forked from OSchip/llvm-project
6142 lines
199 KiB
C++
6142 lines
199 KiB
C++
//===- AsmParser.cpp - Parser for Assembly Files --------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This class implements a parser for assembly files similar to gas syntax.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/APFloat.h"
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#include "llvm/ADT/APInt.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/None.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/BinaryFormat/Dwarf.h"
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#include "llvm/DebugInfo/CodeView/SymbolRecord.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCCodeView.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCDirectives.h"
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#include "llvm/MC/MCDwarf.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCInstPrinter.h"
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#include "llvm/MC/MCInstrDesc.h"
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#include "llvm/MC/MCInstrInfo.h"
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#include "llvm/MC/MCObjectFileInfo.h"
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#include "llvm/MC/MCParser/AsmCond.h"
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#include "llvm/MC/MCParser/AsmLexer.h"
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#include "llvm/MC/MCParser/MCAsmLexer.h"
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#include "llvm/MC/MCParser/MCAsmParser.h"
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#include "llvm/MC/MCParser/MCAsmParserExtension.h"
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#include "llvm/MC/MCParser/MCAsmParserUtils.h"
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#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
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#include "llvm/MC/MCParser/MCTargetAsmParser.h"
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#include "llvm/MC/MCRegisterInfo.h"
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#include "llvm/MC/MCSection.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/MC/MCTargetOptions.h"
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#include "llvm/MC/MCValue.h"
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#include "llvm/Support/Casting.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/MD5.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/SMLoc.h"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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#include <cassert>
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#include <cctype>
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#include <climits>
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#include <cstddef>
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#include <cstdint>
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#include <deque>
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#include <memory>
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#include <sstream>
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#include <string>
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#include <tuple>
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#include <utility>
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#include <vector>
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using namespace llvm;
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MCAsmParserSemaCallback::~MCAsmParserSemaCallback() = default;
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extern cl::opt<unsigned> AsmMacroMaxNestingDepth;
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namespace {
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/// Helper types for tracking macro definitions.
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typedef std::vector<AsmToken> MCAsmMacroArgument;
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typedef std::vector<MCAsmMacroArgument> MCAsmMacroArguments;
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/// Helper class for storing information about an active macro
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/// instantiation.
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struct MacroInstantiation {
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/// The location of the instantiation.
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SMLoc InstantiationLoc;
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/// The buffer where parsing should resume upon instantiation completion.
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unsigned ExitBuffer;
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/// The location where parsing should resume upon instantiation completion.
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SMLoc ExitLoc;
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/// The depth of TheCondStack at the start of the instantiation.
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size_t CondStackDepth;
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};
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struct ParseStatementInfo {
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/// The parsed operands from the last parsed statement.
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SmallVector<std::unique_ptr<MCParsedAsmOperand>, 8> ParsedOperands;
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/// The opcode from the last parsed instruction.
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unsigned Opcode = ~0U;
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/// Was there an error parsing the inline assembly?
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bool ParseError = false;
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SmallVectorImpl<AsmRewrite> *AsmRewrites = nullptr;
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ParseStatementInfo() = delete;
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ParseStatementInfo(SmallVectorImpl<AsmRewrite> *rewrites)
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: AsmRewrites(rewrites) {}
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};
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/// The concrete assembly parser instance.
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class AsmParser : public MCAsmParser {
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private:
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AsmLexer Lexer;
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MCContext &Ctx;
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MCStreamer &Out;
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const MCAsmInfo &MAI;
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SourceMgr &SrcMgr;
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SourceMgr::DiagHandlerTy SavedDiagHandler;
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void *SavedDiagContext;
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std::unique_ptr<MCAsmParserExtension> PlatformParser;
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/// This is the current buffer index we're lexing from as managed by the
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/// SourceMgr object.
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unsigned CurBuffer;
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AsmCond TheCondState;
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std::vector<AsmCond> TheCondStack;
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/// maps directive names to handler methods in parser
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/// extensions. Extensions register themselves in this map by calling
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/// addDirectiveHandler.
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StringMap<ExtensionDirectiveHandler> ExtensionDirectiveMap;
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/// Stack of active macro instantiations.
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std::vector<MacroInstantiation*> ActiveMacros;
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/// List of bodies of anonymous macros.
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std::deque<MCAsmMacro> MacroLikeBodies;
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/// Boolean tracking whether macro substitution is enabled.
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unsigned MacrosEnabledFlag : 1;
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/// Keeps track of how many .macro's have been instantiated.
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unsigned NumOfMacroInstantiations;
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/// The values from the last parsed cpp hash file line comment if any.
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struct CppHashInfoTy {
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StringRef Filename;
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int64_t LineNumber;
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SMLoc Loc;
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unsigned Buf;
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CppHashInfoTy() : Filename(), LineNumber(0), Loc(), Buf(0) {}
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};
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CppHashInfoTy CppHashInfo;
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/// The filename from the first cpp hash file line comment, if any.
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StringRef FirstCppHashFilename;
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/// List of forward directional labels for diagnosis at the end.
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SmallVector<std::tuple<SMLoc, CppHashInfoTy, MCSymbol *>, 4> DirLabels;
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/// AssemblerDialect. ~OU means unset value and use value provided by MAI.
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unsigned AssemblerDialect = ~0U;
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/// is Darwin compatibility enabled?
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bool IsDarwin = false;
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/// Are we parsing ms-style inline assembly?
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bool ParsingMSInlineAsm = false;
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/// Did we already inform the user about inconsistent MD5 usage?
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bool ReportedInconsistentMD5 = false;
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// Is alt macro mode enabled.
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bool AltMacroMode = false;
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public:
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AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
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const MCAsmInfo &MAI, unsigned CB);
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AsmParser(const AsmParser &) = delete;
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AsmParser &operator=(const AsmParser &) = delete;
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~AsmParser() override;
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bool Run(bool NoInitialTextSection, bool NoFinalize = false) override;
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void addDirectiveHandler(StringRef Directive,
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ExtensionDirectiveHandler Handler) override {
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ExtensionDirectiveMap[Directive] = Handler;
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}
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void addAliasForDirective(StringRef Directive, StringRef Alias) override {
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DirectiveKindMap[Directive.lower()] = DirectiveKindMap[Alias.lower()];
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}
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/// @name MCAsmParser Interface
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/// {
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SourceMgr &getSourceManager() override { return SrcMgr; }
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MCAsmLexer &getLexer() override { return Lexer; }
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MCContext &getContext() override { return Ctx; }
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MCStreamer &getStreamer() override { return Out; }
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CodeViewContext &getCVContext() { return Ctx.getCVContext(); }
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unsigned getAssemblerDialect() override {
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if (AssemblerDialect == ~0U)
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return MAI.getAssemblerDialect();
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else
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return AssemblerDialect;
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}
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void setAssemblerDialect(unsigned i) override {
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AssemblerDialect = i;
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}
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void Note(SMLoc L, const Twine &Msg, SMRange Range = None) override;
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bool Warning(SMLoc L, const Twine &Msg, SMRange Range = None) override;
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bool printError(SMLoc L, const Twine &Msg, SMRange Range = None) override;
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const AsmToken &Lex() override;
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void setParsingMSInlineAsm(bool V) override {
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ParsingMSInlineAsm = V;
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// When parsing MS inline asm, we must lex 0b1101 and 0ABCH as binary and
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// hex integer literals.
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Lexer.setLexMasmIntegers(V);
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}
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bool isParsingMSInlineAsm() override { return ParsingMSInlineAsm; }
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bool parseMSInlineAsm(void *AsmLoc, std::string &AsmString,
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unsigned &NumOutputs, unsigned &NumInputs,
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SmallVectorImpl<std::pair<void *,bool>> &OpDecls,
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SmallVectorImpl<std::string> &Constraints,
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SmallVectorImpl<std::string> &Clobbers,
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const MCInstrInfo *MII, const MCInstPrinter *IP,
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MCAsmParserSemaCallback &SI) override;
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bool parseExpression(const MCExpr *&Res);
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bool parseExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
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bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) override;
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bool parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) override;
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bool parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
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SMLoc &EndLoc) override;
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bool parseAbsoluteExpression(int64_t &Res) override;
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/// Parse a floating point expression using the float \p Semantics
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/// and set \p Res to the value.
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bool parseRealValue(const fltSemantics &Semantics, APInt &Res);
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/// Parse an identifier or string (as a quoted identifier)
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/// and set \p Res to the identifier contents.
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bool parseIdentifier(StringRef &Res) override;
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void eatToEndOfStatement() override;
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bool checkForValidSection() override;
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/// }
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private:
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bool parseStatement(ParseStatementInfo &Info,
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MCAsmParserSemaCallback *SI);
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bool parseCurlyBlockScope(SmallVectorImpl<AsmRewrite>& AsmStrRewrites);
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bool parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo = true);
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void checkForBadMacro(SMLoc DirectiveLoc, StringRef Name, StringRef Body,
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ArrayRef<MCAsmMacroParameter> Parameters);
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bool expandMacro(raw_svector_ostream &OS, StringRef Body,
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ArrayRef<MCAsmMacroParameter> Parameters,
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ArrayRef<MCAsmMacroArgument> A, bool EnableAtPseudoVariable,
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SMLoc L);
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/// Are macros enabled in the parser?
