/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp

Bug Summary

File:	lib/MC/MCParser/AsmParser.cpp
Warning:	line 2776, column 7 Branch condition evaluates to 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 AsmParser.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~svn338205/build-llvm/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/include -I /build/llvm-toolchain-snapshot-7~svn338205/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/x86_64-linux-gnu/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/x86_64-linux-gnu/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/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/lib/gcc/x86_64-linux-gnu/8/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-class-memaccess -Wno-comment -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/lib/MC/MCParser -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-07-29-043837-17923-1 -x c++ /build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp -faddrsig
1//===- AsmParser.cpp - Parser for Assembly Files --------------------------===//
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 class implements the parser for assembly files.
11//
12//===----------------------------------------------------------------------===//

14#include "llvm/ADT/APFloat.h"
15#include "llvm/ADT/APInt.h"
16#include "llvm/ADT/ArrayRef.h"
17#include "llvm/ADT/None.h"
18#include "llvm/ADT/STLExtras.h"
19#include "llvm/ADT/SmallString.h"
20#include "llvm/ADT/SmallVector.h"
21#include "llvm/ADT/StringExtras.h"
22#include "llvm/ADT/StringMap.h"
23#include "llvm/ADT/StringRef.h"
24#include "llvm/ADT/Twine.h"
25#include "llvm/BinaryFormat/Dwarf.h"
26#include "llvm/MC/MCAsmInfo.h"
27#include "llvm/MC/MCCodeView.h"
28#include "llvm/MC/MCContext.h"
29#include "llvm/MC/MCDirectives.h"
30#include "llvm/MC/MCDwarf.h"
31#include "llvm/MC/MCExpr.h"
32#include "llvm/MC/MCInstPrinter.h"
33#include "llvm/MC/MCInstrDesc.h"
34#include "llvm/MC/MCInstrInfo.h"
35#include "llvm/MC/MCObjectFileInfo.h"
36#include "llvm/MC/MCParser/AsmCond.h"
37#include "llvm/MC/MCParser/AsmLexer.h"
38#include "llvm/MC/MCParser/MCAsmLexer.h"
39#include "llvm/MC/MCParser/MCAsmParser.h"
40#include "llvm/MC/MCParser/MCAsmParserExtension.h"
41#include "llvm/MC/MCParser/MCAsmParserUtils.h"
42#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
43#include "llvm/MC/MCParser/MCTargetAsmParser.h"
44#include "llvm/MC/MCRegisterInfo.h"
45#include "llvm/MC/MCSection.h"
46#include "llvm/MC/MCStreamer.h"
47#include "llvm/MC/MCSymbol.h"
48#include "llvm/MC/MCTargetOptions.h"
49#include "llvm/MC/MCValue.h"
50#include "llvm/Support/Casting.h"
51#include "llvm/Support/CommandLine.h"
52#include "llvm/Support/ErrorHandling.h"
53#include "llvm/Support/MD5.h"
54#include "llvm/Support/MathExtras.h"
55#include "llvm/Support/MemoryBuffer.h"
56#include "llvm/Support/SMLoc.h"
57#include "llvm/Support/SourceMgr.h"
58#include "llvm/Support/raw_ostream.h"
59#include <algorithm>
60#include <cassert>
61#include <cctype>
62#include <climits>
63#include <cstddef>
64#include <cstdint>
65#include <deque>
66#include <memory>
67#include <sstream>
68#include <string>
69#include <tuple>
70#include <utility>
71#include <vector>

73using namespace llvm;

75MCAsmParserSemaCallback::~MCAsmParserSemaCallback() = default;

77static cl::opt<unsigned> AsmMacroMaxNestingDepth(
   "asm-macro-max-nesting-depth", cl::init(20), cl::Hidden,
   cl::desc("The maximum nesting depth allowed for assembly macros."));

81namespace {

83/// Helper types for tracking macro definitions.
84typedef std::vector<AsmToken> MCAsmMacroArgument;
85typedef std::vector<MCAsmMacroArgument> MCAsmMacroArguments;

87/// Helper class for storing information about an active macro
88/// instantiation.
89struct MacroInstantiation {
/// The location of the instantiation.
SMLoc InstantiationLoc;

/// The buffer where parsing should resume upon instantiation completion.
int ExitBuffer;

/// The location where parsing should resume upon instantiation completion.
SMLoc ExitLoc;

/// The depth of TheCondStack at the start of the instantiation.
size_t CondStackDepth;

102public:
MacroInstantiation(SMLoc IL, int EB, SMLoc EL, size_t CondStackDepth);
104};

106struct ParseStatementInfo {
/// The parsed operands from the last parsed statement.
SmallVector<std::unique_ptr<MCParsedAsmOperand>, 8> ParsedOperands;

/// The opcode from the last parsed instruction.
unsigned Opcode = ~0U;

/// Was there an error parsing the inline assembly?
bool ParseError = false;

SmallVectorImpl<AsmRewrite> *AsmRewrites = nullptr;

ParseStatementInfo() = delete;
ParseStatementInfo(SmallVectorImpl<AsmRewrite> *rewrites)
  : AsmRewrites(rewrites) {}
121};

123/// The concrete assembly parser instance.
124class AsmParser : public MCAsmParser {
125private:
AsmLexer Lexer;
MCContext &Ctx;
MCStreamer &Out;
const MCAsmInfo &MAI;
SourceMgr &SrcMgr;
SourceMgr::DiagHandlerTy SavedDiagHandler;
void *SavedDiagContext;
std::unique_ptr<MCAsmParserExtension> PlatformParser;

/// This is the current buffer index we're lexing from as managed by the
/// SourceMgr object.
unsigned CurBuffer;

AsmCond TheCondState;
std::vector<AsmCond> TheCondStack;

/// maps directive names to handler methods in parser
/// extensions. Extensions register themselves in this map by calling
/// addDirectiveHandler.
StringMap<ExtensionDirectiveHandler> ExtensionDirectiveMap;

/// Stack of active macro instantiations.
std::vector<MacroInstantiation*> ActiveMacros;

/// List of bodies of anonymous macros.
std::deque<MCAsmMacro> MacroLikeBodies;

/// Boolean tracking whether macro substitution is enabled.
unsigned MacrosEnabledFlag : 1;

/// Keeps track of how many .macro's have been instantiated.
unsigned NumOfMacroInstantiations;

/// The values from the last parsed cpp hash file line comment if any.
struct CppHashInfoTy {
  StringRef Filename;
  int64_t LineNumber = 0;
  SMLoc Loc;
  unsigned Buf = 0;
};
CppHashInfoTy CppHashInfo;

/// List of forward directional labels for diagnosis at the end.
SmallVector<std::tuple<SMLoc, CppHashInfoTy, MCSymbol *>, 4> DirLabels;

/// AssemblerDialect. ~OU means unset value and use value provided by MAI.
unsigned AssemblerDialect = ~0U;

/// is Darwin compatibility enabled?
bool IsDarwin = false;

/// Are we parsing ms-style inline assembly?
bool ParsingInlineAsm = false;

/// Did we already inform the user about inconsistent MD5 usage?
bool ReportedInconsistentMD5 = false;

183public:
AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
          const MCAsmInfo &MAI, unsigned CB);
AsmParser(const AsmParser &) = delete;
AsmParser &operator=(const AsmParser &) = delete;
~AsmParser() override;

bool Run(bool NoInitialTextSection, bool NoFinalize = false) override;

void addDirectiveHandler(StringRef Directive,
                         ExtensionDirectiveHandler Handler) override {
  ExtensionDirectiveMap[Directive] = Handler;
}

void addAliasForDirective(StringRef Directive, StringRef Alias) override {
  DirectiveKindMap[Directive] = DirectiveKindMap[Alias];
}

/// @name MCAsmParser Interface
/// {

SourceMgr &getSourceManager() override { return SrcMgr; }
MCAsmLexer &getLexer() override { return Lexer; }
MCContext &getContext() override { return Ctx; }
MCStreamer &getStreamer() override { return Out; }

CodeViewContext &getCVContext() { return Ctx.getCVContext(); }

unsigned getAssemblerDialect() override {
  if (AssemblerDialect == ~0U)
    return MAI.getAssemblerDialect();
  else
    return AssemblerDialect;
}
void setAssemblerDialect(unsigned i) override {
  AssemblerDialect = i;
}

void Note(SMLoc L, const Twine &Msg, SMRange Range = None) override;
bool Warning(SMLoc L, const Twine &Msg, SMRange Range = None) override;
bool printError(SMLoc L, const Twine &Msg, SMRange Range = None) override;

const AsmToken &Lex() override;

void setParsingInlineAsm(bool V) override {
  ParsingInlineAsm = V;
  Lexer.setParsingMSInlineAsm(V);
}
bool isParsingInlineAsm() override { return ParsingInlineAsm; }

bool parseMSInlineAsm(void *AsmLoc, std::string &AsmString,
                      unsigned &NumOutputs, unsigned &NumInputs,
                      SmallVectorImpl<std::pair<void *,bool>> &OpDecls,
                      SmallVectorImpl<std::string> &Constraints,
                      SmallVectorImpl<std::string> &Clobbers,
                      const MCInstrInfo *MII, const MCInstPrinter *IP,
                      MCAsmParserSemaCallback &SI) override;

bool parseExpression(const MCExpr *&Res);
bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) override;
bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
bool parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
                           SMLoc &EndLoc) override;
bool parseAbsoluteExpression(int64_t &Res) override;

/// Parse a floating point expression using the float \p Semantics
/// and set \p Res to the value.
bool parseRealValue(const fltSemantics &Semantics, APInt &Res);

/// Parse an identifier or string (as a quoted identifier)
/// and set \p Res to the identifier contents.
bool parseIdentifier(StringRef &Res) override;
void eatToEndOfStatement() override;

bool checkForValidSection() override;

/// }

262private:
bool isAltmacroString(SMLoc &StrLoc, SMLoc &EndLoc);
void altMacroString(StringRef AltMacroStr, std::string &Res);
bool parseStatement(ParseStatementInfo &Info,
                    MCAsmParserSemaCallback *SI);
bool parseCurlyBlockScope(SmallVectorImpl<AsmRewrite>& AsmStrRewrites);
bool parseCppHashLineFilenameComment(SMLoc L);

void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body,
                      ArrayRef<MCAsmMacroParameter> Parameters);
bool expandMacro(raw_svector_ostream &OS, StringRef Body,
                 ArrayRef<MCAsmMacroParameter> Parameters,
                 ArrayRef<MCAsmMacroArgument> A, bool EnableAtPseudoVariable,
                 SMLoc L);

/// Are macros enabled in the parser?
bool areMacrosEnabled() {return MacrosEnabledFlag;}

/// Control a flag in the parser that enables or disables macros.
void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;}

/// Are we inside a macro instantiation?
bool isInsideMacroInstantiation() {return !ActiveMacros.empty();}

/// Handle entry to macro instantiation.
///
/// \param M The macro.
/// \param NameLoc Instantiation location.
bool handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc);

/// Handle exit from macro instantiation.
void handleMacroExit();

/// Extract AsmTokens for a macro argument.
bool parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg);

/// Parse all macro arguments for a given macro.
bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A);

void printMacroInstantiations();
void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg,
                  SMRange Range = None) const {
  ArrayRef<SMRange> Ranges(Range);
  SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges);
}
static void DiagHandler(const SMDiagnostic &Diag, void *Context);

/// Should we emit DWARF describing this assembler source?  (Returns false if
/// the source has .file directives, which means we don't want to generate
/// info describing the assembler source itself.)
bool enabledGenDwarfForAssembly();

/// Enter the specified file. This returns true on failure.
bool enterIncludeFile(const std::string &Filename);

/// Process the specified file for the .incbin directive.
/// This returns true on failure.
bool processIncbinFile(const std::string &Filename, int64_t Skip = 0,
                       const MCExpr *Count = nullptr, SMLoc Loc = SMLoc());

/// Reset the current lexer position to that given by \p Loc. The
/// current token is not set; clients should ensure Lex() is called
/// subsequently.
///
/// \param InBuffer If not 0, should be the known buffer id that contains the
/// location.
void jumpToLoc(SMLoc Loc, unsigned InBuffer = 0);

/// Parse up to the end of statement and a return the contents from the
/// current token until the end of the statement; the current token on exit
/// will be either the EndOfStatement or EOF.
StringRef parseStringToEndOfStatement() override;

/// Parse until the end of a statement or a comma is encountered,
/// return the contents from the current token up to the end or comma.
StringRef parseStringToComma();

bool parseAssignment(StringRef Name, bool allow_redef,
                     bool NoDeadStrip = false, bool AllowExtendedExpr = false);

unsigned getBinOpPrecedence(AsmToken::TokenKind K,
                            MCBinaryExpr::Opcode &Kind);

bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc);
bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc);

bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc);

bool parseCVFunctionId(int64_t &FunctionId, StringRef DirectiveName);
bool parseCVFileId(int64_t &FileId, StringRef DirectiveName);

// Generic (target and platform independent) directive parsing.
enum DirectiveKind {
  DK_NO_DIRECTIVE, // Placeholder
  DK_SET,
  DK_EQU,
  DK_EQUIV,
  DK_ASCII,
  DK_ASCIZ,
  DK_STRING,
  DK_BYTE,
  DK_SHORT,
  DK_RELOC,
  DK_VALUE,
  DK_2BYTE,
  DK_LONG,
  DK_INT,
  DK_4BYTE,
  DK_QUAD,
  DK_8BYTE,
  DK_OCTA,
  DK_DC,
  DK_DC_A,
  DK_DC_B,
  DK_DC_D,
  DK_DC_L,
  DK_DC_S,
  DK_DC_W,
  DK_DC_X,
  DK_DCB,
  DK_DCB_B,
  DK_DCB_D,
  DK_DCB_L,
  DK_DCB_S,
  DK_DCB_W,
  DK_DCB_X,
  DK_DS,
  DK_DS_B,
  DK_DS_D,
  DK_DS_L,
  DK_DS_P,
  DK_DS_S,
  DK_DS_W,
  DK_DS_X,
  DK_SINGLE,
  DK_FLOAT,
  DK_DOUBLE,
  DK_ALIGN,
  DK_ALIGN32,
  DK_BALIGN,
  DK_BALIGNW,
  DK_BALIGNL,
  DK_P2ALIGN,
  DK_P2ALIGNW,
  DK_P2ALIGNL,
  DK_ORG,
  DK_FILL,
  DK_ENDR,
  DK_BUNDLE_ALIGN_MODE,
  DK_BUNDLE_LOCK,
  DK_BUNDLE_UNLOCK,
  DK_ZERO,
  DK_EXTERN,
  DK_GLOBL,
  DK_GLOBAL,
  DK_LAZY_REFERENCE,
  DK_NO_DEAD_STRIP,
  DK_SYMBOL_RESOLVER,
  DK_PRIVATE_EXTERN,
  DK_REFERENCE,
  DK_WEAK_DEFINITION,
  DK_WEAK_REFERENCE,
  DK_WEAK_DEF_CAN_BE_HIDDEN,
  DK_COMM,
  DK_COMMON,
  DK_LCOMM,
  DK_ABORT,
  DK_INCLUDE,
  DK_INCBIN,
  DK_CODE16,
  DK_CODE16GCC,
  DK_REPT,
  DK_IRP,
  DK_IRPC,
  DK_IF,
  DK_IFEQ,
  DK_IFGE,
  DK_IFGT,
  DK_IFLE,
  DK_IFLT,
  DK_IFNE,
  DK_IFB,
  DK_IFNB,
  DK_IFC,
  DK_IFEQS,
  DK_IFNC,
  DK_IFNES,
  DK_IFDEF,
  DK_IFNDEF,
  DK_IFNOTDEF,
  DK_ELSEIF,
  DK_ELSE,
  DK_ENDIF,
  DK_SPACE,
  DK_SKIP,
  DK_FILE,
  DK_LINE,
  DK_LOC,
  DK_STABS,
  DK_CV_FILE,
  DK_CV_FUNC_ID,
  DK_CV_INLINE_SITE_ID,
  DK_CV_LOC,
  DK_CV_LINETABLE,
  DK_CV_INLINE_LINETABLE,
  DK_CV_DEF_RANGE,
  DK_CV_STRINGTABLE,
  DK_CV_FILECHECKSUMS,
  DK_CV_FILECHECKSUM_OFFSET,
  DK_CV_FPO_DATA,
  DK_CFI_SECTIONS,
  DK_CFI_STARTPROC,
  DK_CFI_ENDPROC,
  DK_CFI_DEF_CFA,
  DK_CFI_DEF_CFA_OFFSET,
  DK_CFI_ADJUST_CFA_OFFSET,
  DK_CFI_DEF_CFA_REGISTER,
  DK_CFI_OFFSET,
  DK_CFI_REL_OFFSET,
  DK_CFI_PERSONALITY,
  DK_CFI_LSDA,
  DK_CFI_REMEMBER_STATE,
  DK_CFI_RESTORE_STATE,
  DK_CFI_SAME_VALUE,
  DK_CFI_RESTORE,
  DK_CFI_ESCAPE,
  DK_CFI_RETURN_COLUMN,
  DK_CFI_SIGNAL_FRAME,
  DK_CFI_UNDEFINED,
  DK_CFI_REGISTER,
  DK_CFI_WINDOW_SAVE,
  DK_MACROS_ON,
  DK_MACROS_OFF,
  DK_ALTMACRO,
  DK_NOALTMACRO,
  DK_MACRO,
  DK_EXITM,
  DK_ENDM,
  DK_ENDMACRO,
  DK_PURGEM,
  DK_SLEB128,
  DK_ULEB128,
  DK_ERR,
  DK_ERROR,
  DK_WARNING,
  DK_PRINT,
  DK_ADDRSIG,
  DK_ADDRSIG_SYM,
  DK_END
};

/// Maps directive name --> DirectiveKind enum, for
/// directives parsed by this class.
StringMap<DirectiveKind> DirectiveKindMap;

// ".ascii", ".asciz", ".string"
bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated);
bool parseDirectiveReloc(SMLoc DirectiveLoc); // ".reloc"
bool parseDirectiveValue(StringRef IDVal,
                         unsigned Size);       // ".byte", ".long", ...
bool parseDirectiveOctaValue(StringRef IDVal); // ".octa", ...
bool parseDirectiveRealValue(StringRef IDVal,
                             const fltSemantics &); // ".single", ...
bool parseDirectiveFill(); // ".fill"
bool parseDirectiveZero(); // ".zero"
// ".set", ".equ", ".equiv"
bool parseDirectiveSet(StringRef IDVal, bool allow_redef);
bool parseDirectiveOrg(); // ".org"
// ".align{,32}", ".p2align{,w,l}"
bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize);

// ".file", ".line", ".loc", ".stabs"
bool parseDirectiveFile(SMLoc DirectiveLoc);
bool parseDirectiveLine();
bool parseDirectiveLoc();
bool parseDirectiveStabs();

// ".cv_file", ".cv_func_id", ".cv_inline_site_id", ".cv_loc", ".cv_linetable",
// ".cv_inline_linetable", ".cv_def_range"
bool parseDirectiveCVFile();
bool parseDirectiveCVFuncId();
bool parseDirectiveCVInlineSiteId();
bool parseDirectiveCVLoc();
bool parseDirectiveCVLinetable();
bool parseDirectiveCVInlineLinetable();
bool parseDirectiveCVDefRange();
bool parseDirectiveCVStringTable();
bool parseDirectiveCVFileChecksums();
bool parseDirectiveCVFileChecksumOffset();
bool parseDirectiveCVFPOData();

// .cfi directives
bool parseDirectiveCFIRegister(SMLoc DirectiveLoc);
bool parseDirectiveCFIWindowSave();
bool parseDirectiveCFISections();
bool parseDirectiveCFIStartProc();
bool parseDirectiveCFIEndProc();
bool parseDirectiveCFIDefCfaOffset();
bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc);
bool parseDirectiveCFIAdjustCfaOffset();
bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc);
bool parseDirectiveCFIOffset(SMLoc DirectiveLoc);
bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc);
bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality);
bool parseDirectiveCFIRememberState();
bool parseDirectiveCFIRestoreState();
bool parseDirectiveCFISameValue(SMLoc DirectiveLoc);
bool parseDirectiveCFIRestore(SMLoc DirectiveLoc);
bool parseDirectiveCFIEscape();
bool parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc);
bool parseDirectiveCFISignalFrame();
bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc);

// macro directives
bool parseDirectivePurgeMacro(SMLoc DirectiveLoc);
bool parseDirectiveExitMacro(StringRef Directive);
bool parseDirectiveEndMacro(StringRef Directive);
bool parseDirectiveMacro(SMLoc DirectiveLoc);
bool parseDirectiveMacrosOnOff(StringRef Directive);
// alternate macro mode directives
bool parseDirectiveAltmacro(StringRef Directive);
// ".bundle_align_mode"
bool parseDirectiveBundleAlignMode();
// ".bundle_lock"
bool parseDirectiveBundleLock();
// ".bundle_unlock"
bool parseDirectiveBundleUnlock();

// ".space", ".skip"
bool parseDirectiveSpace(StringRef IDVal);

// ".dcb"
bool parseDirectiveDCB(StringRef IDVal, unsigned Size);
bool parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &);
// ".ds"
bool parseDirectiveDS(StringRef IDVal, unsigned Size);

// .sleb128 (Signed=true) and .uleb128 (Signed=false)
bool parseDirectiveLEB128(bool Signed);

/// Parse a directive like ".globl" which
/// accepts a single symbol (which should be a label or an external).
bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr);

bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"

bool parseDirectiveAbort(); // ".abort"
bool parseDirectiveInclude(); // ".include"
bool parseDirectiveIncbin(); // ".incbin"

// ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne"
bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind);
// ".ifb" or ".ifnb", depending on ExpectBlank.
bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
// ".ifc" or ".ifnc", depending on ExpectEqual.
bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
// ".ifeqs" or ".ifnes", depending on ExpectEqual.
bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual);
// ".ifdef" or ".ifndef", depending on expect_defined
bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else"
bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
bool parseEscapedString(std::string &Data) override;

const MCExpr *applyModifierToExpr(const MCExpr *E,
                                  MCSymbolRefExpr::VariantKind Variant);

// Macro-like directives
MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc);
void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
                              raw_svector_ostream &OS);
bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive);
bool parseDirectiveIrp(SMLoc DirectiveLoc);  // ".irp"
bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc"
bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr"

// "_emit" or "__emit"
bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info,
                          size_t Len);

// "align"
bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info);

// "end"
bool parseDirectiveEnd(SMLoc DirectiveLoc);

// ".err" or ".error"
bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage);

// ".warning"
bool parseDirectiveWarning(SMLoc DirectiveLoc);

// .print <double-quotes-string>
bool parseDirectivePrint(SMLoc DirectiveLoc);

// Directives to support address-significance tables.
bool parseDirectiveAddrsig();
bool parseDirectiveAddrsigSym();

void initializeDirectiveKindMap();
664};

666} // end anonymous namespace

668namespace llvm {

670extern MCAsmParserExtension *createDarwinAsmParser();
671extern MCAsmParserExtension *createELFAsmParser();
672extern MCAsmParserExtension *createCOFFAsmParser();

674} // end namespace llvm

676enum { DEFAULT_ADDRSPACE = 0 };

678AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
                   const MCAsmInfo &MAI, unsigned CB = 0)
  : Lexer(MAI), Ctx(Ctx), Out(Out), MAI(MAI), SrcMgr(SM),
    CurBuffer(CB ? CB : SM.getMainFileID()), MacrosEnabledFlag(true) {
HadError = false;
// Save the old handler.
SavedDiagHandler = SrcMgr.getDiagHandler();
SavedDiagContext = SrcMgr.getDiagContext();
// Set our own handler which calls the saved handler.
SrcMgr.setDiagHandler(DiagHandler, this);
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());

// Initialize the platform / file format parser.
switch (Ctx.getObjectFileInfo()->getObjectFileType()) {
case MCObjectFileInfo::IsCOFF:
  PlatformParser.reset(createCOFFAsmParser());
  break;
case MCObjectFileInfo::IsMachO:
  PlatformParser.reset(createDarwinAsmParser());
  IsDarwin = true;
  break;
case MCObjectFileInfo::IsELF:
  PlatformParser.reset(createELFAsmParser());
  break;
case MCObjectFileInfo::IsWasm:
  // TODO: WASM will need its own MCAsmParserExtension implementation, but
  // for now we can re-use the ELF one, since the directives can be the
  // same for now.
  PlatformParser.reset(createELFAsmParser());
  break;
}

PlatformParser->Initialize(*this);
initializeDirectiveKindMap();

NumOfMacroInstantiations = 0;
714}

716AsmParser::~AsmParser() {
assert((HadError || ActiveMacros.empty()) &&(static_cast <bool> ((HadError || ActiveMacros.empty())
 && "Unexpected active macro instantiation!") ? void (
0) : __assert_fail ("(HadError || ActiveMacros.empty()) && \"Unexpected active macro instantiation!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 718, __extension__ __PRETTY_FUNCTION__))
       "Unexpected active macro instantiation!")(static_cast <bool> ((HadError || ActiveMacros.empty())
 && "Unexpected active macro instantiation!") ? void (
0) : __assert_fail ("(HadError || ActiveMacros.empty()) && \"Unexpected active macro instantiation!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 718, __extension__ __PRETTY_FUNCTION__));

