1894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===- AsmParser.cpp - Parser for Assembly Files --------------------------===// 2894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 3894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// The LLVM Compiler Infrastructure 4894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 5894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// This file is distributed under the University of Illinois Open Source 6894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// License. See LICENSE.TXT for details. 7894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 8894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 9894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 10894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// This class implements the parser for assembly files. 11894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 12894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 13894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman#include "llvm/ADT/APFloat.h" 15894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/ADT/SmallString.h" 16894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/ADT/StringMap.h" 17894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/ADT/StringSwitch.h" 18894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/ADT/Twine.h" 19894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/MC/MCAsmInfo.h" 20894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/MC/MCContext.h" 2119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman#include "llvm/MC/MCDwarf.h" 22894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/MC/MCExpr.h" 23894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/MC/MCParser/AsmCond.h" 24894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/MC/MCParser/AsmLexer.h" 25894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/MC/MCParser/MCAsmParser.h" 26894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/MC/MCParser/MCParsedAsmOperand.h" 2719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman#include "llvm/MC/MCRegisterInfo.h" 28894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/MC/MCSectionMachO.h" 29894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/MC/MCStreamer.h" 30894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/MC/MCSymbol.h" 3119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman#include "llvm/MC/MCTargetAsmParser.h" 3219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman#include "llvm/Support/CommandLine.h" 3319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman#include "llvm/Support/MathExtras.h" 34894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/Support/MemoryBuffer.h" 35894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/Support/SourceMgr.h" 36894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/Support/raw_ostream.h" 3719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman#include <cctype> 38894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include <vector> 39894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanusing namespace llvm; 40894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 4119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanstatic cl::opt<bool> 4219bac1e08be200c31efd26f0f5fd144c9b3eefd3John BaumanFatalAssemblerWarnings("fatal-assembler-warnings", 4319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman cl::desc("Consider warnings as error")); 4419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 45894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumannamespace { 46894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 47894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// \brief Helper class for tracking macro definitions. 48894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanstruct Macro { 49894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringRef Name; 50894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringRef Body; 5119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman std::vector<StringRef> Parameters; 52894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 53894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanpublic: 5419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Macro(StringRef N, StringRef B, const std::vector<StringRef> &P) : 5519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Name(N), Body(B), Parameters(P) {} 56894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman}; 57894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 58894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// \brief Helper class for storing information about an active macro 59894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// instantiation. 60894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanstruct MacroInstantiation { 61894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// The macro being instantiated. 62894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const Macro *TheMacro; 63894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 64894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// The macro instantiation with substitutions. 65894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MemoryBuffer *Instantiation; 66894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 67894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// The location of the instantiation. 68894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc InstantiationLoc; 69894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 70894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// The location where parsing should resume upon instantiation completion. 71894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc ExitLoc; 72894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 73894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanpublic: 74894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MacroInstantiation(const Macro *M, SMLoc IL, SMLoc EL, 7519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MemoryBuffer *I); 76894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman}; 77894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 78894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// \brief The concrete assembly parser instance. 79894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanclass AsmParser : public MCAsmParser { 80894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman friend class GenericAsmParser; 81894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 82894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AsmParser(const AsmParser &); // DO NOT IMPLEMENT 83894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman void operator=(const AsmParser &); // DO NOT IMPLEMENT 84894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanprivate: 85894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AsmLexer Lexer; 86894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCContext &Ctx; 87894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCStreamer &Out; 8819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const MCAsmInfo &MAI; 89894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SourceMgr &SrcMgr; 9019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SourceMgr::DiagHandlerTy SavedDiagHandler; 9119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman void *SavedDiagContext; 92894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCAsmParserExtension *GenericParser; 93894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCAsmParserExtension *PlatformParser; 94894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 95894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// This is the current buffer index we're lexing from as managed by the 96894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// SourceMgr object. 97894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int CurBuffer; 98894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 99894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AsmCond TheCondState; 100894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman std::vector<AsmCond> TheCondStack; 101894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 102894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// DirectiveMap - This is a table handlers for directives. Each handler is 103894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// invoked after the directive identifier is read and is responsible for 104894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// parsing and validating the rest of the directive. The handler is passed 105894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// in the directive name and the location of the directive keyword. 106894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringMap<std::pair<MCAsmParserExtension*, DirectiveHandler> > DirectiveMap; 107894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 108894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// MacroMap - Map of currently defined macros. 109894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringMap<Macro*> MacroMap; 110894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 111894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// ActiveMacros - Stack of active macro instantiations. 112894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman std::vector<MacroInstantiation*> ActiveMacros; 113894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 114894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// Boolean tracking whether macro substitution is enabled. 115894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned MacrosEnabled : 1; 116894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 11719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman /// Flag tracking whether any errors have been encountered. 11819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned HadError : 1; 11919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 12019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman /// The values from the last parsed cpp hash file line comment if any. 12119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman StringRef CppHashFilename; 12219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t CppHashLineNumber; 12319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc CppHashLoc; 12419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 125894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanpublic: 12619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out, 127894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const MCAsmInfo &MAI); 128894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ~AsmParser(); 129894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 130894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman virtual bool Run(bool NoInitialTextSection, bool NoFinalize = false); 131894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 132894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman void AddDirectiveHandler(MCAsmParserExtension *Object, 133894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringRef Directive, 134894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DirectiveHandler Handler) { 135894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DirectiveMap[Directive] = std::make_pair(Object, Handler); 136894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 137894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 138894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanpublic: 139894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// @name MCAsmParser Interface 140894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// { 141894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 142894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman virtual SourceMgr &getSourceManager() { return SrcMgr; } 143894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman virtual MCAsmLexer &getLexer() { return Lexer; } 144894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman virtual MCContext &getContext() { return Ctx; } 145894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman virtual MCStreamer &getStreamer() { return Out; } 146894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 14719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman virtual bool Warning(SMLoc L, const Twine &Msg); 148894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman virtual bool Error(SMLoc L, const Twine &Msg); 149894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 150894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const AsmToken &Lex(); 151894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 152894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseExpression(const MCExpr *&Res); 153894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman virtual bool ParseExpression(const MCExpr *&Res, SMLoc &EndLoc); 154894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman virtual bool ParseParenExpression(const MCExpr *&Res, SMLoc &EndLoc); 155894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman virtual bool ParseAbsoluteExpression(int64_t &Res); 156894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 157894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// } 158894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 159894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanprivate: 16019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman void CheckForValidSection(); 16119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 162894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseStatement(); 16319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman void EatToEndOfLine(); 16419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseCppHashLineFilenameComment(const SMLoc &L); 165894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 166894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool HandleMacroEntry(StringRef Name, SMLoc NameLoc, const Macro *M); 16719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool expandMacro(SmallString<256> &Buf, StringRef Body, 16819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const std::vector<StringRef> &Parameters, 16919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const std::vector<std::vector<AsmToken> > &A, 17019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const SMLoc &L); 171894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman void HandleMacroExit(); 172894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 173894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman void PrintMacroInstantiations(); 17419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman void PrintMessage(SMLoc Loc, const Twine &Msg, const char *Type, 17519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ShowLine = true) const { 17619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SrcMgr.PrintMessage(Loc, Msg, Type, ShowLine); 17719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 17819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman static void DiagHandler(const SMDiagnostic &Diag, void *Context); 17919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 180894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// EnterIncludeFile - Enter the specified file. This returns true on failure. 181894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool EnterIncludeFile(const std::string &Filename); 182894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 183894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// \brief Reset the current lexer position to that given by \arg Loc. The 184894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// current token is not set; clients should ensure Lex() is called 185894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// subsequently. 186894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman void JumpToLoc(SMLoc Loc); 187894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 188894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman void EatToEndOfStatement(); 189894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 190894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// \brief Parse up to the end of statement and a return the contents from the 191894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// current token until the end of the statement; the current token on exit 192894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// will be either the EndOfStatement or EOF. 193894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringRef ParseStringToEndOfStatement(); 194894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 19519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseAssignment(StringRef Name, bool allow_redef); 196894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 197894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc); 198894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc); 199894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseParenExpr(const MCExpr *&Res, SMLoc &EndLoc); 20019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc); 201894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 202894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// ParseIdentifier - Parse an identifier or string (as a quoted identifier) 203894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// and set \arg Res to the identifier contents. 204894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseIdentifier(StringRef &Res); 20519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 206894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Directive Parsing. 20719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 20819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // ".ascii", ".asciiz", ".string" 20919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveAscii(StringRef IDVal, bool ZeroTerminated); 210894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveValue(unsigned Size); // ".byte", ".long", ... 21119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveRealValue(const fltSemantics &); // ".single", ... 212894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveFill(); // ".fill" 213894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveSpace(); // ".space" 21419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveZero(); // ".zero" 21519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveSet(StringRef IDVal, bool allow_redef); // ".set", ".equ", ".equiv" 216894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveOrg(); // ".org" 217894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // ".align{,32}", ".p2align{,w,l}" 218894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveAlign(bool IsPow2, unsigned ValueSize); 219894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 220894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// ParseDirectiveSymbolAttribute - Parse a directive like ".globl" which 221894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// accepts a single symbol (which should be a label or an external). 222894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveSymbolAttribute(MCSymbolAttr Attr); 223894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 224894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm" 225894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 226894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveAbort(); // ".abort" 227894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveInclude(); // ".include" 228894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 229894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveIf(SMLoc DirectiveLoc); // ".if" 23019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // ".ifdef" or ".ifndef", depending on expect_defined 23119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined); 232894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif" 233894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveElse(SMLoc DirectiveLoc); // ".else" 234894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveEndIf(SMLoc DirectiveLoc); // .endif 235894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 236894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// ParseEscapedString - Parse the current token as a string which may include 237894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman /// escaped characters and return the string contents. 238894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseEscapedString(std::string &Data); 23919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 24019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const MCExpr *ApplyModifierToExpr(const MCExpr *E, 24119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MCSymbolRefExpr::VariantKind Variant); 242894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman}; 243894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 244894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// \brief Generic implementations of directive handling, etc. which is shared 245894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// (or the default, at least) for all assembler parser. 246894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanclass GenericAsmParser : public MCAsmParserExtension { 247894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman template<bool (GenericAsmParser::*Handler)(StringRef, SMLoc)> 248894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman void AddDirectiveHandler(StringRef Directive) { 249894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getParser().AddDirectiveHandler(this, Directive, 250894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman HandleDirective<GenericAsmParser, Handler>); 251894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 252894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanpublic: 253894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman GenericAsmParser() {} 254894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 255894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AsmParser &getParser() { 256894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return (AsmParser&) this->MCAsmParserExtension::getParser(); 257894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 258894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 259894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman virtual void Initialize(MCAsmParser &Parser) { 260894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Call the base implementation. 261894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman this->MCAsmParserExtension::Initialize(Parser); 262894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 263894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Debugging directives. 264894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveFile>(".file"); 265894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLine>(".line"); 266894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLoc>(".loc"); 26719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveStabs>(".stabs"); 26819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 26919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // CFI directives. 27019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFISections>( 27119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ".cfi_sections"); 27219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIStartProc>( 27319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ".cfi_startproc"); 27419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIEndProc>( 27519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ".cfi_endproc"); 27619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIDefCfa>( 27719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ".cfi_def_cfa"); 27819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIDefCfaOffset>( 27919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ".cfi_def_cfa_offset"); 28019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIAdjustCfaOffset>( 28119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ".cfi_adjust_cfa_offset"); 28219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIDefCfaRegister>( 28319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ".cfi_def_cfa_register"); 28419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIOffset>( 28519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ".cfi_offset"); 28619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveCFIRelOffset>( 28719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ".cfi_rel_offset"); 28819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler< 28919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman &GenericAsmParser::ParseDirectiveCFIPersonalityOrLsda>(".cfi_personality"); 29019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler< 29119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman &GenericAsmParser::ParseDirectiveCFIPersonalityOrLsda>(".cfi_lsda"); 29219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler< 29319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman &GenericAsmParser::ParseDirectiveCFIRememberState>(".cfi_remember_state"); 29419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler< 29519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman &GenericAsmParser::ParseDirectiveCFIRestoreState>(".cfi_restore_state"); 29619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler< 29719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman &GenericAsmParser::ParseDirectiveCFISameValue>(".cfi_same_value"); 298894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 299894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Macro directives. 300894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacrosOnOff>( 301894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ".macros_on"); 302894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacrosOnOff>( 303894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ".macros_off"); 304894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacro>(".macro"); 305894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveEndMacro>(".endm"); 306894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveEndMacro>(".endmacro"); 30719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 30819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLEB128>(".sleb128"); 30919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLEB128>(".uleb128"); 310894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 311894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 31219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc); 31319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 314894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveFile(StringRef, SMLoc DirectiveLoc); 315894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveLine(StringRef, SMLoc DirectiveLoc); 316894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc); 31719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveStabs(StringRef, SMLoc DirectiveLoc); 31819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveCFISections(StringRef, SMLoc DirectiveLoc); 31919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveCFIStartProc(StringRef, SMLoc DirectiveLoc); 32019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveCFIEndProc(StringRef, SMLoc DirectiveLoc); 32119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveCFIDefCfa(StringRef, SMLoc DirectiveLoc); 32219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveCFIDefCfaOffset(StringRef, SMLoc DirectiveLoc); 32319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveCFIAdjustCfaOffset(StringRef, SMLoc DirectiveLoc); 32419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveCFIDefCfaRegister(StringRef, SMLoc DirectiveLoc); 32519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveCFIOffset(StringRef, SMLoc DirectiveLoc); 32619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveCFIRelOffset(StringRef, SMLoc DirectiveLoc); 32719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveCFIPersonalityOrLsda(StringRef, SMLoc DirectiveLoc); 32819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveCFIRememberState(StringRef, SMLoc DirectiveLoc); 32919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveCFIRestoreState(StringRef, SMLoc DirectiveLoc); 33019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveCFISameValue(StringRef, SMLoc DirectiveLoc); 331894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 332894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveMacrosOnOff(StringRef, SMLoc DirectiveLoc); 333894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveMacro(StringRef, SMLoc DirectiveLoc); 334894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool ParseDirectiveEndMacro(StringRef, SMLoc DirectiveLoc); 33519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 33619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool ParseDirectiveLEB128(StringRef, SMLoc); 337894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman}; 338894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 339894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 340894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 341894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumannamespace llvm { 342894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 343894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanextern MCAsmParserExtension *createDarwinAsmParser(); 344894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanextern MCAsmParserExtension *createELFAsmParser(); 34519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanextern MCAsmParserExtension *createCOFFAsmParser(); 346894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 347894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 348894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 349894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanenum { DEFAULT_ADDRSPACE = 0 }; 350894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 35119bac1e08be200c31efd26f0f5fd144c9b3eefd3John BaumanAsmParser::AsmParser(SourceMgr &_SM, MCContext &_Ctx, 352894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCStreamer &_Out, const MCAsmInfo &_MAI) 35319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman : Lexer(_MAI), Ctx(_Ctx), Out(_Out), MAI(_MAI), SrcMgr(_SM), 354894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman GenericParser(new GenericAsmParser), PlatformParser(0), 35519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CurBuffer(0), MacrosEnabled(true), CppHashLineNumber(0) { 35619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Save the old handler. 