/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp

Bug Summary

File:	lib/CodeGen/AsmPrinter/AsmPrinter.cpp
Warning:	line 2503, column 44 Called C++ object pointer is null
Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name AsmPrinter.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=none -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-10~svn373386/build-llvm/lib/CodeGen/AsmPrinter -I /build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter -I /build/llvm-toolchain-snapshot-10~svn373386/build-llvm/include -I /build/llvm-toolchain-snapshot-10~svn373386/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-10/lib/clang/10.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-10~svn373386/build-llvm/lib/CodeGen/AsmPrinter -fdebug-prefix-map=/build/llvm-toolchain-snapshot-10~svn373386=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2019-10-02-042503-23017-1 -x c++ /build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
1//===- AsmPrinter.cpp - Common AsmPrinter code ----------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the AsmPrinter class.
10//
11//===----------------------------------------------------------------------===//

13#include "llvm/CodeGen/AsmPrinter.h"
14#include "CodeViewDebug.h"
15#include "DwarfDebug.h"
16#include "DwarfException.h"
17#include "WasmException.h"
18#include "WinCFGuard.h"
19#include "WinException.h"
20#include "llvm/ADT/APFloat.h"
21#include "llvm/ADT/APInt.h"
22#include "llvm/ADT/DenseMap.h"
23#include "llvm/ADT/STLExtras.h"
24#include "llvm/ADT/SmallPtrSet.h"
25#include "llvm/ADT/SmallString.h"
26#include "llvm/ADT/SmallVector.h"
27#include "llvm/ADT/Statistic.h"
28#include "llvm/ADT/StringRef.h"
29#include "llvm/ADT/Triple.h"
30#include "llvm/ADT/Twine.h"
31#include "llvm/Analysis/ConstantFolding.h"
32#include "llvm/Analysis/EHPersonalities.h"
33#include "llvm/Analysis/OptimizationRemarkEmitter.h"
34#include "llvm/BinaryFormat/COFF.h"
35#include "llvm/BinaryFormat/Dwarf.h"
36#include "llvm/BinaryFormat/ELF.h"
37#include "llvm/CodeGen/GCMetadata.h"
38#include "llvm/CodeGen/GCMetadataPrinter.h"
39#include "llvm/CodeGen/GCStrategy.h"
40#include "llvm/CodeGen/MachineBasicBlock.h"
41#include "llvm/CodeGen/MachineConstantPool.h"
42#include "llvm/CodeGen/MachineDominators.h"
43#include "llvm/CodeGen/MachineFrameInfo.h"
44#include "llvm/CodeGen/MachineFunction.h"
45#include "llvm/CodeGen/MachineFunctionPass.h"
46#include "llvm/CodeGen/MachineInstr.h"
47#include "llvm/CodeGen/MachineInstrBundle.h"
48#include "llvm/CodeGen/MachineJumpTableInfo.h"
49#include "llvm/CodeGen/MachineLoopInfo.h"
50#include "llvm/CodeGen/MachineMemOperand.h"
51#include "llvm/CodeGen/MachineModuleInfo.h"
52#include "llvm/CodeGen/MachineModuleInfoImpls.h"
53#include "llvm/CodeGen/MachineOperand.h"
54#include "llvm/CodeGen/MachineOptimizationRemarkEmitter.h"
55#include "llvm/CodeGen/StackMaps.h"
56#include "llvm/CodeGen/TargetFrameLowering.h"
57#include "llvm/CodeGen/TargetInstrInfo.h"
58#include "llvm/CodeGen/TargetLowering.h"
59#include "llvm/CodeGen/TargetOpcodes.h"
60#include "llvm/CodeGen/TargetRegisterInfo.h"
61#include "llvm/IR/BasicBlock.h"
62#include "llvm/IR/Comdat.h"
63#include "llvm/IR/Constant.h"
64#include "llvm/IR/Constants.h"
65#include "llvm/IR/DataLayout.h"
66#include "llvm/IR/DebugInfoMetadata.h"
67#include "llvm/IR/DerivedTypes.h"
68#include "llvm/IR/Function.h"
69#include "llvm/IR/GlobalAlias.h"
70#include "llvm/IR/GlobalIFunc.h"
71#include "llvm/IR/GlobalIndirectSymbol.h"
72#include "llvm/IR/GlobalObject.h"
73#include "llvm/IR/GlobalValue.h"
74#include "llvm/IR/GlobalVariable.h"
75#include "llvm/IR/Instruction.h"
76#include "llvm/IR/Mangler.h"
77#include "llvm/IR/Metadata.h"
78#include "llvm/IR/Module.h"
79#include "llvm/IR/Operator.h"
80#include "llvm/IR/RemarkStreamer.h"
81#include "llvm/IR/Type.h"
82#include "llvm/IR/Value.h"
83#include "llvm/MC/MCAsmInfo.h"
84#include "llvm/MC/MCCodePadder.h"
85#include "llvm/MC/MCContext.h"
86#include "llvm/MC/MCDirectives.h"
87#include "llvm/MC/MCDwarf.h"
88#include "llvm/MC/MCExpr.h"
89#include "llvm/MC/MCInst.h"
90#include "llvm/MC/MCSection.h"
91#include "llvm/MC/MCSectionCOFF.h"
92#include "llvm/MC/MCSectionELF.h"
93#include "llvm/MC/MCSectionMachO.h"
94#include "llvm/MC/MCSectionXCOFF.h"
95#include "llvm/MC/MCStreamer.h"
96#include "llvm/MC/MCSubtargetInfo.h"
97#include "llvm/MC/MCSymbol.h"
98#include "llvm/MC/MCSymbolELF.h"
99#include "llvm/MC/MCSymbolXCOFF.h"
100#include "llvm/MC/MCTargetOptions.h"
101#include "llvm/MC/MCValue.h"
102#include "llvm/MC/SectionKind.h"
103#include "llvm/Pass.h"
104#include "llvm/Remarks/Remark.h"
105#include "llvm/Remarks/RemarkFormat.h"
106#include "llvm/Remarks/RemarkStringTable.h"
107#include "llvm/Support/Casting.h"
108#include "llvm/Support/CommandLine.h"
109#include "llvm/Support/Compiler.h"
110#include "llvm/Support/ErrorHandling.h"
111#include "llvm/Support/Format.h"
112#include "llvm/Support/MathExtras.h"
113#include "llvm/Support/Path.h"
114#include "llvm/Support/TargetRegistry.h"
115#include "llvm/Support/Timer.h"
116#include "llvm/Support/raw_ostream.h"
117#include "llvm/Target/TargetLoweringObjectFile.h"
118#include "llvm/Target/TargetMachine.h"
119#include "llvm/Target/TargetOptions.h"
120#include <algorithm>
121#include <cassert>
122#include <cinttypes>
123#include <cstdint>
124#include <iterator>
125#include <limits>
126#include <memory>
127#include <string>
128#include <utility>
129#include <vector>

131using namespace llvm;

133#define DEBUG_TYPE"asm-printer" "asm-printer"

135static const char *const DWARFGroupName = "dwarf";
136static const char *const DWARFGroupDescription = "DWARF Emission";
137static const char *const DbgTimerName = "emit";
138static const char *const DbgTimerDescription = "Debug Info Emission";
139static const char *const EHTimerName = "write_exception";
140static const char *const EHTimerDescription = "DWARF Exception Writer";
141static const char *const CFGuardName = "Control Flow Guard";
142static const char *const CFGuardDescription = "Control Flow Guard Tables";
143static const char *const CodeViewLineTablesGroupName = "linetables";
144static const char *const CodeViewLineTablesGroupDescription =
"CodeView Line Tables";

147STATISTIC(EmittedInsts, "Number of machine instrs printed")static llvm::Statistic EmittedInsts = {"asm-printer", "EmittedInsts"
, "Number of machine instrs printed", {0}, {false}};

149static cl::opt<bool> EnableRemarksSection(
  "remarks-section",
  cl::desc("Emit a section containing remark diagnostics metadata"),
  cl::init(false));

154char AsmPrinter::ID = 0;

156using gcp_map_type = DenseMap<GCStrategy *, std::unique_ptr<GCMetadataPrinter>>;

158static gcp_map_type &getGCMap(void *&P) {
if (!P)
  P = new gcp_map_type();
return *(gcp_map_type*)P;
162}

164/// getGVAlignment - Return the alignment to use for the specified global
165/// value.  This rounds up to the preferred alignment if possible and legal.
166Align AsmPrinter::getGVAlignment(const GlobalValue *GV, const DataLayout &DL,
                               Align InAlign) {
Align Alignment;
if (const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV))
  Alignment = Align(DL.getPreferredAlignment(GVar));

// If InAlign is specified, round it to it.
if (InAlign > Alignment)
  Alignment = InAlign;

// If the GV has a specified alignment, take it into account.
const MaybeAlign GVAlign(GV->getAlignment());
if (!GVAlign)
  return Alignment;

assert(GVAlign && "GVAlign must be set")((GVAlign && "GVAlign must be set") ? static_cast<
void> (0) : __assert_fail ("GVAlign && \"GVAlign must be set\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 181, __PRETTY_FUNCTION__));

// If the GVAlign is larger than NumBits, or if we are required to obey
// NumBits because the GV has an assigned section, obey it.
if (*GVAlign > Alignment || GV->hasSection())
  Alignment = *GVAlign;
return Alignment;
188}

190AsmPrinter::AsmPrinter(TargetMachine &tm, std::unique_ptr<MCStreamer> Streamer)
  : MachineFunctionPass(ID), TM(tm), MAI(tm.getMCAsmInfo()),
    OutContext(Streamer->getContext()), OutStreamer(std::move(Streamer)) {
VerboseAsm = OutStreamer->isVerboseAsm();
194}

196AsmPrinter::~AsmPrinter() {
assert(!DD && Handlers.empty() && "Debug/EH info didn't get finalized")((!DD && Handlers.empty() && "Debug/EH info didn't get finalized"
) ? static_cast<void> (0) : __assert_fail ("!DD && Handlers.empty() && \"Debug/EH info didn't get finalized\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 197, __PRETTY_FUNCTION__));

if (GCMetadataPrinters) {
  gcp_map_type &GCMap = getGCMap(GCMetadataPrinters);

  delete &GCMap;
  GCMetadataPrinters = nullptr;
}
205}

207bool AsmPrinter::isPositionIndependent() const {
return TM.isPositionIndependent();
209}

211/// getFunctionNumber - Return a unique ID for the current function.
212unsigned AsmPrinter::getFunctionNumber() const {
return MF->getFunctionNumber();
214}

216const TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const {
return *TM.getObjFileLowering();
218}

220const DataLayout &AsmPrinter::getDataLayout() const {
return MMI->getModule()->getDataLayout();
222}

224// Do not use the cached DataLayout because some client use it without a Module
225// (dsymutil, llvm-dwarfdump).
226unsigned AsmPrinter::getPointerSize() const {
return TM.getPointerSize(0); // FIXME: Default address space
228}

230const MCSubtargetInfo &AsmPrinter::getSubtargetInfo() const {
assert(MF && "getSubtargetInfo requires a valid MachineFunction!")((MF && "getSubtargetInfo requires a valid MachineFunction!"
) ? static_cast<void> (0) : __assert_fail ("MF && \"getSubtargetInfo requires a valid MachineFunction!\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 231, __PRETTY_FUNCTION__));
return MF->getSubtarget<MCSubtargetInfo>();
233}

235void AsmPrinter::EmitToStreamer(MCStreamer &S, const MCInst &Inst) {
S.EmitInstruction(Inst, getSubtargetInfo());
237}

239void AsmPrinter::emitInitialRawDwarfLocDirective(const MachineFunction &MF) {
assert(DD && "Dwarf debug file is not defined.")((DD && "Dwarf debug file is not defined.") ? static_cast
<void> (0) : __assert_fail ("DD && \"Dwarf debug file is not defined.\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 240, __PRETTY_FUNCTION__));
assert(OutStreamer->hasRawTextSupport() && "Expected assembly output mode.")((OutStreamer->hasRawTextSupport() && "Expected assembly output mode."
) ? static_cast<void> (0) : __assert_fail ("OutStreamer->hasRawTextSupport() && \"Expected assembly output mode.\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 241, __PRETTY_FUNCTION__));
(void)DD->emitInitialLocDirective(MF, /*CUID=*/0);
243}

245/// getCurrentSection() - Return the current section we are emitting to.
246const MCSection *AsmPrinter::getCurrentSection() const {
return OutStreamer->getCurrentSectionOnly();
248}

250void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
MachineFunctionPass::getAnalysisUsage(AU);
AU.addRequired<MachineModuleInfoWrapperPass>();
AU.addRequired<MachineOptimizationRemarkEmitterPass>();
AU.addRequired<GCModuleInfo>();
256}

258bool AsmPrinter::doInitialization(Module &M) {
auto *MMIWP = getAnalysisIfAvailable<MachineModuleInfoWrapperPass>();
MMI = MMIWP ? &MMIWP->getMMI() : nullptr;

// Initialize TargetLoweringObjectFile.
const_cast<TargetLoweringObjectFile&>(getObjFileLowering())
  .Initialize(OutContext, TM);

const_cast<TargetLoweringObjectFile &>(getObjFileLowering())
    .getModuleMetadata(M);

OutStreamer->InitSections(false);

// Emit the version-min deployment target directive if needed.
//
// FIXME: If we end up with a collection of these sorts of Darwin-specific
// or ELF-specific things, it may make sense to have a platform helper class
// that will work with the target helper class. For now keep it here, as the
// alternative is duplicated code in each of the target asm printers that
// use the directive, where it would need the same conditionalization
// anyway.
const Triple &Target = TM.getTargetTriple();
OutStreamer->EmitVersionForTarget(Target, M.getSDKVersion());

// Allow the target to emit any magic that it wants at the start of the file.
EmitStartOfAsmFile(M);

// Very minimal debug info. It is ignored if we emit actual debug info. If we
// don't, this at least helps the user find where a global came from.
if (MAI->hasSingleParameterDotFile()) {
  // .file "foo.c"
  OutStreamer->EmitFileDirective(
      llvm::sys::path::filename(M.getSourceFileName()));
}

GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
assert(MI && "AsmPrinter didn't require GCModuleInfo?")((MI && "AsmPrinter didn't require GCModuleInfo?") ? static_cast
<void> (0) : __assert_fail ("MI && \"AsmPrinter didn't require GCModuleInfo?\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 294, __PRETTY_FUNCTION__));
for (auto &I : *MI)
  if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
    MP->beginAssembly(M, *MI, *this);

// Emit module-level inline asm if it exists.
if (!M.getModuleInlineAsm().empty()) {
  // We're at the module level. Construct MCSubtarget from the default CPU
  // and target triple.
  std::unique_ptr<MCSubtargetInfo> STI(TM.getTarget().createMCSubtargetInfo(
      TM.getTargetTriple().str(), TM.getTargetCPU(),
      TM.getTargetFeatureString()));
  OutStreamer->AddComment("Start of file scope inline assembly");
  OutStreamer->AddBlankLine();
  EmitInlineAsm(M.getModuleInlineAsm()+"\n",
                OutContext.getSubtargetCopy(*STI), TM.Options.MCOptions);
  OutStreamer->AddComment("End of file scope inline assembly");
  OutStreamer->AddBlankLine();
}

if (MAI->doesSupportDebugInformation()) {
  bool EmitCodeView = MMI->getModule()->getCodeViewFlag();
  if (EmitCodeView && TM.getTargetTriple().isOSWindows()) {
    Handlers.emplace_back(std::make_unique<CodeViewDebug>(this),
                          DbgTimerName, DbgTimerDescription,
                          CodeViewLineTablesGroupName,
                          CodeViewLineTablesGroupDescription);
  }
  if (!EmitCodeView || MMI->getModule()->getDwarfVersion()) {
    DD = new DwarfDebug(this, &M);
    DD->beginModule();
    Handlers.emplace_back(std::unique_ptr<DwarfDebug>(DD), DbgTimerName,
                          DbgTimerDescription, DWARFGroupName,
                          DWARFGroupDescription);
  }
}

switch (MAI->getExceptionHandlingType()) {
case ExceptionHandling::SjLj:
case ExceptionHandling::DwarfCFI:
case ExceptionHandling::ARM:
  isCFIMoveForDebugging = true;
  if (MAI->getExceptionHandlingType() != ExceptionHandling::DwarfCFI)
    break;
  for (auto &F: M.getFunctionList()) {
    // If the module contains any function with unwind data,
    // .eh_frame has to be emitted.
    // Ignore functions that won't get emitted.
    if (!F.isDeclarationForLinker() && F.needsUnwindTableEntry()) {
      isCFIMoveForDebugging = false;
      break;
    }
  }
  break;
default:
  isCFIMoveForDebugging = false;
  break;
}

