/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp

Bug Summary

File:	lib/AsmParser/LLParser.cpp
Warning:	line 1972, column 17 The right operand of '==' is a garbage value
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 LLParser.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-eagerly-assume -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 -mrelocation-model pic -pic-level 2 -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-7/lib/clang/7.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-7~svn326246/build-llvm/lib/AsmParser -I /build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser -I /build/llvm-toolchain-snapshot-7~svn326246/build-llvm/include -I /build/llvm-toolchain-snapshot-7~svn326246/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/x86_64-linux-gnu/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/x86_64-linux-gnu/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0/backward -internal-isystem /usr/include/clang/7.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-7/lib/clang/7.0.0/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++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-7~svn326246/build-llvm/lib/AsmParser -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-checker optin.performance.Padding -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-02-28-041547-14988-1 -x c++ /build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp
/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp

→
1//===-- LLParser.cpp - Parser Class ---------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10//  This file defines the parser class for .ll files.
11//
12//===----------------------------------------------------------------------===//

14#include "LLParser.h"
15#include "llvm/ADT/DenseMap.h"
16#include "llvm/ADT/None.h"
17#include "llvm/ADT/Optional.h"
18#include "llvm/ADT/STLExtras.h"
19#include "llvm/ADT/SmallPtrSet.h"
20#include "llvm/AsmParser/SlotMapping.h"
21#include "llvm/BinaryFormat/Dwarf.h"
22#include "llvm/IR/Argument.h"
23#include "llvm/IR/AutoUpgrade.h"
24#include "llvm/IR/BasicBlock.h"
25#include "llvm/IR/CallingConv.h"
26#include "llvm/IR/Comdat.h"
27#include "llvm/IR/Constants.h"
28#include "llvm/IR/DebugInfoMetadata.h"
29#include "llvm/IR/DerivedTypes.h"
30#include "llvm/IR/Function.h"
31#include "llvm/IR/GlobalIFunc.h"
32#include "llvm/IR/GlobalObject.h"
33#include "llvm/IR/InlineAsm.h"
34#include "llvm/IR/Instruction.h"
35#include "llvm/IR/Instructions.h"
36#include "llvm/IR/Intrinsics.h"
37#include "llvm/IR/LLVMContext.h"
38#include "llvm/IR/Metadata.h"
39#include "llvm/IR/Module.h"
40#include "llvm/IR/Operator.h"
41#include "llvm/IR/Type.h"
42#include "llvm/IR/Value.h"
43#include "llvm/IR/ValueSymbolTable.h"
44#include "llvm/Support/Casting.h"
45#include "llvm/Support/ErrorHandling.h"
46#include "llvm/Support/MathExtras.h"
47#include "llvm/Support/SaveAndRestore.h"
48#include "llvm/Support/raw_ostream.h"
49#include <algorithm>
50#include <cassert>
51#include <cstring>
52#include <iterator>
53#include <vector>

55using namespace llvm;

57static std::string getTypeString(Type *T) {
std::string Result;
raw_string_ostream Tmp(Result);
Tmp << *T;
return Tmp.str();
62}

64/// Run: module ::= toplevelentity*
65bool LLParser::Run() {
// Prime the lexer.
Lex.Lex();

if (Context.shouldDiscardValueNames())
  return Error(
      Lex.getLoc(),
      "Can't read textual IR with a Context that discards named Values");

return ParseTopLevelEntities() ||
       ValidateEndOfModule();
76}

78bool LLParser::parseStandaloneConstantValue(Constant *&C,
                                          const SlotMapping *Slots) {
restoreParsingState(Slots);
Lex.Lex();

Type *Ty = nullptr;
if (ParseType(Ty) || parseConstantValue(Ty, C))
  return true;
if (Lex.getKind() != lltok::Eof)
  return Error(Lex.getLoc(), "expected end of string");
return false;
89}

91bool LLParser::parseTypeAtBeginning(Type *&Ty, unsigned &Read,
                                  const SlotMapping *Slots) {
restoreParsingState(Slots);
Lex.Lex();

Read = 0;
SMLoc Start = Lex.getLoc();
Ty = nullptr;
if (ParseType(Ty))
  return true;
SMLoc End = Lex.getLoc();
Read = End.getPointer() - Start.getPointer();

return false;
105}

107void LLParser::restoreParsingState(const SlotMapping *Slots) {
if (!Slots)
  return;
NumberedVals = Slots->GlobalValues;
NumberedMetadata = Slots->MetadataNodes;
for (const auto &I : Slots->NamedTypes)
  NamedTypes.insert(
      std::make_pair(I.getKey(), std::make_pair(I.second, LocTy())));
for (const auto &I : Slots->Types)
  NumberedTypes.insert(
      std::make_pair(I.first, std::make_pair(I.second, LocTy())));
118}

120/// ValidateEndOfModule - Do final validity and sanity checks at the end of the
121/// module.
122bool LLParser::ValidateEndOfModule() {
// Handle any function attribute group forward references.
for (const auto &RAG : ForwardRefAttrGroups) {
  Value *V = RAG.first;
  const std::vector<unsigned> &Attrs = RAG.second;
  AttrBuilder B;

  for (const auto &Attr : Attrs)
    B.merge(NumberedAttrBuilders[Attr]);

  if (Function *Fn = dyn_cast<Function>(V)) {
    AttributeList AS = Fn->getAttributes();
    AttrBuilder FnAttrs(AS.getFnAttributes());
    AS = AS.removeAttributes(Context, AttributeList::FunctionIndex);

    FnAttrs.merge(B);

    // If the alignment was parsed as an attribute, move to the alignment
    // field.
    if (FnAttrs.hasAlignmentAttr()) {
      Fn->setAlignment(FnAttrs.getAlignment());
      FnAttrs.removeAttribute(Attribute::Alignment);
    }

    AS = AS.addAttributes(Context, AttributeList::FunctionIndex,
                          AttributeSet::get(Context, FnAttrs));
    Fn->setAttributes(AS);
  } else if (CallInst *CI = dyn_cast<CallInst>(V)) {
    AttributeList AS = CI->getAttributes();
    AttrBuilder FnAttrs(AS.getFnAttributes());
    AS = AS.removeAttributes(Context, AttributeList::FunctionIndex);
    FnAttrs.merge(B);
    AS = AS.addAttributes(Context, AttributeList::FunctionIndex,
                          AttributeSet::get(Context, FnAttrs));
    CI->setAttributes(AS);
  } else if (InvokeInst *II = dyn_cast<InvokeInst>(V)) {
    AttributeList AS = II->getAttributes();
    AttrBuilder FnAttrs(AS.getFnAttributes());
    AS = AS.removeAttributes(Context, AttributeList::FunctionIndex);
    FnAttrs.merge(B);
    AS = AS.addAttributes(Context, AttributeList::FunctionIndex,
                          AttributeSet::get(Context, FnAttrs));
    II->setAttributes(AS);
  } else if (auto *GV = dyn_cast<GlobalVariable>(V)) {
    AttrBuilder Attrs(GV->getAttributes());
    Attrs.merge(B);
    GV->setAttributes(AttributeSet::get(Context,Attrs));
  } else {
    llvm_unreachable("invalid object with forward attribute group reference")::llvm::llvm_unreachable_internal("invalid object with forward attribute group reference"
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 170);
  }
}

// If there are entries in ForwardRefBlockAddresses at this point, the
// function was never defined.
if (!ForwardRefBlockAddresses.empty())
  return Error(ForwardRefBlockAddresses.begin()->first.Loc,
               "expected function name in blockaddress");

for (const auto &NT : NumberedTypes)
  if (NT.second.second.isValid())
    return Error(NT.second.second,
                 "use of undefined type '%" + Twine(NT.first) + "'");

for (StringMap<std::pair<Type*, LocTy> >::iterator I =
     NamedTypes.begin(), E = NamedTypes.end(); I != E; ++I)
  if (I->second.second.isValid())
    return Error(I->second.second,
                 "use of undefined type named '" + I->getKey() + "'");

if (!ForwardRefComdats.empty())
  return Error(ForwardRefComdats.begin()->second,
               "use of undefined comdat '$" +
                   ForwardRefComdats.begin()->first + "'");

if (!ForwardRefVals.empty())
  return Error(ForwardRefVals.begin()->second.second,
               "use of undefined value '@" + ForwardRefVals.begin()->first +
               "'");

if (!ForwardRefValIDs.empty())
  return Error(ForwardRefValIDs.begin()->second.second,
               "use of undefined value '@" +
               Twine(ForwardRefValIDs.begin()->first) + "'");

if (!ForwardRefMDNodes.empty())
  return Error(ForwardRefMDNodes.begin()->second.second,
               "use of undefined metadata '!" +
               Twine(ForwardRefMDNodes.begin()->first) + "'");

// Resolve metadata cycles.
for (auto &N : NumberedMetadata) {
  if (N.second && !N.second->isResolved())
    N.second->resolveCycles();
}

for (auto *Inst : InstsWithTBAATag) {
  MDNode *MD = Inst->getMetadata(LLVMContext::MD_tbaa);
  assert(MD && "UpgradeInstWithTBAATag should have a TBAA tag")(static_cast <bool> (MD && "UpgradeInstWithTBAATag should have a TBAA tag"
) ? void (0) : __assert_fail ("MD && \"UpgradeInstWithTBAATag should have a TBAA tag\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 219, __extension__ __PRETTY_FUNCTION__));
  auto *UpgradedMD = UpgradeTBAANode(*MD);
  if (MD != UpgradedMD)
    Inst->setMetadata(LLVMContext::MD_tbaa, UpgradedMD);
}

// Look for intrinsic functions and CallInst that need to be upgraded
for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; )
  UpgradeCallsToIntrinsic(&*FI++); // must be post-increment, as we remove

// Some types could be renamed during loading if several modules are
// loaded in the same LLVMContext (LTO scenario). In this case we should
// remangle intrinsics names as well.
for (Module::iterator FI = M->begin(), FE = M->end(); FI != FE; ) {
  Function *F = &*FI++;
  if (auto Remangled = Intrinsic::remangleIntrinsicFunction(F)) {
    F->replaceAllUsesWith(Remangled.getValue());
    F->eraseFromParent();
  }
}

if (UpgradeDebugInfo)
  llvm::UpgradeDebugInfo(*M);

UpgradeModuleFlags(*M);
UpgradeSectionAttributes(*M);

if (!Slots)
  return false;
// Initialize the slot mapping.
// Because by this point we've parsed and validated everything, we can "steal"
// the mapping from LLParser as it doesn't need it anymore.
Slots->GlobalValues = std::move(NumberedVals);
Slots->MetadataNodes = std::move(NumberedMetadata);
for (const auto &I : NamedTypes)
  Slots->NamedTypes.insert(std::make_pair(I.getKey(), I.second.first));
for (const auto &I : NumberedTypes)
  Slots->Types.insert(std::make_pair(I.first, I.second.first));

return false;
259}

261//===----------------------------------------------------------------------===//
262// Top-Level Entities
263//===----------------------------------------------------------------------===//

265bool LLParser::ParseTopLevelEntities() {
while (true) {
  switch (Lex.getKind()) {
  default:         return TokError("expected top-level entity");
  case lltok::Eof: return false;
  case lltok::kw_declare: if (ParseDeclare()) return true; break;
  case lltok::kw_define:  if (ParseDefine()) return true; break;
  case lltok::kw_module:  if (ParseModuleAsm()) return true; break;
  case lltok::kw_target:  if (ParseTargetDefinition()) return true; break;
  case lltok::kw_source_filename:
    if (ParseSourceFileName())
      return true;
    break;
  case lltok::kw_deplibs: if (ParseDepLibs()) return true; break;
  case lltok::LocalVarID: if (ParseUnnamedType()) return true; break;
  case lltok::LocalVar:   if (ParseNamedType()) return true; break;
  case lltok::GlobalID:   if (ParseUnnamedGlobal()) return true; break;
  case lltok::GlobalVar:  if (ParseNamedGlobal()) return true; break;
  case lltok::ComdatVar:  if (parseComdat()) return true; break;
  case lltok::exclaim:    if (ParseStandaloneMetadata()) return true; break;
  case lltok::MetadataVar:if (ParseNamedMetadata()) return true; break;
  case lltok::kw_attributes: if (ParseUnnamedAttrGrp()) return true; break;
  case lltok::kw_uselistorder: if (ParseUseListOrder()) return true; break;
  case lltok::kw_uselistorder_bb:
    if (ParseUseListOrderBB())
      return true;
    break;
  }
}
294}

296/// toplevelentity
297///   ::= 'module' 'asm' STRINGCONSTANT
298bool LLParser::ParseModuleAsm() {
assert(Lex.getKind() == lltok::kw_module)(static_cast <bool> (Lex.getKind() == lltok::kw_module)
 ? void (0) : __assert_fail ("Lex.getKind() == lltok::kw_module"
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 299, __extension__ __PRETTY_FUNCTION__));
Lex.Lex();

std::string AsmStr;
if (ParseToken(lltok::kw_asm, "expected 'module asm'") ||
    ParseStringConstant(AsmStr)) return true;

M->appendModuleInlineAsm(AsmStr);
return false;
308}

310/// toplevelentity
311///   ::= 'target' 'triple' '=' STRINGCONSTANT
312///   ::= 'target' 'datalayout' '=' STRINGCONSTANT
313bool LLParser::ParseTargetDefinition() {
assert(Lex.getKind() == lltok::kw_target)(static_cast <bool> (Lex.getKind() == lltok::kw_target)
 ? void (0) : __assert_fail ("Lex.getKind() == lltok::kw_target"
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 314, __extension__ __PRETTY_FUNCTION__));
std::string Str;
switch (Lex.Lex()) {
default: return TokError("unknown target property");
case lltok::kw_triple:
  Lex.Lex();
  if (ParseToken(lltok::equal, "expected '=' after target triple") ||
      ParseStringConstant(Str))
    return true;
  M->setTargetTriple(Str);
  return false;
case lltok::kw_datalayout:
  Lex.Lex();
  if (ParseToken(lltok::equal, "expected '=' after target datalayout") ||
      ParseStringConstant(Str))
    return true;
  if (DataLayoutStr.empty())
    M->setDataLayout(Str);
  return false;
}
334}

336/// toplevelentity
337///   ::= 'source_filename' '=' STRINGCONSTANT
338bool LLParser::ParseSourceFileName() {
assert(Lex.getKind() == lltok::kw_source_filename)(static_cast <bool> (Lex.getKind() == lltok::kw_source_filename
) ? void (0) : __assert_fail ("Lex.getKind() == lltok::kw_source_filename"
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 339, __extension__ __PRETTY_FUNCTION__));
std::string Str;
Lex.Lex();
if (ParseToken(lltok::equal, "expected '=' after source_filename") ||
    ParseStringConstant(Str))
  return true;
M->setSourceFileName(Str);
return false;
347}

349/// toplevelentity
350///   ::= 'deplibs' '=' '[' ']'
351///   ::= 'deplibs' '=' '[' STRINGCONSTANT (',' STRINGCONSTANT)* ']'
352/// FIXME: Remove in 4.0. Currently parse, but ignore.
353bool LLParser::ParseDepLibs() {
assert(Lex.getKind() == lltok::kw_deplibs)(static_cast <bool> (Lex.getKind() == lltok::kw_deplibs
) ? void (0) : __assert_fail ("Lex.getKind() == lltok::kw_deplibs"
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 354, __extension__ __PRETTY_FUNCTION__));
Lex.Lex();
if (ParseToken(lltok::equal, "expected '=' after deplibs") ||
    ParseToken(lltok::lsquare, "expected '=' after deplibs"))
  return true;

if (EatIfPresent(lltok::rsquare))
  return false;

do {
  std::string Str;
  if (ParseStringConstant(Str)) return true;
} while (EatIfPresent(lltok::comma));

return ParseToken(lltok::rsquare, "expected ']' at end of list");
369}

371/// ParseUnnamedType:
372///   ::= LocalVarID '=' 'type' type
373bool LLParser::ParseUnnamedType() {
LocTy TypeLoc = Lex.getLoc();
unsigned TypeID = Lex.getUIntVal();
Lex.Lex(); // eat LocalVarID;

if (ParseToken(lltok::equal, "expected '=' after name") ||
    ParseToken(lltok::kw_type, "expected 'type' after '='"))
  return true;

Type *Result = nullptr;
if (ParseStructDefinition(TypeLoc, "",
                          NumberedTypes[TypeID], Result)) return true;

if (!isa<StructType>(Result)) {
  std::pair<Type*, LocTy> &Entry = NumberedTypes[TypeID];
  if (Entry.first)
    return Error(TypeLoc, "non-struct types may not be recursive");
  Entry.first = Result;
  Entry.second = SMLoc();
}

return false;
395}

397/// toplevelentity
398///   ::= LocalVar '=' 'type' type
399bool LLParser::ParseNamedType() {
std::string Name = Lex.getStrVal();
LocTy NameLoc = Lex.getLoc();
Lex.Lex();  // eat LocalVar.

if (ParseToken(lltok::equal, "expected '=' after name") ||
    ParseToken(lltok::kw_type, "expected 'type' after name"))
  return true;

Type *Result = nullptr;
if (ParseStructDefinition(NameLoc, Name,
                          NamedTypes[Name], Result)) return true;

if (!isa<StructType>(Result)) {
  std::pair<Type*, LocTy> &Entry = NamedTypes[Name];
  if (Entry.first)
    return Error(NameLoc, "non-struct types may not be recursive");
  Entry.first = Result;
  Entry.second = SMLoc();
}

return false;
421}

423/// toplevelentity
424///   ::= 'declare' FunctionHeader
425bool LLParser::ParseDeclare() {
assert(Lex.getKind() == lltok::kw_declare)(static_cast <bool> (Lex.getKind() == lltok::kw_declare
) ? void (0) : __assert_fail ("Lex.getKind() == lltok::kw_declare"
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 426, __extension__ __PRETTY_FUNCTION__));
Lex.Lex();

std::vector<std::pair<unsigned, MDNode *>> MDs;
while (Lex.getKind() == lltok::MetadataVar) {
  unsigned MDK;
  MDNode *N;
  if (ParseMetadataAttachment(MDK, N))
    return true;
  MDs.push_back({MDK, N});
}

Function *F;
if (ParseFunctionHeader(F, false))
  return true;
for (auto &MD : MDs)
  F->addMetadata(MD.first, *MD.second);
return false;
444}

446/// toplevelentity
447///   ::= 'define' FunctionHeader (!dbg !56)* '{' ...
448bool LLParser::ParseDefine() {
assert(Lex.getKind() == lltok::kw_define)(static_cast <bool> (Lex.getKind() == lltok::kw_define)
 ? void (0) : __assert_fail ("Lex.getKind() == lltok::kw_define"
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 449, __extension__ __PRETTY_FUNCTION__));
Lex.Lex();

Function *F;
return ParseFunctionHeader(F, true) ||
       ParseOptionalFunctionMetadata(*F) ||
       ParseFunctionBody(*F);
456}

458/// ParseGlobalType
459///   ::= 'constant'
460///   ::= 'global'
461bool LLParser::ParseGlobalType(bool &IsConstant) {
if (Lex.getKind() == lltok::kw_constant)
  IsConstant = true;
else if (Lex.getKind() == lltok::kw_global)
  IsConstant = false;
else {
  IsConstant = false;
  return TokError("expected 'global' or 'constant'");
}
Lex.Lex();
return false;
472}

474bool LLParser::ParseOptionalUnnamedAddr(
  GlobalVariable::UnnamedAddr &UnnamedAddr) {
if (EatIfPresent(lltok::kw_unnamed_addr))
  UnnamedAddr = GlobalValue::UnnamedAddr::Global;
else if (EatIfPresent(lltok::kw_local_unnamed_addr))
  UnnamedAddr = GlobalValue::UnnamedAddr::Local;
else
  UnnamedAddr = GlobalValue::UnnamedAddr::None;
return false;
483}

485/// ParseUnnamedGlobal:
486///   OptionalVisibility (ALIAS | IFUNC) ...
487///   OptionalLinkage OptionalPreemptionSpecifier OptionalVisibility
488///   OptionalDLLStorageClass
489///                                                     ...   -> global variable
490///   GlobalID '=' OptionalVisibility (ALIAS | IFUNC) ...
491///   GlobalID '=' OptionalLinkage OptionalPreemptionSpecifier OptionalVisibility
492///                OptionalDLLStorageClass
493///                                                     ...   -> global variable
494bool LLParser::ParseUnnamedGlobal() {
unsigned VarID = NumberedVals.size();
std::string Name;
LocTy NameLoc = Lex.getLoc();

// Handle the GlobalID form.
if (Lex.getKind() == lltok::GlobalID) {
  if (Lex.getUIntVal() != VarID)
    return Error(Lex.getLoc(), "variable expected to be numbered '%" +
                 Twine(VarID) + "'");
  Lex.Lex(); // eat GlobalID;

  if (ParseToken(lltok::equal, "expected '=' after name"))
    return true;
}

bool HasLinkage;
unsigned Linkage, Visibility, DLLStorageClass;
bool DSOLocal;
GlobalVariable::ThreadLocalMode TLM;
GlobalVariable::UnnamedAddr UnnamedAddr;
if (ParseOptionalLinkage(Linkage, HasLinkage, Visibility, DLLStorageClass,
                         DSOLocal) ||
    ParseOptionalThreadLocal(TLM) || ParseOptionalUnnamedAddr(UnnamedAddr))
  return true;

if (Lex.getKind() != lltok::kw_alias && Lex.getKind() != lltok::kw_ifunc)
  return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility,
                     DLLStorageClass, DSOLocal, TLM, UnnamedAddr);

return parseIndirectSymbol(Name, NameLoc, Linkage, Visibility,
                           DLLStorageClass, DSOLocal, TLM, UnnamedAddr);
526}

528/// ParseNamedGlobal:
529///   GlobalVar '=' OptionalVisibility (ALIAS | IFUNC) ...
530///   GlobalVar '=' OptionalLinkage OptionalPreemptionSpecifier
531///                 OptionalVisibility OptionalDLLStorageClass
532///                                                     ...   -> global variable
533bool LLParser::ParseNamedGlobal() {
assert(Lex.getKind() == lltok::GlobalVar)(static_cast <bool> (Lex.getKind() == lltok::GlobalVar)
 ? void (0) : __assert_fail ("Lex.getKind() == lltok::GlobalVar"
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 534, __extension__ __PRETTY_FUNCTION__));
LocTy NameLoc = Lex.getLoc();
std::string Name = Lex.getStrVal();
Lex.Lex();

bool HasLinkage;
unsigned Linkage, Visibility, DLLStorageClass;
bool DSOLocal;
GlobalVariable::ThreadLocalMode TLM;
GlobalVariable::UnnamedAddr UnnamedAddr;
if (ParseToken(lltok::equal, "expected '=' in global variable") ||
    ParseOptionalLinkage(Linkage, HasLinkage, Visibility, DLLStorageClass,
                         DSOLocal) ||
    ParseOptionalThreadLocal(TLM) || ParseOptionalUnnamedAddr(UnnamedAddr))
  return true;

if (Lex.getKind() != lltok::kw_alias && Lex.getKind() != lltok::kw_ifunc)
  return ParseGlobal(Name, NameLoc, Linkage, HasLinkage, Visibility,
                     DLLStorageClass, DSOLocal, TLM, UnnamedAddr);

return parseIndirectSymbol(Name, NameLoc, Linkage, Visibility,
                           DLLStorageClass, DSOLocal, TLM, UnnamedAddr);
556}

558bool LLParser::parseComdat() {
assert(Lex.getKind() == lltok::ComdatVar)(static_cast <bool> (Lex.getKind() == lltok::ComdatVar)
 ? void (0) : __assert_fail ("Lex.getKind() == lltok::ComdatVar"
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 559, __extension__ __PRETTY_FUNCTION__));
std::string Name = Lex.getStrVal();
LocTy NameLoc = Lex.getLoc();
Lex.Lex();

if (ParseToken(lltok::equal, "expected '=' here"))
  return true;

if (ParseToken(lltok::kw_comdat, "expected comdat keyword"))
  return TokError("expected comdat type");

Comdat::SelectionKind SK;
switch (Lex.getKind()) {
default:
  return TokError("unknown selection kind");
case lltok::kw_any:
  SK = Comdat::Any;
  break;
case lltok::kw_exactmatch:
  SK = Comdat::ExactMatch;
  break;
case lltok::kw_largest:
  SK = Comdat::Largest;
  break;
case lltok::kw_noduplicates:
  SK = Comdat::NoDuplicates;
  break;
case lltok::kw_samesize:
  SK = Comdat::SameSize;
  break;
}
Lex.Lex();

// See if the comdat was forward referenced, if so, use the comdat.
Module::ComdatSymTabType &ComdatSymTab = M->getComdatSymbolTable();
Module::ComdatSymTabType::iterator I = ComdatSymTab.find(Name);
if (I != ComdatSymTab.end() && !ForwardRefComdats.erase(Name))
  return Error(NameLoc, "redefinition of comdat '$" + Name + "'");

Comdat *C;
if (I != ComdatSymTab.end())
  C = &I->second;
else
  C = M->getOrInsertComdat(Name);
C->setSelectionKind(SK);

return false;
606}

608// MDString:
609//   ::= '!' STRINGCONSTANT
610bool LLParser::ParseMDString(MDString *&Result) {
std::string Str;
if (ParseStringConstant(Str)) return true;
Result = MDString::get(Context, Str);
return false;
615}

617// MDNode:
618//   ::= '!' MDNodeNumber
619bool LLParser::ParseMDNodeID(MDNode *&Result) {
// !{ ..., !42, ... }
LocTy IDLoc = Lex.getLoc();
unsigned MID = 0;
if (ParseUInt32(MID))
  return true;

// If not a forward reference, just return it now.
if (NumberedMetadata.count(MID)) {
  Result = NumberedMetadata[MID];
  return false;
}

// Otherwise, create MDNode forward reference.
auto &FwdRef = ForwardRefMDNodes[MID];
FwdRef = std::make_pair(MDTuple::getTemporary(Context, None), IDLoc);

Result = FwdRef.first.get();
NumberedMetadata[MID].reset(Result);
return false;
639}

641/// ParseNamedMetadata:
642///   !foo = !{ !1, !2 }
643bool LLParser::ParseNamedMetadata() {
assert(Lex.getKind() == lltok::MetadataVar)(static_cast <bool> (Lex.getKind() == lltok::MetadataVar
) ? void (0) : __assert_fail ("Lex.getKind() == lltok::MetadataVar"
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 644, __extension__ __PRETTY_FUNCTION__));
std::string Name = Lex.getStrVal();
Lex.Lex();

if (ParseToken(lltok::equal, "expected '=' here") ||
    ParseToken(lltok::exclaim, "Expected '!' here") ||
    ParseToken(lltok::lbrace, "Expected '{' here"))
  return true;

NamedMDNode *NMD = M->getOrInsertNamedMetadata(Name);
if (Lex.getKind() != lltok::rbrace)
  do {
    MDNode *N = nullptr;
    // Parse DIExpressions inline as a special case. They are still MDNodes,
    // so they can still appear in named metadata. Remove this logic if they
    // become plain Metadata.
    if (Lex.getKind() == lltok::MetadataVar &&
        Lex.getStrVal() == "DIExpression") {
      if (ParseDIExpression(N, /*IsDistinct=*/false))
        return true;
    } else if (ParseToken(lltok::exclaim, "Expected '!' here") ||
               ParseMDNodeID(N)) {
      return true;
    }
    NMD->addOperand(N);
  } while (EatIfPresent(lltok::comma));

return ParseToken(lltok::rbrace, "expected end of metadata node");
672}

674/// ParseStandaloneMetadata:
675///   !42 = !{...}
676bool LLParser::ParseStandaloneMetadata() {
assert(Lex.getKind() == lltok::exclaim)(static_cast <bool> (Lex.getKind() == lltok::exclaim) ?
 void (0) : __assert_fail ("Lex.getKind() == lltok::exclaim",
 "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 677, __extension__ __PRETTY_FUNCTION__));
Lex.Lex();
unsigned MetadataID = 0;

MDNode *Init;
if (ParseUInt32(MetadataID) ||
    ParseToken(lltok::equal, "expected '=' here"))
  return true;

// Detect common error, from old metadata syntax.
if (Lex.getKind() == lltok::Type)
  return TokError("unexpected type in metadata definition");

bool IsDistinct = EatIfPresent(lltok::kw_distinct);
if (Lex.getKind() == lltok::MetadataVar) {
  if (ParseSpecializedMDNode(Init, IsDistinct))
    return true;
} else if (ParseToken(lltok::exclaim, "Expected '!' here") ||
           ParseMDTuple(Init, IsDistinct))
  return true;

// See if this was forward referenced, if so, handle it.
auto FI = ForwardRefMDNodes.find(MetadataID);
if (FI != ForwardRefMDNodes.end()) {
  FI->second.first->replaceAllUsesWith(Init);
  ForwardRefMDNodes.erase(FI);

  assert(NumberedMetadata[MetadataID] == Init && "Tracking VH didn't work")(static_cast <bool> (NumberedMetadata[MetadataID] == Init
 && "Tracking VH didn't work") ? void (0) : __assert_fail
 ("NumberedMetadata[MetadataID] == Init && \"Tracking VH didn't work\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 704, __extension__ __PRETTY_FUNCTION__));
} else {
  if (NumberedMetadata.count(MetadataID))
    return TokError("Metadata id is already used");
  NumberedMetadata[MetadataID].reset(Init);
}

return false;
712}

714static bool isValidVisibilityForLinkage(unsigned V, unsigned L) {
return !GlobalValue::isLocalLinkage((GlobalValue::LinkageTypes)L) ||
       (GlobalValue::VisibilityTypes)V == GlobalValue::DefaultVisibility;
717}

719// If there was an explicit dso_local, update GV. In the absence of an explicit
720// dso_local we keep the default value.
721static void maybeSetDSOLocal(bool DSOLocal, GlobalValue &GV) {
if (DSOLocal)
  GV.setDSOLocal(true);
724}

726/// parseIndirectSymbol:
727///   ::= GlobalVar '=' OptionalLinkage OptionalPreemptionSpecifier 
728///                     OptionalVisibility OptionalDLLStorageClass
729///                     OptionalThreadLocal OptionalUnnamedAddr
730//                      'alias|ifunc' IndirectSymbol
731///
732/// IndirectSymbol
733///   ::= TypeAndValue
734///
735/// Everything through OptionalUnnamedAddr has already been parsed.
736///
737bool LLParser::parseIndirectSymbol(const std::string &Name, LocTy NameLoc,
                                 unsigned L, unsigned Visibility,
                                 unsigned DLLStorageClass, bool DSOLocal,
                                 GlobalVariable::ThreadLocalMode TLM,
                                 GlobalVariable::UnnamedAddr UnnamedAddr) {
bool IsAlias;
if (Lex.getKind() == lltok::kw_alias)
  IsAlias = true;
else if (Lex.getKind() == lltok::kw_ifunc)
  IsAlias = false;
else
  llvm_unreachable("Not an alias or ifunc!")::llvm::llvm_unreachable_internal("Not an alias or ifunc!", "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 748);
Lex.Lex();

GlobalValue::LinkageTypes Linkage = (GlobalValue::LinkageTypes) L;

if(IsAlias && !GlobalAlias::isValidLinkage(Linkage))
  return Error(NameLoc, "invalid linkage type for alias");

if (!isValidVisibilityForLinkage(Visibility, L))
  return Error(NameLoc,
               "symbol with local linkage must have default visibility");

Type *Ty;
LocTy ExplicitTypeLoc = Lex.getLoc();
if (ParseType(Ty) ||
    ParseToken(lltok::comma, "expected comma after alias or ifunc's type"))
  return true;

Constant *Aliasee;
LocTy AliaseeLoc = Lex.getLoc();
if (Lex.getKind() != lltok::kw_bitcast &&
    Lex.getKind() != lltok::kw_getelementptr &&
    Lex.getKind() != lltok::kw_addrspacecast &&
    Lex.getKind() != lltok::kw_inttoptr) {
  if (ParseGlobalTypeAndValue(Aliasee))
    return true;
} else {
  // The bitcast dest type is not present, it is implied by the dest type.
  ValID ID;
  if (ParseValID(ID))
    return true;
  if (ID.Kind != ValID::t_Constant)
    return Error(AliaseeLoc, "invalid aliasee");
  Aliasee = ID.ConstantVal;
}