35719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SavedDiagHandler = SrcMgr.getDiagHandler(); 35819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SavedDiagContext = SrcMgr.getDiagContext(); 35919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Set our own handler which calls the saved handler. 36019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SrcMgr.setDiagHandler(DiagHandler, this); 361894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)); 362894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 363894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Initialize the generic parser. 364894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman GenericParser->Initialize(*this); 365894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 366894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Initialize the platform / file format parser. 367894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // 368894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: This is a hack, we need to (majorly) cleanup how these objects are 369894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // created. 37019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (_MAI.hasMicrosoftFastStdCallMangling()) { 37119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman PlatformParser = createCOFFAsmParser(); 37219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman PlatformParser->Initialize(*this); 37319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else if (_MAI.hasSubsectionsViaSymbols()) { 374894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman PlatformParser = createDarwinAsmParser(); 375894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman PlatformParser->Initialize(*this); 376894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else { 377894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman PlatformParser = createELFAsmParser(); 378894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman PlatformParser->Initialize(*this); 379894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 380894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 381894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 382894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanAsmParser::~AsmParser() { 383894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(ActiveMacros.empty() && "Unexpected active macro instantiation!"); 384894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 385894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Destroy any macros. 386894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (StringMap<Macro*>::iterator it = MacroMap.begin(), 387894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ie = MacroMap.end(); it != ie; ++it) 388894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman delete it->getValue(); 389894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 390894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman delete PlatformParser; 391894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman delete GenericParser; 392894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 393894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 394894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanvoid AsmParser::PrintMacroInstantiations() { 395894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Print the active macro instantiation stack. 396894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (std::vector<MacroInstantiation*>::const_reverse_iterator 397894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman it = ActiveMacros.rbegin(), ie = ActiveMacros.rend(); it != ie; ++it) 398894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman PrintMessage((*it)->InstantiationLoc, "while in macro instantiation", 399894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "note"); 400894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 401894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 40219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool AsmParser::Warning(SMLoc L, const Twine &Msg) { 40319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (FatalAssemblerWarnings) 40419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return Error(L, Msg); 40519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman PrintMessage(L, Msg, "warning"); 406894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman PrintMacroInstantiations(); 40719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 408894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 409894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 410894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::Error(SMLoc L, const Twine &Msg) { 41119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman HadError = true; 41219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman PrintMessage(L, Msg, "error"); 413894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman PrintMacroInstantiations(); 414894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 415894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 416894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 417894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::EnterIncludeFile(const std::string &Filename) { 41819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman std::string IncludedFile; 41919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int NewBuf = SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile); 420894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (NewBuf == -1) 421894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 42219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 423894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CurBuffer = NewBuf; 42419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 425894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)); 42619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 427894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 428894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 429894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 430894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanvoid AsmParser::JumpToLoc(SMLoc Loc) { 431894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CurBuffer = SrcMgr.FindBufferContainingLoc(Loc); 432894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer), Loc.getPointer()); 433894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 434894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 435894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanconst AsmToken &AsmParser::Lex() { 436894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const AsmToken *tok = &Lexer.Lex(); 43719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 438894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (tok->is(AsmToken::Eof)) { 439894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If this is the end of an included file, pop the parent file off the 440894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // include stack. 441894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer); 442894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParentIncludeLoc != SMLoc()) { 443894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman JumpToLoc(ParentIncludeLoc); 444894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman tok = &Lexer.Lex(); 445894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 446894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 44719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 448894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (tok->is(AsmToken::Error)) 449894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Error(Lexer.getErrLoc(), Lexer.getErr()); 45019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 451894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return *tok; 452894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 453894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 454894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) { 455894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Create the initial section, if requested. 456894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!NoInitialTextSection) 45719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Out.InitSections(); 458894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 459894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Prime the lexer. 460894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 46119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 46219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman HadError = false; 463894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AsmCond StartingCondState = TheCondState; 464894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 465894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // While we have input, parse each statement. 466894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman while (Lexer.isNot(AsmToken::Eof)) { 467894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!ParseStatement()) continue; 46819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 46919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // We had an error, validate that one was emitted and recover by skipping to 47019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // the next line. 47119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert(HadError && "Parse statement returned an error, but none emitted!"); 472894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EatToEndOfStatement(); 473894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 474894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 475894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TheCondState.TheCond != StartingCondState.TheCond || 476894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondState.Ignore != StartingCondState.Ignore) 477894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unmatched .ifs or .elses"); 478894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 479894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Check to see there are no empty DwarfFile slots. 480894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const std::vector<MCDwarfFile *> &MCDwarfFiles = 481894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getContext().getMCDwarfFiles(); 482894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned i = 1; i < MCDwarfFiles.size(); i++) { 48319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!MCDwarfFiles[i]) 484894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TokError("unassigned file number: " + Twine(i) + " for .file directives"); 48519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 48619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 48719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Check to see that all assembler local symbols were actually defined. 48819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Targets that don't do subsections via symbols may not want this, though, 48919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // so conservatively exclude them. Only do this if we're finalizing, though, 49019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // as otherwise we won't necessarilly have seen everything yet. 49119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!NoFinalize && MAI.hasSubsectionsViaSymbols()) { 49219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const MCContext::SymbolTable &Symbols = getContext().getSymbols(); 49319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman for (MCContext::SymbolTable::const_iterator i = Symbols.begin(), 49419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman e = Symbols.end(); 49519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman i != e; ++i) { 49619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MCSymbol *Sym = i->getValue(); 49719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Variable symbols may not be marked as defined, so check those 49819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // explicitly. If we know it's a variable, we have a definition for 49919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // the purposes of this check. 50019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined()) 50119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // FIXME: We would really like to refer back to where the symbol was 50219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // first referenced for a source location. We need to add something 50319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // to track that. Currently, we just point to the end of the file. 50419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman PrintMessage(getLexer().getLoc(), "assembler local symbol '" + 50519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Sym->getName() + "' not defined", "error", false); 506894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 507894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 50819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 50919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 510894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Finalize the output stream if there are no errors and if the client wants 511894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // us to. 51219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!HadError && !NoFinalize) 513894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Out.Finish(); 514894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 515894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return HadError; 516894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 517894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 51819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanvoid AsmParser::CheckForValidSection() { 51919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!getStreamer().getCurrentSection()) { 52019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman TokError("expected section directive before assembly directive"); 52119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Out.SwitchSection(Ctx.getMachOSection( 52219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman "__TEXT", "__text", 52319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS, 52419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 0, SectionKind::getText())); 52519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 52619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 52719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 528894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// EatToEndOfStatement - Throw away the rest of the line for testing purposes. 529894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanvoid AsmParser::EatToEndOfStatement() { 530894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman while (Lexer.isNot(AsmToken::EndOfStatement) && 531894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lexer.isNot(AsmToken::Eof)) 532894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 53319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 534894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Eat EOL. 535894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Lexer.is(AsmToken::EndOfStatement)) 536894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 537894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 538894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 539894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanStringRef AsmParser::ParseStringToEndOfStatement() { 540894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const char *Start = getTok().getLoc().getPointer(); 541894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 542894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman while (Lexer.isNot(AsmToken::EndOfStatement) && 543894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lexer.isNot(AsmToken::Eof)) 544894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 545894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 546894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const char *End = getTok().getLoc().getPointer(); 547894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return StringRef(Start, End - Start); 548894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 549894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 550894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseParenExpr - Parse a paren expression and return it. 551894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// NOTE: This assumes the leading '(' has already been consumed. 552894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 553894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// parenexpr ::= expr) 554894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 555894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) { 556894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseExpression(Res)) return true; 557894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Lexer.isNot(AsmToken::RParen)) 558894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("expected ')' in parentheses expression"); 559894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EndLoc = Lexer.getLoc(); 560894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 561894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 562894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 563894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 56419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseBracketExpr - Parse a bracket expression and return it. 56519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// NOTE: This assumes the leading '[' has already been consumed. 56619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// 56719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// bracketexpr ::= expr] 56819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// 56919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool AsmParser::ParseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) { 57019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (ParseExpression(Res)) return true; 57119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Lexer.isNot(AsmToken::RBrac)) 57219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("expected ']' in brackets expression"); 57319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EndLoc = Lexer.getLoc(); 57419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 57519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 57619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 57719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 578894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParsePrimaryExpr - Parse a primary expression and return it. 579894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// primaryexpr ::= (parenexpr 580894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// primaryexpr ::= symbol 581894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// primaryexpr ::= number 582894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// primaryexpr ::= '.' 583894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// primaryexpr ::= ~,+,- primaryexpr 584894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) { 585894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (Lexer.getKind()) { 586894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman default: 587894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unknown token in expression"); 58819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // If we have an error assume that we've already handled it. 58919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case AsmToken::Error: 59019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 591894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::Exclaim: 592894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); // Eat the operator. 593894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParsePrimaryExpr(Res, EndLoc)) 594894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 595894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Res = MCUnaryExpr::CreateLNot(Res, getContext()); 596894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 59719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case AsmToken::Dollar: 598894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::String: 599894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::Identifier: { 60019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EndLoc = Lexer.getLoc(); 60119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 60219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman StringRef Identifier; 60319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (ParseIdentifier(Identifier)) 60419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 60519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 606894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // This is a symbol reference. 60719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman std::pair<StringRef, StringRef> Split = Identifier.split('@'); 608894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCSymbol *Sym = getContext().GetOrCreateSymbol(Split.first); 609894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 610894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Lookup the symbol variant if used. 611894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; 61219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Split.first.size() != Identifier.size()) { 613894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Variant = MCSymbolRefExpr::getVariantKindForName(Split.second); 61419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Variant == MCSymbolRefExpr::VK_Invalid) { 61519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Variant = MCSymbolRefExpr::VK_None; 61619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("invalid variant '" + Split.second + "'"); 61719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 61819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 619894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 620894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If this is an absolute variable reference, substitute it now to preserve 621894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // semantics in the face of reassignment. 622894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Sym->isVariable() && isa<MCConstantExpr>(Sym->getVariableValue())) { 623894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Variant) 62419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return Error(EndLoc, "unexpected modifier on variable reference"); 625894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 626894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Res = Sym->getVariableValue(); 627894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 628894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 629894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 630894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Otherwise create a symbol ref. 631894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Res = MCSymbolRefExpr::Create(Sym, Variant, getContext()); 632894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 633894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 634894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::Integer: { 635894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc Loc = getTok().getLoc(); 636894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t IntVal = getTok().getIntVal(); 637894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Res = MCConstantExpr::Create(IntVal, getContext()); 638894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EndLoc = Lexer.getLoc(); 639894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); // Eat token. 640894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Look for 'b' or 'f' following an Integer as a directional label 641894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Lexer.getKind() == AsmToken::Identifier) { 642894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringRef IDVal = getTok().getString(); 643894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == "f" || IDVal == "b"){ 644894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCSymbol *Sym = Ctx.GetDirectionalLocalSymbol(IntVal, 645894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman IDVal == "f" ? 1 : 0); 646894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Res = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_None, 647894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getContext()); 648894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if(IDVal == "b" && Sym->isUndefined()) 649894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return Error(Loc, "invalid reference to undefined symbol"); 650894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EndLoc = Lexer.getLoc(); 651894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); // Eat identifier. 652894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 653894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 654894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 655894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 65619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case AsmToken::Real: { 65719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman APFloat RealVal(APFloat::IEEEdouble, getTok().getString()); 65819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue(); 65919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Res = MCConstantExpr::Create(IntVal, getContext()); 66019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); // Eat token. 66119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 66219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 663894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::Dot: { 664894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // This is a '.' reference, which references the current PC. Emit a 665894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // temporary label to the streamer and refer to it. 666894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCSymbol *Sym = Ctx.CreateTempSymbol(); 667894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Out.EmitLabel(Sym); 668894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Res = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_None, getContext()); 669894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EndLoc = Lexer.getLoc(); 670894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); // Eat identifier. 671894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 672894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 673894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::LParen: 674894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); // Eat the '('. 