(), llvm::PPCFrameLowering::emitPrologue(), llvm::SparcFrameLowering::emitPrologue(), llvm::X86FrameLowering::emitPrologue(), and llvm::PPCFrameLowering::inlineStackProbe().

◆ createEscape()

static MCCFIInstruction llvm::MCCFIInstruction::createEscape ( MCSymbol *  L,
StringRef  Vals,
SMLoc  Loc = {},
StringRef  Comment = "" 
)
inlinestatic

.cfi_escape Allows the user to add arbitrary bytes to the unwind info.

Definition at line 664 of file MCDwarf.h.

Referenced by llvm::createCFAOffset(), createDefCFAExpression(), createDefCFAOffset(), llvm::X86FrameLowering::emitCalleeSavedFrameMoves(), llvm::MCStreamer::emitCFIEscape(), llvm::X86FrameLowering::emitPrologue(), emitSCSPrologue(), and emitShadowCallStackPrologue().

◆ createGnuArgsSize()

static MCCFIInstruction llvm::MCCFIInstruction::createGnuArgsSize ( MCSymbol *  L,
int  Size,
SMLoc  Loc = {} 
)
inlinestatic

A special wrapper for .cfi_escape that indicates GNU_ARGS_SIZE.

Definition at line 670 of file MCDwarf.h.

Referenced by llvm::M68kFrameLowering::eliminateCallFramePseudoInstr(), llvm::X86FrameLowering::eliminateCallFramePseudoInstr(), and llvm::MCStreamer::emitCFIGnuArgsSize().

◆ createLabel()

static MCCFIInstruction llvm::MCCFIInstruction::createLabel ( MCSymbol *  L,
MCSymbol *  CfiLabel,
SMLoc  Loc 
)
inlinestatic

Definition at line 675 of file MCDwarf.h.

References CfiLabel, and OpLabel.

Referenced by llvm::MCStreamer::emitCFILabelDirective().

◆ createLLVMDefAspaceCfa()

static MCCFIInstruction llvm::MCCFIInstruction::createLLVMDefAspaceCfa ( MCSymbol *  L,
unsigned  Register,
int  Offset,
unsigned  AddressSpace,
SMLoc  Loc 
)
inlinestatic

.cfi_llvm_def_aspace_cfa defines the rule for computing the CFA to be the result of evaluating the DWARF operation expression DW_OP_constu AS; DW_OP_aspace_bregx R, B as a location description.

Definition at line 590 of file MCDwarf.h.

References Offset, and OpLLVMDefAspaceCfa.

Referenced by llvm::MCStreamer::emitCFILLVMDefAspaceCfa().

◆ createNegateRAState()

static MCCFIInstruction llvm::MCCFIInstruction::createNegateRAState ( MCSymbol *  L,
SMLoc  Loc = {} 
)
inlinestatic

.cfi_negate_ra_state AArch64 negate RA state.

Definition at line 626 of file MCDwarf.h.

Referenced by llvm::MCStreamer::emitCFINegateRAState(), and llvm::AArch64FrameLowering::resetCFIToInitialState().

◆ createOffset()

static MCCFIInstruction llvm::MCCFIInstruction::createOffset ( MCSymbol *  L,
unsigned  Register,
int  Offset,
SMLoc  Loc = {} 
)
inlinestatic

.cfi_offset Previous value of Register is saved at offset Offset from CFA.

Definition at line 600 of file MCDwarf.h.

Referenced by llvm::ARMFrameLowering::adjustForSegmentedStacks(), llvm::AArch64InstrInfo::buildOutlinedFrame(), llvm::createCFAOffset(), createM68kMCAsmInfo(), createMSP430MCAsmInfo(), createX86MCAsmInfo(), llvm::MSP430FrameLowering::emitCalleeSavedFrameMoves(), llvm::X86FrameLowering::emitCalleeSavedFrameMoves(), llvm::X86FrameLowering::emitCalleeSavedFrameMovesFullCFA(), llvm::MCStreamer::emitCFIOffset(), EmitCfiOffset(), llvm::XtensaFrameLowering::emitPrologue(), llvm::ARCFrameLowering::emitPrologue(), llvm::ARMFrameLowering::emitPrologue(), llvm::Thumb1FrameLowering::emitPrologue(), llvm::CSKYFrameLowering::emitPrologue(), llvm::LoongArchFrameLowering::emitPrologue(), llvm::M68kFrameLowering::emitPrologue(), llvm::Mips16FrameLowering::emitPrologue(), llvm::MipsSEFrameLowering::emitPrologue(), llvm::MSP430FrameLowering::emitPrologue(), llvm::PPCFrameLowering::emitPrologue(), llvm::RISCVFrameLowering::emitPrologue(), llvm::SystemZELFFrameLowering::emitPrologue(), llvm::X86FrameLowering::emitPrologue(), and emitVGSaveRestore().