Type *AliaseeType = Aliasee->getType();
auto *PTy = dyn_cast<PointerType>(AliaseeType);
if (!PTy)
  return Error(AliaseeLoc, "An alias or ifunc must have pointer type");
unsigned AddrSpace = PTy->getAddressSpace();

if (IsAlias && Ty != PTy->getElementType())
  return Error(
      ExplicitTypeLoc,
      "explicit pointee type doesn't match operand's pointee type");

if (!IsAlias && !PTy->getElementType()->isFunctionTy())
  return Error(
      ExplicitTypeLoc,
      "explicit pointee type should be a function type");

GlobalValue *GVal = nullptr;

// See if the alias was forward referenced, if so, prepare to replace the
// forward reference.
if (!Name.empty()) {
  GVal = M->getNamedValue(Name);
  if (GVal) {
    if (!ForwardRefVals.erase(Name))
      return Error(NameLoc, "redefinition of global '@" + Name + "'");
  }
} else {
  auto I = ForwardRefValIDs.find(NumberedVals.size());
  if (I != ForwardRefValIDs.end()) {
    GVal = I->second.first;
    ForwardRefValIDs.erase(I);
  }
}

// Okay, create the alias but do not insert it into the module yet.
std::unique_ptr<GlobalIndirectSymbol> GA;
if (IsAlias)
  GA.reset(GlobalAlias::create(Ty, AddrSpace,
                               (GlobalValue::LinkageTypes)Linkage, Name,
                               Aliasee, /*Parent*/ nullptr));
else
  GA.reset(GlobalIFunc::create(Ty, AddrSpace,
                               (GlobalValue::LinkageTypes)Linkage, Name,
                               Aliasee, /*Parent*/ nullptr));
GA->setThreadLocalMode(TLM);
GA->setVisibility((GlobalValue::VisibilityTypes)Visibility);
GA->setDLLStorageClass((GlobalValue::DLLStorageClassTypes)DLLStorageClass);
GA->setUnnamedAddr(UnnamedAddr);
maybeSetDSOLocal(DSOLocal, *GA);

if (Name.empty())
  NumberedVals.push_back(GA.get());

if (GVal) {
  // Verify that types agree.
  if (GVal->getType() != GA->getType())
    return Error(
        ExplicitTypeLoc,
        "forward reference and definition of alias have different types");

  // If they agree, just RAUW the old value with the alias and remove the
  // forward ref info.
  GVal->replaceAllUsesWith(GA.get());
  GVal->eraseFromParent();
}

// Insert into the module, we know its name won't collide now.
if (IsAlias)
  M->getAliasList().push_back(cast<GlobalAlias>(GA.get()));
else
  M->getIFuncList().push_back(cast<GlobalIFunc>(GA.get()));
assert(GA->getName() == Name && "Should not be a name conflict!")(static_cast <bool> (GA->getName() == Name &&
 "Should not be a name conflict!") ? void (0) : __assert_fail
 ("GA->getName() == Name && \"Should not be a name conflict!\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 855, __extension__ __PRETTY_FUNCTION__));

// The module owns this now
GA.release();

return false;
861}

863/// ParseGlobal
864///   ::= GlobalVar '=' OptionalLinkage OptionalPreemptionSpecifier
865///       OptionalVisibility OptionalDLLStorageClass
866///       OptionalThreadLocal OptionalUnnamedAddr OptionalAddrSpace
867///       OptionalExternallyInitialized GlobalType Type Const OptionalAttrs
868///   ::= OptionalLinkage OptionalPreemptionSpecifier OptionalVisibility
869///       OptionalDLLStorageClass OptionalThreadLocal OptionalUnnamedAddr
870///       OptionalAddrSpace OptionalExternallyInitialized GlobalType Type
871///       Const OptionalAttrs
872///
873/// Everything up to and including OptionalUnnamedAddr has been parsed
874/// already.
875///
876bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc,
                         unsigned Linkage, bool HasLinkage,
                         unsigned Visibility, unsigned DLLStorageClass,
                         bool DSOLocal, GlobalVariable::ThreadLocalMode TLM,
                         GlobalVariable::UnnamedAddr UnnamedAddr) {
if (!isValidVisibilityForLinkage(Visibility, Linkage))
  return Error(NameLoc,
               "symbol with local linkage must have default visibility");

unsigned AddrSpace;
bool IsConstant, IsExternallyInitialized;
LocTy IsExternallyInitializedLoc;
LocTy TyLoc;

Type *Ty = nullptr;
if (ParseOptionalAddrSpace(AddrSpace) ||
    ParseOptionalToken(lltok::kw_externally_initialized,
                       IsExternallyInitialized,
                       &IsExternallyInitializedLoc) ||
    ParseGlobalType(IsConstant) ||
    ParseType(Ty, TyLoc))
  return true;

// If the linkage is specified and is external, then no initializer is
// present.
Constant *Init = nullptr;
if (!HasLinkage ||
    !GlobalValue::isValidDeclarationLinkage(
        (GlobalValue::LinkageTypes)Linkage)) {
  if (ParseGlobalValue(Ty, Init))
    return true;
}

if (Ty->isFunctionTy() || !PointerType::isValidElementType(Ty))
  return Error(TyLoc, "invalid type for global variable");

GlobalValue *GVal = nullptr;

// See if the global was forward referenced, if so, use the global.
if (!Name.empty()) {
  GVal = M->getNamedValue(Name);
  if (GVal) {
    if (!ForwardRefVals.erase(Name))
      return Error(NameLoc, "redefinition of global '@" + Name + "'");
  }
} else {
  auto I = ForwardRefValIDs.find(NumberedVals.size());
  if (I != ForwardRefValIDs.end()) {
    GVal = I->second.first;
    ForwardRefValIDs.erase(I);
  }
}

GlobalVariable *GV;
if (!GVal) {
  GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, nullptr,
                          Name, nullptr, GlobalVariable::NotThreadLocal,
                          AddrSpace);
} else {
  if (GVal->getValueType() != Ty)
    return Error(TyLoc,
          "forward reference and definition of global have different types");

  GV = cast<GlobalVariable>(GVal);

  // Move the forward-reference to the correct spot in the module.
  M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV);
}

if (Name.empty())
  NumberedVals.push_back(GV);

// Set the parsed properties on the global.
if (Init)
  GV->setInitializer(Init);
GV->setConstant(IsConstant);
GV->setLinkage((GlobalValue::LinkageTypes)Linkage);
maybeSetDSOLocal(DSOLocal, *GV);
GV->setVisibility((GlobalValue::VisibilityTypes)Visibility);
GV->setDLLStorageClass((GlobalValue::DLLStorageClassTypes)DLLStorageClass);
GV->setExternallyInitialized(IsExternallyInitialized);
GV->setThreadLocalMode(TLM);
GV->setUnnamedAddr(UnnamedAddr);

// Parse attributes on the global.
while (Lex.getKind() == lltok::comma) {
  Lex.Lex();

  if (Lex.getKind() == lltok::kw_section) {
    Lex.Lex();
    GV->setSection(Lex.getStrVal());
    if (ParseToken(lltok::StringConstant, "expected global section string"))
      return true;
  } else if (Lex.getKind() == lltok::kw_align) {
    unsigned Alignment;
    if (ParseOptionalAlignment(Alignment)) return true;
    GV->setAlignment(Alignment);
  } else if (Lex.getKind() == lltok::MetadataVar) {
    if (ParseGlobalObjectMetadataAttachment(*GV))
      return true;
  } else {
    Comdat *C;
    if (parseOptionalComdat(Name, C))
      return true;
    if (C)
      GV->setComdat(C);
    else
      return TokError("unknown global variable property!");
  }
}

AttrBuilder Attrs;
LocTy BuiltinLoc;
std::vector<unsigned> FwdRefAttrGrps;
if (ParseFnAttributeValuePairs(Attrs, FwdRefAttrGrps, false, BuiltinLoc))
  return true;
if (Attrs.hasAttributes() || !FwdRefAttrGrps.empty()) {
  GV->setAttributes(AttributeSet::get(Context, Attrs));
  ForwardRefAttrGroups[GV] = FwdRefAttrGrps;
}

return false;
998}

1000/// ParseUnnamedAttrGrp
1001///   ::= 'attributes' AttrGrpID '=' '{' AttrValPair+ '}'
1002bool LLParser::ParseUnnamedAttrGrp() {
assert(Lex.getKind() == lltok::kw_attributes)(static_cast <bool> (Lex.getKind() == lltok::kw_attributes
) ? void (0) : __assert_fail ("Lex.getKind() == lltok::kw_attributes"
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 1003, __extension__ __PRETTY_FUNCTION__));
LocTy AttrGrpLoc = Lex.getLoc();
Lex.Lex();

if (Lex.getKind() != lltok::AttrGrpID)
1
Assuming the condition is false→
2
←
Taking false branch→
  return TokError("expected attribute group id");

unsigned VarID = Lex.getUIntVal();
std::vector<unsigned> unused;
LocTy BuiltinLoc;
Lex.Lex();

if (ParseToken(lltok::equal, "expected '=' here") ||
    ParseToken(lltok::lbrace, "expected '{' here") ||
    ParseFnAttributeValuePairs(NumberedAttrBuilders[VarID], unused, true,
3
←
Calling 'LLParser::ParseFnAttributeValuePairs'→
                               BuiltinLoc) ||
    ParseToken(lltok::rbrace, "expected end of attribute group"))
  return true;

if (!NumberedAttrBuilders[VarID].hasAttributes())
  return Error(AttrGrpLoc, "attribute group has no attributes");

return false;
1026}

1028/// ParseFnAttributeValuePairs
1029///   ::= <attr> | <attr> '=' <value>
1030bool LLParser::ParseFnAttributeValuePairs(AttrBuilder &B,
                                        std::vector<unsigned> &FwdRefAttrGrps,
                                        bool inAttrGrp, LocTy &BuiltinLoc) {
bool HaveError = false;

B.clear();

while (true) {
4
←
Loop condition is true.  Entering loop body→
9
←
Loop condition is true.  Entering loop body→
14
←
Loop condition is true.  Entering loop body→
19
←
Loop condition is true.  Entering loop body→
  lltok::Kind Token = Lex.getKind();
  if (Token == lltok::kw_builtin)
5
←
Assuming 'Token' is not equal to kw_builtin→
6
←
Taking false branch→
10
←
Assuming 'Token' is not equal to kw_builtin→
11
←
Taking false branch→
15
←
Assuming 'Token' is not equal to kw_builtin→
16
←
Taking false branch→
20
←
Assuming 'Token' is not equal to kw_builtin→
21
←
Taking false branch→
    BuiltinLoc = Lex.getLoc();
  switch (Token) {
7
←
Control jumps to 'case kw_byval:'  at line 1168→
12
←
Control jumps to 'case kw_byval:'  at line 1168→
17
←
Control jumps to 'case kw_writeonly:'  at line 1158→
22
←
Control jumps to 'case kw_allocsize:'  at line 1104→
  default:
    if (!inAttrGrp) return HaveError;
    return Error(Lex.getLoc(), "unterminated attribute group");
  case lltok::rbrace:
    // Finished.
    return false;

  case lltok::AttrGrpID: {
    // Allow a function to reference an attribute group:
    //
    //   define void @foo() #1 { ... }
    if (inAttrGrp)
      HaveError |=
        Error(Lex.getLoc(),
            "cannot have an attribute group reference in an attribute group");

    unsigned AttrGrpNum = Lex.getUIntVal();
    if (inAttrGrp) break;

    // Save the reference to the attribute group. We'll fill it in later.
    FwdRefAttrGrps.push_back(AttrGrpNum);
    break;
  }
  // Target-dependent attributes:
  case lltok::StringConstant: {
    if (ParseStringAttribute(B))
      return true;
    continue;
  }

  // Target-independent attributes:
  case lltok::kw_align: {
    // As a hack, we allow function alignment to be initially parsed as an
    // attribute on a function declaration/definition or added to an attribute
    // group and later moved to the alignment field.
    unsigned Alignment;
    if (inAttrGrp) {
      Lex.Lex();
      if (ParseToken(lltok::equal, "expected '=' here") ||
          ParseUInt32(Alignment))
        return true;
    } else {
      if (ParseOptionalAlignment(Alignment))
        return true;
    }
    B.addAlignmentAttr(Alignment);
    continue;
  }
  case lltok::kw_alignstack: {
    unsigned Alignment;
    if (inAttrGrp) {
      Lex.Lex();
      if (ParseToken(lltok::equal, "expected '=' here") ||
          ParseUInt32(Alignment))
        return true;
    } else {
      if (ParseOptionalStackAlignment(Alignment))
        return true;
    }
    B.addStackAlignmentAttr(Alignment);
    continue;
  }
  case lltok::kw_allocsize: {
    unsigned ElemSizeArg;
23
←
'ElemSizeArg' declared without an initial value→
    Optional<unsigned> NumElemsArg;
    // inAttrGrp doesn't matter; we only support allocsize(a[, b])
    if (parseAllocSizeArguments(ElemSizeArg, NumElemsArg))
24
←
Passing value via 1st parameter 'BaseSizeArg'→
25
←
Calling 'LLParser::parseAllocSizeArguments'→
      return true;
    B.addAllocSizeAttr(ElemSizeArg, NumElemsArg);
    continue;
  }
  case lltok::kw_alwaysinline: B.addAttribute(Attribute::AlwaysInline); break;
  case lltok::kw_argmemonly: B.addAttribute(Attribute::ArgMemOnly); break;
  case lltok::kw_builtin: B.addAttribute(Attribute::Builtin); break;
  case lltok::kw_cold: B.addAttribute(Attribute::Cold); break;
  case lltok::kw_convergent: B.addAttribute(Attribute::Convergent); break;
  case lltok::kw_inaccessiblememonly:
    B.addAttribute(Attribute::InaccessibleMemOnly); break;
  case lltok::kw_inaccessiblemem_or_argmemonly:
    B.addAttribute(Attribute::InaccessibleMemOrArgMemOnly); break;
  case lltok::kw_inlinehint: B.addAttribute(Attribute::InlineHint); break;
  case lltok::kw_jumptable: B.addAttribute(Attribute::JumpTable); break;
  case lltok::kw_minsize: B.addAttribute(Attribute::MinSize); break;
  case lltok::kw_naked: B.addAttribute(Attribute::Naked); break;
  case lltok::kw_nobuiltin: B.addAttribute(Attribute::NoBuiltin); break;
  case lltok::kw_noduplicate: B.addAttribute(Attribute::NoDuplicate); break;
  case lltok::kw_noimplicitfloat:
    B.addAttribute(Attribute::NoImplicitFloat); break;
  case lltok::kw_noinline: B.addAttribute(Attribute::NoInline); break;
  case lltok::kw_nonlazybind: B.addAttribute(Attribute::NonLazyBind); break;
  case lltok::kw_noredzone: B.addAttribute(Attribute::NoRedZone); break;
  case lltok::kw_noreturn: B.addAttribute(Attribute::NoReturn); break;
  case lltok::kw_norecurse: B.addAttribute(Attribute::NoRecurse); break;
  case lltok::kw_nounwind: B.addAttribute(Attribute::NoUnwind); break;
  case lltok::kw_optnone: B.addAttribute(Attribute::OptimizeNone); break;
  case lltok::kw_optsize: B.addAttribute(Attribute::OptimizeForSize); break;
  case lltok::kw_readnone: B.addAttribute(Attribute::ReadNone); break;
  case lltok::kw_readonly: B.addAttribute(Attribute::ReadOnly); break;
  case lltok::kw_returns_twice:
    B.addAttribute(Attribute::ReturnsTwice); break;
  case lltok::kw_speculatable: B.addAttribute(Attribute::Speculatable); break;
  case lltok::kw_ssp: B.addAttribute(Attribute::StackProtect); break;
  case lltok::kw_sspreq: B.addAttribute(Attribute::StackProtectReq); break;
  case lltok::kw_sspstrong:
    B.addAttribute(Attribute::StackProtectStrong); break;
  case lltok::kw_safestack: B.addAttribute(Attribute::SafeStack); break;
  case lltok::kw_sanitize_address:
    B.addAttribute(Attribute::SanitizeAddress); break;
  case lltok::kw_sanitize_hwaddress:
    B.addAttribute(Attribute::SanitizeHWAddress); break;
  case lltok::kw_sanitize_thread:
    B.addAttribute(Attribute::SanitizeThread); break;
  case lltok::kw_sanitize_memory:
    B.addAttribute(Attribute::SanitizeMemory); break;
  case lltok::kw_strictfp: B.addAttribute(Attribute::StrictFP); break;
  case lltok::kw_uwtable: B.addAttribute(Attribute::UWTable); break;
  case lltok::kw_writeonly: B.addAttribute(Attribute::WriteOnly); break;
18
←
 Execution continues on line 1186→

  // Error handling.
  case lltok::kw_inreg:
  case lltok::kw_signext:
  case lltok::kw_zeroext:
    HaveError |=
      Error(Lex.getLoc(),
            "invalid use of attribute on a function");
    break;
  case lltok::kw_byval:
  case lltok::kw_dereferenceable:
  case lltok::kw_dereferenceable_or_null:
  case lltok::kw_inalloca:
  case lltok::kw_nest:
  case lltok::kw_noalias:
  case lltok::kw_nocapture:
  case lltok::kw_nonnull:
  case lltok::kw_returned:
  case lltok::kw_sret:
  case lltok::kw_swifterror:
  case lltok::kw_swiftself:
    HaveError |=
      Error(Lex.getLoc(),
            "invalid use of parameter-only attribute on a function");
    break;
8
←
 Execution continues on line 1186→
13
←
 Execution continues on line 1186→
  }

  Lex.Lex();
}
1188}

1190//===----------------------------------------------------------------------===//
1191// GlobalValue Reference/Resolution Routines.
1192//===----------------------------------------------------------------------===//

1194static inline GlobalValue *createGlobalFwdRef(Module *M, PointerType *PTy,
                                            const std::string &Name) {
if (auto *FT = dyn_cast<FunctionType>(PTy->getElementType()))
  return Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M);
else
  return new GlobalVariable(*M, PTy->getElementType(), false,
                            GlobalValue::ExternalWeakLinkage, nullptr, Name,
                            nullptr, GlobalVariable::NotThreadLocal,
                            PTy->getAddressSpace());
1203}

1205/// GetGlobalVal - Get a value with the specified name or ID, creating a
1206/// forward reference record if needed.  This can return null if the value
1207/// exists but does not have the right type.
1208GlobalValue *LLParser::GetGlobalVal(const std::string &Name, Type *Ty,
                                  LocTy Loc) {
PointerType *PTy = dyn_cast<PointerType>(Ty);
if (!PTy) {
  Error(Loc, "global variable reference must have pointer type");
  return nullptr;
}

// Look this name up in the normal function symbol table.
GlobalValue *Val =
  cast_or_null<GlobalValue>(M->getValueSymbolTable().lookup(Name));

// If this is a forward reference for the value, see if we already created a
// forward ref record.
if (!Val) {
  auto I = ForwardRefVals.find(Name);
  if (I != ForwardRefVals.end())
    Val = I->second.first;
}

// If we have the value in the symbol table or fwd-ref table, return it.
if (Val) {
  if (Val->getType() == Ty) return Val;
  Error(Loc, "'@" + Name + "' defined with type '" +
        getTypeString(Val->getType()) + "'");
  return nullptr;
}

// Otherwise, create a new forward reference for this value and remember it.
GlobalValue *FwdVal = createGlobalFwdRef(M, PTy, Name);
ForwardRefVals[Name] = std::make_pair(FwdVal, Loc);
return FwdVal;
1240}

1242GlobalValue *LLParser::GetGlobalVal(unsigned ID, Type *Ty, LocTy Loc) {
PointerType *PTy = dyn_cast<PointerType>(Ty);
if (!PTy) {
  Error(Loc, "global variable reference must have pointer type");
  return nullptr;
}

GlobalValue *Val = ID < NumberedVals.size() ? NumberedVals[ID] : nullptr;

// If this is a forward reference for the value, see if we already created a
// forward ref record.
if (!Val) {
  auto I = ForwardRefValIDs.find(ID);
  if (I != ForwardRefValIDs.end())
    Val = I->second.first;
}

// If we have the value in the symbol table or fwd-ref table, return it.
if (Val) {
  if (Val->getType() == Ty) return Val;
  Error(Loc, "'@" + Twine(ID) + "' defined with type '" +
        getTypeString(Val->getType()) + "'");
  return nullptr;
}

// Otherwise, create a new forward reference for this value and remember it.
GlobalValue *FwdVal = createGlobalFwdRef(M, PTy, "");
ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc);
return FwdVal;
1271}

1273//===----------------------------------------------------------------------===//
1274// Comdat Reference/Resolution Routines.
1275//===----------------------------------------------------------------------===//

1277Comdat *LLParser::getComdat(const std::string &Name, LocTy Loc) {
// Look this name up in the comdat symbol table.
Module::ComdatSymTabType &ComdatSymTab = M->getComdatSymbolTable();
Module::ComdatSymTabType::iterator I = ComdatSymTab.find(Name);
if (I != ComdatSymTab.end())
  return &I->second;

// Otherwise, create a new forward reference for this value and remember it.
Comdat *C = M->getOrInsertComdat(Name);
ForwardRefComdats[Name] = Loc;
return C;
1288}

1290//===----------------------------------------------------------------------===//
1291// Helper Routines.
1292//===----------------------------------------------------------------------===//

1294/// ParseToken - If the current token has the specified kind, eat it and return
1295/// success.  Otherwise, emit the specified error and return failure.
1296bool LLParser::ParseToken(lltok::Kind T, const char *ErrMsg) {
if (Lex.getKind() != T)
  return TokError(ErrMsg);
Lex.Lex();
return false;
1301}

1303/// ParseStringConstant
1304///   ::= StringConstant
1305bool LLParser::ParseStringConstant(std::string &Result) {
if (Lex.getKind() != lltok::StringConstant)
  return TokError("expected string constant");
Result = Lex.getStrVal();
Lex.Lex();
return false;
1311}

1313/// ParseUInt32
1314///   ::= uint32
1315bool LLParser::ParseUInt32(uint32_t &Val) {
if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned())
44
←
Calling 'LLLexer::getKind'→
45
←
Returning from 'LLLexer::getKind'→
46
←
Assuming the condition is true→
85
←
Calling 'LLLexer::getKind'→
86
←
Returning from 'LLLexer::getKind'→
87
←
Assuming the condition is false→
88
←
Calling 'LLLexer::getAPSIntVal'→
89
←
Returning from 'LLLexer::getAPSIntVal'→
90
←
Calling 'APSInt::isSigned'→
92
←
Returning from 'APSInt::isSigned'→
93
←
Taking false branch→
  return TokError("expected integer");
47
←
Calling constructor for 'Twine'→
54
←
Returning from constructor for 'Twine'→
55
←
Calling 'LLParser::TokError'→
64
←
Returning from 'LLParser::TokError'→
65
←
Returning without writing to 'Val'→
uint64_t Val64 = Lex.getAPSIntVal().getLimitedValue(0xFFFFFFFFULL+1);
94
←
Calling 'LLLexer::getAPSIntVal'→
95
←
Returning from 'LLLexer::getAPSIntVal'→
96
←
Calling 'APInt::getLimitedValue'→
99
←
Returning from 'APInt::getLimitedValue'→
if (Val64 != unsigned(Val64))
100
←
Taking false branch→
  return TokError("expected 32-bit integer (too large)");
Val = Val64;
Lex.Lex();
101
←
Calling 'LLLexer::Lex'→
102
←
Returning from 'LLLexer::Lex'→
return false;
1324}

1326/// ParseUInt64
1327///   ::= uint64
1328bool LLParser::ParseUInt64(uint64_t &Val) {
if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned())
  return TokError("expected integer");
Val = Lex.getAPSIntVal().getLimitedValue();
Lex.Lex();
return false;
1334}

1336/// ParseTLSModel
1337///   := 'localdynamic'
1338///   := 'initialexec'
1339///   := 'localexec'
1340bool LLParser::ParseTLSModel(GlobalVariable::ThreadLocalMode &TLM) {
switch (Lex.getKind()) {
  default:
    return TokError("expected localdynamic, initialexec or localexec");
  case lltok::kw_localdynamic:
    TLM = GlobalVariable::LocalDynamicTLSModel;
    break;
  case lltok::kw_initialexec:
    TLM = GlobalVariable::InitialExecTLSModel;
    break;
  case lltok::kw_localexec:
    TLM = GlobalVariable::LocalExecTLSModel;
    break;
}

Lex.Lex();
return false;
1357}

1359/// ParseOptionalThreadLocal
1360///   := /*empty*/
1361///   := 'thread_local'
1362///   := 'thread_local' '(' tlsmodel ')'
1363bool LLParser::ParseOptionalThreadLocal(GlobalVariable::ThreadLocalMode &TLM) {
TLM = GlobalVariable::NotThreadLocal;
if (!EatIfPresent(lltok::kw_thread_local))
  return false;

TLM = GlobalVariable::GeneralDynamicTLSModel;
if (Lex.getKind() == lltok::lparen) {
  Lex.Lex();
  return ParseTLSModel(TLM) ||
    ParseToken(lltok::rparen, "expected ')' after thread local model");
}
return false;
1375}

1377/// ParseOptionalAddrSpace
1378///   := /*empty*/
1379///   := 'addrspace' '(' uint32 ')'
1380bool LLParser::ParseOptionalAddrSpace(unsigned &AddrSpace) {
AddrSpace = 0;
if (!EatIfPresent(lltok::kw_addrspace))
  return false;
return ParseToken(lltok::lparen, "expected '(' in address space") ||
       ParseUInt32(AddrSpace) ||
       ParseToken(lltok::rparen, "expected ')' in address space");
1387}

1389/// ParseStringAttribute
1390///   := StringConstant
1391///   := StringConstant '=' StringConstant
1392bool LLParser::ParseStringAttribute(AttrBuilder &B) {
std::string Attr = Lex.getStrVal();
Lex.Lex();
std::string Val;
if (EatIfPresent(lltok::equal) && ParseStringConstant(Val))
  return true;
B.addAttribute(Attr, Val);
return false;
1400}

1402/// ParseOptionalParamAttrs - Parse a potentially empty list of parameter attributes.
1403bool LLParser::ParseOptionalParamAttrs(AttrBuilder &B) {
bool HaveError = false;

B.clear();

while (true) {
  lltok::Kind Token = Lex.getKind();
  switch (Token) {
  default:  // End of attributes.
    return HaveError;
  case lltok::StringConstant: {
    if (ParseStringAttribute(B))
      return true;
    continue;
  }
  case lltok::kw_align: {
    unsigned Alignment;
    if (ParseOptionalAlignment(Alignment))
      return true;
    B.addAlignmentAttr(Alignment);
    continue;
  }
  case lltok::kw_byval:           B.addAttribute(Attribute::ByVal); break;
  case lltok::kw_dereferenceable: {
    uint64_t Bytes;
    if (ParseOptionalDerefAttrBytes(lltok::kw_dereferenceable, Bytes))
      return true;
    B.addDereferenceableAttr(Bytes);
    continue;
  }
  case lltok::kw_dereferenceable_or_null: {
    uint64_t Bytes;
    if (ParseOptionalDerefAttrBytes(lltok::kw_dereferenceable_or_null, Bytes))
      return true;
    B.addDereferenceableOrNullAttr(Bytes);
    continue;
  }
  case lltok::kw_inalloca:        B.addAttribute(Attribute::InAlloca); break;
  case lltok::kw_inreg:           B.addAttribute(Attribute::InReg); break;
  case lltok::kw_nest:            B.addAttribute(Attribute::Nest); break;
  case lltok::kw_noalias:         B.addAttribute(Attribute::NoAlias); break;
  case lltok::kw_nocapture:       B.addAttribute(Attribute::NoCapture); break;
  case lltok::kw_nonnull:         B.addAttribute(Attribute::NonNull); break;
  case lltok::kw_readnone:        B.addAttribute(Attribute::ReadNone); break;
  case lltok::kw_readonly:        B.addAttribute(Attribute::ReadOnly); break;
  case lltok::kw_returned:        B.addAttribute(Attribute::Returned); break;
  case lltok::kw_signext:         B.addAttribute(Attribute::SExt); break;
  case lltok::kw_sret:            B.addAttribute(Attribute::StructRet); break;
  case lltok::kw_swifterror:      B.addAttribute(Attribute::SwiftError); break;
  case lltok::kw_swiftself:       B.addAttribute(Attribute::SwiftSelf); break;
  case lltok::kw_writeonly:       B.addAttribute(Attribute::WriteOnly); break;
  case lltok::kw_zeroext:         B.addAttribute(Attribute::ZExt); break;

  case lltok::kw_alignstack:
  case lltok::kw_alwaysinline:
  case lltok::kw_argmemonly:
  case lltok::kw_builtin:
  case lltok::kw_inlinehint:
  case lltok::kw_jumptable:
  case lltok::kw_minsize:
  case lltok::kw_naked:
  case lltok::kw_nobuiltin:
  case lltok::kw_noduplicate:
  case lltok::kw_noimplicitfloat:
  case lltok::kw_noinline:
  case lltok::kw_nonlazybind:
  case lltok::kw_noredzone:
  case lltok::kw_noreturn:
  case lltok::kw_nounwind:
  case lltok::kw_optnone:
  case lltok::kw_optsize:
  case lltok::kw_returns_twice:
  case lltok::kw_sanitize_address:
  case lltok::kw_sanitize_hwaddress:
  case lltok::kw_sanitize_memory:
  case lltok::kw_sanitize_thread:
  case lltok::kw_ssp:
  case lltok::kw_sspreq:
  case lltok::kw_sspstrong:
  case lltok::kw_safestack:
  case lltok::kw_strictfp:
  case lltok::kw_uwtable:
    HaveError |= Error(Lex.getLoc(), "invalid use of function-only attribute");
    break;
  }

  Lex.Lex();
}
1491}

1493/// ParseOptionalReturnAttrs - Parse a potentially empty list of return attributes.
1494bool LLParser::ParseOptionalReturnAttrs(AttrBuilder &B) {
bool HaveError = false;

B.clear();

while (true) {
  lltok::Kind Token = Lex.getKind();
  switch (Token) {
  default:  // End of attributes.
    return HaveError;
  case lltok::StringConstant: {
    if (ParseStringAttribute(B))
      return true;
    continue;
  }
  case lltok::kw_dereferenceable: {
    uint64_t Bytes;
    if (ParseOptionalDerefAttrBytes(lltok::kw_dereferenceable, Bytes))
      return true;
    B.addDereferenceableAttr(Bytes);
    continue;
  }
  case lltok::kw_dereferenceable_or_null: {
    uint64_t Bytes;
    if (ParseOptionalDerefAttrBytes(lltok::kw_dereferenceable_or_null, Bytes))
      return true;
    B.addDereferenceableOrNullAttr(Bytes);
    continue;
  }
  case lltok::kw_align: {
    unsigned Alignment;
    if (ParseOptionalAlignment(Alignment))
      return true;
    B.addAlignmentAttr(Alignment);
    continue;
  }
  case lltok::kw_inreg:           B.addAttribute(Attribute::InReg); break;
  case lltok::kw_noalias:         B.addAttribute(Attribute::NoAlias); break;
  case lltok::kw_nonnull:         B.addAttribute(Attribute::NonNull); break;
  case lltok::kw_signext:         B.addAttribute(Attribute::SExt); break;
  case lltok::kw_zeroext:         B.addAttribute(Attribute::ZExt); break;