EHStreamer *ES = nullptr;
switch (MAI->getExceptionHandlingType()) {
case ExceptionHandling::None:
  break;
case ExceptionHandling::SjLj:
case ExceptionHandling::DwarfCFI:
  ES = new DwarfCFIException(this);
  break;
case ExceptionHandling::ARM:
  ES = new ARMException(this);
  break;
case ExceptionHandling::WinEH:
  switch (MAI->getWinEHEncodingType()) {
  default: llvm_unreachable("unsupported unwinding information encoding")::llvm::llvm_unreachable_internal("unsupported unwinding information encoding"
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 366);
  case WinEH::EncodingType::Invalid:
    break;
  case WinEH::EncodingType::X86:
  case WinEH::EncodingType::Itanium:
    ES = new WinException(this);
    break;
  }
  break;
case ExceptionHandling::Wasm:
  ES = new WasmException(this);
  break;
}
if (ES)
  Handlers.emplace_back(std::unique_ptr<EHStreamer>(ES), EHTimerName,
                        EHTimerDescription, DWARFGroupName,
                        DWARFGroupDescription);

if (mdconst::extract_or_null<ConstantInt>(
        MMI->getModule()->getModuleFlag("cfguardtable")))
  Handlers.emplace_back(std::make_unique<WinCFGuard>(this), CFGuardName,
                        CFGuardDescription, DWARFGroupName,
                        DWARFGroupDescription);

return false;
391}

393static bool canBeHidden(const GlobalValue *GV, const MCAsmInfo &MAI) {
if (!MAI.hasWeakDefCanBeHiddenDirective())
  return false;

return GV->canBeOmittedFromSymbolTable();
398}

400void AsmPrinter::EmitLinkage(const GlobalValue *GV, MCSymbol *GVSym) const {
GlobalValue::LinkageTypes Linkage = GV->getLinkage();
switch (Linkage) {
case GlobalValue::CommonLinkage:
case GlobalValue::LinkOnceAnyLinkage:
case GlobalValue::LinkOnceODRLinkage:
case GlobalValue::WeakAnyLinkage:
case GlobalValue::WeakODRLinkage:
  if (MAI->hasWeakDefDirective()) {
    // .globl _foo
    OutStreamer->EmitSymbolAttribute(GVSym, MCSA_Global);

    if (!canBeHidden(GV, *MAI))
      // .weak_definition _foo
      OutStreamer->EmitSymbolAttribute(GVSym, MCSA_WeakDefinition);
    else
      OutStreamer->EmitSymbolAttribute(GVSym, MCSA_WeakDefAutoPrivate);
  } else if (MAI->hasLinkOnceDirective()) {
    // .globl _foo
    OutStreamer->EmitSymbolAttribute(GVSym, MCSA_Global);
    //NOTE: linkonce is handled by the section the symbol was assigned to.
  } else {
    // .weak _foo
    OutStreamer->EmitSymbolAttribute(GVSym, MCSA_Weak);
  }
  return;
case GlobalValue::ExternalLinkage:
  // If external, declare as a global symbol: .globl _foo
  OutStreamer->EmitSymbolAttribute(GVSym, MCSA_Global);
  return;
case GlobalValue::PrivateLinkage:
  return;
case GlobalValue::InternalLinkage:
  if (MAI->hasDotLGloblDirective())
    OutStreamer->EmitSymbolAttribute(GVSym, MCSA_LGlobal);
  return;
case GlobalValue::AppendingLinkage:
case GlobalValue::AvailableExternallyLinkage:
case GlobalValue::ExternalWeakLinkage:
  llvm_unreachable("Should never emit this")::llvm::llvm_unreachable_internal("Should never emit this", "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 439);
}
llvm_unreachable("Unknown linkage type!")::llvm::llvm_unreachable_internal("Unknown linkage type!", "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 441);
442}

444void AsmPrinter::getNameWithPrefix(SmallVectorImpl<char> &Name,
                                 const GlobalValue *GV) const {
TM.getNameWithPrefix(Name, GV, getObjFileLowering().getMangler());
447}

449MCSymbol *AsmPrinter::getSymbol(const GlobalValue *GV) const {
return TM.getSymbol(GV);
451}

453/// EmitGlobalVariable - Emit the specified global variable to the .s file.
454void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
bool IsEmuTLSVar = TM.useEmulatedTLS() && GV->isThreadLocal();
2
←
Assuming the condition is false→
assert2.1
'IsEmuTLSVar' is false
(!(IsEmuTLSVar && GV->hasCommonLinkage()) &&((!(IsEmuTLSVar && GV->hasCommonLinkage()) &&
 "No emulated TLS variables in the common section") ? static_cast
<void> (0) : __assert_fail ("!(IsEmuTLSVar && GV->hasCommonLinkage()) && \"No emulated TLS variables in the common section\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 457, __PRETTY_FUNCTION__))
3
←
'?' condition is true→
       "No emulated TLS variables in the common section")((!(IsEmuTLSVar && GV->hasCommonLinkage()) &&
 "No emulated TLS variables in the common section") ? static_cast
<void> (0) : __assert_fail ("!(IsEmuTLSVar && GV->hasCommonLinkage()) && \"No emulated TLS variables in the common section\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 457, __PRETTY_FUNCTION__));

// Never emit TLS variable xyz in emulated TLS model.
// The initialization value is in __emutls_t.xyz instead of xyz.
if (IsEmuTLSVar3.1
'IsEmuTLSVar' is false
)
4
←
Taking false branch→
  return;

if (GV->hasInitializer()) {
5
←
Taking false branch→
  // Check to see if this is a special global used by LLVM, if so, emit it.
  if (EmitSpecialLLVMGlobal(GV))
    return;

  // Skip the emission of global equivalents. The symbol can be emitted later
  // on by emitGlobalGOTEquivs in case it turns out to be needed.
  if (GlobalGOTEquivs.count(getSymbol(GV)))
    return;

  if (isVerbose()) {
    // When printing the control variable __emutls_v.*,
    // we don't need to print the original TLS variable name.
    GV->printAsOperand(OutStreamer->GetCommentOS(),
                   /*PrintType=*/false, GV->getParent());
    OutStreamer->GetCommentOS() << '\n';
  }
}

MCSymbol *GVSym = getSymbol(GV);
MCSymbol *EmittedSym = GVSym;

// getOrCreateEmuTLSControlSym only creates the symbol with name and default
// attributes.
// GV's or GVSym's attributes will be used for the EmittedSym.
EmitVisibility(EmittedSym, GV->getVisibility(), !GV->isDeclaration());
6
←
Assuming the condition is false→

if (!GV->hasInitializer())   // External globals require no extra code.
7
←
Taking false branch→
  return;

GVSym->redefineIfPossible();
if (GVSym->isDefined() || GVSym->isVariable())
8
←
Taking false branch→
  report_fatal_error("symbol '" + Twine(GVSym->getName()) +
                     "' is already defined");

if (MAI->hasDotTypeDotSizeDirective())
9
←
Assuming the condition is false→
10
←
Taking false branch→
  OutStreamer->EmitSymbolAttribute(EmittedSym, MCSA_ELF_TypeObject);

SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, TM);

const DataLayout &DL = GV->getParent()->getDataLayout();
uint64_t Size = DL.getTypeAllocSize(GV->getValueType());

// If the alignment is specified, we *must* obey it.  Overaligning a global
// with a specified alignment is a prompt way to break globals emitted to
// sections and expected to be contiguous (e.g. ObjC metadata).
const Align Alignment = getGVAlignment(GV, DL);

for (const HandlerInfo &HI : Handlers) {
11
←
Assuming '__begin1' is equal to '__end1'→
  NamedRegionTimer T(HI.TimerName, HI.TimerDescription,
                     HI.TimerGroupName, HI.TimerGroupDescription,
                     TimePassesIsEnabled);
  HI.Handler->setSymbolSize(GVSym, Size);
}

// Handle common symbols
if (GVKind.isCommon()) {
12
←
Taking false branch→
  if (Size == 0) Size = 1;   // .comm Foo, 0 is undefined, avoid it.
  // .comm _foo, 42, 4
  const bool SupportsAlignment =
      getObjFileLowering().getCommDirectiveSupportsAlignment();
  OutStreamer->EmitCommonSymbol(GVSym, Size,
                                SupportsAlignment ? Alignment.value() : 0);
  return;
}

// Determine to which section this global should be emitted.
MCSection *TheSection = getObjFileLowering().SectionForGlobal(GV, GVKind, TM);

// If we have a bss global going to a section that supports the
// zerofill directive, do so here.
if (GVKind.isBSS() && MAI->hasMachoZeroFillDirective() &&
    TheSection->isVirtualSection()) {
  if (Size == 0)
    Size = 1; // zerofill of 0 bytes is undefined.
  EmitLinkage(GV, GVSym);
  // .zerofill __DATA, __bss, _foo, 400, 5
  OutStreamer->EmitZerofill(TheSection, GVSym, Size, Alignment.value());
  return;
}

// If this is a BSS local symbol and we are emitting in the BSS
// section use .lcomm/.comm directive.
if (GVKind.isBSSLocal() &&
    getObjFileLowering().getBSSSection() == TheSection) {
  if (Size == 0)
    Size = 1; // .comm Foo, 0 is undefined, avoid it.

  // Use .lcomm only if it supports user-specified alignment.
  // Otherwise, while it would still be correct to use .lcomm in some
  // cases (e.g. when Align == 1), the external assembler might enfore
  // some -unknown- default alignment behavior, which could cause
  // spurious differences between external and integrated assembler.
  // Prefer to simply fall back to .local / .comm in this case.
  if (MAI->getLCOMMDirectiveAlignmentType() != LCOMM::NoAlignment) {
    // .lcomm _foo, 42
    OutStreamer->EmitLocalCommonSymbol(GVSym, Size, Alignment.value());
    return;
  }

  // .local _foo
  OutStreamer->EmitSymbolAttribute(GVSym, MCSA_Local);
  // .comm _foo, 42, 4
  const bool SupportsAlignment =
      getObjFileLowering().getCommDirectiveSupportsAlignment();
  OutStreamer->EmitCommonSymbol(GVSym, Size,
                                SupportsAlignment ? Alignment.value() : 0);
  return;
}

// Handle thread local data for mach-o which requires us to output an
// additional structure of data and mangle the original symbol so that we
// can reference it later.
//
// TODO: This should become an "emit thread local global" method on TLOF.
// All of this macho specific stuff should be sunk down into TLOFMachO and
// stuff like "TLSExtraDataSection" should no longer be part of the parent
// TLOF class.  This will also make it more obvious that stuff like
// MCStreamer::EmitTBSSSymbol is macho specific and only called from macho
// specific code.
if (GVKind.isThreadLocal() && MAI->hasMachoTBSSDirective()) {
  // Emit the .tbss symbol
  MCSymbol *MangSym =
      OutContext.getOrCreateSymbol(GVSym->getName() + Twine("$tlv$init"));

  if (GVKind.isThreadBSS()) {
    TheSection = getObjFileLowering().getTLSBSSSection();
    OutStreamer->EmitTBSSSymbol(TheSection, MangSym, Size, Alignment.value());
  } else if (GVKind.isThreadData()) {
    OutStreamer->SwitchSection(TheSection);

    EmitAlignment(Alignment, GV);
    OutStreamer->EmitLabel(MangSym);

    EmitGlobalConstant(GV->getParent()->getDataLayout(),
                       GV->getInitializer());
  }

  OutStreamer->AddBlankLine();

  // Emit the variable struct for the runtime.
  MCSection *TLVSect = getObjFileLowering().getTLSExtraDataSection();

  OutStreamer->SwitchSection(TLVSect);
  // Emit the linkage here.
  EmitLinkage(GV, GVSym);
  OutStreamer->EmitLabel(GVSym);

  // Three pointers in size:
  //   - __tlv_bootstrap - used to make sure support exists
  //   - spare pointer, used when mapped by the runtime
  //   - pointer to mangled symbol above with initializer
  unsigned PtrSize = DL.getPointerTypeSize(GV->getType());
  OutStreamer->EmitSymbolValue(GetExternalSymbolSymbol("_tlv_bootstrap"),
                              PtrSize);
  OutStreamer->EmitIntValue(0, PtrSize);
  OutStreamer->EmitSymbolValue(MangSym, PtrSize);

  OutStreamer->AddBlankLine();
  return;
}

MCSymbol *EmittedInitSym = GVSym;

OutStreamer->SwitchSection(TheSection);

EmitLinkage(GV, EmittedInitSym);
EmitAlignment(Alignment, GV);

OutStreamer->EmitLabel(EmittedInitSym);

EmitGlobalConstant(GV->getParent()->getDataLayout(), GV->getInitializer());
13
←
Calling 'AsmPrinter::EmitGlobalConstant'→

if (MAI->hasDotTypeDotSizeDirective())
  // .size foo, 42
  OutStreamer->emitELFSize(EmittedInitSym,
                           MCConstantExpr::create(Size, OutContext));

OutStreamer->AddBlankLine();
643}

645/// Emit the directive and value for debug thread local expression
646///
647/// \p Value - The value to emit.
648/// \p Size - The size of the integer (in bytes) to emit.
649void AsmPrinter::EmitDebugValue(const MCExpr *Value, unsigned Size) const {
OutStreamer->EmitValue(Value, Size);
651}

653/// EmitFunctionHeader - This method emits the header for the current
654/// function.
655void AsmPrinter::EmitFunctionHeader() {
const Function &F = MF->getFunction();

if (isVerbose())
  OutStreamer->GetCommentOS()
      << "-- Begin function "
      << GlobalValue::dropLLVMManglingEscape(F.getName()) << '\n';

// Print out constants referenced by the function
EmitConstantPool();

// Print the 'header' of function.
OutStreamer->SwitchSection(getObjFileLowering().SectionForGlobal(&F, TM));
EmitVisibility(CurrentFnSym, F.getVisibility());

if (MAI->needsFunctionDescriptors() &&
    F.getLinkage() != GlobalValue::InternalLinkage)
  EmitLinkage(&F, CurrentFnDescSym);

EmitLinkage(&F, CurrentFnSym);
if (MAI->hasFunctionAlignment())
  EmitAlignment(MF->getAlignment(), &F);

if (MAI->hasDotTypeDotSizeDirective())
  OutStreamer->EmitSymbolAttribute(CurrentFnSym, MCSA_ELF_TypeFunction);

if (F.hasFnAttribute(Attribute::Cold))
  OutStreamer->EmitSymbolAttribute(CurrentFnSym, MCSA_Cold);

if (isVerbose()) {
  F.printAsOperand(OutStreamer->GetCommentOS(),
                 /*PrintType=*/false, F.getParent());
  OutStreamer->GetCommentOS() << '\n';
}

// Emit the prefix data.
if (F.hasPrefixData()) {
  if (MAI->hasSubsectionsViaSymbols()) {
    // Preserving prefix data on platforms which use subsections-via-symbols
    // is a bit tricky. Here we introduce a symbol for the prefix data
    // and use the .alt_entry attribute to mark the function's real entry point
    // as an alternative entry point to the prefix-data symbol.
    MCSymbol *PrefixSym = OutContext.createLinkerPrivateTempSymbol();
    OutStreamer->EmitLabel(PrefixSym);

    EmitGlobalConstant(F.getParent()->getDataLayout(), F.getPrefixData());

    // Emit an .alt_entry directive for the actual function symbol.
    OutStreamer->EmitSymbolAttribute(CurrentFnSym, MCSA_AltEntry);
  } else {
    EmitGlobalConstant(F.getParent()->getDataLayout(), F.getPrefixData());
  }
}

// Emit the function descriptor. This is a virtual function to allow targets
// to emit their specific function descriptor.
if (MAI->needsFunctionDescriptors())
  EmitFunctionDescriptor();

// Emit the CurrentFnSym. This is a virtual function to allow targets to do
// their wild and crazy things as required.
EmitFunctionEntryLabel();

// If the function had address-taken blocks that got deleted, then we have
// references to the dangling symbols.  Emit them at the start of the function
// so that we don't get references to undefined symbols.
std::vector<MCSymbol*> DeadBlockSyms;
MMI->takeDeletedSymbolsForFunction(&F, DeadBlockSyms);
for (unsigned i = 0, e = DeadBlockSyms.size(); i != e; ++i) {
  OutStreamer->AddComment("Address taken block that was later removed");
  OutStreamer->EmitLabel(DeadBlockSyms[i]);
}

if (CurrentFnBegin) {
  if (MAI->useAssignmentForEHBegin()) {
    MCSymbol *CurPos = OutContext.createTempSymbol();
    OutStreamer->EmitLabel(CurPos);
    OutStreamer->EmitAssignment(CurrentFnBegin,
                               MCSymbolRefExpr::create(CurPos, OutContext));
  } else {
    OutStreamer->EmitLabel(CurrentFnBegin);
  }
}

// Emit pre-function debug and/or EH information.
for (const HandlerInfo &HI : Handlers) {
  NamedRegionTimer T(HI.TimerName, HI.TimerDescription, HI.TimerGroupName,
                     HI.TimerGroupDescription, TimePassesIsEnabled);
  HI.Handler->beginFunction(MF);
}

// Emit the prologue data.
if (F.hasPrologueData())
  EmitGlobalConstant(F.getParent()->getDataLayout(), F.getPrologueData());
749}

751/// EmitFunctionEntryLabel - Emit the label that is the entrypoint for the
752/// function.  This can be overridden by targets as required to do custom stuff.
753void AsmPrinter::EmitFunctionEntryLabel() {
CurrentFnSym->redefineIfPossible();

// The function label could have already been emitted if two symbols end up
// conflicting due to asm renaming.  Detect this and emit an error.
if (CurrentFnSym->isVariable())
  report_fatal_error("'" + Twine(CurrentFnSym->getName()) +
                     "' is a protected alias");
if (CurrentFnSym->isDefined())
  report_fatal_error("'" + Twine(CurrentFnSym->getName()) +
                     "' label emitted multiple times to assembly file");

return OutStreamer->EmitLabel(CurrentFnSym);
766}

768/// emitComments - Pretty-print comments for instructions.
769static void emitComments(const MachineInstr &MI, raw_ostream &CommentOS) {
const MachineFunction *MF = MI.getMF();
const TargetInstrInfo *TII = MF->getSubtarget().getInstrInfo();

// Check for spills and reloads

// We assume a single instruction only has a spill or reload, not
// both.
Optional<unsigned> Size;
if ((Size = MI.getRestoreSize(TII))) {
  CommentOS << *Size << "-byte Reload\n";
} else if ((Size = MI.getFoldedRestoreSize(TII))) {
  if (*Size)
    CommentOS << *Size << "-byte Folded Reload\n";
} else if ((Size = MI.getSpillSize(TII))) {
  CommentOS << *Size << "-byte Spill\n";
} else if ((Size = MI.getFoldedSpillSize(TII))) {
  if (*Size)
    CommentOS << *Size << "-byte Folded Spill\n";
}

// Check for spill-induced copies
if (MI.getAsmPrinterFlag(MachineInstr::ReloadReuse))
  CommentOS << " Reload Reuse\n";
793}

