#include "llvm/CodeGen/AsmPrinter.h"
#include "CodeViewDebug.h"
#include "DwarfDebug.h"
#include "DwarfException.h"
#include "PseudoProbePrinter.h"
#include "WasmException.h"
#include "WinCFGuard.h"
#include "WinException.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/TinyPtrVector.h"
#include "llvm/ADT/Triple.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Analysis/MemoryLocation.h"
#include "llvm/Analysis/OptimizationRemarkEmitter.h"
#include "llvm/BinaryFormat/COFF.h"
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/BinaryFormat/ELF.h"
#include "llvm/CodeGen/GCMetadata.h"
#include "llvm/CodeGen/GCMetadataPrinter.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBundle.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachineOptimizationRemarkEmitter.h"
#include "llvm/CodeGen/StackMaps.h"
#include "llvm/CodeGen/TargetFrameLowering.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetLowering.h"
#include "llvm/CodeGen/TargetOpcodes.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/Config/config.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Comdat.h"
#include "llvm/IR/Constant.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DebugInfoMetadata.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/EHPersonalities.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GCStrategy.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/GlobalIFunc.h"
#include "llvm/IR/GlobalObject.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Mangler.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Operator.h"
#include "llvm/IR/PseudoProbe.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/Value.h"
#include "llvm/IR/ValueHandle.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDirectives.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCSectionCOFF.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCSymbolELF.h"
#include "llvm/MC/MCTargetOptions.h"
#include "llvm/MC/MCValue.h"
#include "llvm/MC/SectionKind.h"
#include "llvm/Pass.h"
#include "llvm/Remarks/RemarkStreamer.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Timer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include <algorithm>
#include <cassert>
#include <cinttypes>
#include <cstdint>
#include <iterator>
#include <memory>
#include <optional>
#include <string>
#include <utility>
#include <vector>

Classes
class	llvm::AddrLabelMap

Macros
#define	DEBUG_TYPE "asm-printer"

Functions
	STATISTIC (EmittedInsts, "Number of machine instrs printed")

static bool	canBeHidden (const GlobalValue *GV, const MCAsmInfo &MAI)

static void	emitComments (const MachineInstr &MI, raw_ostream &CommentOS)
	emitComments - Pretty-print comments for instructions.

static void	emitKill (const MachineInstr *MI, AsmPrinter &AP)

static bool	emitDebugValueComment (const MachineInstr *MI, AsmPrinter &AP)
	emitDebugValueComment - This method handles the target-independent form of DBG_VALUE, returning true if it was able to do so.

static bool	emitDebugLabelComment (const MachineInstr *MI, AsmPrinter &AP)
	This method handles the target-independent form of DBG_LABEL, returning true if it was able to do so.

static unsigned	getBBAddrMapMetadata (const MachineBasicBlock &MBB)
	Returns the BB metadata to be emitted in the .llvm_bb_addr_map section for a given basic block.

static bool	needFuncLabels (const MachineFunction &MF)
	Returns true if function begin and end labels should be emitted.

static unsigned	getNumGlobalVariableUses (const Constant *C)
	Compute the number of Global Variables that uses a Constant.

static bool	isGOTEquivalentCandidate (const GlobalVariable *GV, unsigned &NumGOTEquivUsers)
	Only consider global GOT equivalents if at least one user is a cstexpr inside an initializer of another global variables.

static void	emitGlobalConstantImpl (const DataLayout &DL, const Constant C, AsmPrinter &AP, const Constant BaseCV=nullptr, uint64_t Offset=0, AsmPrinter::AliasMapTy *AliasList=nullptr)

static void	emitGlobalConstantFP (const ConstantFP *CFP, AsmPrinter &AP)

static void	emitGlobalConstantFP (APFloat APF, Type *ET, AsmPrinter &AP)

static int	isRepeatedByteSequence (const ConstantDataSequential *V)
	isRepeatedByteSequence - Determine whether the given value is composed of a repeated sequence of identical bytes and return the byte value.