  // Error handling.
  case lltok::kw_byval:
  case lltok::kw_inalloca:
  case lltok::kw_nest:
  case lltok::kw_nocapture:
  case lltok::kw_returned:
  case lltok::kw_sret:
  case lltok::kw_swifterror:
  case lltok::kw_swiftself:
    HaveError |= Error(Lex.getLoc(), "invalid use of parameter-only attribute");
    break;

  case lltok::kw_alignstack:
  case lltok::kw_alwaysinline:
  case lltok::kw_argmemonly:
  case lltok::kw_builtin:
  case lltok::kw_cold:
  case lltok::kw_inlinehint:
  case lltok::kw_jumptable:
  case lltok::kw_minsize:
  case lltok::kw_naked:
  case lltok::kw_nobuiltin:
  case lltok::kw_noduplicate:
  case lltok::kw_noimplicitfloat:
  case lltok::kw_noinline:
  case lltok::kw_nonlazybind:
  case lltok::kw_noredzone:
  case lltok::kw_noreturn:
  case lltok::kw_nounwind:
  case lltok::kw_optnone:
  case lltok::kw_optsize:
  case lltok::kw_returns_twice:
  case lltok::kw_sanitize_address:
  case lltok::kw_sanitize_hwaddress:
  case lltok::kw_sanitize_memory:
  case lltok::kw_sanitize_thread:
  case lltok::kw_ssp:
  case lltok::kw_sspreq:
  case lltok::kw_sspstrong:
  case lltok::kw_safestack:
  case lltok::kw_strictfp:
  case lltok::kw_uwtable:
    HaveError |= Error(Lex.getLoc(), "invalid use of function-only attribute");
    break;

  case lltok::kw_readnone:
  case lltok::kw_readonly:
    HaveError |= Error(Lex.getLoc(), "invalid use of attribute on return type");
  }

  Lex.Lex();
}
1588}

1590static unsigned parseOptionalLinkageAux(lltok::Kind Kind, bool &HasLinkage) {
HasLinkage = true;
switch (Kind) {
default:
  HasLinkage = false;
  return GlobalValue::ExternalLinkage;
case lltok::kw_private:
  return GlobalValue::PrivateLinkage;
case lltok::kw_internal:
  return GlobalValue::InternalLinkage;
case lltok::kw_weak:
  return GlobalValue::WeakAnyLinkage;
case lltok::kw_weak_odr:
  return GlobalValue::WeakODRLinkage;
case lltok::kw_linkonce:
  return GlobalValue::LinkOnceAnyLinkage;
case lltok::kw_linkonce_odr:
  return GlobalValue::LinkOnceODRLinkage;
case lltok::kw_available_externally:
  return GlobalValue::AvailableExternallyLinkage;
case lltok::kw_appending:
  return GlobalValue::AppendingLinkage;
case lltok::kw_common:
  return GlobalValue::CommonLinkage;
case lltok::kw_extern_weak:
  return GlobalValue::ExternalWeakLinkage;
case lltok::kw_external:
  return GlobalValue::ExternalLinkage;
}
1619}

1621/// ParseOptionalLinkage
1622///   ::= /*empty*/
1623///   ::= 'private'
1624///   ::= 'internal'
1625///   ::= 'weak'
1626///   ::= 'weak_odr'
1627///   ::= 'linkonce'
1628///   ::= 'linkonce_odr'
1629///   ::= 'available_externally'
1630///   ::= 'appending'
1631///   ::= 'common'
1632///   ::= 'extern_weak'
1633///   ::= 'external'
1634bool LLParser::ParseOptionalLinkage(unsigned &Res, bool &HasLinkage,
                                  unsigned &Visibility,
                                  unsigned &DLLStorageClass,
                                  bool &DSOLocal) {
Res = parseOptionalLinkageAux(Lex.getKind(), HasLinkage);
if (HasLinkage)
  Lex.Lex();
ParseOptionalDSOLocal(DSOLocal);
ParseOptionalVisibility(Visibility);
ParseOptionalDLLStorageClass(DLLStorageClass);

if (DSOLocal && DLLStorageClass == GlobalValue::DLLImportStorageClass) {
  return Error(Lex.getLoc(), "dso_location and DLL-StorageClass mismatch");
}

return false;
1650}

1652void LLParser::ParseOptionalDSOLocal(bool &DSOLocal) {
switch (Lex.getKind()) {
default:
  DSOLocal = false;
  break;
case lltok::kw_dso_local:
  DSOLocal = true;
  Lex.Lex();
  break;
case lltok::kw_dso_preemptable:
  DSOLocal = false;
  Lex.Lex();
  break;
}
1666}

1668/// ParseOptionalVisibility
1669///   ::= /*empty*/
1670///   ::= 'default'
1671///   ::= 'hidden'
1672///   ::= 'protected'
1673///
1674void LLParser::ParseOptionalVisibility(unsigned &Res) {
switch (Lex.getKind()) {
default:
  Res = GlobalValue::DefaultVisibility;
  return;
case lltok::kw_default:
  Res = GlobalValue::DefaultVisibility;
  break;
case lltok::kw_hidden:
  Res = GlobalValue::HiddenVisibility;
  break;
case lltok::kw_protected:
  Res = GlobalValue::ProtectedVisibility;
  break;
}
Lex.Lex();
1690}

1692/// ParseOptionalDLLStorageClass
1693///   ::= /*empty*/
1694///   ::= 'dllimport'
1695///   ::= 'dllexport'
1696///
1697void LLParser::ParseOptionalDLLStorageClass(unsigned &Res) {
switch (Lex.getKind()) {
default:
  Res = GlobalValue::DefaultStorageClass;
  return;
case lltok::kw_dllimport:
  Res = GlobalValue::DLLImportStorageClass;
  break;
case lltok::kw_dllexport:
  Res = GlobalValue::DLLExportStorageClass;
  break;
}
Lex.Lex();
1710}

1712/// ParseOptionalCallingConv
1713///   ::= /*empty*/
1714///   ::= 'ccc'
1715///   ::= 'fastcc'
1716///   ::= 'intel_ocl_bicc'
1717///   ::= 'coldcc'
1718///   ::= 'x86_stdcallcc'
1719///   ::= 'x86_fastcallcc'
1720///   ::= 'x86_thiscallcc'
1721///   ::= 'x86_vectorcallcc'
1722///   ::= 'arm_apcscc'
1723///   ::= 'arm_aapcscc'
1724///   ::= 'arm_aapcs_vfpcc'
1725///   ::= 'msp430_intrcc'
1726///   ::= 'avr_intrcc'
1727///   ::= 'avr_signalcc'
1728///   ::= 'ptx_kernel'
1729///   ::= 'ptx_device'
1730///   ::= 'spir_func'
1731///   ::= 'spir_kernel'
1732///   ::= 'x86_64_sysvcc'
1733///   ::= 'win64cc'
1734///   ::= 'webkit_jscc'
1735///   ::= 'anyregcc'
1736///   ::= 'preserve_mostcc'
1737///   ::= 'preserve_allcc'
1738///   ::= 'ghccc'
1739///   ::= 'swiftcc'
1740///   ::= 'x86_intrcc'
1741///   ::= 'hhvmcc'
1742///   ::= 'hhvm_ccc'
1743///   ::= 'cxx_fast_tlscc'
1744///   ::= 'amdgpu_vs'
1745///   ::= 'amdgpu_ls'
1746///   ::= 'amdgpu_hs'
1747///   ::= 'amdgpu_es'
1748///   ::= 'amdgpu_gs'
1749///   ::= 'amdgpu_ps'
1750///   ::= 'amdgpu_cs'
1751///   ::= 'amdgpu_kernel'
1752///   ::= 'cc' UINT
1753///
1754bool LLParser::ParseOptionalCallingConv(unsigned &CC) {
switch (Lex.getKind()) {
default:                       CC = CallingConv::C; return false;
case lltok::kw_ccc:            CC = CallingConv::C; break;
case lltok::kw_fastcc:         CC = CallingConv::Fast; break;
case lltok::kw_coldcc:         CC = CallingConv::Cold; break;
case lltok::kw_x86_stdcallcc:  CC = CallingConv::X86_StdCall; break;
case lltok::kw_x86_fastcallcc: CC = CallingConv::X86_FastCall; break;
case lltok::kw_x86_regcallcc:  CC = CallingConv::X86_RegCall; break;
case lltok::kw_x86_thiscallcc: CC = CallingConv::X86_ThisCall; break;
case lltok::kw_x86_vectorcallcc:CC = CallingConv::X86_VectorCall; break;
case lltok::kw_arm_apcscc:     CC = CallingConv::ARM_APCS; break;
case lltok::kw_arm_aapcscc:    CC = CallingConv::ARM_AAPCS; break;
case lltok::kw_arm_aapcs_vfpcc:CC = CallingConv::ARM_AAPCS_VFP; break;
case lltok::kw_msp430_intrcc:  CC = CallingConv::MSP430_INTR; break;
case lltok::kw_avr_intrcc:     CC = CallingConv::AVR_INTR; break;
case lltok::kw_avr_signalcc:   CC = CallingConv::AVR_SIGNAL; break;
case lltok::kw_ptx_kernel:     CC = CallingConv::PTX_Kernel; break;
case lltok::kw_ptx_device:     CC = CallingConv::PTX_Device; break;
case lltok::kw_spir_kernel:    CC = CallingConv::SPIR_KERNEL; break;
case lltok::kw_spir_func:      CC = CallingConv::SPIR_FUNC; break;
case lltok::kw_intel_ocl_bicc: CC = CallingConv::Intel_OCL_BI; break;
case lltok::kw_x86_64_sysvcc:  CC = CallingConv::X86_64_SysV; break;
case lltok::kw_win64cc:        CC = CallingConv::Win64; break;
case lltok::kw_webkit_jscc:    CC = CallingConv::WebKit_JS; break;
case lltok::kw_anyregcc:       CC = CallingConv::AnyReg; break;
case lltok::kw_preserve_mostcc:CC = CallingConv::PreserveMost; break;
case lltok::kw_preserve_allcc: CC = CallingConv::PreserveAll; break;
case lltok::kw_ghccc:          CC = CallingConv::GHC; break;
case lltok::kw_swiftcc:        CC = CallingConv::Swift; break;
case lltok::kw_x86_intrcc:     CC = CallingConv::X86_INTR; break;
case lltok::kw_hhvmcc:         CC = CallingConv::HHVM; break;
case lltok::kw_hhvm_ccc:       CC = CallingConv::HHVM_C; break;
case lltok::kw_cxx_fast_tlscc: CC = CallingConv::CXX_FAST_TLS; break;
case lltok::kw_amdgpu_vs:      CC = CallingConv::AMDGPU_VS; break;
case lltok::kw_amdgpu_ls:      CC = CallingConv::AMDGPU_LS; break;
case lltok::kw_amdgpu_hs:      CC = CallingConv::AMDGPU_HS; break;
case lltok::kw_amdgpu_es:      CC = CallingConv::AMDGPU_ES; break;
case lltok::kw_amdgpu_gs:      CC = CallingConv::AMDGPU_GS; break;
case lltok::kw_amdgpu_ps:      CC = CallingConv::AMDGPU_PS; break;
case lltok::kw_amdgpu_cs:      CC = CallingConv::AMDGPU_CS; break;
case lltok::kw_amdgpu_kernel:  CC = CallingConv::AMDGPU_KERNEL; break;
case lltok::kw_cc: {
    Lex.Lex();
    return ParseUInt32(CC);
  }
}

Lex.Lex();
return false;
1804}

1806/// ParseMetadataAttachment
1807///   ::= !dbg !42
1808bool LLParser::ParseMetadataAttachment(unsigned &Kind, MDNode *&MD) {
assert(Lex.getKind() == lltok::MetadataVar && "Expected metadata attachment")(static_cast <bool> (Lex.getKind() == lltok::MetadataVar
 && "Expected metadata attachment") ? void (0) : __assert_fail
 ("Lex.getKind() == lltok::MetadataVar && \"Expected metadata attachment\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 1809, __extension__ __PRETTY_FUNCTION__));

std::string Name = Lex.getStrVal();
Kind = M->getMDKindID(Name);
Lex.Lex();

return ParseMDNode(MD);
1816}

1818/// ParseInstructionMetadata
1819///   ::= !dbg !42 (',' !dbg !57)*
1820bool LLParser::ParseInstructionMetadata(Instruction &Inst) {
do {
  if (Lex.getKind() != lltok::MetadataVar)
    return TokError("expected metadata after comma");

  unsigned MDK;
  MDNode *N;
  if (ParseMetadataAttachment(MDK, N))
    return true;

  Inst.setMetadata(MDK, N);
  if (MDK == LLVMContext::MD_tbaa)
    InstsWithTBAATag.push_back(&Inst);

  // If this is the end of the list, we're done.
} while (EatIfPresent(lltok::comma));
return false;
1837}

1839/// ParseGlobalObjectMetadataAttachment
1840///   ::= !dbg !57
1841bool LLParser::ParseGlobalObjectMetadataAttachment(GlobalObject &GO) {
unsigned MDK;
MDNode *N;
if (ParseMetadataAttachment(MDK, N))
  return true;

GO.addMetadata(MDK, *N);
return false;
1849}

1851/// ParseOptionalFunctionMetadata
1852///   ::= (!dbg !57)*
1853bool LLParser::ParseOptionalFunctionMetadata(Function &F) {
while (Lex.getKind() == lltok::MetadataVar)
  if (ParseGlobalObjectMetadataAttachment(F))
    return true;
return false;
1858}

1860/// ParseOptionalAlignment
1861///   ::= /* empty */
1862///   ::= 'align' 4
1863bool LLParser::ParseOptionalAlignment(unsigned &Alignment) {
Alignment = 0;
if (!EatIfPresent(lltok::kw_align))
  return false;
LocTy AlignLoc = Lex.getLoc();
if (ParseUInt32(Alignment)) return true;
if (!isPowerOf2_32(Alignment))
  return Error(AlignLoc, "alignment is not a power of two");
if (Alignment > Value::MaximumAlignment)
  return Error(AlignLoc, "huge alignments are not supported yet");
return false;
1874}

1876/// ParseOptionalDerefAttrBytes
1877///   ::= /* empty */
1878///   ::= AttrKind '(' 4 ')'
1879///
1880/// where AttrKind is either 'dereferenceable' or 'dereferenceable_or_null'.
1881bool LLParser::ParseOptionalDerefAttrBytes(lltok::Kind AttrKind,
                                         uint64_t &Bytes) {
assert((AttrKind == lltok::kw_dereferenceable ||(static_cast <bool> ((AttrKind == lltok::kw_dereferenceable
 || AttrKind == lltok::kw_dereferenceable_or_null) &&
 "contract!") ? void (0) : __assert_fail ("(AttrKind == lltok::kw_dereferenceable || AttrKind == lltok::kw_dereferenceable_or_null) && \"contract!\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 1885, __extension__ __PRETTY_FUNCTION__))
        AttrKind == lltok::kw_dereferenceable_or_null) &&(static_cast <bool> ((AttrKind == lltok::kw_dereferenceable
 || AttrKind == lltok::kw_dereferenceable_or_null) &&
 "contract!") ? void (0) : __assert_fail ("(AttrKind == lltok::kw_dereferenceable || AttrKind == lltok::kw_dereferenceable_or_null) && \"contract!\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 1885, __extension__ __PRETTY_FUNCTION__))
       "contract!")(static_cast <bool> ((AttrKind == lltok::kw_dereferenceable
 || AttrKind == lltok::kw_dereferenceable_or_null) &&
 "contract!") ? void (0) : __assert_fail ("(AttrKind == lltok::kw_dereferenceable || AttrKind == lltok::kw_dereferenceable_or_null) && \"contract!\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 1885, __extension__ __PRETTY_FUNCTION__));

Bytes = 0;
if (!EatIfPresent(AttrKind))
  return false;
LocTy ParenLoc = Lex.getLoc();
if (!EatIfPresent(lltok::lparen))
  return Error(ParenLoc, "expected '('");
LocTy DerefLoc = Lex.getLoc();
if (ParseUInt64(Bytes)) return true;
ParenLoc = Lex.getLoc();
if (!EatIfPresent(lltok::rparen))
  return Error(ParenLoc, "expected ')'");
if (!Bytes)
  return Error(DerefLoc, "dereferenceable bytes must be non-zero");
return false;
1901}

1903/// ParseOptionalCommaAlign
1904///   ::=
1905///   ::= ',' align 4
1906///
1907/// This returns with AteExtraComma set to true if it ate an excess comma at the
1908/// end.
1909bool LLParser::ParseOptionalCommaAlign(unsigned &Alignment,
                                     bool &AteExtraComma) {
AteExtraComma = false;
while (EatIfPresent(lltok::comma)) {
  // Metadata at the end is an early exit.
  if (Lex.getKind() == lltok::MetadataVar) {
    AteExtraComma = true;
    return false;
  }

  if (Lex.getKind() != lltok::kw_align)
    return Error(Lex.getLoc(), "expected metadata or 'align'");

  if (ParseOptionalAlignment(Alignment)) return true;
}

return false;
1926}

1928/// ParseOptionalCommaAddrSpace
1929///   ::=
1930///   ::= ',' addrspace(1)
1931///
1932/// This returns with AteExtraComma set to true if it ate an excess comma at the
1933/// end.
1934bool LLParser::ParseOptionalCommaAddrSpace(unsigned &AddrSpace,
                                         LocTy &Loc,
                                         bool &AteExtraComma) {
AteExtraComma = false;
while (EatIfPresent(lltok::comma)) {
  // Metadata at the end is an early exit.
  if (Lex.getKind() == lltok::MetadataVar) {
    AteExtraComma = true;
    return false;
  }

  Loc = Lex.getLoc();
  if (Lex.getKind() != lltok::kw_addrspace)
    return Error(Lex.getLoc(), "expected metadata or 'addrspace'");

  if (ParseOptionalAddrSpace(AddrSpace))
    return true;
}

return false;
1954}

1956bool LLParser::parseAllocSizeArguments(unsigned &BaseSizeArg,
                                     Optional<unsigned> &HowManyArg) {
Lex.Lex();
26
←
Calling 'LLLexer::Lex'→
27
←
Returning from 'LLLexer::Lex'→

auto StartParen = Lex.getLoc();
28
←
Calling 'LLLexer::getLoc'→
33
←
Returning from 'LLLexer::getLoc'→
if (!EatIfPresent(lltok::lparen))
34
←
Calling 'LLParser::EatIfPresent'→
41
←
Returning from 'LLParser::EatIfPresent'→
42
←
Taking false branch→
  return Error(StartParen, "expected '('");

if (ParseUInt32(BaseSizeArg))
43
←
Calling 'LLParser::ParseUInt32'→
66
←
Returning from 'LLParser::ParseUInt32'→
67
←
Assuming the condition is false→
68
←
Taking false branch→
  return true;

if (EatIfPresent(lltok::comma)) {
69
←
Calling 'LLParser::EatIfPresent'→
76
←
Returning from 'LLParser::EatIfPresent'→
77
←
Taking true branch→
  auto HowManyAt = Lex.getLoc();
78
←
Calling 'LLLexer::getLoc'→
83
←
Returning from 'LLLexer::getLoc'→
  unsigned HowMany;
  if (ParseUInt32(HowMany))
84
←
Calling 'LLParser::ParseUInt32'→
103
←
Returning from 'LLParser::ParseUInt32'→
104
←
Taking false branch→
    return true;
  if (HowMany == BaseSizeArg)
105
←
The right operand of '==' is a garbage value
    return Error(HowManyAt,
                 "'allocsize' indices can't refer to the same parameter");
  HowManyArg = HowMany;
} else
  HowManyArg = None;

auto EndParen = Lex.getLoc();
if (!EatIfPresent(lltok::rparen))
  return Error(EndParen, "expected ')'");
return false;
1983}

1985/// ParseScopeAndOrdering
1986///   if isAtomic: ::= SyncScope? AtomicOrdering
1987///   else: ::=
1988///
1989/// This sets Scope and Ordering to the parsed values.
1990bool LLParser::ParseScopeAndOrdering(bool isAtomic, SyncScope::ID &SSID,
                                   AtomicOrdering &Ordering) {
if (!isAtomic)
  return false;

return ParseScope(SSID) || ParseOrdering(Ordering);
1996}

1998/// ParseScope
1999///   ::= syncscope("singlethread" | "<target scope>")?
2000///
2001/// This sets synchronization scope ID to the ID of the parsed value.
2002bool LLParser::ParseScope(SyncScope::ID &SSID) {
SSID = SyncScope::System;
if (EatIfPresent(lltok::kw_syncscope)) {
  auto StartParenAt = Lex.getLoc();
  if (!EatIfPresent(lltok::lparen))
    return Error(StartParenAt, "Expected '(' in syncscope");

  std::string SSN;
  auto SSNAt = Lex.getLoc();
  if (ParseStringConstant(SSN))
    return Error(SSNAt, "Expected synchronization scope name");

  auto EndParenAt = Lex.getLoc();
  if (!EatIfPresent(lltok::rparen))
    return Error(EndParenAt, "Expected ')' in syncscope");

  SSID = Context.getOrInsertSyncScopeID(SSN);
}

return false;
2022}

2024/// ParseOrdering
2025///   ::= AtomicOrdering
2026///
2027/// This sets Ordering to the parsed value.
2028bool LLParser::ParseOrdering(AtomicOrdering &Ordering) {
switch (Lex.getKind()) {
default: return TokError("Expected ordering on atomic instruction");
case lltok::kw_unordered: Ordering = AtomicOrdering::Unordered; break;
case lltok::kw_monotonic: Ordering = AtomicOrdering::Monotonic; break;
// Not specified yet:
// case lltok::kw_consume: Ordering = AtomicOrdering::Consume; break;
case lltok::kw_acquire: Ordering = AtomicOrdering::Acquire; break;
case lltok::kw_release: Ordering = AtomicOrdering::Release; break;
case lltok::kw_acq_rel: Ordering = AtomicOrdering::AcquireRelease; break;
case lltok::kw_seq_cst:
  Ordering = AtomicOrdering::SequentiallyConsistent;
  break;
}
Lex.Lex();
return false;
2044}

2046/// ParseOptionalStackAlignment
2047///   ::= /* empty */
2048///   ::= 'alignstack' '(' 4 ')'
2049bool LLParser::ParseOptionalStackAlignment(unsigned &Alignment) {
Alignment = 0;
if (!EatIfPresent(lltok::kw_alignstack))
  return false;
LocTy ParenLoc = Lex.getLoc();
if (!EatIfPresent(lltok::lparen))
  return Error(ParenLoc, "expected '('");
LocTy AlignLoc = Lex.getLoc();
if (ParseUInt32(Alignment)) return true;
ParenLoc = Lex.getLoc();
if (!EatIfPresent(lltok::rparen))
  return Error(ParenLoc, "expected ')'");
if (!isPowerOf2_32(Alignment))
  return Error(AlignLoc, "stack alignment is not a power of two");
return false;
2064}

2066/// ParseIndexList - This parses the index list for an insert/extractvalue
2067/// instruction.  This sets AteExtraComma in the case where we eat an extra
2068/// comma at the end of the line and find that it is followed by metadata.
2069/// Clients that don't allow metadata can call the version of this function that
2070/// only takes one argument.
2071///
2072/// ParseIndexList
2073///    ::=  (',' uint32)+
2074///
2075bool LLParser::ParseIndexList(SmallVectorImpl<unsigned> &Indices,
                            bool &AteExtraComma) {
AteExtraComma = false;

if (Lex.getKind() != lltok::comma)
  return TokError("expected ',' as start of index list");

while (EatIfPresent(lltok::comma)) {
  if (Lex.getKind() == lltok::MetadataVar) {
    if (Indices.empty()) return TokError("expected index");
    AteExtraComma = true;
    return false;
  }
  unsigned Idx = 0;
  if (ParseUInt32(Idx)) return true;
  Indices.push_back(Idx);
}

return false;
2094}

2096//===----------------------------------------------------------------------===//
2097// Type Parsing.
2098//===----------------------------------------------------------------------===//

2100/// ParseType - Parse a type.
2101bool LLParser::ParseType(Type *&Result, const Twine &Msg, bool AllowVoid) {
SMLoc TypeLoc = Lex.getLoc();
switch (Lex.getKind()) {
default:
  return TokError(Msg);
case lltok::Type:
  // Type ::= 'float' | 'void' (etc)
  Result = Lex.getTyVal();
  Lex.Lex();
  break;
case lltok::lbrace:
  // Type ::= StructType
  if (ParseAnonStructType(Result, false))
    return true;
  break;
case lltok::lsquare:
  // Type ::= '[' ... ']'
  Lex.Lex(); // eat the lsquare.
  if (ParseArrayVectorType(Result, false))
    return true;
  break;
case lltok::less: // Either vector or packed struct.
  // Type ::= '<' ... '>'
  Lex.Lex();
  if (Lex.getKind() == lltok::lbrace) {
    if (ParseAnonStructType(Result, true) ||
        ParseToken(lltok::greater, "expected '>' at end of packed struct"))
      return true;
  } else if (ParseArrayVectorType(Result, true))
    return true;
  break;
case lltok::LocalVar: {
  // Type ::= %foo
  std::pair<Type*, LocTy> &Entry = NamedTypes[Lex.getStrVal()];

  // If the type hasn't been defined yet, create a forward definition and
  // remember where that forward def'n was seen (in case it never is defined).
  if (!Entry.first) {
    Entry.first = StructType::create(Context, Lex.getStrVal());
    Entry.second = Lex.getLoc();
  }
  Result = Entry.first;
  Lex.Lex();
  break;
}

case lltok::LocalVarID: {
  // Type ::= %4
  std::pair<Type*, LocTy> &Entry = NumberedTypes[Lex.getUIntVal()];

  // If the type hasn't been defined yet, create a forward definition and
  // remember where that forward def'n was seen (in case it never is defined).
  if (!Entry.first) {
    Entry.first = StructType::create(Context);
    Entry.second = Lex.getLoc();
  }
  Result = Entry.first;
  Lex.Lex();
  break;
}
}

// Parse the type suffixes.
while (true) {
  switch (Lex.getKind()) {
  // End of type.
  default:
    if (!AllowVoid && Result->isVoidTy())
      return Error(TypeLoc, "void type only allowed for function results");
    return false;

  // Type ::= Type '*'
  case lltok::star:
    if (Result->isLabelTy())
      return TokError("basic block pointers are invalid");
    if (Result->isVoidTy())
      return TokError("pointers to void are invalid - use i8* instead");
    if (!PointerType::isValidElementType(Result))
      return TokError("pointer to this type is invalid");
    Result = PointerType::getUnqual(Result);
    Lex.Lex();
    break;

  // Type ::= Type 'addrspace' '(' uint32 ')' '*'
  case lltok::kw_addrspace: {
    if (Result->isLabelTy())
      return TokError("basic block pointers are invalid");
    if (Result->isVoidTy())
      return TokError("pointers to void are invalid; use i8* instead");
    if (!PointerType::isValidElementType(Result))
      return TokError("pointer to this type is invalid");
    unsigned AddrSpace;
    if (ParseOptionalAddrSpace(AddrSpace) ||
        ParseToken(lltok::star, "expected '*' in address space"))
      return true;

    Result = PointerType::get(Result, AddrSpace);
    break;
  }

  /// Types '(' ArgTypeListI ')' OptFuncAttrs
  case lltok::lparen:
    if (ParseFunctionType(Result))
      return true;
    break;
  }
}
2208}

2210/// ParseParameterList
2211///    ::= '(' ')'
2212///    ::= '(' Arg (',' Arg)* ')'
2213///  Arg
2214///    ::= Type OptionalAttributes Value OptionalAttributes
2215bool LLParser::ParseParameterList(SmallVectorImpl<ParamInfo> &ArgList,
                                PerFunctionState &PFS, bool IsMustTailCall,
                                bool InVarArgsFunc) {
if (ParseToken(lltok::lparen, "expected '(' in call"))
  return true;

while (Lex.getKind() != lltok::rparen) {
  // If this isn't the first argument, we need a comma.
  if (!ArgList.empty() &&
      ParseToken(lltok::comma, "expected ',' in argument list"))
    return true;

  // Parse an ellipsis if this is a musttail call in a variadic function.
  if (Lex.getKind() == lltok::dotdotdot) {
    const char *Msg = "unexpected ellipsis in argument list for ";
    if (!IsMustTailCall)
      return TokError(Twine(Msg) + "non-musttail call");
    if (!InVarArgsFunc)
      return TokError(Twine(Msg) + "musttail call in non-varargs function");
    Lex.Lex();  // Lex the '...', it is purely for readability.
    return ParseToken(lltok::rparen, "expected ')' at end of argument list");
  }

  // Parse the argument.
  LocTy ArgLoc;
  Type *ArgTy = nullptr;
  AttrBuilder ArgAttrs;
  Value *V;
  if (ParseType(ArgTy, ArgLoc))
    return true;

  if (ArgTy->isMetadataTy()) {
    if (ParseMetadataAsValue(V, PFS))
      return true;
  } else {
    // Otherwise, handle normal operands.
    if (ParseOptionalParamAttrs(ArgAttrs) || ParseValue(ArgTy, V, PFS))
      return true;
  }
  ArgList.push_back(ParamInfo(
      ArgLoc, V, AttributeSet::get(V->getContext(), ArgAttrs)));
}

if (IsMustTailCall && InVarArgsFunc)
  return TokError("expected '...' at end of argument list for musttail call "
                  "in varargs function");

Lex.Lex();  // Lex the ')'.
return false;
2264}

2266/// ParseOptionalOperandBundles
2267///    ::= /*empty*/
2268///    ::= '[' OperandBundle [, OperandBundle ]* ']'
2269///
2270/// OperandBundle
2271///    ::= bundle-tag '(' ')'
2272///    ::= bundle-tag '(' Type Value [, Type Value ]* ')'
2273///
2274/// bundle-tag ::= String Constant
2275bool LLParser::ParseOptionalOperandBundles(
  SmallVectorImpl<OperandBundleDef> &BundleList, PerFunctionState &PFS) {
LocTy BeginLoc = Lex.getLoc();
if (!EatIfPresent(lltok::lsquare))
  return false;

while (Lex.getKind() != lltok::rsquare) {
  // If this isn't the first operand bundle, we need a comma.
  if (!BundleList.empty() &&
      ParseToken(lltok::comma, "expected ',' in input list"))
    return true;

  std::string Tag;
  if (ParseStringConstant(Tag))
    return true;

  if (ParseToken(lltok::lparen, "expected '(' in operand bundle"))
    return true;

  std::vector<Value *> Inputs;
  while (Lex.getKind() != lltok::rparen) {
    // If this isn't the first input, we need a comma.
    if (!Inputs.empty() &&
        ParseToken(lltok::comma, "expected ',' in input list"))
      return true;

    Type *Ty = nullptr;
    Value *Input = nullptr;
    if (ParseType(Ty) || ParseValue(Ty, Input, PFS))
      return true;
    Inputs.push_back(Input);
  }

  BundleList.emplace_back(std::move(Tag), std::move(Inputs));

  Lex.Lex(); // Lex the ')'.
}

if (BundleList.empty())
  return Error(BeginLoc, "operand bundle set must not be empty");

Lex.Lex(); // Lex the ']'.
return false;
2318}

2320/// ParseArgumentList - Parse the argument list for a function type or function
2321/// prototype.
2322///   ::= '(' ArgTypeListI ')'
2323/// ArgTypeListI
2324///   ::= /*empty*/
2325///   ::= '...'
2326///   ::= ArgTypeList ',' '...'
2327///   ::= ArgType (',' ArgType)*
2328///
2329bool LLParser::ParseArgumentList(SmallVectorImpl<ArgInfo> &ArgList,
                               bool &isVarArg){
isVarArg = false;
assert(Lex.getKind() == lltok::lparen)(static_cast <bool> (Lex.getKind() == lltok::lparen) ? void
 (0) : __assert_fail ("Lex.getKind() == lltok::lparen", "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 2332, __extension__ __PRETTY_FUNCTION__));
Lex.Lex(); // eat the (.