// Restore the saved diagnostics handler and context for use during
// finalization.
SrcMgr.setDiagHandler(SavedDiagHandler, SavedDiagContext);
723}

725void AsmParser::printMacroInstantiations() {
// Print the active macro instantiation stack.
for (std::vector<MacroInstantiation *>::const_reverse_iterator
         it = ActiveMacros.rbegin(),
         ie = ActiveMacros.rend();
     it != ie; ++it)
  printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note,
               "while in macro instantiation");
733}

735void AsmParser::Note(SMLoc L, const Twine &Msg, SMRange Range) {
printPendingErrors();
printMessage(L, SourceMgr::DK_Note, Msg, Range);
printMacroInstantiations();
739}

741bool AsmParser::Warning(SMLoc L, const Twine &Msg, SMRange Range) {
if(getTargetParser().getTargetOptions().MCNoWarn)
  return false;
if (getTargetParser().getTargetOptions().MCFatalWarnings)
  return Error(L, Msg, Range);
printMessage(L, SourceMgr::DK_Warning, Msg, Range);
printMacroInstantiations();
return false;
749}

751bool AsmParser::printError(SMLoc L, const Twine &Msg, SMRange Range) {
HadError = true;
printMessage(L, SourceMgr::DK_Error, Msg, Range);
printMacroInstantiations();
return true;
756}

758bool AsmParser::enterIncludeFile(const std::string &Filename) {
std::string IncludedFile;
unsigned NewBuf =
    SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
if (!NewBuf)
  return true;

CurBuffer = NewBuf;
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
return false;
768}

770/// Process the specified .incbin file by searching for it in the include paths
771/// then just emitting the byte contents of the file to the streamer. This
772/// returns true on failure.
773bool AsmParser::processIncbinFile(const std::string &Filename, int64_t Skip,
                                const MCExpr *Count, SMLoc Loc) {
std::string IncludedFile;
unsigned NewBuf =
    SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
if (!NewBuf)
  return true;

// Pick up the bytes from the file and emit them.
StringRef Bytes = SrcMgr.getMemoryBuffer(NewBuf)->getBuffer();
Bytes = Bytes.drop_front(Skip);
if (Count) {
  int64_t Res;
  if (!Count->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
    return Error(Loc, "expected absolute expression");
  if (Res < 0)
    return Warning(Loc, "negative count has no effect");
  Bytes = Bytes.take_front(Res);
}
getStreamer().EmitBytes(Bytes);
return false;
794}

796void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) {
CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc);
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer(),
                Loc.getPointer());
800}

802const AsmToken &AsmParser::Lex() {
if (Lexer.getTok().is(AsmToken::Error))
  Error(Lexer.getErrLoc(), Lexer.getErr());

// if it's a end of statement with a comment in it
if (getTok().is(AsmToken::EndOfStatement)) {
  // if this is a line comment output it.
  if (!getTok().getString().empty() && getTok().getString().front() != '\n' &&
      getTok().getString().front() != '\r' && MAI.preserveAsmComments())
    Out.addExplicitComment(Twine(getTok().getString()));
}

const AsmToken *tok = &Lexer.Lex();

// Parse comments here to be deferred until end of next statement.
while (tok->is(AsmToken::Comment)) {
  if (MAI.preserveAsmComments())
    Out.addExplicitComment(Twine(tok->getString()));
  tok = &Lexer.Lex();
}

if (tok->is(AsmToken::Eof)) {
  // If this is the end of an included file, pop the parent file off the
  // include stack.
  SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer);
  if (ParentIncludeLoc != SMLoc()) {
    jumpToLoc(ParentIncludeLoc);
    return Lex();
  }
}

return *tok;
834}

836bool AsmParser::enabledGenDwarfForAssembly() {
// Check whether the user specified -g.
if (!getContext().getGenDwarfForAssembly())
  return false;
// If we haven't encountered any .file directives (which would imply that
// the assembler source was produced with debug info already) then emit one
// describing the assembler source file itself.
if (getContext().getGenDwarfFileNumber() == 0)
  getContext().setGenDwarfFileNumber(getStreamer().EmitDwarfFileDirective(
      0, StringRef(), getContext().getMainFileName()));
return true;
847}

849bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
// Create the initial section, if requested.
if (!NoInitialTextSection)
  Out.InitSections(false);

// Prime the lexer.
Lex();

HadError = false;
AsmCond StartingCondState = TheCondState;
SmallVector<AsmRewrite, 4> AsmStrRewrites;

// If we are generating dwarf for assembly source files save the initial text
// section.  (Don't use enabledGenDwarfForAssembly() here, as we aren't
// emitting any actual debug info yet and haven't had a chance to parse any
// embedded .file directives.)
if (getContext().getGenDwarfForAssembly()) {
  MCSection *Sec = getStreamer().getCurrentSectionOnly();
  if (!Sec->getBeginSymbol()) {
    MCSymbol *SectionStartSym = getContext().createTempSymbol();
    getStreamer().EmitLabel(SectionStartSym);
    Sec->setBeginSymbol(SectionStartSym);
  }
  bool InsertResult = getContext().addGenDwarfSection(Sec);
  assert(InsertResult && ".text section should not have debug info yet")(static_cast <bool> (InsertResult && ".text section should not have debug info yet"
) ? void (0) : __assert_fail ("InsertResult && \".text section should not have debug info yet\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 873, __extension__ __PRETTY_FUNCTION__));
  (void)InsertResult;
}

// While we have input, parse each statement.
while (Lexer.isNot(AsmToken::Eof)) {
  ParseStatementInfo Info(&AsmStrRewrites);
  if (!parseStatement(Info, nullptr))
    continue;

  // If we have a Lexer Error we are on an Error Token. Load in Lexer Error
  // for printing ErrMsg via Lex() only if no (presumably better) parser error
  // exists.
  if (!hasPendingError() && Lexer.getTok().is(AsmToken::Error)) {
    Lex();
  }

  // parseStatement returned true so may need to emit an error.
  printPendingErrors();

  // Skipping to the next line if needed.
  if (!getLexer().isAtStartOfStatement())
    eatToEndOfStatement();
}

// All errors should have been emitted.
assert(!hasPendingError() && "unexpected error from parseStatement")(static_cast <bool> (!hasPendingError() && "unexpected error from parseStatement"
) ? void (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 899, __extension__ __PRETTY_FUNCTION__));

getTargetParser().flushPendingInstructions(getStreamer());

if (TheCondState.TheCond != StartingCondState.TheCond ||
    TheCondState.Ignore != StartingCondState.Ignore)
  printError(getTok().getLoc(), "unmatched .ifs or .elses");
// Check to see there are no empty DwarfFile slots.
const auto &LineTables = getContext().getMCDwarfLineTables();
if (!LineTables.empty()) {
  unsigned Index = 0;
  for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) {
    if (File.Name.empty() && Index != 0)
      printError(getTok().getLoc(), "unassigned file number: " +
                                        Twine(Index) +
                                        " for .file directives");
    ++Index;
  }
}

// Check to see that all assembler local symbols were actually defined.
// Targets that don't do subsections via symbols may not want this, though,
// so conservatively exclude them. Only do this if we're finalizing, though,
// as otherwise we won't necessarilly have seen everything yet.
if (!NoFinalize) {
  if (MAI.hasSubsectionsViaSymbols()) {
    for (const auto &TableEntry : getContext().getSymbols()) {
      MCSymbol *Sym = TableEntry.getValue();
      // Variable symbols may not be marked as defined, so check those
      // explicitly. If we know it's a variable, we have a definition for
      // the purposes of this check.
      if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined())
        // FIXME: We would really like to refer back to where the symbol was
        // first referenced for a source location. We need to add something
        // to track that. Currently, we just point to the end of the file.
        printError(getTok().getLoc(), "assembler local symbol '" +
                                          Sym->getName() + "' not defined");
    }
  }

  // Temporary symbols like the ones for directional jumps don't go in the
  // symbol table. They also need to be diagnosed in all (final) cases.
  for (std::tuple<SMLoc, CppHashInfoTy, MCSymbol *> &LocSym : DirLabels) {
    if (std::get<2>(LocSym)->isUndefined()) {
      // Reset the state of any "# line file" directives we've seen to the
      // context as it was at the diagnostic site.
      CppHashInfo = std::get<1>(LocSym);
      printError(std::get<0>(LocSym), "directional label undefined");
    }
  }
}

// Finalize the output stream if there are no errors and if the client wants
// us to.
if (!HadError && !NoFinalize)
  Out.Finish();

return HadError || getContext().hadError();
957}

959bool AsmParser::checkForValidSection() {
if (!ParsingInlineAsm && !getStreamer().getCurrentSectionOnly()) {
  Out.InitSections(false);
  return Error(getTok().getLoc(),
               "expected section directive before assembly directive");
}
return false;
966}

968/// Throw away the rest of the line for testing purposes.
969void AsmParser::eatToEndOfStatement() {
while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
  Lexer.Lex();

// Eat EOL.
if (Lexer.is(AsmToken::EndOfStatement))
  Lexer.Lex();
976}

978StringRef AsmParser::parseStringToEndOfStatement() {
const char *Start = getTok().getLoc().getPointer();

while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
  Lexer.Lex();

const char *End = getTok().getLoc().getPointer();
return StringRef(Start, End - Start);
986}

988StringRef AsmParser::parseStringToComma() {
const char *Start = getTok().getLoc().getPointer();

while (Lexer.isNot(AsmToken::EndOfStatement) &&
       Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof))
  Lexer.Lex();

const char *End = getTok().getLoc().getPointer();
return StringRef(Start, End - Start);
997}

999/// Parse a paren expression and return it.
1000/// NOTE: This assumes the leading '(' has already been consumed.
1001///
1002/// parenexpr ::= expr)
1003///
1004bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) {
if (parseExpression(Res))
  return true;
if (Lexer.isNot(AsmToken::RParen))
  return TokError("expected ')' in parentheses expression");
EndLoc = Lexer.getTok().getEndLoc();
Lex();
return false;
1012}

1014/// Parse a bracket expression and return it.
1015/// NOTE: This assumes the leading '[' has already been consumed.
1016///
1017/// bracketexpr ::= expr]
1018///
1019bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) {
if (parseExpression(Res))
  return true;
EndLoc = getTok().getEndLoc();
if (parseToken(AsmToken::RBrac, "expected ']' in brackets expression"))
  return true;
return false;
1026}

1028/// Parse a primary expression and return it.
1029///  primaryexpr ::= (parenexpr
1030///  primaryexpr ::= symbol
1031///  primaryexpr ::= number
1032///  primaryexpr ::= '.'
1033///  primaryexpr ::= ~,+,- primaryexpr
1034bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) {
SMLoc FirstTokenLoc = getLexer().getLoc();
AsmToken::TokenKind FirstTokenKind = Lexer.getKind();
switch (FirstTokenKind) {
default:
  return TokError("unknown token in expression");
// If we have an error assume that we've already handled it.
case AsmToken::Error:
  return true;
case AsmToken::Exclaim:
  Lex(); // Eat the operator.
  if (parsePrimaryExpr(Res, EndLoc))
    return true;
  Res = MCUnaryExpr::createLNot(Res, getContext(), FirstTokenLoc);
  return false;
case AsmToken::Dollar:
case AsmToken::At:
case AsmToken::String:
case AsmToken::Identifier: {
  StringRef Identifier;
  if (parseIdentifier(Identifier)) {
    // We may have failed but $ may be a valid token.
    if (getTok().is(AsmToken::Dollar)) {
      if (Lexer.getMAI().getDollarIsPC()) {
        Lex();
        // This is a '$' reference, which references the current PC.  Emit a
        // temporary label to the streamer and refer to it.
        MCSymbol *Sym = Ctx.createTempSymbol();
        Out.EmitLabel(Sym);
        Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None,
                                      getContext());
        EndLoc = FirstTokenLoc;
        return false;
      }
      return Error(FirstTokenLoc, "invalid token in expression");
    }
  }
  // Parse symbol variant
  std::pair<StringRef, StringRef> Split;
  if (!MAI.useParensForSymbolVariant()) {
    if (FirstTokenKind == AsmToken::String) {
      if (Lexer.is(AsmToken::At)) {
        Lex(); // eat @
        SMLoc AtLoc = getLexer().getLoc();
        StringRef VName;
        if (parseIdentifier(VName))
          return Error(AtLoc, "expected symbol variant after '@'");

        Split = std::make_pair(Identifier, VName);
      }
    } else {
      Split = Identifier.split('@');
    }
  } else if (Lexer.is(AsmToken::LParen)) {
    Lex(); // eat '('.
    StringRef VName;
    parseIdentifier(VName);
    // eat ')'.
    if (parseToken(AsmToken::RParen,
                   "unexpected token in variant, expected ')'"))
      return true;
    Split = std::make_pair(Identifier, VName);
  }

  EndLoc = SMLoc::getFromPointer(Identifier.end());

  // This is a symbol reference.
  StringRef SymbolName = Identifier;
  if (SymbolName.empty())
    return true;

  MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;

  // Lookup the symbol variant if used.
  if (!Split.second.empty()) {
    Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
    if (Variant != MCSymbolRefExpr::VK_Invalid) {
      SymbolName = Split.first;
    } else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) {
      Variant = MCSymbolRefExpr::VK_None;
    } else {
      return Error(SMLoc::getFromPointer(Split.second.begin()),
                   "invalid variant '" + Split.second + "'");
    }
  }

  MCSymbol *Sym = getContext().getOrCreateSymbol(SymbolName);

  // If this is an absolute variable reference, substitute it now to preserve
  // semantics in the face of reassignment.
  if (Sym->isVariable()) {
    auto V = Sym->getVariableValue(/*SetUsed*/ false);
    bool DoInline = isa<MCConstantExpr>(V);
    if (auto TV = dyn_cast<MCTargetExpr>(V))
      DoInline = TV->inlineAssignedExpr();
    if (DoInline) {
      if (Variant)
        return Error(EndLoc, "unexpected modifier on variable reference");
      Res = Sym->getVariableValue(/*SetUsed*/ false);
      return false;
    }
  }

  // Otherwise create a symbol ref.
  Res = MCSymbolRefExpr::create(Sym, Variant, getContext(), FirstTokenLoc);
  return false;
}
case AsmToken::BigNum:
  return TokError("literal value out of range for directive");
case AsmToken::Integer: {
  SMLoc Loc = getTok().getLoc();
  int64_t IntVal = getTok().getIntVal();
  Res = MCConstantExpr::create(IntVal, getContext());
  EndLoc = Lexer.getTok().getEndLoc();
  Lex(); // Eat token.
  // Look for 'b' or 'f' following an Integer as a directional label
  if (Lexer.getKind() == AsmToken::Identifier) {
    StringRef IDVal = getTok().getString();
    // Lookup the symbol variant if used.
    std::pair<StringRef, StringRef> Split = IDVal.split('@');
    MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
    if (Split.first.size() != IDVal.size()) {
      Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
      if (Variant == MCSymbolRefExpr::VK_Invalid)
        return TokError("invalid variant '" + Split.second + "'");
      IDVal = Split.first;
    }
    if (IDVal == "f" || IDVal == "b") {
      MCSymbol *Sym =
          Ctx.getDirectionalLocalSymbol(IntVal, IDVal == "b");
      Res = MCSymbolRefExpr::create(Sym, Variant, getContext());
      if (IDVal == "b" && Sym->isUndefined())
        return Error(Loc, "directional label undefined");
      DirLabels.push_back(std::make_tuple(Loc, CppHashInfo, Sym));
      EndLoc = Lexer.getTok().getEndLoc();
      Lex(); // Eat identifier.
    }
  }
  return false;
}
case AsmToken::Real: {
  APFloat RealVal(APFloat::IEEEdouble(), getTok().getString());
  uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
  Res = MCConstantExpr::create(IntVal, getContext());
  EndLoc = Lexer.getTok().getEndLoc();
  Lex(); // Eat token.
  return false;
}
case AsmToken::Dot: {
  // This is a '.' reference, which references the current PC.  Emit a
  // temporary label to the streamer and refer to it.
  MCSymbol *Sym = Ctx.createTempSymbol();
  Out.EmitLabel(Sym);
  Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, getContext());
  EndLoc = Lexer.getTok().getEndLoc();
  Lex(); // Eat identifier.
  return false;
}
case AsmToken::LParen:
  Lex(); // Eat the '('.
  return parseParenExpr(Res, EndLoc);
case AsmToken::LBrac:
  if (!PlatformParser->HasBracketExpressions())
    return TokError("brackets expression not supported on this target");
  Lex(); // Eat the '['.
  return parseBracketExpr(Res, EndLoc);
case AsmToken::Minus:
  Lex(); // Eat the operator.
  if (parsePrimaryExpr(Res, EndLoc))
    return true;
  Res = MCUnaryExpr::createMinus(Res, getContext(), FirstTokenLoc);
  return false;
case AsmToken::Plus:
  Lex(); // Eat the operator.
  if (parsePrimaryExpr(Res, EndLoc))
    return true;
  Res = MCUnaryExpr::createPlus(Res, getContext(), FirstTokenLoc);
  return false;
case AsmToken::Tilde:
  Lex(); // Eat the operator.
  if (parsePrimaryExpr(Res, EndLoc))
    return true;
  Res = MCUnaryExpr::createNot(Res, getContext(), FirstTokenLoc);
  return false;
// MIPS unary expression operators. The lexer won't generate these tokens if
// MCAsmInfo::HasMipsExpressions is false for the target.
case AsmToken::PercentCall16:
case AsmToken::PercentCall_Hi:
case AsmToken::PercentCall_Lo:
case AsmToken::PercentDtprel_Hi:
case AsmToken::PercentDtprel_Lo:
case AsmToken::PercentGot:
case AsmToken::PercentGot_Disp:
case AsmToken::PercentGot_Hi:
case AsmToken::PercentGot_Lo:
case AsmToken::PercentGot_Ofst:
case AsmToken::PercentGot_Page:
case AsmToken::PercentGottprel:
case AsmToken::PercentGp_Rel:
case AsmToken::PercentHi:
case AsmToken::PercentHigher:
case AsmToken::PercentHighest:
case AsmToken::PercentLo:
case AsmToken::PercentNeg:
case AsmToken::PercentPcrel_Hi:
case AsmToken::PercentPcrel_Lo:
case AsmToken::PercentTlsgd:
case AsmToken::PercentTlsldm:
case AsmToken::PercentTprel_Hi:
case AsmToken::PercentTprel_Lo:
  Lex(); // Eat the operator.
  if (Lexer.isNot(AsmToken::LParen))
    return TokError("expected '(' after operator");
  Lex(); // Eat the operator.
  if (parseExpression(Res, EndLoc))
    return true;
  if (Lexer.isNot(AsmToken::RParen))
    return TokError("expected ')'");
  Lex(); // Eat the operator.
  Res = getTargetParser().createTargetUnaryExpr(Res, FirstTokenKind, Ctx);
  return !Res;
}
1256}

1258bool AsmParser::parseExpression(const MCExpr *&Res) {
SMLoc EndLoc;
return parseExpression(Res, EndLoc);
1261}

1263const MCExpr *
1264AsmParser::applyModifierToExpr(const MCExpr *E,
                             MCSymbolRefExpr::VariantKind Variant) {
// Ask the target implementation about this expression first.
const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx);
if (NewE)
  return NewE;
// Recurse over the given expression, rebuilding it to apply the given variant
// if there is exactly one symbol.
switch (E->getKind()) {
case MCExpr::Target:
case MCExpr::Constant:
  return nullptr;

case MCExpr::SymbolRef: {
  const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);

  if (SRE->getKind() != MCSymbolRefExpr::VK_None) {
    TokError("invalid variant on expression '" + getTok().getIdentifier() +
             "' (already modified)");
    return E;
  }

  return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, getContext());
}

case MCExpr::Unary: {
  const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
  const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant);
  if (!Sub)
    return nullptr;
  return MCUnaryExpr::create(UE->getOpcode(), Sub, getContext());
}

case MCExpr::Binary: {
  const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
  const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant);
  const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant);

  if (!LHS && !RHS)
    return nullptr;

  if (!LHS)
    LHS = BE->getLHS();
  if (!RHS)
    RHS = BE->getRHS();

  return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, getContext());
}
}

llvm_unreachable("Invalid expression kind!")::llvm::llvm_unreachable_internal("Invalid expression kind!",
 "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 1314);
1315}

1317/// This function checks if the next token is <string> type or arithmetic.
1318/// string that begin with character '<' must end with character '>'.
1319/// otherwise it is arithmetics.
1320/// If the function returns a 'true' value,
1321/// the End argument will be filled with the last location pointed to the '>'
1322/// character.

1324/// There is a gap between the AltMacro's documentation and the single quote implementation.
1325/// GCC does not fully support this feature and so we will not support it.
1326/// TODO: Adding single quote as a string.
1327bool AsmParser::isAltmacroString(SMLoc &StrLoc, SMLoc &EndLoc) {
assert((StrLoc.getPointer() != NULL) &&(static_cast <bool> ((StrLoc.getPointer() != __null) &&
 "Argument to the function cannot be a NULL value") ? void (0
) : __assert_fail ("(StrLoc.getPointer() != NULL) && \"Argument to the function cannot be a NULL value\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 1329, __extension__ __PRETTY_FUNCTION__))
       "Argument to the function cannot be a NULL value")(static_cast <bool> ((StrLoc.getPointer() != __null) &&
 "Argument to the function cannot be a NULL value") ? void (0
) : __assert_fail ("(StrLoc.getPointer() != NULL) && \"Argument to the function cannot be a NULL value\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 1329, __extension__ __PRETTY_FUNCTION__));
const char *CharPtr = StrLoc.getPointer();
while ((*CharPtr != '>') && (*CharPtr != '\n') && (*CharPtr != '\r') &&
       (*CharPtr != '\0')) {
  if (*CharPtr == '!')
    CharPtr++;
  CharPtr++;
}
if (*CharPtr == '>') {
  EndLoc = StrLoc.getFromPointer(CharPtr + 1);
  return true;
}
return false;
1342}

1344/// creating a string without the escape characters '!'.
1345void AsmParser::altMacroString(StringRef AltMacroStr,std::string &Res) {
for (size_t Pos = 0; Pos < AltMacroStr.size(); Pos++) {
  if (AltMacroStr[Pos] == '!')
    Pos++;
  Res += AltMacroStr[Pos];
}
1351}

1353/// Parse an expression and return it.
1354///
1355///  expr ::= expr &&,|| expr               -> lowest.
1356///  expr ::= expr |,^,&,! expr
1357///  expr ::= expr ==,!=,<>,<,<=,>,>= expr
1358///  expr ::= expr <<,>> expr
1359///  expr ::= expr +,- expr
1360///  expr ::= expr *,/,% expr               -> highest.
1361///  expr ::= primaryexpr
1362///
1363bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
// Parse the expression.
Res = nullptr;
if (parsePrimaryExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc))
  return true;

// As a special case, we support 'a op b @ modifier' by rewriting the
// expression to include the modifier. This is inefficient, but in general we
// expect users to use 'a@modifier op b'.
if (Lexer.getKind() == AsmToken::At) {
  Lex();

  if (Lexer.isNot(AsmToken::Identifier))
    return TokError("unexpected symbol modifier following '@'");

  MCSymbolRefExpr::VariantKind Variant =
      MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier());
  if (Variant == MCSymbolRefExpr::VK_Invalid)
    return TokError("invalid variant '" + getTok().getIdentifier() + "'");

  const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant);
  if (!ModifiedRes) {
    return TokError("invalid modifier '" + getTok().getIdentifier() +
                    "' (no symbols present)");
  }

  Res = ModifiedRes;
  Lex();
}

// Try to constant fold it up front, if possible. Do not exploit
// assembler here.
int64_t Value;
if (Res->evaluateAsAbsolute(Value))
  Res = MCConstantExpr::create(Value, getContext());

return false;
1400}

1402bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) {
Res = nullptr;
return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc);
1405}

1407bool AsmParser::parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
                                    SMLoc &EndLoc) {
if (parseParenExpr(Res, EndLoc))
  return true;

for (; ParenDepth > 0; --ParenDepth) {
  if (parseBinOpRHS(1, Res, EndLoc))
    return true;

  // We don't Lex() the last RParen.
  // This is the same behavior as parseParenExpression().
  if (ParenDepth - 1 > 0) {
    EndLoc = getTok().getEndLoc();
    if (parseToken(AsmToken::RParen,
                   "expected ')' in parentheses expression"))
      return true;
  }
}
return false;
1426}

1428bool AsmParser::parseAbsoluteExpression(int64_t &Res) {
const MCExpr *Expr;

SMLoc StartLoc = Lexer.getLoc();
if (parseExpression(Expr))
  return true;

if (!Expr->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
  return Error(StartLoc, "expected absolute expression");

return false;
1439}

1441static unsigned getDarwinBinOpPrecedence(AsmToken::TokenKind K,
                                       MCBinaryExpr::Opcode &Kind,
                                       bool ShouldUseLogicalShr) {
switch (K) {
default:
  return 0; // not a binop.

