LLVM  8.0.0svn
Macros | Typedefs | Functions | Variables
AsmPrinter.cpp File Reference
#include "llvm/CodeGen/AsmPrinter.h"
#include "AsmPrinterHandler.h"
#include "CodeViewDebug.h"
#include "DwarfDebug.h"
#include "DwarfException.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/Triple.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Analysis/EHPersonalities.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/GCStrategy.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/MachineMemOperand.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachineOptimizationRemarkEmitter.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/CodeGen/TargetSubtargetInfo.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/Function.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/GlobalIFunc.h"
#include "llvm/IR/GlobalIndirectSymbol.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/Type.h"
#include "llvm/IR/Value.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCCodePadder.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDirectives.h"
#include "llvm/MC/MCDwarf.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/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/TargetRegistry.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 <limits>
#include <memory>
#include <string>
#include <utility>
#include <vector>

Go to the source code of this file.

Macros

#define DEBUG_TYPE   "asm-printer"
 

Typedefs

using gcp_map_type = DenseMap< GCStrategy *, std::unique_ptr< GCMetadataPrinter > >
 

Functions

 STATISTIC (EmittedInsts, "Number of machine instrs printed")
 
static gcp_map_typegetGCMap (void *&P)
 
static unsigned getGVAlignmentLog2 (const GlobalValue *GV, const DataLayout &DL, unsigned InBits=0)
 getGVAlignmentLog2 - Return the alignment to use for the specified global value in log2 form. More...
 
static bool canBeHidden (const GlobalValue *GV, const MCAsmInfo &MAI)
 
static bool emitComments (const MachineInstr &MI, raw_ostream &CommentOS, AsmPrinter *AP)
 emitComments - Pretty-print comments for instructions. More...
 
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. More...
 
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. More...
 
static bool needFuncLabelsForEHOrDebugInfo (const MachineFunction &MF, MachineModuleInfo *MMI)
 
static unsigned getNumGlobalVariableUses (const Constant *C)
 Compute the number of Global Variables that uses a Constant. More...
 
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. More...
 
static void emitGlobalConstantImpl (const DataLayout &DL, const Constant *C, AsmPrinter &AP, const Constant *BaseCV=nullptr, uint64_t Offset=0)
 
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. More...
 
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. More...
 
static void emitGlobalConstantDataSequential (const DataLayout &DL, const ConstantDataSequential *CDS, AsmPrinter &AP)
 
static void emitGlobalConstantArray (const DataLayout &DL, const ConstantArray *CA, AsmPrinter &AP, const Constant *BaseCV, uint64_t Offset)
 
static void emitGlobalConstantVector (const DataLayout &DL, const ConstantVector *CV, AsmPrinter &AP)
 
static void emitGlobalConstantStruct (const DataLayout &DL, const ConstantStruct *CS, AsmPrinter &AP, const Constant *BaseCV, uint64_t Offset)
 
static void emitGlobalConstantLargeInt (const ConstantInt *CI, AsmPrinter &AP)
 
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. More...
 
static void PrintParentLoopComment (raw_ostream &OS, const MachineLoop *Loop, unsigned FunctionNumber)
 PrintParentLoopComment - Print comments about parent loops of this one. More...
 
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. More...
 
static void emitBasicBlockLoopComments (const MachineBasicBlock &MBB, const MachineLoopInfo *LI, const AsmPrinter &AP)
 emitBasicBlockLoopComments - Pretty-print comments for basic blocks. More...
 

Variables

static const char *const DWARFGroupName = "dwarf"
 
static const char *const DWARFGroupDescription = "DWARF Emission"
 
static const char *const DbgTimerName = "emit"
 
static const char *const DbgTimerDescription = "Debug Info Emission"
 
static const char *const EHTimerName = "write_exception"
 
static const char *const EHTimerDescription = "DWARF Exception Writer"
 
static const char *const CFGuardName = "Control Flow Guard"
 
static const char *const CFGuardDescription = "Control Flow Guard Tables"
 
static const char *const CodeViewLineTablesGroupName = "linetables"
 
static const char *const CodeViewLineTablesGroupDescription
 
static cl::opt< boolPrintSchedule ("print-schedule", cl::Hidden, cl::init(false), cl::desc("Print 'sched: [latency:throughput]' in .s output"))
 

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE   "asm-printer"

Definition at line 129 of file AsmPrinter.cpp.

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

Typedef Documentation

◆ gcp_map_type

using gcp_map_type = DenseMap<GCStrategy *, std::unique_ptr<GCMetadataPrinter> >

Definition at line 151 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 bool emitComments ( const MachineInstr MI,
raw_ostream CommentOS,
AsmPrinter AP 
)
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 932 of file AsmPrinter.cpp.

References llvm::StringRef::empty(), llvm::MachineInstr::getDebugLabel(), llvm::DILabel::getName(), llvm::MachineInstr::getNumOperands(), llvm::DILabel::getScope(), 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 842 of file AsmPrinter.cpp.