if (Lex.getKind() == lltok::rparen) {
  // empty
} else if (Lex.getKind() == lltok::dotdotdot) {
  isVarArg = true;
  Lex.Lex();
} else {
  LocTy TypeLoc = Lex.getLoc();
  Type *ArgTy = nullptr;
  AttrBuilder Attrs;
  std::string Name;

  if (ParseType(ArgTy) ||
      ParseOptionalParamAttrs(Attrs)) return true;

  if (ArgTy->isVoidTy())
    return Error(TypeLoc, "argument can not have void type");

  if (Lex.getKind() == lltok::LocalVar) {
    Name = Lex.getStrVal();
    Lex.Lex();
  }

  if (!FunctionType::isValidArgumentType(ArgTy))
    return Error(TypeLoc, "invalid type for function argument");

  ArgList.emplace_back(TypeLoc, ArgTy,
                       AttributeSet::get(ArgTy->getContext(), Attrs),
                       std::move(Name));

  while (EatIfPresent(lltok::comma)) {
    // Handle ... at end of arg list.
    if (EatIfPresent(lltok::dotdotdot)) {
      isVarArg = true;
      break;
    }

    // Otherwise must be an argument type.
    TypeLoc = Lex.getLoc();
    if (ParseType(ArgTy) || ParseOptionalParamAttrs(Attrs)) return true;

    if (ArgTy->isVoidTy())
      return Error(TypeLoc, "argument can not have void type");

    if (Lex.getKind() == lltok::LocalVar) {
      Name = Lex.getStrVal();
      Lex.Lex();
    } else {
      Name = "";
    }

    if (!ArgTy->isFirstClassType())
      return Error(TypeLoc, "invalid type for function argument");

    ArgList.emplace_back(TypeLoc, ArgTy,
                         AttributeSet::get(ArgTy->getContext(), Attrs),
                         std::move(Name));
  }
}

return ParseToken(lltok::rparen, "expected ')' at end of argument list");
2395}

2397/// ParseFunctionType
2398///  ::= Type ArgumentList OptionalAttrs
2399bool LLParser::ParseFunctionType(Type *&Result) {
assert(Lex.getKind() == lltok::lparen)(static_cast <bool> (Lex.getKind() == lltok::lparen) ? void
 (0) : __assert_fail ("Lex.getKind() == lltok::lparen", "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 2400, __extension__ __PRETTY_FUNCTION__));

if (!FunctionType::isValidReturnType(Result))
  return TokError("invalid function return type");

SmallVector<ArgInfo, 8> ArgList;
bool isVarArg;
if (ParseArgumentList(ArgList, isVarArg))
  return true;

// Reject names on the arguments lists.
for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
  if (!ArgList[i].Name.empty())
    return Error(ArgList[i].Loc, "argument name invalid in function type");
  if (ArgList[i].Attrs.hasAttributes())
    return Error(ArgList[i].Loc,
                 "argument attributes invalid in function type");
}

SmallVector<Type*, 16> ArgListTy;
for (unsigned i = 0, e = ArgList.size(); i != e; ++i)
  ArgListTy.push_back(ArgList[i].Ty);

Result = FunctionType::get(Result, ArgListTy, isVarArg);
return false;
2425}

2427/// ParseAnonStructType - Parse an anonymous struct type, which is inlined into
2428/// other structs.
2429bool LLParser::ParseAnonStructType(Type *&Result, bool Packed) {
SmallVector<Type*, 8> Elts;
if (ParseStructBody(Elts)) return true;

Result = StructType::get(Context, Elts, Packed);
return false;
2435}

2437/// ParseStructDefinition - Parse a struct in a 'type' definition.
2438bool LLParser::ParseStructDefinition(SMLoc TypeLoc, StringRef Name,
                                   std::pair<Type*, LocTy> &Entry,
                                   Type *&ResultTy) {
// If the type was already defined, diagnose the redefinition.
if (Entry.first && !Entry.second.isValid())
  return Error(TypeLoc, "redefinition of type");

// If we have opaque, just return without filling in the definition for the
// struct.  This counts as a definition as far as the .ll file goes.
if (EatIfPresent(lltok::kw_opaque)) {
  // This type is being defined, so clear the location to indicate this.
  Entry.second = SMLoc();

  // If this type number has never been uttered, create it.
  if (!Entry.first)
    Entry.first = StructType::create(Context, Name);
  ResultTy = Entry.first;
  return false;
}

// If the type starts with '<', then it is either a packed struct or a vector.
bool isPacked = EatIfPresent(lltok::less);

// If we don't have a struct, then we have a random type alias, which we
// accept for compatibility with old files.  These types are not allowed to be
// forward referenced and not allowed to be recursive.
if (Lex.getKind() != lltok::lbrace) {
  if (Entry.first)
    return Error(TypeLoc, "forward references to non-struct type");

  ResultTy = nullptr;
  if (isPacked)
    return ParseArrayVectorType(ResultTy, true);
  return ParseType(ResultTy);
}

// This type is being defined, so clear the location to indicate this.
Entry.second = SMLoc();

// If this type number has never been uttered, create it.
if (!Entry.first)
  Entry.first = StructType::create(Context, Name);

StructType *STy = cast<StructType>(Entry.first);

SmallVector<Type*, 8> Body;
if (ParseStructBody(Body) ||
    (isPacked && ParseToken(lltok::greater, "expected '>' in packed struct")))
  return true;

STy->setBody(Body, isPacked);
ResultTy = STy;
return false;
2491}

2493/// ParseStructType: Handles packed and unpacked types.  </> parsed elsewhere.
2494///   StructType
2495///     ::= '{' '}'
2496///     ::= '{' Type (',' Type)* '}'
2497///     ::= '<' '{' '}' '>'
2498///     ::= '<' '{' Type (',' Type)* '}' '>'
2499bool LLParser::ParseStructBody(SmallVectorImpl<Type*> &Body) {
assert(Lex.getKind() == lltok::lbrace)(static_cast <bool> (Lex.getKind() == lltok::lbrace) ? void
 (0) : __assert_fail ("Lex.getKind() == lltok::lbrace", "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 2500, __extension__ __PRETTY_FUNCTION__));
Lex.Lex(); // Consume the '{'

// Handle the empty struct.
if (EatIfPresent(lltok::rbrace))
  return false;

LocTy EltTyLoc = Lex.getLoc();
Type *Ty = nullptr;
if (ParseType(Ty)) return true;
Body.push_back(Ty);

if (!StructType::isValidElementType(Ty))
  return Error(EltTyLoc, "invalid element type for struct");

while (EatIfPresent(lltok::comma)) {
  EltTyLoc = Lex.getLoc();
  if (ParseType(Ty)) return true;

  if (!StructType::isValidElementType(Ty))
    return Error(EltTyLoc, "invalid element type for struct");

  Body.push_back(Ty);
}

return ParseToken(lltok::rbrace, "expected '}' at end of struct");
2526}

2528/// ParseArrayVectorType - Parse an array or vector type, assuming the first
2529/// token has already been consumed.
2530///   Type
2531///     ::= '[' APSINTVAL 'x' Types ']'
2532///     ::= '<' APSINTVAL 'x' Types '>'
2533bool LLParser::ParseArrayVectorType(Type *&Result, bool isVector) {
if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned() ||
    Lex.getAPSIntVal().getBitWidth() > 64)
  return TokError("expected number in address space");

LocTy SizeLoc = Lex.getLoc();
uint64_t Size = Lex.getAPSIntVal().getZExtValue();
Lex.Lex();

if (ParseToken(lltok::kw_x, "expected 'x' after element count"))
    return true;

LocTy TypeLoc = Lex.getLoc();
Type *EltTy = nullptr;
if (ParseType(EltTy)) return true;

if (ParseToken(isVector ? lltok::greater : lltok::rsquare,
               "expected end of sequential type"))
  return true;

if (isVector) {
  if (Size == 0)
    return Error(SizeLoc, "zero element vector is illegal");
  if ((unsigned)Size != Size)
    return Error(SizeLoc, "size too large for vector");
  if (!VectorType::isValidElementType(EltTy))
    return Error(TypeLoc, "invalid vector element type");
  Result = VectorType::get(EltTy, unsigned(Size));
} else {
  if (!ArrayType::isValidElementType(EltTy))
    return Error(TypeLoc, "invalid array element type");
  Result = ArrayType::get(EltTy, Size);
}
return false;
2567}

2569//===----------------------------------------------------------------------===//
2570// Function Semantic Analysis.
2571//===----------------------------------------------------------------------===//

2573LLParser::PerFunctionState::PerFunctionState(LLParser &p, Function &f,
                                           int functionNumber)
: P(p), F(f), FunctionNumber(functionNumber) {

// Insert unnamed arguments into the NumberedVals list.
for (Argument &A : F.args())
  if (!A.hasName())
    NumberedVals.push_back(&A);
2581}

2583LLParser::PerFunctionState::~PerFunctionState() {
// If there were any forward referenced non-basicblock values, delete them.

for (const auto &P : ForwardRefVals) {
  if (isa<BasicBlock>(P.second.first))
    continue;
  P.second.first->replaceAllUsesWith(
      UndefValue::get(P.second.first->getType()));
  P.second.first->deleteValue();
}

for (const auto &P : ForwardRefValIDs) {
  if (isa<BasicBlock>(P.second.first))
    continue;
  P.second.first->replaceAllUsesWith(
      UndefValue::get(P.second.first->getType()));
  P.second.first->deleteValue();
}
2601}

2603bool LLParser::PerFunctionState::FinishFunction() {
if (!ForwardRefVals.empty())
  return P.Error(ForwardRefVals.begin()->second.second,
                 "use of undefined value '%" + ForwardRefVals.begin()->first +
                 "'");
if (!ForwardRefValIDs.empty())
  return P.Error(ForwardRefValIDs.begin()->second.second,
                 "use of undefined value '%" +
                 Twine(ForwardRefValIDs.begin()->first) + "'");
return false;
2613}

2615static bool isValidVariableType(Module *M, Type *Ty, Value *Val, bool IsCall) {
if (Val->getType() == Ty)
  return true;
// For calls we also accept variables in the program address space
if (IsCall && isa<PointerType>(Ty)) {
  Type *TyInProgAS = cast<PointerType>(Ty)->getElementType()->getPointerTo(
      M->getDataLayout().getProgramAddressSpace());
  if (Val->getType() == TyInProgAS)
    return true;
}
return false;
2626}

2628/// GetVal - Get a value with the specified name or ID, creating a
2629/// forward reference record if needed.  This can return null if the value
2630/// exists but does not have the right type.
2631Value *LLParser::PerFunctionState::GetVal(const std::string &Name, Type *Ty,
                                        LocTy Loc, bool IsCall) {
// Look this name up in the normal function symbol table.
Value *Val = F.getValueSymbolTable()->lookup(Name);

// If this is a forward reference for the value, see if we already created a
// forward ref record.
if (!Val) {
  auto I = ForwardRefVals.find(Name);
  if (I != ForwardRefVals.end())
    Val = I->second.first;
}

// If we have the value in the symbol table or fwd-ref table, return it.
if (Val) {
  if (isValidVariableType(P.M, Ty, Val, IsCall))
    return Val;
  if (Ty->isLabelTy())
    P.Error(Loc, "'%" + Name + "' is not a basic block");
  else
    P.Error(Loc, "'%" + Name + "' defined with type '" +
            getTypeString(Val->getType()) + "'");
  return nullptr;
}

// Don't make placeholders with invalid type.
if (!Ty->isFirstClassType()) {
  P.Error(Loc, "invalid use of a non-first-class type");
  return nullptr;
}

// Otherwise, create a new forward reference for this value and remember it.
Value *FwdVal;
if (Ty->isLabelTy()) {
  FwdVal = BasicBlock::Create(F.getContext(), Name, &F);
} else {
  FwdVal = new Argument(Ty, Name);
}

ForwardRefVals[Name] = std::make_pair(FwdVal, Loc);
return FwdVal;
2672}

2674Value *LLParser::PerFunctionState::GetVal(unsigned ID, Type *Ty, LocTy Loc,
                                        bool IsCall) {
// Look this name up in the normal function symbol table.
Value *Val = ID < NumberedVals.size() ? NumberedVals[ID] : nullptr;

// If this is a forward reference for the value, see if we already created a
// forward ref record.
if (!Val) {
  auto I = ForwardRefValIDs.find(ID);
  if (I != ForwardRefValIDs.end())
    Val = I->second.first;
}

// If we have the value in the symbol table or fwd-ref table, return it.
if (Val) {
  if (isValidVariableType(P.M, Ty, Val, IsCall))
    return Val;
  if (Ty->isLabelTy())
    P.Error(Loc, "'%" + Twine(ID) + "' is not a basic block");
  else
    P.Error(Loc, "'%" + Twine(ID) + "' defined with type '" +
            getTypeString(Val->getType()) + "'");
  return nullptr;
}

if (!Ty->isFirstClassType()) {
  P.Error(Loc, "invalid use of a non-first-class type");
  return nullptr;
}

// Otherwise, create a new forward reference for this value and remember it.
Value *FwdVal;
if (Ty->isLabelTy()) {
  FwdVal = BasicBlock::Create(F.getContext(), "", &F);
} else {
  FwdVal = new Argument(Ty);
}

ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc);
return FwdVal;
2714}

2716/// SetInstName - After an instruction is parsed and inserted into its
2717/// basic block, this installs its name.
2718bool LLParser::PerFunctionState::SetInstName(int NameID,
                                           const std::string &NameStr,
                                           LocTy NameLoc, Instruction *Inst) {
// If this instruction has void type, it cannot have a name or ID specified.
if (Inst->getType()->isVoidTy()) {
  if (NameID != -1 || !NameStr.empty())
    return P.Error(NameLoc, "instructions returning void cannot have a name");
  return false;
}

// If this was a numbered instruction, verify that the instruction is the
// expected value and resolve any forward references.
if (NameStr.empty()) {
  // If neither a name nor an ID was specified, just use the next ID.
  if (NameID == -1)
    NameID = NumberedVals.size();

  if (unsigned(NameID) != NumberedVals.size())
    return P.Error(NameLoc, "instruction expected to be numbered '%" +
                   Twine(NumberedVals.size()) + "'");

  auto FI = ForwardRefValIDs.find(NameID);
  if (FI != ForwardRefValIDs.end()) {
    Value *Sentinel = FI->second.first;
    if (Sentinel->getType() != Inst->getType())
      return P.Error(NameLoc, "instruction forward referenced with type '" +
                     getTypeString(FI->second.first->getType()) + "'");

    Sentinel->replaceAllUsesWith(Inst);
    Sentinel->deleteValue();
    ForwardRefValIDs.erase(FI);
  }

  NumberedVals.push_back(Inst);
  return false;
}

// Otherwise, the instruction had a name.  Resolve forward refs and set it.
auto FI = ForwardRefVals.find(NameStr);
if (FI != ForwardRefVals.end()) {
  Value *Sentinel = FI->second.first;
  if (Sentinel->getType() != Inst->getType())
    return P.Error(NameLoc, "instruction forward referenced with type '" +
                   getTypeString(FI->second.first->getType()) + "'");

  Sentinel->replaceAllUsesWith(Inst);
  Sentinel->deleteValue();
  ForwardRefVals.erase(FI);
}

// Set the name on the instruction.
Inst->setName(NameStr);

if (Inst->getName() != NameStr)
  return P.Error(NameLoc, "multiple definition of local value named '" +
                 NameStr + "'");
return false;
2775}

2777/// GetBB - Get a basic block with the specified name or ID, creating a
2778/// forward reference record if needed.
2779BasicBlock *LLParser::PerFunctionState::GetBB(const std::string &Name,
                                            LocTy Loc) {
return dyn_cast_or_null<BasicBlock>(
    GetVal(Name, Type::getLabelTy(F.getContext()), Loc, /*IsCall=*/false));
2783}

2785BasicBlock *LLParser::PerFunctionState::GetBB(unsigned ID, LocTy Loc) {
return dyn_cast_or_null<BasicBlock>(
    GetVal(ID, Type::getLabelTy(F.getContext()), Loc, /*IsCall=*/false));
2788}

2790/// DefineBB - Define the specified basic block, which is either named or
2791/// unnamed.  If there is an error, this returns null otherwise it returns
2792/// the block being defined.
2793BasicBlock *LLParser::PerFunctionState::DefineBB(const std::string &Name,
                                               LocTy Loc) {
BasicBlock *BB;
if (Name.empty())
  BB = GetBB(NumberedVals.size(), Loc);
else
  BB = GetBB(Name, Loc);
if (!BB) return nullptr; // Already diagnosed error.

// Move the block to the end of the function.  Forward ref'd blocks are
// inserted wherever they happen to be referenced.
F.getBasicBlockList().splice(F.end(), F.getBasicBlockList(), BB);

// Remove the block from forward ref sets.
if (Name.empty()) {
  ForwardRefValIDs.erase(NumberedVals.size());
  NumberedVals.push_back(BB);
} else {
  // BB forward references are already in the function symbol table.
  ForwardRefVals.erase(Name);
}

return BB;
2816}

2818//===----------------------------------------------------------------------===//
2819// Constants.
2820//===----------------------------------------------------------------------===//

2822/// ParseValID - Parse an abstract value that doesn't necessarily have a
2823/// type implied.  For example, if we parse "4" we don't know what integer type
2824/// it has.  The value will later be combined with its type and checked for
2825/// sanity.  PFS is used to convert function-local operands of metadata (since
2826/// metadata operands are not just parsed here but also converted to values).
2827/// PFS can be null when we are not parsing metadata values inside a function.
2828bool LLParser::ParseValID(ValID &ID, PerFunctionState *PFS) {
ID.Loc = Lex.getLoc();
switch (Lex.getKind()) {
default: return TokError("expected value token");
case lltok::GlobalID:  // @42
  ID.UIntVal = Lex.getUIntVal();
  ID.Kind = ValID::t_GlobalID;
  break;
case lltok::GlobalVar:  // @foo
  ID.StrVal = Lex.getStrVal();
  ID.Kind = ValID::t_GlobalName;
  break;
case lltok::LocalVarID:  // %42
  ID.UIntVal = Lex.getUIntVal();
  ID.Kind = ValID::t_LocalID;
  break;
case lltok::LocalVar:  // %foo
  ID.StrVal = Lex.getStrVal();
  ID.Kind = ValID::t_LocalName;
  break;
case lltok::APSInt:
  ID.APSIntVal = Lex.getAPSIntVal();
  ID.Kind = ValID::t_APSInt;
  break;
case lltok::APFloat:
  ID.APFloatVal = Lex.getAPFloatVal();
  ID.Kind = ValID::t_APFloat;
  break;
case lltok::kw_true:
  ID.ConstantVal = ConstantInt::getTrue(Context);
  ID.Kind = ValID::t_Constant;
  break;
case lltok::kw_false:
  ID.ConstantVal = ConstantInt::getFalse(Context);
  ID.Kind = ValID::t_Constant;
  break;
case lltok::kw_null: ID.Kind = ValID::t_Null; break;
case lltok::kw_undef: ID.Kind = ValID::t_Undef; break;
case lltok::kw_zeroinitializer: ID.Kind = ValID::t_Zero; break;
case lltok::kw_none: ID.Kind = ValID::t_None; break;

case lltok::lbrace: {
  // ValID ::= '{' ConstVector '}'
  Lex.Lex();
  SmallVector<Constant*, 16> Elts;
  if (ParseGlobalValueVector(Elts) ||
      ParseToken(lltok::rbrace, "expected end of struct constant"))
    return true;

  ID.ConstantStructElts = make_unique<Constant *[]>(Elts.size());
  ID.UIntVal = Elts.size();
  memcpy(ID.ConstantStructElts.get(), Elts.data(),
         Elts.size() * sizeof(Elts[0]));
  ID.Kind = ValID::t_ConstantStruct;
  return false;
}
case lltok::less: {
  // ValID ::= '<' ConstVector '>'         --> Vector.
  // ValID ::= '<' '{' ConstVector '}' '>' --> Packed Struct.
  Lex.Lex();
  bool isPackedStruct = EatIfPresent(lltok::lbrace);

  SmallVector<Constant*, 16> Elts;
  LocTy FirstEltLoc = Lex.getLoc();
  if (ParseGlobalValueVector(Elts) ||
      (isPackedStruct &&
       ParseToken(lltok::rbrace, "expected end of packed struct")) ||
      ParseToken(lltok::greater, "expected end of constant"))
    return true;

  if (isPackedStruct) {
    ID.ConstantStructElts = make_unique<Constant *[]>(Elts.size());
    memcpy(ID.ConstantStructElts.get(), Elts.data(),
           Elts.size() * sizeof(Elts[0]));
    ID.UIntVal = Elts.size();
    ID.Kind = ValID::t_PackedConstantStruct;
    return false;
  }

  if (Elts.empty())
    return Error(ID.Loc, "constant vector must not be empty");

  if (!Elts[0]->getType()->isIntegerTy() &&
      !Elts[0]->getType()->isFloatingPointTy() &&
      !Elts[0]->getType()->isPointerTy())
    return Error(FirstEltLoc,
          "vector elements must have integer, pointer or floating point type");

  // Verify that all the vector elements have the same type.
  for (unsigned i = 1, e = Elts.size(); i != e; ++i)
    if (Elts[i]->getType() != Elts[0]->getType())
      return Error(FirstEltLoc,
                   "vector element #" + Twine(i) +
                  " is not of type '" + getTypeString(Elts[0]->getType()));

  ID.ConstantVal = ConstantVector::get(Elts);
  ID.Kind = ValID::t_Constant;
  return false;
}
case lltok::lsquare: {   // Array Constant
  Lex.Lex();
  SmallVector<Constant*, 16> Elts;
  LocTy FirstEltLoc = Lex.getLoc();
  if (ParseGlobalValueVector(Elts) ||
      ParseToken(lltok::rsquare, "expected end of array constant"))
    return true;

  // Handle empty element.
  if (Elts.empty()) {
    // Use undef instead of an array because it's inconvenient to determine
    // the element type at this point, there being no elements to examine.
    ID.Kind = ValID::t_EmptyArray;
    return false;
  }

  if (!Elts[0]->getType()->isFirstClassType())
    return Error(FirstEltLoc, "invalid array element type: " +
                 getTypeString(Elts[0]->getType()));

  ArrayType *ATy = ArrayType::get(Elts[0]->getType(), Elts.size());

  // Verify all elements are correct type!
  for (unsigned i = 0, e = Elts.size(); i != e; ++i) {
    if (Elts[i]->getType() != Elts[0]->getType())
      return Error(FirstEltLoc,
                   "array element #" + Twine(i) +
                   " is not of type '" + getTypeString(Elts[0]->getType()));
  }

  ID.ConstantVal = ConstantArray::get(ATy, Elts);
  ID.Kind = ValID::t_Constant;
  return false;
}
case lltok::kw_c:  // c "foo"
  Lex.Lex();
  ID.ConstantVal = ConstantDataArray::getString(Context, Lex.getStrVal(),
                                                false);
  if (ParseToken(lltok::StringConstant, "expected string")) return true;
  ID.Kind = ValID::t_Constant;
  return false;

case lltok::kw_asm: {
  // ValID ::= 'asm' SideEffect? AlignStack? IntelDialect? STRINGCONSTANT ','
  //             STRINGCONSTANT
  bool HasSideEffect, AlignStack, AsmDialect;
  Lex.Lex();
  if (ParseOptionalToken(lltok::kw_sideeffect, HasSideEffect) ||
      ParseOptionalToken(lltok::kw_alignstack, AlignStack) ||
      ParseOptionalToken(lltok::kw_inteldialect, AsmDialect) ||
      ParseStringConstant(ID.StrVal) ||
      ParseToken(lltok::comma, "expected comma in inline asm expression") ||
      ParseToken(lltok::StringConstant, "expected constraint string"))
    return true;
  ID.StrVal2 = Lex.getStrVal();
  ID.UIntVal = unsigned(HasSideEffect) | (unsigned(AlignStack)<<1) |
    (unsigned(AsmDialect)<<2);
  ID.Kind = ValID::t_InlineAsm;
  return false;
}

case lltok::kw_blockaddress: {
  // ValID ::= 'blockaddress' '(' @foo ',' %bar ')'
  Lex.Lex();

  ValID Fn, Label;

  if (ParseToken(lltok::lparen, "expected '(' in block address expression") ||
      ParseValID(Fn) ||
      ParseToken(lltok::comma, "expected comma in block address expression")||
      ParseValID(Label) ||
      ParseToken(lltok::rparen, "expected ')' in block address expression"))
    return true;

  if (Fn.Kind != ValID::t_GlobalID && Fn.Kind != ValID::t_GlobalName)
    return Error(Fn.Loc, "expected function name in blockaddress");
  if (Label.Kind != ValID::t_LocalID && Label.Kind != ValID::t_LocalName)
    return Error(Label.Loc, "expected basic block name in blockaddress");

  // Try to find the function (but skip it if it's forward-referenced).
  GlobalValue *GV = nullptr;
  if (Fn.Kind == ValID::t_GlobalID) {
    if (Fn.UIntVal < NumberedVals.size())
      GV = NumberedVals[Fn.UIntVal];
  } else if (!ForwardRefVals.count(Fn.StrVal)) {
    GV = M->getNamedValue(Fn.StrVal);
  }
  Function *F = nullptr;
  if (GV) {
    // Confirm that it's actually a function with a definition.
    if (!isa<Function>(GV))
      return Error(Fn.Loc, "expected function name in blockaddress");
    F = cast<Function>(GV);
    if (F->isDeclaration())
      return Error(Fn.Loc, "cannot take blockaddress inside a declaration");
  }

  if (!F) {
    // Make a global variable as a placeholder for this reference.
    GlobalValue *&FwdRef =
        ForwardRefBlockAddresses.insert(std::make_pair(
                                            std::move(Fn),
                                            std::map<ValID, GlobalValue *>()))
            .first->second.insert(std::make_pair(std::move(Label), nullptr))
            .first->second;
    if (!FwdRef)
      FwdRef = new GlobalVariable(*M, Type::getInt8Ty(Context), false,
                                  GlobalValue::InternalLinkage, nullptr, "");
    ID.ConstantVal = FwdRef;
    ID.Kind = ValID::t_Constant;
    return false;
  }

  // We found the function; now find the basic block.  Don't use PFS, since we
  // might be inside a constant expression.
  BasicBlock *BB;
  if (BlockAddressPFS && F == &BlockAddressPFS->getFunction()) {
    if (Label.Kind == ValID::t_LocalID)
      BB = BlockAddressPFS->GetBB(Label.UIntVal, Label.Loc);
    else
      BB = BlockAddressPFS->GetBB(Label.StrVal, Label.Loc);
    if (!BB)
      return Error(Label.Loc, "referenced value is not a basic block");
  } else {
    if (Label.Kind == ValID::t_LocalID)
      return Error(Label.Loc, "cannot take address of numeric label after "
                              "the function is defined");
    BB = dyn_cast_or_null<BasicBlock>(
        F->getValueSymbolTable()->lookup(Label.StrVal));
    if (!BB)
      return Error(Label.Loc, "referenced value is not a basic block");
  }

  ID.ConstantVal = BlockAddress::get(F, BB);
  ID.Kind = ValID::t_Constant;
  return false;
}

case lltok::kw_trunc:
case lltok::kw_zext:
case lltok::kw_sext:
case lltok::kw_fptrunc:
case lltok::kw_fpext:
case lltok::kw_bitcast:
case lltok::kw_addrspacecast:
case lltok::kw_uitofp:
case lltok::kw_sitofp:
case lltok::kw_fptoui:
case lltok::kw_fptosi:
case lltok::kw_inttoptr:
case lltok::kw_ptrtoint: {
  unsigned Opc = Lex.getUIntVal();
  Type *DestTy = nullptr;
  Constant *SrcVal;
  Lex.Lex();
  if (ParseToken(lltok::lparen, "expected '(' after constantexpr cast") ||
      ParseGlobalTypeAndValue(SrcVal) ||
      ParseToken(lltok::kw_to, "expected 'to' in constantexpr cast") ||
      ParseType(DestTy) ||
      ParseToken(lltok::rparen, "expected ')' at end of constantexpr cast"))
    return true;
  if (!CastInst::castIsValid((Instruction::CastOps)Opc, SrcVal, DestTy))
    return Error(ID.Loc, "invalid cast opcode for cast from '" +
                 getTypeString(SrcVal->getType()) + "' to '" +
                 getTypeString(DestTy) + "'");
  ID.ConstantVal = ConstantExpr::getCast((Instruction::CastOps)Opc,
                                               SrcVal, DestTy);
  ID.Kind = ValID::t_Constant;
  return false;
}
case lltok::kw_extractvalue: {
  Lex.Lex();
  Constant *Val;
  SmallVector<unsigned, 4> Indices;
  if (ParseToken(lltok::lparen, "expected '(' in extractvalue constantexpr")||
      ParseGlobalTypeAndValue(Val) ||
      ParseIndexList(Indices) ||
      ParseToken(lltok::rparen, "expected ')' in extractvalue constantexpr"))
    return true;

  if (!Val->getType()->isAggregateType())
    return Error(ID.Loc, "extractvalue operand must be aggregate type");
  if (!ExtractValueInst::getIndexedType(Val->getType(), Indices))
    return Error(ID.Loc, "invalid indices for extractvalue");
  ID.ConstantVal = ConstantExpr::getExtractValue(Val, Indices);
  ID.Kind = ValID::t_Constant;
  return false;
}
case lltok::kw_insertvalue: {
  Lex.Lex();
  Constant *Val0, *Val1;
  SmallVector<unsigned, 4> Indices;
  if (ParseToken(lltok::lparen, "expected '(' in insertvalue constantexpr")||
      ParseGlobalTypeAndValue(Val0) ||
      ParseToken(lltok::comma, "expected comma in insertvalue constantexpr")||
      ParseGlobalTypeAndValue(Val1) ||
      ParseIndexList(Indices) ||
      ParseToken(lltok::rparen, "expected ')' in insertvalue constantexpr"))
    return true;
  if (!Val0->getType()->isAggregateType())
    return Error(ID.Loc, "insertvalue operand must be aggregate type");
  Type *IndexedType =
      ExtractValueInst::getIndexedType(Val0->getType(), Indices);
  if (!IndexedType)
    return Error(ID.Loc, "invalid indices for insertvalue");
  if (IndexedType != Val1->getType())
    return Error(ID.Loc, "insertvalue operand and field disagree in type: '" +
                             getTypeString(Val1->getType()) +
                             "' instead of '" + getTypeString(IndexedType) +
                             "'");
  ID.ConstantVal = ConstantExpr::getInsertValue(Val0, Val1, Indices);
  ID.Kind = ValID::t_Constant;
  return false;
}
case lltok::kw_icmp:
case lltok::kw_fcmp: {
  unsigned PredVal, Opc = Lex.getUIntVal();
  Constant *Val0, *Val1;
  Lex.Lex();
  if (ParseCmpPredicate(PredVal, Opc) ||
      ParseToken(lltok::lparen, "expected '(' in compare constantexpr") ||
      ParseGlobalTypeAndValue(Val0) ||
      ParseToken(lltok::comma, "expected comma in compare constantexpr") ||
      ParseGlobalTypeAndValue(Val1) ||
      ParseToken(lltok::rparen, "expected ')' in compare constantexpr"))
    return true;

  if (Val0->getType() != Val1->getType())
    return Error(ID.Loc, "compare operands must have the same type");

  CmpInst::Predicate Pred = (CmpInst::Predicate)PredVal;

  if (Opc == Instruction::FCmp) {
    if (!Val0->getType()->isFPOrFPVectorTy())
      return Error(ID.Loc, "fcmp requires floating point operands");
    ID.ConstantVal = ConstantExpr::getFCmp(Pred, Val0, Val1);
  } else {
    assert(Opc == Instruction::ICmp && "Unexpected opcode for CmpInst!")(static_cast <bool> (Opc == Instruction::ICmp &&
 "Unexpected opcode for CmpInst!") ? void (0) : __assert_fail
 ("Opc == Instruction::ICmp && \"Unexpected opcode for CmpInst!\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3164, __extension__ __PRETTY_FUNCTION__));
    if (!Val0->getType()->isIntOrIntVectorTy() &&
        !Val0->getType()->isPtrOrPtrVectorTy())
      return Error(ID.Loc, "icmp requires pointer or integer operands");
    ID.ConstantVal = ConstantExpr::getICmp(Pred, Val0, Val1);
  }
  ID.Kind = ValID::t_Constant;
  return false;
}