// Lowest Precedence: &&, ||
case AsmToken::AmpAmp:
  Kind = MCBinaryExpr::LAnd;
  return 1;
case AsmToken::PipePipe:
  Kind = MCBinaryExpr::LOr;
  return 1;

// Low Precedence: |, &, ^
//
// FIXME: gas seems to support '!' as an infix operator?
case AsmToken::Pipe:
  Kind = MCBinaryExpr::Or;
  return 2;
case AsmToken::Caret:
  Kind = MCBinaryExpr::Xor;
  return 2;
case AsmToken::Amp:
  Kind = MCBinaryExpr::And;
  return 2;

// Low Intermediate Precedence: ==, !=, <>, <, <=, >, >=
case AsmToken::EqualEqual:
  Kind = MCBinaryExpr::EQ;
  return 3;
case AsmToken::ExclaimEqual:
case AsmToken::LessGreater:
  Kind = MCBinaryExpr::NE;
  return 3;
case AsmToken::Less:
  Kind = MCBinaryExpr::LT;
  return 3;
case AsmToken::LessEqual:
  Kind = MCBinaryExpr::LTE;
  return 3;
case AsmToken::Greater:
  Kind = MCBinaryExpr::GT;
  return 3;
case AsmToken::GreaterEqual:
  Kind = MCBinaryExpr::GTE;
  return 3;

// Intermediate Precedence: <<, >>
case AsmToken::LessLess:
  Kind = MCBinaryExpr::Shl;
  return 4;
case AsmToken::GreaterGreater:
  Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
  return 4;

// High Intermediate Precedence: +, -
case AsmToken::Plus:
  Kind = MCBinaryExpr::Add;
  return 5;
case AsmToken::Minus:
  Kind = MCBinaryExpr::Sub;
  return 5;

// Highest Precedence: *, /, %
case AsmToken::Star:
  Kind = MCBinaryExpr::Mul;
  return 6;
case AsmToken::Slash:
  Kind = MCBinaryExpr::Div;
  return 6;
case AsmToken::Percent:
  Kind = MCBinaryExpr::Mod;
  return 6;
}
1517}

1519static unsigned getGNUBinOpPrecedence(AsmToken::TokenKind K,
                                    MCBinaryExpr::Opcode &Kind,
                                    bool ShouldUseLogicalShr) {
switch (K) {
default:
  return 0; // not a binop.

// Lowest Precedence: &&, ||
case AsmToken::AmpAmp:
  Kind = MCBinaryExpr::LAnd;
  return 2;
case AsmToken::PipePipe:
  Kind = MCBinaryExpr::LOr;
  return 1;

// Low Precedence: ==, !=, <>, <, <=, >, >=
case AsmToken::EqualEqual:
  Kind = MCBinaryExpr::EQ;
  return 3;
case AsmToken::ExclaimEqual:
case AsmToken::LessGreater:
  Kind = MCBinaryExpr::NE;
  return 3;
case AsmToken::Less:
  Kind = MCBinaryExpr::LT;
  return 3;
case AsmToken::LessEqual:
  Kind = MCBinaryExpr::LTE;
  return 3;
case AsmToken::Greater:
  Kind = MCBinaryExpr::GT;
  return 3;
case AsmToken::GreaterEqual:
  Kind = MCBinaryExpr::GTE;
  return 3;

// Low Intermediate Precedence: +, -
case AsmToken::Plus:
  Kind = MCBinaryExpr::Add;
  return 4;
case AsmToken::Minus:
  Kind = MCBinaryExpr::Sub;
  return 4;

// High Intermediate Precedence: |, &, ^
//
// FIXME: gas seems to support '!' as an infix operator?
case AsmToken::Pipe:
  Kind = MCBinaryExpr::Or;
  return 5;
case AsmToken::Caret:
  Kind = MCBinaryExpr::Xor;
  return 5;
case AsmToken::Amp:
  Kind = MCBinaryExpr::And;
  return 5;

// Highest Precedence: *, /, %, <<, >>
case AsmToken::Star:
  Kind = MCBinaryExpr::Mul;
  return 6;
case AsmToken::Slash:
  Kind = MCBinaryExpr::Div;
  return 6;
case AsmToken::Percent:
  Kind = MCBinaryExpr::Mod;
  return 6;
case AsmToken::LessLess:
  Kind = MCBinaryExpr::Shl;
  return 6;
case AsmToken::GreaterGreater:
  Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
  return 6;
}
1593}

1595unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K,
                                     MCBinaryExpr::Opcode &Kind) {
bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr();
return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr)
                : getGNUBinOpPrecedence(K, Kind, ShouldUseLogicalShr);
1600}

1602/// Parse all binary operators with precedence >= 'Precedence'.
1603/// Res contains the LHS of the expression on input.
1604bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res,
                            SMLoc &EndLoc) {
SMLoc StartLoc = Lexer.getLoc();
while (true) {
  MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add;
  unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind);

  // If the next token is lower precedence than we are allowed to eat, return
  // successfully with what we ate already.
  if (TokPrec < Precedence)
    return false;

  Lex();

  // Eat the next primary expression.
  const MCExpr *RHS;
  if (parsePrimaryExpr(RHS, EndLoc))
    return true;

  // If BinOp binds less tightly with RHS than the operator after RHS, let
  // the pending operator take RHS as its LHS.
  MCBinaryExpr::Opcode Dummy;
  unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy);
  if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc))
    return true;

  // Merge LHS and RHS according to operator.
  Res = MCBinaryExpr::create(Kind, Res, RHS, getContext(), StartLoc);
}
1633}

1635/// ParseStatement:
1636///   ::= EndOfStatement
1637///   ::= Label* Directive ...Operands... EndOfStatement
1638///   ::= Label* Identifier OperandList* EndOfStatement
1639bool AsmParser::parseStatement(ParseStatementInfo &Info,
                             MCAsmParserSemaCallback *SI) {
assert(!hasPendingError() && "parseStatement started with pending error")(static_cast <bool> (!hasPendingError() && "parseStatement started with pending error"
) ? void (0) : __assert_fail ("!hasPendingError() && \"parseStatement started with pending error\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 1641, __extension__ __PRETTY_FUNCTION__));
// Eat initial spaces and comments
while (Lexer.is(AsmToken::Space))
1
Loop condition is false. Execution continues on line 1645→
  Lex();
if (Lexer.is(AsmToken::EndOfStatement)) {
2
←
Taking false branch→
  // if this is a line comment we can drop it safely
  if (getTok().getString().empty() || getTok().getString().front() == '\r' ||
      getTok().getString().front() == '\n')
    Out.AddBlankLine();
  Lex();
  return false;
}
// Statements always start with an identifier.
AsmToken ID = getTok();
SMLoc IDLoc = ID.getLoc();
StringRef IDVal;
int64_t LocalLabelVal = -1;
if (Lexer.is(AsmToken::HashDirective))
3
←
Taking false branch→
  return parseCppHashLineFilenameComment(IDLoc);
// Allow an integer followed by a ':' as a directional local label.
if (Lexer.is(AsmToken::Integer)) {
4
←
Taking false branch→
  LocalLabelVal = getTok().getIntVal();
  if (LocalLabelVal < 0) {
    if (!TheCondState.Ignore) {
      Lex(); // always eat a token
      return Error(IDLoc, "unexpected token at start of statement");
    }
    IDVal = "";
  } else {
    IDVal = getTok().getString();
    Lex(); // Consume the integer token to be used as an identifier token.
    if (Lexer.getKind() != AsmToken::Colon) {
      if (!TheCondState.Ignore) {
        Lex(); // always eat a token
        return Error(IDLoc, "unexpected token at start of statement");
      }
    }
  }
} else if (Lexer.is(AsmToken::Dot)) {
5
←
Taking false branch→
  // Treat '.' as a valid identifier in this context.
  Lex();
  IDVal = ".";
} else if (Lexer.is(AsmToken::LCurly)) {
6
←
Taking false branch→
  // Treat '{' as a valid identifier in this context.
  Lex();
  IDVal = "{";

} else if (Lexer.is(AsmToken::RCurly)) {
7
←
Taking false branch→
  // Treat '}' as a valid identifier in this context.
  Lex();
  IDVal = "}";
} else if (Lexer.is(AsmToken::Star) &&
           getTargetParser().starIsStartOfStatement()) {
  // Accept '*' as a valid start of statement.
  Lex();
  IDVal = "*";
} else if (parseIdentifier(IDVal)) {
8
←
Assuming the condition is false→
9
←
Taking false branch→
  if (!TheCondState.Ignore) {
    Lex(); // always eat a token
    return Error(IDLoc, "unexpected token at start of statement");
  }
  IDVal = "";
}

// Handle conditional assembly here before checking for skipping.  We
// have to do this so that .endif isn't skipped in a ".if 0" block for
// example.
StringMap<DirectiveKind>::const_iterator DirKindIt =
    DirectiveKindMap.find(IDVal);
DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end())
10
←
Assuming the condition is true→
11
←
'?' condition is true→
                            ? DK_NO_DIRECTIVE
                            : DirKindIt->getValue();
switch (DirKind) {
12
←
Control jumps to the 'default' case at line 1714→
default:
  break;
13
←
 Execution continues on line 1751→
case DK_IF:
case DK_IFEQ:
case DK_IFGE:
case DK_IFGT:
case DK_IFLE:
case DK_IFLT:
case DK_IFNE:
  return parseDirectiveIf(IDLoc, DirKind);
case DK_IFB:
  return parseDirectiveIfb(IDLoc, true);
case DK_IFNB:
  return parseDirectiveIfb(IDLoc, false);
case DK_IFC:
  return parseDirectiveIfc(IDLoc, true);
case DK_IFEQS:
  return parseDirectiveIfeqs(IDLoc, true);
case DK_IFNC:
  return parseDirectiveIfc(IDLoc, false);
case DK_IFNES:
  return parseDirectiveIfeqs(IDLoc, false);
case DK_IFDEF:
  return parseDirectiveIfdef(IDLoc, true);
case DK_IFNDEF:
case DK_IFNOTDEF:
  return parseDirectiveIfdef(IDLoc, false);
case DK_ELSEIF:
  return parseDirectiveElseIf(IDLoc);
case DK_ELSE:
  return parseDirectiveElse(IDLoc);
case DK_ENDIF:
  return parseDirectiveEndIf(IDLoc);
}

// Ignore the statement if in the middle of inactive conditional
// (e.g. ".if 0").
if (TheCondState.Ignore) {
14
←
Assuming the condition is false→
15
←
Taking false branch→
  eatToEndOfStatement();
  return false;
}

// FIXME: Recurse on local labels?

// See what kind of statement we have.
switch (Lexer.getKind()) {
16
←
Control jumps to 'case Equal:'  at line 1823→
case AsmToken::Colon: {
  if (!getTargetParser().isLabel(ID))
    break;
  if (checkForValidSection())
    return true;

  // identifier ':'   -> Label.
  Lex();

  // Diagnose attempt to use '.' as a label.
  if (IDVal == ".")
    return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label");

  // Diagnose attempt to use a variable as a label.
  //
  // FIXME: Diagnostics. Note the location of the definition as a label.
  // FIXME: This doesn't diagnose assignment to a symbol which has been
  // implicitly marked as external.
  MCSymbol *Sym;
  if (LocalLabelVal == -1) {
    if (ParsingInlineAsm && SI) {
      StringRef RewrittenLabel =
          SI->LookupInlineAsmLabel(IDVal, getSourceManager(), IDLoc, true);
      assert(!RewrittenLabel.empty() &&(static_cast <bool> (!RewrittenLabel.empty() &&
 "We should have an internal name here.") ? void (0) : __assert_fail
 ("!RewrittenLabel.empty() && \"We should have an internal name here.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 1784, __extension__ __PRETTY_FUNCTION__))
             "We should have an internal name here.")(static_cast <bool> (!RewrittenLabel.empty() &&
 "We should have an internal name here.") ? void (0) : __assert_fail
 ("!RewrittenLabel.empty() && \"We should have an internal name here.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 1784, __extension__ __PRETTY_FUNCTION__));
      Info.AsmRewrites->emplace_back(AOK_Label, IDLoc, IDVal.size(),
                                     RewrittenLabel);
      IDVal = RewrittenLabel;
    }
    Sym = getContext().getOrCreateSymbol(IDVal);
  } else
    Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal);
  // End of Labels should be treated as end of line for lexing
  // purposes but that information is not available to the Lexer who
  // does not understand Labels. This may cause us to see a Hash
  // here instead of a preprocessor line comment.
  if (getTok().is(AsmToken::Hash)) {
    StringRef CommentStr = parseStringToEndOfStatement();
    Lexer.Lex();
    Lexer.UnLex(AsmToken(AsmToken::EndOfStatement, CommentStr));
  }

  // Consume any end of statement token, if present, to avoid spurious
  // AddBlankLine calls().
  if (getTok().is(AsmToken::EndOfStatement)) {
    Lex();
  }

  // Emit the label.
  if (!getTargetParser().isParsingInlineAsm())
    Out.EmitLabel(Sym, IDLoc);

  // If we are generating dwarf for assembly source files then gather the
  // info to make a dwarf label entry for this label if needed.
  if (enabledGenDwarfForAssembly())
    MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(),
                               IDLoc);

  getTargetParser().onLabelParsed(Sym);

  return false;
}

case AsmToken::Equal:
  if (!getTargetParser().equalIsAsmAssignment())
17
←
Assuming the condition is false→
18
←
Taking false branch→
    break;
  // identifier '=' ... -> assignment statement
  Lex();

  return parseAssignment(IDVal, true, /*NoDeadStrip*/ false, /*AllowExtendedExpr*/true);
19
←
Calling 'AsmParser::parseAssignment'→

default: // Normal instruction or directive.
  break;
}

// If macros are enabled, check to see if this is a macro instantiation.
if (areMacrosEnabled())
  if (const MCAsmMacro *M = getContext().lookupMacro(IDVal)) {
    return handleMacroEntry(M, IDLoc);
  }

// Otherwise, we have a normal instruction or directive.

// Directives start with "."
if (IDVal[0] == '.' && IDVal != ".") {
  // There are several entities interested in parsing directives:
  //
  // 1. The target-specific assembly parser. Some directives are target
  //    specific or may potentially behave differently on certain targets.
  // 2. Asm parser extensions. For example, platform-specific parsers
  //    (like the ELF parser) register themselves as extensions.
  // 3. The generic directive parser implemented by this class. These are
  //    all the directives that behave in a target and platform independent
  //    manner, or at least have a default behavior that's shared between
  //    all targets and platforms.

  getTargetParser().flushPendingInstructions(getStreamer());

  SMLoc StartTokLoc = getTok().getLoc();
  bool TPDirectiveReturn = getTargetParser().ParseDirective(ID);

  if (hasPendingError())
    return true;
  // Currently the return value should be true if we are
  // uninterested but as this is at odds with the standard parsing
  // convention (return true = error) we have instances of a parsed
  // directive that fails returning true as an error. Catch these
  // cases as best as possible errors here.
  if (TPDirectiveReturn && StartTokLoc != getTok().getLoc())
    return true;
  // Return if we did some parsing or believe we succeeded.
  if (!TPDirectiveReturn || StartTokLoc != getTok().getLoc())
    return false;

  // Next, check the extension directive map to see if any extension has
  // registered itself to parse this directive.
  std::pair<MCAsmParserExtension *, DirectiveHandler> Handler =
      ExtensionDirectiveMap.lookup(IDVal);
  if (Handler.first)
    return (*Handler.second)(Handler.first, IDVal, IDLoc);

  // Finally, if no one else is interested in this directive, it must be
  // generic and familiar to this class.
  switch (DirKind) {
  default:
    break;
  case DK_SET:
  case DK_EQU:
    return parseDirectiveSet(IDVal, true);
  case DK_EQUIV:
    return parseDirectiveSet(IDVal, false);
  case DK_ASCII:
    return parseDirectiveAscii(IDVal, false);
  case DK_ASCIZ:
  case DK_STRING:
    return parseDirectiveAscii(IDVal, true);
  case DK_BYTE:
  case DK_DC_B:
    return parseDirectiveValue(IDVal, 1);
  case DK_DC:
  case DK_DC_W:
  case DK_SHORT:
  case DK_VALUE:
  case DK_2BYTE:
    return parseDirectiveValue(IDVal, 2);
  case DK_LONG:
  case DK_INT:
  case DK_4BYTE:
  case DK_DC_L:
    return parseDirectiveValue(IDVal, 4);
  case DK_QUAD:
  case DK_8BYTE:
    return parseDirectiveValue(IDVal, 8);
  case DK_DC_A:
    return parseDirectiveValue(
        IDVal, getContext().getAsmInfo()->getCodePointerSize());
  case DK_OCTA:
    return parseDirectiveOctaValue(IDVal);
  case DK_SINGLE:
  case DK_FLOAT:
  case DK_DC_S:
    return parseDirectiveRealValue(IDVal, APFloat::IEEEsingle());
  case DK_DOUBLE:
  case DK_DC_D:
    return parseDirectiveRealValue(IDVal, APFloat::IEEEdouble());
  case DK_ALIGN: {
    bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
    return parseDirectiveAlign(IsPow2, /*ExprSize=*/1);
  }
  case DK_ALIGN32: {
    bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
    return parseDirectiveAlign(IsPow2, /*ExprSize=*/4);
  }
  case DK_BALIGN:
    return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
  case DK_BALIGNW:
    return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2);
  case DK_BALIGNL:
    return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4);
  case DK_P2ALIGN:
    return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
  case DK_P2ALIGNW:
    return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2);
  case DK_P2ALIGNL:
    return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
  case DK_ORG:
    return parseDirectiveOrg();
  case DK_FILL:
    return parseDirectiveFill();
  case DK_ZERO:
    return parseDirectiveZero();
  case DK_EXTERN:
    eatToEndOfStatement(); // .extern is the default, ignore it.
    return false;
  case DK_GLOBL:
  case DK_GLOBAL:
    return parseDirectiveSymbolAttribute(MCSA_Global);
  case DK_LAZY_REFERENCE:
    return parseDirectiveSymbolAttribute(MCSA_LazyReference);
  case DK_NO_DEAD_STRIP:
    return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip);
  case DK_SYMBOL_RESOLVER:
    return parseDirectiveSymbolAttribute(MCSA_SymbolResolver);
  case DK_PRIVATE_EXTERN:
    return parseDirectiveSymbolAttribute(MCSA_PrivateExtern);
  case DK_REFERENCE:
    return parseDirectiveSymbolAttribute(MCSA_Reference);
  case DK_WEAK_DEFINITION:
    return parseDirectiveSymbolAttribute(MCSA_WeakDefinition);
  case DK_WEAK_REFERENCE:
    return parseDirectiveSymbolAttribute(MCSA_WeakReference);
  case DK_WEAK_DEF_CAN_BE_HIDDEN:
    return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate);
  case DK_COMM:
  case DK_COMMON:
    return parseDirectiveComm(/*IsLocal=*/false);
  case DK_LCOMM:
    return parseDirectiveComm(/*IsLocal=*/true);
  case DK_ABORT:
    return parseDirectiveAbort();
  case DK_INCLUDE:
    return parseDirectiveInclude();
  case DK_INCBIN:
    return parseDirectiveIncbin();
  case DK_CODE16:
  case DK_CODE16GCC:
    return TokError(Twine(IDVal) +
                    " not currently supported for this target");
  case DK_REPT:
    return parseDirectiveRept(IDLoc, IDVal);
  case DK_IRP:
    return parseDirectiveIrp(IDLoc);
  case DK_IRPC:
    return parseDirectiveIrpc(IDLoc);
  case DK_ENDR:
    return parseDirectiveEndr(IDLoc);
  case DK_BUNDLE_ALIGN_MODE:
    return parseDirectiveBundleAlignMode();
  case DK_BUNDLE_LOCK:
    return parseDirectiveBundleLock();
  case DK_BUNDLE_UNLOCK:
    return parseDirectiveBundleUnlock();
  case DK_SLEB128:
    return parseDirectiveLEB128(true);
  case DK_ULEB128:
    return parseDirectiveLEB128(false);
  case DK_SPACE:
  case DK_SKIP:
    return parseDirectiveSpace(IDVal);
  case DK_FILE:
    return parseDirectiveFile(IDLoc);
  case DK_LINE:
    return parseDirectiveLine();
  case DK_LOC:
    return parseDirectiveLoc();
  case DK_STABS:
    return parseDirectiveStabs();
  case DK_CV_FILE:
    return parseDirectiveCVFile();
  case DK_CV_FUNC_ID:
    return parseDirectiveCVFuncId();
  case DK_CV_INLINE_SITE_ID:
    return parseDirectiveCVInlineSiteId();
  case DK_CV_LOC:
    return parseDirectiveCVLoc();
  case DK_CV_LINETABLE:
    return parseDirectiveCVLinetable();
  case DK_CV_INLINE_LINETABLE:
    return parseDirectiveCVInlineLinetable();
  case DK_CV_DEF_RANGE:
    return parseDirectiveCVDefRange();
  case DK_CV_STRINGTABLE:
    return parseDirectiveCVStringTable();
  case DK_CV_FILECHECKSUMS:
    return parseDirectiveCVFileChecksums();
  case DK_CV_FILECHECKSUM_OFFSET:
    return parseDirectiveCVFileChecksumOffset();
  case DK_CV_FPO_DATA:
    return parseDirectiveCVFPOData();
  case DK_CFI_SECTIONS:
    return parseDirectiveCFISections();
  case DK_CFI_STARTPROC:
    return parseDirectiveCFIStartProc();
  case DK_CFI_ENDPROC:
    return parseDirectiveCFIEndProc();
  case DK_CFI_DEF_CFA:
    return parseDirectiveCFIDefCfa(IDLoc);
  case DK_CFI_DEF_CFA_OFFSET:
    return parseDirectiveCFIDefCfaOffset();
  case DK_CFI_ADJUST_CFA_OFFSET:
    return parseDirectiveCFIAdjustCfaOffset();
  case DK_CFI_DEF_CFA_REGISTER:
    return parseDirectiveCFIDefCfaRegister(IDLoc);
  case DK_CFI_OFFSET:
    return parseDirectiveCFIOffset(IDLoc);
  case DK_CFI_REL_OFFSET:
    return parseDirectiveCFIRelOffset(IDLoc);
  case DK_CFI_PERSONALITY:
    return parseDirectiveCFIPersonalityOrLsda(true);
  case DK_CFI_LSDA:
    return parseDirectiveCFIPersonalityOrLsda(false);
  case DK_CFI_REMEMBER_STATE:
    return parseDirectiveCFIRememberState();
  case DK_CFI_RESTORE_STATE:
    return parseDirectiveCFIRestoreState();
  case DK_CFI_SAME_VALUE:
    return parseDirectiveCFISameValue(IDLoc);
  case DK_CFI_RESTORE:
    return parseDirectiveCFIRestore(IDLoc);
  case DK_CFI_ESCAPE:
    return parseDirectiveCFIEscape();
  case DK_CFI_RETURN_COLUMN:
    return parseDirectiveCFIReturnColumn(IDLoc);
  case DK_CFI_SIGNAL_FRAME:
    return parseDirectiveCFISignalFrame();
  case DK_CFI_UNDEFINED:
    return parseDirectiveCFIUndefined(IDLoc);
  case DK_CFI_REGISTER:
    return parseDirectiveCFIRegister(IDLoc);
  case DK_CFI_WINDOW_SAVE:
    return parseDirectiveCFIWindowSave();
  case DK_MACROS_ON:
  case DK_MACROS_OFF:
    return parseDirectiveMacrosOnOff(IDVal);
  case DK_MACRO:
    return parseDirectiveMacro(IDLoc);
  case DK_ALTMACRO:
  case DK_NOALTMACRO:
    return parseDirectiveAltmacro(IDVal);
  case DK_EXITM:
    return parseDirectiveExitMacro(IDVal);
  case DK_ENDM:
  case DK_ENDMACRO:
    return parseDirectiveEndMacro(IDVal);
  case DK_PURGEM:
    return parseDirectivePurgeMacro(IDLoc);
  case DK_END:
    return parseDirectiveEnd(IDLoc);
  case DK_ERR:
    return parseDirectiveError(IDLoc, false);
  case DK_ERROR:
    return parseDirectiveError(IDLoc, true);
  case DK_WARNING:
    return parseDirectiveWarning(IDLoc);
  case DK_RELOC:
    return parseDirectiveReloc(IDLoc);
  case DK_DCB:
  case DK_DCB_W:
    return parseDirectiveDCB(IDVal, 2);
  case DK_DCB_B:
    return parseDirectiveDCB(IDVal, 1);
  case DK_DCB_D:
    return parseDirectiveRealDCB(IDVal, APFloat::IEEEdouble());
  case DK_DCB_L:
    return parseDirectiveDCB(IDVal, 4);
  case DK_DCB_S:
    return parseDirectiveRealDCB(IDVal, APFloat::IEEEsingle());
  case DK_DC_X:
  case DK_DCB_X:
    return TokError(Twine(IDVal) +
                    " not currently supported for this target");
  case DK_DS:
  case DK_DS_W:
    return parseDirectiveDS(IDVal, 2);
  case DK_DS_B:
    return parseDirectiveDS(IDVal, 1);
  case DK_DS_D:
    return parseDirectiveDS(IDVal, 8);
  case DK_DS_L:
  case DK_DS_S:
    return parseDirectiveDS(IDVal, 4);
  case DK_DS_P:
  case DK_DS_X:
    return parseDirectiveDS(IDVal, 12);
  case DK_PRINT:
    return parseDirectivePrint(IDLoc);
  case DK_ADDRSIG:
    return parseDirectiveAddrsig();
  case DK_ADDRSIG_SYM:
    return parseDirectiveAddrsigSym();
  }

  return Error(IDLoc, "unknown directive");
}

// __asm _emit or __asm __emit
if (ParsingInlineAsm && (IDVal == "_emit" || IDVal == "__emit" ||
                         IDVal == "_EMIT" || IDVal == "__EMIT"))
  return parseDirectiveMSEmit(IDLoc, Info, IDVal.size());

