LLVM  3.7.0
Macros | Typedefs | Functions | Variables
AsmPrinter.cpp File Reference
#include "llvm/CodeGen/AsmPrinter.h"
#include "DwarfDebug.h"
#include "DwarfException.h"
#include "WinException.h"
#include "WinCodeViewLineTables.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/CodeGen/Analysis.h"
#include "llvm/CodeGen/GCMetadataPrinter.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBundle.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/Mangler.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Operator.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbolELF.h"
#include "llvm/MC/MCValue.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/Timer.h"
#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetSubtargetInfo.h"
Include dependency graph for AsmPrinter.cpp:

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Macros

#define DEBUG_TYPE   "asm-printer"
 

Typedefs

typedef DenseMap< GCStrategy
*, std::unique_ptr
< GCMetadataPrinter > > 
gcp_map_type
 

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 void emitComments (const MachineInstr &MI, raw_ostream &CommentOS)
 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 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 Constant *C, AsmPrinter &AP, const Constant *BaseCV=nullptr, uint64_t Offset=0)
 
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, TargetMachine &TM)
 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 ConstantDataSequential *CDS, AsmPrinter &AP)
 
static void emitGlobalConstantArray (const ConstantArray *CA, AsmPrinter &AP, const Constant *BaseCV, uint64_t Offset)
 
static void emitGlobalConstantVector (const ConstantVector *CV, AsmPrinter &AP)
 
static void emitGlobalConstantStruct (const ConstantStruct *CS, AsmPrinter &AP, const Constant *BaseCV, uint64_t Offset)
 
static void emitGlobalConstantFP (const ConstantFP *CFP, AsmPrinter &AP)
 
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 Emission"
 
static const char *const DbgTimerName = "Debug Info Emission"
 
static const char *const EHTimerName = "DWARF Exception Writer"
 
static const char *const CodeViewLineTablesGroupName = "CodeView Line Tables"
 

Macro Definition Documentation

#define DEBUG_TYPE   "asm-printer"

Definition at line 57 of file AsmPrinter.cpp.

Typedef Documentation

typedef DenseMap<GCStrategy*, std::unique_ptr<GCMetadataPrinter> > gcp_map_type

Definition at line 68 of file AsmPrinter.cpp.

Function Documentation

static bool canBeHidden ( const GlobalValue GV,
const MCAsmInfo MAI 
)
static
static void emitBasicBlockLoopComments ( const MachineBasicBlock MBB,
const MachineLoopInfo LI,
const AsmPrinter AP 
)
static
static void emitComments ( const MachineInstr MI,
raw_ostream CommentOS 
)
static
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 664 of file AsmPrinter.cpp.

References llvm::lltok::APFloat, llvm::APFloat::convert(), llvm::APFloat::convertToDouble(), llvm::APFloat::convertToFloat(), llvm::StringRef::empty(), llvm::DIExpression::getBitPieceOffset(), llvm::DIExpression::getBitPieceSize(), llvm::MachineOperand::getCImm(), llvm::MachineModuleInfo::getContext(), llvm::MachineInstr::getDebugExpression(), llvm::MachineInstr::getDebugVariable(), llvm::MachineOperand::getFPImm(), llvm::TargetFrameLowering::getFrameIndexReference(), llvm::TargetSubtargetInfo::getFrameLowering(), llvm::MachineOperand::getImm(), llvm::MachineOperand::getIndex(), llvm::MCRegisterInfo::getName(), llvm::DIVariable::getName(), llvm::MachineInstr::getNumOperands(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::MCContext::getRegisterInfo(), llvm::DILocalVariable::getScope(), llvm::MachineFunction::getSubtarget(), llvm::Value::getType(), llvm::ConstantInt::getValue(), llvm::ConstantFP::getValueAPF(), llvm::APFloat::IEEEdouble, llvm::DIExpression::isBitPiece(), llvm::MachineOperand::isCImm(), llvm::Type::isDoubleTy(), llvm::MachineOperand::isFI(), llvm::Type::isFloatTy(), llvm::MachineOperand::isFPImm(), llvm::MachineOperand::isImm(), llvm::MachineOperand::isReg(), llvm::AsmPrinter::MF, llvm::AsmPrinter::MMI, llvm::AsmPrinter::OutStreamer, llvm::APInt::print(), llvm::APFloat::rmNearestTiesToEven, llvm::SP, and llvm::raw_svector_ostream::str().

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

static void emitGlobalConstantArray ( const ConstantArray CA,
AsmPrinter AP,
const Constant BaseCV,
uint64_t  Offset 
)
static
static void emitGlobalConstantDataSequential ( const ConstantDataSequential CDS,
AsmPrinter AP 
)
static
static void emitGlobalConstantFP ( const ConstantFP CFP,
AsmPrinter AP 
)
static
static void emitGlobalConstantImpl ( const Constant C,
AsmPrinter AP,
const Constant BaseCV = nullptr,
uint64_t  Offset = 0 
)
static
static void emitGlobalConstantLargeInt ( const ConstantInt CI,
AsmPrinter AP 
)
static
static void emitGlobalConstantStruct ( const ConstantStruct CS,
AsmPrinter AP,
const Constant BaseCV,
uint64_t  Offset 
)
static
static void emitGlobalConstantVector ( const ConstantVector CV,
AsmPrinter AP 
)
static
static void emitKill ( const MachineInstr MI,
AsmPrinter AP 
)
static
static gcp_map_type& getGCMap ( void *&  P)
static

Definition at line 69 of file AsmPrinter.cpp.

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

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 79 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().

static unsigned getNumGlobalVariableUses ( const Constant C)
static

Compute the number of Global Variables that uses a Constant.

Definition at line 928 of file AsmPrinter.cpp.

References llvm::Value::users().

Referenced by isGOTEquivalentCandidate().

static void handleIndirectSymViaGOTPCRel ( AsmPrinter AP,
const MCExpr **  ME,
const Constant BaseCst,
uint64_t  Offset 
)
static
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 947 of file AsmPrinter.cpp.

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

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

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 1779 of file AsmPrinter.cpp.

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

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

static int isRepeatedByteSequence ( const Value V,
TargetMachine TM 
)
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 1792 of file AsmPrinter.cpp.

References llvm::TargetMachine::getDataLayout(), llvm::User::getOperand(), llvm::Value::getType(), llvm::DataLayout::getTypeAllocSizeInBits(), llvm::APInt::getZExtValue(), isRepeatedByteSequence(), llvm::APInt::isSplat(), llvm::APInt::zextOrSelf(), and llvm::APInt::zextOrTrunc().

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 2324 of file AsmPrinter.cpp.

References llvm::CL, and llvm::raw_ostream::indent().

Referenced by emitBasicBlockLoopComments().

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

PrintParentLoopComment - Print comments about parent loops of this one.

Definition at line 2311 of file AsmPrinter.cpp.

References FunctionNumber(), llvm::LoopBase< N, M >::getHeader(), llvm::LoopBase< N, M >::getLoopDepth(), llvm::LoopBase< N, M >::getParentLoop(), and llvm::raw_ostream::indent().

Referenced by emitBasicBlockLoopComments().

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

Variable Documentation

const char* const CodeViewLineTablesGroupName = "CodeView Line Tables"
static

Definition at line 62 of file AsmPrinter.cpp.

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

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

Definition at line 60 of file AsmPrinter.cpp.

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

const char* const DWARFGroupName = "DWARF Emission"
static

Definition at line 59 of file AsmPrinter.cpp.

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

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

Definition at line 61 of file AsmPrinter.cpp.

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