// Binary Operators.
case lltok::kw_add:
case lltok::kw_fadd:
case lltok::kw_sub:
case lltok::kw_fsub:
case lltok::kw_mul:
case lltok::kw_fmul:
case lltok::kw_udiv:
case lltok::kw_sdiv:
case lltok::kw_fdiv:
case lltok::kw_urem:
case lltok::kw_srem:
case lltok::kw_frem:
case lltok::kw_shl:
case lltok::kw_lshr:
case lltok::kw_ashr: {
  bool NUW = false;
  bool NSW = false;
  bool Exact = false;
  unsigned Opc = Lex.getUIntVal();
  Constant *Val0, *Val1;
  Lex.Lex();
  LocTy ModifierLoc = Lex.getLoc();
  if (Opc == Instruction::Add || Opc == Instruction::Sub ||
      Opc == Instruction::Mul || Opc == Instruction::Shl) {
    if (EatIfPresent(lltok::kw_nuw))
      NUW = true;
    if (EatIfPresent(lltok::kw_nsw)) {
      NSW = true;
      if (EatIfPresent(lltok::kw_nuw))
        NUW = true;
    }
  } else if (Opc == Instruction::SDiv || Opc == Instruction::UDiv ||
             Opc == Instruction::LShr || Opc == Instruction::AShr) {
    if (EatIfPresent(lltok::kw_exact))
      Exact = true;
  }
  if (ParseToken(lltok::lparen, "expected '(' in binary constantexpr") ||
      ParseGlobalTypeAndValue(Val0) ||
      ParseToken(lltok::comma, "expected comma in binary constantexpr") ||
      ParseGlobalTypeAndValue(Val1) ||
      ParseToken(lltok::rparen, "expected ')' in binary constantexpr"))
    return true;
  if (Val0->getType() != Val1->getType())
    return Error(ID.Loc, "operands of constexpr must have same type");
  if (!Val0->getType()->isIntOrIntVectorTy()) {
    if (NUW)
      return Error(ModifierLoc, "nuw only applies to integer operations");
    if (NSW)
      return Error(ModifierLoc, "nsw only applies to integer operations");
  }
  // Check that the type is valid for the operator.
  switch (Opc) {
  case Instruction::Add:
  case Instruction::Sub:
  case Instruction::Mul:
  case Instruction::UDiv:
  case Instruction::SDiv:
  case Instruction::URem:
  case Instruction::SRem:
  case Instruction::Shl:
  case Instruction::AShr:
  case Instruction::LShr:
    if (!Val0->getType()->isIntOrIntVectorTy())
      return Error(ID.Loc, "constexpr requires integer operands");
    break;
  case Instruction::FAdd:
  case Instruction::FSub:
  case Instruction::FMul:
  case Instruction::FDiv:
  case Instruction::FRem:
    if (!Val0->getType()->isFPOrFPVectorTy())
      return Error(ID.Loc, "constexpr requires fp operands");
    break;
  default: llvm_unreachable("Unknown binary operator!")::llvm::llvm_unreachable_internal("Unknown binary operator!",
 "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3248);
  }
  unsigned Flags = 0;
  if (NUW)   Flags |= OverflowingBinaryOperator::NoUnsignedWrap;
  if (NSW)   Flags |= OverflowingBinaryOperator::NoSignedWrap;
  if (Exact) Flags |= PossiblyExactOperator::IsExact;
  Constant *C = ConstantExpr::get(Opc, Val0, Val1, Flags);
  ID.ConstantVal = C;
  ID.Kind = ValID::t_Constant;
  return false;
}

// Logical Operations
case lltok::kw_and:
case lltok::kw_or:
case lltok::kw_xor: {
  unsigned Opc = Lex.getUIntVal();
  Constant *Val0, *Val1;
  Lex.Lex();
  if (ParseToken(lltok::lparen, "expected '(' in logical constantexpr") ||
      ParseGlobalTypeAndValue(Val0) ||
      ParseToken(lltok::comma, "expected comma in logical constantexpr") ||
      ParseGlobalTypeAndValue(Val1) ||
      ParseToken(lltok::rparen, "expected ')' in logical constantexpr"))
    return true;
  if (Val0->getType() != Val1->getType())
    return Error(ID.Loc, "operands of constexpr must have same type");
  if (!Val0->getType()->isIntOrIntVectorTy())
    return Error(ID.Loc,
                 "constexpr requires integer or integer vector operands");
  ID.ConstantVal = ConstantExpr::get(Opc, Val0, Val1);
  ID.Kind = ValID::t_Constant;
  return false;
}

case lltok::kw_getelementptr:
case lltok::kw_shufflevector:
case lltok::kw_insertelement:
case lltok::kw_extractelement:
case lltok::kw_select: {
  unsigned Opc = Lex.getUIntVal();
  SmallVector<Constant*, 16> Elts;
  bool InBounds = false;
  Type *Ty;
  Lex.Lex();

  if (Opc == Instruction::GetElementPtr)
    InBounds = EatIfPresent(lltok::kw_inbounds);

  if (ParseToken(lltok::lparen, "expected '(' in constantexpr"))
    return true;

  LocTy ExplicitTypeLoc = Lex.getLoc();
  if (Opc == Instruction::GetElementPtr) {
    if (ParseType(Ty) ||
        ParseToken(lltok::comma, "expected comma after getelementptr's type"))
      return true;
  }

  Optional<unsigned> InRangeOp;
  if (ParseGlobalValueVector(
          Elts, Opc == Instruction::GetElementPtr ? &InRangeOp : nullptr) ||
      ParseToken(lltok::rparen, "expected ')' in constantexpr"))
    return true;

  if (Opc == Instruction::GetElementPtr) {
    if (Elts.size() == 0 ||
        !Elts[0]->getType()->isPtrOrPtrVectorTy())
      return Error(ID.Loc, "base of getelementptr must be a pointer");

    Type *BaseType = Elts[0]->getType();
    auto *BasePointerType = cast<PointerType>(BaseType->getScalarType());
    if (Ty != BasePointerType->getElementType())
      return Error(
          ExplicitTypeLoc,
          "explicit pointee type doesn't match operand's pointee type");

    unsigned GEPWidth =
        BaseType->isVectorTy() ? BaseType->getVectorNumElements() : 0;

    ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
    for (Constant *Val : Indices) {
      Type *ValTy = Val->getType();
      if (!ValTy->isIntOrIntVectorTy())
        return Error(ID.Loc, "getelementptr index must be an integer");
      if (ValTy->isVectorTy()) {
        unsigned ValNumEl = ValTy->getVectorNumElements();
        if (GEPWidth && (ValNumEl != GEPWidth))
          return Error(
              ID.Loc,
              "getelementptr vector index has a wrong number of elements");
        // GEPWidth may have been unknown because the base is a scalar,
        // but it is known now.
        GEPWidth = ValNumEl;
      }
    }

    SmallPtrSet<Type*, 4> Visited;
    if (!Indices.empty() && !Ty->isSized(&Visited))
      return Error(ID.Loc, "base element of getelementptr must be sized");

    if (!GetElementPtrInst::getIndexedType(Ty, Indices))
      return Error(ID.Loc, "invalid getelementptr indices");

    if (InRangeOp) {
      if (*InRangeOp == 0)
        return Error(ID.Loc,
                     "inrange keyword may not appear on pointer operand");
      --*InRangeOp;
    }

    ID.ConstantVal = ConstantExpr::getGetElementPtr(Ty, Elts[0], Indices,
                                                    InBounds, InRangeOp);
  } else if (Opc == Instruction::Select) {
    if (Elts.size() != 3)
      return Error(ID.Loc, "expected three operands to select");
    if (const char *Reason = SelectInst::areInvalidOperands(Elts[0], Elts[1],
                                                            Elts[2]))
      return Error(ID.Loc, Reason);
    ID.ConstantVal = ConstantExpr::getSelect(Elts[0], Elts[1], Elts[2]);
  } else if (Opc == Instruction::ShuffleVector) {
    if (Elts.size() != 3)
      return Error(ID.Loc, "expected three operands to shufflevector");
    if (!ShuffleVectorInst::isValidOperands(Elts[0], Elts[1], Elts[2]))
      return Error(ID.Loc, "invalid operands to shufflevector");
    ID.ConstantVal =
               ConstantExpr::getShuffleVector(Elts[0], Elts[1],Elts[2]);
  } else if (Opc == Instruction::ExtractElement) {
    if (Elts.size() != 2)
      return Error(ID.Loc, "expected two operands to extractelement");
    if (!ExtractElementInst::isValidOperands(Elts[0], Elts[1]))
      return Error(ID.Loc, "invalid extractelement operands");
    ID.ConstantVal = ConstantExpr::getExtractElement(Elts[0], Elts[1]);
  } else {
    assert(Opc == Instruction::InsertElement && "Unknown opcode")(static_cast <bool> (Opc == Instruction::InsertElement &&
 "Unknown opcode") ? void (0) : __assert_fail ("Opc == Instruction::InsertElement && \"Unknown opcode\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3382, __extension__ __PRETTY_FUNCTION__));
    if (Elts.size() != 3)
    return Error(ID.Loc, "expected three operands to insertelement");
    if (!InsertElementInst::isValidOperands(Elts[0], Elts[1], Elts[2]))
      return Error(ID.Loc, "invalid insertelement operands");
    ID.ConstantVal =
               ConstantExpr::getInsertElement(Elts[0], Elts[1],Elts[2]);
  }

  ID.Kind = ValID::t_Constant;
  return false;
}
}

Lex.Lex();
return false;
3398}

3400/// ParseGlobalValue - Parse a global value with the specified type.
3401bool LLParser::ParseGlobalValue(Type *Ty, Constant *&C) {
C = nullptr;
ValID ID;
Value *V = nullptr;
bool Parsed = ParseValID(ID) ||
              ConvertValIDToValue(Ty, ID, V, nullptr, /*IsCall=*/false);
if (V && !(C = dyn_cast<Constant>(V)))
  return Error(ID.Loc, "global values must be constants");
return Parsed;
3410}

3412bool LLParser::ParseGlobalTypeAndValue(Constant *&V) {
Type *Ty = nullptr;
return ParseType(Ty) ||
       ParseGlobalValue(Ty, V);
3416}

3418bool LLParser::parseOptionalComdat(StringRef GlobalName, Comdat *&C) {
C = nullptr;

LocTy KwLoc = Lex.getLoc();
if (!EatIfPresent(lltok::kw_comdat))
  return false;

if (EatIfPresent(lltok::lparen)) {
  if (Lex.getKind() != lltok::ComdatVar)
    return TokError("expected comdat variable");
  C = getComdat(Lex.getStrVal(), Lex.getLoc());
  Lex.Lex();
  if (ParseToken(lltok::rparen, "expected ')' after comdat var"))
    return true;
} else {
  if (GlobalName.empty())
    return TokError("comdat cannot be unnamed");
  C = getComdat(GlobalName, KwLoc);
}

return false;
3439}

3441/// ParseGlobalValueVector
3442///   ::= /*empty*/
3443///   ::= [inrange] TypeAndValue (',' [inrange] TypeAndValue)*
3444bool LLParser::ParseGlobalValueVector(SmallVectorImpl<Constant *> &Elts,
                                    Optional<unsigned> *InRangeOp) {
// Empty list.
if (Lex.getKind() == lltok::rbrace ||
    Lex.getKind() == lltok::rsquare ||
    Lex.getKind() == lltok::greater ||
    Lex.getKind() == lltok::rparen)
  return false;

do {
  if (InRangeOp && !*InRangeOp && EatIfPresent(lltok::kw_inrange))
    *InRangeOp = Elts.size();

  Constant *C;
  if (ParseGlobalTypeAndValue(C)) return true;
  Elts.push_back(C);
} while (EatIfPresent(lltok::comma));

return false;
3463}

3465bool LLParser::ParseMDTuple(MDNode *&MD, bool IsDistinct) {
SmallVector<Metadata *, 16> Elts;
if (ParseMDNodeVector(Elts))
  return true;

MD = (IsDistinct ? MDTuple::getDistinct : MDTuple::get)(Context, Elts);
return false;
3472}

3474/// MDNode:
3475///  ::= !{ ... }
3476///  ::= !7
3477///  ::= !DILocation(...)
3478bool LLParser::ParseMDNode(MDNode *&N) {
if (Lex.getKind() == lltok::MetadataVar)
  return ParseSpecializedMDNode(N);

return ParseToken(lltok::exclaim, "expected '!' here") ||
       ParseMDNodeTail(N);
3484}

3486bool LLParser::ParseMDNodeTail(MDNode *&N) {
// !{ ... }
if (Lex.getKind() == lltok::lbrace)
  return ParseMDTuple(N);

// !42
return ParseMDNodeID(N);
3493}

3495namespace {

3497/// Structure to represent an optional metadata field.
3498template <class FieldTy> struct MDFieldImpl {
typedef MDFieldImpl ImplTy;
FieldTy Val;
bool Seen;

void assign(FieldTy Val) {
  Seen = true;
  this->Val = std::move(Val);
}

explicit MDFieldImpl(FieldTy Default)
    : Val(std::move(Default)), Seen(false) {}
3510};

3512/// Structure to represent an optional metadata field that
3513/// can be of either type (A or B) and encapsulates the
3514/// MD<typeofA>Field and MD<typeofB>Field structs, so not
3515/// to reimplement the specifics for representing each Field.
3516template <class FieldTypeA, class FieldTypeB> struct MDEitherFieldImpl {
typedef MDEitherFieldImpl<FieldTypeA, FieldTypeB> ImplTy;
FieldTypeA A;
FieldTypeB B;
bool Seen;

enum {
  IsInvalid = 0,
  IsTypeA = 1,
  IsTypeB = 2
} WhatIs;

void assign(FieldTypeA A) {
  Seen = true;
  this->A = std::move(A);
  WhatIs = IsTypeA;
}

void assign(FieldTypeB B) {
  Seen = true;
  this->B = std::move(B);
  WhatIs = IsTypeB;
}

explicit MDEitherFieldImpl(FieldTypeA DefaultA, FieldTypeB DefaultB)
    : A(std::move(DefaultA)), B(std::move(DefaultB)), Seen(false),
      WhatIs(IsInvalid) {}
3543};

3545struct MDUnsignedField : public MDFieldImpl<uint64_t> {
uint64_t Max;

MDUnsignedField(uint64_t Default = 0, uint64_t Max = UINT64_MAX(18446744073709551615UL))
    : ImplTy(Default), Max(Max) {}
3550};

3552struct LineField : public MDUnsignedField {
LineField() : MDUnsignedField(0, UINT32_MAX(4294967295U)) {}
3554};

3556struct ColumnField : public MDUnsignedField {
ColumnField() : MDUnsignedField(0, UINT16_MAX(65535)) {}
3558};

3560struct DwarfTagField : public MDUnsignedField {
DwarfTagField() : MDUnsignedField(0, dwarf::DW_TAG_hi_user) {}
DwarfTagField(dwarf::Tag DefaultTag)
    : MDUnsignedField(DefaultTag, dwarf::DW_TAG_hi_user) {}
3564};

3566struct DwarfMacinfoTypeField : public MDUnsignedField {
DwarfMacinfoTypeField() : MDUnsignedField(0, dwarf::DW_MACINFO_vendor_ext) {}
DwarfMacinfoTypeField(dwarf::MacinfoRecordType DefaultType)
  : MDUnsignedField(DefaultType, dwarf::DW_MACINFO_vendor_ext) {}
3570};

3572struct DwarfAttEncodingField : public MDUnsignedField {
DwarfAttEncodingField() : MDUnsignedField(0, dwarf::DW_ATE_hi_user) {}
3574};

3576struct DwarfVirtualityField : public MDUnsignedField {
DwarfVirtualityField() : MDUnsignedField(0, dwarf::DW_VIRTUALITY_max) {}
3578};

3580struct DwarfLangField : public MDUnsignedField {
DwarfLangField() : MDUnsignedField(0, dwarf::DW_LANG_hi_user) {}
3582};

3584struct DwarfCCField : public MDUnsignedField {
DwarfCCField() : MDUnsignedField(0, dwarf::DW_CC_hi_user) {}
3586};

3588struct EmissionKindField : public MDUnsignedField {
EmissionKindField() : MDUnsignedField(0, DICompileUnit::LastEmissionKind) {}
3590};

3592struct DIFlagField : public MDFieldImpl<DINode::DIFlags> {
DIFlagField() : MDFieldImpl(DINode::FlagZero) {}
3594};

3596struct MDSignedField : public MDFieldImpl<int64_t> {
int64_t Min;
int64_t Max;

MDSignedField(int64_t Default = 0)
    : ImplTy(Default), Min(INT64_MIN(-9223372036854775807L -1)), Max(INT64_MAX(9223372036854775807L)) {}
MDSignedField(int64_t Default, int64_t Min, int64_t Max)
    : ImplTy(Default), Min(Min), Max(Max) {}
3604};

3606struct MDBoolField : public MDFieldImpl<bool> {
MDBoolField(bool Default = false) : ImplTy(Default) {}
3608};

3610struct MDField : public MDFieldImpl<Metadata *> {
bool AllowNull;

MDField(bool AllowNull = true) : ImplTy(nullptr), AllowNull(AllowNull) {}
3614};

3616struct MDConstant : public MDFieldImpl<ConstantAsMetadata *> {
MDConstant() : ImplTy(nullptr) {}
3618};

3620struct MDStringField : public MDFieldImpl<MDString *> {
bool AllowEmpty;
MDStringField(bool AllowEmpty = true)
    : ImplTy(nullptr), AllowEmpty(AllowEmpty) {}
3624};

3626struct MDFieldList : public MDFieldImpl<SmallVector<Metadata *, 4>> {
MDFieldList() : ImplTy(SmallVector<Metadata *, 4>()) {}
3628};

3630struct ChecksumKindField : public MDFieldImpl<DIFile::ChecksumKind> {
ChecksumKindField(DIFile::ChecksumKind CSKind) : ImplTy(CSKind) {}
3632};

3634struct MDSignedOrMDField : MDEitherFieldImpl<MDSignedField, MDField> {
MDSignedOrMDField(int64_t Default = 0, bool AllowNull = true)
    : ImplTy(MDSignedField(Default), MDField(AllowNull)) {}

MDSignedOrMDField(int64_t Default, int64_t Min, int64_t Max,
                  bool AllowNull = true)
    : ImplTy(MDSignedField(Default, Min, Max), MDField(AllowNull)) {}

bool isMDSignedField() const { return WhatIs == IsTypeA; }
bool isMDField() const { return WhatIs == IsTypeB; }
int64_t getMDSignedValue() const {
  assert(isMDSignedField() && "Wrong field type")(static_cast <bool> (isMDSignedField() && "Wrong field type"
) ? void (0) : __assert_fail ("isMDSignedField() && \"Wrong field type\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3645, __extension__ __PRETTY_FUNCTION__));
  return A.Val;
}
Metadata *getMDFieldValue() const {
  assert(isMDField() && "Wrong field type")(static_cast <bool> (isMDField() && "Wrong field type"
) ? void (0) : __assert_fail ("isMDField() && \"Wrong field type\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3649, __extension__ __PRETTY_FUNCTION__));
  return B.Val;
}
3652};

3654struct MDSignedOrUnsignedField
  : MDEitherFieldImpl<MDSignedField, MDUnsignedField> {
MDSignedOrUnsignedField() : ImplTy(MDSignedField(0), MDUnsignedField(0)) {}

bool isMDSignedField() const { return WhatIs == IsTypeA; }
bool isMDUnsignedField() const { return WhatIs == IsTypeB; }
int64_t getMDSignedValue() const {
  assert(isMDSignedField() && "Wrong field type")(static_cast <bool> (isMDSignedField() && "Wrong field type"
) ? void (0) : __assert_fail ("isMDSignedField() && \"Wrong field type\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3661, __extension__ __PRETTY_FUNCTION__));
  return A.Val;
}
uint64_t getMDUnsignedValue() const {
  assert(isMDUnsignedField() && "Wrong field type")(static_cast <bool> (isMDUnsignedField() && "Wrong field type"
) ? void (0) : __assert_fail ("isMDUnsignedField() && \"Wrong field type\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3665, __extension__ __PRETTY_FUNCTION__));
  return B.Val;
}
3668};

3670} // end anonymous namespace

3672namespace llvm {

3674template <>
3675bool LLParser::ParseMDField(LocTy Loc, StringRef Name,
                          MDUnsignedField &Result) {
if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned())
  return TokError("expected unsigned integer");

auto &U = Lex.getAPSIntVal();
if (U.ugt(Result.Max))
  return TokError("value for '" + Name + "' too large, limit is " +
                  Twine(Result.Max));
Result.assign(U.getZExtValue());
assert(Result.Val <= Result.Max && "Expected value in range")(static_cast <bool> (Result.Val <= Result.Max &&
 "Expected value in range") ? void (0) : __assert_fail ("Result.Val <= Result.Max && \"Expected value in range\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3685, __extension__ __PRETTY_FUNCTION__));
Lex.Lex();
return false;
3688}

3690template <>
3691bool LLParser::ParseMDField(LocTy Loc, StringRef Name, LineField &Result) {
return ParseMDField(Loc, Name, static_cast<MDUnsignedField &>(Result));
3693}
3694template <>
3695bool LLParser::ParseMDField(LocTy Loc, StringRef Name, ColumnField &Result) {
return ParseMDField(Loc, Name, static_cast<MDUnsignedField &>(Result));
3697}

3699template <>
3700bool LLParser::ParseMDField(LocTy Loc, StringRef Name, DwarfTagField &Result) {
if (Lex.getKind() == lltok::APSInt)
  return ParseMDField(Loc, Name, static_cast<MDUnsignedField &>(Result));

if (Lex.getKind() != lltok::DwarfTag)
  return TokError("expected DWARF tag");

unsigned Tag = dwarf::getTag(Lex.getStrVal());
if (Tag == dwarf::DW_TAG_invalid)
  return TokError("invalid DWARF tag" + Twine(" '") + Lex.getStrVal() + "'");
assert(Tag <= Result.Max && "Expected valid DWARF tag")(static_cast <bool> (Tag <= Result.Max && "Expected valid DWARF tag"
) ? void (0) : __assert_fail ("Tag <= Result.Max && \"Expected valid DWARF tag\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3710, __extension__ __PRETTY_FUNCTION__));

Result.assign(Tag);
Lex.Lex();
return false;
3715}

3717template <>
3718bool LLParser::ParseMDField(LocTy Loc, StringRef Name,
                          DwarfMacinfoTypeField &Result) {
if (Lex.getKind() == lltok::APSInt)
  return ParseMDField(Loc, Name, static_cast<MDUnsignedField &>(Result));

if (Lex.getKind() != lltok::DwarfMacinfo)
  return TokError("expected DWARF macinfo type");

unsigned Macinfo = dwarf::getMacinfo(Lex.getStrVal());
if (Macinfo == dwarf::DW_MACINFO_invalid)
  return TokError(
      "invalid DWARF macinfo type" + Twine(" '") + Lex.getStrVal() + "'");
assert(Macinfo <= Result.Max && "Expected valid DWARF macinfo type")(static_cast <bool> (Macinfo <= Result.Max &&
 "Expected valid DWARF macinfo type") ? void (0) : __assert_fail
 ("Macinfo <= Result.Max && \"Expected valid DWARF macinfo type\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3730, __extension__ __PRETTY_FUNCTION__));

Result.assign(Macinfo);
Lex.Lex();
return false;
3735}

3737template <>
3738bool LLParser::ParseMDField(LocTy Loc, StringRef Name,
                          DwarfVirtualityField &Result) {
if (Lex.getKind() == lltok::APSInt)
  return ParseMDField(Loc, Name, static_cast<MDUnsignedField &>(Result));

if (Lex.getKind() != lltok::DwarfVirtuality)
  return TokError("expected DWARF virtuality code");

unsigned Virtuality = dwarf::getVirtuality(Lex.getStrVal());
if (Virtuality == dwarf::DW_VIRTUALITY_invalid)
  return TokError("invalid DWARF virtuality code" + Twine(" '") +
                  Lex.getStrVal() + "'");
assert(Virtuality <= Result.Max && "Expected valid DWARF virtuality code")(static_cast <bool> (Virtuality <= Result.Max &&
 "Expected valid DWARF virtuality code") ? void (0) : __assert_fail
 ("Virtuality <= Result.Max && \"Expected valid DWARF virtuality code\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3750, __extension__ __PRETTY_FUNCTION__));
Result.assign(Virtuality);
Lex.Lex();
return false;
3754}

3756template <>
3757bool LLParser::ParseMDField(LocTy Loc, StringRef Name, DwarfLangField &Result) {
if (Lex.getKind() == lltok::APSInt)
  return ParseMDField(Loc, Name, static_cast<MDUnsignedField &>(Result));

if (Lex.getKind() != lltok::DwarfLang)
  return TokError("expected DWARF language");

unsigned Lang = dwarf::getLanguage(Lex.getStrVal());
if (!Lang)
  return TokError("invalid DWARF language" + Twine(" '") + Lex.getStrVal() +
                  "'");
assert(Lang <= Result.Max && "Expected valid DWARF language")(static_cast <bool> (Lang <= Result.Max && "Expected valid DWARF language"
) ? void (0) : __assert_fail ("Lang <= Result.Max && \"Expected valid DWARF language\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3768, __extension__ __PRETTY_FUNCTION__));
Result.assign(Lang);
Lex.Lex();
return false;
3772}

3774template <>
3775bool LLParser::ParseMDField(LocTy Loc, StringRef Name, DwarfCCField &Result) {
if (Lex.getKind() == lltok::APSInt)
  return ParseMDField(Loc, Name, static_cast<MDUnsignedField &>(Result));

if (Lex.getKind() != lltok::DwarfCC)
  return TokError("expected DWARF calling convention");

unsigned CC = dwarf::getCallingConvention(Lex.getStrVal());
if (!CC)
  return TokError("invalid DWARF calling convention" + Twine(" '") + Lex.getStrVal() +
                  "'");
assert(CC <= Result.Max && "Expected valid DWARF calling convention")(static_cast <bool> (CC <= Result.Max && "Expected valid DWARF calling convention"
) ? void (0) : __assert_fail ("CC <= Result.Max && \"Expected valid DWARF calling convention\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3786, __extension__ __PRETTY_FUNCTION__));
Result.assign(CC);
Lex.Lex();
return false;
3790}

3792template <>
3793bool LLParser::ParseMDField(LocTy Loc, StringRef Name, EmissionKindField &Result) {
if (Lex.getKind() == lltok::APSInt)
  return ParseMDField(Loc, Name, static_cast<MDUnsignedField &>(Result));

if (Lex.getKind() != lltok::EmissionKind)
  return TokError("expected emission kind");

auto Kind = DICompileUnit::getEmissionKind(Lex.getStrVal());
if (!Kind)
  return TokError("invalid emission kind" + Twine(" '") + Lex.getStrVal() +
                  "'");
assert(*Kind <= Result.Max && "Expected valid emission kind")(static_cast <bool> (*Kind <= Result.Max && "Expected valid emission kind"
) ? void (0) : __assert_fail ("*Kind <= Result.Max && \"Expected valid emission kind\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3804, __extension__ __PRETTY_FUNCTION__));
Result.assign(*Kind);
Lex.Lex();
return false;
3808}

3810template <>
3811bool LLParser::ParseMDField(LocTy Loc, StringRef Name,
                          DwarfAttEncodingField &Result) {
if (Lex.getKind() == lltok::APSInt)
  return ParseMDField(Loc, Name, static_cast<MDUnsignedField &>(Result));

if (Lex.getKind() != lltok::DwarfAttEncoding)
  return TokError("expected DWARF type attribute encoding");

unsigned Encoding = dwarf::getAttributeEncoding(Lex.getStrVal());
if (!Encoding)
  return TokError("invalid DWARF type attribute encoding" + Twine(" '") +
                  Lex.getStrVal() + "'");
assert(Encoding <= Result.Max && "Expected valid DWARF language")(static_cast <bool> (Encoding <= Result.Max &&
 "Expected valid DWARF language") ? void (0) : __assert_fail (
"Encoding <= Result.Max && \"Expected valid DWARF language\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3823, __extension__ __PRETTY_FUNCTION__));
Result.assign(Encoding);
Lex.Lex();
return false;
3827}

3829/// DIFlagField
3830///  ::= uint32
3831///  ::= DIFlagVector
3832///  ::= DIFlagVector '|' DIFlagFwdDecl '|' uint32 '|' DIFlagPublic
3833template <>
3834bool LLParser::ParseMDField(LocTy Loc, StringRef Name, DIFlagField &Result) {

// Parser for a single flag.
auto parseFlag = [&](DINode::DIFlags &Val) {
  if (Lex.getKind() == lltok::APSInt && !Lex.getAPSIntVal().isSigned()) {
    uint32_t TempVal = static_cast<uint32_t>(Val);
    bool Res = ParseUInt32(TempVal);
    Val = static_cast<DINode::DIFlags>(TempVal);
    return Res;
  }

  if (Lex.getKind() != lltok::DIFlag)
    return TokError("expected debug info flag");

  Val = DINode::getFlag(Lex.getStrVal());
  if (!Val)
    return TokError(Twine("invalid debug info flag flag '") +
                    Lex.getStrVal() + "'");
  Lex.Lex();
  return false;
};

// Parse the flags and combine them together.
DINode::DIFlags Combined = DINode::FlagZero;
do {
  DINode::DIFlags Val;
  if (parseFlag(Val))
    return true;
  Combined |= Val;
} while (EatIfPresent(lltok::bar));

Result.assign(Combined);
return false;
3867}

3869template <>
3870bool LLParser::ParseMDField(LocTy Loc, StringRef Name,
                          MDSignedField &Result) {
if (Lex.getKind() != lltok::APSInt)
  return TokError("expected signed integer");

auto &S = Lex.getAPSIntVal();
if (S < Result.Min)
  return TokError("value for '" + Name + "' too small, limit is " +
                  Twine(Result.Min));
if (S > Result.Max)
  return TokError("value for '" + Name + "' too large, limit is " +
                  Twine(Result.Max));
Result.assign(S.getExtValue());
assert(Result.Val >= Result.Min && "Expected value in range")(static_cast <bool> (Result.Val >= Result.Min &&
 "Expected value in range") ? void (0) : __assert_fail ("Result.Val >= Result.Min && \"Expected value in range\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3883, __extension__ __PRETTY_FUNCTION__));
assert(Result.Val <= Result.Max && "Expected value in range")(static_cast <bool> (Result.Val <= Result.Max &&
 "Expected value in range") ? void (0) : __assert_fail ("Result.Val <= Result.Max && \"Expected value in range\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 3884, __extension__ __PRETTY_FUNCTION__));
Lex.Lex();
return false;
3887}

3889template <>
3890bool LLParser::ParseMDField(LocTy Loc, StringRef Name, MDBoolField &Result) {
switch (Lex.getKind()) {
default:
  return TokError("expected 'true' or 'false'");
case lltok::kw_true:
  Result.assign(true);
  break;
case lltok::kw_false:
  Result.assign(false);
  break;
}
Lex.Lex();
return false;
3903}

3905template <>
3906bool LLParser::ParseMDField(LocTy Loc, StringRef Name, MDField &Result) {
if (Lex.getKind() == lltok::kw_null) {
  if (!Result.AllowNull)
    return TokError("'" + Name + "' cannot be null");
  Lex.Lex();
  Result.assign(nullptr);
  return false;
}

Metadata *MD;
if (ParseMetadata(MD, nullptr))
  return true;

Result.assign(MD);
return false;
3921}

3923template <>
3924bool LLParser::ParseMDField(LocTy Loc, StringRef Name,
                          MDSignedOrMDField &Result) {
// Try to parse a signed int.
if (Lex.getKind() == lltok::APSInt) {
  MDSignedField Res = Result.A;
  if (!ParseMDField(Loc, Name, Res)) {
    Result.assign(Res);
    return false;
  }
  return true;
}