// __asm align
if (ParsingInlineAsm && (IDVal == "align" || IDVal == "ALIGN"))
  return parseDirectiveMSAlign(IDLoc, Info);

if (ParsingInlineAsm && (IDVal == "even" || IDVal == "EVEN"))
  Info.AsmRewrites->emplace_back(AOK_EVEN, IDLoc, 4);
if (checkForValidSection())
  return true;

// Canonicalize the opcode to lower case.
std::string OpcodeStr = IDVal.lower();
ParseInstructionInfo IInfo(Info.AsmRewrites);
bool ParseHadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID,
                                                        Info.ParsedOperands);
Info.ParseError = ParseHadError;

// Dump the parsed representation, if requested.
if (getShowParsedOperands()) {
  SmallString<256> Str;
  raw_svector_ostream OS(Str);
  OS << "parsed instruction: [";
  for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) {
    if (i != 0)
      OS << ", ";
    Info.ParsedOperands[i]->print(OS);
  }
  OS << "]";

  printMessage(IDLoc, SourceMgr::DK_Note, OS.str());
}

// Fail even if ParseInstruction erroneously returns false.
if (hasPendingError() || ParseHadError)
  return true;

// If we are generating dwarf for the current section then generate a .loc
// directive for the instruction.
if (!ParseHadError && enabledGenDwarfForAssembly() &&
    getContext().getGenDwarfSectionSyms().count(
        getStreamer().getCurrentSectionOnly())) {
  unsigned Line;
  if (ActiveMacros.empty())
    Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer);
  else
    Line = SrcMgr.FindLineNumber(ActiveMacros.front()->InstantiationLoc,
                                 ActiveMacros.front()->ExitBuffer);

  // If we previously parsed a cpp hash file line comment then make sure the
  // current Dwarf File is for the CppHashFilename if not then emit the
  // Dwarf File table for it and adjust the line number for the .loc.
  if (!CppHashInfo.Filename.empty()) {
    unsigned FileNumber = getStreamer().EmitDwarfFileDirective(
        0, StringRef(), CppHashInfo.Filename);
    getContext().setGenDwarfFileNumber(FileNumber);

    unsigned CppHashLocLineNo =
      SrcMgr.FindLineNumber(CppHashInfo.Loc, CppHashInfo.Buf);
    Line = CppHashInfo.LineNumber - 1 + (Line - CppHashLocLineNo);
  }

  getStreamer().EmitDwarfLocDirective(
      getContext().getGenDwarfFileNumber(), Line, 0,
      DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0, 0, 0,
      StringRef());
}

// If parsing succeeded, match the instruction.
if (!ParseHadError) {
  uint64_t ErrorInfo;
  if (getTargetParser().MatchAndEmitInstruction(
          IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo,
          getTargetParser().isParsingInlineAsm()))
    return true;
}
return false;
2225}

2227// Parse and erase curly braces marking block start/end
2228bool
2229AsmParser::parseCurlyBlockScope(SmallVectorImpl<AsmRewrite> &AsmStrRewrites) {
// Identify curly brace marking block start/end
if (Lexer.isNot(AsmToken::LCurly) && Lexer.isNot(AsmToken::RCurly))
  return false;

SMLoc StartLoc = Lexer.getLoc();
Lex(); // Eat the brace
if (Lexer.is(AsmToken::EndOfStatement))
  Lex(); // Eat EndOfStatement following the brace

// Erase the block start/end brace from the output asm string
AsmStrRewrites.emplace_back(AOK_Skip, StartLoc, Lexer.getLoc().getPointer() -
                                                StartLoc.getPointer());
return true;
2243}

2245/// parseCppHashLineFilenameComment as this:
2246///   ::= # number "filename"
2247bool AsmParser::parseCppHashLineFilenameComment(SMLoc L) {
Lex(); // Eat the hash token.
// Lexer only ever emits HashDirective if it fully formed if it's
// done the checking already so this is an internal error.
assert(getTok().is(AsmToken::Integer) &&(static_cast <bool> (getTok().is(AsmToken::Integer) &&
 "Lexing Cpp line comment: Expected Integer") ? void (0) : __assert_fail
 ("getTok().is(AsmToken::Integer) && \"Lexing Cpp line comment: Expected Integer\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 2252, __extension__ __PRETTY_FUNCTION__))
       "Lexing Cpp line comment: Expected Integer")(static_cast <bool> (getTok().is(AsmToken::Integer) &&
 "Lexing Cpp line comment: Expected Integer") ? void (0) : __assert_fail
 ("getTok().is(AsmToken::Integer) && \"Lexing Cpp line comment: Expected Integer\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 2252, __extension__ __PRETTY_FUNCTION__));
int64_t LineNumber = getTok().getIntVal();
Lex();
assert(getTok().is(AsmToken::String) &&(static_cast <bool> (getTok().is(AsmToken::String) &&
 "Lexing Cpp line comment: Expected String") ? void (0) : __assert_fail
 ("getTok().is(AsmToken::String) && \"Lexing Cpp line comment: Expected String\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 2256, __extension__ __PRETTY_FUNCTION__))
       "Lexing Cpp line comment: Expected String")(static_cast <bool> (getTok().is(AsmToken::String) &&
 "Lexing Cpp line comment: Expected String") ? void (0) : __assert_fail
 ("getTok().is(AsmToken::String) && \"Lexing Cpp line comment: Expected String\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 2256, __extension__ __PRETTY_FUNCTION__));
StringRef Filename = getTok().getString();
Lex();

// Get rid of the enclosing quotes.
Filename = Filename.substr(1, Filename.size() - 2);

// Save the SMLoc, Filename and LineNumber for later use by diagnostics.
CppHashInfo.Loc = L;
CppHashInfo.Filename = Filename;
CppHashInfo.LineNumber = LineNumber;
CppHashInfo.Buf = CurBuffer;
return false;
2269}

2271/// will use the last parsed cpp hash line filename comment
2272/// for the Filename and LineNo if any in the diagnostic.
2273void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
const AsmParser *Parser = static_cast<const AsmParser *>(Context);
raw_ostream &OS = errs();

const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr();
SMLoc DiagLoc = Diag.getLoc();
unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
unsigned CppHashBuf =
    Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashInfo.Loc);

// Like SourceMgr::printMessage() we need to print the include stack if any
// before printing the message.
unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
if (!Parser->SavedDiagHandler && DiagCurBuffer &&
    DiagCurBuffer != DiagSrcMgr.getMainFileID()) {
  SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer);
  DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS);
}

// If we have not parsed a cpp hash line filename comment or the source
// manager changed or buffer changed (like in a nested include) then just
// print the normal diagnostic using its Filename and LineNo.
if (!Parser->CppHashInfo.LineNumber || &DiagSrcMgr != &Parser->SrcMgr ||
    DiagBuf != CppHashBuf) {
  if (Parser->SavedDiagHandler)
    Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
  else
    Diag.print(nullptr, OS);
  return;
}

// Use the CppHashFilename and calculate a line number based on the
// CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc
// for the diagnostic.
const std::string &Filename = Parser->CppHashInfo.Filename;

int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf);
int CppHashLocLineNo =
    Parser->SrcMgr.FindLineNumber(Parser->CppHashInfo.Loc, CppHashBuf);
int LineNo =
    Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo);

SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo,
                     Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(),
                     Diag.getLineContents(), Diag.getRanges());

if (Parser->SavedDiagHandler)
  Parser->SavedDiagHandler(NewDiag, Parser->SavedDiagContext);
else
  NewDiag.print(nullptr, OS);
2323}

2325// FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The
2326// difference being that that function accepts '@' as part of identifiers and
2327// we can't do that. AsmLexer.cpp should probably be changed to handle
2328// '@' as a special case when needed.
2329static bool isIdentifierChar(char c) {
return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' ||
       c == '.';
2332}

2334bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
                          ArrayRef<MCAsmMacroParameter> Parameters,
                          ArrayRef<MCAsmMacroArgument> A,
                          bool EnableAtPseudoVariable, SMLoc L) {
unsigned NParameters = Parameters.size();
bool HasVararg = NParameters ? Parameters.back().Vararg : false;
if ((!IsDarwin || NParameters != 0) && NParameters != A.size())
  return Error(L, "Wrong number of arguments");

// A macro without parameters is handled differently on Darwin:
// gas accepts no arguments and does no substitutions
while (!Body.empty()) {
  // Scan for the next substitution.
  std::size_t End = Body.size(), Pos = 0;
  for (; Pos != End; ++Pos) {
    // Check for a substitution or escape.
    if (IsDarwin && !NParameters) {
      // This macro has no parameters, look for $0, $1, etc.
      if (Body[Pos] != '$' || Pos + 1 == End)
        continue;

      char Next = Body[Pos + 1];
      if (Next == '$' || Next == 'n' ||
          isdigit(static_cast<unsigned char>(Next)))
        break;
    } else {
      // This macro has parameters, look for \foo, \bar, etc.
      if (Body[Pos] == '\\' && Pos + 1 != End)
        break;
    }
  }

  // Add the prefix.
  OS << Body.slice(0, Pos);

  // Check if we reached the end.
  if (Pos == End)
    break;

  if (IsDarwin && !NParameters) {
    switch (Body[Pos + 1]) {
    // $$ => $
    case '$':
      OS << '$';
      break;

    // $n => number of arguments
    case 'n':
      OS << A.size();
      break;

    // $[0-9] => argument
    default: {
      // Missing arguments are ignored.
      unsigned Index = Body[Pos + 1] - '0';
      if (Index >= A.size())
        break;

      // Otherwise substitute with the token values, with spaces eliminated.
      for (const AsmToken &Token : A[Index])
        OS << Token.getString();
      break;
    }
    }
    Pos += 2;
  } else {
    unsigned I = Pos + 1;

    // Check for the \@ pseudo-variable.
    if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End)
      ++I;
    else
      while (isIdentifierChar(Body[I]) && I + 1 != End)
        ++I;

    const char *Begin = Body.data() + Pos + 1;
    StringRef Argument(Begin, I - (Pos + 1));
    unsigned Index = 0;

    if (Argument == "@") {
      OS << NumOfMacroInstantiations;
      Pos += 2;
    } else {
      for (; Index < NParameters; ++Index)
        if (Parameters[Index].Name == Argument)
          break;

      if (Index == NParameters) {
        if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
          Pos += 3;
        else {
          OS << '\\' << Argument;
          Pos = I;
        }
      } else {
        bool VarargParameter = HasVararg && Index == (NParameters - 1);
        for (const AsmToken &Token : A[Index])
          // For altmacro mode, you can write '%expr'.
          // The prefix '%' evaluates the expression 'expr'
          // and uses the result as a string (e.g. replace %(1+2) with the string "3").
          // Here, we identify the integer token which is the result of the
          // absolute expression evaluation and replace it with its string representation.
          if ((Lexer.IsaAltMacroMode()) &&
               (*(Token.getString().begin()) == '%') && Token.is(AsmToken::Integer))
            // Emit an integer value to the buffer.
            OS << Token.getIntVal();
          // Only Token that was validated as a string and begins with '<'
          // is considered altMacroString!!!
          else if ((Lexer.IsaAltMacroMode()) &&
                   (*(Token.getString().begin()) == '<') &&
                   Token.is(AsmToken::String)) {
            std::string Res;
            altMacroString(Token.getStringContents(), Res);
            OS << Res;
          }
          // We expect no quotes around the string's contents when
          // parsing for varargs.
          else if (Token.isNot(AsmToken::String) || VarargParameter)
            OS << Token.getString();
          else
            OS << Token.getStringContents();

        Pos += 1 + Argument.size();
      }
    }
  }
  // Update the scan point.
  Body = Body.substr(Pos);
}

return false;
2465}

2467MacroInstantiation::MacroInstantiation(SMLoc IL, int EB, SMLoc EL,
                                     size_t CondStackDepth)
  : InstantiationLoc(IL), ExitBuffer(EB), ExitLoc(EL),
    CondStackDepth(CondStackDepth) {}

2472static bool isOperator(AsmToken::TokenKind kind) {
switch (kind) {
default:
  return false;
case AsmToken::Plus:
case AsmToken::Minus:
case AsmToken::Tilde:
case AsmToken::Slash:
case AsmToken::Star:
case AsmToken::Dot:
case AsmToken::Equal:
case AsmToken::EqualEqual:
case AsmToken::Pipe:
case AsmToken::PipePipe:
case AsmToken::Caret:
case AsmToken::Amp:
case AsmToken::AmpAmp:
case AsmToken::Exclaim:
case AsmToken::ExclaimEqual:
case AsmToken::Less:
case AsmToken::LessEqual:
case AsmToken::LessLess:
case AsmToken::LessGreater:
case AsmToken::Greater:
case AsmToken::GreaterEqual:
case AsmToken::GreaterGreater:
  return true;
}
2500}

2502namespace {

2504class AsmLexerSkipSpaceRAII {
2505public:
AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) {
  Lexer.setSkipSpace(SkipSpace);
}

~AsmLexerSkipSpaceRAII() {
  Lexer.setSkipSpace(true);
}

2514private:
AsmLexer &Lexer;
2516};

2518} // end anonymous namespace

2520bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) {

if (Vararg) {
  if (Lexer.isNot(AsmToken::EndOfStatement)) {
    StringRef Str = parseStringToEndOfStatement();
    MA.emplace_back(AsmToken::String, Str);
  }
  return false;
}

unsigned ParenLevel = 0;

// Darwin doesn't use spaces to delmit arguments.
AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin);

bool SpaceEaten;

while (true) {
  SpaceEaten = false;
  if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal))
    return TokError("unexpected token in macro instantiation");

  if (ParenLevel == 0) {

    if (Lexer.is(AsmToken::Comma))
      break;

    if (Lexer.is(AsmToken::Space)) {
      SpaceEaten = true;
      Lexer.Lex(); // Eat spaces
    }

    // Spaces can delimit parameters, but could also be part an expression.
    // If the token after a space is an operator, add the token and the next
    // one into this argument
    if (!IsDarwin) {
      if (isOperator(Lexer.getKind())) {
        MA.push_back(getTok());
        Lexer.Lex();

        // Whitespace after an operator can be ignored.
        if (Lexer.is(AsmToken::Space))
          Lexer.Lex();

        continue;
      }
    }
    if (SpaceEaten)
      break;
  }

  // handleMacroEntry relies on not advancing the lexer here
  // to be able to fill in the remaining default parameter values
  if (Lexer.is(AsmToken::EndOfStatement))
    break;

  // Adjust the current parentheses level.
  if (Lexer.is(AsmToken::LParen))
    ++ParenLevel;
  else if (Lexer.is(AsmToken::RParen) && ParenLevel)
    --ParenLevel;

  // Append the token to the current argument list.
  MA.push_back(getTok());
  Lexer.Lex();
}

if (ParenLevel != 0)
  return TokError("unbalanced parentheses in macro argument");
return false;
2590}

2592// Parse the macro instantiation arguments.
2593bool AsmParser::parseMacroArguments(const MCAsmMacro *M,
                                  MCAsmMacroArguments &A) {
const unsigned NParameters = M ? M->Parameters.size() : 0;
bool NamedParametersFound = false;
SmallVector<SMLoc, 4> FALocs;

A.resize(NParameters);
FALocs.resize(NParameters);

// Parse two kinds of macro invocations:
// - macros defined without any parameters accept an arbitrary number of them
// - macros defined with parameters accept at most that many of them
bool HasVararg = NParameters ? M->Parameters.back().Vararg : false;
for (unsigned Parameter = 0; !NParameters || Parameter < NParameters;
     ++Parameter) {
  SMLoc IDLoc = Lexer.getLoc();
  MCAsmMacroParameter FA;

  if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) {
    if (parseIdentifier(FA.Name))
      return Error(IDLoc, "invalid argument identifier for formal argument");

    if (Lexer.isNot(AsmToken::Equal))
      return TokError("expected '=' after formal parameter identifier");

    Lex();

    NamedParametersFound = true;
  }
  bool Vararg = HasVararg && Parameter == (NParameters - 1);

  if (NamedParametersFound && FA.Name.empty())
    return Error(IDLoc, "cannot mix positional and keyword arguments");

  SMLoc StrLoc = Lexer.getLoc();
  SMLoc EndLoc;
  if (Lexer.IsaAltMacroMode() && Lexer.is(AsmToken::Percent)) {
      const MCExpr *AbsoluteExp;
      int64_t Value;
      /// Eat '%'
      Lex();
      if (parseExpression(AbsoluteExp, EndLoc))
        return false;
      if (!AbsoluteExp->evaluateAsAbsolute(Value,
                                           getStreamer().getAssemblerPtr()))
        return Error(StrLoc, "expected absolute expression");
      const char *StrChar = StrLoc.getPointer();
      const char *EndChar = EndLoc.getPointer();
      AsmToken newToken(AsmToken::Integer, StringRef(StrChar , EndChar - StrChar), Value);
      FA.Value.push_back(newToken);
  } else if (Lexer.IsaAltMacroMode() && Lexer.is(AsmToken::Less) &&
             isAltmacroString(StrLoc, EndLoc)) {
      const char *StrChar = StrLoc.getPointer();
      const char *EndChar = EndLoc.getPointer();
      jumpToLoc(EndLoc, CurBuffer);
      /// Eat from '<' to '>'
      Lex();
      AsmToken newToken(AsmToken::String, StringRef(StrChar, EndChar - StrChar));
      FA.Value.push_back(newToken);
  } else if(parseMacroArgument(FA.Value, Vararg))
      return true;

  unsigned PI = Parameter;
  if (!FA.Name.empty()) {
    unsigned FAI = 0;
    for (FAI = 0; FAI < NParameters; ++FAI)
      if (M->Parameters[FAI].Name == FA.Name)
        break;

    if (FAI >= NParameters) {
      assert(M && "expected macro to be defined")(static_cast <bool> (M && "expected macro to be defined"
) ? void (0) : __assert_fail ("M && \"expected macro to be defined\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 2663, __extension__ __PRETTY_FUNCTION__));
      return Error(IDLoc, "parameter named '" + FA.Name +
                              "' does not exist for macro '" + M->Name + "'");
    }
    PI = FAI;
  }

  if (!FA.Value.empty()) {
    if (A.size() <= PI)
      A.resize(PI + 1);
    A[PI] = FA.Value;

    if (FALocs.size() <= PI)
      FALocs.resize(PI + 1);

    FALocs[PI] = Lexer.getLoc();
  }

  // At the end of the statement, fill in remaining arguments that have
  // default values. If there aren't any, then the next argument is
  // required but missing
  if (Lexer.is(AsmToken::EndOfStatement)) {
    bool Failure = false;
    for (unsigned FAI = 0; FAI < NParameters; ++FAI) {
      if (A[FAI].empty()) {
        if (M->Parameters[FAI].Required) {
          Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(),
                "missing value for required parameter "
                "'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'");
          Failure = true;
        }

        if (!M->Parameters[FAI].Value.empty())
          A[FAI] = M->Parameters[FAI].Value;
      }
    }
    return Failure;
  }

  if (Lexer.is(AsmToken::Comma))
    Lex();
}

return TokError("too many positional arguments");
2707}

2709bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) {
// Arbitrarily limit macro nesting depth (default matches 'as'). We can
// eliminate this, although we should protect against infinite loops.
unsigned MaxNestingDepth = AsmMacroMaxNestingDepth;
if (ActiveMacros.size() == MaxNestingDepth) {
  std::ostringstream MaxNestingDepthError;
  MaxNestingDepthError << "macros cannot be nested more than "
                       << MaxNestingDepth << " levels deep."
                       << " Use -asm-macro-max-nesting-depth to increase "
                          "this limit.";
  return TokError(MaxNestingDepthError.str());
}

MCAsmMacroArguments A;
if (parseMacroArguments(M, A))
  return true;

// Macro instantiation is lexical, unfortunately. We construct a new buffer
// to hold the macro body with substitutions.
SmallString<256> Buf;
StringRef Body = M->Body;
raw_svector_ostream OS(Buf);

if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc()))
  return true;

// We include the .endmacro in the buffer as our cue to exit the macro
// instantiation.
OS << ".endmacro\n";

std::unique_ptr<MemoryBuffer> Instantiation =
    MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");

// Create the macro instantiation object and add to the current macro
// instantiation stack.
MacroInstantiation *MI = new MacroInstantiation(
    NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size());
ActiveMacros.push_back(MI);

++NumOfMacroInstantiations;

// Jump to the macro instantiation and prime the lexer.
CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
Lex();

return false;
2756}

2758void AsmParser::handleMacroExit() {
// Jump to the EndOfStatement we should return to, and consume it.
jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer);
Lex();

// Pop the instantiation entry.
delete ActiveMacros.back();
ActiveMacros.pop_back();
2766}

2768bool AsmParser::parseAssignment(StringRef Name, bool allow_redef,
                              bool NoDeadStrip, bool AllowExtendedExpr) {
MCSymbol *Sym;
20
←
'Sym' declared without an initial value→
const MCExpr *Value;
if (MCParserUtils::parseAssignmentExpression(Name, allow_redef, *this, Sym,
21
←
Calling 'parseAssignmentExpression'→
26
←
Returning from 'parseAssignmentExpression'→
27
←
Assuming the condition is false→
28
←
Taking false branch→
                                             Value, AllowExtendedExpr))
  return true;

if (!Sym) {
29
←
Branch condition evaluates to a garbage value
  // In the case where we parse an expression starting with a '.', we will
  // not generate an error, nor will we create a symbol.  In this case we
  // should just return out.
  return false;
}

// Do the assignment.
Out.EmitAssignment(Sym, Value);
if (NoDeadStrip)
  Out.EmitSymbolAttribute(Sym, MCSA_NoDeadStrip);

return false;
2789}

2791/// parseIdentifier:
2792///   ::= identifier
2793///   ::= string
2794bool AsmParser::parseIdentifier(StringRef &Res) {
// The assembler has relaxed rules for accepting identifiers, in particular we
// allow things like '.globl $foo' and '.def @feat.00', which would normally be
// separate tokens. At this level, we have already lexed so we cannot (currently)
// handle this as a context dependent token, instead we detect adjacent tokens
// and return the combined identifier.
if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) {
  SMLoc PrefixLoc = getLexer().getLoc();

  // Consume the prefix character, and check for a following identifier.