static int	isRepeatedByteSequence (const Value *V, const DataLayout &DL)
	isRepeatedByteSequence - Determine whether the given value is composed of a repeated sequence of identical bytes and return the byte value.

static void	emitGlobalAliasInline (AsmPrinter &AP, uint64_t Offset, AsmPrinter::AliasMapTy *AliasList)

static void	emitGlobalConstantDataSequential (const DataLayout &DL, const ConstantDataSequential CDS, AsmPrinter &AP, AsmPrinter::AliasMapTy AliasList)

static void	emitGlobalConstantArray (const DataLayout &DL, const ConstantArray CA, AsmPrinter &AP, const Constant BaseCV, uint64_t Offset, AsmPrinter::AliasMapTy *AliasList)

static void	emitGlobalConstantLargeInt (const ConstantInt *CI, AsmPrinter &AP)

static void	emitGlobalConstantVector (const DataLayout &DL, const ConstantVector CV, AsmPrinter &AP, AsmPrinter::AliasMapTy AliasList)

static void	emitGlobalConstantStruct (const DataLayout &DL, const ConstantStruct CS, AsmPrinter &AP, const Constant BaseCV, uint64_t Offset, AsmPrinter::AliasMapTy *AliasList)

static void	handleIndirectSymViaGOTPCRel (AsmPrinter &AP, const MCExpr *ME, const Constant BaseCst, uint64_t Offset)
	Transform a not absolute MCExpr containing a reference to a GOT equivalent global, by a target specific GOT pc relative access to the final symbol.

static void	PrintParentLoopComment (raw_ostream &OS, const MachineLoop *Loop, unsigned FunctionNumber)
	PrintParentLoopComment - Print comments about parent loops of this one.

static void	PrintChildLoopComment (raw_ostream &OS, const MachineLoop *Loop, unsigned FunctionNumber)
	PrintChildLoopComment - Print comments about child loops within the loop for this basic block, with nesting.

static void	emitBasicBlockLoopComments (const MachineBasicBlock &MBB, const MachineLoopInfo *LI, const AsmPrinter &AP)
	emitBasicBlockLoopComments - Pretty-print comments for basic blocks.

Variables
const char	DWARFGroupName [] = "dwarf"

const char	DWARFGroupDescription [] = "DWARF Emission"

const char	DbgTimerName [] = "emit"

const char	DbgTimerDescription [] = "Debug Info Emission"

const char	EHTimerName [] = "write_exception"

const char	EHTimerDescription [] = "DWARF Exception Writer"

const char	CFGuardName [] = "Control Flow Guard"

const char	CFGuardDescription [] = "Control Flow Guard"

const char	CodeViewLineTablesGroupName [] = "linetables"

const char	CodeViewLineTablesGroupDescription [] = "CodeView Line Tables"

const char	PPTimerName [] = "emit"

const char	PPTimerDescription [] = "Pseudo Probe Emission"

const char	PPGroupName [] = "pseudo probe"

const char	PPGroupDescription [] = "Pseudo Probe Emission"

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "asm-printer"

Definition at line 129 of file AsmPrinter.cpp.

Function Documentation

◆ canBeHidden()

static bool canBeHidden	(	const GlobalValue *	GV,
		const MCAsmInfo &	MAI
	)

static

Definition at line 591 of file AsmPrinter.cpp.

References llvm::GlobalValue::canBeOmittedFromSymbolTable(), and llvm::MCAsmInfo::hasWeakDefCanBeHiddenDirective().

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

◆ emitBasicBlockLoopComments()

static void emitBasicBlockLoopComments	(	const MachineBasicBlock &	MBB,
		const MachineLoopInfo *	LI,
		const AsmPrinter &	AP
	)

static

emitBasicBlockLoopComments - Pretty-print comments for basic blocks.

Definition at line 3631 of file AsmPrinter.cpp.