// Otherwise, try to parse as an MDField.
MDField Res = Result.B;
if (!ParseMDField(Loc, Name, Res)) {
  Result.assign(Res);
  return false;
}

return true;
3944}

3946template <>
3947bool LLParser::ParseMDField(LocTy Loc, StringRef Name,
                          MDSignedOrUnsignedField &Result) {
if (Lex.getKind() != lltok::APSInt)
  return false;

if (Lex.getAPSIntVal().isSigned()) {
  MDSignedField Res = Result.A;
  if (ParseMDField(Loc, Name, Res))
    return true;
  Result.assign(Res);
  return false;
}

MDUnsignedField Res = Result.B;
if (ParseMDField(Loc, Name, Res))
  return true;
Result.assign(Res);
return false;
3965}

3967template <>
3968bool LLParser::ParseMDField(LocTy Loc, StringRef Name, MDStringField &Result) {
LocTy ValueLoc = Lex.getLoc();
std::string S;
if (ParseStringConstant(S))
  return true;

if (!Result.AllowEmpty && S.empty())
  return Error(ValueLoc, "'" + Name + "' cannot be empty");

Result.assign(S.empty() ? nullptr : MDString::get(Context, S));
return false;
3979}

3981template <>
3982bool LLParser::ParseMDField(LocTy Loc, StringRef Name, MDFieldList &Result) {
SmallVector<Metadata *, 4> MDs;
if (ParseMDNodeVector(MDs))
  return true;

Result.assign(std::move(MDs));
return false;
3989}

3991template <>
3992bool LLParser::ParseMDField(LocTy Loc, StringRef Name,
                          ChecksumKindField &Result) {
Optional<DIFile::ChecksumKind> CSKind =
    DIFile::getChecksumKind(Lex.getStrVal());

if (Lex.getKind() != lltok::ChecksumKind || !CSKind)
  return TokError(
      "invalid checksum kind" + Twine(" '") + Lex.getStrVal() + "'");

Result.assign(*CSKind);
Lex.Lex();
return false;
4004}

4006} // end namespace llvm

4008template <class ParserTy>
4009bool LLParser::ParseMDFieldsImplBody(ParserTy parseField) {
do {
  if (Lex.getKind() != lltok::LabelStr)
    return TokError("expected field label here");

  if (parseField())
    return true;
} while (EatIfPresent(lltok::comma));

return false;
4019}

4021template <class ParserTy>
4022bool LLParser::ParseMDFieldsImpl(ParserTy parseField, LocTy &ClosingLoc) {
assert(Lex.getKind() == lltok::MetadataVar && "Expected metadata type name")(static_cast <bool> (Lex.getKind() == lltok::MetadataVar
 && "Expected metadata type name") ? void (0) : __assert_fail
 ("Lex.getKind() == lltok::MetadataVar && \"Expected metadata type name\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 4023, __extension__ __PRETTY_FUNCTION__));
Lex.Lex();

if (ParseToken(lltok::lparen, "expected '(' here"))
  return true;
if (Lex.getKind() != lltok::rparen)
  if (ParseMDFieldsImplBody(parseField))
    return true;

ClosingLoc = Lex.getLoc();
return ParseToken(lltok::rparen, "expected ')' here");
4034}

4036template <class FieldTy>
4037bool LLParser::ParseMDField(StringRef Name, FieldTy &Result) {
if (Result.Seen)
  return TokError("field '" + Name + "' cannot be specified more than once");

LocTy Loc = Lex.getLoc();
Lex.Lex();
return ParseMDField(Loc, Name, Result);
4044}

4046bool LLParser::ParseSpecializedMDNode(MDNode *&N, bool IsDistinct) {
assert(Lex.getKind() == lltok::MetadataVar && "Expected metadata type name")(static_cast <bool> (Lex.getKind() == lltok::MetadataVar
 && "Expected metadata type name") ? void (0) : __assert_fail
 ("Lex.getKind() == lltok::MetadataVar && \"Expected metadata type name\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 4047, __extension__ __PRETTY_FUNCTION__));

4049#define HANDLE_SPECIALIZED_MDNODE_LEAF(CLASS)                                  \
if (Lex.getStrVal() == #CLASS)                                               \
  return Parse##CLASS(N, IsDistinct);
4052#include "llvm/IR/Metadata.def"

return TokError("expected metadata type");
4055}

4057#define DECLARE_FIELD(NAME, TYPE, INIT) TYPE NAME INIT
4058#define NOP_FIELD(NAME, TYPE, INIT)
4059#define REQUIRE_FIELD(NAME, TYPE, INIT)                                        \
if (!NAME.Seen)                                                              \
  return Error(ClosingLoc, "missing required field '" #NAME "'");
4062#define PARSE_MD_FIELD(NAME, TYPE, DEFAULT)                                    \
if (Lex.getStrVal() == #NAME)                                                \
  return ParseMDField(#NAME, NAME);
4065#define PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false)                                                      \
VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD)                                \
do {                                                                         \
  LocTy ClosingLoc;                                                          \
  if (ParseMDFieldsImpl([&]() -> bool {                                      \
    VISIT_MD_FIELDS(PARSE_MD_FIELD, PARSE_MD_FIELD)                          \
    return TokError(Twine("invalid field '") + Lex.getStrVal() + "'");       \
  }, ClosingLoc))                                                            \
    return true;                                                             \
  VISIT_MD_FIELDS(NOP_FIELD, REQUIRE_FIELD)                                  \
} while (false)
4076#define GET_OR_DISTINCT(CLASS, ARGS)(IsDistinct ? CLASS::getDistinct ARGS : CLASS::get ARGS)                                           \
(IsDistinct ? CLASS::getDistinct ARGS : CLASS::get ARGS)

4079/// ParseDILocationFields:
4080///   ::= !DILocation(line: 43, column: 8, scope: !5, inlinedAt: !6)
4081bool LLParser::ParseDILocation(MDNode *&Result, bool IsDistinct) {
4082#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
OPTIONAL(line, LineField, );                                                 \
OPTIONAL(column, ColumnField, );                                             \
REQUIRED(scope, MDField, (/* AllowNull */ false));                           \
OPTIONAL(inlinedAt, MDField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4088#undef VISIT_MD_FIELDS

Result = GET_OR_DISTINCT((IsDistinct ? DILocation::getDistinct (Context, line.Val, column
.Val, scope.Val, inlinedAt.Val) : DILocation::get (Context, line
.Val, column.Val, scope.Val, inlinedAt.Val))
    DILocation, (Context, line.Val, column.Val, scope.Val, inlinedAt.Val))(IsDistinct ? DILocation::getDistinct (Context, line.Val, column
.Val, scope.Val, inlinedAt.Val) : DILocation::get (Context, line
.Val, column.Val, scope.Val, inlinedAt.Val));
return false;
4093}

4095/// ParseGenericDINode:
4096///   ::= !GenericDINode(tag: 15, header: "...", operands: {...})
4097bool LLParser::ParseGenericDINode(MDNode *&Result, bool IsDistinct) {
4098#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
REQUIRED(tag, DwarfTagField, );                                              \
OPTIONAL(header, MDStringField, );                                           \
OPTIONAL(operands, MDFieldList, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4103#undef VISIT_MD_FIELDS

Result = GET_OR_DISTINCT(GenericDINode,(IsDistinct ? GenericDINode::getDistinct (Context, tag.Val, header
.Val, operands.Val) : GenericDINode::get (Context, tag.Val, header
.Val, operands.Val))
                         (Context, tag.Val, header.Val, operands.Val))(IsDistinct ? GenericDINode::getDistinct (Context, tag.Val, header
.Val, operands.Val) : GenericDINode::get (Context, tag.Val, header
.Val, operands.Val));
return false;
4108}

4110/// ParseDISubrange:
4111///   ::= !DISubrange(count: 30, lowerBound: 2)
4112///   ::= !DISubrange(count: !node, lowerBound: 2)
4113bool LLParser::ParseDISubrange(MDNode *&Result, bool IsDistinct) {
4114#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
REQUIRED(count, MDSignedOrMDField, (-1, -1, INT64_MAX(9223372036854775807L), false));              \
OPTIONAL(lowerBound, MDSignedField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4118#undef VISIT_MD_FIELDS

if (count.isMDSignedField())
  Result = GET_OR_DISTINCT((IsDistinct ? DISubrange::getDistinct (Context, count.getMDSignedValue
(), lowerBound.Val) : DISubrange::get (Context, count.getMDSignedValue
(), lowerBound.Val))
      DISubrange, (Context, count.getMDSignedValue(), lowerBound.Val))(IsDistinct ? DISubrange::getDistinct (Context, count.getMDSignedValue
(), lowerBound.Val) : DISubrange::get (Context, count.getMDSignedValue
(), lowerBound.Val));
else if (count.isMDField())
  Result = GET_OR_DISTINCT((IsDistinct ? DISubrange::getDistinct (Context, count.getMDFieldValue
(), lowerBound.Val) : DISubrange::get (Context, count.getMDFieldValue
(), lowerBound.Val))
      DISubrange, (Context, count.getMDFieldValue(), lowerBound.Val))(IsDistinct ? DISubrange::getDistinct (Context, count.getMDFieldValue
(), lowerBound.Val) : DISubrange::get (Context, count.getMDFieldValue
(), lowerBound.Val));
else
  return true;

return false;
4130}

4132/// ParseDIEnumerator:
4133///   ::= !DIEnumerator(value: 30, isUnsigned: true, name: "SomeKind")
4134bool LLParser::ParseDIEnumerator(MDNode *&Result, bool IsDistinct) {
4135#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
REQUIRED(name, MDStringField, );                                             \
REQUIRED(value, MDSignedOrUnsignedField, );                                  \
OPTIONAL(isUnsigned, MDBoolField, (false));
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4140#undef VISIT_MD_FIELDS

if (isUnsigned.Val && value.isMDSignedField())
  return TokError("unsigned enumerator with negative value");

int64_t Value = value.isMDSignedField()
                    ? value.getMDSignedValue()
                    : static_cast<int64_t>(value.getMDUnsignedValue());
Result =
    GET_OR_DISTINCT(DIEnumerator, (Context, Value, isUnsigned.Val, name.Val))(IsDistinct ? DIEnumerator::getDistinct (Context, Value, isUnsigned
.Val, name.Val) : DIEnumerator::get (Context, Value, isUnsigned
.Val, name.Val));

return false;
4152}

4154/// ParseDIBasicType:
4155///   ::= !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32)
4156bool LLParser::ParseDIBasicType(MDNode *&Result, bool IsDistinct) {
4157#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
OPTIONAL(tag, DwarfTagField, (dwarf::DW_TAG_base_type));                     \
OPTIONAL(name, MDStringField, );                                             \
OPTIONAL(size, MDUnsignedField, (0, UINT64_MAX(18446744073709551615UL)));                            \
OPTIONAL(align, MDUnsignedField, (0, UINT32_MAX(4294967295U)));                           \
OPTIONAL(encoding, DwarfAttEncodingField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4164#undef VISIT_MD_FIELDS

Result = GET_OR_DISTINCT(DIBasicType, (Context, tag.Val, name.Val, size.Val,(IsDistinct ? DIBasicType::getDistinct (Context, tag.Val, name
.Val, size.Val, align.Val, encoding.Val) : DIBasicType::get (
Context, tag.Val, name.Val, size.Val, align.Val, encoding.Val
))
                                       align.Val, encoding.Val))(IsDistinct ? DIBasicType::getDistinct (Context, tag.Val, name
.Val, size.Val, align.Val, encoding.Val) : DIBasicType::get (
Context, tag.Val, name.Val, size.Val, align.Val, encoding.Val
));
return false;
4169}

4171/// ParseDIDerivedType:
4172///   ::= !DIDerivedType(tag: DW_TAG_pointer_type, name: "int", file: !0,
4173///                      line: 7, scope: !1, baseType: !2, size: 32,
4174///                      align: 32, offset: 0, flags: 0, extraData: !3,
4175///                      dwarfAddressSpace: 3)
4176bool LLParser::ParseDIDerivedType(MDNode *&Result, bool IsDistinct) {
4177#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
REQUIRED(tag, DwarfTagField, );                                              \
OPTIONAL(name, MDStringField, );                                             \
OPTIONAL(file, MDField, );                                                   \
OPTIONAL(line, LineField, );                                                 \
OPTIONAL(scope, MDField, );                                                  \
REQUIRED(baseType, MDField, );                                               \
OPTIONAL(size, MDUnsignedField, (0, UINT64_MAX(18446744073709551615UL)));                            \
OPTIONAL(align, MDUnsignedField, (0, UINT32_MAX(4294967295U)));                           \
OPTIONAL(offset, MDUnsignedField, (0, UINT64_MAX(18446744073709551615UL)));                          \
OPTIONAL(flags, DIFlagField, );                                              \
OPTIONAL(extraData, MDField, );                                              \
OPTIONAL(dwarfAddressSpace, MDUnsignedField, (UINT32_MAX(4294967295U), UINT32_MAX(4294967295U)));
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4191#undef VISIT_MD_FIELDS

Optional<unsigned> DWARFAddressSpace;
if (dwarfAddressSpace.Val != UINT32_MAX(4294967295U))
  DWARFAddressSpace = dwarfAddressSpace.Val;

Result = GET_OR_DISTINCT(DIDerivedType,(IsDistinct ? DIDerivedType::getDistinct (Context, tag.Val, name
.Val, file.Val, line.Val, scope.Val, baseType.Val, size.Val, align
.Val, offset.Val, DWARFAddressSpace, flags.Val, extraData.Val
) : DIDerivedType::get (Context, tag.Val, name.Val, file.Val,
 line.Val, scope.Val, baseType.Val, size.Val, align.Val, offset
.Val, DWARFAddressSpace, flags.Val, extraData.Val))
                         (Context, tag.Val, name.Val, file.Val, line.Val,(IsDistinct ? DIDerivedType::getDistinct (Context, tag.Val, name
.Val, file.Val, line.Val, scope.Val, baseType.Val, size.Val, align
.Val, offset.Val, DWARFAddressSpace, flags.Val, extraData.Val
) : DIDerivedType::get (Context, tag.Val, name.Val, file.Val,
 line.Val, scope.Val, baseType.Val, size.Val, align.Val, offset
.Val, DWARFAddressSpace, flags.Val, extraData.Val))
                          scope.Val, baseType.Val, size.Val, align.Val,(IsDistinct ? DIDerivedType::getDistinct (Context, tag.Val, name
.Val, file.Val, line.Val, scope.Val, baseType.Val, size.Val, align
.Val, offset.Val, DWARFAddressSpace, flags.Val, extraData.Val
) : DIDerivedType::get (Context, tag.Val, name.Val, file.Val,
 line.Val, scope.Val, baseType.Val, size.Val, align.Val, offset
.Val, DWARFAddressSpace, flags.Val, extraData.Val))
                          offset.Val, DWARFAddressSpace, flags.Val,(IsDistinct ? DIDerivedType::getDistinct (Context, tag.Val, name
.Val, file.Val, line.Val, scope.Val, baseType.Val, size.Val, align
.Val, offset.Val, DWARFAddressSpace, flags.Val, extraData.Val
) : DIDerivedType::get (Context, tag.Val, name.Val, file.Val,
 line.Val, scope.Val, baseType.Val, size.Val, align.Val, offset
.Val, DWARFAddressSpace, flags.Val, extraData.Val))
                          extraData.Val))(IsDistinct ? DIDerivedType::getDistinct (Context, tag.Val, name
.Val, file.Val, line.Val, scope.Val, baseType.Val, size.Val, align
.Val, offset.Val, DWARFAddressSpace, flags.Val, extraData.Val
) : DIDerivedType::get (Context, tag.Val, name.Val, file.Val,
 line.Val, scope.Val, baseType.Val, size.Val, align.Val, offset
.Val, DWARFAddressSpace, flags.Val, extraData.Val));
return false;
4203}

4205bool LLParser::ParseDICompositeType(MDNode *&Result, bool IsDistinct) {
4206#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
REQUIRED(tag, DwarfTagField, );                                              \
OPTIONAL(name, MDStringField, );                                             \
OPTIONAL(file, MDField, );                                                   \
OPTIONAL(line, LineField, );                                                 \
OPTIONAL(scope, MDField, );                                                  \
OPTIONAL(baseType, MDField, );                                               \
OPTIONAL(size, MDUnsignedField, (0, UINT64_MAX(18446744073709551615UL)));                            \
OPTIONAL(align, MDUnsignedField, (0, UINT32_MAX(4294967295U)));                           \
OPTIONAL(offset, MDUnsignedField, (0, UINT64_MAX(18446744073709551615UL)));                          \
OPTIONAL(flags, DIFlagField, );                                              \
OPTIONAL(elements, MDField, );                                               \
OPTIONAL(runtimeLang, DwarfLangField, );                                     \
OPTIONAL(vtableHolder, MDField, );                                           \
OPTIONAL(templateParams, MDField, );                                         \
OPTIONAL(identifier, MDStringField, );                                       \
OPTIONAL(discriminator, MDField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4224#undef VISIT_MD_FIELDS

// If this has an identifier try to build an ODR type.
if (identifier.Val)
  if (auto *CT = DICompositeType::buildODRType(
          Context, *identifier.Val, tag.Val, name.Val, file.Val, line.Val,
          scope.Val, baseType.Val, size.Val, align.Val, offset.Val, flags.Val,
          elements.Val, runtimeLang.Val, vtableHolder.Val,
          templateParams.Val, discriminator.Val)) {
    Result = CT;
    return false;
  }

// Create a new node, and save it in the context if it belongs in the type
// map.
Result = GET_OR_DISTINCT((IsDistinct ? DICompositeType::getDistinct (Context, tag.Val,
 name.Val, file.Val, line.Val, scope.Val, baseType.Val, size.
Val, align.Val, offset.Val, flags.Val, elements.Val, runtimeLang
.Val, vtableHolder.Val, templateParams.Val, identifier.Val, discriminator
.Val) : DICompositeType::get (Context, tag.Val, name.Val, file
.Val, line.Val, scope.Val, baseType.Val, size.Val, align.Val,
 offset.Val, flags.Val, elements.Val, runtimeLang.Val, vtableHolder
.Val, templateParams.Val, identifier.Val, discriminator.Val))
    DICompositeType,(IsDistinct ? DICompositeType::getDistinct (Context, tag.Val,
 name.Val, file.Val, line.Val, scope.Val, baseType.Val, size.
Val, align.Val, offset.Val, flags.Val, elements.Val, runtimeLang
.Val, vtableHolder.Val, templateParams.Val, identifier.Val, discriminator
.Val) : DICompositeType::get (Context, tag.Val, name.Val, file
.Val, line.Val, scope.Val, baseType.Val, size.Val, align.Val,
 offset.Val, flags.Val, elements.Val, runtimeLang.Val, vtableHolder
.Val, templateParams.Val, identifier.Val, discriminator.Val))
    (Context, tag.Val, name.Val, file.Val, line.Val, scope.Val, baseType.Val,(IsDistinct ? DICompositeType::getDistinct (Context, tag.Val,
 name.Val, file.Val, line.Val, scope.Val, baseType.Val, size.
Val, align.Val, offset.Val, flags.Val, elements.Val, runtimeLang
.Val, vtableHolder.Val, templateParams.Val, identifier.Val, discriminator
.Val) : DICompositeType::get (Context, tag.Val, name.Val, file
.Val, line.Val, scope.Val, baseType.Val, size.Val, align.Val,
 offset.Val, flags.Val, elements.Val, runtimeLang.Val, vtableHolder
.Val, templateParams.Val, identifier.Val, discriminator.Val))
     size.Val, align.Val, offset.Val, flags.Val, elements.Val,(IsDistinct ? DICompositeType::getDistinct (Context, tag.Val,
 name.Val, file.Val, line.Val, scope.Val, baseType.Val, size.
Val, align.Val, offset.Val, flags.Val, elements.Val, runtimeLang
.Val, vtableHolder.Val, templateParams.Val, identifier.Val, discriminator
.Val) : DICompositeType::get (Context, tag.Val, name.Val, file
.Val, line.Val, scope.Val, baseType.Val, size.Val, align.Val,
 offset.Val, flags.Val, elements.Val, runtimeLang.Val, vtableHolder
.Val, templateParams.Val, identifier.Val, discriminator.Val))
     runtimeLang.Val, vtableHolder.Val, templateParams.Val, identifier.Val,(IsDistinct ? DICompositeType::getDistinct (Context, tag.Val,
 name.Val, file.Val, line.Val, scope.Val, baseType.Val, size.
Val, align.Val, offset.Val, flags.Val, elements.Val, runtimeLang
.Val, vtableHolder.Val, templateParams.Val, identifier.Val, discriminator
.Val) : DICompositeType::get (Context, tag.Val, name.Val, file
.Val, line.Val, scope.Val, baseType.Val, size.Val, align.Val,
 offset.Val, flags.Val, elements.Val, runtimeLang.Val, vtableHolder
.Val, templateParams.Val, identifier.Val, discriminator.Val))
     discriminator.Val))(IsDistinct ? DICompositeType::getDistinct (Context, tag.Val,
 name.Val, file.Val, line.Val, scope.Val, baseType.Val, size.
Val, align.Val, offset.Val, flags.Val, elements.Val, runtimeLang
.Val, vtableHolder.Val, templateParams.Val, identifier.Val, discriminator
.Val) : DICompositeType::get (Context, tag.Val, name.Val, file
.Val, line.Val, scope.Val, baseType.Val, size.Val, align.Val,
 offset.Val, flags.Val, elements.Val, runtimeLang.Val, vtableHolder
.Val, templateParams.Val, identifier.Val, discriminator.Val));
return false;
4246}

4248bool LLParser::ParseDISubroutineType(MDNode *&Result, bool IsDistinct) {
4249#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
OPTIONAL(flags, DIFlagField, );                                              \
OPTIONAL(cc, DwarfCCField, );                                                \
REQUIRED(types, MDField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4254#undef VISIT_MD_FIELDS

Result = GET_OR_DISTINCT(DISubroutineType,(IsDistinct ? DISubroutineType::getDistinct (Context, flags.Val
, cc.Val, types.Val) : DISubroutineType::get (Context, flags.
Val, cc.Val, types.Val))
                         (Context, flags.Val, cc.Val, types.Val))(IsDistinct ? DISubroutineType::getDistinct (Context, flags.Val
, cc.Val, types.Val) : DISubroutineType::get (Context, flags.
Val, cc.Val, types.Val));
return false;
4259}

4261/// ParseDIFileType:
4262///   ::= !DIFileType(filename: "path/to/file", directory: "/path/to/dir",
4263///                   checksumkind: CSK_MD5,
4264///                   checksum: "000102030405060708090a0b0c0d0e0f",
4265///                   source: "source file contents")
4266bool LLParser::ParseDIFile(MDNode *&Result, bool IsDistinct) {
// The default constructed value for checksumkind is required, but will never
// be used, as the parser checks if the field was actually Seen before using
// the Val.
4270#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
REQUIRED(filename, MDStringField, );                                         \
REQUIRED(directory, MDStringField, );                                        \
OPTIONAL(checksumkind, ChecksumKindField, (DIFile::CSK_MD5));                \
OPTIONAL(checksum, MDStringField, );                                         \
OPTIONAL(source, MDStringField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4277#undef VISIT_MD_FIELDS

Optional<DIFile::ChecksumInfo<MDString *>> OptChecksum;
if (checksumkind.Seen && checksum.Seen)
  OptChecksum.emplace(checksumkind.Val, checksum.Val);
else if (checksumkind.Seen || checksum.Seen)
  return Lex.Error("'checksumkind' and 'checksum' must be provided together");

Optional<MDString *> OptSource;
if (source.Seen)
  OptSource = source.Val;
Result = GET_OR_DISTINCT(DIFile, (Context, filename.Val, directory.Val,(IsDistinct ? DIFile::getDistinct (Context, filename.Val, directory
.Val, OptChecksum, OptSource) : DIFile::get (Context, filename
.Val, directory.Val, OptChecksum, OptSource))
                                  OptChecksum, OptSource))(IsDistinct ? DIFile::getDistinct (Context, filename.Val, directory
.Val, OptChecksum, OptSource) : DIFile::get (Context, filename
.Val, directory.Val, OptChecksum, OptSource));
return false;
4291}

4293/// ParseDICompileUnit:
4294///   ::= !DICompileUnit(language: DW_LANG_C99, file: !0, producer: "clang",
4295///                      isOptimized: true, flags: "-O2", runtimeVersion: 1,
4296///                      splitDebugFilename: "abc.debug",
4297///                      emissionKind: FullDebug, enums: !1, retainedTypes: !2,
4298///                      globals: !4, imports: !5, macros: !6, dwoId: 0x0abcd)
4299bool LLParser::ParseDICompileUnit(MDNode *&Result, bool IsDistinct) {
if (!IsDistinct)
  return Lex.Error("missing 'distinct', required for !DICompileUnit");

4303#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
REQUIRED(language, DwarfLangField, );                                        \
REQUIRED(file, MDField, (/* AllowNull */ false));                            \
OPTIONAL(producer, MDStringField, );                                         \
OPTIONAL(isOptimized, MDBoolField, );                                        \
OPTIONAL(flags, MDStringField, );                                            \
OPTIONAL(runtimeVersion, MDUnsignedField, (0, UINT32_MAX(4294967295U)));                  \
OPTIONAL(splitDebugFilename, MDStringField, );                               \
OPTIONAL(emissionKind, EmissionKindField, );                                 \
OPTIONAL(enums, MDField, );                                                  \
OPTIONAL(retainedTypes, MDField, );                                          \
OPTIONAL(globals, MDField, );                                                \
OPTIONAL(imports, MDField, );                                                \
OPTIONAL(macros, MDField, );                                                 \
OPTIONAL(dwoId, MDUnsignedField, );                                          \
OPTIONAL(splitDebugInlining, MDBoolField, = true);                           \
OPTIONAL(debugInfoForProfiling, MDBoolField, = false);                       \
OPTIONAL(gnuPubnames, MDBoolField, = false);
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4322#undef VISIT_MD_FIELDS

Result = DICompileUnit::getDistinct(
    Context, language.Val, file.Val, producer.Val, isOptimized.Val, flags.Val,
    runtimeVersion.Val, splitDebugFilename.Val, emissionKind.Val, enums.Val,
    retainedTypes.Val, globals.Val, imports.Val, macros.Val, dwoId.Val,
    splitDebugInlining.Val, debugInfoForProfiling.Val, gnuPubnames.Val);
return false;
4330}

4332/// ParseDISubprogram:
4333///   ::= !DISubprogram(scope: !0, name: "foo", linkageName: "_Zfoo",
4334///                     file: !1, line: 7, type: !2, isLocal: false,
4335///                     isDefinition: true, scopeLine: 8, containingType: !3,
4336///                     virtuality: DW_VIRTUALTIY_pure_virtual,
4337///                     virtualIndex: 10, thisAdjustment: 4, flags: 11,
4338///                     isOptimized: false, templateParams: !4, declaration: !5,
4339///                     variables: !6, thrownTypes: !7)
4340bool LLParser::ParseDISubprogram(MDNode *&Result, bool IsDistinct) {
auto Loc = Lex.getLoc();
4342#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
OPTIONAL(scope, MDField, );                                                  \
OPTIONAL(name, MDStringField, );                                             \
OPTIONAL(linkageName, MDStringField, );                                      \
OPTIONAL(file, MDField, );                                                   \
OPTIONAL(line, LineField, );                                                 \
OPTIONAL(type, MDField, );                                                   \
OPTIONAL(isLocal, MDBoolField, );                                            \
OPTIONAL(isDefinition, MDBoolField, (true));                                 \
OPTIONAL(scopeLine, LineField, );                                            \
OPTIONAL(containingType, MDField, );                                         \
OPTIONAL(virtuality, DwarfVirtualityField, );                                \
OPTIONAL(virtualIndex, MDUnsignedField, (0, UINT32_MAX(4294967295U)));                    \
OPTIONAL(thisAdjustment, MDSignedField, (0, INT32_MIN(-2147483647-1), INT32_MAX(2147483647)));          \
OPTIONAL(flags, DIFlagField, );                                              \
OPTIONAL(isOptimized, MDBoolField, );                                        \
OPTIONAL(unit, MDField, );                                                   \
OPTIONAL(templateParams, MDField, );                                         \
OPTIONAL(declaration, MDField, );                                            \
OPTIONAL(variables, MDField, );                                              \
OPTIONAL(thrownTypes, MDField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4364#undef VISIT_MD_FIELDS

if (isDefinition.Val && !IsDistinct)
  return Lex.Error(
      Loc,
      "missing 'distinct', required for !DISubprogram when 'isDefinition'");

Result = GET_OR_DISTINCT((IsDistinct ? DISubprogram::getDistinct (Context, scope.Val, name
.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal.
Val, isDefinition.Val, scopeLine.Val, containingType.Val, virtuality
.Val, virtualIndex.Val, thisAdjustment.Val, flags.Val, isOptimized
.Val, unit.Val, templateParams.Val, declaration.Val, variables
.Val, thrownTypes.Val) : DISubprogram::get (Context, scope.Val
, name.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal
.Val, isDefinition.Val, scopeLine.Val, containingType.Val, virtuality
.Val, virtualIndex.Val, thisAdjustment.Val, flags.Val, isOptimized
.Val, unit.Val, templateParams.Val, declaration.Val, variables
.Val, thrownTypes.Val))
    DISubprogram,(IsDistinct ? DISubprogram::getDistinct (Context, scope.Val, name
.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal.
Val, isDefinition.Val, scopeLine.Val, containingType.Val, virtuality
.Val, virtualIndex.Val, thisAdjustment.Val, flags.Val, isOptimized
.Val, unit.Val, templateParams.Val, declaration.Val, variables
.Val, thrownTypes.Val) : DISubprogram::get (Context, scope.Val
, name.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal
.Val, isDefinition.Val, scopeLine.Val, containingType.Val, virtuality
.Val, virtualIndex.Val, thisAdjustment.Val, flags.Val, isOptimized
.Val, unit.Val, templateParams.Val, declaration.Val, variables
.Val, thrownTypes.Val))
    (Context, scope.Val, name.Val, linkageName.Val, file.Val, line.Val,(IsDistinct ? DISubprogram::getDistinct (Context, scope.Val, name
.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal.
Val, isDefinition.Val, scopeLine.Val, containingType.Val, virtuality
.Val, virtualIndex.Val, thisAdjustment.Val, flags.Val, isOptimized
.Val, unit.Val, templateParams.Val, declaration.Val, variables
.Val, thrownTypes.Val) : DISubprogram::get (Context, scope.Val
, name.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal
.Val, isDefinition.Val, scopeLine.Val, containingType.Val, virtuality
.Val, virtualIndex.Val, thisAdjustment.Val, flags.Val, isOptimized
.Val, unit.Val, templateParams.Val, declaration.Val, variables
.Val, thrownTypes.Val))
     type.Val, isLocal.Val, isDefinition.Val, scopeLine.Val,(IsDistinct ? DISubprogram::getDistinct (Context, scope.Val, name
.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal.
Val, isDefinition.Val, scopeLine.Val, containingType.Val, virtuality
.Val, virtualIndex.Val, thisAdjustment.Val, flags.Val, isOptimized
.Val, unit.Val, templateParams.Val, declaration.Val, variables
.Val, thrownTypes.Val) : DISubprogram::get (Context, scope.Val
, name.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal
.Val, isDefinition.Val, scopeLine.Val, containingType.Val, virtuality
.Val, virtualIndex.Val, thisAdjustment.Val, flags.Val, isOptimized
.Val, unit.Val, templateParams.Val, declaration.Val, variables
.Val, thrownTypes.Val))
     containingType.Val, virtuality.Val, virtualIndex.Val, thisAdjustment.Val,(IsDistinct ? DISubprogram::getDistinct (Context, scope.Val, name
.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal.
Val, isDefinition.Val, scopeLine.Val, containingType.Val, virtuality
.Val, virtualIndex.Val, thisAdjustment.Val, flags.Val, isOptimized
.Val, unit.Val, templateParams.Val, declaration.Val, variables
.Val, thrownTypes.Val) : DISubprogram::get (Context, scope.Val
, name.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal
.Val, isDefinition.Val, scopeLine.Val, containingType.Val, virtuality
.Val, virtualIndex.Val, thisAdjustment.Val, flags.Val, isOptimized
.Val, unit.Val, templateParams.Val, declaration.Val, variables
.Val, thrownTypes.Val))
     flags.Val, isOptimized.Val, unit.Val, templateParams.Val,(IsDistinct ? DISubprogram::getDistinct (Context, scope.Val, name
.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal.
Val, isDefinition.Val, scopeLine.Val, containingType.Val, virtuality
.Val, virtualIndex.Val, thisAdjustment.Val, flags.Val, isOptimized
.Val, unit.Val, templateParams.Val, declaration.Val, variables
.Val, thrownTypes.Val) : DISubprogram::get (Context, scope.Val
, name.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal
.Val, isDefinition.Val, scopeLine.Val, containingType.Val, virtuality
.Val, virtualIndex.Val, thisAdjustment.Val, flags.Val, isOptimized
.Val, unit.Val, templateParams.Val, declaration.Val, variables
.Val, thrownTypes.Val))
     declaration.Val, variables.Val, thrownTypes.Val))(IsDistinct ? DISubprogram::getDistinct (Context, scope.Val, name
.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal.
Val, isDefinition.Val, scopeLine.Val, containingType.Val, virtuality
.Val, virtualIndex.Val, thisAdjustment.Val, flags.Val, isOptimized
.Val, unit.Val, templateParams.Val, declaration.Val, variables
.Val, thrownTypes.Val) : DISubprogram::get (Context, scope.Val
, name.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal
.Val, isDefinition.Val, scopeLine.Val, containingType.Val, virtuality
.Val, virtualIndex.Val, thisAdjustment.Val, flags.Val, isOptimized
.Val, unit.Val, templateParams.Val, declaration.Val, variables
.Val, thrownTypes.Val));
return false;
4379}