  AsmToken Buf[1];
  Lexer.peekTokens(Buf, false);

  if (Buf[0].isNot(AsmToken::Identifier))
    return true;

  // We have a '$' or '@' followed by an identifier, make sure they are adjacent.
  if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer())
    return true;

  // eat $ or @
  Lexer.Lex(); // Lexer's Lex guarantees consecutive token.
  // Construct the joined identifier and consume the token.
  Res =
      StringRef(PrefixLoc.getPointer(), getTok().getIdentifier().size() + 1);
  Lex(); // Parser Lex to maintain invariants.
  return false;
}

if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String))
  return true;

Res = getTok().getIdentifier();

Lex(); // Consume the identifier token.

return false;
2832}

2834/// parseDirectiveSet:
2835///   ::= .equ identifier ',' expression
2836///   ::= .equiv identifier ',' expression
2837///   ::= .set identifier ',' expression
2838bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) {
StringRef Name;
if (check(parseIdentifier(Name), "expected identifier") ||
    parseToken(AsmToken::Comma) || parseAssignment(Name, allow_redef, true))
  return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
return false;
2844}

2846bool AsmParser::parseEscapedString(std::string &Data) {
if (check(getTok().isNot(AsmToken::String), "expected string"))
  return true;

Data = "";
StringRef Str = getTok().getStringContents();
for (unsigned i = 0, e = Str.size(); i != e; ++i) {
  if (Str[i] != '\\') {
    Data += Str[i];
    continue;
  }

  // Recognize escaped characters. Note that this escape semantics currently
  // loosely follows Darwin 'as'. Notably, it doesn't support hex escapes.
  ++i;
  if (i == e)
    return TokError("unexpected backslash at end of string");

  // Recognize octal sequences.
  if ((unsigned)(Str[i] - '0') <= 7) {
    // Consume up to three octal characters.
    unsigned Value = Str[i] - '0';

    if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
      ++i;
      Value = Value * 8 + (Str[i] - '0');

      if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
        ++i;
        Value = Value * 8 + (Str[i] - '0');
      }
    }

    if (Value > 255)
      return TokError("invalid octal escape sequence (out of range)");

    Data += (unsigned char)Value;
    continue;
  }

  // Otherwise recognize individual escapes.
  switch (Str[i]) {
  default:
    // Just reject invalid escape sequences for now.
    return TokError("invalid escape sequence (unrecognized character)");

  case 'b': Data += '\b'; break;
  case 'f': Data += '\f'; break;
  case 'n': Data += '\n'; break;
  case 'r': Data += '\r'; break;
  case 't': Data += '\t'; break;
  case '"': Data += '"'; break;
  case '\\': Data += '\\'; break;
  }
}

Lex();
return false;
2904}

2906/// parseDirectiveAscii:
2907///   ::= ( .ascii | .asciz | .string ) [ "string" ( , "string" )* ]
2908bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) {
auto parseOp = [&]() -> bool {
  std::string Data;
  if (checkForValidSection() || parseEscapedString(Data))
    return true;
  getStreamer().EmitBytes(Data);
  if (ZeroTerminated)
    getStreamer().EmitBytes(StringRef("\0", 1));
  return false;
};

if (parseMany(parseOp))
  return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
return false;
2922}

2924/// parseDirectiveReloc
2925///  ::= .reloc expression , identifier [ , expression ]
2926bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) {
const MCExpr *Offset;
const MCExpr *Expr = nullptr;

SMLoc OffsetLoc = Lexer.getTok().getLoc();
int64_t OffsetValue;
// We can only deal with constant expressions at the moment.

if (parseExpression(Offset))
  return true;

if (check(!Offset->evaluateAsAbsolute(OffsetValue,
                                      getStreamer().getAssemblerPtr()),
          OffsetLoc, "expression is not a constant value") ||
    check(OffsetValue < 0, OffsetLoc, "expression is negative") ||
    parseToken(AsmToken::Comma, "expected comma") ||
    check(getTok().isNot(AsmToken::Identifier), "expected relocation name"))
  return true;

SMLoc NameLoc = Lexer.getTok().getLoc();
StringRef Name = Lexer.getTok().getIdentifier();
Lex();

if (Lexer.is(AsmToken::Comma)) {
  Lex();
  SMLoc ExprLoc = Lexer.getLoc();
  if (parseExpression(Expr))
    return true;

  MCValue Value;
  if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr))
    return Error(ExprLoc, "expression must be relocatable");
}

if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in .reloc directive"))
    return true;

const MCTargetAsmParser &MCT = getTargetParser();
const MCSubtargetInfo &STI = MCT.getSTI();
if (getStreamer().EmitRelocDirective(*Offset, Name, Expr, DirectiveLoc, STI))
  return Error(NameLoc, "unknown relocation name");

return false;
2970}

2972/// parseDirectiveValue
2973///  ::= (.byte | .short | ... ) [ expression (, expression)* ]
2974bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) {
auto parseOp = [&]() -> bool {
  const MCExpr *Value;
  SMLoc ExprLoc = getLexer().getLoc();
  if (checkForValidSection() || parseExpression(Value))
    return true;
  // Special case constant expressions to match code generator.
  if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
    assert(Size <= 8 && "Invalid size")(static_cast <bool> (Size <= 8 && "Invalid size"
) ? void (0) : __assert_fail ("Size <= 8 && \"Invalid size\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 2982, __extension__ __PRETTY_FUNCTION__));
    uint64_t IntValue = MCE->getValue();
    if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
      return Error(ExprLoc, "out of range literal value");
    getStreamer().EmitIntValue(IntValue, Size);
  } else
    getStreamer().EmitValue(Value, Size, ExprLoc);
  return false;
};

if (parseMany(parseOp))
  return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
return false;
2995}

2997static bool parseHexOcta(AsmParser &Asm, uint64_t &hi, uint64_t &lo) {
if (Asm.getTok().isNot(AsmToken::Integer) &&
    Asm.getTok().isNot(AsmToken::BigNum))
  return Asm.TokError("unknown token in expression");
SMLoc ExprLoc = Asm.getTok().getLoc();
APInt IntValue = Asm.getTok().getAPIntVal();
Asm.Lex();
if (!IntValue.isIntN(128))
  return Asm.Error(ExprLoc, "out of range literal value");
if (!IntValue.isIntN(64)) {
  hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue();
  lo = IntValue.getLoBits(64).getZExtValue();
} else {
  hi = 0;
  lo = IntValue.getZExtValue();
}
return false;
3014}

3016/// ParseDirectiveOctaValue
3017///  ::= .octa [ hexconstant (, hexconstant)* ]

3019bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) {
auto parseOp = [&]() -> bool {
  if (checkForValidSection())
    return true;
  uint64_t hi, lo;
  if (parseHexOcta(*this, hi, lo))
    return true;
  if (MAI.isLittleEndian()) {
    getStreamer().EmitIntValue(lo, 8);
    getStreamer().EmitIntValue(hi, 8);
  } else {
    getStreamer().EmitIntValue(hi, 8);
    getStreamer().EmitIntValue(lo, 8);
  }
  return false;
};

if (parseMany(parseOp))
  return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
return false;
3039}

3041bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) {
// We don't truly support arithmetic on floating point expressions, so we
// have to manually parse unary prefixes.
bool IsNeg = false;
if (getLexer().is(AsmToken::Minus)) {
  Lexer.Lex();
  IsNeg = true;
} else if (getLexer().is(AsmToken::Plus))
  Lexer.Lex();

if (Lexer.is(AsmToken::Error))
  return TokError(Lexer.getErr());
if (Lexer.isNot(AsmToken::Integer) && Lexer.isNot(AsmToken::Real) &&
    Lexer.isNot(AsmToken::Identifier))
  return TokError("unexpected token in directive");

// Convert to an APFloat.
APFloat Value(Semantics);
StringRef IDVal = getTok().getString();
if (getLexer().is(AsmToken::Identifier)) {
  if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf"))
    Value = APFloat::getInf(Semantics);
  else if (!IDVal.compare_lower("nan"))
    Value = APFloat::getNaN(Semantics, false, ~0);
  else
    return TokError("invalid floating point literal");
} else if (Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven) ==
           APFloat::opInvalidOp)
  return TokError("invalid floating point literal");
if (IsNeg)
  Value.changeSign();

// Consume the numeric token.
Lex();

Res = Value.bitcastToAPInt();

return false;
3079}

3081/// parseDirectiveRealValue
3082///  ::= (.single | .double) [ expression (, expression)* ]
3083bool AsmParser::parseDirectiveRealValue(StringRef IDVal,
                                      const fltSemantics &Semantics) {
auto parseOp = [&]() -> bool {
  APInt AsInt;
  if (checkForValidSection() || parseRealValue(Semantics, AsInt))
    return true;
  getStreamer().EmitIntValue(AsInt.getLimitedValue(),
                             AsInt.getBitWidth() / 8);
  return false;
};

if (parseMany(parseOp))
  return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
return false;
3097}

3099/// parseDirectiveZero
3100///  ::= .zero expression
3101bool AsmParser::parseDirectiveZero() {
SMLoc NumBytesLoc = Lexer.getLoc();
const MCExpr *NumBytes;
if (checkForValidSection() || parseExpression(NumBytes))
  return true;

int64_t Val = 0;
if (getLexer().is(AsmToken::Comma)) {
  Lex();
  if (parseAbsoluteExpression(Val))
    return true;
}

if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '.zero' directive"))
  return true;
getStreamer().emitFill(*NumBytes, Val, NumBytesLoc);

return false;
3120}

3122/// parseDirectiveFill
3123///  ::= .fill expression [ , expression [ , expression ] ]
3124bool AsmParser::parseDirectiveFill() {
SMLoc NumValuesLoc = Lexer.getLoc();
const MCExpr *NumValues;
if (checkForValidSection() || parseExpression(NumValues))
  return true;

int64_t FillSize = 1;
int64_t FillExpr = 0;

SMLoc SizeLoc, ExprLoc;

if (parseOptionalToken(AsmToken::Comma)) {
  SizeLoc = getTok().getLoc();
  if (parseAbsoluteExpression(FillSize))
    return true;
  if (parseOptionalToken(AsmToken::Comma)) {
    ExprLoc = getTok().getLoc();
    if (parseAbsoluteExpression(FillExpr))
      return true;
  }
}
if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '.fill' directive"))
  return true;

if (FillSize < 0) {
  Warning(SizeLoc, "'.fill' directive with negative size has no effect");
  return false;
}
if (FillSize > 8) {
  Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8");
  FillSize = 8;
}

if (!isUInt<32>(FillExpr) && FillSize > 4)
  Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits");

getStreamer().emitFill(*NumValues, FillSize, FillExpr, NumValuesLoc);

return false;
3164}

3166/// parseDirectiveOrg
3167///  ::= .org expression [ , expression ]
3168bool AsmParser::parseDirectiveOrg() {
const MCExpr *Offset;
SMLoc OffsetLoc = Lexer.getLoc();
if (checkForValidSection() || parseExpression(Offset))
  return true;

// Parse optional fill expression.
int64_t FillExpr = 0;
if (parseOptionalToken(AsmToken::Comma))
  if (parseAbsoluteExpression(FillExpr))
    return addErrorSuffix(" in '.org' directive");
if (parseToken(AsmToken::EndOfStatement))
  return addErrorSuffix(" in '.org' directive");

getStreamer().emitValueToOffset(Offset, FillExpr, OffsetLoc);
return false;
3184}

3186/// parseDirectiveAlign
3187///  ::= {.align, ...} expression [ , expression [ , expression ]]
3188bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
SMLoc AlignmentLoc = getLexer().getLoc();
int64_t Alignment;
SMLoc MaxBytesLoc;
bool HasFillExpr = false;
int64_t FillExpr = 0;
int64_t MaxBytesToFill = 0;

auto parseAlign = [&]() -> bool {
  if (parseAbsoluteExpression(Alignment))
    return true;
  if (parseOptionalToken(AsmToken::Comma)) {
    // The fill expression can be omitted while specifying a maximum number of
    // alignment bytes, e.g:
    //  .align 3,,4
    if (getTok().isNot(AsmToken::Comma)) {
      HasFillExpr = true;
      if (parseAbsoluteExpression(FillExpr))
        return true;
    }
    if (parseOptionalToken(AsmToken::Comma))
      if (parseTokenLoc(MaxBytesLoc) ||
          parseAbsoluteExpression(MaxBytesToFill))
        return true;
  }
  return parseToken(AsmToken::EndOfStatement);
};

if (checkForValidSection())
  return addErrorSuffix(" in directive");
// Ignore empty '.p2align' directives for GNU-as compatibility
if (IsPow2 && (ValueSize == 1) && getTok().is(AsmToken::EndOfStatement)) {
  Warning(AlignmentLoc, "p2align directive with no operand(s) is ignored");
  return parseToken(AsmToken::EndOfStatement);
}
if (parseAlign())
  return addErrorSuffix(" in directive");

// Always emit an alignment here even if we thrown an error.
bool ReturnVal = false;

// Compute alignment in bytes.
if (IsPow2) {
  // FIXME: Diagnose overflow.
  if (Alignment >= 32) {
    ReturnVal |= Error(AlignmentLoc, "invalid alignment value");
    Alignment = 31;
  }

  Alignment = 1ULL << Alignment;
} else {
  // Reject alignments that aren't either a power of two or zero,
  // for gas compatibility. Alignment of zero is silently rounded
  // up to one.
  if (Alignment == 0)
    Alignment = 1;
  if (!isPowerOf2_64(Alignment))
    ReturnVal |= Error(AlignmentLoc, "alignment must be a power of 2");
}

// Diagnose non-sensical max bytes to align.
if (MaxBytesLoc.isValid()) {
  if (MaxBytesToFill < 1) {
    ReturnVal |= Error(MaxBytesLoc,
                       "alignment directive can never be satisfied in this "
                       "many bytes, ignoring maximum bytes expression");
    MaxBytesToFill = 0;
  }

  if (MaxBytesToFill >= Alignment) {
    Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and "
                         "has no effect");
    MaxBytesToFill = 0;
  }
}

// Check whether we should use optimal code alignment for this .align
// directive.
const MCSection *Section = getStreamer().getCurrentSectionOnly();
assert(Section && "must have section to emit alignment")(static_cast <bool> (Section && "must have section to emit alignment"
) ? void (0) : __assert_fail ("Section && \"must have section to emit alignment\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 3267, __extension__ __PRETTY_FUNCTION__));
bool UseCodeAlign = Section->UseCodeAlign();
if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) &&
    ValueSize == 1 && UseCodeAlign) {
  getStreamer().EmitCodeAlignment(Alignment, MaxBytesToFill);
} else {
  // FIXME: Target specific behavior about how the "extra" bytes are filled.
  getStreamer().EmitValueToAlignment(Alignment, FillExpr, ValueSize,
                                     MaxBytesToFill);
}

return ReturnVal;
3279}

3281/// parseDirectiveFile
3282/// ::= .file filename
3283/// ::= .file number [directory] filename [md5 checksum] [source source-text]
3284bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) {
// FIXME: I'm not sure what this is.
int64_t FileNumber = -1;
if (getLexer().is(AsmToken::Integer)) {
  FileNumber = getTok().getIntVal();
  Lex();

  if (FileNumber < 0)
    return TokError("negative file number");
}

std::string Path;

// Usually the directory and filename together, otherwise just the directory.
// Allow the strings to have escaped octal character sequence.
if (check(getTok().isNot(AsmToken::String),
          "unexpected token in '.file' directive") ||
    parseEscapedString(Path))
  return true;

StringRef Directory;
StringRef Filename;
std::string FilenameData;
if (getLexer().is(AsmToken::String)) {
  if (check(FileNumber == -1,
            "explicit path specified, but no file number") ||
      parseEscapedString(FilenameData))
    return true;
  Filename = FilenameData;
  Directory = Path;
} else {
  Filename = Path;
}

uint64_t MD5Hi, MD5Lo;
bool HasMD5 = false;

Optional<StringRef> Source;
bool HasSource = false;
std::string SourceString;

while (!parseOptionalToken(AsmToken::EndOfStatement)) {
  StringRef Keyword;
  if (check(getTok().isNot(AsmToken::Identifier),
            "unexpected token in '.file' directive") ||
      parseIdentifier(Keyword))
    return true;
  if (Keyword == "md5") {
    HasMD5 = true;
    if (check(FileNumber == -1,
              "MD5 checksum specified, but no file number") ||
        parseHexOcta(*this, MD5Hi, MD5Lo))
      return true;
  } else if (Keyword == "source") {
    HasSource = true;
    if (check(FileNumber == -1,
              "source specified, but no file number") ||
        check(getTok().isNot(AsmToken::String),
              "unexpected token in '.file' directive") ||
        parseEscapedString(SourceString))
      return true;
  } else {
    return TokError("unexpected token in '.file' directive");
  }
}

// In case there is a -g option as well as debug info from directive .file,
// we turn off the -g option, directly use the existing debug info instead.
// Also reset any implicit ".file 0" for the assembler source.
if (Ctx.getGenDwarfForAssembly()) {
  Ctx.getMCDwarfLineTable(0).resetRootFile();
  Ctx.setGenDwarfForAssembly(false);
}

if (FileNumber == -1)
  getStreamer().EmitFileDirective(Filename);
else {
  MD5::MD5Result *CKMem = nullptr;
  if (HasMD5) {
    CKMem = (MD5::MD5Result *)Ctx.allocate(sizeof(MD5::MD5Result), 1);
    for (unsigned i = 0; i != 8; ++i) {
      CKMem->Bytes[i] = uint8_t(MD5Hi >> ((7 - i) * 8));
      CKMem->Bytes[i + 8] = uint8_t(MD5Lo >> ((7 - i) * 8));
    }
  }
  if (HasSource) {
    char *SourceBuf = static_cast<char *>(Ctx.allocate(SourceString.size()));
    memcpy(SourceBuf, SourceString.data(), SourceString.size());
    Source = StringRef(SourceBuf, SourceString.size());
  }
  if (FileNumber == 0) {
    if (Ctx.getDwarfVersion() < 5)
      return Warning(DirectiveLoc, "file 0 not supported prior to DWARF-5");
    getStreamer().emitDwarfFile0Directive(Directory, Filename, CKMem, Source);
  } else {
    Expected<unsigned> FileNumOrErr = getStreamer().tryEmitDwarfFileDirective(
        FileNumber, Directory, Filename, CKMem, Source);
    if (!FileNumOrErr)
      return Error(DirectiveLoc, toString(FileNumOrErr.takeError()));
    FileNumber = FileNumOrErr.get();
  }
  // Alert the user if there are some .file directives with MD5 and some not.
  // But only do that once.
  if (!ReportedInconsistentMD5 && !Ctx.isDwarfMD5UsageConsistent(0)) {
    ReportedInconsistentMD5 = true;
    return Warning(DirectiveLoc, "inconsistent use of MD5 checksums");
  }
}

return false;
3394}

3396/// parseDirectiveLine
3397/// ::= .line [number]
3398bool AsmParser::parseDirectiveLine() {
int64_t LineNumber;
if (getLexer().is(AsmToken::Integer)) {
  if (parseIntToken(LineNumber, "unexpected token in '.line' directive"))
    return true;
  (void)LineNumber;
  // FIXME: Do something with the .line.
}
if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '.line' directive"))
  return true;

return false;
3411}

3413/// parseDirectiveLoc
3414/// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end]
3415///                                [epilogue_begin] [is_stmt VALUE] [isa VALUE]
3416/// The first number is a file number, must have been previously assigned with
3417/// a .file directive, the second number is the line number and optionally the
3418/// third number is a column position (zero if not specified).  The remaining
3419/// optional items are .loc sub-directives.
3420bool AsmParser::parseDirectiveLoc() {
int64_t FileNumber = 0, LineNumber = 0;
SMLoc Loc = getTok().getLoc();
if (parseIntToken(FileNumber, "unexpected token in '.loc' directive") ||
    check(FileNumber < 1 && Ctx.getDwarfVersion() < 5, Loc,
          "file number less than one in '.loc' directive") ||
    check(!getContext().isValidDwarfFileNumber(FileNumber), Loc,
          "unassigned file number in '.loc' directive"))
  return true;

// optional
if (getLexer().is(AsmToken::Integer)) {
  LineNumber = getTok().getIntVal();
  if (LineNumber < 0)
    return TokError("line number less than zero in '.loc' directive");
  Lex();
}

int64_t ColumnPos = 0;
if (getLexer().is(AsmToken::Integer)) {
  ColumnPos = getTok().getIntVal();
  if (ColumnPos < 0)
    return TokError("column position less than zero in '.loc' directive");
  Lex();
}

unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT1 ? DWARF2_FLAG_IS_STMT(1 << 0) : 0;
unsigned Isa = 0;
int64_t Discriminator = 0;

auto parseLocOp = [&]() -> bool {
  StringRef Name;
  SMLoc Loc = getTok().getLoc();
  if (parseIdentifier(Name))
    return TokError("unexpected token in '.loc' directive");

  if (Name == "basic_block")
    Flags |= DWARF2_FLAG_BASIC_BLOCK(1 << 1);
  else if (Name == "prologue_end")
    Flags |= DWARF2_FLAG_PROLOGUE_END(1 << 2);
  else if (Name == "epilogue_begin")
    Flags |= DWARF2_FLAG_EPILOGUE_BEGIN(1 << 3);
  else if (Name == "is_stmt") {
    Loc = getTok().getLoc();
    const MCExpr *Value;
    if (parseExpression(Value))
      return true;
    // The expression must be the constant 0 or 1.
    if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
      int Value = MCE->getValue();
      if (Value == 0)
        Flags &= ~DWARF2_FLAG_IS_STMT(1 << 0);
      else if (Value == 1)
        Flags |= DWARF2_FLAG_IS_STMT(1 << 0);
      else
        return Error(Loc, "is_stmt value not 0 or 1");
    } else {
      return Error(Loc, "is_stmt value not the constant value of 0 or 1");
    }
  } else if (Name == "isa") {
    Loc = getTok().getLoc();
    const MCExpr *Value;
    if (parseExpression(Value))
      return true;
    // The expression must be a constant greater or equal to 0.
    if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
      int Value = MCE->getValue();
      if (Value < 0)
        return Error(Loc, "isa number less than zero");
      Isa = Value;
    } else {
      return Error(Loc, "isa number not a constant value");
    }
  } else if (Name == "discriminator") {
    if (parseAbsoluteExpression(Discriminator))
      return true;
  } else {
    return Error(Loc, "unknown sub-directive in '.loc' directive");
  }
  return false;
};

if (parseMany(parseLocOp, false /*hasComma*/))
  return true;

getStreamer().EmitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags,
                                    Isa, Discriminator, StringRef());

return false;
3509}

3511/// parseDirectiveStabs
3512/// ::= .stabs string, number, number, number
3513bool AsmParser::parseDirectiveStabs() {
return TokError("unsupported directive '.stabs'");
3515}

3517/// parseDirectiveCVFile
3518/// ::= .cv_file number filename [checksum] [checksumkind]
3519bool AsmParser::parseDirectiveCVFile() {
SMLoc FileNumberLoc = getTok().getLoc();
int64_t FileNumber;
std::string Filename;
std::string Checksum;
int64_t ChecksumKind = 0;

if (parseIntToken(FileNumber,
                  "expected file number in '.cv_file' directive") ||
    check(FileNumber < 1, FileNumberLoc, "file number less than one") ||
    check(getTok().isNot(AsmToken::String),
          "unexpected token in '.cv_file' directive") ||
    parseEscapedString(Filename))
  return true;
if (!parseOptionalToken(AsmToken::EndOfStatement)) {
  if (check(getTok().isNot(AsmToken::String),
            "unexpected token in '.cv_file' directive") ||
      parseEscapedString(Checksum) ||
      parseIntToken(ChecksumKind,
                    "expected checksum kind in '.cv_file' directive") ||
      parseToken(AsmToken::EndOfStatement,
                 "unexpected token in '.cv_file' directive"))
    return true;
}

Checksum = fromHex(Checksum);
void *CKMem = Ctx.allocate(Checksum.size(), 1);
memcpy(CKMem, Checksum.data(), Checksum.size());
ArrayRef<uint8_t> ChecksumAsBytes(reinterpret_cast<const uint8_t *>(CKMem),
                                  Checksum.size());

if (!getStreamer().EmitCVFileDirective(FileNumber, Filename, ChecksumAsBytes,
                                       static_cast<uint8_t>(ChecksumKind)))
  return Error(FileNumberLoc, "file number already allocated");

return false;
3555}

3557bool AsmParser::parseCVFunctionId(int64_t &FunctionId,
                                StringRef DirectiveName) {
SMLoc Loc;
return parseTokenLoc(Loc) ||
       parseIntToken(FunctionId, "expected function id in '" + DirectiveName +
                                     "' directive") ||
       check(FunctionId < 0 || FunctionId >= UINT_MAX(2147483647 *2U +1U), Loc,
             "expected function id within range [0, UINT_MAX)");
3565}

3567bool AsmParser::parseCVFileId(int64_t &FileNumber, StringRef DirectiveName) {
SMLoc Loc;
return parseTokenLoc(Loc) ||
       parseIntToken(FileNumber, "expected integer in '" + DirectiveName +
                                     "' directive") ||
       check(FileNumber < 1, Loc, "file number less than one in '" +
                                      DirectiveName + "' directive") ||
       check(!getCVContext().isValidFileNumber(FileNumber), Loc,
             "unassigned file number in '" + DirectiveName + "' directive");
3576}

3578/// parseDirectiveCVFuncId
3579/// ::= .cv_func_id FunctionId
3580///
3581/// Introduces a function ID that can be used with .cv_loc.
3582bool AsmParser::parseDirectiveCVFuncId() {
SMLoc FunctionIdLoc = getTok().getLoc();
int64_t FunctionId;

if (parseCVFunctionId(FunctionId, ".cv_func_id") ||
    parseToken(AsmToken::EndOfStatement,
               "unexpected token in '.cv_func_id' directive"))
  return true;

if (!getStreamer().EmitCVFuncIdDirective(FunctionId))
  return Error(FunctionIdLoc, "function id already allocated");

return false;
3595}

3597/// parseDirectiveCVInlineSiteId
3598/// ::= .cv_inline_site_id FunctionId
3599///         "within" IAFunc
3600///         "inlined_at" IAFile IALine [IACol]
3601///
3602/// Introduces a function ID that can be used with .cv_loc. Includes "inlined
3603/// at" source location information for use in the line table of the caller,
3604/// whether the caller is a real function or another inlined call site.
3605bool AsmParser::parseDirectiveCVInlineSiteId() {
SMLoc FunctionIdLoc = getTok().getLoc();
int64_t FunctionId;
int64_t IAFunc;
int64_t IAFile;
int64_t IALine;
int64_t IACol = 0;

// FunctionId
if (parseCVFunctionId(FunctionId, ".cv_inline_site_id"))
  return true;

// "within"
if (check((getLexer().isNot(AsmToken::Identifier) ||
           getTok().getIdentifier() != "within"),
          "expected 'within' identifier in '.cv_inline_site_id' directive"))
  return true;
Lex();

// IAFunc
if (parseCVFunctionId(IAFunc, ".cv_inline_site_id"))
  return true;