◆ createRegister()

static MCCFIInstruction llvm::MCCFIInstruction::createRegister ( MCSymbol *  L,
unsigned  Register1,
unsigned  Register2,
SMLoc  Loc = {} 
)
inlinestatic

.cfi_register Previous value of Register1 is saved in register Register2.

Definition at line 615 of file MCDwarf.h.

Referenced by llvm::MCStreamer::emitCFIRegister(), llvm::PPCFrameLowering::emitPrologue(), and llvm::SparcFrameLowering::emitPrologue().

◆ createRelOffset()

static MCCFIInstruction llvm::MCCFIInstruction::createRelOffset ( MCSymbol *  L,
unsigned  Register,
int  Offset,
SMLoc  Loc = {} 
)
inlinestatic

.cfi_rel_offset Previous value of Register is saved at offset Offset from the current CFA register.

This is transformed to .cfi_offset using the known displacement of the CFA register from the CFA.

Definition at line 608 of file MCDwarf.h.

Referenced by llvm::MCStreamer::emitCFIRelOffset().

◆ createRememberState()

static MCCFIInstruction llvm::MCCFIInstruction::createRememberState ( MCSymbol *  L,
SMLoc  Loc = {} 
)
inlinestatic

.cfi_remember_state Save all current rules for all registers.

Definition at line 653 of file MCDwarf.h.

Referenced by llvm::MCStreamer::emitCFIRememberState(), and llvm::CFIFixup::runOnMachineFunction().

◆ createRestore()

static MCCFIInstruction llvm::MCCFIInstruction::createRestore ( MCSymbol *  L,
unsigned  Register,
SMLoc  Loc = {} 
)
inlinestatic

.cfi_restore says that the rule for Register is now the same as it was at the beginning of the function, after all initial instructions added by .cfi_startproc were executed.

Definition at line 633 of file MCDwarf.h.

Referenced by llvm::MSP430FrameLowering::emitCalleeSavedFrameMoves(), llvm::X86FrameLowering::emitCalleeSavedFrameMoves(), emitCalleeSavedRestores(), llvm::MCStreamer::emitCFIRestore(), llvm::MSP430FrameLowering::emitEpilogue(), llvm::X86FrameLowering::emitEpilogue(), emitSCSEpilogue(), emitShadowCallStackEpilogue(), and emitVGSaveRestore().

◆ createRestoreState()

static MCCFIInstruction llvm::MCCFIInstruction::createRestoreState ( MCSymbol *  L,
SMLoc  Loc = {} 
)
inlinestatic

.cfi_restore_state Restore the previously saved state.

Definition at line 658 of file MCDwarf.h.

Referenced by llvm::MCStreamer::emitCFIRestoreState(), and llvm::CFIFixup::runOnMachineFunction().

◆ createSameValue()

static MCCFIInstruction llvm::MCCFIInstruction::createSameValue ( MCSymbol *  L,
unsigned  Register,
SMLoc  Loc = {} 
)
inlinestatic

.cfi_same_value Current value of Register is the same as in the previous frame.

I.e., no restoration is needed.

Definition at line 647 of file MCDwarf.h.

Referenced by llvm::ARMFrameLowering::adjustForSegmentedStacks(), llvm::MCStreamer::emitCFISameValue(), and insertCFISameValue().

◆ createUndefined()

static MCCFIInstruction llvm::MCCFIInstruction::createUndefined ( MCSymbol *  L,
unsigned  Register,
SMLoc  Loc = {} 
)
inlinestatic

.cfi_undefined From now on the previous value of Register can't be restored anymore.

Definition at line 640 of file MCDwarf.h.

Referenced by llvm::MCStreamer::emitCFIUndefined().