4381/// ParseDILexicalBlock:
4382///   ::= !DILexicalBlock(scope: !0, file: !2, line: 7, column: 9)
4383bool LLParser::ParseDILexicalBlock(MDNode *&Result, bool IsDistinct) {
4384#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
REQUIRED(scope, MDField, (/* AllowNull */ false));                           \
OPTIONAL(file, MDField, );                                                   \
OPTIONAL(line, LineField, );                                                 \
OPTIONAL(column, ColumnField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4390#undef VISIT_MD_FIELDS

Result = GET_OR_DISTINCT((IsDistinct ? DILexicalBlock::getDistinct (Context, scope.Val
, file.Val, line.Val, column.Val) : DILexicalBlock::get (Context
, scope.Val, file.Val, line.Val, column.Val))
    DILexicalBlock, (Context, scope.Val, file.Val, line.Val, column.Val))(IsDistinct ? DILexicalBlock::getDistinct (Context, scope.Val
, file.Val, line.Val, column.Val) : DILexicalBlock::get (Context
, scope.Val, file.Val, line.Val, column.Val));
return false;
4395}

4397/// ParseDILexicalBlockFile:
4398///   ::= !DILexicalBlockFile(scope: !0, file: !2, discriminator: 9)
4399bool LLParser::ParseDILexicalBlockFile(MDNode *&Result, bool IsDistinct) {
4400#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
REQUIRED(scope, MDField, (/* AllowNull */ false));                           \
OPTIONAL(file, MDField, );                                                   \
REQUIRED(discriminator, MDUnsignedField, (0, UINT32_MAX(4294967295U)));
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4405#undef VISIT_MD_FIELDS

Result = GET_OR_DISTINCT(DILexicalBlockFile,(IsDistinct ? DILexicalBlockFile::getDistinct (Context, scope
.Val, file.Val, discriminator.Val) : DILexicalBlockFile::get (
Context, scope.Val, file.Val, discriminator.Val))
                         (Context, scope.Val, file.Val, discriminator.Val))(IsDistinct ? DILexicalBlockFile::getDistinct (Context, scope
.Val, file.Val, discriminator.Val) : DILexicalBlockFile::get (
Context, scope.Val, file.Val, discriminator.Val));
return false;
4410}

4412/// ParseDINamespace:
4413///   ::= !DINamespace(scope: !0, file: !2, name: "SomeNamespace", line: 9)
4414bool LLParser::ParseDINamespace(MDNode *&Result, bool IsDistinct) {
4415#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
REQUIRED(scope, MDField, );                                                  \
OPTIONAL(name, MDStringField, );                                             \
OPTIONAL(exportSymbols, MDBoolField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4420#undef VISIT_MD_FIELDS

Result = GET_OR_DISTINCT(DINamespace,(IsDistinct ? DINamespace::getDistinct (Context, scope.Val, name
.Val, exportSymbols.Val) : DINamespace::get (Context, scope.Val
, name.Val, exportSymbols.Val))
                         (Context, scope.Val, name.Val, exportSymbols.Val))(IsDistinct ? DINamespace::getDistinct (Context, scope.Val, name
.Val, exportSymbols.Val) : DINamespace::get (Context, scope.Val
, name.Val, exportSymbols.Val));
return false;
4425}

4427/// ParseDIMacro:
4428///   ::= !DIMacro(macinfo: type, line: 9, name: "SomeMacro", value: "SomeValue")
4429bool LLParser::ParseDIMacro(MDNode *&Result, bool IsDistinct) {
4430#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
REQUIRED(type, DwarfMacinfoTypeField, );                                     \
OPTIONAL(line, LineField, );                                                 \
REQUIRED(name, MDStringField, );                                             \
OPTIONAL(value, MDStringField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4436#undef VISIT_MD_FIELDS

Result = GET_OR_DISTINCT(DIMacro,(IsDistinct ? DIMacro::getDistinct (Context, type.Val, line.Val
, name.Val, value.Val) : DIMacro::get (Context, type.Val, line
.Val, name.Val, value.Val))
                         (Context, type.Val, line.Val, name.Val, value.Val))(IsDistinct ? DIMacro::getDistinct (Context, type.Val, line.Val
, name.Val, value.Val) : DIMacro::get (Context, type.Val, line
.Val, name.Val, value.Val));
return false;
4441}

4443/// ParseDIMacroFile:
4444///   ::= !DIMacroFile(line: 9, file: !2, nodes: !3)
4445bool LLParser::ParseDIMacroFile(MDNode *&Result, bool IsDistinct) {
4446#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
OPTIONAL(type, DwarfMacinfoTypeField, (dwarf::DW_MACINFO_start_file));       \
OPTIONAL(line, LineField, );                                                 \
REQUIRED(file, MDField, );                                                   \
OPTIONAL(nodes, MDField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4452#undef VISIT_MD_FIELDS

Result = GET_OR_DISTINCT(DIMacroFile,(IsDistinct ? DIMacroFile::getDistinct (Context, type.Val, line
.Val, file.Val, nodes.Val) : DIMacroFile::get (Context, type.
Val, line.Val, file.Val, nodes.Val))
                         (Context, type.Val, line.Val, file.Val, nodes.Val))(IsDistinct ? DIMacroFile::getDistinct (Context, type.Val, line
.Val, file.Val, nodes.Val) : DIMacroFile::get (Context, type.
Val, line.Val, file.Val, nodes.Val));
return false;
4457}

4459/// ParseDIModule:
4460///   ::= !DIModule(scope: !0, name: "SomeModule", configMacros: "-DNDEBUG",
4461///                 includePath: "/usr/include", isysroot: "/")
4462bool LLParser::ParseDIModule(MDNode *&Result, bool IsDistinct) {
4463#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
REQUIRED(scope, MDField, );                                                  \
REQUIRED(name, MDStringField, );                                             \
OPTIONAL(configMacros, MDStringField, );                                     \
OPTIONAL(includePath, MDStringField, );                                      \
OPTIONAL(isysroot, MDStringField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4470#undef VISIT_MD_FIELDS

Result = GET_OR_DISTINCT(DIModule, (Context, scope.Val, name.Val,(IsDistinct ? DIModule::getDistinct (Context, scope.Val, name
.Val, configMacros.Val, includePath.Val, isysroot.Val) : DIModule
::get (Context, scope.Val, name.Val, configMacros.Val, includePath
.Val, isysroot.Val))
                         configMacros.Val, includePath.Val, isysroot.Val))(IsDistinct ? DIModule::getDistinct (Context, scope.Val, name
.Val, configMacros.Val, includePath.Val, isysroot.Val) : DIModule
::get (Context, scope.Val, name.Val, configMacros.Val, includePath
.Val, isysroot.Val));
return false;
4475}

4477/// ParseDITemplateTypeParameter:
4478///   ::= !DITemplateTypeParameter(name: "Ty", type: !1)
4479bool LLParser::ParseDITemplateTypeParameter(MDNode *&Result, bool IsDistinct) {
4480#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
OPTIONAL(name, MDStringField, );                                             \
REQUIRED(type, MDField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4484#undef VISIT_MD_FIELDS

Result =
    GET_OR_DISTINCT(DITemplateTypeParameter, (Context, name.Val, type.Val))(IsDistinct ? DITemplateTypeParameter::getDistinct (Context, name
.Val, type.Val) : DITemplateTypeParameter::get (Context, name
.Val, type.Val));
return false;
4489}

4491/// ParseDITemplateValueParameter:
4492///   ::= !DITemplateValueParameter(tag: DW_TAG_template_value_parameter,
4493///                                 name: "V", type: !1, value: i32 7)
4494bool LLParser::ParseDITemplateValueParameter(MDNode *&Result, bool IsDistinct) {
4495#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
OPTIONAL(tag, DwarfTagField, (dwarf::DW_TAG_template_value_parameter));      \
OPTIONAL(name, MDStringField, );                                             \
OPTIONAL(type, MDField, );                                                   \
REQUIRED(value, MDField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4501#undef VISIT_MD_FIELDS

Result = GET_OR_DISTINCT(DITemplateValueParameter,(IsDistinct ? DITemplateValueParameter::getDistinct (Context,
 tag.Val, name.Val, type.Val, value.Val) : DITemplateValueParameter
::get (Context, tag.Val, name.Val, type.Val, value.Val))
                         (Context, tag.Val, name.Val, type.Val, value.Val))(IsDistinct ? DITemplateValueParameter::getDistinct (Context,
 tag.Val, name.Val, type.Val, value.Val) : DITemplateValueParameter
::get (Context, tag.Val, name.Val, type.Val, value.Val));
return false;
4506}

4508/// ParseDIGlobalVariable:
4509///   ::= !DIGlobalVariable(scope: !0, name: "foo", linkageName: "foo",
4510///                         file: !1, line: 7, type: !2, isLocal: false,
4511///                         isDefinition: true, declaration: !3, align: 8)
4512bool LLParser::ParseDIGlobalVariable(MDNode *&Result, bool IsDistinct) {
4513#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
REQUIRED(name, MDStringField, (/* AllowEmpty */ false));                     \
OPTIONAL(scope, MDField, );                                                  \
OPTIONAL(linkageName, MDStringField, );                                      \
OPTIONAL(file, MDField, );                                                   \
OPTIONAL(line, LineField, );                                                 \
OPTIONAL(type, MDField, );                                                   \
OPTIONAL(isLocal, MDBoolField, );                                            \
OPTIONAL(isDefinition, MDBoolField, (true));                                 \
OPTIONAL(declaration, MDField, );                                            \
OPTIONAL(align, MDUnsignedField, (0, UINT32_MAX(4294967295U)));
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4525#undef VISIT_MD_FIELDS

Result = GET_OR_DISTINCT(DIGlobalVariable,(IsDistinct ? DIGlobalVariable::getDistinct (Context, scope.Val
, name.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal
.Val, isDefinition.Val, declaration.Val, align.Val) : DIGlobalVariable
::get (Context, scope.Val, name.Val, linkageName.Val, file.Val
, line.Val, type.Val, isLocal.Val, isDefinition.Val, declaration
.Val, align.Val))
                         (Context, scope.Val, name.Val, linkageName.Val,(IsDistinct ? DIGlobalVariable::getDistinct (Context, scope.Val
, name.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal
.Val, isDefinition.Val, declaration.Val, align.Val) : DIGlobalVariable
::get (Context, scope.Val, name.Val, linkageName.Val, file.Val
, line.Val, type.Val, isLocal.Val, isDefinition.Val, declaration
.Val, align.Val))
                          file.Val, line.Val, type.Val, isLocal.Val,(IsDistinct ? DIGlobalVariable::getDistinct (Context, scope.Val
, name.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal
.Val, isDefinition.Val, declaration.Val, align.Val) : DIGlobalVariable
::get (Context, scope.Val, name.Val, linkageName.Val, file.Val
, line.Val, type.Val, isLocal.Val, isDefinition.Val, declaration
.Val, align.Val))
                          isDefinition.Val, declaration.Val, align.Val))(IsDistinct ? DIGlobalVariable::getDistinct (Context, scope.Val
, name.Val, linkageName.Val, file.Val, line.Val, type.Val, isLocal
.Val, isDefinition.Val, declaration.Val, align.Val) : DIGlobalVariable
::get (Context, scope.Val, name.Val, linkageName.Val, file.Val
, line.Val, type.Val, isLocal.Val, isDefinition.Val, declaration
.Val, align.Val));
return false;
4532}

4534/// ParseDILocalVariable:
4535///   ::= !DILocalVariable(arg: 7, scope: !0, name: "foo",
4536///                        file: !1, line: 7, type: !2, arg: 2, flags: 7,
4537///                        align: 8)
4538///   ::= !DILocalVariable(scope: !0, name: "foo",
4539///                        file: !1, line: 7, type: !2, arg: 2, flags: 7,
4540///                        align: 8)
4541bool LLParser::ParseDILocalVariable(MDNode *&Result, bool IsDistinct) {
4542#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
REQUIRED(scope, MDField, (/* AllowNull */ false));                           \
OPTIONAL(name, MDStringField, );                                             \
OPTIONAL(arg, MDUnsignedField, (0, UINT16_MAX(65535)));                             \
OPTIONAL(file, MDField, );                                                   \
OPTIONAL(line, LineField, );                                                 \
OPTIONAL(type, MDField, );                                                   \
OPTIONAL(flags, DIFlagField, );                                              \
OPTIONAL(align, MDUnsignedField, (0, UINT32_MAX(4294967295U)));
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4552#undef VISIT_MD_FIELDS

Result = GET_OR_DISTINCT(DILocalVariable,(IsDistinct ? DILocalVariable::getDistinct (Context, scope.Val
, name.Val, file.Val, line.Val, type.Val, arg.Val, flags.Val,
 align.Val) : DILocalVariable::get (Context, scope.Val, name.
Val, file.Val, line.Val, type.Val, arg.Val, flags.Val, align.
Val))
                         (Context, scope.Val, name.Val, file.Val, line.Val,(IsDistinct ? DILocalVariable::getDistinct (Context, scope.Val
, name.Val, file.Val, line.Val, type.Val, arg.Val, flags.Val,
 align.Val) : DILocalVariable::get (Context, scope.Val, name.
Val, file.Val, line.Val, type.Val, arg.Val, flags.Val, align.
Val))
                          type.Val, arg.Val, flags.Val, align.Val))(IsDistinct ? DILocalVariable::getDistinct (Context, scope.Val
, name.Val, file.Val, line.Val, type.Val, arg.Val, flags.Val,
 align.Val) : DILocalVariable::get (Context, scope.Val, name.
Val, file.Val, line.Val, type.Val, arg.Val, flags.Val, align.
Val));
return false;
4558}

4560/// ParseDIExpression:
4561///   ::= !DIExpression(0, 7, -1)
4562bool LLParser::ParseDIExpression(MDNode *&Result, bool IsDistinct) {
assert(Lex.getKind() == lltok::MetadataVar && "Expected metadata type name")(static_cast <bool> (Lex.getKind() == lltok::MetadataVar
 && "Expected metadata type name") ? void (0) : __assert_fail
 ("Lex.getKind() == lltok::MetadataVar && \"Expected metadata type name\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 4563, __extension__ __PRETTY_FUNCTION__));
Lex.Lex();

if (ParseToken(lltok::lparen, "expected '(' here"))
  return true;

SmallVector<uint64_t, 8> Elements;
if (Lex.getKind() != lltok::rparen)
  do {
    if (Lex.getKind() == lltok::DwarfOp) {
      if (unsigned Op = dwarf::getOperationEncoding(Lex.getStrVal())) {
        Lex.Lex();
        Elements.push_back(Op);
        continue;
      }
      return TokError(Twine("invalid DWARF op '") + Lex.getStrVal() + "'");
    }

    if (Lex.getKind() != lltok::APSInt || Lex.getAPSIntVal().isSigned())
      return TokError("expected unsigned integer");

    auto &U = Lex.getAPSIntVal();
    if (U.ugt(UINT64_MAX(18446744073709551615UL)))
      return TokError("element too large, limit is " + Twine(UINT64_MAX(18446744073709551615UL)));
    Elements.push_back(U.getZExtValue());
    Lex.Lex();
  } while (EatIfPresent(lltok::comma));

if (ParseToken(lltok::rparen, "expected ')' here"))
  return true;

Result = GET_OR_DISTINCT(DIExpression, (Context, Elements))(IsDistinct ? DIExpression::getDistinct (Context, Elements) :
 DIExpression::get (Context, Elements));
return false;
4596}

4598/// ParseDIGlobalVariableExpression:
4599///   ::= !DIGlobalVariableExpression(var: !0, expr: !1)
4600bool LLParser::ParseDIGlobalVariableExpression(MDNode *&Result,
                                             bool IsDistinct) {
4602#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
REQUIRED(var, MDField, );                                                    \
REQUIRED(expr, MDField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4606#undef VISIT_MD_FIELDS

Result =
    GET_OR_DISTINCT(DIGlobalVariableExpression, (Context, var.Val, expr.Val))(IsDistinct ? DIGlobalVariableExpression::getDistinct (Context
, var.Val, expr.Val) : DIGlobalVariableExpression::get (Context
, var.Val, expr.Val));
return false;
4611}

4613/// ParseDIObjCProperty:
4614///   ::= !DIObjCProperty(name: "foo", file: !1, line: 7, setter: "setFoo",
4615///                       getter: "getFoo", attributes: 7, type: !2)
4616bool LLParser::ParseDIObjCProperty(MDNode *&Result, bool IsDistinct) {
4617#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
OPTIONAL(name, MDStringField, );                                             \
OPTIONAL(file, MDField, );                                                   \
OPTIONAL(line, LineField, );                                                 \
OPTIONAL(setter, MDStringField, );                                           \
OPTIONAL(getter, MDStringField, );                                           \
OPTIONAL(attributes, MDUnsignedField, (0, UINT32_MAX(4294967295U)));                      \
OPTIONAL(type, MDField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4626#undef VISIT_MD_FIELDS

Result = GET_OR_DISTINCT(DIObjCProperty,(IsDistinct ? DIObjCProperty::getDistinct (Context, name.Val,
 file.Val, line.Val, setter.Val, getter.Val, attributes.Val, type
.Val) : DIObjCProperty::get (Context, name.Val, file.Val, line
.Val, setter.Val, getter.Val, attributes.Val, type.Val))
                         (Context, name.Val, file.Val, line.Val, setter.Val,(IsDistinct ? DIObjCProperty::getDistinct (Context, name.Val,
 file.Val, line.Val, setter.Val, getter.Val, attributes.Val, type
.Val) : DIObjCProperty::get (Context, name.Val, file.Val, line
.Val, setter.Val, getter.Val, attributes.Val, type.Val))
                          getter.Val, attributes.Val, type.Val))(IsDistinct ? DIObjCProperty::getDistinct (Context, name.Val,
 file.Val, line.Val, setter.Val, getter.Val, attributes.Val, type
.Val) : DIObjCProperty::get (Context, name.Val, file.Val, line
.Val, setter.Val, getter.Val, attributes.Val, type.Val));
return false;
4632}

4634/// ParseDIImportedEntity:
4635///   ::= !DIImportedEntity(tag: DW_TAG_imported_module, scope: !0, entity: !1,
4636///                         line: 7, name: "foo")
4637bool LLParser::ParseDIImportedEntity(MDNode *&Result, bool IsDistinct) {
4638#define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
REQUIRED(tag, DwarfTagField, );                                              \
REQUIRED(scope, MDField, );                                                  \
OPTIONAL(entity, MDField, );                                                 \
OPTIONAL(file, MDField, );                                                   \
OPTIONAL(line, LineField, );                                                 \
OPTIONAL(name, MDStringField, );
PARSE_MD_FIELDS()VISIT_MD_FIELDS(DECLARE_FIELD, DECLARE_FIELD) do { LocTy ClosingLoc
; if (ParseMDFieldsImpl([&]() -> bool { VISIT_MD_FIELDS
(PARSE_MD_FIELD, PARSE_MD_FIELD) return TokError(Twine("invalid field '"
) + Lex.getStrVal() + "'"); }, ClosingLoc)) return true; VISIT_MD_FIELDS
(NOP_FIELD, REQUIRE_FIELD) } while (false);
4646#undef VISIT_MD_FIELDS

Result = GET_OR_DISTINCT((IsDistinct ? DIImportedEntity::getDistinct (Context, tag.Val
, scope.Val, entity.Val, file.Val, line.Val, name.Val) : DIImportedEntity
::get (Context, tag.Val, scope.Val, entity.Val, file.Val, line
.Val, name.Val))
    DIImportedEntity,(IsDistinct ? DIImportedEntity::getDistinct (Context, tag.Val
, scope.Val, entity.Val, file.Val, line.Val, name.Val) : DIImportedEntity
::get (Context, tag.Val, scope.Val, entity.Val, file.Val, line
.Val, name.Val))
    (Context, tag.Val, scope.Val, entity.Val, file.Val, line.Val, name.Val))(IsDistinct ? DIImportedEntity::getDistinct (Context, tag.Val
, scope.Val, entity.Val, file.Val, line.Val, name.Val) : DIImportedEntity
::get (Context, tag.Val, scope.Val, entity.Val, file.Val, line
.Val, name.Val));
return false;
4652}

4654#undef PARSE_MD_FIELD
4655#undef NOP_FIELD
4656#undef REQUIRE_FIELD
4657#undef DECLARE_FIELD

4659/// ParseMetadataAsValue
4660///  ::= metadata i32 %local
4661///  ::= metadata i32 @global
4662///  ::= metadata i32 7
4663///  ::= metadata !0
4664///  ::= metadata !{...}
4665///  ::= metadata !"string"
4666bool LLParser::ParseMetadataAsValue(Value *&V, PerFunctionState &PFS) {
// Note: the type 'metadata' has already been parsed.
Metadata *MD;
if (ParseMetadata(MD, &PFS))
  return true;

V = MetadataAsValue::get(Context, MD);
return false;
4674}

4676/// ParseValueAsMetadata
4677///  ::= i32 %local
4678///  ::= i32 @global
4679///  ::= i32 7
4680bool LLParser::ParseValueAsMetadata(Metadata *&MD, const Twine &TypeMsg,
                                  PerFunctionState *PFS) {
Type *Ty;
LocTy Loc;
if (ParseType(Ty, TypeMsg, Loc))
  return true;
if (Ty->isMetadataTy())
  return Error(Loc, "invalid metadata-value-metadata roundtrip");

Value *V;
if (ParseValue(Ty, V, PFS))
  return true;

MD = ValueAsMetadata::get(V);
return false;
4695}

4697/// ParseMetadata
4698///  ::= i32 %local
4699///  ::= i32 @global
4700///  ::= i32 7
4701///  ::= !42
4702///  ::= !{...}
4703///  ::= !"string"
4704///  ::= !DILocation(...)
4705bool LLParser::ParseMetadata(Metadata *&MD, PerFunctionState *PFS) {
if (Lex.getKind() == lltok::MetadataVar) {
  MDNode *N;
  if (ParseSpecializedMDNode(N))
    return true;
  MD = N;
  return false;
}

// ValueAsMetadata:
// <type> <value>
if (Lex.getKind() != lltok::exclaim)
  return ParseValueAsMetadata(MD, "expected metadata operand", PFS);

// '!'.
assert(Lex.getKind() == lltok::exclaim && "Expected '!' here")(static_cast <bool> (Lex.getKind() == lltok::exclaim &&
 "Expected '!' here") ? void (0) : __assert_fail ("Lex.getKind() == lltok::exclaim && \"Expected '!' here\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 4720, __extension__ __PRETTY_FUNCTION__));
Lex.Lex();

// MDString:
//   ::= '!' STRINGCONSTANT
if (Lex.getKind() == lltok::StringConstant) {
  MDString *S;
  if (ParseMDString(S))
    return true;
  MD = S;
  return false;
}

// MDNode:
// !{ ... }
// !7
MDNode *N;
if (ParseMDNodeTail(N))
  return true;
MD = N;
return false;
4741}

4743//===----------------------------------------------------------------------===//
4744// Function Parsing.
4745//===----------------------------------------------------------------------===//

4747bool LLParser::ConvertValIDToValue(Type *Ty, ValID &ID, Value *&V,
                                 PerFunctionState *PFS, bool IsCall) {
if (Ty->isFunctionTy())
  return Error(ID.Loc, "functions are not values, refer to them as pointers");

switch (ID.Kind) {
case ValID::t_LocalID:
  if (!PFS) return Error(ID.Loc, "invalid use of function-local name");
  V = PFS->GetVal(ID.UIntVal, Ty, ID.Loc, IsCall);
  return V == nullptr;
case ValID::t_LocalName:
  if (!PFS) return Error(ID.Loc, "invalid use of function-local name");
  V = PFS->GetVal(ID.StrVal, Ty, ID.Loc, IsCall);
  return V == nullptr;
case ValID::t_InlineAsm: {
  if (!ID.FTy || !InlineAsm::Verify(ID.FTy, ID.StrVal2))
    return Error(ID.Loc, "invalid type for inline asm constraint string");
  V = InlineAsm::get(ID.FTy, ID.StrVal, ID.StrVal2, ID.UIntVal & 1,
                     (ID.UIntVal >> 1) & 1,
                     (InlineAsm::AsmDialect(ID.UIntVal >> 2)));
  return false;
}
case ValID::t_GlobalName:
  V = GetGlobalVal(ID.StrVal, Ty, ID.Loc);
  return V == nullptr;
case ValID::t_GlobalID:
  V = GetGlobalVal(ID.UIntVal, Ty, ID.Loc);
  return V == nullptr;
case ValID::t_APSInt:
  if (!Ty->isIntegerTy())
    return Error(ID.Loc, "integer constant must have integer type");
  ID.APSIntVal = ID.APSIntVal.extOrTrunc(Ty->getPrimitiveSizeInBits());
  V = ConstantInt::get(Context, ID.APSIntVal);
  return false;
case ValID::t_APFloat:
  if (!Ty->isFloatingPointTy() ||
      !ConstantFP::isValueValidForType(Ty, ID.APFloatVal))
    return Error(ID.Loc, "floating point constant invalid for type");

  // The lexer has no type info, so builds all half, float, and double FP
  // constants as double.  Fix this here.  Long double does not need this.
  if (&ID.APFloatVal.getSemantics() == &APFloat::IEEEdouble()) {
    bool Ignored;
    if (Ty->isHalfTy())
      ID.APFloatVal.convert(APFloat::IEEEhalf(), APFloat::rmNearestTiesToEven,
                            &Ignored);
    else if (Ty->isFloatTy())
      ID.APFloatVal.convert(APFloat::IEEEsingle(), APFloat::rmNearestTiesToEven,
                            &Ignored);
  }
  V = ConstantFP::get(Context, ID.APFloatVal);

  if (V->getType() != Ty)
    return Error(ID.Loc, "floating point constant does not have type '" +
                 getTypeString(Ty) + "'");

  return false;
case ValID::t_Null:
  if (!Ty->isPointerTy())
    return Error(ID.Loc, "null must be a pointer type");
  V = ConstantPointerNull::get(cast<PointerType>(Ty));
  return false;
case ValID::t_Undef:
  // FIXME: LabelTy should not be a first-class type.
  if (!Ty->isFirstClassType() || Ty->isLabelTy())
    return Error(ID.Loc, "invalid type for undef constant");
  V = UndefValue::get(Ty);
  return false;
case ValID::t_EmptyArray:
  if (!Ty->isArrayTy() || cast<ArrayType>(Ty)->getNumElements() != 0)
    return Error(ID.Loc, "invalid empty array initializer");
  V = UndefValue::get(Ty);
  return false;
case ValID::t_Zero:
  // FIXME: LabelTy should not be a first-class type.
  if (!Ty->isFirstClassType() || Ty->isLabelTy())
    return Error(ID.Loc, "invalid type for null constant");
  V = Constant::getNullValue(Ty);
  return false;
case ValID::t_None:
  if (!Ty->isTokenTy())
    return Error(ID.Loc, "invalid type for none constant");
  V = Constant::getNullValue(Ty);
  return false;
case ValID::t_Constant:
  if (ID.ConstantVal->getType() != Ty)
    return Error(ID.Loc, "constant expression type mismatch");

  V = ID.ConstantVal;
  return false;
case ValID::t_ConstantStruct:
case ValID::t_PackedConstantStruct:
  if (StructType *ST = dyn_cast<StructType>(Ty)) {
    if (ST->getNumElements() != ID.UIntVal)
      return Error(ID.Loc,
                   "initializer with struct type has wrong # elements");
    if (ST->isPacked() != (ID.Kind == ValID::t_PackedConstantStruct))
      return Error(ID.Loc, "packed'ness of initializer and type don't match");

    // Verify that the elements are compatible with the structtype.
    for (unsigned i = 0, e = ID.UIntVal; i != e; ++i)
      if (ID.ConstantStructElts[i]->getType() != ST->getElementType(i))
        return Error(ID.Loc, "element " + Twine(i) +
                  " of struct initializer doesn't match struct element type");

    V = ConstantStruct::get(
        ST, makeArrayRef(ID.ConstantStructElts.get(), ID.UIntVal));
  } else
    return Error(ID.Loc, "constant expression type mismatch");
  return false;
}
llvm_unreachable("Invalid ValID")::llvm::llvm_unreachable_internal("Invalid ValID", "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 4858);
4859}

4861bool LLParser::parseConstantValue(Type *Ty, Constant *&C) {
C = nullptr;
ValID ID;
auto Loc = Lex.getLoc();
if (ParseValID(ID, /*PFS=*/nullptr))
  return true;
switch (ID.Kind) {
case ValID::t_APSInt:
case ValID::t_APFloat:
case ValID::t_Undef:
case ValID::t_Constant:
case ValID::t_ConstantStruct:
case ValID::t_PackedConstantStruct: {
  Value *V;
  if (ConvertValIDToValue(Ty, ID, V, /*PFS=*/nullptr, /*IsCall=*/false))
    return true;
  assert(isa<Constant>(V) && "Expected a constant value")(static_cast <bool> (isa<Constant>(V) && "Expected a constant value"
) ? void (0) : __assert_fail ("isa<Constant>(V) && \"Expected a constant value\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 4877, __extension__ __PRETTY_FUNCTION__));
  C = cast<Constant>(V);
  return false;
}
case ValID::t_Null:
  C = Constant::getNullValue(Ty);
  return false;
default:
  return Error(Loc, "expected a constant value");
}
4887}

4889bool LLParser::ParseValue(Type *Ty, Value *&V, PerFunctionState *PFS) {
V = nullptr;
ValID ID;
return ParseValID(ID, PFS) ||
       ConvertValIDToValue(Ty, ID, V, PFS, /*IsCall=*/false);
4894}

4896bool LLParser::ParseTypeAndValue(Value *&V, PerFunctionState *PFS) {
Type *Ty = nullptr;
return ParseType(Ty) ||
       ParseValue(Ty, V, PFS);
4900}

4902bool LLParser::ParseTypeAndBasicBlock(BasicBlock *&BB, LocTy &Loc,
                                    PerFunctionState &PFS) {
Value *V;
Loc = Lex.getLoc();
if (ParseTypeAndValue(V, PFS)) return true;
if (!isa<BasicBlock>(V))
  return Error(Loc, "expected a basic block");
BB = cast<BasicBlock>(V);
return false;
4911}