References assert(), llvm::AsmPrinter::getFunctionNumber(), llvm::LoopBase< BlockT, LoopT >::getHeader(), llvm::LoopBase< BlockT, LoopT >::getLoopDepth(), llvm::MachineLoopInfo::getLoopFor(), llvm::LoopBase< BlockT, LoopT >::getParentLoop(), llvm::raw_ostream::indent(), llvm::LoopBase< BlockT, LoopT >::isInnermost(), MBB, llvm::AsmPrinter::OutStreamer, PrintChildLoopComment(), and PrintParentLoopComment().

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

◆ emitComments()

static void emitComments	(	const MachineInstr &	MI,
		raw_ostream &	CommentOS
	)

static

emitComments - Pretty-print comments for instructions.

Definition at line 1054 of file AsmPrinter.cpp.

References llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineFunction::getSubtarget(), MI, llvm::MachineInstr::ReloadReuse, Size, TII, and llvm::MemoryLocation::UnknownSize.

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

◆ emitDebugLabelComment()

static bool emitDebugLabelComment	(	const MachineInstr *	MI,
		AsmPrinter &	AP
	)

static

This method handles the target-independent form of DBG_LABEL, returning true if it was able to do so.

A false return means the target will need to handle MI in EmitInstruction.

Definition at line 1225 of file AsmPrinter.cpp.

References llvm::DILabel::getName(), llvm::DILocalScope::getNonLexicalBlockFileScope(), llvm::DILabel::getScope(), MI, Name, llvm::AsmPrinter::OutStreamer, and llvm::raw_svector_ostream::str().

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

◆ emitDebugValueComment()

static bool emitDebugValueComment	(	const MachineInstr *	MI,
		AsmPrinter &	AP
	)

static

emitDebugValueComment - This method handles the target-independent form of DBG_VALUE, returning true if it was able to do so.

A false return means the target will need to handle MI in EmitInstruction.

Definition at line 1118 of file AsmPrinter.cpp.

References llvm::APFloat::convert(), llvm::APFloat::convertToDouble(), llvm::DIExpression::convertToNonVariadicExpression(), llvm::DIExpression::expr_ops(), llvm::StackOffset::getFixed(), llvm::TargetFrameLowering::getFrameIndexReference(), llvm::TargetSubtargetInfo::getFrameLowering(), llvm::DIVariable::getName(), llvm::DIExpression::getNumElements(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::DILocalVariable::getScope(), llvm::MachineFunction::getSubtarget(), I, llvm::APFloatBase::IEEEdouble(), ignored(), llvm::Type::isBFloatTy(), llvm::Type::isDoubleTy(), llvm::Type::isFloatTy(), llvm::Type::isHalfTy(), llvm_unreachable, llvm::AsmPrinter::MF, MI, llvm::MachineOperand::MO_CImmediate, llvm::MachineOperand::MO_FPImmediate, llvm::MachineOperand::MO_FrameIndex, llvm::MachineOperand::MO_Immediate, llvm::MachineOperand::MO_Register, llvm::MachineOperand::MO_TargetIndex, Name, llvm::Offset, llvm::dwarf::OperationEncodingString(), llvm::AsmPrinter::OutStreamer, llvm::printReg(), llvm::APFloatBase::rmNearestTiesToEven, and llvm::raw_svector_ostream::str().

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

◆ emitGlobalAliasInline()

static void emitGlobalAliasInline	(	AsmPrinter &	AP,
		uint64_t	Offset,
		AsmPrinter::AliasMapTy *	AliasList
	)

static

Definition at line 3069 of file AsmPrinter.cpp.

References llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::end(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::erase(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::find(), llvm::AsmPrinter::getSymbol(), llvm::Offset, and llvm::AsmPrinter::OutStreamer.

Referenced by emitGlobalConstantDataSequential(), emitGlobalConstantImpl(), and emitGlobalConstantVector().

◆ emitGlobalConstantArray()

static void emitGlobalConstantArray	(	const DataLayout &	DL,
		const ConstantArray *	CA,
		AsmPrinter &	AP,
		const Constant *	BaseCV,
		uint64_t	Offset,
		AsmPrinter::AliasMapTy *	AliasList
	)

static

Definition at line 3124 of file AsmPrinter.cpp.