795/// emitImplicitDef - This method emits the specified machine instruction
796/// that is an implicit def.
797void AsmPrinter::emitImplicitDef(const MachineInstr *MI) const {
Register RegNo = MI->getOperand(0).getReg();

SmallString<128> Str;
raw_svector_ostream OS(Str);
OS << "implicit-def: "
   << printReg(RegNo, MF->getSubtarget().getRegisterInfo());

OutStreamer->AddComment(OS.str());
OutStreamer->AddBlankLine();
807}

809static void emitKill(const MachineInstr *MI, AsmPrinter &AP) {
std::string Str;
raw_string_ostream OS(Str);
OS << "kill:";
for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
  const MachineOperand &Op = MI->getOperand(i);
  assert(Op.isReg() && "KILL instruction must have only register operands")((Op.isReg() && "KILL instruction must have only register operands"
) ? static_cast<void> (0) : __assert_fail ("Op.isReg() && \"KILL instruction must have only register operands\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 815, __PRETTY_FUNCTION__));
  OS << ' ' << (Op.isDef() ? "def " : "killed ")
     << printReg(Op.getReg(), AP.MF->getSubtarget().getRegisterInfo());
}
AP.OutStreamer->AddComment(OS.str());
AP.OutStreamer->AddBlankLine();
821}

823/// emitDebugValueComment - This method handles the target-independent form
824/// of DBG_VALUE, returning true if it was able to do so.  A false return
825/// means the target will need to handle MI in EmitInstruction.
826static bool emitDebugValueComment(const MachineInstr *MI, AsmPrinter &AP) {
// This code handles only the 4-operand target-independent form.
if (MI->getNumOperands() != 4)
  return false;

SmallString<128> Str;
raw_svector_ostream OS(Str);
OS << "DEBUG_VALUE: ";

const DILocalVariable *V = MI->getDebugVariable();
if (auto *SP = dyn_cast<DISubprogram>(V->getScope())) {
  StringRef Name = SP->getName();
  if (!Name.empty())
    OS << Name << ":";
}
OS << V->getName();
OS << " <- ";

// The second operand is only an offset if it's an immediate.
bool MemLoc = MI->getOperand(0).isReg() && MI->getOperand(1).isImm();
int64_t Offset = MemLoc ? MI->getOperand(1).getImm() : 0;
const DIExpression *Expr = MI->getDebugExpression();
if (Expr->getNumElements()) {
  OS << '[';
  bool NeedSep = false;
  for (auto Op : Expr->expr_ops()) {
    if (NeedSep)
      OS << ", ";
    else
      NeedSep = true;
    OS << dwarf::OperationEncodingString(Op.getOp());
    for (unsigned I = 0; I < Op.getNumArgs(); ++I)
      OS << ' ' << Op.getArg(I);
  }
  OS << "] ";
}

// Register or immediate value. Register 0 means undef.
if (MI->getOperand(0).isFPImm()) {
  APFloat APF = APFloat(MI->getOperand(0).getFPImm()->getValueAPF());
  if (MI->getOperand(0).getFPImm()->getType()->isFloatTy()) {
    OS << (double)APF.convertToFloat();
  } else if (MI->getOperand(0).getFPImm()->getType()->isDoubleTy()) {
    OS << APF.convertToDouble();
  } else {
    // There is no good way to print long double.  Convert a copy to
    // double.  Ah well, it's only a comment.
    bool ignored;
    APF.convert(APFloat::IEEEdouble(), APFloat::rmNearestTiesToEven,
                &ignored);
    OS << "(long double) " << APF.convertToDouble();
  }
} else if (MI->getOperand(0).isImm()) {
  OS << MI->getOperand(0).getImm();
} else if (MI->getOperand(0).isCImm()) {
  MI->getOperand(0).getCImm()->getValue().print(OS, false /*isSigned*/);
} else {
  unsigned Reg;
  if (MI->getOperand(0).isReg()) {
    Reg = MI->getOperand(0).getReg();
  } else {
    assert(MI->getOperand(0).isFI() && "Unknown operand type")((MI->getOperand(0).isFI() && "Unknown operand type"
) ? static_cast<void> (0) : __assert_fail ("MI->getOperand(0).isFI() && \"Unknown operand type\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 887, __PRETTY_FUNCTION__));
    const TargetFrameLowering *TFI = AP.MF->getSubtarget().getFrameLowering();
    Offset += TFI->getFrameIndexReference(*AP.MF,
                                          MI->getOperand(0).getIndex(), Reg);
    MemLoc = true;
  }
  if (Reg == 0) {
    // Suppress offset, it is not meaningful here.
    OS << "undef";
    // NOTE: Want this comment at start of line, don't emit with AddComment.
    AP.OutStreamer->emitRawComment(OS.str());
    return true;
  }
  if (MemLoc)
    OS << '[';
  OS << printReg(Reg, AP.MF->getSubtarget().getRegisterInfo());
}

if (MemLoc)
  OS << '+' << Offset << ']';

// NOTE: Want this comment at start of line, don't emit with AddComment.
AP.OutStreamer->emitRawComment(OS.str());
return true;
911}

913/// This method handles the target-independent form of DBG_LABEL, returning
914/// true if it was able to do so.  A false return means the target will need
915/// to handle MI in EmitInstruction.
916static bool emitDebugLabelComment(const MachineInstr *MI, AsmPrinter &AP) {
if (MI->getNumOperands() != 1)
  return false;

SmallString<128> Str;
raw_svector_ostream OS(Str);
OS << "DEBUG_LABEL: ";

const DILabel *V = MI->getDebugLabel();
if (auto *SP = dyn_cast<DISubprogram>(
        V->getScope()->getNonLexicalBlockFileScope())) {
  StringRef Name = SP->getName();
  if (!Name.empty())
    OS << Name << ":";
}
OS << V->getName();

// NOTE: Want this comment at start of line, don't emit with AddComment.
AP.OutStreamer->emitRawComment(OS.str());
return true;
936}

938AsmPrinter::CFIMoveType AsmPrinter::needsCFIMoves() const {
if (MAI->getExceptionHandlingType() == ExceptionHandling::DwarfCFI &&
    MF->getFunction().needsUnwindTableEntry())
  return CFI_M_EH;

if (MMI->hasDebugInfo())
  return CFI_M_Debug;

return CFI_M_None;
947}

949bool AsmPrinter::needsSEHMoves() {
return MAI->usesWindowsCFI() && MF->getFunction().needsUnwindTableEntry();
951}

953void AsmPrinter::emitCFIInstruction(const MachineInstr &MI) {
ExceptionHandling ExceptionHandlingType = MAI->getExceptionHandlingType();
if (ExceptionHandlingType != ExceptionHandling::DwarfCFI &&
    ExceptionHandlingType != ExceptionHandling::ARM)
  return;

if (needsCFIMoves() == CFI_M_None)
  return;

// If there is no "real" instruction following this CFI instruction, skip
// emitting it; it would be beyond the end of the function's FDE range.
auto *MBB = MI.getParent();
auto I = std::next(MI.getIterator());
while (I != MBB->end() && I->isTransient())
  ++I;
if (I == MBB->instr_end() &&
    MBB->getReverseIterator() == MBB->getParent()->rbegin())
  return;

const std::vector<MCCFIInstruction> &Instrs = MF->getFrameInstructions();
unsigned CFIIndex = MI.getOperand(0).getCFIIndex();
const MCCFIInstruction &CFI = Instrs[CFIIndex];
emitCFIInstruction(CFI);
976}

978void AsmPrinter::emitFrameAlloc(const MachineInstr &MI) {
// The operands are the MCSymbol and the frame offset of the allocation.
MCSymbol *FrameAllocSym = MI.getOperand(0).getMCSymbol();
int FrameOffset = MI.getOperand(1).getImm();

// Emit a symbol assignment.
OutStreamer->EmitAssignment(FrameAllocSym,
                           MCConstantExpr::create(FrameOffset, OutContext));
986}

988void AsmPrinter::emitStackSizeSection(const MachineFunction &MF) {
if (!MF.getTarget().Options.EmitStackSizeSection)
  return;

MCSection *StackSizeSection =
    getObjFileLowering().getStackSizesSection(*getCurrentSection());
if (!StackSizeSection)
  return;

const MachineFrameInfo &FrameInfo = MF.getFrameInfo();
// Don't emit functions with dynamic stack allocations.
if (FrameInfo.hasVarSizedObjects())
  return;

OutStreamer->PushSection();
OutStreamer->SwitchSection(StackSizeSection);

const MCSymbol *FunctionSymbol = getFunctionBegin();
uint64_t StackSize = FrameInfo.getStackSize();
OutStreamer->EmitSymbolValue(FunctionSymbol, TM.getProgramPointerSize());
OutStreamer->EmitULEB128IntValue(StackSize);

OutStreamer->PopSection();
1011}

1013static bool needFuncLabelsForEHOrDebugInfo(const MachineFunction &MF,
                                         MachineModuleInfo *MMI) {
if (!MF.getLandingPads().empty() || MF.hasEHFunclets() || MMI->hasDebugInfo())
  return true;

// We might emit an EH table that uses function begin and end labels even if
// we don't have any landingpads.
if (!MF.getFunction().hasPersonalityFn())
  return false;
return !isNoOpWithoutInvoke(
    classifyEHPersonality(MF.getFunction().getPersonalityFn()));
1024}

1026/// EmitFunctionBody - This method emits the body and trailer for a
1027/// function.
1028void AsmPrinter::EmitFunctionBody() {
EmitFunctionHeader();

// Emit target-specific gunk before the function body.
EmitFunctionBodyStart();

bool ShouldPrintDebugScopes = MMI->hasDebugInfo();

if (isVerbose()) {
  // Get MachineDominatorTree or compute it on the fly if it's unavailable
  MDT = getAnalysisIfAvailable<MachineDominatorTree>();
  if (!MDT) {
    OwnedMDT = std::make_unique<MachineDominatorTree>();
    OwnedMDT->getBase().recalculate(*MF);
    MDT = OwnedMDT.get();
  }

  // Get MachineLoopInfo or compute it on the fly if it's unavailable
  MLI = getAnalysisIfAvailable<MachineLoopInfo>();
  if (!MLI) {
    OwnedMLI = std::make_unique<MachineLoopInfo>();
    OwnedMLI->getBase().analyze(MDT->getBase());
    MLI = OwnedMLI.get();
  }
}

// Print out code for the function.
bool HasAnyRealCode = false;
int NumInstsInFunction = 0;
for (auto &MBB : *MF) {
  // Print a label for the basic block.
  EmitBasicBlockStart(MBB);
  for (auto &MI : MBB) {
    // Print the assembly for the instruction.
    if (!MI.isPosition() && !MI.isImplicitDef() && !MI.isKill() &&
        !MI.isDebugInstr()) {
      HasAnyRealCode = true;
      ++NumInstsInFunction;
    }

    // If there is a pre-instruction symbol, emit a label for it here.
    if (MCSymbol *S = MI.getPreInstrSymbol())
      OutStreamer->EmitLabel(S);

    if (ShouldPrintDebugScopes) {
      for (const HandlerInfo &HI : Handlers) {
        NamedRegionTimer T(HI.TimerName, HI.TimerDescription,
                           HI.TimerGroupName, HI.TimerGroupDescription,
                           TimePassesIsEnabled);
        HI.Handler->beginInstruction(&MI);
      }
    }

    if (isVerbose())
      emitComments(MI, OutStreamer->GetCommentOS());

    switch (MI.getOpcode()) {
    case TargetOpcode::CFI_INSTRUCTION:
      emitCFIInstruction(MI);
      break;
    case TargetOpcode::LOCAL_ESCAPE:
      emitFrameAlloc(MI);
      break;
    case TargetOpcode::ANNOTATION_LABEL:
    case TargetOpcode::EH_LABEL:
    case TargetOpcode::GC_LABEL:
      OutStreamer->EmitLabel(MI.getOperand(0).getMCSymbol());
      break;
    case TargetOpcode::INLINEASM:
    case TargetOpcode::INLINEASM_BR:
      EmitInlineAsm(&MI);
      break;
    case TargetOpcode::DBG_VALUE:
      if (isVerbose()) {
        if (!emitDebugValueComment(&MI, *this))
          EmitInstruction(&MI);
      }
      break;
    case TargetOpcode::DBG_LABEL:
      if (isVerbose()) {
        if (!emitDebugLabelComment(&MI, *this))
          EmitInstruction(&MI);
      }
      break;
    case TargetOpcode::IMPLICIT_DEF:
      if (isVerbose()) emitImplicitDef(&MI);
      break;
    case TargetOpcode::KILL:
      if (isVerbose()) emitKill(&MI, *this);
      break;
    default:
      EmitInstruction(&MI);
      break;
    }

    // If there is a post-instruction symbol, emit a label for it here.
    if (MCSymbol *S = MI.getPostInstrSymbol())
      OutStreamer->EmitLabel(S);

    if (ShouldPrintDebugScopes) {
      for (const HandlerInfo &HI : Handlers) {
        NamedRegionTimer T(HI.TimerName, HI.TimerDescription,
                           HI.TimerGroupName, HI.TimerGroupDescription,
                           TimePassesIsEnabled);
        HI.Handler->endInstruction();
      }
    }
  }

  EmitBasicBlockEnd(MBB);
}

EmittedInsts += NumInstsInFunction;
MachineOptimizationRemarkAnalysis R(DEBUG_TYPE"asm-printer", "InstructionCount",
                                    MF->getFunction().getSubprogram(),
                                    &MF->front());
R << ore::NV("NumInstructions", NumInstsInFunction)
  << " instructions in function";
ORE->emit(R);

// If the function is empty and the object file uses .subsections_via_symbols,
// then we need to emit *something* to the function body to prevent the
// labels from collapsing together.  Just emit a noop.
// Similarly, don't emit empty functions on Windows either. It can lead to
// duplicate entries (two functions with the same RVA) in the Guard CF Table
// after linking, causing the kernel not to load the binary:
// https://developercommunity.visualstudio.com/content/problem/45366/vc-linker-creates-invalid-dll-with-clang-cl.html
// FIXME: Hide this behind some API in e.g. MCAsmInfo or MCTargetStreamer.
const Triple &TT = TM.getTargetTriple();
if (!HasAnyRealCode && (MAI->hasSubsectionsViaSymbols() ||
                        (TT.isOSWindows() && TT.isOSBinFormatCOFF()))) {
  MCInst Noop;
  MF->getSubtarget().getInstrInfo()->getNoop(Noop);

  // Targets can opt-out of emitting the noop here by leaving the opcode
  // unspecified.
  if (Noop.getOpcode()) {
    OutStreamer->AddComment("avoids zero-length function");
    OutStreamer->EmitInstruction(Noop, getSubtargetInfo());
  }
}

const Function &F = MF->getFunction();
for (const auto &BB : F) {
  if (!BB.hasAddressTaken())
    continue;
  MCSymbol *Sym = GetBlockAddressSymbol(&BB);
  if (Sym->isDefined())
    continue;
  OutStreamer->AddComment("Address of block that was removed by CodeGen");
  OutStreamer->EmitLabel(Sym);
}

// Emit target-specific gunk after the function body.
EmitFunctionBodyEnd();

if (needFuncLabelsForEHOrDebugInfo(*MF, MMI) ||
    MAI->hasDotTypeDotSizeDirective()) {
  // Create a symbol for the end of function.
  CurrentFnEnd = createTempSymbol("func_end");
  OutStreamer->EmitLabel(CurrentFnEnd);
}

// If the target wants a .size directive for the size of the function, emit
// it.
if (MAI->hasDotTypeDotSizeDirective()) {
  // We can get the size as difference between the function label and the
  // temp label.
  const MCExpr *SizeExp = MCBinaryExpr::createSub(
      MCSymbolRefExpr::create(CurrentFnEnd, OutContext),
      MCSymbolRefExpr::create(CurrentFnSymForSize, OutContext), OutContext);
  OutStreamer->emitELFSize(CurrentFnSym, SizeExp);
}

for (const HandlerInfo &HI : Handlers) {
  NamedRegionTimer T(HI.TimerName, HI.TimerDescription, HI.TimerGroupName,
                     HI.TimerGroupDescription, TimePassesIsEnabled);
  HI.Handler->markFunctionEnd();
}

// Print out jump tables referenced by the function.
EmitJumpTableInfo();

// Emit post-function debug and/or EH information.
for (const HandlerInfo &HI : Handlers) {
  NamedRegionTimer T(HI.TimerName, HI.TimerDescription, HI.TimerGroupName,
                     HI.TimerGroupDescription, TimePassesIsEnabled);
  HI.Handler->endFunction(MF);
}

// Emit section containing stack size metadata.
emitStackSizeSection(*MF);

if (isVerbose())
  OutStreamer->GetCommentOS() << "-- End function\n";

OutStreamer->AddBlankLine();
1225}

1227/// Compute the number of Global Variables that uses a Constant.
1228static unsigned getNumGlobalVariableUses(const Constant *C) {
if (!C)
  return 0;

if (isa<GlobalVariable>(C))
  return 1;

unsigned NumUses = 0;
for (auto *CU : C->users())
  NumUses += getNumGlobalVariableUses(dyn_cast<Constant>(CU));

return NumUses;
1240}

1242/// Only consider global GOT equivalents if at least one user is a
1243/// cstexpr inside an initializer of another global variables. Also, don't
1244/// handle cstexpr inside instructions. During global variable emission,
1245/// candidates are skipped and are emitted later in case at least one cstexpr
1246/// isn't replaced by a PC relative GOT entry access.
1247static bool isGOTEquivalentCandidate(const GlobalVariable *GV,
                                   unsigned &NumGOTEquivUsers) {
// Global GOT equivalents are unnamed private globals with a constant
// pointer initializer to another global symbol. They must point to a
// GlobalVariable or Function, i.e., as GlobalValue.
if (!GV->hasGlobalUnnamedAddr() || !GV->hasInitializer() ||
    !GV->isConstant() || !GV->isDiscardableIfUnused() ||
    !isa<GlobalValue>(GV->getOperand(0)))
  return false;

