Represent a reference to a symbol from inside an expression. More...
#include "llvm/MC/MCExpr.h"
Public Member Functions | |
Accessors | |
| const MCSymbol & | getSymbol () const |
| VariantKind | getKind () const |
| bool | hasSubsectionsViaSymbols () const |
 Public Member Functions inherited from llvm::MCExpr | |
| MCExpr (const MCExpr &)=delete | |
| MCExpr & | operator= (const MCExpr &)=delete |
| ExprKind | getKind () const |
| SMLoc | getLoc () const |
| void | print (raw_ostream &OS, const MCAsmInfo *MAI, bool InParens=false) const |
| void | dump () const |
| bool | evaluateAsAbsolute (int64_t &Res, const MCAsmLayout &Layout, const SectionAddrMap &Addrs) const |
| Try to evaluate the expression to an absolute value. | |
| bool | evaluateAsAbsolute (int64_t &Res) const |
| bool | evaluateAsAbsolute (int64_t &Res, const MCAssembler &Asm) const |
| bool | evaluateAsAbsolute (int64_t &Res, const MCAssembler *Asm) const |
| bool | evaluateAsAbsolute (int64_t &Res, const MCAsmLayout &Layout) const |
| bool | evaluateKnownAbsolute (int64_t &Res, const MCAsmLayout &Layout) const |
| bool | evaluateAsRelocatable (MCValue &Res, const MCAsmLayout *Layout, const MCFixup *Fixup) const |
| Try to evaluate the expression to a relocatable value, i.e. | |
| bool | evaluateAsValue (MCValue &Res, const MCAsmLayout &Layout) const |
| Try to evaluate the expression to the form (a - b + constant) where neither a nor b are variables. | |
| MCFragment * | findAssociatedFragment () const |
| Find the "associated section" for this expression, which is currently defined as the absolute section for constants, or otherwise the section associated with the first defined symbol in the expression. | |
Static Public Member Functions | |
| static bool | classof (const MCExpr *E) |
Construction | |
| static const MCSymbolRefExpr * | create (const MCSymbol *Symbol, MCContext &Ctx) |
| static const MCSymbolRefExpr * | create (const MCSymbol *Symbol, VariantKind Kind, MCContext &Ctx, SMLoc Loc=SMLoc()) |
| static const MCSymbolRefExpr * | create (StringRef Name, VariantKind Kind, MCContext &Ctx) |
Static Utility Functions | |
| static StringRef | getVariantKindName (VariantKind Kind) |
| static VariantKind | getVariantKindForName (StringRef Name) |
Additional Inherited Members | |
| Protected Member Functions inherited from llvm::MCExpr | |
| MCExpr (ExprKind Kind, SMLoc Loc, unsigned SubclassData=0) | |
| bool | evaluateAsRelocatableImpl (MCValue &Res, const MCAssembler *Asm, const MCAsmLayout *Layout, const MCFixup *Fixup, const SectionAddrMap *Addrs, bool InSet) const |
| unsigned | getSubclassData () const |
Detailed Description
Represent a reference to a symbol from inside an expression.
A symbol reference in an expression may be a use of a label, a use of an assembler variable (defined constant), or constitute an implicit definition of the symbol as external.
Member Enumeration Documentation
◆ VariantKind
Member Function Documentation
◆ classof()
Definition at line 422 of file MCExpr.h.
References E, and llvm::MCExpr::SymbolRef.
◆ create() [1/3]
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inlinestatic |
Definition at line 389 of file MCExpr.h.
References create(), and VK_None.