675894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseParenExpr(Res, EndLoc); 67619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case AsmToken::LBrac: 67719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!PlatformParser->HasBracketExpressions()) 67819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("brackets expression not supported on this target"); 67919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); // Eat the '['. 68019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseBracketExpr(Res, EndLoc); 681894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::Minus: 682894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); // Eat the operator. 683894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParsePrimaryExpr(Res, EndLoc)) 684894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 685894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Res = MCUnaryExpr::CreateMinus(Res, getContext()); 686894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 687894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::Plus: 688894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); // Eat the operator. 689894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParsePrimaryExpr(Res, EndLoc)) 690894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 691894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Res = MCUnaryExpr::CreatePlus(Res, getContext()); 692894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 693894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::Tilde: 694894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); // Eat the operator. 695894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParsePrimaryExpr(Res, EndLoc)) 696894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 697894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Res = MCUnaryExpr::CreateNot(Res, getContext()); 698894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 699894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 700894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 701894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 702894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseExpression(const MCExpr *&Res) { 703894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc EndLoc; 704894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseExpression(Res, EndLoc); 705894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 706894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 70719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanconst MCExpr * 70819bac1e08be200c31efd26f0f5fd144c9b3eefd3John BaumanAsmParser::ApplyModifierToExpr(const MCExpr *E, 70919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MCSymbolRefExpr::VariantKind Variant) { 71019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Recurse over the given expression, rebuilding it to apply the given variant 71119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // if there is exactly one symbol. 71219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman switch (E->getKind()) { 71319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case MCExpr::Target: 71419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case MCExpr::Constant: 71519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return 0; 71619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 71719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case MCExpr::SymbolRef: { 71819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E); 71919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 72019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (SRE->getKind() != MCSymbolRefExpr::VK_None) { 72119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman TokError("invalid variant on expression '" + 72219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getTok().getIdentifier() + "' (already modified)"); 72319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return E; 72419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 72519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 72619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return MCSymbolRefExpr::Create(&SRE->getSymbol(), Variant, getContext()); 72719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 72819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 72919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case MCExpr::Unary: { 73019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const MCUnaryExpr *UE = cast<MCUnaryExpr>(E); 73119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const MCExpr *Sub = ApplyModifierToExpr(UE->getSubExpr(), Variant); 73219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!Sub) 73319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return 0; 73419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return MCUnaryExpr::Create(UE->getOpcode(), Sub, getContext()); 73519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 73619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 73719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case MCExpr::Binary: { 73819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const MCBinaryExpr *BE = cast<MCBinaryExpr>(E); 73919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const MCExpr *LHS = ApplyModifierToExpr(BE->getLHS(), Variant); 74019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const MCExpr *RHS = ApplyModifierToExpr(BE->getRHS(), Variant); 74119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 74219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!LHS && !RHS) 74319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return 0; 74419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 74519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!LHS) LHS = BE->getLHS(); 74619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!RHS) RHS = BE->getRHS(); 74719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 74819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return MCBinaryExpr::Create(BE->getOpcode(), LHS, RHS, getContext()); 74919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 75019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 75119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 75219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert(0 && "Invalid expression kind!"); 75319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return 0; 75419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 75519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 756894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseExpression - Parse an expression and return it. 75719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// 75819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// expr ::= expr &&,|| expr -> lowest. 75919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// expr ::= expr |,^,&,! expr 76019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// expr ::= expr ==,!=,<>,<,<=,>,>= expr 76119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// expr ::= expr <<,>> expr 76219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// expr ::= expr +,- expr 76319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// expr ::= expr *,/,% expr -> highest. 764894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// expr ::= primaryexpr 765894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 766894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseExpression(const MCExpr *&Res, SMLoc &EndLoc) { 767894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Parse the expression. 768894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Res = 0; 769894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParsePrimaryExpr(Res, EndLoc) || ParseBinOpRHS(1, Res, EndLoc)) 770894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 771894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 77219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // As a special case, we support 'a op b @ modifier' by rewriting the 77319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // expression to include the modifier. This is inefficient, but in general we 77419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // expect users to use 'a@modifier op b'. 77519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Lexer.getKind() == AsmToken::At) { 77619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 77719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 77819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Lexer.isNot(AsmToken::Identifier)) 77919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("unexpected symbol modifier following '@'"); 78019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 78119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MCSymbolRefExpr::VariantKind Variant = 78219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier()); 78319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Variant == MCSymbolRefExpr::VK_Invalid) 78419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("invalid variant '" + getTok().getIdentifier() + "'"); 78519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 78619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const MCExpr *ModifiedRes = ApplyModifierToExpr(Res, Variant); 78719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!ModifiedRes) { 78819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("invalid modifier '" + getTok().getIdentifier() + 78919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman "' (no symbols present)"); 79019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 79119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 79219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 79319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Res = ModifiedRes; 79419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 79519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 79619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 797894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Try to constant fold it up front, if possible. 798894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t Value; 799894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Res->EvaluateAsAbsolute(Value)) 800894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Res = MCConstantExpr::Create(Value, getContext()); 801894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 802894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 803894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 804894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 805894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) { 806894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Res = 0; 807894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseParenExpr(Res, EndLoc) || 808894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ParseBinOpRHS(1, Res, EndLoc); 809894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 810894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 811894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseAbsoluteExpression(int64_t &Res) { 812894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const MCExpr *Expr; 81319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 814894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc StartLoc = Lexer.getLoc(); 815894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseExpression(Expr)) 816894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 817894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 818894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!Expr->EvaluateAsAbsolute(Res)) 819894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return Error(StartLoc, "expected absolute expression"); 820894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 821894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 822894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 823894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 82419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanstatic unsigned getBinOpPrecedence(AsmToken::TokenKind K, 825894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCBinaryExpr::Opcode &Kind) { 826894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (K) { 827894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman default: 828894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 0; // not a binop. 829894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 830894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Lowest Precedence: &&, || 831894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::AmpAmp: 832894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Kind = MCBinaryExpr::LAnd; 833894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 1; 834894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::PipePipe: 835894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Kind = MCBinaryExpr::LOr; 836894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 1; 837894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 83819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 83919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Low Precedence: |, &, ^ 84019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // 84119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // FIXME: gas seems to support '!' as an infix operator? 84219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case AsmToken::Pipe: 84319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Kind = MCBinaryExpr::Or; 844894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 2; 84519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case AsmToken::Caret: 84619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Kind = MCBinaryExpr::Xor; 84719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return 2; 84819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case AsmToken::Amp: 84919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Kind = MCBinaryExpr::And; 850894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 2; 85119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 85219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Low Intermediate Precedence: ==, !=, <>, <, <=, >, >= 853894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::EqualEqual: 854894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Kind = MCBinaryExpr::EQ; 85519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return 3; 856894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::ExclaimEqual: 857894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::LessGreater: 858894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Kind = MCBinaryExpr::NE; 85919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return 3; 860894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::Less: 861894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Kind = MCBinaryExpr::LT; 86219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return 3; 863894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::LessEqual: 864894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Kind = MCBinaryExpr::LTE; 86519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return 3; 866894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::Greater: 867894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Kind = MCBinaryExpr::GT; 86819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return 3; 869894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::GreaterEqual: 870894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Kind = MCBinaryExpr::GTE; 871894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 3; 872894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 87319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Intermediate Precedence: <<, >> 874894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::LessLess: 875894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Kind = MCBinaryExpr::Shl; 876894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 4; 877894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::GreaterGreater: 878894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Kind = MCBinaryExpr::Shr; 879894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 4; 88019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 88119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // High Intermediate Precedence: +, - 88219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case AsmToken::Plus: 88319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Kind = MCBinaryExpr::Add; 88419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return 5; 88519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case AsmToken::Minus: 88619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Kind = MCBinaryExpr::Sub; 88719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return 5; 88819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 88919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Highest Precedence: *, /, % 89019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case AsmToken::Star: 89119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Kind = MCBinaryExpr::Mul; 89219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return 6; 89319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case AsmToken::Slash: 89419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Kind = MCBinaryExpr::Div; 89519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return 6; 89619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case AsmToken::Percent: 89719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Kind = MCBinaryExpr::Mod; 89819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return 6; 899894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 900894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 901894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 902894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 903894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseBinOpRHS - Parse all binary operators with precedence >= 'Precedence'. 904894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// Res contains the LHS of the expression on input. 905894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseBinOpRHS(unsigned Precedence, const MCExpr *&Res, 906894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc &EndLoc) { 907894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman while (1) { 908894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add; 909894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind); 91019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 911894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the next token is lower precedence than we are allowed to eat, return 912894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // successfully with what we ate already. 913894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TokPrec < Precedence) 914894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 91519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 916894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 91719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 918894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Eat the next primary expression. 919894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const MCExpr *RHS; 920894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParsePrimaryExpr(RHS, EndLoc)) return true; 92119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 922894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If BinOp binds less tightly with RHS than the operator after RHS, let 923894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // the pending operator take RHS as its LHS. 924894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCBinaryExpr::Opcode Dummy; 925894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy); 926894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TokPrec < NextTokPrec) { 927894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseBinOpRHS(Precedence+1, RHS, EndLoc)) return true; 928894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 929894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 930894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Merge LHS and RHS according to operator. 931894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Res = MCBinaryExpr::Create(Kind, Res, RHS, getContext()); 932894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 933894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 934894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 93519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 93619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 93719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 938894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseStatement: 939894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= EndOfStatement 940894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= Label* Directive ...Operands... EndOfStatement 941894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= Label* Identifier OperandList* EndOfStatement 942894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseStatement() { 943894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Lexer.is(AsmToken::EndOfStatement)) { 944894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Out.AddBlankLine(); 945894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 946894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 947894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 948894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 94919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Statements always start with an identifier or are a full line comment. 950894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AsmToken ID = getTok(); 951894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc IDLoc = ID.getLoc(); 952894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringRef IDVal; 953894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t LocalLabelVal = -1; 95419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // A full line comment is a '#' as the first token. 95519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Lexer.is(AsmToken::Hash)) 95619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseCppHashLineFilenameComment(IDLoc); 95719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 95819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Allow an integer followed by a ':' as a directional local label. 959894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Lexer.is(AsmToken::Integer)) { 960894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman LocalLabelVal = getTok().getIntVal(); 961894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (LocalLabelVal < 0) { 962894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!TheCondState.Ignore) 963894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token at start of statement"); 964894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman IDVal = ""; 965894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 966894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else { 967894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman IDVal = getTok().getString(); 968894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); // Consume the integer token to be used as an identifier token. 969894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Lexer.getKind() != AsmToken::Colon) { 970894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!TheCondState.Ignore) 971894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token at start of statement"); 972894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 973894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 97419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 97519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else if (Lexer.is(AsmToken::Dot)) { 97619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Treat '.' as a valid identifier in this context. 97719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 97819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman IDVal = "."; 97919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 98019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else if (ParseIdentifier(IDVal)) { 981894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!TheCondState.Ignore) 982894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token at start of statement"); 983894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman IDVal = ""; 984894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 985894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 98619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 987894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Handle conditional assembly here before checking for skipping. We 988894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // have to do this so that .endif isn't skipped in a ".if 0" block for 989894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // example. 990894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".if") 991894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveIf(IDLoc); 99219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".ifdef") 99319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseDirectiveIfdef(IDLoc, true); 99419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".ifndef" || IDVal == ".ifnotdef") 99519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseDirectiveIfdef(IDLoc, false); 996894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".elseif") 997894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveElseIf(IDLoc); 998894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".else") 999894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveElse(IDLoc); 1000894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".endif") 1001894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveEndIf(IDLoc); 100219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1003894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If we are in a ".if 0" block, ignore this statement. 1004894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TheCondState.Ignore) { 1005894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EatToEndOfStatement(); 1006894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1007894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 100819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1009894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: Recurse on local labels? 1010894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1011894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // See what kind of statement we have. 1012894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (Lexer.getKind()) { 1013894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::Colon: { 101419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CheckForValidSection(); 101519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1016894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // identifier ':' -> Label. 1017894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1018894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 101919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Diagnose attempt to use '.' as a label. 102019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".") 102119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label"); 102219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1023894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Diagnose attempt to use a variable as a label. 1024894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // 1025894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: Diagnostics. Note the location of the definition as a label. 1026894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: This doesn't diagnose assignment to a symbol which has been 1027894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // implicitly marked as external. 1028894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCSymbol *Sym; 1029894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (LocalLabelVal == -1) 1030894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Sym = getContext().GetOrCreateSymbol(IDVal); 1031894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else 1032894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Sym = Ctx.CreateDirectionalLocalSymbol(LocalLabelVal); 1033894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!Sym->isUndefined() || Sym->isVariable()) 1034894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return Error(IDLoc, "invalid symbol redefinition"); 103519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1036894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Emit the label. 