// To be a got equivalent, at least one of its users need to be a constant
// expression used by another global variable.
for (auto *U : GV->users())
  NumGOTEquivUsers += getNumGlobalVariableUses(dyn_cast<Constant>(U));

return NumGOTEquivUsers > 0;
1263}

1265/// Unnamed constant global variables solely contaning a pointer to
1266/// another globals variable is equivalent to a GOT table entry; it contains the
1267/// the address of another symbol. Optimize it and replace accesses to these
1268/// "GOT equivalents" by using the GOT entry for the final global instead.
1269/// Compute GOT equivalent candidates among all global variables to avoid
1270/// emitting them if possible later on, after it use is replaced by a GOT entry
1271/// access.
1272void AsmPrinter::computeGlobalGOTEquivs(Module &M) {
if (!getObjFileLowering().supportIndirectSymViaGOTPCRel())
  return;

for (const auto &G : M.globals()) {
  unsigned NumGOTEquivUsers = 0;
  if (!isGOTEquivalentCandidate(&G, NumGOTEquivUsers))
    continue;

  const MCSymbol *GOTEquivSym = getSymbol(&G);
  GlobalGOTEquivs[GOTEquivSym] = std::make_pair(&G, NumGOTEquivUsers);
}
1284}

1286/// Constant expressions using GOT equivalent globals may not be eligible
1287/// for PC relative GOT entry conversion, in such cases we need to emit such
1288/// globals we previously omitted in EmitGlobalVariable.
1289void AsmPrinter::emitGlobalGOTEquivs() {
if (!getObjFileLowering().supportIndirectSymViaGOTPCRel())
  return;

SmallVector<const GlobalVariable *, 8> FailedCandidates;
for (auto &I : GlobalGOTEquivs) {
  const GlobalVariable *GV = I.second.first;
  unsigned Cnt = I.second.second;
  if (Cnt)
    FailedCandidates.push_back(GV);
}
GlobalGOTEquivs.clear();

for (auto *GV : FailedCandidates)
  EmitGlobalVariable(GV);
1304}

1306void AsmPrinter::emitGlobalIndirectSymbol(Module &M,
                                        const GlobalIndirectSymbol& GIS) {
MCSymbol *Name = getSymbol(&GIS);

if (GIS.hasExternalLinkage() || !MAI->getWeakRefDirective())
  OutStreamer->EmitSymbolAttribute(Name, MCSA_Global);
else if (GIS.hasWeakLinkage() || GIS.hasLinkOnceLinkage())
  OutStreamer->EmitSymbolAttribute(Name, MCSA_WeakReference);
else
  assert(GIS.hasLocalLinkage() && "Invalid alias or ifunc linkage")((GIS.hasLocalLinkage() && "Invalid alias or ifunc linkage"
) ? static_cast<void> (0) : __assert_fail ("GIS.hasLocalLinkage() && \"Invalid alias or ifunc linkage\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 1315, __PRETTY_FUNCTION__));

bool IsFunction = GIS.getValueType()->isFunctionTy();

// Treat bitcasts of functions as functions also. This is important at least
// on WebAssembly where object and function addresses can't alias each other.
if (!IsFunction)
  if (auto *CE = dyn_cast<ConstantExpr>(GIS.getIndirectSymbol()))
    if (CE->getOpcode() == Instruction::BitCast)
      IsFunction =
        CE->getOperand(0)->getType()->getPointerElementType()->isFunctionTy();

// Set the symbol type to function if the alias has a function type.
// This affects codegen when the aliasee is not a function.
if (IsFunction)
  OutStreamer->EmitSymbolAttribute(Name, isa<GlobalIFunc>(GIS)
                                             ? MCSA_ELF_TypeIndFunction
                                             : MCSA_ELF_TypeFunction);

EmitVisibility(Name, GIS.getVisibility());

const MCExpr *Expr = lowerConstant(GIS.getIndirectSymbol());

if (isa<GlobalAlias>(&GIS) && MAI->hasAltEntry() && isa<MCBinaryExpr>(Expr))
  OutStreamer->EmitSymbolAttribute(Name, MCSA_AltEntry);

// Emit the directives as assignments aka .set:
OutStreamer->EmitAssignment(Name, Expr);

if (auto *GA = dyn_cast<GlobalAlias>(&GIS)) {
  // If the aliasee does not correspond to a symbol in the output, i.e. the
  // alias is not of an object or the aliased object is private, then set the
  // size of the alias symbol from the type of the alias. We don't do this in
  // other situations as the alias and aliasee having differing types but same
  // size may be intentional.
  const GlobalObject *BaseObject = GA->getBaseObject();
  if (MAI->hasDotTypeDotSizeDirective() && GA->getValueType()->isSized() &&
      (!BaseObject || BaseObject->hasPrivateLinkage())) {
    const DataLayout &DL = M.getDataLayout();
    uint64_t Size = DL.getTypeAllocSize(GA->getValueType());
    OutStreamer->emitELFSize(Name, MCConstantExpr::create(Size, OutContext));
  }
}
1358}

1360void AsmPrinter::emitRemarksSection(Module &M) {
RemarkStreamer *RS = M.getContext().getRemarkStreamer();
if (!RS)
  return;
remarks::RemarkSerializer &RemarkSerializer = RS->getSerializer();

Optional<SmallString<128>> Filename;
if (Optional<StringRef> FilenameRef = RS->getFilename()) {
  Filename = *FilenameRef;
  sys::fs::make_absolute(*Filename);
  assert(!Filename->empty() && "The filename can't be empty.")((!Filename->empty() && "The filename can't be empty."
) ? static_cast<void> (0) : __assert_fail ("!Filename->empty() && \"The filename can't be empty.\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 1370, __PRETTY_FUNCTION__));
}

std::string Buf;
raw_string_ostream OS(Buf);
std::unique_ptr<remarks::MetaSerializer> MetaSerializer =
    Filename ? RemarkSerializer.metaSerializer(OS, StringRef(*Filename))
             : RemarkSerializer.metaSerializer(OS);
MetaSerializer->emit();

// Switch to the right section: .remarks/__remarks.
MCSection *RemarksSection =
    OutContext.getObjectFileInfo()->getRemarksSection();
OutStreamer->SwitchSection(RemarksSection);

OutStreamer->EmitBinaryData(OS.str());
1386}

1388bool AsmPrinter::doFinalization(Module &M) {
// Set the MachineFunction to nullptr so that we can catch attempted
// accesses to MF specific features at the module level and so that
// we can conditionalize accesses based on whether or not it is nullptr.
MF = nullptr;

// Gather all GOT equivalent globals in the module. We really need two
// passes over the globals: one to compute and another to avoid its emission
// in EmitGlobalVariable, otherwise we would not be able to handle cases
// where the got equivalent shows up before its use.
computeGlobalGOTEquivs(M);

// Emit global variables.
for (const auto &G : M.globals())
  EmitGlobalVariable(&G);
1
Calling 'AsmPrinter::EmitGlobalVariable'→

// Emit remaining GOT equivalent globals.
emitGlobalGOTEquivs();

// Emit visibility info for declarations
for (const Function &F : M) {
  if (!F.isDeclarationForLinker())
    continue;
  GlobalValue::VisibilityTypes V = F.getVisibility();
  if (V == GlobalValue::DefaultVisibility)
    continue;

  MCSymbol *Name = getSymbol(&F);
  EmitVisibility(Name, V, false);
}

// Emit the remarks section contents.
// FIXME: Figure out when is the safest time to emit this section. It should
// not come after debug info.
if (EnableRemarksSection)
  emitRemarksSection(M);

const TargetLoweringObjectFile &TLOF = getObjFileLowering();

TLOF.emitModuleMetadata(*OutStreamer, M);

if (TM.getTargetTriple().isOSBinFormatELF()) {
  MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();

  // Output stubs for external and common global variables.
  MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
  if (!Stubs.empty()) {
    OutStreamer->SwitchSection(TLOF.getDataSection());
    const DataLayout &DL = M.getDataLayout();

    EmitAlignment(Align(DL.getPointerSize()));
    for (const auto &Stub : Stubs) {
      OutStreamer->EmitLabel(Stub.first);
      OutStreamer->EmitSymbolValue(Stub.second.getPointer(),
                                   DL.getPointerSize());
    }
  }
}

if (TM.getTargetTriple().isOSBinFormatCOFF()) {
  MachineModuleInfoCOFF &MMICOFF =
      MMI->getObjFileInfo<MachineModuleInfoCOFF>();

  // Output stubs for external and common global variables.
  MachineModuleInfoCOFF::SymbolListTy Stubs = MMICOFF.GetGVStubList();
  if (!Stubs.empty()) {
    const DataLayout &DL = M.getDataLayout();

    for (const auto &Stub : Stubs) {
      SmallString<256> SectionName = StringRef(".rdata$");
      SectionName += Stub.first->getName();
      OutStreamer->SwitchSection(OutContext.getCOFFSection(
          SectionName,
          COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ |
              COFF::IMAGE_SCN_LNK_COMDAT,
          SectionKind::getReadOnly(), Stub.first->getName(),
          COFF::IMAGE_COMDAT_SELECT_ANY));
      EmitAlignment(Align(DL.getPointerSize()));
      OutStreamer->EmitSymbolAttribute(Stub.first, MCSA_Global);
      OutStreamer->EmitLabel(Stub.first);
      OutStreamer->EmitSymbolValue(Stub.second.getPointer(),
                                   DL.getPointerSize());
    }
  }
}

// Finalize debug and EH information.
for (const HandlerInfo &HI : Handlers) {
  NamedRegionTimer T(HI.TimerName, HI.TimerDescription, HI.TimerGroupName,
                     HI.TimerGroupDescription, TimePassesIsEnabled);
  HI.Handler->endModule();
}
Handlers.clear();
DD = nullptr;

// If the target wants to know about weak references, print them all.
if (MAI->getWeakRefDirective()) {
  // FIXME: This is not lazy, it would be nice to only print weak references
  // to stuff that is actually used.  Note that doing so would require targets
  // to notice uses in operands (due to constant exprs etc).  This should
  // happen with the MC stuff eventually.

  // Print out module-level global objects here.
  for (const auto &GO : M.global_objects()) {
    if (!GO.hasExternalWeakLinkage())
      continue;
    OutStreamer->EmitSymbolAttribute(getSymbol(&GO), MCSA_WeakReference);
  }
}

OutStreamer->AddBlankLine();

// Print aliases in topological order, that is, for each alias a = b,
// b must be printed before a.
// This is because on some targets (e.g. PowerPC) linker expects aliases in
// such an order to generate correct TOC information.
SmallVector<const GlobalAlias *, 16> AliasStack;
SmallPtrSet<const GlobalAlias *, 16> AliasVisited;
for (const auto &Alias : M.aliases()) {
  for (const GlobalAlias *Cur = &Alias; Cur;
       Cur = dyn_cast<GlobalAlias>(Cur->getAliasee())) {
    if (!AliasVisited.insert(Cur).second)
      break;
    AliasStack.push_back(Cur);
  }
  for (const GlobalAlias *AncestorAlias : llvm::reverse(AliasStack))
    emitGlobalIndirectSymbol(M, *AncestorAlias);
  AliasStack.clear();
}
for (const auto &IFunc : M.ifuncs())
  emitGlobalIndirectSymbol(M, IFunc);

GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
assert(MI && "AsmPrinter didn't require GCModuleInfo?")((MI && "AsmPrinter didn't require GCModuleInfo?") ? static_cast
<void> (0) : __assert_fail ("MI && \"AsmPrinter didn't require GCModuleInfo?\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 1521, __PRETTY_FUNCTION__));
for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
  if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(**--I))
    MP->finishAssembly(M, *MI, *this);

// Emit llvm.ident metadata in an '.ident' directive.
EmitModuleIdents(M);

// Emit bytes for llvm.commandline metadata.
EmitModuleCommandLines(M);

// Emit __morestack address if needed for indirect calls.
if (MMI->usesMorestackAddr()) {
  unsigned Align = 1;
  MCSection *ReadOnlySection = getObjFileLowering().getSectionForConstant(
      getDataLayout(), SectionKind::getReadOnly(),
      /*C=*/nullptr, Align);
  OutStreamer->SwitchSection(ReadOnlySection);

  MCSymbol *AddrSymbol =
      OutContext.getOrCreateSymbol(StringRef("__morestack_addr"));
  OutStreamer->EmitLabel(AddrSymbol);

  unsigned PtrSize = MAI->getCodePointerSize();
  OutStreamer->EmitSymbolValue(GetExternalSymbolSymbol("__morestack"),
                               PtrSize);
}

// Emit .note.GNU-split-stack and .note.GNU-no-split-stack sections if
// split-stack is used.
if (TM.getTargetTriple().isOSBinFormatELF() && MMI->hasSplitStack()) {
  OutStreamer->SwitchSection(
      OutContext.getELFSection(".note.GNU-split-stack", ELF::SHT_PROGBITS, 0));
  if (MMI->hasNosplitStack())
    OutStreamer->SwitchSection(
        OutContext.getELFSection(".note.GNU-no-split-stack", ELF::SHT_PROGBITS, 0));
}

// If we don't have any trampolines, then we don't require stack memory
// to be executable. Some targets have a directive to declare this.
Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
  if (MCSection *S = MAI->getNonexecutableStackSection(OutContext))
    OutStreamer->SwitchSection(S);

if (TM.getTargetTriple().isOSBinFormatCOFF()) {
  // Emit /EXPORT: flags for each exported global as necessary.
  const auto &TLOF = getObjFileLowering();
  std::string Flags;

  for (const GlobalValue &GV : M.global_values()) {
    raw_string_ostream OS(Flags);
    TLOF.emitLinkerFlagsForGlobal(OS, &GV);
    OS.flush();
    if (!Flags.empty()) {
      OutStreamer->SwitchSection(TLOF.getDrectveSection());
      OutStreamer->EmitBytes(Flags);
    }
    Flags.clear();
  }

  // Emit /INCLUDE: flags for each used global as necessary.
  if (const auto *LU = M.getNamedGlobal("llvm.used")) {
    assert(LU->hasInitializer() &&((LU->hasInitializer() && "expected llvm.used to have an initializer"
) ? static_cast<void> (0) : __assert_fail ("LU->hasInitializer() && \"expected llvm.used to have an initializer\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 1585, __PRETTY_FUNCTION__))
           "expected llvm.used to have an initializer")((LU->hasInitializer() && "expected llvm.used to have an initializer"
) ? static_cast<void> (0) : __assert_fail ("LU->hasInitializer() && \"expected llvm.used to have an initializer\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 1585, __PRETTY_FUNCTION__));
    assert(isa<ArrayType>(LU->getValueType()) &&((isa<ArrayType>(LU->getValueType()) && "expected llvm.used to be an array type"
) ? static_cast<void> (0) : __assert_fail ("isa<ArrayType>(LU->getValueType()) && \"expected llvm.used to be an array type\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 1587, __PRETTY_FUNCTION__))
           "expected llvm.used to be an array type")((isa<ArrayType>(LU->getValueType()) && "expected llvm.used to be an array type"
) ? static_cast<void> (0) : __assert_fail ("isa<ArrayType>(LU->getValueType()) && \"expected llvm.used to be an array type\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 1587, __PRETTY_FUNCTION__));
    if (const auto *A = cast<ConstantArray>(LU->getInitializer())) {
      for (const Value *Op : A->operands()) {
        const auto *GV = cast<GlobalValue>(Op->stripPointerCasts());
        // Global symbols with internal or private linkage are not visible to
        // the linker, and thus would cause an error when the linker tried to
        // preserve the symbol due to the `/include:` directive.
        if (GV->hasLocalLinkage())
          continue;

        raw_string_ostream OS(Flags);
        TLOF.emitLinkerFlagsForUsed(OS, GV);
        OS.flush();

        if (!Flags.empty()) {
          OutStreamer->SwitchSection(TLOF.getDrectveSection());
          OutStreamer->EmitBytes(Flags);
        }
        Flags.clear();
      }
    }
  }
}

if (TM.Options.EmitAddrsig) {
  // Emit address-significance attributes for all globals.
  OutStreamer->EmitAddrsig();
  for (const GlobalValue &GV : M.global_values())
    if (!GV.use_empty() && !GV.isThreadLocal() &&
        !GV.hasDLLImportStorageClass() && !GV.getName().startswith("llvm.") &&
        !GV.hasAtLeastLocalUnnamedAddr())
      OutStreamer->EmitAddrsigSym(getSymbol(&GV));
}

// Emit symbol partition specifications (ELF only).
if (TM.getTargetTriple().isOSBinFormatELF()) {
  unsigned UniqueID = 0;
  for (const GlobalValue &GV : M.global_values()) {
    if (!GV.hasPartition() || GV.isDeclarationForLinker() ||
        GV.getVisibility() != GlobalValue::DefaultVisibility)
      continue;

    OutStreamer->SwitchSection(OutContext.getELFSection(
        ".llvm_sympart", ELF::SHT_LLVM_SYMPART, 0, 0, "", ++UniqueID));
    OutStreamer->EmitBytes(GV.getPartition());
    OutStreamer->EmitZeros(1);
    OutStreamer->EmitValue(
        MCSymbolRefExpr::create(getSymbol(&GV), OutContext),
        MAI->getCodePointerSize());
  }
}

// Allow the target to emit any magic that it wants at the end of the file,
// after everything else has gone out.
EmitEndOfAsmFile(M);

MMI = nullptr;

OutStreamer->Finish();
OutStreamer->reset();
OwnedMLI.reset();
OwnedMDT.reset();

return false;
1651}

1653MCSymbol *AsmPrinter::getCurExceptionSym() {
if (!CurExceptionSym)
  CurExceptionSym = createTempSymbol("exception");
return CurExceptionSym;
1657}

1659void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
this->MF = &MF;