Referenced by llvm::ConstantPool::addEntry(), llvm::CSKYConstantPool::addEntry(), ARM64EmitRuntimeFunction(), ARM64EmitUnwindInfoForSegment(), ARMEmitRuntimeFunction(), ARMEmitUnwindInfo(), buildSymbolDiff(), computeLabelDiff(), create(), createGOTRelExprOp(), createPCXRelExprOp(), createSparcMCOperand(), createVEMCOperand(), llvm::AsmPrinter::doFinalization(), llvm::AddressPool::emit(), EmitAbsDifference(), llvm::MCStreamer::emitAbsoluteSymbolDiff(), llvm::MCStreamer::emitAbsoluteSymbolDiffAsULEB128(), llvm::AMDGPUTargetELFStreamer::EmitAmdhsaKernelDescriptor(), llvm::TargetLoweringObjectFile::emitCGProfileMetadata(), llvm::MCWinCOFFStreamer::emitCOFFImgRel32(), llvm::MCWinCOFFStreamer::emitCOFFSecRel32(), llvm::MCWinCOFFStreamer::emitCOFFSectionIndex(), llvm::MipsTargetELFStreamer::emitDirectiveCpLoad(), llvm::MipsTargetELFStreamer::emitDirectiveCpsetup(), llvm::MipsTargetELFStreamer::emitDirectiveEnd(), emitDirectiveRelocJalr(), llvm::EHStreamer::emitExceptionTable(), llvm::CodeViewContext::emitFileChecksumOffset(), llvm::WebAssemblyAsmPrinter::EmitFunctionAttributes(), llvm::AsmPrinter::emitFunctionBody(), EmitGenDwarfAranges(), EmitGenDwarfInfo(), emitGenDwarfRanges(), llvm::AMDGPUTargetELFStreamer::EmitHSAMetadata(), llvm::ARMAsmPrinter::emitInstruction(), llvm::SystemZAsmPrinter::emitInstruction(), llvm::X86AsmPrinter::emitInstruction(), llvm::AMDGPUTargetELFStreamer::EmitISAVersion(), llvm::ARMAsmPrinter::emitJumpTableAddrs(), llvm::AsmPrinter::emitJumpTableInfo(), llvm::ARMAsmPrinter::emitJumpTableInsts(), llvm::ARMAsmPrinter::emitJumpTableTBInst(), llvm::X86AsmPrinter::emitKCFITypeId(), llvm::AsmPrinter::emitLabelPlusOffset(), llvm::ARMAsmPrinter::emitMachineConstantPoolValue(), llvm::CSKYAsmPrinter::emitMachineConstantPoolValue(), llvm::SystemZAsmPrinter::emitMachineConstantPoolValue(), emitNonLazySymbolPointer(), EmitNop(), llvm::MCObjectStreamer::emitRelocDirective(), EmitRuntimeFunction(), llvm::HexagonAsmPrinter::EmitSled(), llvm::LoongArchAsmPrinter::emitSled(), EmitSymbolRefWithOfs(), llvm::MCStreamer::emitSymbolValue(), EmitUnwindInfo(), llvm::AVRMCELFStreamer::emitValueForModiferKind(), llvm::MCELFStreamer::emitWeakReference(), llvm::MCWasmStreamer::emitWeakReference(), llvm::MCWinCOFFStreamer::emitWeakReference(), llvm::MCXCOFFStreamer::emitXCOFFRefDirective(), llvm::AsmPrinter::emitXRayTable(), llvm::ARMAsmPrinter::emitXXStructor(), llvm::CodeViewContext::encodeDefRange(), llvm::WasmException::endFunction(), llvm::AVRMCExpr::evaluateAsRelocatableImpl(), llvm::PPCMCExpr::evaluateAsRelocatableImpl(), llvm::MCExpr::evaluateAsRelocatableImpl(), llvm::RecordStreamer::flushSymverDirectives(), forceExpAbs(), llvm::TargetLoweringObjectFile::getDebugThreadLocalSymbol(), llvm::ARMElfTargetObjectFile::getDebugThreadLocalSymbol(), llvm::MipsTargetObjectFile::getDebugThreadLocalSymbol(), llvm::X86ELFTargetObjectFile::getDebugThreadLocalSymbol(), llvm::SystemZMCInstLower::getExpr(), llvm::MCAsmInfo::getExprForFDESymbol(), llvm::RISCVMCAsmInfo::getExprForFDESymbol(), llvm::SparcELFMCAsmInfo::getExprForFDESymbol(), llvm::AArch64MCAsmInfoDarwin::getExprForPersonalitySymbol(), llvm::SparcELFMCAsmInfo::getExprForPersonalitySymbol(), llvm::X86_64MCAsmInfoDarwin::getExprForPersonalitySymbol(), getGlobalOffsetTable(), llvm::TargetLoweringObjectFileMachO::getIndirectSymViaGOTPCRel(), llvm::AArch64_MachoTargetObjectFile::getIndirectSymViaGOTPCRel(), llvm::X86_64MachoTargetObjectFile::getIndirectSymViaGOTPCRel(), llvm::ARMElfTargetObjectFile::getIndirectSymViaRWPI(), GetOptionalAbsDifference(), llvm::TargetLowering::getPICJumpTableRelocBaseExpr(), llvm::M68kTargetLowering::getPICJumpTableRelocBaseExpr(), llvm::PPCTargetLowering::getPICJumpTableRelocBaseExpr(), llvm::X86TargetLowering::getPICJumpTableRelocBaseExpr(), GetSubDivExpr(), GetSymbolRef(), getTLSGetOffset(), llvm::TargetLoweringObjectFile::getTTypeGlobalReference(), llvm::TargetLoweringObjectFileELF::getTTypeGlobalReference(), llvm::TargetLoweringObjectFileMachO::getTTypeGlobalReference(), llvm::AArch64_MachoTargetObjectFile::getTTypeGlobalReference(), llvm::ARMElfTargetObjectFile::getTTypeGlobalReference(), llvm::SparcELFTargetObjectFile::getTTypeGlobalReference(), llvm::X86_64MachoTargetObjectFile::getTTypeGlobalReference(), llvm::TargetLoweringObjectFile::getTTypeReference(), llvm::HexagonLowerToMC(), llvm::HexagonAsmPrinter::HexagonProcessInstruction(), llvm::SIInstrInfo::insertIndirectBranch(), llvm::BPFMCInstLower::Lower(), llvm::LanaiMCInstLower::Lower(), llvm::MSP430MCInstLower::Lower(), llvm::AsmPrinter::lowerConstant(), llvm::AVRAsmPrinter::lowerConstant(), llvm::M68kTargetLowering::LowerCustomJumpTableEntry(), llvm::RISCVTargetLowering::LowerCustomJumpTableEntry(), llvm::VETargetLowering::LowerCustomJumpTableEntry(), llvm::X86TargetLowering::LowerCustomJumpTableEntry(), llvm::TargetLoweringObjectFileELF::lowerDSOLocalEquivalent(), llvm::AVRMCInstLower::lowerInstruction(), llvm::ARMAsmPrinter::lowerOperand(), llvm::AArch64MCInstLower::lowerOperand(), AMDGPUMCInstLower::lowerOperand(), llvm::CSKYMCInstLower::lowerOperand(), llvm::LowerPPCMachineOperandToMCOperand(), llvm::TargetLoweringObjectFileELF::lowerRelativeReference(), llvm::TargetLoweringObjectFileCOFF::lowerRelativeReference(), llvm::TargetLoweringObjectFileWasm::lowerRelativeReference(), LowerSymbolOperand(), llvm::BPFMCInstLower::LowerSymbolOperand(), llvm::CSKYMCInstLower::lowerSymbolOperand(), llvm::LanaiMCInstLower::LowerSymbolOperand(), llvm::M68kMCInstLower::LowerSymbolOperand(), llvm::MSP430MCInstLower::LowerSymbolOperand(), lowerSymbolOperand(), llvm::AVRMCInstLower::lowerSymbolOperand(), llvm::AArch64MCInstLower::lowerSymbolOperandCOFF(), llvm::AArch64MCInstLower::lowerSymbolOperandELF(), llvm::AArch64MCInstLower::lowerSymbolOperandMachO(), makeEndMinusStartExpr(), makeStartPlusIntExpr(), llvm::MCAsmParserExtension::ParseDirectiveCGProfile(), llvm::FaultMaps::recordFaultingOp(), llvm::AMDGPUSymbolizer::tryAddingSymbolicOperand(), llvm::MCExternalSymbolizer::tryAddingSymbolicOperand(), and llvm::AArch64ExternalSymbolizer::tryAddingSymbolicOperand().
◆ create() [2/3]
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Definition at line 210 of file MCExpr.cpp.
References llvm::MCContext::getAsmInfo(), and Sym.
◆ create() [3/3]
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static |
Definition at line 216 of file MCExpr.cpp.
References create(), llvm::MCContext::getOrCreateSymbol(), and Name.
◆ getKind()
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inline |
Definition at line 404 of file MCExpr.h.
References llvm::MCExpr::getSubclassData().