References DL, E, emitGlobalConstantImpl(), llvm::User::getNumOperands(), llvm::User::getOperand(), llvm::ConstantArray::getType(), llvm::Value::getType(), I, isRepeatedByteSequence(), llvm::Offset, and llvm::AsmPrinter::OutStreamer.

Referenced by emitGlobalConstantImpl().

◆ emitGlobalConstantDataSequential()

static void emitGlobalConstantDataSequential	(	const DataLayout &	DL,
		const ConstantDataSequential *	CDS,
		AsmPrinter &	AP,
		AsmPrinter::AliasMapTy *	AliasList
	)

static

◆ emitGlobalConstantFP() [1/2]

static void emitGlobalConstantFP	(	APFloat	APF,
		Type *	ET,
		AsmPrinter &	AP
	)

static

Definition at line 3215 of file AsmPrinter.cpp.

References assert(), llvm::APFloat::bitcastToAPInt(), DL, llvm::APInt::getBitWidth(), llvm::AsmPrinter::getDataLayout(), llvm::APInt::getNumWords(), llvm::APInt::getRawData(), llvm::DataLayout::isBigEndian(), llvm::Type::isPPC_FP128Ty(), llvm::AsmPrinter::isVerbose(), llvm::AsmPrinter::OutStreamer, llvm::Type::print(), and llvm::APFloat::toString().

◆ emitGlobalConstantFP() [2/2]

static void emitGlobalConstantFP	(	const ConstantFP *	CFP,
		AsmPrinter &	AP
	)

static

Definition at line 3259 of file AsmPrinter.cpp.

References emitGlobalConstantFP(), llvm::Value::getType(), and llvm::ConstantFP::getValueAPF().

Referenced by emitGlobalConstantDataSequential(), emitGlobalConstantFP(), and emitGlobalConstantImpl().

◆ emitGlobalConstantImpl()

static void emitGlobalConstantImpl	(	const DataLayout &	DL,
		const Constant *	C,
		AsmPrinter &	AP,
		const Constant *	BaseCV = `nullptr`,
		uint64_t	Offset = `0`,
		AsmPrinter::AliasMapTy *	AliasList = `nullptr`
	)

static

◆ emitGlobalConstantLargeInt()

static void emitGlobalConstantLargeInt	(	const ConstantInt *	CI,
		AsmPrinter &	AP
	)

static

Definition at line 3263 of file AsmPrinter.cpp.

References llvm::alignTo(), assert(), llvm::BitWidth, DL, llvm::ConstantInt::getBitWidth(), llvm::AsmPrinter::getDataLayout(), llvm::APInt::getRawData(), llvm::ConstantInt::getType(), llvm::DataLayout::getTypeStoreSize(), llvm::ConstantInt::getValue(), llvm::APInt::lshrInPlace(), llvm::AsmPrinter::OutStreamer, and Size.

Referenced by emitGlobalConstantImpl(), and emitGlobalConstantVector().

◆ emitGlobalConstantStruct()

static void emitGlobalConstantStruct	(	const DataLayout &	DL,
		const ConstantStruct *	CS,
		AsmPrinter &	AP,
		const Constant *	BaseCV,
		uint64_t	Offset,
		AsmPrinter::AliasMapTy *	AliasList
	)

static

Definition at line 3184 of file AsmPrinter.cpp.

References assert(), DL, E, emitGlobalConstantImpl(), llvm::StructLayout::getElementOffset(), llvm::User::getNumOperands(), llvm::User::getOperand(), llvm::StructLayout::getSizeInBytes(), llvm::ConstantStruct::getType(), I, llvm::Offset, llvm::AsmPrinter::OutStreamer, and Size.

Referenced by emitGlobalConstantImpl().