◆ createWindowSave()

static MCCFIInstruction llvm::MCCFIInstruction::createWindowSave ( MCSymbol *  L,
SMLoc  Loc = {} 
)
inlinestatic

.cfi_window_save SPARC register window is saved.

Definition at line 621 of file MCDwarf.h.

Referenced by llvm::MCStreamer::emitCFIWindowSave(), and llvm::SparcFrameLowering::emitPrologue().

◆ getAddressSpace()

unsigned llvm::MCCFIInstruction::getAddressSpace ( ) const
inline

Definition at line 700 of file MCDwarf.h.

References assert(), Operation, and OpLLVMDefAspaceCfa.

Referenced by llvm::AsmPrinter::emitCFIInstruction(), and printCFI().

◆ getCfiLabel()

MCSymbol * llvm::MCCFIInstruction::getCfiLabel ( ) const
inline

Definition at line 714 of file MCDwarf.h.

References assert(), Operation, and OpLabel.

◆ getComment()

StringRef llvm::MCCFIInstruction::getComment ( ) const
inline

Definition at line 724 of file MCDwarf.h.

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

◆ getLabel()

MCSymbol * llvm::MCCFIInstruction::getLabel ( ) const
inline

Definition at line 681 of file MCDwarf.h.

Referenced by printCFI().

◆ getLoc()

SMLoc llvm::MCCFIInstruction::getLoc ( ) const
inline

Definition at line 725 of file MCDwarf.h.

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

◆ getOffset()

int llvm::MCCFIInstruction::getOffset ( ) const
inline

Definition at line 705 of file MCDwarf.h.

References assert(), OpAdjustCfaOffset, OpDefCfa, OpDefCfaOffset, Operation, OpGnuArgsSize, OpLLVMDefAspaceCfa, OpOffset, and OpRelOffset.

Referenced by llvm::AsmPrinter::emitCFIInstruction(), and printCFI().

◆ getOperation()

OpType llvm::MCCFIInstruction::getOperation ( ) const
inline

Definition at line 680 of file MCDwarf.h.

References Operation.

Referenced by llvm::X86FrameLowering::BuildCFI(), llvm::AsmPrinter::emitCFIInstruction(), maybeMoveCFI(), llvm::X86FrameLowering::mergeSPUpdates(), and printCFI().

◆ getRegister()

unsigned llvm::MCCFIInstruction::getRegister ( ) const
inline

Definition at line 683 of file MCDwarf.h.

References assert(), OpDefCfa, OpDefCfaRegister, Operation, OpLLVMDefAspaceCfa, OpOffset, OpRegister, OpRelOffset, OpRestore, OpSameValue, and OpUndefined.

Referenced by llvm::AsmPrinter::emitCFIInstruction(), and printCFI().

◆ getRegister2()

unsigned llvm::MCCFIInstruction::getRegister2 ( ) const
inline

Definition at line 695 of file MCDwarf.h.

References assert(), Operation, and OpRegister.

Referenced by llvm::AsmPrinter::emitCFIInstruction(), and printCFI().

◆ getValues()

StringRef llvm::MCCFIInstruction::getValues ( ) const
inline

Definition at line 719 of file MCDwarf.h.

References assert(), Operation, and OpEscape.

Referenced by llvm::AsmPrinter::emitCFIInstruction(), and printCFI().

Member Data Documentation

◆ AddressSpace

unsigned llvm::MCCFIInstruction::AddressSpace

Definition at line 517 of file MCDwarf.h.

◆ CfiLabel

MCSymbol* llvm::MCCFIInstruction::CfiLabel

Definition at line 523 of file MCDwarf.h.

Referenced by createLabel().

◆ Offset

int llvm::MCCFIInstruction::Offset

Definition at line 512 of file MCDwarf.h.

Referenced by createLLVMDefAspaceCfa().

◆ Register

unsigned llvm::MCCFIInstruction::Register

Definition at line 511 of file MCDwarf.h.

◆ Register2

unsigned llvm::MCCFIInstruction::Register2

Definition at line 521 of file MCDwarf.h.

◆ 

struct { ... } llvm::MCCFIInstruction::RI

◆ 

struct { ... } llvm::MCCFIInstruction::RIA

◆ 

struct { ... } llvm::MCCFIInstruction::RR
The documentation for this class was generated from the following file:
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