References llvm::lltok::APFloat, assert(), llvm::APFloat::convert(), llvm::APFloat::convertToDouble(), llvm::APFloat::convertToFloat(), llvm::StringRef::empty(), llvm::DIExpression::expr_ops(), llvm::MachineOperand::getCImm(), llvm::MachineInstr::getDebugExpression(), llvm::MachineInstr::getDebugVariable(), llvm::MachineOperand::getFPImm(), llvm::TargetFrameLowering::getFrameIndexReference(), llvm::TargetSubtargetInfo::getFrameLowering(), llvm::MachineOperand::getImm(), llvm::MachineOperand::getIndex(), llvm::DIVariable::getName(), llvm::DIExpression::getNumElements(), llvm::MachineInstr::getNumOperands(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::TargetSubtargetInfo::getRegisterInfo(), llvm::DILocalVariable::getScope(), llvm::MachineFunction::getSubtarget(), llvm::Value::getType(), llvm::ConstantInt::getValue(), llvm::ConstantFP::getValueAPF(), I, llvm::APFloatBase::IEEEdouble(), llvm::MachineOperand::isCImm(), llvm::Type::isDoubleTy(), llvm::MachineOperand::isFI(), llvm::Type::isFloatTy(), llvm::MachineOperand::isFPImm(), llvm::MachineOperand::isImm(), llvm::MachineOperand::isReg(), llvm::AsmPrinter::MF, Name, llvm::dwarf::OperationEncodingString(), llvm::AsmPrinter::OutStreamer, llvm::APInt::print(), llvm::printReg(), Reg, llvm::APFloatBase::rmNearestTiesToEven, and llvm::raw_svector_ostream::str().

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

◆ emitGlobalConstantArray()

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

◆ emitGlobalConstantDataSequential()

static void emitGlobalConstantDataSequential ( const DataLayout DL,
const ConstantDataSequential CDS,
AsmPrinter AP 
)
static

◆ emitGlobalConstantFP() [1/2]

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

◆ emitGlobalConstantFP() [2/2]

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

◆ emitGlobalConstantImpl()

static void emitGlobalConstantImpl ( const DataLayout DL,
const Constant C,
AsmPrinter AP,
const Constant BaseCV = nullptr,
uint64_t  Offset = 0 
)
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 
)
static

◆ emitGlobalConstantVector()

static void emitGlobalConstantVector ( const DataLayout DL,
const ConstantVector CV,
AsmPrinter AP 
)
static

◆ emitKill()

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

◆ getGCMap()

static gcp_map_type& getGCMap ( void *&  P)
static

◆ getGVAlignmentLog2()

static unsigned getGVAlignmentLog2 ( const GlobalValue GV,
const DataLayout DL,
unsigned  InBits = 0 
)
static

getGVAlignmentLog2 - Return the alignment to use for the specified global value in log2 form.

This rounds up to the preferred alignment if possible and legal.

Definition at line 162 of file AsmPrinter.cpp.

References llvm::GlobalValue::getAlignment(), llvm::DataLayout::getPreferredAlignmentLog(), llvm::GlobalValue::hasSection(), and llvm::Log2_32().

Referenced by llvm::AsmPrinter::EmitAlignment(), and llvm::AsmPrinter::EmitGlobalVariable().

◆ getNumGlobalVariableUses()

static unsigned getNumGlobalVariableUses ( const Constant C)
static

Compute the number of Global Variables that uses a Constant.

Definition at line 1243 of file AsmPrinter.cpp.

References llvm::Value::users().

Referenced by 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 1262 of file AsmPrinter.cpp.

References llvm::dyn_cast(), 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 2252 of file AsmPrinter.cpp.

References assert(), C, llvm::Data, llvm::StringRef::empty(), llvm::ConstantDataSequential::getRawDataValues(), and llvm::StringRef::size().

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 2264 of file AsmPrinter.cpp.

References assert(), llvm::User::getOperand(), llvm::Value::getType(), llvm::DataLayout::getTypeAllocSizeInBits(), llvm::APInt::getZExtValue(), isRepeatedByteSequence(), llvm::APInt::isSplat(), Size, and llvm::APInt::zextOrTrunc().

◆ needFuncLabelsForEHOrDebugInfo()

static bool needFuncLabelsForEHOrDebugInfo ( const MachineFunction MF,
MachineModuleInfo MMI 
)
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 2781 of file AsmPrinter.cpp.

References llvm::raw_ostream::indent().

Referenced by emitBasicBlockLoopComments().

◆ PrintParentLoopComment()

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

◆ STATISTIC()

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

Variable Documentation

◆ CFGuardDescription

const char* const CFGuardDescription = "Control Flow Guard Tables"
static

Definition at line 138 of file AsmPrinter.cpp.

◆ CFGuardName

const char* const CFGuardName = "Control Flow Guard"
static

Definition at line 137 of file AsmPrinter.cpp.

◆ CodeViewLineTablesGroupDescription

const char* const CodeViewLineTablesGroupDescription
static
Initial value:
=
"CodeView Line Tables"

Definition at line 140 of file AsmPrinter.cpp.

◆ CodeViewLineTablesGroupName

const char* const CodeViewLineTablesGroupName = "linetables"
static

Definition at line 139 of file AsmPrinter.cpp.

◆ DbgTimerDescription

const char* const DbgTimerDescription = "Debug Info Emission"
static

Definition at line 134 of file AsmPrinter.cpp.

◆ DbgTimerName

const char* const DbgTimerName = "emit"
static

Definition at line 133 of file AsmPrinter.cpp.

◆ DWARFGroupDescription

const char* const DWARFGroupDescription = "DWARF Emission"
static

Definition at line 132 of file AsmPrinter.cpp.

◆ DWARFGroupName

const char* const DWARFGroupName = "dwarf"
static

Definition at line 131 of file AsmPrinter.cpp.

◆ EHTimerDescription

const char* const EHTimerDescription = "DWARF Exception Writer"
static

Definition at line 136 of file AsmPrinter.cpp.

◆ EHTimerName

const char* const EHTimerName = "write_exception"
static

Definition at line 135 of file AsmPrinter.cpp.

◆ PrintSchedule

cl::opt<bool> PrintSchedule("print-schedule", cl::Hidden, cl::init(false), cl::desc("Print 'sched: [latency:throughput]' in .s output"))
static