1037894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Out.EmitLabel(Sym); 103819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1039894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Consume any end of statement token, if present, to avoid spurious 1040894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // AddBlankLine calls(). 1041894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Lexer.is(AsmToken::EndOfStatement)) { 1042894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1043894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Lexer.is(AsmToken::Eof)) 1044894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1045894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1046894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1047894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseStatement(); 1048894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1049894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1050894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case AsmToken::Equal: 1051894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // identifier '=' ... -> assignment statement 1052894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1053894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 105419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseAssignment(IDVal, true); 1055894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1056894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman default: // Normal instruction or directive. 1057894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1058894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1059894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1060894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If macros are enabled, check to see if this is a macro instantiation. 1061894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (MacrosEnabled) 1062894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (const Macro *M = MacroMap.lookup(IDVal)) 1063894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return HandleMacroEntry(IDVal, IDLoc, M); 1064894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 106519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Otherwise, we have a normal instruction or directive. 106619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal[0] == '.' && IDVal != ".") { 1067894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Assembler features 106819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".set" || IDVal == ".equ") 106919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseDirectiveSet(IDVal, true); 107019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".equiv") 107119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseDirectiveSet(IDVal, false); 1072894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1073894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Data directives 1074894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1075894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".ascii") 107619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseDirectiveAscii(IDVal, false); 107719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".asciz" || IDVal == ".string") 107819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseDirectiveAscii(IDVal, true); 1079894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1080894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".byte") 1081894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveValue(1); 1082894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".short") 1083894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveValue(2); 108419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".value") 108519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseDirectiveValue(2); 108619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".2byte") 108719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseDirectiveValue(2); 1088894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".long") 1089894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveValue(4); 109019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".int") 109119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseDirectiveValue(4); 109219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".4byte") 109319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseDirectiveValue(4); 1094894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".quad") 1095894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveValue(8); 109619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".8byte") 109719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseDirectiveValue(8); 109819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".single" || IDVal == ".float") 109919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseDirectiveRealValue(APFloat::IEEEsingle); 110019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".double") 110119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseDirectiveRealValue(APFloat::IEEEdouble); 1102894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1103894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".align") { 1104894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool IsPow2 = !getContext().getAsmInfo().getAlignmentIsInBytes(); 1105894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveAlign(IsPow2, /*ExprSize=*/1); 1106894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1107894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".align32") { 1108894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool IsPow2 = !getContext().getAsmInfo().getAlignmentIsInBytes(); 1109894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveAlign(IsPow2, /*ExprSize=*/4); 1110894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1111894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".balign") 1112894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1); 1113894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".balignw") 1114894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2); 1115894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".balignl") 1116894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4); 1117894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".p2align") 1118894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1); 1119894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".p2alignw") 1120894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2); 1121894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".p2alignl") 1122894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4); 1123894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1124894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".org") 1125894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveOrg(); 1126894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1127894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".fill") 1128894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveFill(); 112919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".space" || IDVal == ".skip") 1130894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveSpace(); 113119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".zero") 113219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseDirectiveZero(); 1133894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1134894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Symbol attribute directives 1135894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1136894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".globl" || IDVal == ".global") 1137894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveSymbolAttribute(MCSA_Global); 1138894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".indirect_symbol") 1139894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveSymbolAttribute(MCSA_IndirectSymbol); 1140894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".lazy_reference") 1141894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveSymbolAttribute(MCSA_LazyReference); 1142894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".no_dead_strip") 1143894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveSymbolAttribute(MCSA_NoDeadStrip); 114419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".symbol_resolver") 114519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseDirectiveSymbolAttribute(MCSA_SymbolResolver); 1146894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".private_extern") 1147894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveSymbolAttribute(MCSA_PrivateExtern); 1148894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".reference") 1149894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveSymbolAttribute(MCSA_Reference); 1150894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".weak_definition") 1151894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveSymbolAttribute(MCSA_WeakDefinition); 1152894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".weak_reference") 1153894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveSymbolAttribute(MCSA_WeakReference); 1154894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".weak_def_can_be_hidden") 1155894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate); 1156894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 115719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".comm" || IDVal == ".common") 1158894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveComm(/*IsLocal=*/false); 1159894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".lcomm") 1160894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveComm(/*IsLocal=*/true); 1161894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1162894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".abort") 1163894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveAbort(); 1164894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IDVal == ".include") 1165894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return ParseDirectiveInclude(); 1166894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 116719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".code16") 116819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError(Twine(IDVal) + " not supported yet"); 116919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1170894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Look up the handler in the handler table. 1171894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman std::pair<MCAsmParserExtension*, DirectiveHandler> Handler = 1172894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DirectiveMap.lookup(IDVal); 1173894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Handler.first) 1174894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return (*Handler.second)(Handler.first, IDVal, IDLoc); 1175894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1176894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Target hook for parsing target specific directives. 1177894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!getTargetParser().ParseDirective(ID)) 1178894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1179894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 118019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool retval = Warning(IDLoc, "ignoring directive for now"); 1181894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EatToEndOfStatement(); 118219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return retval; 1183894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1184894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 118519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CheckForValidSection(); 118619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1187894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Canonicalize the opcode to lower case. 1188894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SmallString<128> Opcode; 1189894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned i = 0, e = IDVal.size(); i != e; ++i) 1190894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Opcode.push_back(tolower(IDVal[i])); 119119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1192894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SmallVector<MCParsedAsmOperand*, 8> ParsedOperands; 1193894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool HadError = getTargetParser().ParseInstruction(Opcode.str(), IDLoc, 1194894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ParsedOperands); 1195894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 119619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Dump the parsed representation, if requested. 119719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getShowParsedOperands()) { 119819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SmallString<256> Str; 119919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman raw_svector_ostream OS(Str); 120019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman OS << "parsed instruction: ["; 120119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman for (unsigned i = 0; i != ParsedOperands.size(); ++i) { 120219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (i != 0) 120319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman OS << ", "; 120419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ParsedOperands[i]->print(OS); 1205894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 120619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman OS << "]"; 120719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 120819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman PrintMessage(IDLoc, OS.str(), "note"); 1209894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1210894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 121119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // If parsing succeeded, match the instruction. 1212894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!HadError) 121319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman HadError = getTargetParser().MatchAndEmitInstruction(IDLoc, ParsedOperands, 121419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Out); 1215894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1216894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Free any parsed operands. 1217894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned i = 0, e = ParsedOperands.size(); i != e; ++i) 1218894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman delete ParsedOperands[i]; 1219894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 122019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Don't skip the rest of the line, the instruction parser is responsible for 122119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // that. 122219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 1223894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1224894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 122519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// EatToEndOfLine uses the Lexer to eat the characters to the end of the line 122619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// since they may not be able to be tokenized to get to the end of line token. 122719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanvoid AsmParser::EatToEndOfLine() { 122819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!Lexer.is(AsmToken::EndOfStatement)) 122919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lexer.LexUntilEndOfLine(); 123019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Eat EOL. 123119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 123219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 123319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 123419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseCppHashLineFilenameComment as this: 123519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= # number "filename" 123619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// or just as a full line comment if it doesn't have a number and a string. 123719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool AsmParser::ParseCppHashLineFilenameComment(const SMLoc &L) { 123819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); // Eat the hash token. 123919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 124019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().isNot(AsmToken::Integer)) { 124119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Consume the line since in cases it is not a well-formed line directive, 124219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // as if were simply a full line comment. 124319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EatToEndOfLine(); 124419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 124519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 124619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 124719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t LineNumber = getTok().getIntVal(); 124819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 124919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 125019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().isNot(AsmToken::String)) { 125119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EatToEndOfLine(); 125219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 125319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 125419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 125519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman StringRef Filename = getTok().getString(); 125619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Get rid of the enclosing quotes. 125719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Filename = Filename.substr(1, Filename.size()-2); 125819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 125919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Save the SMLoc, Filename and LineNumber for later use by diagnostics. 126019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CppHashLoc = L; 126119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CppHashFilename = Filename; 126219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CppHashLineNumber = LineNumber; 126319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 126419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Ignore any trailing characters, they're just comment. 126519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EatToEndOfLine(); 126619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 126719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 126819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 126919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// DiagHandler - will use the the last parsed cpp hash line filename comment 127019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// for the Filename and LineNo if any in the diagnostic. 127119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanvoid AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) { 127219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const AsmParser *Parser = static_cast<const AsmParser*>(Context); 127319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman raw_ostream &OS = errs(); 127419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 127519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr(); 127619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const SMLoc &DiagLoc = Diag.getLoc(); 127719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc); 127819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int CppHashBuf = Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashLoc); 127919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 128019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Like SourceMgr::PrintMessage() we need to print the include stack if any 128119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // before printing the message. 128219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc); 128319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!Parser->SavedDiagHandler && DiagCurBuffer > 0) { 128419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer); 128519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS); 128619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 128719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 128819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // If we have not parsed a cpp hash line filename comment or the source 128919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // manager changed or buffer changed (like in a nested include) then just 129019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // print the normal diagnostic using its Filename and LineNo. 129119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!Parser->CppHashLineNumber || 129219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman &DiagSrcMgr != &Parser->SrcMgr || 129319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman DiagBuf != CppHashBuf) { 129419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Parser->SavedDiagHandler) 129519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext); 129619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else 129719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Diag.Print(0, OS); 129819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return; 129919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 130019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 130119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Use the CppHashFilename and calculate a line number based on the 130219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // CppHashLoc and CppHashLineNumber relative to this Diag's SMLoc for 130319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // the diagnostic. 130419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const std::string Filename = Parser->CppHashFilename; 130519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 130619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf); 130719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int CppHashLocLineNo = 130819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Parser->SrcMgr.FindLineNumber(Parser->CppHashLoc, CppHashBuf); 130919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int LineNo = Parser->CppHashLineNumber - 1 + 131019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman (DiagLocLineNo - CppHashLocLineNo); 131119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 131219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMDiagnostic NewDiag(*Diag.getSourceMgr(), 131319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Diag.getLoc(), 131419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Filename, 131519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman LineNo, 131619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Diag.getColumnNo(), 131719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Diag.getMessage(), 131819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Diag.getLineContents(), 131919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Diag.getShowLine()); 132019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 132119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Parser->SavedDiagHandler) 132219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Parser->SavedDiagHandler(NewDiag, Parser->SavedDiagContext); 132319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else 132419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman NewDiag.Print(0, OS); 132519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 132619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 132719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool AsmParser::expandMacro(SmallString<256> &Buf, StringRef Body, 132819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const std::vector<StringRef> &Parameters, 132919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const std::vector<std::vector<AsmToken> > &A, 133019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const SMLoc &L) { 1331894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman raw_svector_ostream OS(Buf); 133219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned NParameters = Parameters.size(); 133319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (NParameters != 0 && NParameters != A.size()) 133419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return Error(L, "Wrong number of arguments"); 1335894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1336894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman while (!Body.empty()) { 1337894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Scan for the next substitution. 1338894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman std::size_t End = Body.size(), Pos = 0; 1339894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (; Pos != End; ++Pos) { 1340894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Check for a substitution or escape. 134119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!NParameters) { 134219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // This macro has no parameters, look for $0, $1, etc. 134319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Body[Pos] != '$' || Pos + 1 == End) 134419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman continue; 134519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 134619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman char Next = Body[Pos + 1]; 134719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Next == '$' || Next == 'n' || isdigit(Next)) 134819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 134919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else { 135019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // This macro has parameters, look for \foo, \bar, etc. 135119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Body[Pos] == '\\' && Pos + 1 != End) 135219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 135319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 1354894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1355894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1356894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Add the prefix. 1357894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman OS << Body.slice(0, Pos); 1358894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1359894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Check if we reached the end. 1360894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Pos == End) 1361894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1362894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 136319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!NParameters) { 136419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman switch (Body[Pos+1]) { 136519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // $$ => $ 136619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case '$': 136719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman OS << '$'; 136819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 1369894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 137019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // $n => number of arguments 137119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 'n': 137219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman OS << A.size(); 137319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 1374894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 137519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // $[0-9] => argument 137619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman default: { 137719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Missing arguments are ignored. 137819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned Index = Body[Pos+1] - '0'; 137919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Index >= A.size()) 138019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 138119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 138219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Otherwise substitute with the token values, with spaces eliminated. 