// "inlined_at"
if (check((getLexer().isNot(AsmToken::Identifier) ||
           getTok().getIdentifier() != "inlined_at"),
          "expected 'inlined_at' identifier in '.cv_inline_site_id' "
          "directive") )
  return true;
Lex();

// IAFile IALine
if (parseCVFileId(IAFile, ".cv_inline_site_id") ||
    parseIntToken(IALine, "expected line number after 'inlined_at'"))
  return true;

// [IACol]
if (getLexer().is(AsmToken::Integer)) {
  IACol = getTok().getIntVal();
  Lex();
}

if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '.cv_inline_site_id' directive"))
  return true;

if (!getStreamer().EmitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile,
                                               IALine, IACol, FunctionIdLoc))
  return Error(FunctionIdLoc, "function id already allocated");

return false;
3656}

3658/// parseDirectiveCVLoc
3659/// ::= .cv_loc FunctionId FileNumber [LineNumber] [ColumnPos] [prologue_end]
3660///                                [is_stmt VALUE]
3661/// The first number is a file number, must have been previously assigned with
3662/// a .file directive, the second number is the line number and optionally the
3663/// third number is a column position (zero if not specified).  The remaining
3664/// optional items are .loc sub-directives.
3665bool AsmParser::parseDirectiveCVLoc() {
SMLoc DirectiveLoc = getTok().getLoc();
int64_t FunctionId, FileNumber;
if (parseCVFunctionId(FunctionId, ".cv_loc") ||
    parseCVFileId(FileNumber, ".cv_loc"))
  return true;

int64_t LineNumber = 0;
if (getLexer().is(AsmToken::Integer)) {
  LineNumber = getTok().getIntVal();
  if (LineNumber < 0)
    return TokError("line number less than zero in '.cv_loc' directive");
  Lex();
}

int64_t ColumnPos = 0;
if (getLexer().is(AsmToken::Integer)) {
  ColumnPos = getTok().getIntVal();
  if (ColumnPos < 0)
    return TokError("column position less than zero in '.cv_loc' directive");
  Lex();
}

bool PrologueEnd = false;
uint64_t IsStmt = 0;

auto parseOp = [&]() -> bool {
  StringRef Name;
  SMLoc Loc = getTok().getLoc();
  if (parseIdentifier(Name))
    return TokError("unexpected token in '.cv_loc' directive");
  if (Name == "prologue_end")
    PrologueEnd = true;
  else if (Name == "is_stmt") {
    Loc = getTok().getLoc();
    const MCExpr *Value;
    if (parseExpression(Value))
      return true;
    // The expression must be the constant 0 or 1.
    IsStmt = ~0ULL;
    if (const auto *MCE = dyn_cast<MCConstantExpr>(Value))
      IsStmt = MCE->getValue();

    if (IsStmt > 1)
      return Error(Loc, "is_stmt value not 0 or 1");
  } else {
    return Error(Loc, "unknown sub-directive in '.cv_loc' directive");
  }
  return false;
};

if (parseMany(parseOp, false /*hasComma*/))
  return true;

getStreamer().EmitCVLocDirective(FunctionId, FileNumber, LineNumber,
                                 ColumnPos, PrologueEnd, IsStmt, StringRef(),
                                 DirectiveLoc);
return false;
3723}

3725/// parseDirectiveCVLinetable
3726/// ::= .cv_linetable FunctionId, FnStart, FnEnd
3727bool AsmParser::parseDirectiveCVLinetable() {
int64_t FunctionId;
StringRef FnStartName, FnEndName;
SMLoc Loc = getTok().getLoc();
if (parseCVFunctionId(FunctionId, ".cv_linetable") ||
    parseToken(AsmToken::Comma,
               "unexpected token in '.cv_linetable' directive") ||
    parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc,
                                "expected identifier in directive") ||
    parseToken(AsmToken::Comma,
               "unexpected token in '.cv_linetable' directive") ||
    parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc,
                                "expected identifier in directive"))
  return true;

MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);

getStreamer().EmitCVLinetableDirective(FunctionId, FnStartSym, FnEndSym);
return false;
3747}

3749/// parseDirectiveCVInlineLinetable
3750/// ::= .cv_inline_linetable PrimaryFunctionId FileId LineNum FnStart FnEnd
3751bool AsmParser::parseDirectiveCVInlineLinetable() {
int64_t PrimaryFunctionId, SourceFileId, SourceLineNum;
StringRef FnStartName, FnEndName;
SMLoc Loc = getTok().getLoc();
if (parseCVFunctionId(PrimaryFunctionId, ".cv_inline_linetable") ||
    parseTokenLoc(Loc) ||
    parseIntToken(
        SourceFileId,
        "expected SourceField in '.cv_inline_linetable' directive") ||
    check(SourceFileId <= 0, Loc,
          "File id less than zero in '.cv_inline_linetable' directive") ||
    parseTokenLoc(Loc) ||
    parseIntToken(
        SourceLineNum,
        "expected SourceLineNum in '.cv_inline_linetable' directive") ||
    check(SourceLineNum < 0, Loc,
          "Line number less than zero in '.cv_inline_linetable' directive") ||
    parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc,
                                "expected identifier in directive") ||
    parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc,
                                "expected identifier in directive"))
  return true;

if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement"))
  return true;

MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
getStreamer().EmitCVInlineLinetableDirective(PrimaryFunctionId, SourceFileId,
                                             SourceLineNum, FnStartSym,
                                             FnEndSym);
return false;
3783}

3785/// parseDirectiveCVDefRange
3786/// ::= .cv_def_range RangeStart RangeEnd (GapStart GapEnd)*, bytes*
3787bool AsmParser::parseDirectiveCVDefRange() {
SMLoc Loc;
std::vector<std::pair<const MCSymbol *, const MCSymbol *>> Ranges;
while (getLexer().is(AsmToken::Identifier)) {
  Loc = getLexer().getLoc();
  StringRef GapStartName;
  if (parseIdentifier(GapStartName))
    return Error(Loc, "expected identifier in directive");
  MCSymbol *GapStartSym = getContext().getOrCreateSymbol(GapStartName);

  Loc = getLexer().getLoc();
  StringRef GapEndName;
  if (parseIdentifier(GapEndName))
    return Error(Loc, "expected identifier in directive");
  MCSymbol *GapEndSym = getContext().getOrCreateSymbol(GapEndName);

  Ranges.push_back({GapStartSym, GapEndSym});
}

std::string FixedSizePortion;
if (parseToken(AsmToken::Comma, "unexpected token in directive") ||
    parseEscapedString(FixedSizePortion))
  return true;

getStreamer().EmitCVDefRangeDirective(Ranges, FixedSizePortion);
return false;
3813}

3815/// parseDirectiveCVStringTable
3816/// ::= .cv_stringtable
3817bool AsmParser::parseDirectiveCVStringTable() {
getStreamer().EmitCVStringTableDirective();
return false;
3820}

3822/// parseDirectiveCVFileChecksums
3823/// ::= .cv_filechecksums
3824bool AsmParser::parseDirectiveCVFileChecksums() {
getStreamer().EmitCVFileChecksumsDirective();
return false;
3827}

3829/// parseDirectiveCVFileChecksumOffset
3830/// ::= .cv_filechecksumoffset fileno
3831bool AsmParser::parseDirectiveCVFileChecksumOffset() {
int64_t FileNo;
if (parseIntToken(FileNo, "expected identifier in directive"))
  return true;
if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement"))
  return true;
getStreamer().EmitCVFileChecksumOffsetDirective(FileNo);
return false;
3839}

3841/// parseDirectiveCVFPOData
3842/// ::= .cv_fpo_data procsym
3843bool AsmParser::parseDirectiveCVFPOData() {
SMLoc DirLoc = getLexer().getLoc();
StringRef ProcName;
if (parseIdentifier(ProcName))
  return TokError("expected symbol name");
if (parseEOL("unexpected tokens"))
  return addErrorSuffix(" in '.cv_fpo_data' directive");
MCSymbol *ProcSym = getContext().getOrCreateSymbol(ProcName);
getStreamer().EmitCVFPOData(ProcSym, DirLoc);
return false;
3853}

3855/// parseDirectiveCFISections
3856/// ::= .cfi_sections section [, section]
3857bool AsmParser::parseDirectiveCFISections() {
StringRef Name;
bool EH = false;
bool Debug = false;

if (parseIdentifier(Name))
  return TokError("Expected an identifier");

if (Name == ".eh_frame")
  EH = true;
else if (Name == ".debug_frame")
  Debug = true;

if (getLexer().is(AsmToken::Comma)) {
  Lex();

  if (parseIdentifier(Name))
    return TokError("Expected an identifier");

  if (Name == ".eh_frame")
    EH = true;
  else if (Name == ".debug_frame")
    Debug = true;
}

getStreamer().EmitCFISections(EH, Debug);
return false;
3884}

3886/// parseDirectiveCFIStartProc
3887/// ::= .cfi_startproc [simple]
3888bool AsmParser::parseDirectiveCFIStartProc() {
StringRef Simple;
if (!parseOptionalToken(AsmToken::EndOfStatement)) {
  if (check(parseIdentifier(Simple) || Simple != "simple",
            "unexpected token") ||
      parseToken(AsmToken::EndOfStatement))
    return addErrorSuffix(" in '.cfi_startproc' directive");
}

getStreamer().EmitCFIStartProc(!Simple.empty());
return false;
3899}

3901/// parseDirectiveCFIEndProc
3902/// ::= .cfi_endproc
3903bool AsmParser::parseDirectiveCFIEndProc() {
getStreamer().EmitCFIEndProc();
return false;
3906}

3908/// parse register name or number.
3909bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register,
                                            SMLoc DirectiveLoc) {
unsigned RegNo;

if (getLexer().isNot(AsmToken::Integer)) {
  if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc))
    return true;
  Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true);
} else
  return parseAbsoluteExpression(Register);

return false;
3921}

3923/// parseDirectiveCFIDefCfa
3924/// ::= .cfi_def_cfa register,  offset
3925bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) {
int64_t Register = 0, Offset = 0;
if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) ||
    parseToken(AsmToken::Comma, "unexpected token in directive") ||
    parseAbsoluteExpression(Offset))
  return true;

getStreamer().EmitCFIDefCfa(Register, Offset);
return false;
3934}

3936/// parseDirectiveCFIDefCfaOffset
3937/// ::= .cfi_def_cfa_offset offset
3938bool AsmParser::parseDirectiveCFIDefCfaOffset() {
int64_t Offset = 0;
if (parseAbsoluteExpression(Offset))
  return true;

getStreamer().EmitCFIDefCfaOffset(Offset);
return false;
3945}

3947/// parseDirectiveCFIRegister
3948/// ::= .cfi_register register, register
3949bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) {
int64_t Register1 = 0, Register2 = 0;
if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc) ||
    parseToken(AsmToken::Comma, "unexpected token in directive") ||
    parseRegisterOrRegisterNumber(Register2, DirectiveLoc))
  return true;

getStreamer().EmitCFIRegister(Register1, Register2);
return false;
3958}

3960/// parseDirectiveCFIWindowSave
3961/// ::= .cfi_window_save
3962bool AsmParser::parseDirectiveCFIWindowSave() {
getStreamer().EmitCFIWindowSave();
return false;
3965}

3967/// parseDirectiveCFIAdjustCfaOffset
3968/// ::= .cfi_adjust_cfa_offset adjustment
3969bool AsmParser::parseDirectiveCFIAdjustCfaOffset() {
int64_t Adjustment = 0;
if (parseAbsoluteExpression(Adjustment))
  return true;

getStreamer().EmitCFIAdjustCfaOffset(Adjustment);
return false;
3976}

3978/// parseDirectiveCFIDefCfaRegister
3979/// ::= .cfi_def_cfa_register register
3980bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) {
int64_t Register = 0;
if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
  return true;

getStreamer().EmitCFIDefCfaRegister(Register);
return false;
3987}

3989/// parseDirectiveCFIOffset
3990/// ::= .cfi_offset register, offset
3991bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) {
int64_t Register = 0;
int64_t Offset = 0;

if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) ||
    parseToken(AsmToken::Comma, "unexpected token in directive") ||
    parseAbsoluteExpression(Offset))
  return true;

getStreamer().EmitCFIOffset(Register, Offset);
return false;
4002}

4004/// parseDirectiveCFIRelOffset
4005/// ::= .cfi_rel_offset register, offset
4006bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) {
int64_t Register = 0, Offset = 0;

if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) ||
    parseToken(AsmToken::Comma, "unexpected token in directive") ||
    parseAbsoluteExpression(Offset))
  return true;

getStreamer().EmitCFIRelOffset(Register, Offset);
return false;
4016}

4018static bool isValidEncoding(int64_t Encoding) {
if (Encoding & ~0xff)
  return false;

if (Encoding == dwarf::DW_EH_PE_omit)
  return true;

const unsigned Format = Encoding & 0xf;
if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
    Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
    Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
    Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
  return false;

const unsigned Application = Encoding & 0x70;
if (Application != dwarf::DW_EH_PE_absptr &&
    Application != dwarf::DW_EH_PE_pcrel)
  return false;

return true;
4038}

4040/// parseDirectiveCFIPersonalityOrLsda
4041/// IsPersonality true for cfi_personality, false for cfi_lsda
4042/// ::= .cfi_personality encoding, [symbol_name]
4043/// ::= .cfi_lsda encoding, [symbol_name]
4044bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) {
int64_t Encoding = 0;
if (parseAbsoluteExpression(Encoding))
  return true;
if (Encoding == dwarf::DW_EH_PE_omit)
  return false;

StringRef Name;
if (check(!isValidEncoding(Encoding), "unsupported encoding.") ||
    parseToken(AsmToken::Comma, "unexpected token in directive") ||
    check(parseIdentifier(Name), "expected identifier in directive"))
  return true;

MCSymbol *Sym = getContext().getOrCreateSymbol(Name);

if (IsPersonality)
  getStreamer().EmitCFIPersonality(Sym, Encoding);
else
  getStreamer().EmitCFILsda(Sym, Encoding);
return false;
4064}

4066/// parseDirectiveCFIRememberState
4067/// ::= .cfi_remember_state
4068bool AsmParser::parseDirectiveCFIRememberState() {
getStreamer().EmitCFIRememberState();
return false;
4071}

4073/// parseDirectiveCFIRestoreState
4074/// ::= .cfi_remember_state
4075bool AsmParser::parseDirectiveCFIRestoreState() {
getStreamer().EmitCFIRestoreState();
return false;
4078}

4080/// parseDirectiveCFISameValue
4081/// ::= .cfi_same_value register
4082bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) {
int64_t Register = 0;

if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
  return true;

getStreamer().EmitCFISameValue(Register);
return false;
4090}

4092/// parseDirectiveCFIRestore
4093/// ::= .cfi_restore register
4094bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) {
int64_t Register = 0;
if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
  return true;

getStreamer().EmitCFIRestore(Register);
return false;
4101}

4103/// parseDirectiveCFIEscape
4104/// ::= .cfi_escape expression[,...]
4105bool AsmParser::parseDirectiveCFIEscape() {
std::string Values;
int64_t CurrValue;
if (parseAbsoluteExpression(CurrValue))
  return true;

Values.push_back((uint8_t)CurrValue);

while (getLexer().is(AsmToken::Comma)) {
  Lex();

  if (parseAbsoluteExpression(CurrValue))
    return true;

  Values.push_back((uint8_t)CurrValue);
}

getStreamer().EmitCFIEscape(Values);
return false;
4124}

4126/// parseDirectiveCFIReturnColumn
4127/// ::= .cfi_return_column register
4128bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) {
int64_t Register = 0;
if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
  return true;
getStreamer().EmitCFIReturnColumn(Register);
return false;
4134}

4136/// parseDirectiveCFISignalFrame
4137/// ::= .cfi_signal_frame
4138bool AsmParser::parseDirectiveCFISignalFrame() {
if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '.cfi_signal_frame'"))
  return true;

getStreamer().EmitCFISignalFrame();
return false;
4145}

4147/// parseDirectiveCFIUndefined
4148/// ::= .cfi_undefined register
4149bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) {
int64_t Register = 0;

if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
  return true;

getStreamer().EmitCFIUndefined(Register);
return false;
4157}

4159/// parseDirectiveAltmacro
4160/// ::= .altmacro
4161/// ::= .noaltmacro
4162bool AsmParser::parseDirectiveAltmacro(StringRef Directive) {
if (getLexer().isNot(AsmToken::EndOfStatement))
  return TokError("unexpected token in '" + Directive + "' directive");
if (Directive == ".altmacro")
  getLexer().SetAltMacroMode(true);
else
  getLexer().SetAltMacroMode(false);
return false;
4170}

4172/// parseDirectiveMacrosOnOff
4173/// ::= .macros_on
4174/// ::= .macros_off
4175bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) {
if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '" + Directive + "' directive"))
  return true;

setMacrosEnabled(Directive == ".macros_on");
return false;
4182}

4184/// parseDirectiveMacro
4185/// ::= .macro name[,] [parameters]
4186bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) {
StringRef Name;
if (parseIdentifier(Name))
  return TokError("expected identifier in '.macro' directive");

if (getLexer().is(AsmToken::Comma))
  Lex();

MCAsmMacroParameters Parameters;
while (getLexer().isNot(AsmToken::EndOfStatement)) {

  if (!Parameters.empty() && Parameters.back().Vararg)
    return Error(Lexer.getLoc(),
                 "Vararg parameter '" + Parameters.back().Name +
                 "' should be last one in the list of parameters.");

  MCAsmMacroParameter Parameter;
  if (parseIdentifier(Parameter.Name))
    return TokError("expected identifier in '.macro' directive");

  // Emit an error if two (or more) named parameters share the same name
  for (const MCAsmMacroParameter& CurrParam : Parameters)
    if (CurrParam.Name.equals(Parameter.Name))
      return TokError("macro '" + Name + "' has multiple parameters"
                      " named '" + Parameter.Name + "'");

  if (Lexer.is(AsmToken::Colon)) {
    Lex();  // consume ':'

    SMLoc QualLoc;
    StringRef Qualifier;

    QualLoc = Lexer.getLoc();
    if (parseIdentifier(Qualifier))
      return Error(QualLoc, "missing parameter qualifier for "
                   "'" + Parameter.Name + "' in macro '" + Name + "'");

    if (Qualifier == "req")
      Parameter.Required = true;
    else if (Qualifier == "vararg")
      Parameter.Vararg = true;
    else
      return Error(QualLoc, Qualifier + " is not a valid parameter qualifier "
                   "for '" + Parameter.Name + "' in macro '" + Name + "'");
  }

  if (getLexer().is(AsmToken::Equal)) {
    Lex();

    SMLoc ParamLoc;

    ParamLoc = Lexer.getLoc();
    if (parseMacroArgument(Parameter.Value, /*Vararg=*/false ))
      return true;

    if (Parameter.Required)
      Warning(ParamLoc, "pointless default value for required parameter "
              "'" + Parameter.Name + "' in macro '" + Name + "'");
  }

  Parameters.push_back(std::move(Parameter));

  if (getLexer().is(AsmToken::Comma))
    Lex();
}

// Eat just the end of statement.
Lexer.Lex();

// Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors
AsmToken EndToken, StartToken = getTok();
unsigned MacroDepth = 0;
// Lex the macro definition.
while (true) {
  // Ignore Lexing errors in macros.
  while (Lexer.is(AsmToken::Error)) {
    Lexer.Lex();
  }

  // Check whether we have reached the end of the file.
  if (getLexer().is(AsmToken::Eof))
    return Error(DirectiveLoc, "no matching '.endmacro' in definition");

  // Otherwise, check whether we have reach the .endmacro.
  if (getLexer().is(AsmToken::Identifier)) {
    if (getTok().getIdentifier() == ".endm" ||
        getTok().getIdentifier() == ".endmacro") {
      if (MacroDepth == 0) { // Outermost macro.
        EndToken = getTok();
        Lexer.Lex();
        if (getLexer().isNot(AsmToken::EndOfStatement))
          return TokError("unexpected token in '" + EndToken.getIdentifier() +
                          "' directive");
        break;
      } else {
        // Otherwise we just found the end of an inner macro.
        --MacroDepth;
      }
    } else if (getTok().getIdentifier() == ".macro") {
      // We allow nested macros. Those aren't instantiated until the outermost
      // macro is expanded so just ignore them for now.
      ++MacroDepth;
    }
  }

  // Otherwise, scan til the end of the statement.
  eatToEndOfStatement();
}

if (getContext().lookupMacro(Name)) {
  return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
}

const char *BodyStart = StartToken.getLoc().getPointer();
const char *BodyEnd = EndToken.getLoc().getPointer();
StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
checkForBadMacro(DirectiveLoc, Name, Body, Parameters);
MCAsmMacro Macro(Name, Body, std::move(Parameters));
DEBUG_WITH_TYPE("asm-macros", dbgs() << "Defining new macro:\n";do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro
.dump(); } } while (false)
                Macro.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Defining new macro:\n"; Macro
.dump(); } } while (false);
getContext().defineMacro(Name, std::move(Macro));
return false;
4308}

4310/// checkForBadMacro
4311///
4312/// With the support added for named parameters there may be code out there that
4313/// is transitioning from positional parameters.  In versions of gas that did
4314/// not support named parameters they would be ignored on the macro definition.
4315/// But to support both styles of parameters this is not possible so if a macro
4316/// definition has named parameters but does not use them and has what appears
4317/// to be positional parameters, strings like $1, $2, ... and $n, then issue a
4318/// warning that the positional parameter found in body which have no effect.
4319/// Hoping the developer will either remove the named parameters from the macro
4320/// definition so the positional parameters get used if that was what was
4321/// intended or change the macro to use the named parameters.  It is possible
4322/// this warning will trigger when the none of the named parameters are used
4323/// and the strings like $1 are infact to simply to be passed trough unchanged.
4324void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name,
                               StringRef Body,
                               ArrayRef<MCAsmMacroParameter> Parameters) {
// If this macro is not defined with named parameters the warning we are
// checking for here doesn't apply.
unsigned NParameters = Parameters.size();
if (NParameters == 0)
  return;

bool NamedParametersFound = false;
bool PositionalParametersFound = false;

// Look at the body of the macro for use of both the named parameters and what
// are likely to be positional parameters.  This is what expandMacro() is
// doing when it finds the parameters in the body.
while (!Body.empty()) {
  // Scan for the next possible parameter.
  std::size_t End = Body.size(), Pos = 0;
  for (; Pos != End; ++Pos) {
    // Check for a substitution or escape.
    // This macro is defined with parameters, look for \foo, \bar, etc.
    if (Body[Pos] == '\\' && Pos + 1 != End)
      break;

    // This macro should have parameters, but look for $0, $1, ..., $n too.
    if (Body[Pos] != '$' || Pos + 1 == End)
      continue;
    char Next = Body[Pos + 1];
    if (Next == '$' || Next == 'n' ||
        isdigit(static_cast<unsigned char>(Next)))
      break;
  }

  // Check if we reached the end.
  if (Pos == End)
    break;

  if (Body[Pos] == '$') {
    switch (Body[Pos + 1]) {
    // $$ => $
    case '$':
      break;

    // $n => number of arguments
    case 'n':
      PositionalParametersFound = true;
      break;

    // $[0-9] => argument
    default: {
      PositionalParametersFound = true;
      break;
    }
    }
    Pos += 2;
  } else {
    unsigned I = Pos + 1;
    while (isIdentifierChar(Body[I]) && I + 1 != End)
      ++I;

    const char *Begin = Body.data() + Pos + 1;
    StringRef Argument(Begin, I - (Pos + 1));
    unsigned Index = 0;
    for (; Index < NParameters; ++Index)
      if (Parameters[Index].Name == Argument)
        break;

    if (Index == NParameters) {
      if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
        Pos += 3;
      else {
        Pos = I;
      }
    } else {
      NamedParametersFound = true;
      Pos += 1 + Argument.size();
    }
  }
  // Update the scan point.
  Body = Body.substr(Pos);
}

if (!NamedParametersFound && PositionalParametersFound)
  Warning(DirectiveLoc, "macro defined with named parameters which are not "
                        "used in macro body, possible positional parameter "
                        "found in body which will have no effect");
4410}

4412/// parseDirectiveExitMacro
4413/// ::= .exitm
4414bool AsmParser::parseDirectiveExitMacro(StringRef Directive) {
if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '" + Directive + "' directive"))
  return true;

if (!isInsideMacroInstantiation())
  return TokError("unexpected '" + Directive + "' in file, "
                                               "no current macro definition");

// Exit all conditionals that are active in the current macro.
while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) {
  TheCondState = TheCondStack.back();
  TheCondStack.pop_back();
}

handleMacroExit();
return false;
4431}

4433/// parseDirectiveEndMacro
4434/// ::= .endm
4435/// ::= .endmacro
4436bool AsmParser::parseDirectiveEndMacro(StringRef Directive) {
if (getLexer().isNot(AsmToken::EndOfStatement))
  return TokError("unexpected token in '" + Directive + "' directive");

// If we are inside a macro instantiation, terminate the current
// instantiation.
if (isInsideMacroInstantiation()) {
  handleMacroExit();
  return false;
}