◆ emitGlobalConstantVector()

static void emitGlobalConstantVector	(	const DataLayout &	DL,
		const ConstantVector *	CV,
		AsmPrinter &	AP,
		AsmPrinter::AliasMapTy *	AliasList
	)

static

◆ emitKill()

static void emitKill	(	const MachineInstr *	MI,
		AsmPrinter &	AP
	)

static

Definition at line 1102 of file AsmPrinter.cpp.

References assert(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::MachineFunction::getSubtarget(), llvm::AsmPrinter::MF, MI, llvm::AsmPrinter::OutStreamer, llvm::printReg(), and llvm::raw_string_ostream::str().

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

◆ getBBAddrMapMetadata()

static unsigned getBBAddrMapMetadata ( const MachineBasicBlock & MBB )

static

Returns the BB metadata to be emitted in the .llvm_bb_addr_map section for a given basic block.

This can be used to capture more precise profile information. We use the last 4 bits (LSBs) to encode the following information:

(1): set if return block (ret or tail call).
(2): set if ends with a tail call.
(3): set if exception handling (EH) landing pad.
(4): set if the block can fall through to its next. The remaining bits are zero.

Definition at line 1322 of file AsmPrinter.cpp.

References llvm::MachineBasicBlock::back(), llvm::MachineBasicBlock::canFallThrough(), llvm::MachineBasicBlock::empty(), llvm::TargetSubtargetInfo::getInstrInfo(), llvm::MachineBasicBlock::getParent(), llvm::MachineFunction::getSubtarget(), llvm::MachineBasicBlock::isEHPad(), llvm::MachineBasicBlock::isReturnBlock(), llvm::HexagonInstrInfo::isTailCall(), MBB, and TII.

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

◆ getNumGlobalVariableUses()

static unsigned getNumGlobalVariableUses ( const Constant * C )

static

Compute the number of Global Variables that uses a Constant.

Definition at line 1868 of file AsmPrinter.cpp.

References llvm::CallingConv::C, and getNumGlobalVariableUses().

Referenced by getNumGlobalVariableUses(), and isGOTEquivalentCandidate().

◆ handleIndirectSymViaGOTPCRel()

static void handleIndirectSymViaGOTPCRel	(	AsmPrinter &	AP,
		const MCExpr **	ME,
		const Constant *	BaseCst,
		uint64_t	Offset
	)

static

Transform a not absolute MCExpr containing a reference to a GOT equivalent global, by a target specific GOT pc relative access to the final symbol.

Definition at line 3323 of file AsmPrinter.cpp.

References llvm::MCValue::getConstant(), llvm::TargetLoweringObjectFile::getIndirectSymViaGOTPCRel(), llvm::AsmPrinter::getObjFileLowering(), llvm::User::getOperand(), llvm::MCValue::getSymA(), llvm::MCValue::getSymB(), llvm::MCSymbolRefExpr::getSymbol(), llvm::AsmPrinter::getSymbol(), llvm::AsmPrinter::GlobalGOTEquivs, llvm::MCValue::isAbsolute(), llvm::AsmPrinter::MMI, llvm::Offset, llvm::AsmPrinter::OutStreamer, and llvm::TargetLoweringObjectFile::supportGOTPCRelWithOffset().

Referenced by emitGlobalConstantImpl().

◆ isGOTEquivalentCandidate()

static bool isGOTEquivalentCandidate	(	const GlobalVariable *	GV,
		unsigned &	NumGOTEquivUsers
	)

static

Only consider global GOT equivalents if at least one user is a cstexpr inside an initializer of another global variables.

Also, don't handle cstexpr inside instructions. During global variable emission, candidates are skipped and are emitted later in case at least one cstexpr isn't replaced by a PC relative GOT entry access.

Definition at line 1887 of file AsmPrinter.cpp.

References getNumGlobalVariableUses(), llvm::User::getOperand(), llvm::GlobalValue::hasGlobalUnnamedAddr(), llvm::GlobalVariable::hasInitializer(), llvm::GlobalVariable::isConstant(), llvm::GlobalValue::isDiscardableIfUnused(), and llvm::Value::users().

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