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bool areMacrosEnabled() {return MacrosEnabledFlag;}
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/// Control a flag in the parser that enables or disables macros.
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void setMacrosEnabled(bool Flag) {MacrosEnabledFlag = Flag;}
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/// Are we inside a macro instantiation?
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bool isInsideMacroInstantiation() {return !ActiveMacros.empty();}
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/// Handle entry to macro instantiation.
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///
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/// \param M The macro.
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/// \param NameLoc Instantiation location.
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bool handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc);
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/// Handle exit from macro instantiation.
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void handleMacroExit();
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/// Extract AsmTokens for a macro argument.
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bool parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg);
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/// Parse all macro arguments for a given macro.
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bool parseMacroArguments(const MCAsmMacro *M, MCAsmMacroArguments &A);
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void printMacroInstantiations();
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void printMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg,
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SMRange Range = None) const {
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ArrayRef<SMRange> Ranges(Range);
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SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges);
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}
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static void DiagHandler(const SMDiagnostic &Diag, void *Context);
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/// Should we emit DWARF describing this assembler source? (Returns false if
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/// the source has .file directives, which means we don't want to generate
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/// info describing the assembler source itself.)
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bool enabledGenDwarfForAssembly();
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/// Enter the specified file. This returns true on failure.
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bool enterIncludeFile(const std::string &Filename);
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/// Process the specified file for the .incbin directive.
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/// This returns true on failure.
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bool processIncbinFile(const std::string &Filename, int64_t Skip = 0,
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const MCExpr *Count = nullptr, SMLoc Loc = SMLoc());
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/// Reset the current lexer position to that given by \p Loc. The
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/// current token is not set; clients should ensure Lex() is called
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/// subsequently.
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///
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/// \param InBuffer If not 0, should be the known buffer id that contains the
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/// location.
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void jumpToLoc(SMLoc Loc, unsigned InBuffer = 0);
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/// Parse up to the end of statement and a return the contents from the
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/// current token until the end of the statement; the current token on exit
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/// will be either the EndOfStatement or EOF.
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StringRef parseStringToEndOfStatement() override;
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/// Parse until the end of a statement or a comma is encountered,
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/// return the contents from the current token up to the end or comma.
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StringRef parseStringToComma();
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bool parseAssignment(StringRef Name, bool allow_redef,
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bool NoDeadStrip = false);
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unsigned getBinOpPrecedence(AsmToken::TokenKind K,
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MCBinaryExpr::Opcode &Kind);
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bool parseBinOpRHS(unsigned Precedence, const MCExpr *&Res, SMLoc &EndLoc);
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bool parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc);
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bool parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc);
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bool parseRegisterOrRegisterNumber(int64_t &Register, SMLoc DirectiveLoc);
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bool parseCVFunctionId(int64_t &FunctionId, StringRef DirectiveName);
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bool parseCVFileId(int64_t &FileId, StringRef DirectiveName);
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// Generic (target and platform independent) directive parsing.
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enum DirectiveKind {
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DK_NO_DIRECTIVE, // Placeholder
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DK_SET,
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DK_EQU,
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DK_EQUIV,
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DK_ASCII,
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DK_ASCIZ,
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DK_STRING,
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DK_BYTE,
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DK_SHORT,
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DK_RELOC,
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DK_VALUE,
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DK_2BYTE,
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DK_LONG,
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DK_INT,
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DK_4BYTE,
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DK_QUAD,
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DK_8BYTE,
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DK_OCTA,
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DK_DC,
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DK_DC_A,
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DK_DC_B,
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DK_DC_D,
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DK_DC_L,
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DK_DC_S,
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DK_DC_W,
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DK_DC_X,
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DK_DCB,
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DK_DCB_B,
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DK_DCB_D,
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DK_DCB_L,
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DK_DCB_S,
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DK_DCB_W,
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DK_DCB_X,
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DK_DS,
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DK_DS_B,
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DK_DS_D,
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DK_DS_L,
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DK_DS_P,
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DK_DS_S,
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DK_DS_W,
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DK_DS_X,
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DK_SINGLE,
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DK_FLOAT,
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DK_DOUBLE,
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DK_ALIGN,
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DK_ALIGN32,
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DK_BALIGN,
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DK_BALIGNW,
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DK_BALIGNL,
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DK_P2ALIGN,
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DK_P2ALIGNW,
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DK_P2ALIGNL,
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DK_ORG,
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DK_FILL,
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DK_ENDR,
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DK_BUNDLE_ALIGN_MODE,
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DK_BUNDLE_LOCK,
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DK_BUNDLE_UNLOCK,
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DK_ZERO,
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DK_EXTERN,
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DK_GLOBL,
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DK_GLOBAL,
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DK_LAZY_REFERENCE,
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DK_NO_DEAD_STRIP,
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DK_SYMBOL_RESOLVER,
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DK_PRIVATE_EXTERN,
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DK_REFERENCE,
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DK_WEAK_DEFINITION,
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DK_WEAK_REFERENCE,
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DK_WEAK_DEF_CAN_BE_HIDDEN,
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DK_COLD,
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DK_COMM,
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DK_COMMON,
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DK_LCOMM,
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DK_ABORT,
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DK_INCLUDE,
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DK_INCBIN,
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DK_CODE16,
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DK_CODE16GCC,
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DK_REPT,
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DK_IRP,
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DK_IRPC,
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DK_IF,
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DK_IFEQ,
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DK_IFGE,
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DK_IFGT,
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DK_IFLE,
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DK_IFLT,
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DK_IFNE,
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DK_IFB,
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DK_IFNB,
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DK_IFC,
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DK_IFEQS,
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DK_IFNC,
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DK_IFNES,
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DK_IFDEF,
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DK_IFNDEF,
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DK_IFNOTDEF,
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DK_ELSEIF,
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DK_ELSE,
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DK_ENDIF,
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DK_SPACE,
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DK_SKIP,
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DK_FILE,
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DK_LINE,
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DK_LOC,
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DK_STABS,
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DK_CV_FILE,
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DK_CV_FUNC_ID,
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DK_CV_INLINE_SITE_ID,
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DK_CV_LOC,
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DK_CV_LINETABLE,
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DK_CV_INLINE_LINETABLE,
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DK_CV_DEF_RANGE,
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DK_CV_STRINGTABLE,
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DK_CV_STRING,
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DK_CV_FILECHECKSUMS,
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DK_CV_FILECHECKSUM_OFFSET,
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DK_CV_FPO_DATA,
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DK_CFI_SECTIONS,
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DK_CFI_STARTPROC,
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DK_CFI_ENDPROC,
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DK_CFI_DEF_CFA,
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DK_CFI_DEF_CFA_OFFSET,
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DK_CFI_ADJUST_CFA_OFFSET,
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DK_CFI_DEF_CFA_REGISTER,
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DK_CFI_OFFSET,
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DK_CFI_REL_OFFSET,
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DK_CFI_PERSONALITY,
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DK_CFI_LSDA,
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DK_CFI_REMEMBER_STATE,
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DK_CFI_RESTORE_STATE,
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DK_CFI_SAME_VALUE,
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DK_CFI_RESTORE,
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DK_CFI_ESCAPE,
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DK_CFI_RETURN_COLUMN,
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DK_CFI_SIGNAL_FRAME,
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DK_CFI_UNDEFINED,
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DK_CFI_REGISTER,
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DK_CFI_WINDOW_SAVE,
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|
DK_CFI_B_KEY_FRAME,
|
|
DK_MACROS_ON,
|
|
DK_MACROS_OFF,
|
|
DK_ALTMACRO,
|
|
DK_NOALTMACRO,
|
|
DK_MACRO,
|
|
DK_EXITM,
|
|
DK_ENDM,
|
|
DK_ENDMACRO,
|
|
DK_PURGEM,
|
|
DK_SLEB128,
|
|
DK_ULEB128,
|
|
DK_ERR,
|
|
DK_ERROR,
|
|
DK_WARNING,
|
|
DK_PRINT,
|
|
DK_ADDRSIG,
|
|
DK_ADDRSIG_SYM,
|
|
DK_END
|
|
};
|
|
|
|
/// Maps directive name --> DirectiveKind enum, for
|
|
/// directives parsed by this class.
|
|
StringMap<DirectiveKind> DirectiveKindMap;
|
|
|
|
// Codeview def_range type parsing.
|
|
enum CVDefRangeType {
|
|
CVDR_DEFRANGE = 0, // Placeholder
|
|
CVDR_DEFRANGE_REGISTER,
|
|
CVDR_DEFRANGE_FRAMEPOINTER_REL,
|
|
CVDR_DEFRANGE_SUBFIELD_REGISTER,
|
|
CVDR_DEFRANGE_REGISTER_REL
|
|
};
|
|
|
|
/// Maps Codeview def_range types --> CVDefRangeType enum, for
|
|
/// Codeview def_range types parsed by this class.