// Get the function symbol.
if (MAI->needsFunctionDescriptors()) {
  assert(TM.getTargetTriple().isOSAIX() && "Function descriptor is only"((TM.getTargetTriple().isOSAIX() && "Function descriptor is only"
 " supported on AIX.") ? static_cast<void> (0) : __assert_fail
 ("TM.getTargetTriple().isOSAIX() && \"Function descriptor is only\" \" supported on AIX.\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 1665, __PRETTY_FUNCTION__))
                                           " supported on AIX.")((TM.getTargetTriple().isOSAIX() && "Function descriptor is only"
 " supported on AIX.") ? static_cast<void> (0) : __assert_fail
 ("TM.getTargetTriple().isOSAIX() && \"Function descriptor is only\" \" supported on AIX.\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 1665, __PRETTY_FUNCTION__));
  assert(CurrentFnDescSym && "The function descriptor symbol needs to be"((CurrentFnDescSym && "The function descriptor symbol needs to be"
 " initalized first.") ? static_cast<void> (0) : __assert_fail
 ("CurrentFnDescSym && \"The function descriptor symbol needs to be\" \" initalized first.\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 1667, __PRETTY_FUNCTION__))
                           " initalized first.")((CurrentFnDescSym && "The function descriptor symbol needs to be"
 " initalized first.") ? static_cast<void> (0) : __assert_fail
 ("CurrentFnDescSym && \"The function descriptor symbol needs to be\" \" initalized first.\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 1667, __PRETTY_FUNCTION__));

  // Get the function entry point symbol.
  CurrentFnSym =
      OutContext.getOrCreateSymbol("." + CurrentFnDescSym->getName());

  const Function &F = MF.getFunction();
  MCSectionXCOFF *FnEntryPointSec =
      cast<MCSectionXCOFF>(getObjFileLowering().SectionForGlobal(&F, TM));
  // Set the containing csect.
  cast<MCSymbolXCOFF>(CurrentFnSym)->setContainingCsect(FnEntryPointSec);
} else {
  CurrentFnSym = getSymbol(&MF.getFunction());
}

CurrentFnSymForSize = CurrentFnSym;
CurrentFnBegin = nullptr;
CurExceptionSym = nullptr;
bool NeedsLocalForSize = MAI->needsLocalForSize();
if (needFuncLabelsForEHOrDebugInfo(MF, MMI) || NeedsLocalForSize ||
    MF.getTarget().Options.EmitStackSizeSection) {
  CurrentFnBegin = createTempSymbol("func_begin");
  if (NeedsLocalForSize)
    CurrentFnSymForSize = CurrentFnBegin;
}

ORE = &getAnalysis<MachineOptimizationRemarkEmitterPass>().getORE();
1694}

1696namespace {

1698// Keep track the alignment, constpool entries per Section.
struct SectionCPs {
  MCSection *S;
  unsigned Alignment;
  SmallVector<unsigned, 4> CPEs;

  SectionCPs(MCSection *s, unsigned a) : S(s), Alignment(a) {}
};

1707} // end anonymous namespace

1709/// EmitConstantPool - Print to the current output stream assembly
1710/// representations of the constants in the constant pool MCP. This is
1711/// used to print out constants which have been "spilled to memory" by
1712/// the code generator.
1713void AsmPrinter::EmitConstantPool() {
const MachineConstantPool *MCP = MF->getConstantPool();
const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
if (CP.empty()) return;

// Calculate sections for constant pool entries. We collect entries to go into
// the same section together to reduce amount of section switch statements.
SmallVector<SectionCPs, 4> CPSections;
for (unsigned i = 0, e = CP.size(); i != e; ++i) {
  const MachineConstantPoolEntry &CPE = CP[i];
  unsigned Align = CPE.getAlignment();

  SectionKind Kind = CPE.getSectionKind(&getDataLayout());

  const Constant *C = nullptr;
  if (!CPE.isMachineConstantPoolEntry())
    C = CPE.Val.ConstVal;

  MCSection *S = getObjFileLowering().getSectionForConstant(getDataLayout(),
                                                            Kind, C, Align);

  // The number of sections are small, just do a linear search from the
  // last section to the first.
  bool Found = false;
  unsigned SecIdx = CPSections.size();
  while (SecIdx != 0) {
    if (CPSections[--SecIdx].S == S) {
      Found = true;
      break;
    }
  }
  if (!Found) {
    SecIdx = CPSections.size();
    CPSections.push_back(SectionCPs(S, Align));
  }

  if (Align > CPSections[SecIdx].Alignment)
    CPSections[SecIdx].Alignment = Align;
  CPSections[SecIdx].CPEs.push_back(i);
}

// Now print stuff into the calculated sections.
const MCSection *CurSection = nullptr;
unsigned Offset = 0;
for (unsigned i = 0, e = CPSections.size(); i != e; ++i) {
  for (unsigned j = 0, ee = CPSections[i].CPEs.size(); j != ee; ++j) {
    unsigned CPI = CPSections[i].CPEs[j];
    MCSymbol *Sym = GetCPISymbol(CPI);
    if (!Sym->isUndefined())
      continue;

    if (CurSection != CPSections[i].S) {
      OutStreamer->SwitchSection(CPSections[i].S);
      EmitAlignment(Align(CPSections[i].Alignment));
      CurSection = CPSections[i].S;
      Offset = 0;
    }

    MachineConstantPoolEntry CPE = CP[CPI];

    // Emit inter-object padding for alignment.
    unsigned AlignMask = CPE.getAlignment() - 1;
    unsigned NewOffset = (Offset + AlignMask) & ~AlignMask;
    OutStreamer->EmitZeros(NewOffset - Offset);

    Type *Ty = CPE.getType();
    Offset = NewOffset + getDataLayout().getTypeAllocSize(Ty);

    OutStreamer->EmitLabel(Sym);
    if (CPE.isMachineConstantPoolEntry())
      EmitMachineConstantPoolValue(CPE.Val.MachineCPVal);
    else
      EmitGlobalConstant(getDataLayout(), CPE.Val.ConstVal);
  }
}
1788}

1790/// EmitJumpTableInfo - Print assembly representations of the jump tables used
1791/// by the current function to the current output stream.
1792void AsmPrinter::EmitJumpTableInfo() {
const DataLayout &DL = MF->getDataLayout();
const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
if (!MJTI) return;
if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_Inline) return;
const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
if (JT.empty()) return;

// Pick the directive to use to print the jump table entries, and switch to
// the appropriate section.
const Function &F = MF->getFunction();
const TargetLoweringObjectFile &TLOF = getObjFileLowering();
bool JTInDiffSection = !TLOF.shouldPutJumpTableInFunctionSection(
    MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32,
    F);
if (JTInDiffSection) {
  // Drop it in the readonly section.
  MCSection *ReadOnlySection = TLOF.getSectionForJumpTable(F, TM);
  OutStreamer->SwitchSection(ReadOnlySection);
}

EmitAlignment(Align(MJTI->getEntryAlignment(DL)));

// Jump tables in code sections are marked with a data_region directive
// where that's supported.
if (!JTInDiffSection)
  OutStreamer->EmitDataRegion(MCDR_DataRegionJT32);

for (unsigned JTI = 0, e = JT.size(); JTI != e; ++JTI) {
  const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;

  // If this jump table was deleted, ignore it.
  if (JTBBs.empty()) continue;

  // For the EK_LabelDifference32 entry, if using .set avoids a relocation,
  /// emit a .set directive for each unique entry.
  if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 &&
      MAI->doesSetDirectiveSuppressReloc()) {
    SmallPtrSet<const MachineBasicBlock*, 16> EmittedSets;
    const TargetLowering *TLI = MF->getSubtarget().getTargetLowering();
    const MCExpr *Base = TLI->getPICJumpTableRelocBaseExpr(MF,JTI,OutContext);
    for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
      const MachineBasicBlock *MBB = JTBBs[ii];
      if (!EmittedSets.insert(MBB).second)
        continue;

      // .set LJTSet, LBB32-base
      const MCExpr *LHS =
        MCSymbolRefExpr::create(MBB->getSymbol(), OutContext);
      OutStreamer->EmitAssignment(GetJTSetSymbol(JTI, MBB->getNumber()),
                                  MCBinaryExpr::createSub(LHS, Base,
                                                          OutContext));
    }
  }

  // On some targets (e.g. Darwin) we want to emit two consecutive labels
  // before each jump table.  The first label is never referenced, but tells
  // the assembler and linker the extents of the jump table object.  The
  // second label is actually referenced by the code.
  if (JTInDiffSection && DL.hasLinkerPrivateGlobalPrefix())
    // FIXME: This doesn't have to have any specific name, just any randomly
    // named and numbered 'l' label would work.  Simplify GetJTISymbol.
    OutStreamer->EmitLabel(GetJTISymbol(JTI, true));

  OutStreamer->EmitLabel(GetJTISymbol(JTI));

  for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
    EmitJumpTableEntry(MJTI, JTBBs[ii], JTI);
}
if (!JTInDiffSection)
  OutStreamer->EmitDataRegion(MCDR_DataRegionEnd);
1863}

1865/// EmitJumpTableEntry - Emit a jump table entry for the specified MBB to the
1866/// current stream.
1867void AsmPrinter::EmitJumpTableEntry(const MachineJumpTableInfo *MJTI,
                                  const MachineBasicBlock *MBB,
                                  unsigned UID) const {
assert(MBB && MBB->getNumber() >= 0 && "Invalid basic block")((MBB && MBB->getNumber() >= 0 && "Invalid basic block"
) ? static_cast<void> (0) : __assert_fail ("MBB && MBB->getNumber() >= 0 && \"Invalid basic block\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 1870, __PRETTY_FUNCTION__));
const MCExpr *Value = nullptr;
switch (MJTI->getEntryKind()) {
case MachineJumpTableInfo::EK_Inline:
  llvm_unreachable("Cannot emit EK_Inline jump table entry")::llvm::llvm_unreachable_internal("Cannot emit EK_Inline jump table entry"
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 1874);
case MachineJumpTableInfo::EK_Custom32:
  Value = MF->getSubtarget().getTargetLowering()->LowerCustomJumpTableEntry(
      MJTI, MBB, UID, OutContext);
  break;
case MachineJumpTableInfo::EK_BlockAddress:
  // EK_BlockAddress - Each entry is a plain address of block, e.g.:
  //     .word LBB123
  Value = MCSymbolRefExpr::create(MBB->getSymbol(), OutContext);
  break;
case MachineJumpTableInfo::EK_GPRel32BlockAddress: {
  // EK_GPRel32BlockAddress - Each entry is an address of block, encoded
  // with a relocation as gp-relative, e.g.:
  //     .gprel32 LBB123
  MCSymbol *MBBSym = MBB->getSymbol();
  OutStreamer->EmitGPRel32Value(MCSymbolRefExpr::create(MBBSym, OutContext));
  return;
}

case MachineJumpTableInfo::EK_GPRel64BlockAddress: {
  // EK_GPRel64BlockAddress - Each entry is an address of block, encoded
  // with a relocation as gp-relative, e.g.:
  //     .gpdword LBB123
  MCSymbol *MBBSym = MBB->getSymbol();
  OutStreamer->EmitGPRel64Value(MCSymbolRefExpr::create(MBBSym, OutContext));
  return;
}

case MachineJumpTableInfo::EK_LabelDifference32: {
  // Each entry is the address of the block minus the address of the jump
  // table. This is used for PIC jump tables where gprel32 is not supported.
  // e.g.:
  //      .word LBB123 - LJTI1_2
  // If the .set directive avoids relocations, this is emitted as:
  //      .set L4_5_set_123, LBB123 - LJTI1_2
  //      .word L4_5_set_123
  if (MAI->doesSetDirectiveSuppressReloc()) {
    Value = MCSymbolRefExpr::create(GetJTSetSymbol(UID, MBB->getNumber()),
                                    OutContext);
    break;
  }
  Value = MCSymbolRefExpr::create(MBB->getSymbol(), OutContext);
  const TargetLowering *TLI = MF->getSubtarget().getTargetLowering();
  const MCExpr *Base = TLI->getPICJumpTableRelocBaseExpr(MF, UID, OutContext);
  Value = MCBinaryExpr::createSub(Value, Base, OutContext);
  break;
}
}

assert(Value && "Unknown entry kind!")((Value && "Unknown entry kind!") ? static_cast<void
> (0) : __assert_fail ("Value && \"Unknown entry kind!\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 1923, __PRETTY_FUNCTION__));

unsigned EntrySize = MJTI->getEntrySize(getDataLayout());
OutStreamer->EmitValue(Value, EntrySize);
1927}

1929/// EmitSpecialLLVMGlobal - Check to see if the specified global is a
1930/// special global used by LLVM.  If so, emit it and return true, otherwise
1931/// do nothing and return false.
1932bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
if (GV->getName() == "llvm.used") {
  if (MAI->hasNoDeadStrip())    // No need to emit this at all.
    EmitLLVMUsedList(cast<ConstantArray>(GV->getInitializer()));
  return true;
}

// Ignore debug and non-emitted data.  This handles llvm.compiler.used.
if (GV->getSection() == "llvm.metadata" ||
    GV->hasAvailableExternallyLinkage())
  return true;

if (!GV->hasAppendingLinkage()) return false;

assert(GV->hasInitializer() && "Not a special LLVM global!")((GV->hasInitializer() && "Not a special LLVM global!"
) ? static_cast<void> (0) : __assert_fail ("GV->hasInitializer() && \"Not a special LLVM global!\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 1946, __PRETTY_FUNCTION__));

if (GV->getName() == "llvm.global_ctors") {
  EmitXXStructorList(GV->getParent()->getDataLayout(), GV->getInitializer(),
                     /* isCtor */ true);

  return true;
}

if (GV->getName() == "llvm.global_dtors") {
  EmitXXStructorList(GV->getParent()->getDataLayout(), GV->getInitializer(),
                     /* isCtor */ false);

  return true;
}

report_fatal_error("unknown special variable");
1963}

1965/// EmitLLVMUsedList - For targets that define a MAI::UsedDirective, mark each
1966/// global in the specified llvm.used list.
1967void AsmPrinter::EmitLLVMUsedList(const ConstantArray *InitList) {
// Should be an array of 'i8*'.
for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
  const GlobalValue *GV =
    dyn_cast<GlobalValue>(InitList->getOperand(i)->stripPointerCasts());
  if (GV)
    OutStreamer->EmitSymbolAttribute(getSymbol(GV), MCSA_NoDeadStrip);
}
1975}

1977namespace {

1979struct Structor {
int Priority = 0;
Constant *Func = nullptr;
GlobalValue *ComdatKey = nullptr;

Structor() = default;
1985};

1987} // end anonymous namespace

1989/// EmitXXStructorList - Emit the ctor or dtor list taking into account the init
1990/// priority.
1991void AsmPrinter::EmitXXStructorList(const DataLayout &DL, const Constant *List,
                                  bool isCtor) {
// Should be an array of '{ i32, void ()*, i8* }' structs.  The first value is the
// init priority.
if (!isa<ConstantArray>(List)) return;

// Sanity check the structors list.
const ConstantArray *InitList = dyn_cast<ConstantArray>(List);
if (!InitList) return; // Not an array!
StructType *ETy = dyn_cast<StructType>(InitList->getType()->getElementType());
if (!ETy || ETy->getNumElements() != 3 ||
    !isa<IntegerType>(ETy->getTypeAtIndex(0U)) ||
    !isa<PointerType>(ETy->getTypeAtIndex(1U)) ||
    !isa<PointerType>(ETy->getTypeAtIndex(2U)))
  return; // Not (int, ptr, ptr).