138319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman for (std::vector<AsmToken>::const_iterator it = A[Index].begin(), 138419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ie = A[Index].end(); it != ie; ++it) 138519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman OS << it->getString(); 1386894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 138719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 138819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 138919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Pos += 2; 139019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else { 139119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned I = Pos + 1; 139219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman while (isalnum(Body[I]) && I + 1 != End) 139319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ++I; 139419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 139519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const char *Begin = Body.data() + Pos +1; 139619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman StringRef Argument(Begin, I - (Pos +1)); 139719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned Index = 0; 139819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman for (; Index < NParameters; ++Index) 139919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Parameters[Index] == Argument) 140019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 140119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 140219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // FIXME: We should error at the macro definition. 140319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Index == NParameters) 140419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return Error(L, "Parameter not found"); 1405894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1406894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (std::vector<AsmToken>::const_iterator it = A[Index].begin(), 1407894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ie = A[Index].end(); it != ie; ++it) 1408894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman OS << it->getString(); 1409894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 141019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Pos += 1 + Argument.size(); 141119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 1412894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Update the scan point. 141319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Body = Body.substr(Pos); 1414894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1415894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1416894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // We include the .endmacro in the buffer as our queue to exit the macro 1417894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // instantiation. 1418894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman OS << ".endmacro\n"; 141919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 142019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 1421894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 142219bac1e08be200c31efd26f0f5fd144c9b3eefd3John BaumanMacroInstantiation::MacroInstantiation(const Macro *M, SMLoc IL, SMLoc EL, 142319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MemoryBuffer *I) 142419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman : TheMacro(M), Instantiation(I), InstantiationLoc(IL), ExitLoc(EL) 142519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman{ 1426894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1427894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1428894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::HandleMacroEntry(StringRef Name, SMLoc NameLoc, 1429894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const Macro *M) { 1430894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Arbitrarily limit macro nesting depth, to match 'as'. We can eliminate 1431894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // this, although we should protect against infinite loops. 1432894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ActiveMacros.size() == 20) 1433894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("macros cannot be nested more than 20 levels deep"); 1434894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1435894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Parse the macro instantiation arguments. 1436894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman std::vector<std::vector<AsmToken> > MacroArguments; 1437894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MacroArguments.push_back(std::vector<AsmToken>()); 1438894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned ParenLevel = 0; 1439894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (;;) { 1440894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Lexer.is(AsmToken::Eof)) 1441894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in macro instantiation"); 1442894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Lexer.is(AsmToken::EndOfStatement)) 1443894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1444894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1445894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If we aren't inside parentheses and this is a comma, start a new token 1446894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // list. 1447894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParenLevel == 0 && Lexer.is(AsmToken::Comma)) { 1448894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MacroArguments.push_back(std::vector<AsmToken>()); 1449894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else { 1450894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Adjust the current parentheses level. 1451894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Lexer.is(AsmToken::LParen)) 1452894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ++ParenLevel; 1453894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (Lexer.is(AsmToken::RParen) && ParenLevel) 1454894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman --ParenLevel; 1455894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1456894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Append the token to the current argument list. 1457894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MacroArguments.back().push_back(getTok()); 1458894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1459894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1460894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1461894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 146219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Macro instantiation is lexical, unfortunately. We construct a new buffer 146319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // to hold the macro body with substitutions. 146419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SmallString<256> Buf; 146519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman StringRef Body = M->Body; 146619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 146719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (expandMacro(Buf, Body, M->Parameters, MacroArguments, getTok().getLoc())) 146819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 146919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 147019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MemoryBuffer *Instantiation = 147119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MemoryBuffer::getMemBufferCopy(Buf.str(), "<instantiation>"); 147219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1473894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Create the macro instantiation object and add to the current macro 1474894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // instantiation stack. 1475894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MacroInstantiation *MI = new MacroInstantiation(M, NameLoc, 1476894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getTok().getLoc(), 147719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Instantiation); 1478894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ActiveMacros.push_back(MI); 1479894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1480894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Jump to the macro instantiation and prime the lexer. 1481894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CurBuffer = SrcMgr.AddNewSourceBuffer(MI->Instantiation, SMLoc()); 1482894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)); 1483894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1484894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1485894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1486894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1487894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1488894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanvoid AsmParser::HandleMacroExit() { 1489894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Jump to the EndOfStatement we should return to, and consume it. 1490894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman JumpToLoc(ActiveMacros.back()->ExitLoc); 1491894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1492894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1493894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Pop the instantiation entry. 1494894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman delete ActiveMacros.back(); 1495894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ActiveMacros.pop_back(); 1496894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1497894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 149819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanstatic void MarkUsed(const MCExpr *Value) { 149919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman switch (Value->getKind()) { 150019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case MCExpr::Binary: 150119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MarkUsed(static_cast<const MCBinaryExpr*>(Value)->getLHS()); 150219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MarkUsed(static_cast<const MCBinaryExpr*>(Value)->getRHS()); 150319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 150419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case MCExpr::Target: 150519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case MCExpr::Constant: 150619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 150719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case MCExpr::SymbolRef: { 150819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman static_cast<const MCSymbolRefExpr*>(Value)->getSymbol().setUsed(true); 150919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 151019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 151119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case MCExpr::Unary: 151219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MarkUsed(static_cast<const MCUnaryExpr*>(Value)->getSubExpr()); 151319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 151419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 151519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 151619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 151719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool AsmParser::ParseAssignment(StringRef Name, bool allow_redef) { 1518894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: Use better location, we should use proper tokens. 1519894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc EqualLoc = Lexer.getLoc(); 1520894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1521894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const MCExpr *Value; 1522894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseExpression(Value)) 1523894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 152419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 152519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MarkUsed(Value); 152619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1527894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Lexer.isNot(AsmToken::EndOfStatement)) 1528894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in assignment"); 1529894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 153019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Error on assignment to '.'. 153119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Name == ".") { 153219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return Error(EqualLoc, ("assignment to pseudo-symbol '.' is unsupported " 153319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman "(use '.space' or '.org').)")); 153419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 153519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1536894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Eat the end of statement marker. 1537894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1538894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1539894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Validate that the LHS is allowed to be a variable (either it has not been 1540894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // used as a symbol, or it is an absolute symbol). 1541894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCSymbol *Sym = getContext().LookupSymbol(Name); 1542894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Sym) { 1543894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Diagnose assignment to a label. 1544894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // 1545894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: Diagnostics. Note the location of the definition as a label. 1546894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: Diagnose assignment to protected identifier (e.g., register name). 154719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Sym->isUndefined() && !Sym->isUsed() && !Sym->isVariable()) 1548894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ; // Allow redefinitions of undefined symbols only used in directives. 154919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else if (!Sym->isUndefined() && (!Sym->isVariable() || !allow_redef)) 1550894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return Error(EqualLoc, "redefinition of '" + Name + "'"); 1551894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (!Sym->isVariable()) 1552894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return Error(EqualLoc, "invalid assignment to '" + Name + "'"); 1553894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (!isa<MCConstantExpr>(Sym->getVariableValue())) 1554894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return Error(EqualLoc, "invalid reassignment of non-absolute variable '" + 1555894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Name + "'"); 155619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 155719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Don't count these checks as uses. 155819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Sym->setUsed(false); 1559894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else 1560894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Sym = getContext().GetOrCreateSymbol(Name); 1561894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1562894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: Handle '.'. 1563894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1564894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Do the assignment. 1565894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Out.EmitAssignment(Sym, Value); 1566894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1567894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1568894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1569894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1570894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseIdentifier: 1571894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= identifier 1572894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= string 1573894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseIdentifier(StringRef &Res) { 157419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // The assembler has relaxed rules for accepting identifiers, in particular we 157519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // allow things like '.globl $foo', which would normally be separate 157619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // tokens. At this level, we have already lexed so we cannot (currently) 157719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // handle this as a context dependent token, instead we detect adjacent tokens 157819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // and return the combined identifier. 157919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Lexer.is(AsmToken::Dollar)) { 158019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc DollarLoc = getLexer().getLoc(); 158119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 158219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Consume the dollar sign, and check for a following identifier. 158319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 158419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Lexer.isNot(AsmToken::Identifier)) 158519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 158619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 158719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // We have a '$' followed by an identifier, make sure they are adjacent. 158819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (DollarLoc.getPointer() + 1 != getTok().getLoc().getPointer()) 158919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 159019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 159119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Construct the joined identifier and consume the token. 159219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Res = StringRef(DollarLoc.getPointer(), 159319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getTok().getIdentifier().size() + 1); 159419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 159519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 159619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 159719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 159819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Lexer.isNot(AsmToken::Identifier) && 159919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lexer.isNot(AsmToken::String)) 160019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 1601894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1602894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Res = getTok().getIdentifier(); 1603894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1604894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); // Consume the identifier token. 1605894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1606894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1607894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1608894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1609894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveSet: 161019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .equ identifier ',' expression 161119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .equiv identifier ',' expression 1612894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= .set identifier ',' expression 161319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool AsmParser::ParseDirectiveSet(StringRef IDVal, bool allow_redef) { 1614894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringRef Name; 1615894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1616894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseIdentifier(Name)) 161719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("expected identifier after '" + Twine(IDVal) + "'"); 161819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1619894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::Comma)) 162019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("unexpected token in '" + Twine(IDVal) + "'"); 1621894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1622894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 162319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ParseAssignment(Name, allow_redef); 1624894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1625894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1626894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseEscapedString(std::string &Data) { 1627894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(getLexer().is(AsmToken::String) && "Unexpected current token!"); 1628894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1629894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Data = ""; 1630894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringRef Str = getTok().getStringContents(); 1631894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned i = 0, e = Str.size(); i != e; ++i) { 1632894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Str[i] != '\\') { 1633894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Data += Str[i]; 1634894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman continue; 1635894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1636894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1637894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Recognize escaped characters. Note that this escape semantics currently 1638894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // loosely follows Darwin 'as'. Notably, it doesn't support hex escapes. 1639894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ++i; 1640894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (i == e) 1641894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected backslash at end of string"); 1642894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1643894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Recognize octal sequences. 1644894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((unsigned) (Str[i] - '0') <= 7) { 1645894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Consume up to three octal characters. 1646894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned Value = Str[i] - '0'; 1647894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1648894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (i + 1 != e && ((unsigned) (Str[i + 1] - '0')) <= 7) { 1649894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ++i; 1650894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Value = Value * 8 + (Str[i] - '0'); 1651894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1652894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (i + 1 != e && ((unsigned) (Str[i + 1] - '0')) <= 7) { 1653894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ++i; 1654894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Value = Value * 8 + (Str[i] - '0'); 1655894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1656894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1657894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1658894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Value > 255) 1659894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("invalid octal escape sequence (out of range)"); 1660894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1661894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Data += (unsigned char) Value; 1662894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman continue; 1663894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1664894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1665894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Otherwise recognize individual escapes. 1666894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (Str[i]) { 1667894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman default: 1668894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Just reject invalid escape sequences for now. 1669894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("invalid escape sequence (unrecognized character)"); 1670894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1671894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'b': Data += '\b'; break; 1672894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'f': Data += '\f'; break; 1673894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'n': Data += '\n'; break; 1674894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'r': Data += '\r'; break; 1675894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 't': Data += '\t'; break; 1676894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case '"': Data += '"'; break; 1677894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case '\\': Data += '\\'; break; 1678894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1679894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1680894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1681894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1682894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1683894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1684894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveAscii: 168519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= ( .ascii | .asciz | .string ) [ "string" ( , "string" )* ] 168619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool AsmParser::ParseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) { 1687894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) { 168819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CheckForValidSection(); 168919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1690894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (;;) { 1691894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::String)) 169219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("expected string in '" + Twine(IDVal) + "' directive"); 1693894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1694894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman std::string Data; 1695894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseEscapedString(Data)) 1696894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1697894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1698894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getStreamer().EmitBytes(Data, DEFAULT_ADDRSPACE); 1699894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ZeroTerminated) 1700894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getStreamer().EmitBytes(StringRef("\0", 1), DEFAULT_ADDRSPACE); 1701894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1702894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1703894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1704894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().is(AsmToken::EndOfStatement)) 1705894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1706894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1707894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::Comma)) 170819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("unexpected token in '" + Twine(IDVal) + "' directive"); 1709894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1710894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1711894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1712894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1713894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1714894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1715894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1716894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1717894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveValue 1718894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= (.byte | .short | ... ) [ expression (, expression)* ] 1719894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseDirectiveValue(unsigned Size) { 1720894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) { 172119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CheckForValidSection(); 172219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1723894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (;;) { 1724894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const MCExpr *Value; 172519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc ExprLoc = getLexer().getLoc(); 1726894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseExpression(Value)) 1727894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1728894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1729894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Special case constant expressions to match code generator. 