|
|
StringMap<CVDefRangeType> CVDefRangeTypeMap;
|
|
|
|
// ".ascii", ".asciz", ".string"
|
|
bool parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated);
|
|
bool parseDirectiveReloc(SMLoc DirectiveLoc); // ".reloc"
|
|
bool parseDirectiveValue(StringRef IDVal,
|
|
unsigned Size); // ".byte", ".long", ...
|
|
bool parseDirectiveOctaValue(StringRef IDVal); // ".octa", ...
|
|
bool parseDirectiveRealValue(StringRef IDVal,
|
|
const fltSemantics &); // ".single", ...
|
|
bool parseDirectiveFill(); // ".fill"
|
|
bool parseDirectiveZero(); // ".zero"
|
|
// ".set", ".equ", ".equiv"
|
|
bool parseDirectiveSet(StringRef IDVal, bool allow_redef);
|
|
bool parseDirectiveOrg(); // ".org"
|
|
// ".align{,32}", ".p2align{,w,l}"
|
|
bool parseDirectiveAlign(bool IsPow2, unsigned ValueSize);
|
|
|
|
// ".file", ".line", ".loc", ".stabs"
|
|
bool parseDirectiveFile(SMLoc DirectiveLoc);
|
|
bool parseDirectiveLine();
|
|
bool parseDirectiveLoc();
|
|
bool parseDirectiveStabs();
|
|
|
|
// ".cv_file", ".cv_func_id", ".cv_inline_site_id", ".cv_loc", ".cv_linetable",
|
|
// ".cv_inline_linetable", ".cv_def_range", ".cv_string"
|
|
bool parseDirectiveCVFile();
|
|
bool parseDirectiveCVFuncId();
|
|
bool parseDirectiveCVInlineSiteId();
|
|
bool parseDirectiveCVLoc();
|
|
bool parseDirectiveCVLinetable();
|
|
bool parseDirectiveCVInlineLinetable();
|
|
bool parseDirectiveCVDefRange();
|
|
bool parseDirectiveCVString();
|
|
bool parseDirectiveCVStringTable();
|
|
bool parseDirectiveCVFileChecksums();
|
|
bool parseDirectiveCVFileChecksumOffset();
|
|
bool parseDirectiveCVFPOData();
|
|
|
|
// .cfi directives
|
|
bool parseDirectiveCFIRegister(SMLoc DirectiveLoc);
|
|
bool parseDirectiveCFIWindowSave();
|
|
bool parseDirectiveCFISections();
|
|
bool parseDirectiveCFIStartProc();
|
|
bool parseDirectiveCFIEndProc();
|
|
bool parseDirectiveCFIDefCfaOffset();
|
|
bool parseDirectiveCFIDefCfa(SMLoc DirectiveLoc);
|
|
bool parseDirectiveCFIAdjustCfaOffset();
|
|
bool parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc);
|
|
bool parseDirectiveCFIOffset(SMLoc DirectiveLoc);
|
|
bool parseDirectiveCFIRelOffset(SMLoc DirectiveLoc);
|
|
bool parseDirectiveCFIPersonalityOrLsda(bool IsPersonality);
|
|
bool parseDirectiveCFIRememberState();
|
|
bool parseDirectiveCFIRestoreState();
|
|
bool parseDirectiveCFISameValue(SMLoc DirectiveLoc);
|
|
bool parseDirectiveCFIRestore(SMLoc DirectiveLoc);
|
|
bool parseDirectiveCFIEscape();
|
|
bool parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc);
|
|
bool parseDirectiveCFISignalFrame();
|
|
bool parseDirectiveCFIUndefined(SMLoc DirectiveLoc);
|
|
|
|
// macro directives
|
|
bool parseDirectivePurgeMacro(SMLoc DirectiveLoc);
|
|
bool parseDirectiveExitMacro(StringRef Directive);
|
|
bool parseDirectiveEndMacro(StringRef Directive);
|
|
bool parseDirectiveMacro(SMLoc DirectiveLoc);
|
|
bool parseDirectiveMacrosOnOff(StringRef Directive);
|
|
// alternate macro mode directives
|
|
bool parseDirectiveAltmacro(StringRef Directive);
|
|
// ".bundle_align_mode"
|
|
bool parseDirectiveBundleAlignMode();
|
|
// ".bundle_lock"
|
|
bool parseDirectiveBundleLock();
|
|
// ".bundle_unlock"
|
|
bool parseDirectiveBundleUnlock();
|
|
|
|
// ".space", ".skip"
|
|
bool parseDirectiveSpace(StringRef IDVal);
|
|
|
|
// ".dcb"
|
|
bool parseDirectiveDCB(StringRef IDVal, unsigned Size);
|
|
bool parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &);
|
|
// ".ds"
|
|
bool parseDirectiveDS(StringRef IDVal, unsigned Size);
|
|
|
|
// .sleb128 (Signed=true) and .uleb128 (Signed=false)
|
|
bool parseDirectiveLEB128(bool Signed);
|
|
|
|
/// Parse a directive like ".globl" which
|
|
/// accepts a single symbol (which should be a label or an external).
|
|
bool parseDirectiveSymbolAttribute(MCSymbolAttr Attr);
|
|
|
|
bool parseDirectiveComm(bool IsLocal); // ".comm" and ".lcomm"
|
|
|
|
bool parseDirectiveAbort(); // ".abort"
|
|
bool parseDirectiveInclude(); // ".include"
|
|
bool parseDirectiveIncbin(); // ".incbin"
|
|
|
|
// ".if", ".ifeq", ".ifge", ".ifgt" , ".ifle", ".iflt" or ".ifne"
|
|
bool parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind);
|
|
// ".ifb" or ".ifnb", depending on ExpectBlank.
|
|
bool parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
|
|
// ".ifc" or ".ifnc", depending on ExpectEqual.
|
|
bool parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
|
|
// ".ifeqs" or ".ifnes", depending on ExpectEqual.
|
|
bool parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual);
|
|
// ".ifdef" or ".ifndef", depending on expect_defined
|
|
bool parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
|
|
bool parseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
|
|
bool parseDirectiveElse(SMLoc DirectiveLoc); // ".else"
|
|
bool parseDirectiveEndIf(SMLoc DirectiveLoc); // .endif
|
|
bool parseEscapedString(std::string &Data) override;
|
|
bool parseAngleBracketString(std::string &Data) override;
|
|
|
|
const MCExpr *applyModifierToExpr(const MCExpr *E,
|
|
MCSymbolRefExpr::VariantKind Variant);
|
|
|
|
// Macro-like directives
|
|
MCAsmMacro *parseMacroLikeBody(SMLoc DirectiveLoc);
|
|
void instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
|
|
raw_svector_ostream &OS);
|
|
bool parseDirectiveRept(SMLoc DirectiveLoc, StringRef Directive);
|
|
bool parseDirectiveIrp(SMLoc DirectiveLoc); // ".irp"
|
|
bool parseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc"
|
|
bool parseDirectiveEndr(SMLoc DirectiveLoc); // ".endr"
|
|
|
|
// "_emit" or "__emit"
|
|
bool parseDirectiveMSEmit(SMLoc DirectiveLoc, ParseStatementInfo &Info,
|
|
size_t Len);
|
|
|
|
// "align"
|
|
bool parseDirectiveMSAlign(SMLoc DirectiveLoc, ParseStatementInfo &Info);
|
|
|
|
// "end"
|
|
bool parseDirectiveEnd(SMLoc DirectiveLoc);
|
|
|
|
// ".err" or ".error"
|
|
bool parseDirectiveError(SMLoc DirectiveLoc, bool WithMessage);
|
|
|
|
// ".warning"
|
|
bool parseDirectiveWarning(SMLoc DirectiveLoc);
|
|
|
|
// .print <double-quotes-string>
|
|
bool parseDirectivePrint(SMLoc DirectiveLoc);
|
|
|
|
// Directives to support address-significance tables.
|
|
bool parseDirectiveAddrsig();
|
|
bool parseDirectiveAddrsigSym();
|
|
|
|
void initializeDirectiveKindMap();
|
|
void initializeCVDefRangeTypeMap();
|
|
};
|
|
|
|
} // end anonymous namespace
|
|
|
|
namespace llvm {
|
|
|
|
extern MCAsmParserExtension *createDarwinAsmParser();
|
|
extern MCAsmParserExtension *createELFAsmParser();
|
|
extern MCAsmParserExtension *createCOFFAsmParser();
|
|
extern MCAsmParserExtension *createWasmAsmParser();
|
|
|
|
} // end namespace llvm
|
|
|
|
enum { DEFAULT_ADDRSPACE = 0 };
|
|
|
|
AsmParser::AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
|
|
const MCAsmInfo &MAI, unsigned CB = 0)
|
|
: Lexer(MAI), Ctx(Ctx), Out(Out), MAI(MAI), SrcMgr(SM),
|
|
CurBuffer(CB ? CB : SM.getMainFileID()), MacrosEnabledFlag(true) {
|
|
HadError = false;
|
|
// Save the old handler.
|
|
SavedDiagHandler = SrcMgr.getDiagHandler();
|
|
SavedDiagContext = SrcMgr.getDiagContext();
|
|
// Set our own handler which calls the saved handler.