// Gather the structors in a form that's convenient for sorting by priority.
SmallVector<Structor, 8> Structors;
for (Value *O : InitList->operands()) {
  ConstantStruct *CS = dyn_cast<ConstantStruct>(O);
  if (!CS) continue; // Malformed.
  if (CS->getOperand(1)->isNullValue())
    break;  // Found a null terminator, skip the rest.
  ConstantInt *Priority = dyn_cast<ConstantInt>(CS->getOperand(0));
  if (!Priority) continue; // Malformed.
  Structors.push_back(Structor());
  Structor &S = Structors.back();
  S.Priority = Priority->getLimitedValue(65535);
  S.Func = CS->getOperand(1);
  if (!CS->getOperand(2)->isNullValue())
    S.ComdatKey =
        dyn_cast<GlobalValue>(CS->getOperand(2)->stripPointerCasts());
}

// Emit the function pointers in the target-specific order
llvm::stable_sort(Structors, [](const Structor &L, const Structor &R) {
  return L.Priority < R.Priority;
});
const Align Align = DL.getPointerPrefAlignment();
for (Structor &S : Structors) {
  const TargetLoweringObjectFile &Obj = getObjFileLowering();
  const MCSymbol *KeySym = nullptr;
  if (GlobalValue *GV = S.ComdatKey) {
    if (GV->isDeclarationForLinker())
      // If the associated variable is not defined in this module
      // (it might be available_externally, or have been an
      // available_externally definition that was dropped by the
      // EliminateAvailableExternally pass), some other TU
      // will provide its dynamic initializer.
      continue;

    KeySym = getSymbol(GV);
  }
  MCSection *OutputSection =
      (isCtor ? Obj.getStaticCtorSection(S.Priority, KeySym)
              : Obj.getStaticDtorSection(S.Priority, KeySym));
  OutStreamer->SwitchSection(OutputSection);
  if (OutStreamer->getCurrentSection() != OutStreamer->getPreviousSection())
    EmitAlignment(Align);
  EmitXXStructor(DL, S.Func);
}
2052}

2054void AsmPrinter::EmitModuleIdents(Module &M) {
if (!MAI->hasIdentDirective())
  return;

if (const NamedMDNode *NMD = M.getNamedMetadata("llvm.ident")) {
  for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
    const MDNode *N = NMD->getOperand(i);
    assert(N->getNumOperands() == 1 &&((N->getNumOperands() == 1 && "llvm.ident metadata entry can have only one operand"
) ? static_cast<void> (0) : __assert_fail ("N->getNumOperands() == 1 && \"llvm.ident metadata entry can have only one operand\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2062, __PRETTY_FUNCTION__))
           "llvm.ident metadata entry can have only one operand")((N->getNumOperands() == 1 && "llvm.ident metadata entry can have only one operand"
) ? static_cast<void> (0) : __assert_fail ("N->getNumOperands() == 1 && \"llvm.ident metadata entry can have only one operand\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2062, __PRETTY_FUNCTION__));
    const MDString *S = cast<MDString>(N->getOperand(0));
    OutStreamer->EmitIdent(S->getString());
  }
}
2067}

2069void AsmPrinter::EmitModuleCommandLines(Module &M) {
MCSection *CommandLine = getObjFileLowering().getSectionForCommandLines();
if (!CommandLine)
  return;

const NamedMDNode *NMD = M.getNamedMetadata("llvm.commandline");
if (!NMD || !NMD->getNumOperands())
  return;

OutStreamer->PushSection();
OutStreamer->SwitchSection(CommandLine);
OutStreamer->EmitZeros(1);
for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
  const MDNode *N = NMD->getOperand(i);
  assert(N->getNumOperands() == 1 &&((N->getNumOperands() == 1 && "llvm.commandline metadata entry can have only one operand"
) ? static_cast<void> (0) : __assert_fail ("N->getNumOperands() == 1 && \"llvm.commandline metadata entry can have only one operand\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2084, __PRETTY_FUNCTION__))
         "llvm.commandline metadata entry can have only one operand")((N->getNumOperands() == 1 && "llvm.commandline metadata entry can have only one operand"
) ? static_cast<void> (0) : __assert_fail ("N->getNumOperands() == 1 && \"llvm.commandline metadata entry can have only one operand\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2084, __PRETTY_FUNCTION__));
  const MDString *S = cast<MDString>(N->getOperand(0));
  OutStreamer->EmitBytes(S->getString());
  OutStreamer->EmitZeros(1);
}
OutStreamer->PopSection();
2090}

2092//===--------------------------------------------------------------------===//
2093// Emission and print routines
2094//

2096/// Emit a byte directive and value.
2097///
2098void AsmPrinter::emitInt8(int Value) const {
OutStreamer->EmitIntValue(Value, 1);
2100}

2102/// Emit a short directive and value.
2103void AsmPrinter::emitInt16(int Value) const {
OutStreamer->EmitIntValue(Value, 2);
2105}

2107/// Emit a long directive and value.
2108void AsmPrinter::emitInt32(int Value) const {
OutStreamer->EmitIntValue(Value, 4);
2110}

2112/// Emit a long long directive and value.
2113void AsmPrinter::emitInt64(uint64_t Value) const {
OutStreamer->EmitIntValue(Value, 8);
2115}

2117/// Emit something like ".long Hi-Lo" where the size in bytes of the directive
2118/// is specified by Size and Hi/Lo specify the labels. This implicitly uses
2119/// .set if it avoids relocations.
2120void AsmPrinter::EmitLabelDifference(const MCSymbol *Hi, const MCSymbol *Lo,
                                   unsigned Size) const {
OutStreamer->emitAbsoluteSymbolDiff(Hi, Lo, Size);
2123}

2125/// EmitLabelPlusOffset - Emit something like ".long Label+Offset"
2126/// where the size in bytes of the directive is specified by Size and Label
2127/// specifies the label.  This implicitly uses .set if it is available.
2128void AsmPrinter::EmitLabelPlusOffset(const MCSymbol *Label, uint64_t Offset,
                                   unsigned Size,
                                   bool IsSectionRelative) const {
if (MAI->needsDwarfSectionOffsetDirective() && IsSectionRelative) {
  OutStreamer->EmitCOFFSecRel32(Label, Offset);
  if (Size > 4)
    OutStreamer->EmitZeros(Size - 4);
  return;
}

// Emit Label+Offset (or just Label if Offset is zero)
const MCExpr *Expr = MCSymbolRefExpr::create(Label, OutContext);
if (Offset)
  Expr = MCBinaryExpr::createAdd(
      Expr, MCConstantExpr::create(Offset, OutContext), OutContext);

OutStreamer->EmitValue(Expr, Size);
2145}

2147//===----------------------------------------------------------------------===//

2149// EmitAlignment - Emit an alignment directive to the specified power of
2150// two boundary.  If a global value is specified, and if that global has
2151// an explicit alignment requested, it will override the alignment request
2152// if required for correctness.
2153void AsmPrinter::EmitAlignment(Align Alignment, const GlobalObject *GV) const {
if (GV)
  Alignment = getGVAlignment(GV, GV->getParent()->getDataLayout(), Alignment);

if (Alignment == Align::None())
  return; // 1-byte aligned: no need to emit alignment.

if (getCurrentSection()->getKind().isText())
  OutStreamer->EmitCodeAlignment(Alignment.value());
else
  OutStreamer->EmitValueToAlignment(Alignment.value());
2164}

2166//===----------------------------------------------------------------------===//
2167// Constant emission.
2168//===----------------------------------------------------------------------===//

2170const MCExpr *AsmPrinter::lowerConstant(const Constant *CV) {
MCContext &Ctx = OutContext;

if (CV->isNullValue() || isa<UndefValue>(CV))
  return MCConstantExpr::create(0, Ctx);

if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV))
  return MCConstantExpr::create(CI->getZExtValue(), Ctx);

if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
  return MCSymbolRefExpr::create(getSymbol(GV), Ctx);

if (const BlockAddress *BA = dyn_cast<BlockAddress>(CV))
  return MCSymbolRefExpr::create(GetBlockAddressSymbol(BA), Ctx);

const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV);
if (!CE) {
  llvm_unreachable("Unknown constant value to lower!")::llvm::llvm_unreachable_internal("Unknown constant value to lower!"
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2187);
}

switch (CE->getOpcode()) {
default:
  // If the code isn't optimized, there may be outstanding folding
  // opportunities. Attempt to fold the expression using DataLayout as a
  // last resort before giving up.
  if (Constant *C = ConstantFoldConstant(CE, getDataLayout()))
    if (C != CE)
      return lowerConstant(C);

  // Otherwise report the problem to the user.
  {
    std::string S;
    raw_string_ostream OS(S);
    OS << "Unsupported expression in static initializer: ";
    CE->printAsOperand(OS, /*PrintType=*/false,
                   !MF ? nullptr : MF->getFunction().getParent());
    report_fatal_error(OS.str());
  }
case Instruction::GetElementPtr: {
  // Generate a symbolic expression for the byte address
  APInt OffsetAI(getDataLayout().getPointerTypeSizeInBits(CE->getType()), 0);
  cast<GEPOperator>(CE)->accumulateConstantOffset(getDataLayout(), OffsetAI);

  const MCExpr *Base = lowerConstant(CE->getOperand(0));
  if (!OffsetAI)
    return Base;

  int64_t Offset = OffsetAI.getSExtValue();
  return MCBinaryExpr::createAdd(Base, MCConstantExpr::create(Offset, Ctx),
                                 Ctx);
}

case Instruction::Trunc:
  // We emit the value and depend on the assembler to truncate the generated
  // expression properly.  This is important for differences between
  // blockaddress labels.  Since the two labels are in the same function, it
  // is reasonable to treat their delta as a 32-bit value.
  LLVM_FALLTHROUGH[[gnu::fallthrough]];
case Instruction::BitCast:
  return lowerConstant(CE->getOperand(0));

case Instruction::IntToPtr: {
  const DataLayout &DL = getDataLayout();

  // Handle casts to pointers by changing them into casts to the appropriate
  // integer type.  This promotes constant folding and simplifies this code.
  Constant *Op = CE->getOperand(0);
  Op = ConstantExpr::getIntegerCast(Op, DL.getIntPtrType(CV->getType()),
                                    false/*ZExt*/);
  return lowerConstant(Op);
}

case Instruction::PtrToInt: {
  const DataLayout &DL = getDataLayout();

  // Support only foldable casts to/from pointers that can be eliminated by
  // changing the pointer to the appropriately sized integer type.
  Constant *Op = CE->getOperand(0);
  Type *Ty = CE->getType();

  const MCExpr *OpExpr = lowerConstant(Op);

  // We can emit the pointer value into this slot if the slot is an
  // integer slot equal to the size of the pointer.
  //
  // If the pointer is larger than the resultant integer, then
  // as with Trunc just depend on the assembler to truncate it.
  if (DL.getTypeAllocSize(Ty) <= DL.getTypeAllocSize(Op->getType()))
    return OpExpr;

  // Otherwise the pointer is smaller than the resultant integer, mask off
  // the high bits so we are sure to get a proper truncation if the input is
  // a constant expr.
  unsigned InBits = DL.getTypeAllocSizeInBits(Op->getType());
  const MCExpr *MaskExpr = MCConstantExpr::create(~0ULL >> (64-InBits), Ctx);
  return MCBinaryExpr::createAnd(OpExpr, MaskExpr, Ctx);
}

case Instruction::Sub: {
  GlobalValue *LHSGV;
  APInt LHSOffset;
  if (IsConstantOffsetFromGlobal(CE->getOperand(0), LHSGV, LHSOffset,
                                 getDataLayout())) {
    GlobalValue *RHSGV;
    APInt RHSOffset;
    if (IsConstantOffsetFromGlobal(CE->getOperand(1), RHSGV, RHSOffset,
                                   getDataLayout())) {
      const MCExpr *RelocExpr =
          getObjFileLowering().lowerRelativeReference(LHSGV, RHSGV, TM);
      if (!RelocExpr)
        RelocExpr = MCBinaryExpr::createSub(
            MCSymbolRefExpr::create(getSymbol(LHSGV), Ctx),
            MCSymbolRefExpr::create(getSymbol(RHSGV), Ctx), Ctx);
      int64_t Addend = (LHSOffset - RHSOffset).getSExtValue();
      if (Addend != 0)
        RelocExpr = MCBinaryExpr::createAdd(
            RelocExpr, MCConstantExpr::create(Addend, Ctx), Ctx);
      return RelocExpr;
    }
  }
}
// else fallthrough
LLVM_FALLTHROUGH[[gnu::fallthrough]];

// The MC library also has a right-shift operator, but it isn't consistently
// signed or unsigned between different targets.
case Instruction::Add:
case Instruction::Mul:
case Instruction::SDiv:
case Instruction::SRem:
case Instruction::Shl:
case Instruction::And:
case Instruction::Or:
case Instruction::Xor: {
  const MCExpr *LHS = lowerConstant(CE->getOperand(0));
  const MCExpr *RHS = lowerConstant(CE->getOperand(1));
  switch (CE->getOpcode()) {
  default: llvm_unreachable("Unknown binary operator constant cast expr")::llvm::llvm_unreachable_internal("Unknown binary operator constant cast expr"
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2307);
  case Instruction::Add: return MCBinaryExpr::createAdd(LHS, RHS, Ctx);
  case Instruction::Sub: return MCBinaryExpr::createSub(LHS, RHS, Ctx);
  case Instruction::Mul: return MCBinaryExpr::createMul(LHS, RHS, Ctx);
  case Instruction::SDiv: return MCBinaryExpr::createDiv(LHS, RHS, Ctx);
  case Instruction::SRem: return MCBinaryExpr::createMod(LHS, RHS, Ctx);
  case Instruction::Shl: return MCBinaryExpr::createShl(LHS, RHS, Ctx);
  case Instruction::And: return MCBinaryExpr::createAnd(LHS, RHS, Ctx);
  case Instruction::Or:  return MCBinaryExpr::createOr (LHS, RHS, Ctx);
  case Instruction::Xor: return MCBinaryExpr::createXor(LHS, RHS, Ctx);
  }
}
}
2320}

2322static void emitGlobalConstantImpl(const DataLayout &DL, const Constant *C,
                                 AsmPrinter &AP,
                                 const Constant *BaseCV = nullptr,
                                 uint64_t Offset = 0);

2327static void emitGlobalConstantFP(const ConstantFP *CFP, AsmPrinter &AP);
2328static void emitGlobalConstantFP(APFloat APF, Type *ET, AsmPrinter &AP);

2330/// isRepeatedByteSequence - Determine whether the given value is
2331/// composed of a repeated sequence of identical bytes and return the
2332/// byte value.  If it is not a repeated sequence, return -1.
2333static int isRepeatedByteSequence(const ConstantDataSequential *V) {
StringRef Data = V->getRawDataValues();
assert(!Data.empty() && "Empty aggregates should be CAZ node")((!Data.empty() && "Empty aggregates should be CAZ node"
) ? static_cast<void> (0) : __assert_fail ("!Data.empty() && \"Empty aggregates should be CAZ node\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2335, __PRETTY_FUNCTION__));
char C = Data[0];
for (unsigned i = 1, e = Data.size(); i != e; ++i)
  if (Data[i] != C) return -1;
return static_cast<uint8_t>(C); // Ensure 255 is not returned as -1.
2340}

2342/// isRepeatedByteSequence - Determine whether the given value is
2343/// composed of a repeated sequence of identical bytes and return the
2344/// byte value.  If it is not a repeated sequence, return -1.
2345static int isRepeatedByteSequence(const Value *V, const DataLayout &DL) {
if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
  uint64_t Size = DL.getTypeAllocSizeInBits(V->getType());
  assert(Size % 8 == 0)((Size % 8 == 0) ? static_cast<void> (0) : __assert_fail
 ("Size % 8 == 0", "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2348, __PRETTY_FUNCTION__));

  // Extend the element to take zero padding into account.
  APInt Value = CI->getValue().zextOrSelf(Size);
  if (!Value.isSplat(8))
    return -1;

  return Value.zextOrTrunc(8).getZExtValue();
}
if (const ConstantArray *CA = dyn_cast<ConstantArray>(V)) {
  // Make sure all array elements are sequences of the same repeated
  // byte.
  assert(CA->getNumOperands() != 0 && "Should be a CAZ")((CA->getNumOperands() != 0 && "Should be a CAZ") ?
 static_cast<void> (0) : __assert_fail ("CA->getNumOperands() != 0 && \"Should be a CAZ\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2360, __PRETTY_FUNCTION__));
  Constant *Op0 = CA->getOperand(0);
  int Byte = isRepeatedByteSequence(Op0, DL);
  if (Byte == -1)
    return -1;

  // All array elements must be equal.
  for (unsigned i = 1, e = CA->getNumOperands(); i != e; ++i)
    if (CA->getOperand(i) != Op0)
      return -1;
  return Byte;
}

if (const ConstantDataSequential *CDS = dyn_cast<ConstantDataSequential>(V))
  return isRepeatedByteSequence(CDS);

return -1;
2377}

2379static void emitGlobalConstantDataSequential(const DataLayout &DL,
                                           const ConstantDataSequential *CDS,
                                           AsmPrinter &AP) {
// See if we can aggregate this into a .fill, if so, emit it as such.
int Value = isRepeatedByteSequence(CDS, DL);
if (Value != -1) {
  uint64_t Bytes = DL.getTypeAllocSize(CDS->getType());
  // Don't emit a 1-byte object as a .fill.
  if (Bytes > 1)
    return AP.OutStreamer->emitFill(Bytes, Value);
}

// If this can be emitted with .ascii/.asciz, emit it as such.
if (CDS->isString())
  return AP.OutStreamer->EmitBytes(CDS->getAsString());

// Otherwise, emit the values in successive locations.
unsigned ElementByteSize = CDS->getElementByteSize();
if (isa<IntegerType>(CDS->getElementType())) {
  for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) {
    if (AP.isVerbose())
      AP.OutStreamer->GetCommentOS() << format("0x%" PRIx64"l" "x" "\n",
                                               CDS->getElementAsInteger(i));
    AP.OutStreamer->EmitIntValue(CDS->getElementAsInteger(i),
                                 ElementByteSize);
  }
} else {
  Type *ET = CDS->getElementType();
  for (unsigned I = 0, E = CDS->getNumElements(); I != E; ++I)
    emitGlobalConstantFP(CDS->getElementAsAPFloat(I), ET, AP);
}

unsigned Size = DL.getTypeAllocSize(CDS->getType());
unsigned EmittedSize = DL.getTypeAllocSize(CDS->getType()->getElementType()) *
                      CDS->getNumElements();
assert(EmittedSize <= Size && "Size cannot be less than EmittedSize!")((EmittedSize <= Size && "Size cannot be less than EmittedSize!"
) ? static_cast<void> (0) : __assert_fail ("EmittedSize <= Size && \"Size cannot be less than EmittedSize!\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2414, __PRETTY_FUNCTION__));
if (unsigned Padding = Size - EmittedSize)
  AP.OutStreamer->EmitZeros(Padding);
2417}

2419static void emitGlobalConstantArray(const DataLayout &DL,
                                  const ConstantArray *CA, AsmPrinter &AP,
                                  const Constant *BaseCV, uint64_t Offset) {
// See if we can aggregate some values.  Make sure it can be
// represented as a series of bytes of the constant value.
int Value = isRepeatedByteSequence(CA, DL);

if (Value != -1) {
  uint64_t Bytes = DL.getTypeAllocSize(CA->getType());
  AP.OutStreamer->emitFill(Bytes, Value);
}
else {
  for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i) {
    emitGlobalConstantImpl(DL, CA->getOperand(i), AP, BaseCV, Offset);
    Offset += DL.getTypeAllocSize(CA->getOperand(i)->getType());
  }
}
2436}

2438static void emitGlobalConstantVector(const DataLayout &DL,
                                   const ConstantVector *CV, AsmPrinter &AP) {
for (unsigned i = 0, e = CV->getType()->getNumElements(); i != e; ++i)
  emitGlobalConstantImpl(DL, CV->getOperand(i), AP);

unsigned Size = DL.getTypeAllocSize(CV->getType());
unsigned EmittedSize = DL.getTypeAllocSize(CV->getType()->getElementType()) *
                       CV->getType()->getNumElements();
if (unsigned Padding = Size - EmittedSize)
  AP.OutStreamer->EmitZeros(Padding);
2448}