// Otherwise, this .endmacro is a stray entry in the file; well formed
// .endmacro directives are handled during the macro definition parsing.
return TokError("unexpected '" + Directive + "' in file, "
                                             "no current macro definition");
4451}

4453/// parseDirectivePurgeMacro
4454/// ::= .purgem
4455bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) {
StringRef Name;
SMLoc Loc;
if (parseTokenLoc(Loc) ||
    check(parseIdentifier(Name), Loc,
          "expected identifier in '.purgem' directive") ||
    parseToken(AsmToken::EndOfStatement,
               "unexpected token in '.purgem' directive"))
  return true;

if (!getContext().lookupMacro(Name))
  return Error(DirectiveLoc, "macro '" + Name + "' is not defined");

getContext().undefineMacro(Name);
DEBUG_WITH_TYPE("asm-macros", dbgs()do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Un-defining macro: " <<
 Name << "\n"; } } while (false)
                                  << "Un-defining macro: " << Name << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("asm-macros")) { dbgs() << "Un-defining macro: " <<
 Name << "\n"; } } while (false);
return false;
4472}

4474/// parseDirectiveBundleAlignMode
4475/// ::= {.bundle_align_mode} expression
4476bool AsmParser::parseDirectiveBundleAlignMode() {
// Expect a single argument: an expression that evaluates to a constant
// in the inclusive range 0-30.
SMLoc ExprLoc = getLexer().getLoc();
int64_t AlignSizePow2;
if (checkForValidSection() || parseAbsoluteExpression(AlignSizePow2) ||
    parseToken(AsmToken::EndOfStatement, "unexpected token after expression "
                                         "in '.bundle_align_mode' "
                                         "directive") ||
    check(AlignSizePow2 < 0 || AlignSizePow2 > 30, ExprLoc,
          "invalid bundle alignment size (expected between 0 and 30)"))
  return true;

// Because of AlignSizePow2's verified range we can safely truncate it to
// unsigned.
getStreamer().EmitBundleAlignMode(static_cast<unsigned>(AlignSizePow2));
return false;
4493}

4495/// parseDirectiveBundleLock
4496/// ::= {.bundle_lock} [align_to_end]
4497bool AsmParser::parseDirectiveBundleLock() {
if (checkForValidSection())
  return true;
bool AlignToEnd = false;

StringRef Option;
SMLoc Loc = getTok().getLoc();
const char *kInvalidOptionError =
    "invalid option for '.bundle_lock' directive";

if (!parseOptionalToken(AsmToken::EndOfStatement)) {
  if (check(parseIdentifier(Option), Loc, kInvalidOptionError) ||
      check(Option != "align_to_end", Loc, kInvalidOptionError) ||
      parseToken(AsmToken::EndOfStatement,
                 "unexpected token after '.bundle_lock' directive option"))
    return true;
  AlignToEnd = true;
}

getStreamer().EmitBundleLock(AlignToEnd);
return false;
4518}

4520/// parseDirectiveBundleLock
4521/// ::= {.bundle_lock}
4522bool AsmParser::parseDirectiveBundleUnlock() {
if (checkForValidSection() ||
    parseToken(AsmToken::EndOfStatement,
               "unexpected token in '.bundle_unlock' directive"))
  return true;

getStreamer().EmitBundleUnlock();
return false;
4530}

4532/// parseDirectiveSpace
4533/// ::= (.skip | .space) expression [ , expression ]
4534bool AsmParser::parseDirectiveSpace(StringRef IDVal) {
SMLoc NumBytesLoc = Lexer.getLoc();
const MCExpr *NumBytes;
if (checkForValidSection() || parseExpression(NumBytes))
  return true;

int64_t FillExpr = 0;
if (parseOptionalToken(AsmToken::Comma))
  if (parseAbsoluteExpression(FillExpr))
    return addErrorSuffix("in '" + Twine(IDVal) + "' directive");
if (parseToken(AsmToken::EndOfStatement))
  return addErrorSuffix("in '" + Twine(IDVal) + "' directive");

// FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
getStreamer().emitFill(*NumBytes, FillExpr, NumBytesLoc);

return false;
4551}

4553/// parseDirectiveDCB
4554/// ::= .dcb.{b, l, w} expression, expression
4555bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) {
SMLoc NumValuesLoc = Lexer.getLoc();
int64_t NumValues;
if (checkForValidSection() || parseAbsoluteExpression(NumValues))
  return true;

if (NumValues < 0) {
  Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
  return false;
}

if (parseToken(AsmToken::Comma,
               "unexpected token in '" + Twine(IDVal) + "' directive"))
  return true;

const MCExpr *Value;
SMLoc ExprLoc = getLexer().getLoc();
if (parseExpression(Value))
  return true;

// Special case constant expressions to match code generator.
if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
  assert(Size <= 8 && "Invalid size")(static_cast <bool> (Size <= 8 && "Invalid size"
) ? void (0) : __assert_fail ("Size <= 8 && \"Invalid size\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 4577, __extension__ __PRETTY_FUNCTION__));
  uint64_t IntValue = MCE->getValue();
  if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
    return Error(ExprLoc, "literal value out of range for directive");
  for (uint64_t i = 0, e = NumValues; i != e; ++i)
    getStreamer().EmitIntValue(IntValue, Size);
} else {
  for (uint64_t i = 0, e = NumValues; i != e; ++i)
    getStreamer().EmitValue(Value, Size, ExprLoc);
}

if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '" + Twine(IDVal) + "' directive"))
  return true;

return false;
4593}

4595/// parseDirectiveRealDCB
4596/// ::= .dcb.{d, s} expression, expression
4597bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) {
SMLoc NumValuesLoc = Lexer.getLoc();
int64_t NumValues;
if (checkForValidSection() || parseAbsoluteExpression(NumValues))
  return true;

if (NumValues < 0) {
  Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
  return false;
}

if (parseToken(AsmToken::Comma,
               "unexpected token in '" + Twine(IDVal) + "' directive"))
  return true;

APInt AsInt;
if (parseRealValue(Semantics, AsInt))
  return true;

if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '" + Twine(IDVal) + "' directive"))
  return true;

for (uint64_t i = 0, e = NumValues; i != e; ++i)
  getStreamer().EmitIntValue(AsInt.getLimitedValue(),
                             AsInt.getBitWidth() / 8);

return false;
4625}

4627/// parseDirectiveDS
4628/// ::= .ds.{b, d, l, p, s, w, x} expression
4629bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) {
SMLoc NumValuesLoc = Lexer.getLoc();
int64_t NumValues;
if (checkForValidSection() || parseAbsoluteExpression(NumValues))
  return true;

if (NumValues < 0) {
  Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
  return false;
}

if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '" + Twine(IDVal) + "' directive"))
  return true;

for (uint64_t i = 0, e = NumValues; i != e; ++i)
  getStreamer().emitFill(Size, 0);

return false;
4648}

4650/// parseDirectiveLEB128
4651/// ::= (.sleb128 | .uleb128) [ expression (, expression)* ]
4652bool AsmParser::parseDirectiveLEB128(bool Signed) {
if (checkForValidSection())
  return true;

auto parseOp = [&]() -> bool {
  const MCExpr *Value;
  if (parseExpression(Value))
    return true;
  if (Signed)
    getStreamer().EmitSLEB128Value(Value);
  else
    getStreamer().EmitULEB128Value(Value);
  return false;
};

if (parseMany(parseOp))
  return addErrorSuffix(" in directive");

return false;
4671}

4673/// parseDirectiveSymbolAttribute
4674///  ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
4675bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
auto parseOp = [&]() -> bool {
  StringRef Name;
  SMLoc Loc = getTok().getLoc();
  if (parseIdentifier(Name))
    return Error(Loc, "expected identifier");
  MCSymbol *Sym = getContext().getOrCreateSymbol(Name);

  // Assembler local symbols don't make any sense here. Complain loudly.
  if (Sym->isTemporary())
    return Error(Loc, "non-local symbol required");

  if (!getStreamer().EmitSymbolAttribute(Sym, Attr))
    return Error(Loc, "unable to emit symbol attribute");
  return false;
};

if (parseMany(parseOp))
  return addErrorSuffix(" in directive");
return false;
4695}

4697/// parseDirectiveComm
4698///  ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
4699bool AsmParser::parseDirectiveComm(bool IsLocal) {
if (checkForValidSection())
  return true;

SMLoc IDLoc = getLexer().getLoc();
StringRef Name;
if (parseIdentifier(Name))
  return TokError("expected identifier in directive");

// Handle the identifier as the key symbol.
MCSymbol *Sym = getContext().getOrCreateSymbol(Name);

if (getLexer().isNot(AsmToken::Comma))
  return TokError("unexpected token in directive");
Lex();

int64_t Size;
SMLoc SizeLoc = getLexer().getLoc();
if (parseAbsoluteExpression(Size))
  return true;

int64_t Pow2Alignment = 0;
SMLoc Pow2AlignmentLoc;
if (getLexer().is(AsmToken::Comma)) {
  Lex();
  Pow2AlignmentLoc = getLexer().getLoc();
  if (parseAbsoluteExpression(Pow2Alignment))
    return true;

  LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType();
  if (IsLocal && LCOMM == LCOMM::NoAlignment)
    return Error(Pow2AlignmentLoc, "alignment not supported on this target");

  // If this target takes alignments in bytes (not log) validate and convert.
  if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) ||
      (IsLocal && LCOMM == LCOMM::ByteAlignment)) {
    if (!isPowerOf2_64(Pow2Alignment))
      return Error(Pow2AlignmentLoc, "alignment must be a power of 2");
    Pow2Alignment = Log2_64(Pow2Alignment);
  }
}

if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '.comm' or '.lcomm' directive"))
  return true;

// NOTE: a size of zero for a .comm should create a undefined symbol
// but a size of .lcomm creates a bss symbol of size zero.
if (Size < 0)
  return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't "
                        "be less than zero");

// NOTE: The alignment in the directive is a power of 2 value, the assembler
// may internally end up wanting an alignment in bytes.
// FIXME: Diagnose overflow.
if (Pow2Alignment < 0)
  return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive "
                                 "alignment, can't be less than zero");

Sym->redefineIfPossible();
if (!Sym->isUndefined())
  return Error(IDLoc, "invalid symbol redefinition");

// Create the Symbol as a common or local common with Size and Pow2Alignment
if (IsLocal) {
  getStreamer().EmitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment);
  return false;
}

getStreamer().EmitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
return false;
4770}

4772/// parseDirectiveAbort
4773///  ::= .abort [... message ...]
4774bool AsmParser::parseDirectiveAbort() {
// FIXME: Use loc from directive.
SMLoc Loc = getLexer().getLoc();

StringRef Str = parseStringToEndOfStatement();
if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '.abort' directive"))
  return true;

if (Str.empty())
  return Error(Loc, ".abort detected. Assembly stopping.");
else
  return Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
// FIXME: Actually abort assembly here.

return false;
4790}

4792/// parseDirectiveInclude
4793///  ::= .include "filename"
4794bool AsmParser::parseDirectiveInclude() {
// Allow the strings to have escaped octal character sequence.
std::string Filename;
SMLoc IncludeLoc = getTok().getLoc();

if (check(getTok().isNot(AsmToken::String),
          "expected string in '.include' directive") ||
    parseEscapedString(Filename) ||
    check(getTok().isNot(AsmToken::EndOfStatement),
          "unexpected token in '.include' directive") ||
    // Attempt to switch the lexer to the included file before consuming the
    // end of statement to avoid losing it when we switch.
    check(enterIncludeFile(Filename), IncludeLoc,
          "Could not find include file '" + Filename + "'"))
  return true;

return false;
4811}

4813/// parseDirectiveIncbin
4814///  ::= .incbin "filename" [ , skip [ , count ] ]
4815bool AsmParser::parseDirectiveIncbin() {
// Allow the strings to have escaped octal character sequence.
std::string Filename;
SMLoc IncbinLoc = getTok().getLoc();
if (check(getTok().isNot(AsmToken::String),
          "expected string in '.incbin' directive") ||
    parseEscapedString(Filename))
  return true;

int64_t Skip = 0;
const MCExpr *Count = nullptr;
SMLoc SkipLoc, CountLoc;
if (parseOptionalToken(AsmToken::Comma)) {
  // The skip expression can be omitted while specifying the count, e.g:
  //  .incbin "filename",,4
  if (getTok().isNot(AsmToken::Comma)) {
    if (parseTokenLoc(SkipLoc) || parseAbsoluteExpression(Skip))
      return true;
  }
  if (parseOptionalToken(AsmToken::Comma)) {
    CountLoc = getTok().getLoc();
    if (parseExpression(Count))
      return true;
  }
}

if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '.incbin' directive"))
  return true;

if (check(Skip < 0, SkipLoc, "skip is negative"))
  return true;

// Attempt to process the included file.
if (processIncbinFile(Filename, Skip, Count, CountLoc))
  return Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
return false;
4852}

4854/// parseDirectiveIf
4855/// ::= .if{,eq,ge,gt,le,lt,ne} expression
4856bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) {
TheCondStack.push_back(TheCondState);
TheCondState.TheCond = AsmCond::IfCond;
if (TheCondState.Ignore) {
  eatToEndOfStatement();
} else {
  int64_t ExprValue;
  if (parseAbsoluteExpression(ExprValue) ||
      parseToken(AsmToken::EndOfStatement,
                 "unexpected token in '.if' directive"))
    return true;

  switch (DirKind) {
  default:
    llvm_unreachable("unsupported directive")::llvm::llvm_unreachable_internal("unsupported directive", "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 4870);
  case DK_IF:
  case DK_IFNE:
    break;
  case DK_IFEQ:
    ExprValue = ExprValue == 0;
    break;
  case DK_IFGE:
    ExprValue = ExprValue >= 0;
    break;
  case DK_IFGT:
    ExprValue = ExprValue > 0;
    break;
  case DK_IFLE:
    ExprValue = ExprValue <= 0;
    break;
  case DK_IFLT:
    ExprValue = ExprValue < 0;
    break;
  }

  TheCondState.CondMet = ExprValue;
  TheCondState.Ignore = !TheCondState.CondMet;
}

return false;
4896}

4898/// parseDirectiveIfb
4899/// ::= .ifb string
4900bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
TheCondStack.push_back(TheCondState);
TheCondState.TheCond = AsmCond::IfCond;

if (TheCondState.Ignore) {
  eatToEndOfStatement();
} else {
  StringRef Str = parseStringToEndOfStatement();

  if (parseToken(AsmToken::EndOfStatement,
                 "unexpected token in '.ifb' directive"))
    return true;

  TheCondState.CondMet = ExpectBlank == Str.empty();
  TheCondState.Ignore = !TheCondState.CondMet;
}

return false;
4918}

4920/// parseDirectiveIfc
4921/// ::= .ifc string1, string2
4922/// ::= .ifnc string1, string2
4923bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
TheCondStack.push_back(TheCondState);
TheCondState.TheCond = AsmCond::IfCond;

if (TheCondState.Ignore) {
  eatToEndOfStatement();
} else {
  StringRef Str1 = parseStringToComma();

  if (parseToken(AsmToken::Comma, "unexpected token in '.ifc' directive"))
    return true;

  StringRef Str2 = parseStringToEndOfStatement();

  if (parseToken(AsmToken::EndOfStatement,
                 "unexpected token in '.ifc' directive"))
    return true;

  TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim());
  TheCondState.Ignore = !TheCondState.CondMet;
}

return false;
4946}

4948/// parseDirectiveIfeqs
4949///   ::= .ifeqs string1, string2
4950bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) {
if (Lexer.isNot(AsmToken::String)) {
  if (ExpectEqual)
    return TokError("expected string parameter for '.ifeqs' directive");
  return TokError("expected string parameter for '.ifnes' directive");
}

StringRef String1 = getTok().getStringContents();
Lex();

if (Lexer.isNot(AsmToken::Comma)) {
  if (ExpectEqual)
    return TokError(
        "expected comma after first string for '.ifeqs' directive");
  return TokError("expected comma after first string for '.ifnes' directive");
}

Lex();

if (Lexer.isNot(AsmToken::String)) {
  if (ExpectEqual)
    return TokError("expected string parameter for '.ifeqs' directive");
  return TokError("expected string parameter for '.ifnes' directive");
}

StringRef String2 = getTok().getStringContents();
Lex();

TheCondStack.push_back(TheCondState);
TheCondState.TheCond = AsmCond::IfCond;
TheCondState.CondMet = ExpectEqual == (String1 == String2);
TheCondState.Ignore = !TheCondState.CondMet;

return false;
4984}

4986/// parseDirectiveIfdef
4987/// ::= .ifdef symbol
4988bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
StringRef Name;
TheCondStack.push_back(TheCondState);
TheCondState.TheCond = AsmCond::IfCond;

if (TheCondState.Ignore) {
  eatToEndOfStatement();
} else {
  if (check(parseIdentifier(Name), "expected identifier after '.ifdef'") ||
      parseToken(AsmToken::EndOfStatement, "unexpected token in '.ifdef'"))
    return true;

  MCSymbol *Sym = getContext().lookupSymbol(Name);

  if (expect_defined)
    TheCondState.CondMet = (Sym && !Sym->isUndefined());
  else
    TheCondState.CondMet = (!Sym || Sym->isUndefined());
  TheCondState.Ignore = !TheCondState.CondMet;
}

return false;
5010}

5012/// parseDirectiveElseIf
5013/// ::= .elseif expression
5014bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) {
if (TheCondState.TheCond != AsmCond::IfCond &&
    TheCondState.TheCond != AsmCond::ElseIfCond)
  return Error(DirectiveLoc, "Encountered a .elseif that doesn't follow an"
                             " .if or  an .elseif");
TheCondState.TheCond = AsmCond::ElseIfCond;

bool LastIgnoreState = false;
if (!TheCondStack.empty())
  LastIgnoreState = TheCondStack.back().Ignore;
if (LastIgnoreState || TheCondState.CondMet) {
  TheCondState.Ignore = true;
  eatToEndOfStatement();
} else {
  int64_t ExprValue;
  if (parseAbsoluteExpression(ExprValue))
    return true;

  if (parseToken(AsmToken::EndOfStatement,
                 "unexpected token in '.elseif' directive"))
    return true;

  TheCondState.CondMet = ExprValue;
  TheCondState.Ignore = !TheCondState.CondMet;
}

return false;
5041}

5043/// parseDirectiveElse
5044/// ::= .else
5045bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) {
if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '.else' directive"))
  return true;

if (TheCondState.TheCond != AsmCond::IfCond &&
    TheCondState.TheCond != AsmCond::ElseIfCond)
  return Error(DirectiveLoc, "Encountered a .else that doesn't follow "
                             " an .if or an .elseif");
TheCondState.TheCond = AsmCond::ElseCond;
bool LastIgnoreState = false;
if (!TheCondStack.empty())
  LastIgnoreState = TheCondStack.back().Ignore;
if (LastIgnoreState || TheCondState.CondMet)
  TheCondState.Ignore = true;
else
  TheCondState.Ignore = false;

return false;
5064}

5066/// parseDirectiveEnd
5067/// ::= .end
5068bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) {
if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '.end' directive"))
  return true;

while (Lexer.isNot(AsmToken::Eof))
  Lexer.Lex();

return false;
5077}

5079/// parseDirectiveError
5080///   ::= .err
5081///   ::= .error [string]
5082bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) {
if (!TheCondStack.empty()) {
  if (TheCondStack.back().Ignore) {
    eatToEndOfStatement();
    return false;
  }
}

if (!WithMessage)
  return Error(L, ".err encountered");

StringRef Message = ".error directive invoked in source file";
if (Lexer.isNot(AsmToken::EndOfStatement)) {
  if (Lexer.isNot(AsmToken::String))
    return TokError(".error argument must be a string");

  Message = getTok().getStringContents();
  Lex();
}

return Error(L, Message);
5103}

5105/// parseDirectiveWarning
5106///   ::= .warning [string]
5107bool AsmParser::parseDirectiveWarning(SMLoc L) {
if (!TheCondStack.empty()) {
  if (TheCondStack.back().Ignore) {
    eatToEndOfStatement();
    return false;
  }
}

StringRef Message = ".warning directive invoked in source file";

if (!parseOptionalToken(AsmToken::EndOfStatement)) {
  if (Lexer.isNot(AsmToken::String))
    return TokError(".warning argument must be a string");

  Message = getTok().getStringContents();
  Lex();
  if (parseToken(AsmToken::EndOfStatement,
                 "expected end of statement in '.warning' directive"))
    return true;
}

return Warning(L, Message);
5129}

5131/// parseDirectiveEndIf
5132/// ::= .endif
5133bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) {
if (parseToken(AsmToken::EndOfStatement,
               "unexpected token in '.endif' directive"))
  return true;

if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty())
  return Error(DirectiveLoc, "Encountered a .endif that doesn't follow "
                             "an .if or .else");
if (!TheCondStack.empty()) {
  TheCondState = TheCondStack.back();
  TheCondStack.pop_back();
}

return false;
5147}

5149void AsmParser::initializeDirectiveKindMap() {
DirectiveKindMap[".set"] = DK_SET;
DirectiveKindMap[".equ"] = DK_EQU;
DirectiveKindMap[".equiv"] = DK_EQUIV;
DirectiveKindMap[".ascii"] = DK_ASCII;
DirectiveKindMap[".asciz"] = DK_ASCIZ;
DirectiveKindMap[".string"] = DK_STRING;
DirectiveKindMap[".byte"] = DK_BYTE;
DirectiveKindMap[".short"] = DK_SHORT;
DirectiveKindMap[".value"] = DK_VALUE;
DirectiveKindMap[".2byte"] = DK_2BYTE;
DirectiveKindMap[".long"] = DK_LONG;
DirectiveKindMap[".int"] = DK_INT;
DirectiveKindMap[".4byte"] = DK_4BYTE;
DirectiveKindMap[".quad"] = DK_QUAD;
DirectiveKindMap[".8byte"] = DK_8BYTE;
DirectiveKindMap[".octa"] = DK_OCTA;
DirectiveKindMap[".single"] = DK_SINGLE;
DirectiveKindMap[".float"] = DK_FLOAT;
DirectiveKindMap[".double"] = DK_DOUBLE;
DirectiveKindMap[".align"] = DK_ALIGN;
DirectiveKindMap[".align32"] = DK_ALIGN32;
DirectiveKindMap[".balign"] = DK_BALIGN;
DirectiveKindMap[".balignw"] = DK_BALIGNW;
DirectiveKindMap[".balignl"] = DK_BALIGNL;
DirectiveKindMap[".p2align"] = DK_P2ALIGN;
DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW;
DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL;
DirectiveKindMap[".org"] = DK_ORG;
DirectiveKindMap[".fill"] = DK_FILL;
DirectiveKindMap[".zero"] = DK_ZERO;
DirectiveKindMap[".extern"] = DK_EXTERN;
DirectiveKindMap[".globl"] = DK_GLOBL;
DirectiveKindMap[".global"] = DK_GLOBAL;
DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE;
DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP;
DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER;
DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN;
DirectiveKindMap[".reference"] = DK_REFERENCE;
DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION;
DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE;
DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN;
DirectiveKindMap[".comm"] = DK_COMM;
DirectiveKindMap[".common"] = DK_COMMON;
DirectiveKindMap[".lcomm"] = DK_LCOMM;
DirectiveKindMap[".abort"] = DK_ABORT;
DirectiveKindMap[".include"] = DK_INCLUDE;
DirectiveKindMap[".incbin"] = DK_INCBIN;
DirectiveKindMap[".code16"] = DK_CODE16;
DirectiveKindMap[".code16gcc"] = DK_CODE16GCC;
DirectiveKindMap[".rept"] = DK_REPT;
DirectiveKindMap[".rep"] = DK_REPT;
DirectiveKindMap[".irp"] = DK_IRP;
DirectiveKindMap[".irpc"] = DK_IRPC;
DirectiveKindMap[".endr"] = DK_ENDR;
DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE;
DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK;
DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK;
DirectiveKindMap[".if"] = DK_IF;
DirectiveKindMap[".ifeq"] = DK_IFEQ;
DirectiveKindMap[".ifge"] = DK_IFGE;
DirectiveKindMap[".ifgt"] = DK_IFGT;
DirectiveKindMap[".ifle"] = DK_IFLE;
DirectiveKindMap[".iflt"] = DK_IFLT;
DirectiveKindMap[".ifne"] = DK_IFNE;
DirectiveKindMap[".ifb"] = DK_IFB;
DirectiveKindMap[".ifnb"] = DK_IFNB;
DirectiveKindMap[".ifc"] = DK_IFC;
DirectiveKindMap[".ifeqs"] = DK_IFEQS;
DirectiveKindMap[".ifnc"] = DK_IFNC;
DirectiveKindMap[".ifnes"] = DK_IFNES;
DirectiveKindMap[".ifdef"] = DK_IFDEF;
DirectiveKindMap[".ifndef"] = DK_IFNDEF;
DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF;
DirectiveKindMap[".elseif"] = DK_ELSEIF;
DirectiveKindMap[".else"] = DK_ELSE;
DirectiveKindMap[".end"] = DK_END;
DirectiveKindMap[".endif"] = DK_ENDIF;
DirectiveKindMap[".skip"] = DK_SKIP;
DirectiveKindMap[".space"] = DK_SPACE;
DirectiveKindMap[".file"] = DK_FILE;
DirectiveKindMap[".line"] = DK_LINE;
DirectiveKindMap[".loc"] = DK_LOC;
DirectiveKindMap[".stabs"] = DK_STABS;
DirectiveKindMap[".cv_file"] = DK_CV_FILE;
DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID;
DirectiveKindMap[".cv_loc"] = DK_CV_LOC;
DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE;
DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE;
DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID;
DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE;
DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE;
DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS;
DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET;
DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA;
DirectiveKindMap[".sleb128"] = DK_SLEB128;
DirectiveKindMap[".uleb128"] = DK_ULEB128;
DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS;
DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC;
DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC;
DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA;
DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET;
DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET;
DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER;
DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET;
DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET;
DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY;
DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA;
DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE;
DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE;
DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE;
DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE;
DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE;
DirectiveKindMap[".cfi_return_column"] = DK_CFI_RETURN_COLUMN;
DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME;
DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED;
DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER;
DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE;
DirectiveKindMap[".macros_on"] = DK_MACROS_ON;
DirectiveKindMap[".macros_off"] = DK_MACROS_OFF;
DirectiveKindMap[".macro"] = DK_MACRO;
DirectiveKindMap[".exitm"] = DK_EXITM;
DirectiveKindMap[".endm"] = DK_ENDM;
DirectiveKindMap[".endmacro"] = DK_ENDMACRO;
DirectiveKindMap[".purgem"] = DK_PURGEM;
DirectiveKindMap[".err"] = DK_ERR;
DirectiveKindMap[".error"] = DK_ERROR;
DirectiveKindMap[".warning"] = DK_WARNING;
DirectiveKindMap[".altmacro"] = DK_ALTMACRO;
DirectiveKindMap[".noaltmacro"] = DK_NOALTMACRO;
DirectiveKindMap[".reloc"] = DK_RELOC;
DirectiveKindMap[".dc"] = DK_DC;
DirectiveKindMap[".dc.a"] = DK_DC_A;
DirectiveKindMap[".dc.b"] = DK_DC_B;
DirectiveKindMap[".dc.d"] = DK_DC_D;
DirectiveKindMap[".dc.l"] = DK_DC_L;
DirectiveKindMap[".dc.s"] = DK_DC_S;
DirectiveKindMap[".dc.w"] = DK_DC_W;
DirectiveKindMap[".dc.x"] = DK_DC_X;
DirectiveKindMap[".dcb"] = DK_DCB;
DirectiveKindMap[".dcb.b"] = DK_DCB_B;
DirectiveKindMap[".dcb.d"] = DK_DCB_D;
DirectiveKindMap[".dcb.l"] = DK_DCB_L;
DirectiveKindMap[".dcb.s"] = DK_DCB_S;
DirectiveKindMap[".dcb.w"] = DK_DCB_W;
DirectiveKindMap[".dcb.x"] = DK_DCB_X;
DirectiveKindMap[".ds"] = DK_DS;
DirectiveKindMap[".ds.b"] = DK_DS_B;
DirectiveKindMap[".ds.d"] = DK_DS_D;
DirectiveKindMap[".ds.l"] = DK_DS_L;
DirectiveKindMap[".ds.p"] = DK_DS_P;
DirectiveKindMap[".ds.s"] = DK_DS_S;
DirectiveKindMap[".ds.w"] = DK_DS_W;
DirectiveKindMap[".ds.x"] = DK_DS_X;
DirectiveKindMap[".print"] = DK_PRINT;
DirectiveKindMap[".addrsig"] = DK_ADDRSIG;
DirectiveKindMap[".addrsig_sym"] = DK_ADDRSIG_SYM;
5306}