|
|
SrcMgr.setDiagHandler(DiagHandler, this);
|
|
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
|
|
|
|
// Initialize the platform / file format parser.
|
|
switch (Ctx.getObjectFileInfo()->getObjectFileType()) {
|
|
case MCObjectFileInfo::IsCOFF:
|
|
PlatformParser.reset(createCOFFAsmParser());
|
|
break;
|
|
case MCObjectFileInfo::IsMachO:
|
|
PlatformParser.reset(createDarwinAsmParser());
|
|
IsDarwin = true;
|
|
break;
|
|
case MCObjectFileInfo::IsELF:
|
|
PlatformParser.reset(createELFAsmParser());
|
|
break;
|
|
case MCObjectFileInfo::IsWasm:
|
|
PlatformParser.reset(createWasmAsmParser());
|
|
break;
|
|
case MCObjectFileInfo::IsXCOFF:
|
|
report_fatal_error(
|
|
"Need to implement createXCOFFAsmParser for XCOFF format.");
|
|
break;
|
|
}
|
|
|
|
PlatformParser->Initialize(*this);
|
|
initializeDirectiveKindMap();
|
|
initializeCVDefRangeTypeMap();
|
|
|
|
NumOfMacroInstantiations = 0;
|
|
}
|
|
|
|
AsmParser::~AsmParser() {
|
|
assert((HadError || ActiveMacros.empty()) &&
|
|
"Unexpected active macro instantiation!");
|
|
|
|
// Restore the saved diagnostics handler and context for use during
|
|
// finalization.
|
|
SrcMgr.setDiagHandler(SavedDiagHandler, SavedDiagContext);
|
|
}
|
|
|
|
void AsmParser::printMacroInstantiations() {
|
|
// Print the active macro instantiation stack.
|
|
for (std::vector<MacroInstantiation *>::const_reverse_iterator
|
|
it = ActiveMacros.rbegin(),
|
|
ie = ActiveMacros.rend();
|
|
it != ie; ++it)
|
|
printMessage((*it)->InstantiationLoc, SourceMgr::DK_Note,
|
|
"while in macro instantiation");
|
|
}
|
|
|
|
void AsmParser::Note(SMLoc L, const Twine &Msg, SMRange Range) {
|
|
printPendingErrors();
|
|
printMessage(L, SourceMgr::DK_Note, Msg, Range);
|
|
printMacroInstantiations();
|
|
}
|
|
|
|
bool AsmParser::Warning(SMLoc L, const Twine &Msg, SMRange Range) {
|
|
if(getTargetParser().getTargetOptions().MCNoWarn)
|
|
return false;
|
|
if (getTargetParser().getTargetOptions().MCFatalWarnings)
|
|
return Error(L, Msg, Range);
|
|
printMessage(L, SourceMgr::DK_Warning, Msg, Range);
|
|
printMacroInstantiations();
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::printError(SMLoc L, const Twine &Msg, SMRange Range) {
|
|
HadError = true;
|
|
printMessage(L, SourceMgr::DK_Error, Msg, Range);
|
|
printMacroInstantiations();
|
|
return true;
|
|
}
|
|
|
|
bool AsmParser::enterIncludeFile(const std::string &Filename) {
|
|
std::string IncludedFile;
|
|
unsigned NewBuf =
|
|
SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
|
|
if (!NewBuf)
|
|
return true;
|
|
|
|
CurBuffer = NewBuf;
|
|
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
|
|
return false;
|
|
}
|
|
|
|
/// Process the specified .incbin file by searching for it in the include paths
|
|
/// then just emitting the byte contents of the file to the streamer. This
|
|
/// returns true on failure.
|
|
bool AsmParser::processIncbinFile(const std::string &Filename, int64_t Skip,
|
|
const MCExpr *Count, SMLoc Loc) {
|
|
std::string IncludedFile;
|
|
unsigned NewBuf =
|
|
SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
|
|
if (!NewBuf)
|
|
return true;
|
|
|
|
// Pick up the bytes from the file and emit them.
|
|
StringRef Bytes = SrcMgr.getMemoryBuffer(NewBuf)->getBuffer();
|
|
Bytes = Bytes.drop_front(Skip);
|
|
if (Count) {
|
|
int64_t Res;
|
|
if (!Count->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
|
|
return Error(Loc, "expected absolute expression");
|
|
if (Res < 0)
|
|
return Warning(Loc, "negative count has no effect");
|
|
Bytes = Bytes.take_front(Res);
|
|
}
|
|
getStreamer().emitBytes(Bytes);
|
|
return false;
|
|
}
|
|
|
|
void AsmParser::jumpToLoc(SMLoc Loc, unsigned InBuffer) {
|
|
CurBuffer = InBuffer ? InBuffer : SrcMgr.FindBufferContainingLoc(Loc);
|
|
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer(),
|
|
Loc.getPointer());
|
|
}
|
|
|
|
const AsmToken &AsmParser::Lex() {
|
|
if (Lexer.getTok().is(AsmToken::Error))
|
|
Error(Lexer.getErrLoc(), Lexer.getErr());
|
|
|
|
// if it's a end of statement with a comment in it
|
|
if (getTok().is(AsmToken::EndOfStatement)) {
|
|
// if this is a line comment output it.
|
|
if (!getTok().getString().empty() && getTok().getString().front() != '\n' &&
|
|
getTok().getString().front() != '\r' && MAI.preserveAsmComments())
|
|
Out.addExplicitComment(Twine(getTok().getString()));
|
|
}
|
|
|
|
const AsmToken *tok = &Lexer.Lex();
|
|
|
|
// Parse comments here to be deferred until end of next statement.
|
|
while (tok->is(AsmToken::Comment)) {
|
|
if (MAI.preserveAsmComments())
|
|
Out.addExplicitComment(Twine(tok->getString()));
|
|
tok = &Lexer.Lex();
|
|
}
|
|
|
|
if (tok->is(AsmToken::Eof)) {
|
|
// If this is the end of an included file, pop the parent file off the
|
|
// include stack.
|
|
SMLoc ParentIncludeLoc = SrcMgr.getParentIncludeLoc(CurBuffer);
|
|
if (ParentIncludeLoc != SMLoc()) {
|
|
jumpToLoc(ParentIncludeLoc);
|
|
return Lex();
|
|
}
|
|
}
|
|
|
|
return *tok;
|
|
}
|
|
|
|
bool AsmParser::enabledGenDwarfForAssembly() {
|
|
// Check whether the user specified -g.
|
|
if (!getContext().getGenDwarfForAssembly())
|
|
return false;
|
|
// If we haven't encountered any .file directives (which would imply that
|
|
// the assembler source was produced with debug info already) then emit one
|
|
// describing the assembler source file itself.
|
|
if (getContext().getGenDwarfFileNumber() == 0) {
|
|
// Use the first #line directive for this, if any. It's preprocessed, so
|
|
// there is no checksum, and of course no source directive.
|
|
if (!FirstCppHashFilename.empty())
|
|
getContext().setMCLineTableRootFile(/*CUID=*/0,
|
|
getContext().getCompilationDir(),
|
|
FirstCppHashFilename,
|
|
/*Cksum=*/None, /*Source=*/None);
|
|
const MCDwarfFile &RootFile =
|
|
getContext().getMCDwarfLineTable(/*CUID=*/0).getRootFile();
|
|
getContext().setGenDwarfFileNumber(getStreamer().emitDwarfFileDirective(
|
|
/*CUID=*/0, getContext().getCompilationDir(), RootFile.Name,
|
|
RootFile.Checksum, RootFile.Source));
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool AsmParser::Run(bool NoInitialTextSection, bool NoFinalize) {
|
|
// Create the initial section, if requested.
|
|
if (!NoInitialTextSection)
|
|
Out.InitSections(false);
|
|
|
|
// Prime the lexer.
|
|
Lex();
|
|
|
|
HadError = false;
|
|
AsmCond StartingCondState = TheCondState;
|
|
SmallVector<AsmRewrite, 4> AsmStrRewrites;
|
|
|
|
// If we are generating dwarf for assembly source files save the initial text
|
|
// section. (Don't use enabledGenDwarfForAssembly() here, as we aren't
|
|
// emitting any actual debug info yet and haven't had a chance to parse any
|
|
// embedded .file directives.)
|
|
if (getContext().getGenDwarfForAssembly()) {
|
|
MCSection *Sec = getStreamer().getCurrentSectionOnly();
|
|
if (!Sec->getBeginSymbol()) {
|
|
MCSymbol *SectionStartSym = getContext().createTempSymbol();
|
|
getStreamer().emitLabel(SectionStartSym);
|
|
Sec->setBeginSymbol(SectionStartSym);
|
|
}
|
|
bool InsertResult = getContext().addGenDwarfSection(Sec);
|
|
assert(InsertResult && ".text section should not have debug info yet");
|
|
(void)InsertResult;
|
|
}
|
|
|
|
// While we have input, parse each statement.