Referenced by llvm::MCExpr::evaluateAsRelocatableImpl(), fixELFSymbolsInTLSFixupsImpl(), llvm::PPCMCCodeEmitter::getDispRI34PCRelEncoding(), llvm::PPCMCCodeEmitter::getTLSRegEncoding(), llvm::isPartOfGOTToPCRelPair(), needsExpandMemInst(), optimizeToShortImmediateForm(), llvm::MCExpr::print(), printExpr(), llvm::PPCInstPrinter::printInst(), llvm::PPCInstPrinter::printTLSCall(), and shouldBeSls().
◆ getSymbol()
Definition at line 402 of file MCExpr.h.
Referenced by llvm::ConstantPool::addEntry(), llvm::MCWinCOFFStreamer::emitCGProfileEntry(), llvm::MCObjectStreamer::emitRelocDirective(), llvm::MCExpr::evaluateAsRelocatableImpl(), EvaluateCRExpr(), llvm::MCWinCOFFStreamer::finalizeCGProfileEntry(), llvm::MCExpr::findAssociatedFragment(), fixELFSymbolsInTLSFixupsImpl(), llvm::MCAsmLayout::getBaseSymbol(), llvm::TargetLoweringObjectFileMachO::getIndirectSymViaGOTPCRel(), getOffsetAndDataFragment(), llvm::RISCVMCExpr::getPCRelHiFixup(), handleIndirectSymViaGOTPCRel(), hasGOTReference(), llvm::MCExpr::print(), printExpr(), llvm::PPCInstPrinter::printInst(), llvm::PPCInstPrinter::printTLSCall(), llvm::WebAssemblyAsmTypeCheck::typeCheck(), and llvm::MachObjectWriter::writeObject().
◆ getVariantKindForName()
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static |
Definition at line 394 of file MCExpr.cpp.
References llvm::StringSwitch< T, R >::Case(), llvm::StringSwitch< T, R >::Default(), Name, VK_AMDGPU_ABS32_HI, VK_AMDGPU_ABS32_LO, VK_AMDGPU_GOTPCREL32_HI, VK_AMDGPU_GOTPCREL32_LO, VK_AMDGPU_REL32_HI, VK_AMDGPU_REL32_LO, VK_AMDGPU_REL64, VK_ARM_GOT_PREL, VK_ARM_NONE, VK_ARM_PREL31, VK_ARM_SBREL, VK_ARM_TARGET1, VK_ARM_TARGET2, VK_ARM_TLSLDO, VK_AVR_HI8, VK_AVR_HLO8, VK_AVR_LO8, VK_COFF_IMGREL32, VK_DTPOFF, VK_DTPREL, VK_GOT, VK_GOTNTPOFF, VK_GOTOFF, VK_GOTPAGE, VK_GOTPAGEOFF, VK_GOTPCREL, VK_GOTPCREL_NORELAX, VK_GOTREL, VK_GOTTPOFF, VK_Hexagon_GD_GOT, VK_Hexagon_GD_PLT, VK_Hexagon_IE, VK_Hexagon_IE_GOT, VK_Hexagon_LD_GOT, VK_Hexagon_LD_PLT, VK_INDNTPOFF, VK_Invalid, VK_NTPOFF, VK_PAGE, VK_PAGEOFF, VK_PCREL, VK_PLT, VK_PPC_DTPMOD, VK_PPC_DTPREL_HA, VK_PPC_DTPREL_HI, VK_PPC_DTPREL_HIGH, VK_PPC_DTPREL_HIGHA, VK_PPC_DTPREL_HIGHER, VK_PPC_DTPREL_HIGHERA, VK_PPC_DTPREL_HIGHEST, VK_PPC_DTPREL_HIGHESTA, VK_PPC_DTPREL_LO, VK