LLVM 18.0.0git
Classes | Macros | Functions | Variables
AsmPrinter.cpp File Reference
#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/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/TinyPtrVector.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/LazyMachineBlockFrequencyInfo.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/Object/ELFTypes.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 "llvm/TargetParser/Triple.h"
#include <algorithm>
#include <cassert>
#include <cinttypes>
#include <cstdint>
#include <iterator>
#include <memory>
#include <optional>
#include <string>
#include <utility>
#include <vector>

Go to the source code of this file.

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 uint32_t getBBAddrMapMetadata (const MachineBasicBlock &MBB)
 Returns the BB metadata to be emitted in the SHT_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

static cl::opt< std::string > BasicBlockProfileDump ("mbb-profile-dump", cl::Hidden, cl::desc("Basic block profile dump for external cost modelling. If " "matching up BBs with afterwards, the compilation must be " "performed with -basic-block-sections=labels. Enabling this " "flag during in-process ThinLTO is not supported."))
 
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 132 of file AsmPrinter.cpp.

Function Documentation

◆ canBeHidden()

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

◆ emitBasicBlockLoopComments()

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

◆ emitComments()

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

◆ 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 1245 of file AsmPrinter.cpp.

References MI, Name, OS, and llvm::AsmPrinter::OutStreamer.

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

◆ emitDebugValueComment()

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

◆ emitGlobalAliasInline()

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

◆ emitGlobalConstantArray()

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

◆ 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

◆ emitGlobalConstantFP() [2/2]

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

◆ 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

◆ emitGlobalConstantStruct()

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

◆ 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

◆ getBBAddrMapMetadata()

static uint32_t getBBAddrMapMetadata ( const MachineBasicBlock MBB)
static

◆ getNumGlobalVariableUses()

static unsigned getNumGlobalVariableUses ( const Constant C)
static

Compute the number of Global Variables that uses a Constant.

Definition at line 1949 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

◆ 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 1968 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().

◆ isRepeatedByteSequence() [1/2]

static int isRepeatedByteSequence ( const ConstantDataSequential V)
static

isRepeatedByteSequence - Determine whether the given value is composed of a repeated sequence of identical bytes and return the byte value.

If it is not a repeated sequence, return -1.

Definition at line 3131 of file AsmPrinter.cpp.

References assert(), llvm::CallingConv::C, and llvm::Data.

Referenced by emitGlobalConstantArray(), emitGlobalConstantDataSequential(), and isRepeatedByteSequence().

◆ isRepeatedByteSequence() [2/2]

static int isRepeatedByteSequence ( const Value V,
const DataLayout DL 
)
static

isRepeatedByteSequence - Determine whether the given value is composed of a repeated sequence of identical bytes and return the byte value.

If it is not a repeated sequence, return -1.

Definition at line 3143 of file AsmPrinter.cpp.

References assert(), DL, llvm::User::getOperand(), isRepeatedByteSequence(), and Size.

◆ needFuncLabels()

static bool needFuncLabels ( const MachineFunction MF)
static

◆ PrintChildLoopComment()

static void PrintChildLoopComment ( raw_ostream OS,
const MachineLoop Loop,
unsigned  FunctionNumber 
)
static

PrintChildLoopComment - Print comments about child loops within the loop for this basic block, with nesting.

Definition at line 3727 of file AsmPrinter.cpp.

References llvm::raw_ostream::indent(), OS, and PrintChildLoopComment().

Referenced by emitBasicBlockLoopComments(), and PrintChildLoopComment().

◆ PrintParentLoopComment()

static void PrintParentLoopComment ( raw_ostream OS,
const MachineLoop Loop,
unsigned  FunctionNumber 
)
static

◆ STATISTIC()

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

Variable Documentation

◆ BasicBlockProfileDump

cl::opt< std::string > BasicBlockProfileDump("mbb-profile-dump", cl::Hidden, cl::desc("Basic block profile dump for external cost modelling. If " "matching up BBs with afterwards, the compilation must be " "performed with -basic-block-sections=labels. Enabling this " "flag during in-process ThinLTO is not supported.")) ( "mbb-profile-dump"  ,
cl::Hidden  ,
cl::desc("Basic block profile dump for external cost modelling. If " "matching up BBs with afterwards, the compilation must be " "performed with -basic-block-sections=labels. Enabling this " "flag during in-process ThinLTO is not supported.")   
)
static

◆ CFGuardDescription

const char CFGuardDescription[] = "Control Flow Guard"

Definition at line 148 of file AsmPrinter.cpp.

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

◆ CFGuardName

const char CFGuardName[] = "Control Flow Guard"

Definition at line 147 of file AsmPrinter.cpp.

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

◆ CodeViewLineTablesGroupDescription

const char CodeViewLineTablesGroupDescription[] = "CodeView Line Tables"

Definition at line 150 of file AsmPrinter.cpp.

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

◆ CodeViewLineTablesGroupName

const char CodeViewLineTablesGroupName[] = "linetables"

Definition at line 149 of file AsmPrinter.cpp.

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

◆ DbgTimerDescription

const char DbgTimerDescription[] = "Debug Info Emission"

Definition at line 144 of file AsmPrinter.cpp.

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

◆ DbgTimerName

const char DbgTimerName[] = "emit"

Definition at line 143 of file AsmPrinter.cpp.

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

◆ DWARFGroupDescription

const char DWARFGroupDescription[] = "DWARF Emission"

Definition at line 142 of file AsmPrinter.cpp.

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

◆ DWARFGroupName

const char DWARFGroupName[] = "dwarf"

Definition at line 141 of file AsmPrinter.cpp.

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

◆ EHTimerDescription

const char EHTimerDescription[] = "DWARF Exception Writer"

Definition at line 146 of file AsmPrinter.cpp.

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

◆ EHTimerName

const char EHTimerName[] = "write_exception"

Definition at line 145 of file AsmPrinter.cpp.

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

◆ PPGroupDescription

const char PPGroupDescription[] = "Pseudo Probe Emission"

Definition at line 154 of file AsmPrinter.cpp.

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

◆ PPGroupName

const char PPGroupName[] = "pseudo probe"

Definition at line 153 of file AsmPrinter.cpp.

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

◆ PPTimerDescription

const char PPTimerDescription[] = "Pseudo Probe Emission"

Definition at line 152 of file AsmPrinter.cpp.

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

◆ PPTimerName

const char PPTimerName[] = "emit"

Definition at line 151 of file AsmPrinter.cpp.

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