|
|
while (Lexer.isNot(AsmToken::Eof)) {
|
|
ParseStatementInfo Info(&AsmStrRewrites);
|
|
bool Parsed = parseStatement(Info, nullptr);
|
|
|
|
// If we have a Lexer Error we are on an Error Token. Load in Lexer Error
|
|
// for printing ErrMsg via Lex() only if no (presumably better) parser error
|
|
// exists.
|
|
if (Parsed && !hasPendingError() && Lexer.getTok().is(AsmToken::Error)) {
|
|
Lex();
|
|
}
|
|
|
|
// parseStatement returned true so may need to emit an error.
|
|
printPendingErrors();
|
|
|
|
// Skipping to the next line if needed.
|
|
if (Parsed && !getLexer().isAtStartOfStatement())
|
|
eatToEndOfStatement();
|
|
}
|
|
|
|
getTargetParser().onEndOfFile();
|
|
printPendingErrors();
|
|
|
|
// All errors should have been emitted.
|
|
assert(!hasPendingError() && "unexpected error from parseStatement");
|
|
|
|
getTargetParser().flushPendingInstructions(getStreamer());
|
|
|
|
if (TheCondState.TheCond != StartingCondState.TheCond ||
|
|
TheCondState.Ignore != StartingCondState.Ignore)
|
|
printError(getTok().getLoc(), "unmatched .ifs or .elses");
|
|
// Check to see there are no empty DwarfFile slots.
|
|
const auto &LineTables = getContext().getMCDwarfLineTables();
|
|
if (!LineTables.empty()) {
|
|
unsigned Index = 0;
|
|
for (const auto &File : LineTables.begin()->second.getMCDwarfFiles()) {
|
|
if (File.Name.empty() && Index != 0)
|
|
printError(getTok().getLoc(), "unassigned file number: " +
|
|
Twine(Index) +
|
|
" for .file directives");
|
|
++Index;
|
|
}
|
|
}
|
|
|
|
// Check to see that all assembler local symbols were actually defined.
|
|
// Targets that don't do subsections via symbols may not want this, though,
|
|
// so conservatively exclude them. Only do this if we're finalizing, though,
|
|
// as otherwise we won't necessarilly have seen everything yet.
|
|
if (!NoFinalize) {
|
|
if (MAI.hasSubsectionsViaSymbols()) {
|
|
for (const auto &TableEntry : getContext().getSymbols()) {
|
|
MCSymbol *Sym = TableEntry.getValue();
|
|
// Variable symbols may not be marked as defined, so check those
|
|
// explicitly. If we know it's a variable, we have a definition for
|
|
// the purposes of this check.
|
|
if (Sym->isTemporary() && !Sym->isVariable() && !Sym->isDefined())
|
|
// FIXME: We would really like to refer back to where the symbol was
|
|
// first referenced for a source location. We need to add something
|
|
// to track that. Currently, we just point to the end of the file.
|
|
printError(getTok().getLoc(), "assembler local symbol '" +
|
|
Sym->getName() + "' not defined");
|
|
}
|
|
}
|
|
|
|
// Temporary symbols like the ones for directional jumps don't go in the
|
|
// symbol table. They also need to be diagnosed in all (final) cases.
|
|
for (std::tuple<SMLoc, CppHashInfoTy, MCSymbol *> &LocSym : DirLabels) {
|
|
if (std::get<2>(LocSym)->isUndefined()) {
|
|
// Reset the state of any "# line file" directives we've seen to the
|
|
// context as it was at the diagnostic site.
|
|
CppHashInfo = std::get<1>(LocSym);
|
|
printError(std::get<0>(LocSym), "directional label undefined");
|
|
}
|
|
}
|
|
}
|
|
|
|
// Finalize the output stream if there are no errors and if the client wants
|
|
// us to.
|
|
if (!HadError && !NoFinalize)
|
|
Out.Finish();
|
|
|
|
return HadError || getContext().hadError();
|
|
}
|
|
|
|
bool AsmParser::checkForValidSection() {
|
|
if (!ParsingMSInlineAsm && !getStreamer().getCurrentSectionOnly()) {
|
|
Out.InitSections(false);
|
|
return Error(getTok().getLoc(),
|
|
"expected section directive before assembly directive");
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// Throw away the rest of the line for testing purposes.
|
|
void AsmParser::eatToEndOfStatement() {
|
|
while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
|
|
Lexer.Lex();
|
|
|
|
// Eat EOL.
|
|
if (Lexer.is(AsmToken::EndOfStatement))
|
|
Lexer.Lex();
|
|
}
|
|
|
|
StringRef AsmParser::parseStringToEndOfStatement() {
|
|
const char *Start = getTok().getLoc().getPointer();
|
|
|
|
while (Lexer.isNot(AsmToken::EndOfStatement) && Lexer.isNot(AsmToken::Eof))
|
|
Lexer.Lex();
|
|
|
|
const char *End = getTok().getLoc().getPointer();
|
|
return StringRef(Start, End - Start);
|
|
}
|
|
|
|
StringRef AsmParser::parseStringToComma() {
|
|
const char *Start = getTok().getLoc().getPointer();
|
|
|
|
while (Lexer.isNot(AsmToken::EndOfStatement) &&
|
|
Lexer.isNot(AsmToken::Comma) && Lexer.isNot(AsmToken::Eof))
|
|
Lexer.Lex();
|
|
|
|
const char *End = getTok().getLoc().getPointer();
|
|
return StringRef(Start, End - Start);
|
|
}
|
|
|
|
/// Parse a paren expression and return it.
|
|
/// NOTE: This assumes the leading '(' has already been consumed.
|
|
///
|
|
/// parenexpr ::= expr)
|
|
///
|
|
bool AsmParser::parseParenExpr(const MCExpr *&Res, SMLoc &EndLoc) {
|
|
if (parseExpression(Res))
|
|
return true;
|
|
if (Lexer.isNot(AsmToken::RParen))
|
|
return TokError("expected ')' in parentheses expression");
|
|
EndLoc = Lexer.getTok().getEndLoc();
|
|
Lex();
|
|
return false;
|
|
}
|
|
|
|
/// Parse a bracket expression and return it.
|
|
/// NOTE: This assumes the leading '[' has already been consumed.
|
|
///
|
|
/// bracketexpr ::= expr]
|
|
///
|
|
bool AsmParser::parseBracketExpr(const MCExpr *&Res, SMLoc &EndLoc) {
|
|
if (parseExpression(Res))
|
|
return true;
|
|
EndLoc = getTok().getEndLoc();
|
|
if (parseToken(AsmToken::RBrac, "expected ']' in brackets expression"))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
/// Parse a primary expression and return it.
|
|
/// primaryexpr ::= (parenexpr
|
|
/// primaryexpr ::= symbol
|
|
/// primaryexpr ::= number
|
|
/// primaryexpr ::= '.'
|
|
/// primaryexpr ::= ~,+,- primaryexpr
|
|
bool AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) {
|
|
SMLoc FirstTokenLoc = getLexer().getLoc();
|
|
AsmToken::TokenKind FirstTokenKind = Lexer.getKind();
|
|
switch (FirstTokenKind) {
|
|
default:
|
|
return TokError("unknown token in expression");
|
|
// If we have an error assume that we've already handled it.
|
|
case AsmToken::Error:
|
|
return true;
|
|
case AsmToken::Exclaim:
|
|
Lex(); // Eat the operator.
|
|
if (parsePrimaryExpr(Res, EndLoc))
|
|
return true;
|
|
Res = MCUnaryExpr::createLNot(Res, getContext(), FirstTokenLoc);
|
|
return false;
|
|
case AsmToken::Dollar:
|
|
case AsmToken::At:
|
|
case AsmToken::String:
|
|
case AsmToken::Identifier: {
|
|
StringRef Identifier;
|
|
if (parseIdentifier(Identifier)) {
|
|
// We may have failed but $ may be a valid token.
|
|
if (getTok().is(AsmToken::Dollar)) {
|
|
if (Lexer.getMAI().getDollarIsPC()) {
|
|
Lex();
|
|
// This is a '$' reference, which references the current PC. Emit a
|
|
// temporary label to the streamer and refer to it.
|
|
MCSymbol *Sym = Ctx.createTempSymbol();
|
|
Out.emitLabel(Sym);
|
|
Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None,
|
|
getContext());
|
|
EndLoc = FirstTokenLoc;
|
|
return false;
|
|
}
|
|
return Error(FirstTokenLoc, "invalid token in expression");
|
|
}
|
|
}
|
|
// Parse symbol variant
|
|
std::pair<StringRef, StringRef> Split;
|
|
if (!MAI.useParensForSymbolVariant()) {
|
|
if (FirstTokenKind == AsmToken::String) {
|
|
if (Lexer.is(AsmToken::At)) {
|
|
Lex(); // eat @
|
|
SMLoc AtLoc = getLexer().getLoc();
|
|
StringRef VName;
|
|
if (parseIdentifier(VName))
|
|
return Error(AtLoc, "expected symbol variant after '@'");
|
|
|
|
Split = std::make_pair(Identifier, VName);
|
|
}
|
|
} else {
|
|
Split = Identifier.split('@');
|
|
}
|
|
} else if (Lexer.is(AsmToken::LParen)) {
|
|
Lex(); // eat '('.