2450static void emitGlobalConstantStruct(const DataLayout &DL,
                                   const ConstantStruct *CS, AsmPrinter &AP,
                                   const Constant *BaseCV, uint64_t Offset) {
// Print the fields in successive locations. Pad to align if needed!
unsigned Size = DL.getTypeAllocSize(CS->getType());
const StructLayout *Layout = DL.getStructLayout(CS->getType());
uint64_t SizeSoFar = 0;
for (unsigned i = 0, e = CS->getNumOperands(); i != e; ++i) {
  const Constant *Field = CS->getOperand(i);

  // Print the actual field value.
  emitGlobalConstantImpl(DL, Field, AP, BaseCV, Offset + SizeSoFar);

  // Check if padding is needed and insert one or more 0s.
  uint64_t FieldSize = DL.getTypeAllocSize(Field->getType());
  uint64_t PadSize = ((i == e-1 ? Size : Layout->getElementOffset(i+1))
                      - Layout->getElementOffset(i)) - FieldSize;
  SizeSoFar += FieldSize + PadSize;

  // Insert padding - this may include padding to increase the size of the
  // current field up to the ABI size (if the struct is not packed) as well
  // as padding to ensure that the next field starts at the right offset.
  AP.OutStreamer->EmitZeros(PadSize);
}
assert(SizeSoFar == Layout->getSizeInBytes() &&((SizeSoFar == Layout->getSizeInBytes() && "Layout of constant struct may be incorrect!"
) ? static_cast<void> (0) : __assert_fail ("SizeSoFar == Layout->getSizeInBytes() && \"Layout of constant struct may be incorrect!\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2475, __PRETTY_FUNCTION__))
       "Layout of constant struct may be incorrect!")((SizeSoFar == Layout->getSizeInBytes() && "Layout of constant struct may be incorrect!"
) ? static_cast<void> (0) : __assert_fail ("SizeSoFar == Layout->getSizeInBytes() && \"Layout of constant struct may be incorrect!\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2475, __PRETTY_FUNCTION__));
2476}

2478static void emitGlobalConstantFP(APFloat APF, Type *ET, AsmPrinter &AP) {
APInt API = APF.bitcastToAPInt();

// First print a comment with what we think the original floating-point value
// should have been.
if (AP.isVerbose()) {
29
←
Assuming the condition is true→
30
←
Taking true branch→
  SmallString<8> StrVal;
  APF.toString(StrVal);

  if (ET)
31
←
Assuming 'ET' is null→
32
←
Assuming pointer value is null→
33
←
Taking false branch→
    ET->print(AP.OutStreamer->GetCommentOS());
  else
    AP.OutStreamer->GetCommentOS() << "Printing <null> Type";
  AP.OutStreamer->GetCommentOS() << ' ' << StrVal << '\n';
}

// Now iterate through the APInt chunks, emitting them in endian-correct
// order, possibly with a smaller chunk at beginning/end (e.g. for x87 80-bit
// floats).
unsigned NumBytes = API.getBitWidth() / 8;
unsigned TrailingBytes = NumBytes % sizeof(uint64_t);
const uint64_t *p = API.getRawData();

// PPC's long double has odd notions of endianness compared to how LLVM
// handles it: p[0] goes first for *big* endian on PPC.
if (AP.getDataLayout().isBigEndian() && !ET->isPPC_FP128Ty()) {
34
←
Assuming the condition is true→
35
←
Called C++ object pointer is null
  int Chunk = API.getNumWords() - 1;

  if (TrailingBytes)
    AP.OutStreamer->EmitIntValue(p[Chunk--], TrailingBytes);

  for (; Chunk >= 0; --Chunk)
    AP.OutStreamer->EmitIntValue(p[Chunk], sizeof(uint64_t));
} else {
  unsigned Chunk;
  for (Chunk = 0; Chunk < NumBytes / sizeof(uint64_t); ++Chunk)
    AP.OutStreamer->EmitIntValue(p[Chunk], sizeof(uint64_t));

  if (TrailingBytes)
    AP.OutStreamer->EmitIntValue(p[Chunk], TrailingBytes);
}

// Emit the tail padding for the long double.
const DataLayout &DL = AP.getDataLayout();
AP.OutStreamer->EmitZeros(DL.getTypeAllocSize(ET) - DL.getTypeStoreSize(ET));
2523}

2525static void emitGlobalConstantFP(const ConstantFP *CFP, AsmPrinter &AP) {
emitGlobalConstantFP(CFP->getValueAPF(), CFP->getType(), AP);
27
←
Passing value via 2nd parameter 'ET'→
28
←
Calling 'emitGlobalConstantFP'→
2527}

2529static void emitGlobalConstantLargeInt(const ConstantInt *CI, AsmPrinter &AP) {
const DataLayout &DL = AP.getDataLayout();
unsigned BitWidth = CI->getBitWidth();

// Copy the value as we may massage the layout for constants whose bit width
// is not a multiple of 64-bits.
APInt Realigned(CI->getValue());
uint64_t ExtraBits = 0;
unsigned ExtraBitsSize = BitWidth & 63;

if (ExtraBitsSize) {
  // The bit width of the data is not a multiple of 64-bits.
  // The extra bits are expected to be at the end of the chunk of the memory.
  // Little endian:
  // * Nothing to be done, just record the extra bits to emit.
  // Big endian:
  // * Record the extra bits to emit.
  // * Realign the raw data to emit the chunks of 64-bits.
  if (DL.isBigEndian()) {
    // Basically the structure of the raw data is a chunk of 64-bits cells:
    //    0        1         BitWidth / 64
    // [chunk1][chunk2] ... [chunkN].
    // The most significant chunk is chunkN and it should be emitted first.
    // However, due to the alignment issue chunkN contains useless bits.
    // Realign the chunks so that they contain only useless information:
    // ExtraBits     0       1       (BitWidth / 64) - 1
    //       chu[nk1 chu][nk2 chu] ... [nkN-1 chunkN]
    ExtraBits = Realigned.getRawData()[0] &
      (((uint64_t)-1) >> (64 - ExtraBitsSize));
    Realigned.lshrInPlace(ExtraBitsSize);
  } else
    ExtraBits = Realigned.getRawData()[BitWidth / 64];
}

// We don't expect assemblers to support integer data directives
// for more than 64 bits, so we emit the data in at most 64-bit
// quantities at a time.
const uint64_t *RawData = Realigned.getRawData();
for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
  uint64_t Val = DL.isBigEndian() ? RawData[e - i - 1] : RawData[i];
  AP.OutStreamer->EmitIntValue(Val, 8);
}

if (ExtraBitsSize) {
  // Emit the extra bits after the 64-bits chunks.

  // Emit a directive that fills the expected size.
  uint64_t Size = AP.getDataLayout().getTypeAllocSize(CI->getType());
  Size -= (BitWidth / 64) * 8;
  assert(Size && Size * 8 >= ExtraBitsSize &&((Size && Size * 8 >= ExtraBitsSize && (ExtraBits
 & (((uint64_t)-1) >> (64 - ExtraBitsSize))) == ExtraBits
 && "Directive too small for extra bits.") ? static_cast
<void> (0) : __assert_fail ("Size && Size * 8 >= ExtraBitsSize && (ExtraBits & (((uint64_t)-1) >> (64 - ExtraBitsSize))) == ExtraBits && \"Directive too small for extra bits.\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2580, __PRETTY_FUNCTION__))
         (ExtraBits & (((uint64_t)-1) >> (64 - ExtraBitsSize)))((Size && Size * 8 >= ExtraBitsSize && (ExtraBits
 & (((uint64_t)-1) >> (64 - ExtraBitsSize))) == ExtraBits
 && "Directive too small for extra bits.") ? static_cast
<void> (0) : __assert_fail ("Size && Size * 8 >= ExtraBitsSize && (ExtraBits & (((uint64_t)-1) >> (64 - ExtraBitsSize))) == ExtraBits && \"Directive too small for extra bits.\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2580, __PRETTY_FUNCTION__))
         == ExtraBits && "Directive too small for extra bits.")((Size && Size * 8 >= ExtraBitsSize && (ExtraBits
 & (((uint64_t)-1) >> (64 - ExtraBitsSize))) == ExtraBits
 && "Directive too small for extra bits.") ? static_cast
<void> (0) : __assert_fail ("Size && Size * 8 >= ExtraBitsSize && (ExtraBits & (((uint64_t)-1) >> (64 - ExtraBitsSize))) == ExtraBits && \"Directive too small for extra bits.\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2580, __PRETTY_FUNCTION__));
  AP.OutStreamer->EmitIntValue(ExtraBits, Size);
}
2583}

2585/// Transform a not absolute MCExpr containing a reference to a GOT
2586/// equivalent global, by a target specific GOT pc relative access to the
2587/// final symbol.
2588static void handleIndirectSymViaGOTPCRel(AsmPrinter &AP, const MCExpr **ME,
                                       const Constant *BaseCst,
                                       uint64_t Offset) {
// The global @foo below illustrates a global that uses a got equivalent.
//
//  @bar = global i32 42
//  @gotequiv = private unnamed_addr constant i32* @bar
//  @foo = i32 trunc (i64 sub (i64 ptrtoint (i32** @gotequiv to i64),
//                             i64 ptrtoint (i32* @foo to i64))
//                        to i32)
//
// The cstexpr in @foo is converted into the MCExpr `ME`, where we actually
// check whether @foo is suitable to use a GOTPCREL. `ME` is usually in the
// form:
//
//  foo = cstexpr, where
//    cstexpr := <gotequiv> - "." + <cst>
//    cstexpr := <gotequiv> - (<foo> - <offset from @foo base>) + <cst>
//
// After canonicalization by evaluateAsRelocatable `ME` turns into:
//
//  cstexpr := <gotequiv> - <foo> + gotpcrelcst, where
//    gotpcrelcst := <offset from @foo base> + <cst>
MCValue MV;
if (!(*ME)->evaluateAsRelocatable(MV, nullptr, nullptr) || MV.isAbsolute())
  return;
const MCSymbolRefExpr *SymA = MV.getSymA();
if (!SymA)
  return;

// Check that GOT equivalent symbol is cached.
const MCSymbol *GOTEquivSym = &SymA->getSymbol();
if (!AP.GlobalGOTEquivs.count(GOTEquivSym))
  return;

const GlobalValue *BaseGV = dyn_cast_or_null<GlobalValue>(BaseCst);
if (!BaseGV)
  return;

// Check for a valid base symbol
const MCSymbol *BaseSym = AP.getSymbol(BaseGV);
const MCSymbolRefExpr *SymB = MV.getSymB();

if (!SymB || BaseSym != &SymB->getSymbol())
  return;

// Make sure to match:
//
//    gotpcrelcst := <offset from @foo base> + <cst>
//
// If gotpcrelcst is positive it means that we can safely fold the pc rel
// displacement into the GOTPCREL. We can also can have an extra offset <cst>
// if the target knows how to encode it.
int64_t GOTPCRelCst = Offset + MV.getConstant();
if (GOTPCRelCst < 0)
  return;
if (!AP.getObjFileLowering().supportGOTPCRelWithOffset() && GOTPCRelCst != 0)
  return;

// Emit the GOT PC relative to replace the got equivalent global, i.e.:
//
//  bar:
//    .long 42
//  gotequiv:
//    .quad bar
//  foo:
//    .long gotequiv - "." + <cst>
//
// is replaced by the target specific equivalent to:
//
//  bar:
//    .long 42
//  foo:
//    .long bar@GOTPCREL+<gotpcrelcst>
AsmPrinter::GOTEquivUsePair Result = AP.GlobalGOTEquivs[GOTEquivSym];
const GlobalVariable *GV = Result.first;
int NumUses = (int)Result.second;
const GlobalValue *FinalGV = dyn_cast<GlobalValue>(GV->getOperand(0));
const MCSymbol *FinalSym = AP.getSymbol(FinalGV);
*ME = AP.getObjFileLowering().getIndirectSymViaGOTPCRel(
    FinalGV, FinalSym, MV, Offset, AP.MMI, *AP.OutStreamer);

// Update GOT equivalent usage information
--NumUses;
if (NumUses >= 0)
  AP.GlobalGOTEquivs[GOTEquivSym] = std::make_pair(GV, NumUses);
2674}

2676static void emitGlobalConstantImpl(const DataLayout &DL, const Constant *CV,
                                 AsmPrinter &AP, const Constant *BaseCV,
                                 uint64_t Offset) {
uint64_t Size = DL.getTypeAllocSize(CV->getType());

// Globals with sub-elements such as combinations of arrays and structs
// are handled recursively by emitGlobalConstantImpl. Keep track of the
// constant symbol base and the current position with BaseCV and Offset.
if (!BaseCV16.1
'BaseCV' is null
 && CV->hasOneUse())
17
←
Assuming the condition is false→
18
←
Taking false branch→
  BaseCV = dyn_cast<Constant>(CV->user_back());

if (isa<ConstantAggregateZero>(CV) || isa<UndefValue>(CV))
19
←
Assuming 'CV' is not a 'ConstantAggregateZero'→
20
←
Assuming 'CV' is not a 'UndefValue'→
21
←
Taking false branch→
  return AP.OutStreamer->EmitZeros(Size);

if (const ConstantInt *CI22.1
'CI' is null
 = dyn_cast<ConstantInt>(CV)) {
22
←
Assuming 'CV' is not a 'ConstantInt'→
23
←
Taking false branch→
  switch (Size) {
  case 1:
  case 2:
  case 4:
  case 8:
    if (AP.isVerbose())
      AP.OutStreamer->GetCommentOS() << format("0x%" PRIx64"l" "x" "\n",
                                               CI->getZExtValue());
    AP.OutStreamer->EmitIntValue(CI->getZExtValue(), Size);
    return;
  default:
    emitGlobalConstantLargeInt(CI, AP);
    return;
  }
}

if (const ConstantFP *CFP24.1
'CFP' is non-null
 = dyn_cast<ConstantFP>(CV))
24
←
Assuming 'CV' is a 'ConstantFP'→
25
←
Taking true branch→
  return emitGlobalConstantFP(CFP, AP);
26
←
Calling 'emitGlobalConstantFP'→

if (isa<ConstantPointerNull>(CV)) {
  AP.OutStreamer->EmitIntValue(0, Size);
  return;
}

if (const ConstantDataSequential *CDS = dyn_cast<ConstantDataSequential>(CV))
  return emitGlobalConstantDataSequential(DL, CDS, AP);

if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV))
  return emitGlobalConstantArray(DL, CVA, AP, BaseCV, Offset);

if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV))
  return emitGlobalConstantStruct(DL, CVS, AP, BaseCV, Offset);

if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
  // Look through bitcasts, which might not be able to be MCExpr'ized (e.g. of
  // vectors).
  if (CE->getOpcode() == Instruction::BitCast)
    return emitGlobalConstantImpl(DL, CE->getOperand(0), AP);

  if (Size > 8) {
    // If the constant expression's size is greater than 64-bits, then we have
    // to emit the value in chunks. Try to constant fold the value and emit it
    // that way.
    Constant *New = ConstantFoldConstant(CE, DL);
    if (New && New != CE)
      return emitGlobalConstantImpl(DL, New, AP);
  }
}

if (const ConstantVector *V = dyn_cast<ConstantVector>(CV))
  return emitGlobalConstantVector(DL, V, AP);

// Otherwise, it must be a ConstantExpr.  Lower it to an MCExpr, then emit it
// thread the streamer with EmitValue.
const MCExpr *ME = AP.lowerConstant(CV);

// Since lowerConstant already folded and got rid of all IR pointer and
// integer casts, detect GOT equivalent accesses by looking into the MCExpr
// directly.
if (AP.getObjFileLowering().supportIndirectSymViaGOTPCRel())
  handleIndirectSymViaGOTPCRel(AP, &ME, BaseCV, Offset);

AP.OutStreamer->EmitValue(ME, Size);
2754}

2756/// EmitGlobalConstant - Print a general LLVM constant to the .s file.
2757void AsmPrinter::EmitGlobalConstant(const DataLayout &DL, const Constant *CV) {
uint64_t Size = DL.getTypeAllocSize(CV->getType());
if (Size)
14
←
Assuming 'Size' is not equal to 0→
15
←
Taking true branch→
  emitGlobalConstantImpl(DL, CV, *this);
16
←
Calling 'emitGlobalConstantImpl'→
else if (MAI->hasSubsectionsViaSymbols()) {
  // If the global has zero size, emit a single byte so that two labels don't
  // look like they are at the same location.
  OutStreamer->EmitIntValue(0, 1);
}
2766}

2768void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
// Target doesn't support this yet!
llvm_unreachable("Target does not support EmitMachineConstantPoolValue")::llvm::llvm_unreachable_internal("Target does not support EmitMachineConstantPoolValue"
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2770);
2771}

2773void AsmPrinter::printOffset(int64_t Offset, raw_ostream &OS) const {
if (Offset > 0)
  OS << '+' << Offset;
else if (Offset < 0)
  OS << Offset;
2778}

2780//===----------------------------------------------------------------------===//
2781// Symbol Lowering Routines.
2782//===----------------------------------------------------------------------===//

2784MCSymbol *AsmPrinter::createTempSymbol(const Twine &Name) const {
return OutContext.createTempSymbol(Name, true);
2786}

2788MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BlockAddress *BA) const {
return MMI->getAddrLabelSymbol(BA->getBasicBlock());
2790}

2792MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BasicBlock *BB) const {
return MMI->getAddrLabelSymbol(BB);
2794}

2796/// GetCPISymbol - Return the symbol for the specified constant pool entry.
2797MCSymbol *AsmPrinter::GetCPISymbol(unsigned CPID) const {
if (getSubtargetInfo().getTargetTriple().isWindowsMSVCEnvironment()) {
  const MachineConstantPoolEntry &CPE =
      MF->getConstantPool()->getConstants()[CPID];
  if (!CPE.isMachineConstantPoolEntry()) {
    const DataLayout &DL = MF->getDataLayout();
    SectionKind Kind = CPE.getSectionKind(&DL);
    const Constant *C = CPE.Val.ConstVal;
    unsigned Align = CPE.Alignment;
    if (const MCSectionCOFF *S = dyn_cast<MCSectionCOFF>(
            getObjFileLowering().getSectionForConstant(DL, Kind, C, Align))) {
      if (MCSymbol *Sym = S->getCOMDATSymbol()) {
        if (Sym->isUndefined())
          OutStreamer->EmitSymbolAttribute(Sym, MCSA_Global);
        return Sym;
      }
    }
  }
}

const DataLayout &DL = getDataLayout();
return OutContext.getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
                                    "CPI" + Twine(getFunctionNumber()) + "_" +
                                    Twine(CPID));
2821}