173019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { 173119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert(Size <= 8 && "Invalid size"); 173219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman uint64_t IntValue = MCE->getValue(); 173319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue)) 173419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return Error(ExprLoc, "literal value out of range for directive"); 173519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitIntValue(IntValue, Size, DEFAULT_ADDRSPACE); 173619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else 1737894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getStreamer().EmitValue(Value, Size, DEFAULT_ADDRSPACE); 1738894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1739894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().is(AsmToken::EndOfStatement)) 1740894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 174119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1742894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: Improve diagnostic. 1743894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::Comma)) 1744894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in directive"); 1745894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1746894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1747894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1748894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1749894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1750894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1751894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1752894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 175319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseDirectiveRealValue 175419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= (.single | .double) [ expression (, expression)* ] 175519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool AsmParser::ParseDirectiveRealValue(const fltSemantics &Semantics) { 175619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) { 175719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CheckForValidSection(); 175819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 175919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman for (;;) { 176019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // We don't truly support arithmetic on floating point expressions, so we 176119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // have to manually parse unary prefixes. 176219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool IsNeg = false; 176319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().is(AsmToken::Minus)) { 176419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 176519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman IsNeg = true; 176619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else if (getLexer().is(AsmToken::Plus)) 176719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 176819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 176919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().isNot(AsmToken::Integer) && 177019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getLexer().isNot(AsmToken::Real) && 177119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getLexer().isNot(AsmToken::Identifier)) 177219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("unexpected token in directive"); 177319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 177419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Convert to an APFloat. 177519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman APFloat Value(Semantics); 177619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman StringRef IDVal = getTok().getString(); 177719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().is(AsmToken::Identifier)) { 177819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf")) 177919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Value = APFloat::getInf(Semantics); 178019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else if (!IDVal.compare_lower("nan")) 178119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Value = APFloat::getNaN(Semantics, false, ~0); 178219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else 178319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("invalid floating point literal"); 178419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else if (Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven) == 178519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman APFloat::opInvalidOp) 178619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("invalid floating point literal"); 178719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IsNeg) 178819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Value.changeSign(); 178919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 179019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Consume the numeric token. 179119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 179219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 179319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Emit the value as an integer. 179419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman APInt AsInt = Value.bitcastToAPInt(); 179519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitIntValue(AsInt.getLimitedValue(), 179619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AsInt.getBitWidth() / 8, DEFAULT_ADDRSPACE); 179719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 179819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().is(AsmToken::EndOfStatement)) 179919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 180019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 180119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().isNot(AsmToken::Comma)) 180219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("unexpected token in directive"); 180319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 180419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 180519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 180619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 180719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 180819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 180919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 181019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1811894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveSpace 1812894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= .space expression [ , expression ] 1813894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseDirectiveSpace() { 181419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CheckForValidSection(); 181519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1816894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t NumBytes; 1817894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseAbsoluteExpression(NumBytes)) 1818894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1819894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1820894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t FillExpr = 0; 1821894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) { 1822894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::Comma)) 1823894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.space' directive"); 1824894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 182519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1826894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseAbsoluteExpression(FillExpr)) 1827894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1828894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1829894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 1830894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.space' directive"); 1831894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1832894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1833894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1834894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1835894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (NumBytes <= 0) 1836894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("invalid number of bytes in '.space' directive"); 1837894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1838894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0. 1839894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getStreamer().EmitFill(NumBytes, FillExpr, DEFAULT_ADDRSPACE); 1840894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1841894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1842894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1843894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 184419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseDirectiveZero 184519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .zero expression 184619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool AsmParser::ParseDirectiveZero() { 184719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CheckForValidSection(); 184819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 184919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t NumBytes; 185019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (ParseAbsoluteExpression(NumBytes)) 185119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 185219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 185319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t Val = 0; 185419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().is(AsmToken::Comma)) { 185519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 185619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (ParseAbsoluteExpression(Val)) 185719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 185819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 185919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 186019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 186119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("unexpected token in '.zero' directive"); 186219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 186319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 186419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 186519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitFill(NumBytes, Val, DEFAULT_ADDRSPACE); 186619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 186719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 186819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 186919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1870894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveFill 1871894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= .fill expression , expression , expression 1872894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseDirectiveFill() { 187319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CheckForValidSection(); 187419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1875894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t NumValues; 1876894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseAbsoluteExpression(NumValues)) 1877894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1878894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1879894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::Comma)) 1880894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.fill' directive"); 1881894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 188219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1883894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t FillSize; 1884894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseAbsoluteExpression(FillSize)) 1885894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1886894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1887894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::Comma)) 1888894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.fill' directive"); 1889894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 189019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1891894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t FillExpr; 1892894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseAbsoluteExpression(FillExpr)) 1893894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1894894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1895894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 1896894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.fill' directive"); 189719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1898894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1899894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1900894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (FillSize != 1 && FillSize != 2 && FillSize != 4 && FillSize != 8) 1901894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("invalid '.fill' size, expected 1, 2, 4, or 8"); 1902894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1903894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (uint64_t i = 0, e = NumValues; i != e; ++i) 1904894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getStreamer().EmitIntValue(FillExpr, FillSize, DEFAULT_ADDRSPACE); 1905894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1906894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1907894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1908894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1909894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveOrg 1910894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= .org expression [ , expression ] 1911894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseDirectiveOrg() { 191219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CheckForValidSection(); 191319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1914894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const MCExpr *Offset; 1915894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseExpression(Offset)) 1916894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1917894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1918894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Parse optional fill expression. 1919894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t FillExpr = 0; 1920894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) { 1921894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::Comma)) 1922894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.org' directive"); 1923894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 192419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1925894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseAbsoluteExpression(FillExpr)) 1926894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1927894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1928894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 1929894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.org' directive"); 1930894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1931894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1932894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1933894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1934894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: Only limited forms of relocatable expressions are accepted here, it 1935894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // has to be relative to the current section. 1936894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getStreamer().EmitValueToOffset(Offset, FillExpr); 1937894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1938894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1939894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1940894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1941894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveAlign 1942894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= {.align, ...} expression [ , expression [ , expression ]] 1943894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseDirectiveAlign(bool IsPow2, unsigned ValueSize) { 194419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CheckForValidSection(); 194519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1946894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc AlignmentLoc = getLexer().getLoc(); 1947894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t Alignment; 1948894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseAbsoluteExpression(Alignment)) 1949894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1950894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1951894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc MaxBytesLoc; 1952894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool HasFillExpr = false; 1953894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t FillExpr = 0; 1954894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t MaxBytesToFill = 0; 1955894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) { 1956894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::Comma)) 1957894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in directive"); 1958894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1959894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1960894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // The fill expression can be omitted while specifying a maximum number of 1961894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // alignment bytes, e.g: 1962894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // .align 3,,4 1963894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::Comma)) { 1964894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman HasFillExpr = true; 1965894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseAbsoluteExpression(FillExpr)) 1966894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1967894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1968894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1969894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) { 1970894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::Comma)) 1971894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in directive"); 1972894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1973894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1974894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MaxBytesLoc = getLexer().getLoc(); 1975894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseAbsoluteExpression(MaxBytesToFill)) 1976894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 197719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1978894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 1979894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in directive"); 1980894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1981894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1982894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1983894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 1984894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1985894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!HasFillExpr) 1986894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman FillExpr = 0; 1987894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1988894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Compute alignment in bytes. 1989894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IsPow2) { 1990894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: Diagnose overflow. 1991894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Alignment >= 32) { 1992894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Error(AlignmentLoc, "invalid alignment value"); 1993894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Alignment = 31; 1994894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1995894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1996894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Alignment = 1ULL << Alignment; 1997894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1998894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1999894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Diagnose non-sensical max bytes to align. 2000894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (MaxBytesLoc.isValid()) { 2001894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (MaxBytesToFill < 1) { 2002894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Error(MaxBytesLoc, "alignment directive can never be satisfied in this " 2003894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "many bytes, ignoring maximum bytes expression"); 2004894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MaxBytesToFill = 0; 2005894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2006894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2007894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (MaxBytesToFill >= Alignment) { 2008894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and " 2009894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "has no effect"); 2010894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MaxBytesToFill = 0; 2011894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2012894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2013894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2014894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Check whether we should use optimal code alignment for this .align 2015894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // directive. 201619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool UseCodeAlign = getStreamer().getCurrentSection()->UseCodeAlign(); 2017894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) && 2018894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ValueSize == 1 && UseCodeAlign) { 2019894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getStreamer().EmitCodeAlignment(Alignment, MaxBytesToFill); 2020894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else { 2021894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: Target specific behavior about how the "extra" bytes are filled. 2022894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getStreamer().EmitValueToAlignment(Alignment, FillExpr, ValueSize, 2023894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MaxBytesToFill); 2024894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2025894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2026894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2027894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2028894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2029894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveSymbolAttribute 2030894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ] 2031894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseDirectiveSymbolAttribute(MCSymbolAttr Attr) { 2032894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) { 2033894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (;;) { 2034894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringRef Name; 203519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc Loc = getTok().getLoc(); 2036894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2037894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseIdentifier(Name)) 203819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return Error(Loc, "expected identifier in directive"); 203919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2040894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCSymbol *Sym = getContext().GetOrCreateSymbol(Name); 2041894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 204219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Assembler local symbols don't make any sense here. Complain loudly. 204319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Sym->isTemporary()) 204419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return Error(Loc, "non-local symbol required in directive"); 204519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2046894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getStreamer().EmitSymbolAttribute(Sym, Attr); 2047894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2048894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().is(AsmToken::EndOfStatement)) 2049894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 2050894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2051894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::Comma)) 2052894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in directive"); 2053894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2054894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2055894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2056894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2057894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2058894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2059894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2060894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2061894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveComm 2062894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ] 2063894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseDirectiveComm(bool IsLocal) { 206419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CheckForValidSection(); 206519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2066894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc IDLoc = getLexer().getLoc(); 2067894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringRef Name; 2068894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseIdentifier(Name)) 2069894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("expected identifier in directive"); 207019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2071894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Handle the identifier as the key symbol. 2072894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCSymbol *Sym = getContext().GetOrCreateSymbol(Name); 2073894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2074894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::Comma)) 2075894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in directive"); 2076894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2077894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2078894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t Size; 2079894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc SizeLoc = getLexer().getLoc(); 2080894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseAbsoluteExpression(Size)) 2081894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 2082894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2083894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t Pow2Alignment = 0; 2084894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc Pow2AlignmentLoc; 2085894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().is(AsmToken::Comma)) { 2086894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2087894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Pow2AlignmentLoc = getLexer().getLoc(); 2088894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseAbsoluteExpression(Pow2Alignment)) 2089894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 209019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2091894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If this target takes alignments in bytes (not log) validate and convert. 2092894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Lexer.getMAI().getAlignmentIsInBytes()) { 2093894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!isPowerOf2_64(Pow2Alignment)) 2094894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return Error(Pow2AlignmentLoc, "alignment must be a power of 2"); 2095894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Pow2Alignment = Log2_64(Pow2Alignment); 2096894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2097894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 209819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2099894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 2100894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.comm' or '.lcomm' directive"); 210119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2102894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2103894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2104894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // NOTE: a size of zero for a .comm should create a undefined symbol 2105894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // but a size of .lcomm creates a bss symbol of size zero. 2106894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Size < 0) 2107894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't " 2108894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "be less than zero"); 2109894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2110894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // NOTE: The alignment in the directive is a power of 2 value, the assembler 2111894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // may internally end up wanting an alignment in bytes. 2112894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: Diagnose overflow. 