|
|
StringRef VName;
|
|
parseIdentifier(VName);
|
|
// eat ')'.
|
|
if (parseToken(AsmToken::RParen,
|
|
"unexpected token in variant, expected ')'"))
|
|
return true;
|
|
Split = std::make_pair(Identifier, VName);
|
|
}
|
|
|
|
EndLoc = SMLoc::getFromPointer(Identifier.end());
|
|
|
|
// This is a symbol reference.
|
|
StringRef SymbolName = Identifier;
|
|
if (SymbolName.empty())
|
|
return Error(getLexer().getLoc(), "expected a symbol reference");
|
|
|
|
MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
|
|
|
|
// Lookup the symbol variant if used.
|
|
if (!Split.second.empty()) {
|
|
Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
|
|
if (Variant != MCSymbolRefExpr::VK_Invalid) {
|
|
SymbolName = Split.first;
|
|
} else if (MAI.doesAllowAtInName() && !MAI.useParensForSymbolVariant()) {
|
|
Variant = MCSymbolRefExpr::VK_None;
|
|
} else {
|
|
return Error(SMLoc::getFromPointer(Split.second.begin()),
|
|
"invalid variant '" + Split.second + "'");
|
|
}
|
|
}
|
|
|
|
MCSymbol *Sym = getContext().getInlineAsmLabel(SymbolName);
|
|
if (!Sym)
|
|
Sym = getContext().getOrCreateSymbol(SymbolName);
|
|
|
|
// If this is an absolute variable reference, substitute it now to preserve
|
|
// semantics in the face of reassignment.
|
|
if (Sym->isVariable()) {
|
|
auto V = Sym->getVariableValue(/*SetUsed*/ false);
|
|
bool DoInline = isa<MCConstantExpr>(V) && !Variant;
|
|
if (auto TV = dyn_cast<MCTargetExpr>(V))
|
|
DoInline = TV->inlineAssignedExpr();
|
|
if (DoInline) {
|
|
if (Variant)
|
|
return Error(EndLoc, "unexpected modifier on variable reference");
|
|
Res = Sym->getVariableValue(/*SetUsed*/ false);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Otherwise create a symbol ref.
|
|
Res = MCSymbolRefExpr::create(Sym, Variant, getContext(), FirstTokenLoc);
|
|
return false;
|
|
}
|
|
case AsmToken::BigNum:
|
|
return TokError("literal value out of range for directive");
|
|
case AsmToken::Integer: {
|
|
SMLoc Loc = getTok().getLoc();
|
|
int64_t IntVal = getTok().getIntVal();
|
|
Res = MCConstantExpr::create(IntVal, getContext());
|
|
EndLoc = Lexer.getTok().getEndLoc();
|
|
Lex(); // Eat token.
|
|
// Look for 'b' or 'f' following an Integer as a directional label
|
|
if (Lexer.getKind() == AsmToken::Identifier) {
|
|
StringRef IDVal = getTok().getString();
|
|
// Lookup the symbol variant if used.
|
|
std::pair<StringRef, StringRef> Split = IDVal.split('@');
|
|
MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
|
|
if (Split.first.size() != IDVal.size()) {
|
|
Variant = MCSymbolRefExpr::getVariantKindForName(Split.second);
|
|
if (Variant == MCSymbolRefExpr::VK_Invalid)
|
|
return TokError("invalid variant '" + Split.second + "'");
|
|
IDVal = Split.first;
|
|
}
|
|
if (IDVal == "f" || IDVal == "b") {
|
|
MCSymbol *Sym =
|
|
Ctx.getDirectionalLocalSymbol(IntVal, IDVal == "b");
|
|
Res = MCSymbolRefExpr::create(Sym, Variant, getContext());
|
|
if (IDVal == "b" && Sym->isUndefined())
|
|
return Error(Loc, "directional label undefined");
|
|
DirLabels.push_back(std::make_tuple(Loc, CppHashInfo, Sym));
|
|
EndLoc = Lexer.getTok().getEndLoc();
|
|
Lex(); // Eat identifier.
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
case AsmToken::Real: {
|
|
APFloat RealVal(APFloat::IEEEdouble(), getTok().getString());
|
|
uint64_t IntVal = RealVal.bitcastToAPInt().getZExtValue();
|
|
Res = MCConstantExpr::create(IntVal, getContext());
|
|
EndLoc = Lexer.getTok().getEndLoc();
|
|
Lex(); // Eat token.
|
|
return false;
|
|
}
|
|
case AsmToken::Dot: {
|
|
// This is a '.' reference, which references the current PC. Emit a
|
|
// temporary label to the streamer and refer to it.
|
|
MCSymbol *Sym = Ctx.createTempSymbol();
|
|
Out.emitLabel(Sym);
|
|
Res = MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, getContext());
|
|
EndLoc = Lexer.getTok().getEndLoc();
|
|
Lex(); // Eat identifier.
|
|
return false;
|
|
}
|
|
case AsmToken::LParen:
|
|
Lex(); // Eat the '('.
|
|
return parseParenExpr(Res, EndLoc);
|
|
case AsmToken::LBrac:
|
|
if (!PlatformParser->HasBracketExpressions())
|
|
return TokError("brackets expression not supported on this target");
|
|
Lex(); // Eat the '['.
|
|
return parseBracketExpr(Res, EndLoc);
|
|
case AsmToken::Minus:
|
|
Lex(); // Eat the operator.
|
|
if (parsePrimaryExpr(Res, EndLoc))
|
|
return true;
|
|
Res = MCUnaryExpr::createMinus(Res, getContext(), FirstTokenLoc);
|
|
return false;
|
|
case AsmToken::Plus:
|
|
Lex(); // Eat the operator.
|
|
if (parsePrimaryExpr(Res, EndLoc))
|
|
return true;
|
|
Res = MCUnaryExpr::createPlus(Res, getContext(), FirstTokenLoc);
|
|
return false;
|
|
case AsmToken::Tilde:
|
|
Lex(); // Eat the operator.
|
|
if (parsePrimaryExpr(Res, EndLoc))
|
|
return true;
|
|
Res = MCUnaryExpr::createNot(Res, getContext(), FirstTokenLoc);
|
|
return false;
|
|
// MIPS unary expression operators. The lexer won't generate these tokens if
|
|
// MCAsmInfo::HasMipsExpressions is false for the target.
|
|
case AsmToken::PercentCall16:
|
|
case AsmToken::PercentCall_Hi:
|
|
case AsmToken::PercentCall_Lo:
|
|
case AsmToken::PercentDtprel_Hi:
|
|
case AsmToken::PercentDtprel_Lo:
|
|
case AsmToken::PercentGot:
|
|
case AsmToken::PercentGot_Disp:
|
|
case AsmToken::PercentGot_Hi:
|
|
case AsmToken::PercentGot_Lo:
|
|
case AsmToken::PercentGot_Ofst:
|
|
case AsmToken::PercentGot_Page:
|
|
case AsmToken::PercentGottprel:
|
|
case AsmToken::PercentGp_Rel:
|
|
case AsmToken::PercentHi:
|
|
case AsmToken::PercentHigher:
|
|
case AsmToken::PercentHighest:
|
|
case AsmToken::PercentLo:
|
|
case AsmToken::PercentNeg:
|
|
case AsmToken::PercentPcrel_Hi:
|
|
case AsmToken::PercentPcrel_Lo:
|
|
case AsmToken::PercentTlsgd:
|
|
case AsmToken::PercentTlsldm:
|
|
case AsmToken::PercentTprel_Hi:
|
|
case AsmToken::PercentTprel_Lo:
|
|
Lex(); // Eat the operator.
|
|
if (Lexer.isNot(AsmToken::LParen))
|
|
return TokError("expected '(' after operator");
|
|
Lex(); // Eat the operator.
|
|
if (parseExpression(Res, EndLoc))
|
|
return true;
|
|
if (Lexer.isNot(AsmToken::RParen))
|
|
return TokError("expected ')'");
|
|
Lex(); // Eat the operator.
|
|
Res = getTargetParser().createTargetUnaryExpr(Res, FirstTokenKind, Ctx);
|
|
return !Res;
|
|
}
|
|
}
|
|
|
|
bool AsmParser::parseExpression(const MCExpr *&Res) {
|
|
SMLoc EndLoc;
|
|
return parseExpression(Res, EndLoc);
|
|
}
|
|
|
|
const MCExpr *
|
|
AsmParser::applyModifierToExpr(const MCExpr *E,
|
|
MCSymbolRefExpr::VariantKind Variant) {
|
|
// Ask the target implementation about this expression first.
|
|
const MCExpr *NewE = getTargetParser().applyModifierToExpr(E, Variant, Ctx);
|
|
if (NewE)
|
|
return NewE;
|
|
// Recurse over the given expression, rebuilding it to apply the given variant
|
|
// if there is exactly one symbol.