5308MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) {
AsmToken EndToken, StartToken = getTok();

unsigned NestLevel = 0;
while (true) {
  // Check whether we have reached the end of the file.
  if (getLexer().is(AsmToken::Eof)) {
    printError(DirectiveLoc, "no matching '.endr' in definition");
    return nullptr;
  }

  if (Lexer.is(AsmToken::Identifier) &&
      (getTok().getIdentifier() == ".rep" ||
       getTok().getIdentifier() == ".rept" ||
       getTok().getIdentifier() == ".irp" ||
       getTok().getIdentifier() == ".irpc")) {
    ++NestLevel;
  }

  // Otherwise, check whether we have reached the .endr.
  if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") {
    if (NestLevel == 0) {
      EndToken = getTok();
      Lex();
      if (Lexer.isNot(AsmToken::EndOfStatement)) {
        printError(getTok().getLoc(),
                   "unexpected token in '.endr' directive");
        return nullptr;
      }
      break;
    }
    --NestLevel;
  }

  // Otherwise, scan till the end of the statement.
  eatToEndOfStatement();
}

const char *BodyStart = StartToken.getLoc().getPointer();
const char *BodyEnd = EndToken.getLoc().getPointer();
StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);

// We Are Anonymous.
MacroLikeBodies.emplace_back(StringRef(), Body, MCAsmMacroParameters());
return &MacroLikeBodies.back();
5353}

5355void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
                                       raw_svector_ostream &OS) {
OS << ".endr\n";

std::unique_ptr<MemoryBuffer> Instantiation =
    MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");

// Create the macro instantiation object and add to the current macro
// instantiation stack.
MacroInstantiation *MI = new MacroInstantiation(
    DirectiveLoc, CurBuffer, getTok().getLoc(), TheCondStack.size());
ActiveMacros.push_back(MI);

// Jump to the macro instantiation and prime the lexer.
CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
Lex();
5372}

5374/// parseDirectiveRept
5375///   ::= .rep | .rept count
5376bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) {
const MCExpr *CountExpr;
SMLoc CountLoc = getTok().getLoc();
if (parseExpression(CountExpr))
  return true;

int64_t Count;
if (!CountExpr->evaluateAsAbsolute(Count, getStreamer().getAssemblerPtr())) {
  return Error(CountLoc, "unexpected token in '" + Dir + "' directive");
}

if (check(Count < 0, CountLoc, "Count is negative") ||
    parseToken(AsmToken::EndOfStatement,
               "unexpected token in '" + Dir + "' directive"))
  return true;

// Lex the rept definition.
MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
if (!M)
  return true;

// Macro instantiation is lexical, unfortunately. We construct a new buffer
// to hold the macro body with substitutions.
SmallString<256> Buf;
raw_svector_ostream OS(Buf);
while (Count--) {
  // Note that the AtPseudoVariable is disabled for instantiations of .rep(t).
  if (expandMacro(OS, M->Body, None, None, false, getTok().getLoc()))
    return true;
}
instantiateMacroLikeBody(M, DirectiveLoc, OS);

return false;
5409}

5411/// parseDirectiveIrp
5412/// ::= .irp symbol,values
5413bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) {
MCAsmMacroParameter Parameter;
MCAsmMacroArguments A;
if (check(parseIdentifier(Parameter.Name),
          "expected identifier in '.irp' directive") ||
    parseToken(AsmToken::Comma, "expected comma in '.irp' directive") ||
    parseMacroArguments(nullptr, A) ||
    parseToken(AsmToken::EndOfStatement, "expected End of Statement"))
  return true;

// Lex the irp definition.
MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
if (!M)
  return true;

// Macro instantiation is lexical, unfortunately. We construct a new buffer
// to hold the macro body with substitutions.
SmallString<256> Buf;
raw_svector_ostream OS(Buf);

for (const MCAsmMacroArgument &Arg : A) {
  // Note that the AtPseudoVariable is enabled for instantiations of .irp.
  // This is undocumented, but GAS seems to support it.
  if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
    return true;
}

instantiateMacroLikeBody(M, DirectiveLoc, OS);

return false;
5443}

5445/// parseDirectiveIrpc
5446/// ::= .irpc symbol,values
5447bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) {
MCAsmMacroParameter Parameter;
MCAsmMacroArguments A;

if (check(parseIdentifier(Parameter.Name),
          "expected identifier in '.irpc' directive") ||
    parseToken(AsmToken::Comma, "expected comma in '.irpc' directive") ||
    parseMacroArguments(nullptr, A))
  return true;

if (A.size() != 1 || A.front().size() != 1)
  return TokError("unexpected token in '.irpc' directive");

// Eat the end of statement.
if (parseToken(AsmToken::EndOfStatement, "expected end of statement"))
  return true;

// Lex the irpc definition.
MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
if (!M)
  return true;

// Macro instantiation is lexical, unfortunately. We construct a new buffer
// to hold the macro body with substitutions.
SmallString<256> Buf;
raw_svector_ostream OS(Buf);

StringRef Values = A.front().front().getString();
for (std::size_t I = 0, End = Values.size(); I != End; ++I) {
  MCAsmMacroArgument Arg;
  Arg.emplace_back(AsmToken::Identifier, Values.slice(I, I + 1));

  // Note that the AtPseudoVariable is enabled for instantiations of .irpc.
  // This is undocumented, but GAS seems to support it.
  if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
    return true;
}

instantiateMacroLikeBody(M, DirectiveLoc, OS);

return false;
5488}

5490bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) {
if (ActiveMacros.empty())
  return TokError("unmatched '.endr' directive");

// The only .repl that should get here are the ones created by
// instantiateMacroLikeBody.
assert(getLexer().is(AsmToken::EndOfStatement))(static_cast <bool> (getLexer().is(AsmToken::EndOfStatement
)) ? void (0) : __assert_fail ("getLexer().is(AsmToken::EndOfStatement)"
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 5496, __extension__ __PRETTY_FUNCTION__));

handleMacroExit();
return false;
5500}

5502bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info,
                                   size_t Len) {
const MCExpr *Value;
SMLoc ExprLoc = getLexer().getLoc();
if (parseExpression(Value))
  return true;
const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
if (!MCE)
  return Error(ExprLoc, "unexpected expression in _emit");
uint64_t IntValue = MCE->getValue();
if (!isUInt<8>(IntValue) && !isInt<8>(IntValue))
  return Error(ExprLoc, "literal value out of range for directive");

Info.AsmRewrites->emplace_back(AOK_Emit, IDLoc, Len);
return false;
5517}

5519bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) {
const MCExpr *Value;
SMLoc ExprLoc = getLexer().getLoc();
if (parseExpression(Value))
  return true;
const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
if (!MCE)
  return Error(ExprLoc, "unexpected expression in align");
uint64_t IntValue = MCE->getValue();
if (!isPowerOf2_64(IntValue))
  return Error(ExprLoc, "literal value not a power of two greater then zero");

Info.AsmRewrites->emplace_back(AOK_Align, IDLoc, 5, Log2_64(IntValue));
return false;
5533}

5535bool AsmParser::parseDirectivePrint(SMLoc DirectiveLoc) {
const AsmToken StrTok = getTok();
Lex();
if (StrTok.isNot(AsmToken::String) || StrTok.getString().front() != '"')
  return Error(DirectiveLoc, "expected double quoted string after .print");
if (parseToken(AsmToken::EndOfStatement, "expected end of statement"))
  return true;
llvm::outs() << StrTok.getStringContents() << '\n';
return false;
5544}

5546bool AsmParser::parseDirectiveAddrsig() {
getStreamer().EmitAddrsig();
return false;
5549}

5551bool AsmParser::parseDirectiveAddrsigSym() {
StringRef Name;
if (check(parseIdentifier(Name),
          "expected identifier in '.addrsig_sym' directive"))
  return true;
MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
getStreamer().EmitAddrsigSym(Sym);
return false;
5559}

5561// We are comparing pointers, but the pointers are relative to a single string.
5562// Thus, this should always be deterministic.
5563static int rewritesSort(const AsmRewrite *AsmRewriteA,
                      const AsmRewrite *AsmRewriteB) {
if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer())
  return -1;
if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer())
  return 1;

// It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output
// rewrite to the same location.  Make sure the SizeDirective rewrite is
// performed first, then the Imm/ImmPrefix and finally the Input/Output.  This
// ensures the sort algorithm is stable.
if (AsmRewritePrecedence[AsmRewriteA->Kind] >
    AsmRewritePrecedence[AsmRewriteB->Kind])
  return -1;

if (AsmRewritePrecedence[AsmRewriteA->Kind] <
    AsmRewritePrecedence[AsmRewriteB->Kind])
  return 1;
llvm_unreachable("Unstable rewrite sort.")::llvm::llvm_unreachable_internal("Unstable rewrite sort.", "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 5581);
5582}

5584bool AsmParser::parseMSInlineAsm(
  void *AsmLoc, std::string &AsmString, unsigned &NumOutputs,
  unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool>> &OpDecls,
  SmallVectorImpl<std::string> &Constraints,
  SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII,
  const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) {
SmallVector<void *, 4> InputDecls;
SmallVector<void *, 4> OutputDecls;
SmallVector<bool, 4> InputDeclsAddressOf;
SmallVector<bool, 4> OutputDeclsAddressOf;
SmallVector<std::string, 4> InputConstraints;
SmallVector<std::string, 4> OutputConstraints;
SmallVector<unsigned, 4> ClobberRegs;

SmallVector<AsmRewrite, 4> AsmStrRewrites;

// Prime the lexer.
Lex();

// While we have input, parse each statement.
unsigned InputIdx = 0;
unsigned OutputIdx = 0;
while (getLexer().isNot(AsmToken::Eof)) {
  // Parse curly braces marking block start/end
  if (parseCurlyBlockScope(AsmStrRewrites))
    continue;

  ParseStatementInfo Info(&AsmStrRewrites);
  bool StatementErr = parseStatement(Info, &SI);

  if (StatementErr || Info.ParseError) {
    // Emit pending errors if any exist.
    printPendingErrors();
    return true;
  }

  // No pending error should exist here.
  assert(!hasPendingError() && "unexpected error from parseStatement")(static_cast <bool> (!hasPendingError() && "unexpected error from parseStatement"
) ? void (0) : __assert_fail ("!hasPendingError() && \"unexpected error from parseStatement\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 5621, __extension__ __PRETTY_FUNCTION__));

  if (Info.Opcode == ~0U)
    continue;

  const MCInstrDesc &Desc = MII->get(Info.Opcode);

  // Build the list of clobbers, outputs and inputs.
  for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) {
    MCParsedAsmOperand &Operand = *Info.ParsedOperands[i];

    // Immediate.
    if (Operand.isImm())
      continue;

    // Register operand.
    if (Operand.isReg() && !Operand.needAddressOf() &&
        !getTargetParser().OmitRegisterFromClobberLists(Operand.getReg())) {
      unsigned NumDefs = Desc.getNumDefs();
      // Clobber.
      if (NumDefs && Operand.getMCOperandNum() < NumDefs)
        ClobberRegs.push_back(Operand.getReg());
      continue;
    }

    // Expr/Input or Output.
    StringRef SymName = Operand.getSymName();
    if (SymName.empty())
      continue;

    void *OpDecl = Operand.getOpDecl();
    if (!OpDecl)
      continue;

    bool isOutput = (i == 1) && Desc.mayStore();
    SMLoc Start = SMLoc::getFromPointer(SymName.data());
    if (isOutput) {
      ++InputIdx;
      OutputDecls.push_back(OpDecl);
      OutputDeclsAddressOf.push_back(Operand.needAddressOf());
      OutputConstraints.push_back(("=" + Operand.getConstraint()).str());
      AsmStrRewrites.emplace_back(AOK_Output, Start, SymName.size());
    } else {
      InputDecls.push_back(OpDecl);
      InputDeclsAddressOf.push_back(Operand.needAddressOf());
      InputConstraints.push_back(Operand.getConstraint().str());
      AsmStrRewrites.emplace_back(AOK_Input, Start, SymName.size());
    }
  }

  // Consider implicit defs to be clobbers.  Think of cpuid and push.
  ArrayRef<MCPhysReg> ImpDefs(Desc.getImplicitDefs(),
                              Desc.getNumImplicitDefs());
  ClobberRegs.insert(ClobberRegs.end(), ImpDefs.begin(), ImpDefs.end());
}

// Set the number of Outputs and Inputs.
NumOutputs = OutputDecls.size();
NumInputs = InputDecls.size();

// Set the unique clobbers.
array_pod_sort(ClobberRegs.begin(), ClobberRegs.end());
ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()),
                  ClobberRegs.end());
Clobbers.assign(ClobberRegs.size(), std::string());
for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) {
  raw_string_ostream OS(Clobbers[I]);
  IP->printRegName(OS, ClobberRegs[I]);
}

// Merge the various outputs and inputs.  Output are expected first.
if (NumOutputs || NumInputs) {
  unsigned NumExprs = NumOutputs + NumInputs;
  OpDecls.resize(NumExprs);
  Constraints.resize(NumExprs);
  for (unsigned i = 0; i < NumOutputs; ++i) {
    OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]);
    Constraints[i] = OutputConstraints[i];
  }
  for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) {
    OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]);
    Constraints[j] = InputConstraints[i];
  }
}

// Build the IR assembly string.
std::string AsmStringIR;
raw_string_ostream OS(AsmStringIR);
StringRef ASMString =
    SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer();
const char *AsmStart = ASMString.begin();
const char *AsmEnd = ASMString.end();
array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort);
for (const AsmRewrite &AR : AsmStrRewrites) {
  AsmRewriteKind Kind = AR.Kind;

  const char *Loc = AR.Loc.getPointer();
  assert(Loc >= AsmStart && "Expected Loc to be at or after Start!")(static_cast <bool> (Loc >= AsmStart && "Expected Loc to be at or after Start!"
) ? void (0) : __assert_fail ("Loc >= AsmStart && \"Expected Loc to be at or after Start!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 5718, __extension__ __PRETTY_FUNCTION__));

  // Emit everything up to the immediate/expression.
  if (unsigned Len = Loc - AsmStart)
    OS << StringRef(AsmStart, Len);

  // Skip the original expression.
  if (Kind == AOK_Skip) {
    AsmStart = Loc + AR.Len;
    continue;
  }

  unsigned AdditionalSkip = 0;
  // Rewrite expressions in $N notation.
  switch (Kind) {
  default:
    break;
  case AOK_IntelExpr:
    assert(AR.IntelExp.isValid() && "cannot write invalid intel expression")(static_cast <bool> (AR.IntelExp.isValid() && "cannot write invalid intel expression"
) ? void (0) : __assert_fail ("AR.IntelExp.isValid() && \"cannot write invalid intel expression\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 5736, __extension__ __PRETTY_FUNCTION__));
    if (AR.IntelExp.NeedBracs)
      OS << "[";
    if (AR.IntelExp.hasBaseReg())
      OS << AR.IntelExp.BaseReg;
    if (AR.IntelExp.hasIndexReg())
      OS << (AR.IntelExp.hasBaseReg() ? " + " : "")
         << AR.IntelExp.IndexReg;
    if (AR.IntelExp.Scale > 1)
        OS << " * $$" << AR.IntelExp.Scale;
    if (AR.IntelExp.Imm || !AR.IntelExp.hasRegs())
      OS << (AR.IntelExp.hasRegs() ? " + $$" : "$$") << AR.IntelExp.Imm;
    if (AR.IntelExp.NeedBracs)
      OS << "]";
    break;
  case AOK_Label:
    OS << Ctx.getAsmInfo()->getPrivateLabelPrefix() << AR.Label;
    break;
  case AOK_Input:
    OS << '$' << InputIdx++;
    break;
  case AOK_Output:
    OS << '$' << OutputIdx++;
    break;
  case AOK_SizeDirective:
    switch (AR.Val) {
    default: break;
    case 8:  OS << "byte ptr "; break;
    case 16: OS << "word ptr "; break;
    case 32: OS << "dword ptr "; break;
    case 64: OS << "qword ptr "; break;
    case 80: OS << "xword ptr "; break;
    case 128: OS << "xmmword ptr "; break;
    case 256: OS << "ymmword ptr "; break;
    }
    break;
  case AOK_Emit:
    OS << ".byte";
    break;
  case AOK_Align: {
    // MS alignment directives are measured in bytes. If the native assembler
    // measures alignment in bytes, we can pass it straight through.
    OS << ".align";
    if (getContext().getAsmInfo()->getAlignmentIsInBytes())
      break;

    // Alignment is in log2 form, so print that instead and skip the original
    // immediate.
    unsigned Val = AR.Val;
    OS << ' ' << Val;
    assert(Val < 10 && "Expected alignment less then 2^10.")(static_cast <bool> (Val < 10 && "Expected alignment less then 2^10."
) ? void (0) : __assert_fail ("Val < 10 && \"Expected alignment less then 2^10.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 5786, __extension__ __PRETTY_FUNCTION__));
    AdditionalSkip = (Val < 4) ? 2 : Val < 7 ? 3 : 4;
    break;
  }
  case AOK_EVEN:
    OS << ".even";
    break;
  case AOK_EndOfStatement:
    OS << "\n\t";
    break;
  }

  // Skip the original expression.
  AsmStart = Loc + AR.Len + AdditionalSkip;
}

// Emit the remainder of the asm string.
if (AsmStart != AsmEnd)
  OS << StringRef(AsmStart, AsmEnd - AsmStart);

AsmString = OS.str();
return false;
5808}

5810namespace llvm {
5811namespace MCParserUtils {

5813/// Returns whether the given symbol is used anywhere in the given expression,
5814/// or subexpressions.
5815static bool isSymbolUsedInExpression(const MCSymbol *Sym, const MCExpr *Value) {
switch (Value->getKind()) {
case MCExpr::Binary: {
  const MCBinaryExpr *BE = static_cast<const MCBinaryExpr *>(Value);
  return isSymbolUsedInExpression(Sym, BE->getLHS()) ||
         isSymbolUsedInExpression(Sym, BE->getRHS());
}
case MCExpr::Target:
case MCExpr::Constant:
  return false;
case MCExpr::SymbolRef: {
  const MCSymbol &S =
      static_cast<const MCSymbolRefExpr *>(Value)->getSymbol();
  if (S.isVariable())
    return isSymbolUsedInExpression(Sym, S.getVariableValue());
  return &S == Sym;
}
case MCExpr::Unary:
  return isSymbolUsedInExpression(
      Sym, static_cast<const MCUnaryExpr *>(Value)->getSubExpr());
}

llvm_unreachable("Unknown expr kind!")::llvm::llvm_unreachable_internal("Unknown expr kind!", "/build/llvm-toolchain-snapshot-7~svn338205/lib/MC/MCParser/AsmParser.cpp"
, 5837);
5838}

5840bool parseAssignmentExpression(StringRef Name, bool allow_redef,
                             MCAsmParser &Parser, MCSymbol *&Sym,
                             const MCExpr *&Value, bool AllowExtendedExpr) {

// FIXME: Use better location, we should use proper tokens.
SMLoc EqualLoc = Parser.getTok().getLoc();
SMLoc EndLoc;
if (AllowExtendedExpr) {
22
←
Taking true branch→
  if (Parser.getTargetParser().parseAssignmentExpression(Value, EndLoc)) {
23
←
Assuming the condition is true→
24
←
Taking true branch→
    return Parser.TokError("missing expression");
25
←
Returning without writing to 'Sym'→
  }
} else if (Parser.parseExpression(Value, EndLoc))
    return Parser.TokError("missing expression");

// Note: we don't count b as used in "a = b". This is to allow
// a = b
// b = c

if (Parser.parseToken(AsmToken::EndOfStatement))
  return true;

// Validate that the LHS is allowed to be a variable (either it has not been
// used as a symbol, or it is an absolute symbol).
Sym = Parser.getContext().lookupSymbol(Name);
if (Sym) {
  // Diagnose assignment to a label.
  //
  // FIXME: Diagnostics. Note the location of the definition as a label.
  // FIXME: Diagnose assignment to protected identifier (e.g., register name).
  if (isSymbolUsedInExpression(Sym, Value))
    return Parser.Error(EqualLoc, "Recursive use of '" + Name + "'");
  else if (Sym->isUndefined(/*SetUsed*/ false) && !Sym->isUsed() &&
           !Sym->isVariable())
    ; // Allow redefinitions of undefined symbols only used in directives.
  else if (Sym->isVariable() && !Sym->isUsed() && allow_redef)
    ; // Allow redefinitions of variables that haven't yet been used.
  else if (!Sym->isUndefined() && (!Sym->isVariable() || !allow_redef))
    return Parser.Error(EqualLoc, "redefinition of '" + Name + "'");
  else if (!Sym->isVariable())
    return Parser.Error(EqualLoc, "invalid assignment to '" + Name + "'");
  else if (!isa<MCConstantExpr>(Sym->getVariableValue()))
    return Parser.Error(EqualLoc,
                        "invalid reassignment of non-absolute variable '" +
                            Name + "'");
} else if (Name == ".") {
  Parser.getStreamer().emitValueToOffset(Value, 0, EqualLoc);
  return false;
} else
  Sym = Parser.getContext().getOrCreateSymbol(Name);

Sym->setRedefinable(allow_redef);

return false;
5893}

5895} // end namespace MCParserUtils
5896} // end namespace llvm

5898/// Create an MCAsmParser instance.
5899MCAsmParser *llvm::createMCAsmParser(SourceMgr &SM, MCContext &C,
                                   MCStreamer &Out, const MCAsmInfo &MAI,
                                   unsigned CB) {
return new AsmParser(SM, C, Out, MAI, CB);
5903}