2823/// GetJTISymbol - Return the symbol for the specified jump table entry.
2824MCSymbol *AsmPrinter::GetJTISymbol(unsigned JTID, bool isLinkerPrivate) const {
return MF->getJTISymbol(JTID, OutContext, isLinkerPrivate);
2826}

2828/// GetJTSetSymbol - Return the symbol for the specified jump table .set
2829/// FIXME: privatize to AsmPrinter.
2830MCSymbol *AsmPrinter::GetJTSetSymbol(unsigned UID, unsigned MBBID) const {
const DataLayout &DL = getDataLayout();
return OutContext.getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
                                    Twine(getFunctionNumber()) + "_" +
                                    Twine(UID) + "_set_" + Twine(MBBID));
2835}

2837MCSymbol *AsmPrinter::getSymbolWithGlobalValueBase(const GlobalValue *GV,
                                                 StringRef Suffix) const {
return getObjFileLowering().getSymbolWithGlobalValueBase(GV, Suffix, TM);
2840}

2842/// Return the MCSymbol for the specified ExternalSymbol.
2843MCSymbol *AsmPrinter::GetExternalSymbolSymbol(StringRef Sym) const {
SmallString<60> NameStr;
Mangler::getNameWithPrefix(NameStr, Sym, getDataLayout());
return OutContext.getOrCreateSymbol(NameStr);
2847}

2849/// PrintParentLoopComment - Print comments about parent loops of this one.
2850static void PrintParentLoopComment(raw_ostream &OS, const MachineLoop *Loop,
                                 unsigned FunctionNumber) {
if (!Loop) return;
PrintParentLoopComment(OS, Loop->getParentLoop(), FunctionNumber);
OS.indent(Loop->getLoopDepth()*2)
  << "Parent Loop BB" << FunctionNumber << "_"
  << Loop->getHeader()->getNumber()
  << " Depth=" << Loop->getLoopDepth() << '\n';
2858}

2860/// PrintChildLoopComment - Print comments about child loops within
2861/// the loop for this basic block, with nesting.
2862static void PrintChildLoopComment(raw_ostream &OS, const MachineLoop *Loop,
                                unsigned FunctionNumber) {
// Add child loop information
for (const MachineLoop *CL : *Loop) {
  OS.indent(CL->getLoopDepth()*2)
    << "Child Loop BB" << FunctionNumber << "_"
    << CL->getHeader()->getNumber() << " Depth " << CL->getLoopDepth()
    << '\n';
  PrintChildLoopComment(OS, CL, FunctionNumber);
}
2872}

2874/// emitBasicBlockLoopComments - Pretty-print comments for basic blocks.
2875static void emitBasicBlockLoopComments(const MachineBasicBlock &MBB,
                                     const MachineLoopInfo *LI,
                                     const AsmPrinter &AP) {
// Add loop depth information
const MachineLoop *Loop = LI->getLoopFor(&MBB);
if (!Loop) return;

MachineBasicBlock *Header = Loop->getHeader();
assert(Header && "No header for loop")((Header && "No header for loop") ? static_cast<void
> (0) : __assert_fail ("Header && \"No header for loop\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2883, __PRETTY_FUNCTION__));

// If this block is not a loop header, just print out what is the loop header
// and return.
if (Header != &MBB) {
  AP.OutStreamer->AddComment("  in Loop: Header=BB" +
                             Twine(AP.getFunctionNumber())+"_" +
                             Twine(Loop->getHeader()->getNumber())+
                             " Depth="+Twine(Loop->getLoopDepth()));
  return;
}

// Otherwise, it is a loop header.  Print out information about child and
// parent loops.
raw_ostream &OS = AP.OutStreamer->GetCommentOS();

PrintParentLoopComment(OS, Loop->getParentLoop(), AP.getFunctionNumber());

OS << "=>";
OS.indent(Loop->getLoopDepth()*2-2);

OS << "This ";
if (Loop->empty())
  OS << "Inner ";
OS << "Loop Header: Depth=" + Twine(Loop->getLoopDepth()) << '\n';

PrintChildLoopComment(OS, Loop, AP.getFunctionNumber());
2910}

2912void AsmPrinter::setupCodePaddingContext(const MachineBasicBlock &MBB,
                                       MCCodePaddingContext &Context) const {
assert(MF != nullptr && "Machine function must be valid")((MF != nullptr && "Machine function must be valid") ?
 static_cast<void> (0) : __assert_fail ("MF != nullptr && \"Machine function must be valid\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2914, __PRETTY_FUNCTION__));
Context.IsPaddingActive = !MF->hasInlineAsm() &&
                          !MF->getFunction().hasOptSize() &&
                          TM.getOptLevel() != CodeGenOpt::None;
Context.IsBasicBlockReachableViaFallthrough =
    std::find(MBB.pred_begin(), MBB.pred_end(), MBB.getPrevNode()) !=
    MBB.pred_end();
Context.IsBasicBlockReachableViaBranch =
    MBB.pred_size() > 0 && !isBlockOnlyReachableByFallthrough(&MBB);
2923}

2925/// EmitBasicBlockStart - This method prints the label for the specified
2926/// MachineBasicBlock, an alignment (if present) and a comment describing
2927/// it if appropriate.
2928void AsmPrinter::EmitBasicBlockStart(const MachineBasicBlock &MBB) {
// End the previous funclet and start a new one.
if (MBB.isEHFuncletEntry()) {
  for (const HandlerInfo &HI : Handlers) {
    HI.Handler->endFunclet();
    HI.Handler->beginFunclet(MBB);
  }
}

// Emit an alignment directive for this block, if needed.
const Align Alignment = MBB.getAlignment();
if (Alignment != Align::None())
  EmitAlignment(Alignment);
MCCodePaddingContext Context;
setupCodePaddingContext(MBB, Context);
OutStreamer->EmitCodePaddingBasicBlockStart(Context);

// If the block has its address taken, emit any labels that were used to
// reference the block.  It is possible that there is more than one label
// here, because multiple LLVM BB's may have been RAUW'd to this block after
// the references were generated.
if (MBB.hasAddressTaken()) {
  const BasicBlock *BB = MBB.getBasicBlock();
  if (isVerbose())
    OutStreamer->AddComment("Block address taken");

  // MBBs can have their address taken as part of CodeGen without having
  // their corresponding BB's address taken in IR
  if (BB->hasAddressTaken())
    for (MCSymbol *Sym : MMI->getAddrLabelSymbolToEmit(BB))
      OutStreamer->EmitLabel(Sym);
}

// Print some verbose block comments.
if (isVerbose()) {
  if (const BasicBlock *BB = MBB.getBasicBlock()) {
    if (BB->hasName()) {
      BB->printAsOperand(OutStreamer->GetCommentOS(),
                         /*PrintType=*/false, BB->getModule());
      OutStreamer->GetCommentOS() << '\n';
    }
  }

  assert(MLI != nullptr && "MachineLoopInfo should has been computed")((MLI != nullptr && "MachineLoopInfo should has been computed"
) ? static_cast<void> (0) : __assert_fail ("MLI != nullptr && \"MachineLoopInfo should has been computed\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 2971, __PRETTY_FUNCTION__));
  emitBasicBlockLoopComments(MBB, MLI, *this);
}

// Print the main label for the block.
if (MBB.pred_empty() ||
    (isBlockOnlyReachableByFallthrough(&MBB) && !MBB.isEHFuncletEntry() &&
     !MBB.hasLabelMustBeEmitted())) {
  if (isVerbose()) {
    // NOTE: Want this comment at start of line, don't emit with AddComment.
    OutStreamer->emitRawComment(" %bb." + Twine(MBB.getNumber()) + ":",
                                false);
  }
} else {
  if (isVerbose() && MBB.hasLabelMustBeEmitted())
    OutStreamer->AddComment("Label of block must be emitted");
  OutStreamer->EmitLabel(MBB.getSymbol());
}
2989}

2991void AsmPrinter::EmitBasicBlockEnd(const MachineBasicBlock &MBB) {
MCCodePaddingContext Context;
setupCodePaddingContext(MBB, Context);
OutStreamer->EmitCodePaddingBasicBlockEnd(Context);
2995}

2997void AsmPrinter::EmitVisibility(MCSymbol *Sym, unsigned Visibility,
                              bool IsDefinition) const {
MCSymbolAttr Attr = MCSA_Invalid;

switch (Visibility) {
default: break;
case GlobalValue::HiddenVisibility:
  if (IsDefinition)
    Attr = MAI->getHiddenVisibilityAttr();
  else
    Attr = MAI->getHiddenDeclarationVisibilityAttr();
  break;
case GlobalValue::ProtectedVisibility:
  Attr = MAI->getProtectedVisibilityAttr();
  break;
}

if (Attr != MCSA_Invalid)
  OutStreamer->EmitSymbolAttribute(Sym, Attr);
3016}

3018/// isBlockOnlyReachableByFallthough - Return true if the basic block has
3019/// exactly one predecessor and the control transfer mechanism between
3020/// the predecessor and this block is a fall-through.
3021bool AsmPrinter::
3022isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const {
// If this is a landing pad, it isn't a fall through.  If it has no preds,
// then nothing falls through to it.
if (MBB->isEHPad() || MBB->pred_empty())
  return false;

// If there isn't exactly one predecessor, it can't be a fall through.
if (MBB->pred_size() > 1)
  return false;

// The predecessor has to be immediately before this block.
MachineBasicBlock *Pred = *MBB->pred_begin();
if (!Pred->isLayoutSuccessor(MBB))
  return false;

// If the block is completely empty, then it definitely does fall through.
if (Pred->empty())
  return true;

// Check the terminators in the previous blocks
for (const auto &MI : Pred->terminators()) {
  // If it is not a simple branch, we are in a table somewhere.
  if (!MI.isBranch() || MI.isIndirectBranch())
    return false;

  // If we are the operands of one of the branches, this is not a fall
  // through. Note that targets with delay slots will usually bundle
  // terminators with the delay slot instruction.
  for (ConstMIBundleOperands OP(MI); OP.isValid(); ++OP) {
    if (OP->isJTI())
      return false;
    if (OP->isMBB() && OP->getMBB() == MBB)
      return false;
  }
}

return true;
3059}

3061GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy &S) {
if (!S.usesMetadata())
  return nullptr;

gcp_map_type &GCMap = getGCMap(GCMetadataPrinters);
gcp_map_type::iterator GCPI = GCMap.find(&S);
if (GCPI != GCMap.end())
  return GCPI->second.get();

auto Name = S.getName();

for (GCMetadataPrinterRegistry::iterator
       I = GCMetadataPrinterRegistry::begin(),
       E = GCMetadataPrinterRegistry::end(); I != E; ++I)
  if (Name == I->getName()) {
    std::unique_ptr<GCMetadataPrinter> GMP = I->instantiate();
    GMP->S = &S;
    auto IterBool = GCMap.insert(std::make_pair(&S, std::move(GMP)));
    return IterBool.first->second.get();
  }

report_fatal_error("no GCMetadataPrinter registered for GC: " + Twine(Name));
3083}

3085void AsmPrinter::emitStackMaps(StackMaps &SM) {
GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
assert(MI && "AsmPrinter didn't require GCModuleInfo?")((MI && "AsmPrinter didn't require GCModuleInfo?") ? static_cast
<void> (0) : __assert_fail ("MI && \"AsmPrinter didn't require GCModuleInfo?\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 3087, __PRETTY_FUNCTION__));
bool NeedsDefault = false;
if (MI->begin() == MI->end())
  // No GC strategy, use the default format.
  NeedsDefault = true;
else
  for (auto &I : *MI) {
    if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
      if (MP->emitStackMaps(SM, *this))
        continue;
    // The strategy doesn't have printer or doesn't emit custom stack maps.
    // Use the default format.
    NeedsDefault = true;
  }

if (NeedsDefault)
  SM.serializeToStackMapSection();
3104}

3106/// Pin vtable to this file.
3107AsmPrinterHandler::~AsmPrinterHandler() = default;

3109void AsmPrinterHandler::markFunctionEnd() {}

3111// In the binary's "xray_instr_map" section, an array of these function entries
3112// describes each instrumentation point.  When XRay patches your code, the index
3113// into this table will be given to your handler as a patch point identifier.
3114void AsmPrinter::XRayFunctionEntry::emit(int Bytes, MCStreamer *Out,
                                       const MCSymbol *CurrentFnSym) const {
Out->EmitSymbolValue(Sled, Bytes);
Out->EmitSymbolValue(CurrentFnSym, Bytes);
auto Kind8 = static_cast<uint8_t>(Kind);
Out->EmitBinaryData(StringRef(reinterpret_cast<const char *>(&Kind8), 1));
Out->EmitBinaryData(
    StringRef(reinterpret_cast<const char *>(&AlwaysInstrument), 1));
Out->EmitBinaryData(StringRef(reinterpret_cast<const char *>(&Version), 1));
auto Padding = (4 * Bytes) - ((2 * Bytes) + 3);
assert(Padding >= 0 && "Instrumentation map entry > 4 * Word Size")((Padding >= 0 && "Instrumentation map entry > 4 * Word Size"
) ? static_cast<void> (0) : __assert_fail ("Padding >= 0 && \"Instrumentation map entry > 4 * Word Size\""
, "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 3124, __PRETTY_FUNCTION__));
Out->EmitZeros(Padding);
3126}

3128void AsmPrinter::emitXRayTable() {
if (Sleds.empty())
  return;

auto PrevSection = OutStreamer->getCurrentSectionOnly();
const Function &F = MF->getFunction();
MCSection *InstMap = nullptr;
MCSection *FnSledIndex = nullptr;
if (MF->getSubtarget().getTargetTriple().isOSBinFormatELF()) {
  auto Associated = dyn_cast<MCSymbolELF>(CurrentFnSym);
  assert(Associated != nullptr)((Associated != nullptr) ? static_cast<void> (0) : __assert_fail
 ("Associated != nullptr", "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 3138, __PRETTY_FUNCTION__));
  auto Flags = ELF::SHF_WRITE | ELF::SHF_ALLOC | ELF::SHF_LINK_ORDER;
  std::string GroupName;
  if (F.hasComdat()) {
    Flags |= ELF::SHF_GROUP;
    GroupName = F.getComdat()->getName();
  }

  auto UniqueID = ++XRayFnUniqueID;
  InstMap =
      OutContext.getELFSection("xray_instr_map", ELF::SHT_PROGBITS, Flags, 0,
                               GroupName, UniqueID, Associated);
  FnSledIndex =
      OutContext.getELFSection("xray_fn_idx", ELF::SHT_PROGBITS, Flags, 0,
                               GroupName, UniqueID, Associated);
} else if (MF->getSubtarget().getTargetTriple().isOSBinFormatMachO()) {
  InstMap = OutContext.getMachOSection("__DATA", "xray_instr_map", 0,
                                       SectionKind::getReadOnlyWithRel());
  FnSledIndex = OutContext.getMachOSection("__DATA", "xray_fn_idx", 0,
                                           SectionKind::getReadOnlyWithRel());
} else {
  llvm_unreachable("Unsupported target")::llvm::llvm_unreachable_internal("Unsupported target", "/build/llvm-toolchain-snapshot-10~svn373386/lib/CodeGen/AsmPrinter/AsmPrinter.cpp"
, 3159);
}

auto WordSizeBytes = MAI->getCodePointerSize();

// Now we switch to the instrumentation map section. Because this is done
// per-function, we are able to create an index entry that will represent the
// range of sleds associated with a function.
MCSymbol *SledsStart = OutContext.createTempSymbol("xray_sleds_start", true);
OutStreamer->SwitchSection(InstMap);
OutStreamer->EmitLabel(SledsStart);
for (const auto &Sled : Sleds)
  Sled.emit(WordSizeBytes, OutStreamer.get(), CurrentFnSym);
MCSymbol *SledsEnd = OutContext.createTempSymbol("xray_sleds_end", true);
OutStreamer->EmitLabel(SledsEnd);

// We then emit a single entry in the index per function. We use the symbols
// that bound the instrumentation map as the range for a specific function.
// Each entry here will be 2 * word size aligned, as we're writing down two
// pointers. This should work for both 32-bit and 64-bit platforms.
OutStreamer->SwitchSection(FnSledIndex);
OutStreamer->EmitCodeAlignment(2 * WordSizeBytes);
OutStreamer->EmitSymbolValue(SledsStart, WordSizeBytes, false);
OutStreamer->EmitSymbolValue(SledsEnd, WordSizeBytes, false);
OutStreamer->SwitchSection(PrevSection);
Sleds.clear();
3185}

3187void AsmPrinter::recordSled(MCSymbol *Sled, const MachineInstr &MI,
                          SledKind Kind, uint8_t Version) {
const Function &F = MI.getMF()->getFunction();
auto Attr = F.getFnAttribute("function-instrument");
bool LogArgs = F.hasFnAttribute("xray-log-args");
bool AlwaysInstrument =
  Attr.isStringAttribute() && Attr.getValueAsString() == "xray-always";
if (Kind == SledKind::FUNCTION_ENTER && LogArgs)
  Kind = SledKind::LOG_ARGS_ENTER;
Sleds.emplace_back(XRayFunctionEntry{Sled, CurrentFnSym, Kind,
                                     AlwaysInstrument, &F, Version});
3198}

3200uint16_t AsmPrinter::getDwarfVersion() const {
return OutStreamer->getContext().getDwarfVersion();
3202}

3204void AsmPrinter::setDwarfVersion(uint16_t Version) {
OutStreamer->getContext().setDwarfVersion(Version);
3206}