|
|
switch (E->getKind()) {
|
|
case MCExpr::Target:
|
|
case MCExpr::Constant:
|
|
return nullptr;
|
|
|
|
case MCExpr::SymbolRef: {
|
|
const MCSymbolRefExpr *SRE = cast<MCSymbolRefExpr>(E);
|
|
|
|
if (SRE->getKind() != MCSymbolRefExpr::VK_None) {
|
|
TokError("invalid variant on expression '" + getTok().getIdentifier() +
|
|
"' (already modified)");
|
|
return E;
|
|
}
|
|
|
|
return MCSymbolRefExpr::create(&SRE->getSymbol(), Variant, getContext());
|
|
}
|
|
|
|
case MCExpr::Unary: {
|
|
const MCUnaryExpr *UE = cast<MCUnaryExpr>(E);
|
|
const MCExpr *Sub = applyModifierToExpr(UE->getSubExpr(), Variant);
|
|
if (!Sub)
|
|
return nullptr;
|
|
return MCUnaryExpr::create(UE->getOpcode(), Sub, getContext());
|
|
}
|
|
|
|
case MCExpr::Binary: {
|
|
const MCBinaryExpr *BE = cast<MCBinaryExpr>(E);
|
|
const MCExpr *LHS = applyModifierToExpr(BE->getLHS(), Variant);
|
|
const MCExpr *RHS = applyModifierToExpr(BE->getRHS(), Variant);
|
|
|
|
if (!LHS && !RHS)
|
|
return nullptr;
|
|
|
|
if (!LHS)
|
|
LHS = BE->getLHS();
|
|
if (!RHS)
|
|
RHS = BE->getRHS();
|
|
|
|
return MCBinaryExpr::create(BE->getOpcode(), LHS, RHS, getContext());
|
|
}
|
|
}
|
|
|
|
llvm_unreachable("Invalid expression kind!");
|
|
}
|
|
|
|
/// This function checks if the next token is <string> type or arithmetic.
|
|
/// string that begin with character '<' must end with character '>'.
|
|
/// otherwise it is arithmetics.
|
|
/// If the function returns a 'true' value,
|
|
/// the End argument will be filled with the last location pointed to the '>'
|
|
/// character.
|
|
|
|
/// There is a gap between the AltMacro's documentation and the single quote
|
|
/// implementation. GCC does not fully support this feature and so we will not
|
|
/// support it.
|
|
/// TODO: Adding single quote as a string.
|
|
static bool isAngleBracketString(SMLoc &StrLoc, SMLoc &EndLoc) {
|
|
assert((StrLoc.getPointer() != nullptr) &&
|
|
"Argument to the function cannot be a NULL value");
|
|
const char *CharPtr = StrLoc.getPointer();
|
|
while ((*CharPtr != '>') && (*CharPtr != '\n') && (*CharPtr != '\r') &&
|
|
(*CharPtr != '\0')) {
|
|
if (*CharPtr == '!')
|
|
CharPtr++;
|
|
CharPtr++;
|
|
}
|
|
if (*CharPtr == '>') {
|
|
EndLoc = StrLoc.getFromPointer(CharPtr + 1);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// creating a string without the escape characters '!'.
|
|
static std::string angleBracketString(StringRef AltMacroStr) {
|
|
std::string Res;
|
|
for (size_t Pos = 0; Pos < AltMacroStr.size(); Pos++) {
|
|
if (AltMacroStr[Pos] == '!')
|
|
Pos++;
|
|
Res += AltMacroStr[Pos];
|
|
}
|
|
return Res;
|
|
}
|
|
|
|
/// Parse an expression and return it.
|
|
///
|
|
/// expr ::= expr &&,|| expr -> lowest.
|
|
/// expr ::= expr |,^,&,! expr
|
|
/// expr ::= expr ==,!=,<>,<,<=,>,>= expr
|
|
/// expr ::= expr <<,>> expr
|
|
/// expr ::= expr +,- expr
|
|
/// expr ::= expr *,/,% expr -> highest.
|
|
/// expr ::= primaryexpr
|
|
///
|
|
bool AsmParser::parseExpression(const MCExpr *&Res, SMLoc &EndLoc) {
|
|
// Parse the expression.
|
|
Res = nullptr;
|
|
if (getTargetParser().parsePrimaryExpr(Res, EndLoc) ||
|
|
parseBinOpRHS(1, Res, EndLoc))
|
|
return true;
|
|
|
|
// As a special case, we support 'a op b @ modifier' by rewriting the
|
|
// expression to include the modifier. This is inefficient, but in general we
|
|
// expect users to use 'a@modifier op b'.
|
|
if (Lexer.getKind() == AsmToken::At) {
|
|
Lex();
|
|
|
|
if (Lexer.isNot(AsmToken::Identifier))
|
|
return TokError("unexpected symbol modifier following '@'");
|
|
|
|
MCSymbolRefExpr::VariantKind Variant =
|
|
MCSymbolRefExpr::getVariantKindForName(getTok().getIdentifier());
|
|
if (Variant == MCSymbolRefExpr::VK_Invalid)
|
|
return TokError("invalid variant '" + getTok().getIdentifier() + "'");
|
|
|
|
const MCExpr *ModifiedRes = applyModifierToExpr(Res, Variant);
|
|
if (!ModifiedRes) {
|
|
return TokError("invalid modifier '" + getTok().getIdentifier() +
|
|
"' (no symbols present)");
|
|
}
|
|
|
|
Res = ModifiedRes;
|
|
Lex();
|
|
}
|
|
|
|
// Try to constant fold it up front, if possible. Do not exploit
|
|
// assembler here.
|
|
int64_t Value;
|
|
if (Res->evaluateAsAbsolute(Value))
|
|
Res = MCConstantExpr::create(Value, getContext());
|
|
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::parseParenExpression(const MCExpr *&Res, SMLoc &EndLoc) {
|
|
Res = nullptr;
|
|
return parseParenExpr(Res, EndLoc) || parseBinOpRHS(1, Res, EndLoc);
|
|
}
|
|
|
|
bool AsmParser::parseParenExprOfDepth(unsigned ParenDepth, const MCExpr *&Res,
|
|
SMLoc &EndLoc) {
|
|
if (parseParenExpr(Res, EndLoc))
|
|
return true;
|
|
|
|
for (; ParenDepth > 0; --ParenDepth) {
|
|
if (parseBinOpRHS(1, Res, EndLoc))
|
|
return true;
|
|
|
|
// We don't Lex() the last RParen.
|
|
// This is the same behavior as parseParenExpression().
|
|
if (ParenDepth - 1 > 0) {
|
|
EndLoc = getTok().getEndLoc();
|
|
if (parseToken(AsmToken::RParen,
|
|
"expected ')' in parentheses expression"))
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::parseAbsoluteExpression(int64_t &Res) {
|
|
const MCExpr *Expr;
|
|
|
|
SMLoc StartLoc = Lexer.getLoc();
|
|
if (parseExpression(Expr))
|
|
return true;
|
|
|
|
if (!Expr->evaluateAsAbsolute(Res, getStreamer().getAssemblerPtr()))
|
|
return Error(StartLoc, "expected absolute expression");
|
|
|
|
return false;
|
|
}
|
|
|
|
static unsigned getDarwinBinOpPrecedence(AsmToken::TokenKind K,
|
|
MCBinaryExpr::Opcode &Kind,
|
|
bool ShouldUseLogicalShr) {
|
|
switch (K) {
|
|
default:
|
|
return 0; // not a binop.
|
|
|
|
// Lowest Precedence: &&, ||
|
|
case AsmToken::AmpAmp:
|
|
Kind = MCBinaryExpr::LAnd;
|
|
return 1;
|
|
case AsmToken::PipePipe:
|
|
Kind = MCBinaryExpr::LOr;
|
|
return 1;
|
|
|
|
// Low Precedence: |, &, ^
|
|
//
|
|
// FIXME: gas seems to support '!' as an infix operator?
|
|
case AsmToken::Pipe:
|
|
Kind = MCBinaryExpr::Or;
|
|
return 2;
|
|
case AsmToken::Caret:
|
|
Kind = MCBinaryExpr::Xor;
|
|
return 2;
|
|
case AsmToken::Amp:
|
|
Kind = MCBinaryExpr::And;
|
|
return 2;
|
|
|
|
// Low Intermediate Precedence: ==, !=, <>, <, <=, >, >=
|
|
case AsmToken::EqualEqual:
|
|
Kind = MCBinaryExpr::EQ;
|
|
return 3;
|
|
case AsmToken::ExclaimEqual:
|
|
case AsmToken::LessGreater:
|
|
Kind = MCBinaryExpr::NE;
|
|
return 3;
|
|
case AsmToken::Less:
|
|
Kind = MCBinaryExpr::LT;
|
|
return 3;
|
|
case AsmToken::LessEqual:
|
|
Kind = MCBinaryExpr::LTE;
|
|
return 3;
|
|
case AsmToken::Greater:
|
|
Kind = MCBinaryExpr::GT;
|
|
return 3;
|
|
case AsmToken::GreaterEqual:
|
|
Kind = MCBinaryExpr::GTE;
|
|
return 3;
|
|
|
|
// Intermediate Precedence: <<, >>
|
|
case AsmToken::LessLess:
|
|
Kind = MCBinaryExpr::Shl;
|
|
return 4;
|
|
case AsmToken::GreaterGreater:
|
|
Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
|
|
return 4;
|
|
|
|
// High Intermediate Precedence: +, -
|
|
case AsmToken::Plus:
|
|
Kind = MCBinaryExpr::Add;
|
|
return 5;
|
|
case AsmToken::Minus:
|
|
Kind = MCBinaryExpr::Sub;
|
|
return 5;
|
|
|
|
// Highest Precedence: *, /, %
|
|
case AsmToken::Star:
|
|
Kind = MCBinaryExpr::Mul;
|
|
return 6;
|
|
case AsmToken::Slash:
|
|
Kind = MCBinaryExpr::Div;
|
|
return 6;
|
|
case AsmToken::Percent:
|
|
Kind = MCBinaryExpr::Mod;
|
|
return 6;
|
|
}
|
|
}
|
|
|
|
static unsigned getGNUBinOpPrecedence(AsmToken::TokenKind K,
|
|
MCBinaryExpr::Opcode &Kind,
|
|
bool ShouldUseLogicalShr) {
|
|
switch (K) {
|
|
default:
|
|
return 0; // not a binop.