4913/// FunctionHeader
4914///   ::= OptionalLinkage OptionalPreemptionSpecifier OptionalVisibility
4915///       OptionalCallingConv OptRetAttrs OptUnnamedAddr Type GlobalName
4916///       '(' ArgList ')' OptFuncAttrs OptSection OptionalAlign OptGC
4917///       OptionalPrefix OptionalPrologue OptPersonalityFn
4918bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) {
// Parse the linkage.
LocTy LinkageLoc = Lex.getLoc();
unsigned Linkage;
unsigned Visibility;
unsigned DLLStorageClass;
bool DSOLocal;
AttrBuilder RetAttrs;
unsigned CC;
bool HasLinkage;
Type *RetType = nullptr;
LocTy RetTypeLoc = Lex.getLoc();
if (ParseOptionalLinkage(Linkage, HasLinkage, Visibility, DLLStorageClass,
                         DSOLocal) ||
    ParseOptionalCallingConv(CC) || ParseOptionalReturnAttrs(RetAttrs) ||
    ParseType(RetType, RetTypeLoc, true /*void allowed*/))
  return true;

// Verify that the linkage is ok.
switch ((GlobalValue::LinkageTypes)Linkage) {
case GlobalValue::ExternalLinkage:
  break; // always ok.
case GlobalValue::ExternalWeakLinkage:
  if (isDefine)
    return Error(LinkageLoc, "invalid linkage for function definition");
  break;
case GlobalValue::PrivateLinkage:
case GlobalValue::InternalLinkage:
case GlobalValue::AvailableExternallyLinkage:
case GlobalValue::LinkOnceAnyLinkage:
case GlobalValue::LinkOnceODRLinkage:
case GlobalValue::WeakAnyLinkage:
case GlobalValue::WeakODRLinkage:
  if (!isDefine)
    return Error(LinkageLoc, "invalid linkage for function declaration");
  break;
case GlobalValue::AppendingLinkage:
case GlobalValue::CommonLinkage:
  return Error(LinkageLoc, "invalid function linkage type");
}

if (!isValidVisibilityForLinkage(Visibility, Linkage))
  return Error(LinkageLoc,
               "symbol with local linkage must have default visibility");

if (!FunctionType::isValidReturnType(RetType))
  return Error(RetTypeLoc, "invalid function return type");

LocTy NameLoc = Lex.getLoc();

std::string FunctionName;
if (Lex.getKind() == lltok::GlobalVar) {
  FunctionName = Lex.getStrVal();
} else if (Lex.getKind() == lltok::GlobalID) {     // @42 is ok.
  unsigned NameID = Lex.getUIntVal();

  if (NameID != NumberedVals.size())
    return TokError("function expected to be numbered '%" +
                    Twine(NumberedVals.size()) + "'");
} else {
  return TokError("expected function name");
}

Lex.Lex();

if (Lex.getKind() != lltok::lparen)
  return TokError("expected '(' in function argument list");

SmallVector<ArgInfo, 8> ArgList;
bool isVarArg;
AttrBuilder FuncAttrs;
std::vector<unsigned> FwdRefAttrGrps;
LocTy BuiltinLoc;
std::string Section;
unsigned Alignment;
std::string GC;
GlobalValue::UnnamedAddr UnnamedAddr = GlobalValue::UnnamedAddr::None;
Constant *Prefix = nullptr;
Constant *Prologue = nullptr;
Constant *PersonalityFn = nullptr;
Comdat *C;

if (ParseArgumentList(ArgList, isVarArg) ||
    ParseOptionalUnnamedAddr(UnnamedAddr) ||
    ParseFnAttributeValuePairs(FuncAttrs, FwdRefAttrGrps, false,
                               BuiltinLoc) ||
    (EatIfPresent(lltok::kw_section) &&
     ParseStringConstant(Section)) ||
    parseOptionalComdat(FunctionName, C) ||
    ParseOptionalAlignment(Alignment) ||
    (EatIfPresent(lltok::kw_gc) &&
     ParseStringConstant(GC)) ||
    (EatIfPresent(lltok::kw_prefix) &&
     ParseGlobalTypeAndValue(Prefix)) ||
    (EatIfPresent(lltok::kw_prologue) &&
     ParseGlobalTypeAndValue(Prologue)) ||
    (EatIfPresent(lltok::kw_personality) &&
     ParseGlobalTypeAndValue(PersonalityFn)))
  return true;

if (FuncAttrs.contains(Attribute::Builtin))
  return Error(BuiltinLoc, "'builtin' attribute not valid on function");

// If the alignment was parsed as an attribute, move to the alignment field.
if (FuncAttrs.hasAlignmentAttr()) {
  Alignment = FuncAttrs.getAlignment();
  FuncAttrs.removeAttribute(Attribute::Alignment);
}

// Okay, if we got here, the function is syntactically valid.  Convert types
// and do semantic checks.
std::vector<Type*> ParamTypeList;
SmallVector<AttributeSet, 8> Attrs;

for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
  ParamTypeList.push_back(ArgList[i].Ty);
  Attrs.push_back(ArgList[i].Attrs);
}

AttributeList PAL =
    AttributeList::get(Context, AttributeSet::get(Context, FuncAttrs),
                       AttributeSet::get(Context, RetAttrs), Attrs);

if (PAL.hasAttribute(1, Attribute::StructRet) && !RetType->isVoidTy())
  return Error(RetTypeLoc, "functions with 'sret' argument must return void");

FunctionType *FT =
  FunctionType::get(RetType, ParamTypeList, isVarArg);
PointerType *PFT = PointerType::getUnqual(FT);

Fn = nullptr;
if (!FunctionName.empty()) {
  // If this was a definition of a forward reference, remove the definition
  // from the forward reference table and fill in the forward ref.
  auto FRVI = ForwardRefVals.find(FunctionName);
  if (FRVI != ForwardRefVals.end()) {
    Fn = M->getFunction(FunctionName);
    if (!Fn)
      return Error(FRVI->second.second, "invalid forward reference to "
                   "function as global value!");
    if (Fn->getType() != PFT)
      return Error(FRVI->second.second, "invalid forward reference to "
                   "function '" + FunctionName + "' with wrong type!");

    ForwardRefVals.erase(FRVI);
  } else if ((Fn = M->getFunction(FunctionName))) {
    // Reject redefinitions.
    return Error(NameLoc, "invalid redefinition of function '" +
                 FunctionName + "'");
  } else if (M->getNamedValue(FunctionName)) {
    return Error(NameLoc, "redefinition of function '@" + FunctionName + "'");
  }

} else {
  // If this is a definition of a forward referenced function, make sure the
  // types agree.
  auto I = ForwardRefValIDs.find(NumberedVals.size());
  if (I != ForwardRefValIDs.end()) {
    Fn = cast<Function>(I->second.first);
    if (Fn->getType() != PFT)
      return Error(NameLoc, "type of definition and forward reference of '@" +
                   Twine(NumberedVals.size()) + "' disagree");
    ForwardRefValIDs.erase(I);
  }
}

if (!Fn)
  Fn = Function::Create(FT, GlobalValue::ExternalLinkage, FunctionName, M);
else // Move the forward-reference to the correct spot in the module.
  M->getFunctionList().splice(M->end(), M->getFunctionList(), Fn);

if (FunctionName.empty())
  NumberedVals.push_back(Fn);

Fn->setLinkage((GlobalValue::LinkageTypes)Linkage);
maybeSetDSOLocal(DSOLocal, *Fn);
Fn->setVisibility((GlobalValue::VisibilityTypes)Visibility);
Fn->setDLLStorageClass((GlobalValue::DLLStorageClassTypes)DLLStorageClass);
Fn->setCallingConv(CC);
Fn->setAttributes(PAL);
Fn->setUnnamedAddr(UnnamedAddr);
Fn->setAlignment(Alignment);
Fn->setSection(Section);
Fn->setComdat(C);
Fn->setPersonalityFn(PersonalityFn);
if (!GC.empty()) Fn->setGC(GC);
Fn->setPrefixData(Prefix);
Fn->setPrologueData(Prologue);
ForwardRefAttrGroups[Fn] = FwdRefAttrGrps;

// Add all of the arguments we parsed to the function.
Function::arg_iterator ArgIt = Fn->arg_begin();
for (unsigned i = 0, e = ArgList.size(); i != e; ++i, ++ArgIt) {
  // If the argument has a name, insert it into the argument symbol table.
  if (ArgList[i].Name.empty()) continue;

  // Set the name, if it conflicted, it will be auto-renamed.
  ArgIt->setName(ArgList[i].Name);

  if (ArgIt->getName() != ArgList[i].Name)
    return Error(ArgList[i].Loc, "redefinition of argument '%" +
                 ArgList[i].Name + "'");
}

if (isDefine)
  return false;

// Check the declaration has no block address forward references.
ValID ID;
if (FunctionName.empty()) {
  ID.Kind = ValID::t_GlobalID;
  ID.UIntVal = NumberedVals.size() - 1;
} else {
  ID.Kind = ValID::t_GlobalName;
  ID.StrVal = FunctionName;
}
auto Blocks = ForwardRefBlockAddresses.find(ID);
if (Blocks != ForwardRefBlockAddresses.end())
  return Error(Blocks->first.Loc,
               "cannot take blockaddress inside a declaration");
return false;
5139}

5141bool LLParser::PerFunctionState::resolveForwardRefBlockAddresses() {
ValID ID;
if (FunctionNumber == -1) {
  ID.Kind = ValID::t_GlobalName;
  ID.StrVal = F.getName();
} else {
  ID.Kind = ValID::t_GlobalID;
  ID.UIntVal = FunctionNumber;
}

auto Blocks = P.ForwardRefBlockAddresses.find(ID);
if (Blocks == P.ForwardRefBlockAddresses.end())
  return false;

for (const auto &I : Blocks->second) {
  const ValID &BBID = I.first;
  GlobalValue *GV = I.second;

  assert((BBID.Kind == ValID::t_LocalID || BBID.Kind == ValID::t_LocalName) &&(static_cast <bool> ((BBID.Kind == ValID::t_LocalID || BBID
.Kind == ValID::t_LocalName) && "Expected local id or name"
) ? void (0) : __assert_fail ("(BBID.Kind == ValID::t_LocalID || BBID.Kind == ValID::t_LocalName) && \"Expected local id or name\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 5160, __extension__ __PRETTY_FUNCTION__))
         "Expected local id or name")(static_cast <bool> ((BBID.Kind == ValID::t_LocalID || BBID
.Kind == ValID::t_LocalName) && "Expected local id or name"
) ? void (0) : __assert_fail ("(BBID.Kind == ValID::t_LocalID || BBID.Kind == ValID::t_LocalName) && \"Expected local id or name\""
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 5160, __extension__ __PRETTY_FUNCTION__));
  BasicBlock *BB;
  if (BBID.Kind == ValID::t_LocalName)
    BB = GetBB(BBID.StrVal, BBID.Loc);
  else
    BB = GetBB(BBID.UIntVal, BBID.Loc);
  if (!BB)
    return P.Error(BBID.Loc, "referenced value is not a basic block");

  GV->replaceAllUsesWith(BlockAddress::get(&F, BB));
  GV->eraseFromParent();
}

P.ForwardRefBlockAddresses.erase(Blocks);
return false;
5175}

5177/// ParseFunctionBody
5178///   ::= '{' BasicBlock+ UseListOrderDirective* '}'
5179bool LLParser::ParseFunctionBody(Function &Fn) {
if (Lex.getKind() != lltok::lbrace)
  return TokError("expected '{' in function body");
Lex.Lex();  // eat the {.

int FunctionNumber = -1;
if (!Fn.hasName()) FunctionNumber = NumberedVals.size()-1;

PerFunctionState PFS(*this, Fn, FunctionNumber);

// Resolve block addresses and allow basic blocks to be forward-declared
// within this function.
if (PFS.resolveForwardRefBlockAddresses())
  return true;
SaveAndRestore<PerFunctionState *> ScopeExit(BlockAddressPFS, &PFS);

// We need at least one basic block.
if (Lex.getKind() == lltok::rbrace || Lex.getKind() == lltok::kw_uselistorder)
  return TokError("function body requires at least one basic block");

while (Lex.getKind() != lltok::rbrace &&
       Lex.getKind() != lltok::kw_uselistorder)
  if (ParseBasicBlock(PFS)) return true;

while (Lex.getKind() != lltok::rbrace)
  if (ParseUseListOrder(&PFS))
    return true;

// Eat the }.
Lex.Lex();

// Verify function is ok.
return PFS.FinishFunction();
5212}

5214/// ParseBasicBlock
5215///   ::= LabelStr? Instruction*
5216bool LLParser::ParseBasicBlock(PerFunctionState &PFS) {
// If this basic block starts out with a name, remember it.
std::string Name;
LocTy NameLoc = Lex.getLoc();
if (Lex.getKind() == lltok::LabelStr) {
  Name = Lex.getStrVal();
  Lex.Lex();
}

BasicBlock *BB = PFS.DefineBB(Name, NameLoc);
if (!BB)
  return Error(NameLoc,
               "unable to create block named '" + Name + "'");

std::string NameStr;

// Parse the instructions in this block until we get a terminator.
Instruction *Inst;
do {
  // This instruction may have three possibilities for a name: a) none
  // specified, b) name specified "%foo =", c) number specified: "%4 =".
  LocTy NameLoc = Lex.getLoc();
  int NameID = -1;
  NameStr = "";

  if (Lex.getKind() == lltok::LocalVarID) {
    NameID = Lex.getUIntVal();
    Lex.Lex();
    if (ParseToken(lltok::equal, "expected '=' after instruction id"))
      return true;
  } else if (Lex.getKind() == lltok::LocalVar) {
    NameStr = Lex.getStrVal();
    Lex.Lex();
    if (ParseToken(lltok::equal, "expected '=' after instruction name"))
      return true;
  }

  switch (ParseInstruction(Inst, BB, PFS)) {
  default: llvm_unreachable("Unknown ParseInstruction result!")::llvm::llvm_unreachable_internal("Unknown ParseInstruction result!"
, "/build/llvm-toolchain-snapshot-7~svn326246/lib/AsmParser/LLParser.cpp"
, 5254);
  case InstError: return true;
  case InstNormal:
    BB->getInstList().push_back(Inst);

    // With a normal result, we check to see if the instruction is followed by
    // a comma and metadata.
    if (EatIfPresent(lltok::comma))
      if (ParseInstructionMetadata(*Inst))
        return true;
    break;
  case InstExtraComma:
    BB->getInstList().push_back(Inst);

    // If the instruction parser ate an extra comma at the end of it, it
    // *must* be followed by metadata.
    if (ParseInstructionMetadata(*Inst))
      return true;
    break;
  }

  // Set the name on the instruction.
  if (PFS.SetInstName(NameID, NameStr, NameLoc, Inst)) return true;
} while (!isa<TerminatorInst>(Inst));

return false;
5280}

5282//===----------------------------------------------------------------------===//
5283// Instruction Parsing.
5284//===----------------------------------------------------------------------===//

5286/// ParseInstruction - Parse one of the many different instructions.
5287///
5288int LLParser::ParseInstruction(Instruction *&Inst, BasicBlock *BB,
                             PerFunctionState &PFS) {
lltok::Kind Token = Lex.getKind();
if (Token == lltok::Eof)
  return TokError("found end of file when expecting more instructions");
LocTy Loc = Lex.getLoc();
unsigned KeywordVal = Lex.getUIntVal();
Lex.Lex();  // Eat the keyword.

switch (Token) {
default:                    return Error(Loc, "expected instruction opcode");
// Terminator Instructions.
case lltok::kw_unreachable: Inst = new UnreachableInst(Context); return false;
case lltok::kw_ret:         return ParseRet(Inst, BB, PFS);
case lltok::kw_br:          return ParseBr(Inst, PFS);
case lltok::kw_switch:      return ParseSwitch(Inst, PFS);
case lltok::kw_indirectbr:  return ParseIndirectBr(Inst, PFS);
case lltok::kw_invoke:      return ParseInvoke(Inst, PFS);
case lltok::kw_resume:      return ParseResume(Inst, PFS);
case lltok::kw_cleanupret:  return ParseCleanupRet(Inst, PFS);
case lltok::kw_catchret:    return ParseCatchRet(Inst, PFS);
case lltok::kw_catchswitch: return ParseCatchSwitch(Inst, PFS);
case lltok::kw_catchpad:    return ParseCatchPad(Inst, PFS);
case lltok::kw_cleanuppad:  return ParseCleanupPad(Inst, PFS);
// Binary Operators.
case lltok::kw_add:
case lltok::kw_sub:
case lltok::kw_mul:
case lltok::kw_shl: {
  bool NUW = EatIfPresent(lltok::kw_nuw);
  bool NSW = EatIfPresent(lltok::kw_nsw);
  if (!NUW) NUW = EatIfPresent(lltok::kw_nuw);

  if (ParseArithmetic(Inst, PFS, KeywordVal, 1)) return true;

  if (NUW) cast<BinaryOperator>(Inst)->setHasNoUnsignedWrap(true);
  if (NSW) cast<BinaryOperator>(Inst)->setHasNoSignedWrap(true);
  return false;
}
case lltok::kw_fadd:
case lltok::kw_fsub:
case lltok::kw_fmul:
case lltok::kw_fdiv:
case lltok::kw_frem: {
  FastMathFlags FMF = EatFastMathFlagsIfPresent();
  int Res = ParseArithmetic(Inst, PFS, KeywordVal, 2);
  if (Res != 0)
    return Res;
  if (FMF.any())
    Inst->setFastMathFlags(FMF);
  return 0;
}

case lltok::kw_sdiv:
case lltok::kw_udiv:
case lltok::kw_lshr:
case lltok::kw_ashr: {
  bool Exact = EatIfPresent(lltok::kw_exact);

  if (ParseArithmetic(Inst, PFS, KeywordVal, 1)) return true;
  if (Exact) cast<BinaryOperator>(Inst)->setIsExact(true);
  return false;
}

case lltok::kw_urem:
case lltok::kw_srem:   return ParseArithmetic(Inst, PFS, KeywordVal, 1);
case lltok::kw_and:
case lltok::kw_or:
case lltok::kw_xor:    return ParseLogical(Inst, PFS, KeywordVal);
case lltok::kw_icmp:   return ParseCompare(Inst, PFS, KeywordVal);
case lltok::kw_fcmp: {
  FastMathFlags FMF = EatFastMathFlagsIfPresent();
  int Res = ParseCompare(Inst, PFS, KeywordVal);
  if (Res != 0)
    return Res;
  if (FMF.any())
    Inst->setFastMathFlags(FMF);
  return 0;
}

// Casts.
case lltok::kw_trunc:
case lltok::kw_zext:
case lltok::kw_sext:
case lltok::kw_fptrunc:
case lltok::kw_fpext:
case lltok::kw_bitcast:
case lltok::kw_addrspacecast:
case lltok::kw_uitofp:
case lltok::kw_sitofp:
case lltok::kw_fptoui:
case lltok::kw_fptosi:
case lltok::kw_inttoptr:
case lltok::kw_ptrtoint:       return ParseCast(Inst, PFS, KeywordVal);
// Other.
case lltok::kw_select:         return ParseSelect(Inst, PFS);
case lltok::kw_va_arg:         return ParseVA_Arg(Inst, PFS);
case lltok::kw_extractelement: return ParseExtractElement(Inst, PFS);
case lltok::kw_insertelement:  return ParseInsertElement(Inst, PFS);
case lltok::kw_shufflevector:  return ParseShuffleVector(Inst, PFS);
case lltok::kw_phi:            return ParsePHI(Inst, PFS);
case lltok::kw_landingpad:     return ParseLandingPad(Inst, PFS);
// Call.
case lltok::kw_call:     return ParseCall(Inst, PFS, CallInst::TCK_None);
case lltok::kw_tail:     return ParseCall(Inst, PFS, CallInst::TCK_Tail);
case lltok::kw_musttail: return ParseCall(Inst, PFS, CallInst::TCK_MustTail);
case lltok::kw_notail:   return ParseCall(Inst, PFS, CallInst::TCK_NoTail);
// Memory.
case lltok::kw_alloca:         return ParseAlloc(Inst, PFS);
case lltok::kw_load:           return ParseLoad(Inst, PFS);
case lltok::kw_store:          return ParseStore(Inst, PFS);
case lltok::kw_cmpxchg:        return ParseCmpXchg(Inst, PFS);
case lltok::kw_atomicrmw:      return ParseAtomicRMW(Inst, PFS);
case lltok::kw_fence:          return ParseFence(Inst, PFS);
case lltok::kw_getelementptr: return ParseGetElementPtr(Inst, PFS);
case lltok::kw_extractvalue:  return ParseExtractValue(Inst, PFS);
case lltok::kw_insertvalue:   return ParseInsertValue(Inst, PFS);
}
5406}

5408/// ParseCmpPredicate - Parse an integer or fp predicate, based on Kind.
5409bool LLParser::ParseCmpPredicate(unsigned &P, unsigned Opc) {
if (Opc == Instruction::FCmp) {
  switch (Lex.getKind()) {
  default: return TokError("expected fcmp predicate (e.g. 'oeq')");
  case lltok::kw_oeq: P = CmpInst::FCMP_OEQ; break;
  case lltok::kw_one: P = CmpInst::FCMP_ONE; break;
  case lltok::kw_olt: P = CmpInst::FCMP_OLT; break;
  case lltok::kw_ogt: P = CmpInst::FCMP_OGT; break;
  case lltok::kw_ole: P = CmpInst::FCMP_OLE; break;
  case lltok::kw_oge: P = CmpInst::FCMP_OGE; break;
  case lltok::kw_ord: P = CmpInst::FCMP_ORD; break;
  case lltok::kw_uno: P = CmpInst::FCMP_UNO; break;
  case lltok::kw_ueq: P = CmpInst::FCMP_UEQ; break;
  case lltok::kw_une: P = CmpInst::FCMP_UNE; break;
  case lltok::kw_ult: P = CmpInst::FCMP_ULT; break;
  case lltok::kw_ugt: P = CmpInst::FCMP_UGT; break;
  case lltok::kw_ule: P = CmpInst::FCMP_ULE; break;
  case lltok::kw_uge: P = CmpInst::FCMP_UGE; break;
  case lltok::kw_true: P = CmpInst::FCMP_TRUE; break;
  case lltok::kw_false: P = CmpInst::FCMP_FALSE; break;
  }
} else {
  switch (Lex.getKind()) {
  default: return TokError("expected icmp predicate (e.g. 'eq')");
  case lltok::kw_eq:  P = CmpInst::ICMP_EQ; break;
  case lltok::kw_ne:  P = CmpInst::ICMP_NE; break;
  case lltok::kw_slt: P = CmpInst::ICMP_SLT; break;
  case lltok::kw_sgt: P = CmpInst::ICMP_SGT; break;
  case lltok::kw_sle: P = CmpInst::ICMP_SLE; break;
  case lltok::kw_sge: P = CmpInst::ICMP_SGE; break;
  case lltok::kw_ult: P = CmpInst::ICMP_ULT; break;
  case lltok::kw_ugt: P = CmpInst::ICMP_UGT; break;
  case lltok::kw_ule: P = CmpInst::ICMP_ULE; break;
  case lltok::kw_uge: P = CmpInst::ICMP_UGE; break;
  }
}
Lex.Lex();
return false;
5447}

5449//===----------------------------------------------------------------------===//
5450// Terminator Instructions.
5451//===----------------------------------------------------------------------===//

5453/// ParseRet - Parse a return instruction.
5454///   ::= 'ret' void (',' !dbg, !1)*
5455///   ::= 'ret' TypeAndValue (',' !dbg, !1)*
5456bool LLParser::ParseRet(Instruction *&Inst, BasicBlock *BB,
                      PerFunctionState &PFS) {
SMLoc TypeLoc = Lex.getLoc();
Type *Ty = nullptr;
if (ParseType(Ty, true /*void allowed*/)) return true;

Type *ResType = PFS.getFunction().getReturnType();

if (Ty->isVoidTy()) {
  if (!ResType->isVoidTy())
    return Error(TypeLoc, "value doesn't match function result type '" +
                 getTypeString(ResType) + "'");

  Inst = ReturnInst::Create(Context);
  return false;
}

Value *RV;
if (ParseValue(Ty, RV, PFS)) return true;

if (ResType != RV->getType())
  return Error(TypeLoc, "value doesn't match function result type '" +
               getTypeString(ResType) + "'");

Inst = ReturnInst::Create(Context, RV);
return false;
5482}

5484/// ParseBr
5485///   ::= 'br' TypeAndValue
5486///   ::= 'br' TypeAndValue ',' TypeAndValue ',' TypeAndValue
5487bool LLParser::ParseBr(Instruction *&Inst, PerFunctionState &PFS) {
LocTy Loc, Loc2;
Value *Op0;
BasicBlock *Op1, *Op2;
if (ParseTypeAndValue(Op0, Loc, PFS)) return true;

if (BasicBlock *BB = dyn_cast<BasicBlock>(Op0)) {
  Inst = BranchInst::Create(BB);
  return false;
}

if (Op0->getType() != Type::getInt1Ty(Context))
  return Error(Loc, "branch condition must have 'i1' type");

if (ParseToken(lltok::comma, "expected ',' after branch condition") ||
    ParseTypeAndBasicBlock(Op1, Loc, PFS) ||
    ParseToken(lltok::comma, "expected ',' after true destination") ||
    ParseTypeAndBasicBlock(Op2, Loc2, PFS))
  return true;

Inst = BranchInst::Create(Op1, Op2, Op0);
return false;
5509}

5511/// ParseSwitch
5512///  Instruction
5513///    ::= 'switch' TypeAndValue ',' TypeAndValue '[' JumpTable ']'
5514///  JumpTable
5515///    ::= (TypeAndValue ',' TypeAndValue)*
5516bool LLParser::ParseSwitch(Instruction *&Inst, PerFunctionState &PFS) {
LocTy CondLoc, BBLoc;
Value *Cond;
BasicBlock *DefaultBB;
if (ParseTypeAndValue(Cond, CondLoc, PFS) ||
    ParseToken(lltok::comma, "expected ',' after switch condition") ||
    ParseTypeAndBasicBlock(DefaultBB, BBLoc, PFS) ||
    ParseToken(lltok::lsquare, "expected '[' with switch table"))
  return true;

if (!Cond->getType()->isIntegerTy())
  return Error(CondLoc, "switch condition must have integer type");

// Parse the jump table pairs.
SmallPtrSet<Value*, 32> SeenCases;
SmallVector<std::pair<ConstantInt*, BasicBlock*>, 32> Table;
while (Lex.getKind() != lltok::rsquare) {
  Value *Constant;
  BasicBlock *DestBB;

  if (ParseTypeAndValue(Constant, CondLoc, PFS) ||
      ParseToken(lltok::comma, "expected ',' after case value") ||
      ParseTypeAndBasicBlock(DestBB, PFS))
    return true;

  if (!SeenCases.insert(Constant).second)
    return Error(CondLoc, "duplicate case value in switch");
  if (!isa<ConstantInt>(Constant))
    return Error(CondLoc, "case value is not a constant integer");

  Table.push_back(std::make_pair(cast<ConstantInt>(Constant), DestBB));
}

Lex.Lex();  // Eat the ']'.

SwitchInst *SI = SwitchInst::Create(Cond, DefaultBB, Table.size());
for (unsigned i = 0, e = Table.size(); i != e; ++i)
  SI->addCase(Table[i].first, Table[i].second);
Inst = SI;
return false;
5556}

5558/// ParseIndirectBr
5559///  Instruction
5560///    ::= 'indirectbr' TypeAndValue ',' '[' LabelList ']'
5561bool LLParser::ParseIndirectBr(Instruction *&Inst, PerFunctionState &PFS) {
LocTy AddrLoc;
Value *Address;
if (ParseTypeAndValue(Address, AddrLoc, PFS) ||
    ParseToken(lltok::comma, "expected ',' after indirectbr address") ||
    ParseToken(lltok::lsquare, "expected '[' with indirectbr"))
  return true;

if (!Address->getType()->isPointerTy())
  return Error(AddrLoc, "indirectbr address must have pointer type");

// Parse the destination list.
SmallVector<BasicBlock*, 16> DestList;

if (Lex.getKind() != lltok::rsquare) {
  BasicBlock *DestBB;
  if (ParseTypeAndBasicBlock(DestBB, PFS))
    return true;
  DestList.push_back(DestBB);

  while (EatIfPresent(lltok::comma)) {
    if (ParseTypeAndBasicBlock(DestBB, PFS))
      return true;
    DestList.push_back(DestBB);
  }
}

if (ParseToken(lltok::rsquare, "expected ']' at end of block list"))
  return true;

IndirectBrInst *IBI = IndirectBrInst::Create(Address, DestList.size());
for (unsigned i = 0, e = DestList.size(); i != e; ++i)
  IBI->addDestination(DestList[i]);
Inst = IBI;
return false;
5596}

5598/// ParseInvoke
5599///   ::= 'invoke' OptionalCallingConv OptionalAttrs Type Value ParamList
5600///       OptionalAttrs 'to' TypeAndValue 'unwind' TypeAndValue
5601bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) {
LocTy CallLoc = Lex.getLoc();
AttrBuilder RetAttrs, FnAttrs;
std::vector<unsigned> FwdRefAttrGrps;
LocTy NoBuiltinLoc;
unsigned CC;
Type *RetType = nullptr;
LocTy RetTypeLoc;
ValID CalleeID;
SmallVector<ParamInfo, 16> ArgList;
SmallVector<OperandBundleDef, 2> BundleList;

BasicBlock *NormalBB, *UnwindBB;
if (ParseOptionalCallingConv(CC) || ParseOptionalReturnAttrs(RetAttrs) ||
    ParseType(RetType, RetTypeLoc, true /*void allowed*/) ||
    ParseValID(CalleeID) || ParseParameterList(ArgList, PFS) ||
    ParseFnAttributeValuePairs(FnAttrs, FwdRefAttrGrps, false,
                               NoBuiltinLoc) ||
    ParseOptionalOperandBundles(BundleList, PFS) ||
    ParseToken(lltok::kw_to, "expected 'to' in invoke") ||
    ParseTypeAndBasicBlock(NormalBB, PFS) ||
    ParseToken(lltok::kw_unwind, "expected 'unwind' in invoke") ||
    ParseTypeAndBasicBlock(UnwindBB, PFS))
  return true;

// If RetType is a non-function pointer type, then this is the short syntax
// for the call, which means that RetType is just the return type.  Infer the
// rest of the function argument types from the arguments that are present.
FunctionType *Ty = dyn_cast<FunctionType>(RetType);
if (!Ty) {
  // Pull out the types of all of the arguments...
  std::vector<Type*> ParamTypes;
  for (unsigned i = 0, e = ArgList.size(); i != e; ++i)
    ParamTypes.push_back(ArgList[i].V->getType());

  if (!FunctionType::isValidReturnType(RetType))
    return Error(RetTypeLoc, "Invalid result type for LLVM function");

  Ty = FunctionType::get(RetType, ParamTypes, false);
}

CalleeID.FTy = Ty;

// Look up the callee.
Value *Callee;
if (ConvertValIDToValue(PointerType::getUnqual(Ty), CalleeID, Callee, &PFS,
                        /*IsCall=*/true))
  return true;

// Set up the Attribute for the function.
SmallVector<Value *, 8> Args;
SmallVector<AttributeSet, 8> ArgAttrs;

// Loop through FunctionType's arguments and ensure they are specified
// correctly.  Also, gather any parameter attributes.
FunctionType::param_iterator I = Ty->param_begin();
FunctionType::param_iterator E = Ty->param_end();
for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
  Type *ExpectedTy = nullptr;
  if (I != E) {
    ExpectedTy = *I++;
  } else if (!Ty->isVarArg()) {
    return Error(ArgList[i].Loc, "too many arguments specified");
  }

  if (ExpectedTy && ExpectedTy != ArgList[i].V->getType())
    return Error(ArgList[i].Loc, "argument is not of expected type '" +
                 getTypeString(ExpectedTy) + "'");
  Args.push_back(ArgList[i].V);
  ArgAttrs.push_back(ArgList[i].Attrs);
}

if (I != E)
  return Error(CallLoc, "not enough parameters specified for call");
5675