2113894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Pow2Alignment < 0) 2114894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive " 2115894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "alignment, can't be less than zero"); 2116894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2117894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!Sym->isUndefined()) 2118894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return Error(IDLoc, "invalid symbol redefinition"); 2119894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2120894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // '.lcomm' is equivalent to '.zerofill'. 2121894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Create the Symbol as a common or local common with Size and Pow2Alignment 2122894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (IsLocal) { 2123894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getStreamer().EmitZerofill(Ctx.getMachOSection( 2124894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "__DATA", "__bss", MCSectionMachO::S_ZEROFILL, 2125894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 0, SectionKind::getBSS()), 2126894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Sym, Size, 1 << Pow2Alignment); 2127894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2128894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2129894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2130894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getStreamer().EmitCommonSymbol(Sym, Size, 1 << Pow2Alignment); 2131894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2132894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2133894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2134894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveAbort 2135894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= .abort [... message ...] 2136894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseDirectiveAbort() { 2137894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: Use loc from directive. 2138894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc Loc = getLexer().getLoc(); 2139894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2140894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringRef Str = ParseStringToEndOfStatement(); 2141894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 2142894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.abort' directive"); 2143894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2144894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2145894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2146894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Str.empty()) 2147894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Error(Loc, ".abort detected. Assembly stopping."); 2148894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else 2149894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Error(Loc, ".abort '" + Str + "' detected. Assembly stopping."); 2150894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: Actually abort assembly here. 2151894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2152894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2153894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2154894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2155894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveInclude 2156894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= .include "filename" 2157894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseDirectiveInclude() { 2158894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::String)) 2159894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("expected string in '.include' directive"); 216019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2161894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman std::string Filename = getTok().getString(); 2162894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc IncludeLoc = getLexer().getLoc(); 2163894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2164894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2165894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 2166894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.include' directive"); 216719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2168894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Strip the quotes. 2169894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Filename = Filename.substr(1, Filename.size()-2); 217019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2171894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Attempt to switch the lexer to the included file before consuming the end 2172894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // of statement to avoid losing it when we switch. 2173894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (EnterIncludeFile(Filename)) { 2174894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Error(IncludeLoc, "Could not find include file '" + Filename + "'"); 2175894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 2176894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2177894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2178894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2179894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2180894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2181894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveIf 2182894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= .if expression 2183894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseDirectiveIf(SMLoc DirectiveLoc) { 2184894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondStack.push_back(TheCondState); 2185894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondState.TheCond = AsmCond::IfCond; 2186894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if(TheCondState.Ignore) { 2187894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EatToEndOfStatement(); 2188894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2189894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else { 2190894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t ExprValue; 2191894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseAbsoluteExpression(ExprValue)) 2192894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 2193894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2194894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 2195894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.if' directive"); 219619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2197894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2198894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2199894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondState.CondMet = ExprValue; 2200894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondState.Ignore = !TheCondState.CondMet; 2201894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2202894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2203894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2204894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2205894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 220619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool AsmParser::ParseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) { 220719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman StringRef Name; 220819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman TheCondStack.push_back(TheCondState); 220919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman TheCondState.TheCond = AsmCond::IfCond; 221019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 221119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (TheCondState.Ignore) { 221219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EatToEndOfStatement(); 221319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else { 221419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (ParseIdentifier(Name)) 221519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("expected identifier after '.ifdef'"); 221619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 221719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 221819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 221919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MCSymbol *Sym = getContext().LookupSymbol(Name); 222019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 222119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (expect_defined) 222219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman TheCondState.CondMet = (Sym != NULL && !Sym->isUndefined()); 222319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else 222419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman TheCondState.CondMet = (Sym == NULL || Sym->isUndefined()); 222519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman TheCondState.Ignore = !TheCondState.CondMet; 222619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 222719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 222819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 222919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 223019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2231894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveElseIf 2232894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= .elseif expression 2233894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseDirectiveElseIf(SMLoc DirectiveLoc) { 2234894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TheCondState.TheCond != AsmCond::IfCond && 2235894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondState.TheCond != AsmCond::ElseIfCond) 2236894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Error(DirectiveLoc, "Encountered a .elseif that doesn't follow a .if or " 2237894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman " an .elseif"); 2238894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondState.TheCond = AsmCond::ElseIfCond; 2239894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2240894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool LastIgnoreState = false; 2241894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!TheCondStack.empty()) 2242894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman LastIgnoreState = TheCondStack.back().Ignore; 2243894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (LastIgnoreState || TheCondState.CondMet) { 2244894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondState.Ignore = true; 2245894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EatToEndOfStatement(); 2246894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2247894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else { 2248894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t ExprValue; 2249894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ParseAbsoluteExpression(ExprValue)) 2250894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 2251894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2252894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 2253894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.elseif' directive"); 225419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2255894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2256894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondState.CondMet = ExprValue; 2257894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondState.Ignore = !TheCondState.CondMet; 2258894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2259894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2260894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2261894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2262894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2263894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveElse 2264894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= .else 2265894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseDirectiveElse(SMLoc DirectiveLoc) { 2266894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 2267894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.else' directive"); 226819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2269894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2270894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2271894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TheCondState.TheCond != AsmCond::IfCond && 2272894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondState.TheCond != AsmCond::ElseIfCond) 2273894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Error(DirectiveLoc, "Encountered a .else that doesn't follow a .if or an " 2274894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ".elseif"); 2275894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondState.TheCond = AsmCond::ElseCond; 2276894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool LastIgnoreState = false; 2277894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!TheCondStack.empty()) 2278894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman LastIgnoreState = TheCondStack.back().Ignore; 2279894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (LastIgnoreState || TheCondState.CondMet) 2280894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondState.Ignore = true; 2281894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else 2282894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondState.Ignore = false; 2283894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2284894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2285894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2286894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2287894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveEndIf 2288894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= .endif 2289894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool AsmParser::ParseDirectiveEndIf(SMLoc DirectiveLoc) { 2290894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 2291894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.endif' directive"); 229219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2293894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2294894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2295894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((TheCondState.TheCond == AsmCond::NoCond) || 2296894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondStack.empty()) 2297894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Error(DirectiveLoc, "Encountered a .endif that doesn't follow a .if or " 2298894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ".else"); 2299894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!TheCondStack.empty()) { 2300894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondState = TheCondStack.back(); 2301894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TheCondStack.pop_back(); 2302894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2303894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2304894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2305894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2306894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2307894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveFile 2308894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= .file [number] string 2309894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool GenericAsmParser::ParseDirectiveFile(StringRef, SMLoc DirectiveLoc) { 2310894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: I'm not sure what this is. 2311894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t FileNumber = -1; 2312894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc FileNumberLoc = getLexer().getLoc(); 2313894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().is(AsmToken::Integer)) { 2314894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman FileNumber = getTok().getIntVal(); 2315894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2316894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2317894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (FileNumber < 1) 2318894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("file number less than one"); 2319894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2320894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2321894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::String)) 2322894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.file' directive"); 2323894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2324894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringRef Filename = getTok().getString(); 2325894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Filename = Filename.substr(1, Filename.size()-2); 2326894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2327894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2328894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 2329894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.file' directive"); 2330894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2331894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (FileNumber == -1) 2332894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getStreamer().EmitFileDirective(Filename); 2333894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else { 233419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getStreamer().EmitDwarfFileDirective(FileNumber, Filename)) 233519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Error(FileNumberLoc, "file number already allocated"); 2336894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2337894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2338894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2339894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2340894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2341894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveLine 2342894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= .line [number] 2343894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool GenericAsmParser::ParseDirectiveLine(StringRef, SMLoc DirectiveLoc) { 2344894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) { 2345894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::Integer)) 2346894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.line' directive"); 2347894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2348894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t LineNumber = getTok().getIntVal(); 2349894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman (void) LineNumber; 2350894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2351894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2352894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: Do something with the .line. 2353894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2354894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2355894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 2356894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.line' directive"); 2357894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2358894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2359894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2360894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2361894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2362894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveLoc 236319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end] 236419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// [epilogue_begin] [is_stmt VALUE] [isa VALUE] 236519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// The first number is a file number, must have been previously assigned with 236619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// a .file directive, the second number is the line number and optionally the 236719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// third number is a column position (zero if not specified). The remaining 236819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// optional items are .loc sub-directives. 2369894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool GenericAsmParser::ParseDirectiveLoc(StringRef, SMLoc DirectiveLoc) { 237019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2371894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::Integer)) 2372894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.loc' directive"); 2373894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t FileNumber = getTok().getIntVal(); 237419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (FileNumber < 1) 237519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("file number less than one in '.loc' directive"); 237619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!getContext().isValidDwarfFileNumber(FileNumber)) 237719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("unassigned file number in '.loc' directive"); 2378894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2379894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 238019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t LineNumber = 0; 238119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().is(AsmToken::Integer)) { 238219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman LineNumber = getTok().getIntVal(); 238319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (LineNumber < 1) 238419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("line number less than one in '.loc' directive"); 2385894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 238619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 2387894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 238819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t ColumnPos = 0; 238919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().is(AsmToken::Integer)) { 239019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ColumnPos = getTok().getIntVal(); 239119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (ColumnPos < 0) 239219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("column position less than zero in '.loc' directive"); 239319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 239419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 239519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 239619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned Flags = DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0; 239719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned Isa = 0; 239819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t Discriminator = 0; 239919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) { 240019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman for (;;) { 240119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().is(AsmToken::EndOfStatement)) 240219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 240319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 240419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman StringRef Name; 240519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc Loc = getTok().getLoc(); 240619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getParser().ParseIdentifier(Name)) 2407894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.loc' directive"); 2408894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 240919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Name == "basic_block") 241019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Flags |= DWARF2_FLAG_BASIC_BLOCK; 241119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else if (Name == "prologue_end") 241219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Flags |= DWARF2_FLAG_PROLOGUE_END; 241319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else if (Name == "epilogue_begin") 241419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Flags |= DWARF2_FLAG_EPILOGUE_BEGIN; 241519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else if (Name == "is_stmt") { 241619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc Loc = getTok().getLoc(); 241719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const MCExpr *Value; 241819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getParser().ParseExpression(Value)) 241919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 242019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // The expression must be the constant 0 or 1. 242119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { 242219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int Value = MCE->getValue(); 242319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Value == 0) 242419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Flags &= ~DWARF2_FLAG_IS_STMT; 242519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else if (Value == 1) 242619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Flags |= DWARF2_FLAG_IS_STMT; 242719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else 242819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return Error(Loc, "is_stmt value not 0 or 1"); 242919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 243019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else { 243119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return Error(Loc, "is_stmt value not the constant value of 0 or 1"); 243219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 243319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 243419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else if (Name == "isa") { 243519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc Loc = getTok().getLoc(); 243619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const MCExpr *Value; 243719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getParser().ParseExpression(Value)) 243819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 243919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // The expression must be a constant greater or equal to 0. 