_PPC_GOT_DTPREL, VK_PPC_GOT_DTPREL_HA, VK_PPC_GOT_DTPREL_HI, VK_PPC_GOT_DTPREL_LO, VK_PPC_GOT_HA, VK_PPC_GOT_HI, VK_PPC_GOT_LO, VK_PPC_GOT_PCREL, VK_PPC_GOT_TLSGD, VK_PPC_GOT_TLSGD_HA, VK_PPC_GOT_TLSGD_HI, VK_PPC_GOT_TLSGD_LO, VK_PPC_GOT_TLSGD_PCREL, VK_PPC_GOT_TLSLD, VK_PPC_GOT_TLSLD_HA, VK_PPC_GOT_TLSLD_HI, VK_PPC_GOT_TLSLD_LO, VK_PPC_GOT_TLSLD_PCREL, VK_PPC_GOT_TPREL, VK_PPC_GOT_TPREL_HA, VK_PPC_GOT_TPREL_HI, VK_PPC_GOT_TPREL_LO, VK_PPC_GOT_TPREL_PCREL, VK_PPC_HA, VK_PPC_HI, VK_PPC_HIGH, VK_PPC_HIGHA, VK_PPC_HIGHER, VK_PPC_HIGHERA, VK_PPC_HIGHEST, VK_PPC_HIGHESTA, VK_PPC_L, VK_PPC_LO, VK_PPC_LOCAL, VK_PPC_NOTOC, VK_PPC_TLS, VK_PPC_TLS_PCREL, VK_PPC_TOC, VK_PPC_TOC_HA, VK_PPC_TOC_HI, VK_PPC_TOC_LO, VK_PPC_TOCBASE, VK_PPC_TPREL_HA, VK_PPC_TPREL_HI, VK_PPC_TPREL_HIGH, VK_PPC_TPREL_HIGHA, VK_PPC_TPREL_HIGHER, VK_PPC_TPREL_HIGHERA, VK_PPC_TPREL_HIGHEST, VK_PPC_TPREL_HIGHESTA, VK_PPC_TPREL_LO, VK_PPC_U, VK_SECREL, VK_SIZE, VK_TLSCALL, VK_TLSDESC, VK_TLSGD, VK_TLSLD, VK_TLSLDM, VK_TLVP, VK_TLVPPAGE, VK_TLVPPAGEOFF, VK_TPOFF, VK_TPREL, VK_VE_GOT_HI32, VK_VE_GOT_LO32, VK_VE_GOTOFF_HI32, VK_VE_GOTOFF_LO32, VK_VE_HI32, VK_VE_LO32, VK_VE_PC_HI32, VK_VE_PC_LO32, VK_VE_PLT_HI32, VK_VE_PLT_LO32, VK_VE_TLS_GD_HI32, VK_VE_TLS_GD_LO32, VK_VE_TPOFF_HI32, VK_VE_TPOFF_LO32, VK_WASM_FUNCINDEX, VK_WASM_GOT_TLS, VK_WASM_MBREL, VK_WASM_TBREL, VK_WASM_TLSREL, VK_WASM_TYPEINDEX, VK_X86_ABS8, and VK_X86_PLTOFF.
◆ getVariantKindName()
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Definition at line 221 of file MCExpr.cpp.
References llvm_unreachable, VK_AMDGPU_ABS32_HI, VK_AMDGPU_ABS32_LO, VK_AMDGPU_GOTPCREL32_HI, VK_AMDGPU_GOTPCREL32_LO, VK_AMDGPU_REL32_HI, VK_AMDGPU_REL32_LO, VK_AMDGPU_REL64, VK_ARM_GOT_PREL, VK_ARM_NONE, VK_ARM_PREL31, VK_ARM_SBREL, VK_ARM_TARGET1, VK_ARM_TARGET2, VK_ARM_TLSDESCSEQ, VK_ARM_TLSLDO, VK_AVR_DIFF16, VK_AVR_DIFF32, VK_AVR_DIFF8, VK_AVR_HI8, VK_AVR_HLO8, VK_AVR_LO8, VK_AVR_NONE, VK_AVR_PM, VK_COFF_IMGREL32, VK_DTPOFF, VK_DTPREL, VK_GOT, VK_GOTNTPOFF, VK_GOTOFF, VK_GOTPAGE, VK_GOTPAGEOFF, VK_GOTPCREL, VK_GOTPCREL_NORELAX, VK_GOTREL, VK_GOTTPOFF, VK_Hexagon_GD_GOT, VK_Hexagon_GD_PLT, VK_Hexagon_GPREL, VK_Hexagon_HI16, VK_Hexagon_IE, VK_Hexagon_IE_GOT, VK_Hexagon_LD_GOT, VK_Hexagon_LD_PLT, VK_Hexagon_LO16, VK_INDNTPOFF, VK_Invalid, VK_None, VK_NTPOFF, VK_PAGE, VK_PAGEOFF, VK_PCREL, VK_PLT, VK_PPC_AIX_TLSGD, VK_PPC_AIX_TLSGDM, VK_PPC_AIX_TLSIE, VK_PPC_AIX_TLSLE, VK_PPC_DTPMOD, VK_PPC_DTPREL_HA, VK_PPC_DTPREL_HI, VK_PPC_DTPREL_HIGH, VK_PPC_DTPREL_HIGHA, VK_PPC_DTPREL_HIGHER, VK_PPC_DTPREL_HIGHERA, VK_PPC_DTPREL_HIGHEST, VK_PPC_DTPREL_HIGHESTA, VK_PPC_DTPREL_LO, VK_PPC_GOT_DTPREL, VK_PPC_GOT_DTPREL_HA, VK_PPC_GOT_DTPREL_HI, VK_PPC_GOT_DTPREL_LO, VK_PPC_GOT_HA, VK_PPC_GOT_HI, VK_PPC_GOT_LO, VK_PPC_GOT_PCREL, VK_PPC_GOT_TLSGD, VK_PPC_GOT_TLSGD_HA, VK_PPC_GOT_TLSGD_HI, VK_PPC_GOT_TLSGD_LO, VK_PPC_GOT_TLSGD_PCREL, VK_PPC_GOT_TLSLD, VK_PPC_GOT_TLSLD_HA, VK_PPC_GOT_TLSLD_HI, VK_PPC_GOT_TLSLD_LO, VK_PPC_GOT_TLSLD_PCREL, VK_PPC_GOT_TPREL, VK_PPC_GOT_TPREL_HA, VK_PPC_GOT_TPREL_HI, VK_PPC_GOT_TPREL_LO, VK_PPC_GOT_TPREL_PCREL, VK_PPC_HA, VK_PPC_HI, VK_PPC_HIGH, VK_PPC_HIGHA, VK_PPC_HIGHER, VK_PPC_HIGHERA, VK_PPC_HIGHEST, VK_PPC_HIGHESTA, VK_PPC_L, VK_PPC_LO, VK_PPC_LOCAL, VK_PPC_NOTOC, VK_PPC_PCREL_OPT, VK_PPC_TLS, VK_PPC_TLS_PCREL, VK_PPC_TLSGD, VK_PPC_TLSLD, VK_PPC_TOC, VK_PPC_TOC_HA, VK_PPC_TOC_HI, VK_PPC_TOC_LO, VK_PPC_TOCBASE, VK_PPC_TPREL_HA, VK_PPC_TPREL_HI, VK_PPC_TPREL_HIGH, VK_PPC_TPREL_HIGHA, VK_PPC_TPREL_HIGHER, VK_PPC_TPREL_HIGHERA, VK_PPC_TPREL_HIGHEST, VK_PPC_TPREL_HIGHESTA, VK_PPC_TPREL_LO, VK_PPC_U, VK_SECREL, VK_SIZE, VK_TLSCALL, VK_TLSDESC, VK_TLSGD, VK_TLSLD, VK_TLSLDM, VK_TLVP, VK_TLVPPAGE, VK_TLVPPAGEOFF, VK_TPOFF, VK_TPREL, VK_VE_GOT_HI32, VK_VE_GOT_LO32, VK_VE_GOTOFF_HI32, VK_VE_GOTOFF_LO32, VK_VE_HI32, VK_VE_LO32, VK_VE_PC_HI32, VK_VE_PC_LO32, VK_VE_PLT_HI32, VK_VE_PLT_LO32, VK_VE_TLS_GD_HI32, VK_VE_TLS_GD_LO32, VK_VE_TPOFF_HI32, VK_VE_TPOFF_LO32, VK_WASM_FUNCINDEX, VK_WASM_GOT_TLS, VK_WASM_MBREL, VK_WASM_TBREL, VK_WASM_TLSREL, VK_WASM_TYPEINDEX, VK_WEAKREF, VK_X86_ABS8, and VK_X86_PLTOFF.
Referenced by llvm::MCExpr::print(), and llvm::PPCInstPrinter::printTLSCall().
◆ hasSubsectionsViaSymbols()
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Definition at line 408 of file MCExpr.h.
References llvm::MCExpr::getSubclassData().
Referenced by llvm::MCExpr::evaluateAsRelocatableImpl().
The documentation for this class was generated from the following files:
- include/llvm/MC/MCExpr.h
- lib/MC/MCExpr.cpp