244019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) { 244119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int Value = MCE->getValue(); 244219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Value < 0) 244319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return Error(Loc, "isa number less than zero"); 244419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Isa = Value; 244519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 244619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else { 244719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return Error(Loc, "isa number not a constant value"); 244819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 244919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 245019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else if (Name == "discriminator") { 245119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getParser().ParseAbsoluteExpression(Discriminator)) 245219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 245319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 245419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else { 245519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return Error(Loc, "unknown sub-directive in '.loc' directive"); 245619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 2457894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 245819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().is(AsmToken::EndOfStatement)) 245919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 2460894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2461894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2462894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 246319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags, 246419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Isa, Discriminator, StringRef()); 246519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 246619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 246719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 246819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 246919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseDirectiveStabs 247019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .stabs string, number, number, number 247119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool GenericAsmParser::ParseDirectiveStabs(StringRef Directive, 247219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc DirectiveLoc) { 247319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("unsupported directive '" + Directive + "'"); 247419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 247519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 247619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseDirectiveCFISections 247719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .cfi_sections section [, section] 247819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool GenericAsmParser::ParseDirectiveCFISections(StringRef, 247919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc DirectiveLoc) { 248019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman StringRef Name; 248119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool EH = false; 248219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool Debug = false; 248319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 248419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getParser().ParseIdentifier(Name)) 248519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("Expected an identifier"); 248619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 248719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Name == ".eh_frame") 248819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EH = true; 248919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else if (Name == ".debug_frame") 249019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Debug = true; 249119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 249219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().is(AsmToken::Comma)) { 249319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 249419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 249519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getParser().ParseIdentifier(Name)) 249619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("Expected an identifier"); 249719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 249819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Name == ".eh_frame") 249919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EH = true; 250019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else if (Name == ".debug_frame") 250119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Debug = true; 250219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 250319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 250419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitCFISections(EH, Debug); 250519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 250619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 250719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 250819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 250919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseDirectiveCFIStartProc 251019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .cfi_startproc 251119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool GenericAsmParser::ParseDirectiveCFIStartProc(StringRef, 251219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc DirectiveLoc) { 251319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitCFIStartProc(); 251419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 251519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 251619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 251719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseDirectiveCFIEndProc 251819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .cfi_endproc 251919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool GenericAsmParser::ParseDirectiveCFIEndProc(StringRef, SMLoc DirectiveLoc) { 252019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitCFIEndProc(); 252119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 252219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 252319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 252419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseRegisterOrRegisterNumber - parse register name or number. 252519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool GenericAsmParser::ParseRegisterOrRegisterNumber(int64_t &Register, 252619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc DirectiveLoc) { 252719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned RegNo; 252819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 252919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().isNot(AsmToken::Integer)) { 253019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getParser().getTargetParser().ParseRegister(RegNo, DirectiveLoc, 253119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman DirectiveLoc)) 253219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 253319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Register = getContext().getRegisterInfo().getDwarfRegNum(RegNo, true); 253419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else 253519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return getParser().ParseAbsoluteExpression(Register); 253619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 253719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 253819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 253919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 254019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseDirectiveCFIDefCfa 254119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .cfi_def_cfa register, offset 254219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool GenericAsmParser::ParseDirectiveCFIDefCfa(StringRef, 254319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc DirectiveLoc) { 254419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t Register = 0; 254519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc)) 254619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 254719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 254819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().isNot(AsmToken::Comma)) 254919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("unexpected token in directive"); 255019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 255119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 255219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t Offset = 0; 255319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getParser().ParseAbsoluteExpression(Offset)) 255419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 255519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 255619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitCFIDefCfa(Register, Offset); 255719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 255819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 255919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 256019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseDirectiveCFIDefCfaOffset 256119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .cfi_def_cfa_offset offset 256219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool GenericAsmParser::ParseDirectiveCFIDefCfaOffset(StringRef, 256319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc DirectiveLoc) { 256419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t Offset = 0; 256519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getParser().ParseAbsoluteExpression(Offset)) 256619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 256719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 256819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitCFIDefCfaOffset(Offset); 256919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 257019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 257119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 257219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseDirectiveCFIAdjustCfaOffset 257319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .cfi_adjust_cfa_offset adjustment 257419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool GenericAsmParser::ParseDirectiveCFIAdjustCfaOffset(StringRef, 257519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc DirectiveLoc) { 257619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t Adjustment = 0; 257719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getParser().ParseAbsoluteExpression(Adjustment)) 257819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 257919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 258019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitCFIAdjustCfaOffset(Adjustment); 258119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 258219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 258319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 258419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseDirectiveCFIDefCfaRegister 258519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .cfi_def_cfa_register register 258619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool GenericAsmParser::ParseDirectiveCFIDefCfaRegister(StringRef, 258719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc DirectiveLoc) { 258819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t Register = 0; 258919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc)) 259019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 259119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 259219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitCFIDefCfaRegister(Register); 259319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 259419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 259519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 259619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseDirectiveCFIOffset 259719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .cfi_offset register, offset 259819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool GenericAsmParser::ParseDirectiveCFIOffset(StringRef, SMLoc DirectiveLoc) { 259919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t Register = 0; 260019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t Offset = 0; 260119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 260219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc)) 260319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 260419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 260519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().isNot(AsmToken::Comma)) 260619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("unexpected token in directive"); 260719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 260819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 260919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getParser().ParseAbsoluteExpression(Offset)) 261019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 261119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 261219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitCFIOffset(Register, Offset); 261319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 261419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 261519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 261619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseDirectiveCFIRelOffset 261719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .cfi_rel_offset register, offset 261819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool GenericAsmParser::ParseDirectiveCFIRelOffset(StringRef, 261919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc DirectiveLoc) { 262019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t Register = 0; 262119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 262219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc)) 262319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 262419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 262519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().isNot(AsmToken::Comma)) 262619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("unexpected token in directive"); 262719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 262819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 262919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t Offset = 0; 263019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getParser().ParseAbsoluteExpression(Offset)) 263119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 263219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 263319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitCFIRelOffset(Register, Offset); 263419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 263519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 263619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 263719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanstatic bool isValidEncoding(int64_t Encoding) { 263819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Encoding & ~0xff) 263919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 264019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 264119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Encoding == dwarf::DW_EH_PE_omit) 264219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 264319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 264419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const unsigned Format = Encoding & 0xf; 264519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 && 264619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 && 264719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 && 264819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed) 264919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 265019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 265119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const unsigned Application = Encoding & 0x70; 265219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Application != dwarf::DW_EH_PE_absptr && 265319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Application != dwarf::DW_EH_PE_pcrel) 265419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 265519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 265619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 265719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 265819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 265919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseDirectiveCFIPersonalityOrLsda 266019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .cfi_personality encoding, [symbol_name] 266119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .cfi_lsda encoding, [symbol_name] 266219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool GenericAsmParser::ParseDirectiveCFIPersonalityOrLsda(StringRef IDVal, 266319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc DirectiveLoc) { 266419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t Encoding = 0; 266519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getParser().ParseAbsoluteExpression(Encoding)) 266619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 266719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Encoding == dwarf::DW_EH_PE_omit) 266819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 266919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 267019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!isValidEncoding(Encoding)) 267119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("unsupported encoding."); 267219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 267319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().isNot(AsmToken::Comma)) 267419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("unexpected token in directive"); 267519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 267619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 267719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman StringRef Name; 267819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getParser().ParseIdentifier(Name)) 267919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("expected identifier in directive"); 268019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 268119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MCSymbol *Sym = getContext().GetOrCreateSymbol(Name); 268219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 268319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IDVal == ".cfi_personality") 268419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitCFIPersonality(Sym, Encoding); 268519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else { 268619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert(IDVal == ".cfi_lsda"); 268719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitCFILsda(Sym, Encoding); 268819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 268919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 269019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 269119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 269219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseDirectiveCFIRememberState 269319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .cfi_remember_state 269419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool GenericAsmParser::ParseDirectiveCFIRememberState(StringRef IDVal, 269519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc DirectiveLoc) { 269619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitCFIRememberState(); 269719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 269819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 269919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 270019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseDirectiveCFIRestoreState 270119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .cfi_remember_state 270219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool GenericAsmParser::ParseDirectiveCFIRestoreState(StringRef IDVal, 270319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc DirectiveLoc) { 270419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitCFIRestoreState(); 270519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 270619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 270719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 270819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseDirectiveCFISameValue 270919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .cfi_same_value register 271019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool GenericAsmParser::ParseDirectiveCFISameValue(StringRef IDVal, 271119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SMLoc DirectiveLoc) { 271219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int64_t Register = 0; 271319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 271419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc)) 271519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 271619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 271719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitCFISameValue(Register); 2718894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2719894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2720894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2721894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2722894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveMacrosOnOff 2723894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= .macros_on 2724894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= .macros_off 2725894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool GenericAsmParser::ParseDirectiveMacrosOnOff(StringRef Directive, 2726894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc DirectiveLoc) { 2727894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 2728894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return Error(getLexer().getLoc(), 2729894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "unexpected token in '" + Directive + "' directive"); 2730894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2731894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getParser().MacrosEnabled = Directive == ".macros_on"; 2732894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2733894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2734894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2735894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2736894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveMacro 273719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ::= .macro name [parameters] 2738894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool GenericAsmParser::ParseDirectiveMacro(StringRef Directive, 2739894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc DirectiveLoc) { 2740894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringRef Name; 2741894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getParser().ParseIdentifier(Name)) 2742894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("expected identifier in directive"); 2743894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 274419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman std::vector<StringRef> Parameters; 274519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) { 274619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman for(;;) { 274719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman StringRef Parameter; 274819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getParser().ParseIdentifier(Parameter)) 274919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("expected identifier in directive"); 275019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Parameters.push_back(Parameter); 275119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 275219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().isNot(AsmToken::Comma)) 275319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 275419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lex(); 275519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 275619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 275719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2758894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 2759894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '.macro' directive"); 2760894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2761894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Eat the end of statement. 2762894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2763894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2764894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman AsmToken EndToken, StartToken = getTok(); 2765894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2766894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Lex the macro definition. 2767894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (;;) { 2768894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Check whether we have reached the end of the file. 2769894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().is(AsmToken::Eof)) 2770894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return Error(DirectiveLoc, "no matching '.endmacro' in definition"); 2771894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2772894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Otherwise, check whether we have reach the .endmacro. 2773894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().is(AsmToken::Identifier) && 2774894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman (getTok().getIdentifier() == ".endm" || 2775894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getTok().getIdentifier() == ".endmacro")) { 2776894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EndToken = getTok(); 2777894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Lex(); 2778894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 2779894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '" + EndToken.getIdentifier() + 2780894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "' directive"); 2781894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 2782894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2783894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2784894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Otherwise, scan til the end of the statement. 2785894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getParser().EatToEndOfStatement(); 2786894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2787894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2788894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getParser().MacroMap.lookup(Name)) { 2789894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return Error(DirectiveLoc, "macro '" + Name + "' is already defined"); 2790894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2791894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2792894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const char *BodyStart = StartToken.getLoc().getPointer(); 2793894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const char *BodyEnd = EndToken.getLoc().getPointer(); 2794894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart); 279519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getParser().MacroMap[Name] = new Macro(Name, Body, Parameters); 2796894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2797894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2798894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2799894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ParseDirectiveEndMacro 2800894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= .endm 2801894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ::= .endmacro 2802894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool GenericAsmParser::ParseDirectiveEndMacro(StringRef Directive, 2803894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SMLoc DirectiveLoc) { 2804894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 2805894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected token in '" + Directive + "' directive"); 2806894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2807894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If we are inside a macro instantiation, terminate the current 2808894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // instantiation. 2809894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!getParser().ActiveMacros.empty()) { 2810894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getParser().HandleMacroExit(); 2811894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2812894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2813894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2814894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Otherwise, this .endmacro is a stray entry in the file; well formed 2815894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // .endmacro directives are handled during the macro definition parsing. 2816894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TokError("unexpected '" + Directive + "' in file, " 2817894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "no current macro definition"); 2818894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2819894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 282019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool GenericAsmParser::ParseDirectiveLEB128(StringRef DirName, SMLoc) { 282119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getParser().CheckForValidSection(); 282219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 282319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const MCExpr *Value; 282419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 282519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getParser().ParseExpression(Value)) 282619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 282719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 282819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (getLexer().isNot(AsmToken::EndOfStatement)) 282919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TokError("unexpected token in directive"); 283019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 283119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (DirName[1] == 's') 283219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitSLEB128Value(Value); 283319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else 283419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getStreamer().EmitULEB128Value(Value); 283519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 283619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return false; 283719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 283819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 283919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2840894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// \brief Create an MCAsmParser instance. 284119bac1e08be200c31efd26f0f5fd144c9b3eefd3John BaumanMCAsmParser *llvm::createMCAsmParser(SourceMgr &SM, 2842894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MCContext &C, MCStreamer &Out, 2843894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const MCAsmInfo &MAI) { 284419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return new AsmParser(SM, C, Out, MAI); 2845894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2846