|
|
|
|
// Lowest Precedence: &&, ||
|
|
case AsmToken::AmpAmp:
|
|
Kind = MCBinaryExpr::LAnd;
|
|
return 2;
|
|
case AsmToken::PipePipe:
|
|
Kind = MCBinaryExpr::LOr;
|
|
return 1;
|
|
|
|
// Low Precedence: ==, !=, <>, <, <=, >, >=
|
|
case AsmToken::EqualEqual:
|
|
Kind = MCBinaryExpr::EQ;
|
|
return 3;
|
|
case AsmToken::ExclaimEqual:
|
|
case AsmToken::LessGreater:
|
|
Kind = MCBinaryExpr::NE;
|
|
return 3;
|
|
case AsmToken::Less:
|
|
Kind = MCBinaryExpr::LT;
|
|
return 3;
|
|
case AsmToken::LessEqual:
|
|
Kind = MCBinaryExpr::LTE;
|
|
return 3;
|
|
case AsmToken::Greater:
|
|
Kind = MCBinaryExpr::GT;
|
|
return 3;
|
|
case AsmToken::GreaterEqual:
|
|
Kind = MCBinaryExpr::GTE;
|
|
return 3;
|
|
|
|
// Low Intermediate Precedence: +, -
|
|
case AsmToken::Plus:
|
|
Kind = MCBinaryExpr::Add;
|
|
return 4;
|
|
case AsmToken::Minus:
|
|
Kind = MCBinaryExpr::Sub;
|
|
return 4;
|
|
|
|
// High Intermediate Precedence: |, &, ^
|
|
//
|
|
// FIXME: gas seems to support '!' as an infix operator?
|
|
case AsmToken::Pipe:
|
|
Kind = MCBinaryExpr::Or;
|
|
return 5;
|
|
case AsmToken::Caret:
|
|
Kind = MCBinaryExpr::Xor;
|
|
return 5;
|
|
case AsmToken::Amp:
|
|
Kind = MCBinaryExpr::And;
|
|
return 5;
|
|
|
|
// Highest Precedence: *, /, %, <<, >>
|
|
case AsmToken::Star:
|
|
Kind = MCBinaryExpr::Mul;
|
|
return 6;
|
|
case AsmToken::Slash:
|
|
Kind = MCBinaryExpr::Div;
|
|
return 6;
|
|
case AsmToken::Percent:
|
|
Kind = MCBinaryExpr::Mod;
|
|
return 6;
|
|
case AsmToken::LessLess:
|
|
Kind = MCBinaryExpr::Shl;
|
|
return 6;
|
|
case AsmToken::GreaterGreater:
|
|
Kind = ShouldUseLogicalShr ? MCBinaryExpr::LShr : MCBinaryExpr::AShr;
|
|
return 6;
|
|
}
|
|
}
|
|
|
|
unsigned AsmParser::getBinOpPrecedence(AsmToken::TokenKind K,
|
|
MCBinaryExpr::Opcode &Kind) {
|
|
bool ShouldUseLogicalShr = MAI.shouldUseLogicalShr();
|
|
return IsDarwin ? getDarwinBinOpPrecedence(K, Kind, ShouldUseLogicalShr)
|
|
: getGNUBinOpPrecedence(K, Kind, ShouldUseLogicalShr);
|
|
}
|
|
|
|
/// Parse all binary operators with precedence >= 'Precedence'.
|
|
/// Res contains the LHS of the expression on input.
|
|
bool AsmParser::parseBinOpRHS(unsigned Precedence, const MCExpr *&Res,
|
|
SMLoc &EndLoc) {
|
|
SMLoc StartLoc = Lexer.getLoc();
|
|
while (true) {
|
|
MCBinaryExpr::Opcode Kind = MCBinaryExpr::Add;
|
|
unsigned TokPrec = getBinOpPrecedence(Lexer.getKind(), Kind);
|
|
|
|
// If the next token is lower precedence than we are allowed to eat, return
|
|
// successfully with what we ate already.
|
|
if (TokPrec < Precedence)
|
|
return false;
|
|
|
|
Lex();
|
|
|
|
// Eat the next primary expression.
|
|
const MCExpr *RHS;
|
|
if (getTargetParser().parsePrimaryExpr(RHS, EndLoc))
|
|
return true;
|
|
|
|
// If BinOp binds less tightly with RHS than the operator after RHS, let
|
|
// the pending operator take RHS as its LHS.
|
|
MCBinaryExpr::Opcode Dummy;
|
|
unsigned NextTokPrec = getBinOpPrecedence(Lexer.getKind(), Dummy);
|
|
if (TokPrec < NextTokPrec && parseBinOpRHS(TokPrec + 1, RHS, EndLoc))
|
|
return true;
|
|
|
|
// Merge LHS and RHS according to operator.
|
|
Res = MCBinaryExpr::create(Kind, Res, RHS, getContext(), StartLoc);
|
|
}
|
|
}
|
|
|
|
/// ParseStatement:
|
|
/// ::= EndOfStatement
|
|
/// ::= Label* Directive ...Operands... EndOfStatement
|
|
/// ::= Label* Identifier OperandList* EndOfStatement
|
|
bool AsmParser::parseStatement(ParseStatementInfo &Info,
|
|
MCAsmParserSemaCallback *SI) {
|
|
assert(!hasPendingError() && "parseStatement started with pending error");
|
|
// Eat initial spaces and comments
|
|
while (Lexer.is(AsmToken::Space))
|
|
Lex();
|
|
if (Lexer.is(AsmToken::EndOfStatement)) {
|
|
// if this is a line comment we can drop it safely
|
|
if (getTok().getString().empty() || getTok().getString().front() == '\r' ||
|
|
getTok().getString().front() == '\n')
|
|
Out.AddBlankLine();
|
|
Lex();
|
|
return false;
|
|
}
|
|
// Statements always start with an identifier.
|
|
AsmToken ID = getTok();
|
|
SMLoc IDLoc = ID.getLoc();
|
|
StringRef IDVal;
|
|
int64_t LocalLabelVal = -1;
|
|
if (Lexer.is(AsmToken::HashDirective))
|
|
return parseCppHashLineFilenameComment(IDLoc,
|
|
!isInsideMacroInstantiation());
|
|
|
|
// Allow an integer followed by a ':' as a directional local label.
|
|
if (Lexer.is(AsmToken::Integer)) {
|
|
LocalLabelVal = getTok().getIntVal();
|
|
if (LocalLabelVal < 0) {
|
|
if (!TheCondState.Ignore) {
|
|
Lex(); // always eat a token
|
|
return Error(IDLoc, "unexpected token at start of statement");
|
|
}
|
|
IDVal = "";
|
|
} else {
|
|
IDVal = getTok().getString();
|
|
Lex(); // Consume the integer token to be used as an identifier token.
|
|
if (Lexer.getKind() != AsmToken::Colon) {
|
|
if (!TheCondState.Ignore) {
|
|
Lex(); // always eat a token
|
|
return Error(IDLoc, "unexpected token at start of statement");
|
|
}
|
|
}
|
|
}
|
|
} else if (Lexer.is(AsmToken::Dot)) {
|
|
// Treat '.' as a valid identifier in this context.
|
|
Lex();
|
|
IDVal = ".";
|
|
} else if (Lexer.is(AsmToken::LCurly)) {
|
|
// Treat '{' as a valid identifier in this context.
|
|
Lex();
|
|
IDVal = "{";
|
|
|
|
} else if (Lexer.is(AsmToken::RCurly)) {
|
|
// Treat '}' as a valid identifier in this context.
|
|
Lex();
|
|
IDVal = "}";
|
|
} else if (Lexer.is(AsmToken::Star) &&
|
|
getTargetParser().starIsStartOfStatement()) {
|
|
// Accept '*' as a valid start of statement.
|
|
Lex();
|
|
IDVal = "*";
|
|
} else if (parseIdentifier(IDVal)) {
|
|
if (!TheCondState.Ignore) {
|
|
Lex(); // always eat a token
|
|
return Error(IDLoc, "unexpected token at start of statement");
|
|
}
|
|
IDVal = "";
|
|
}
|
|
|
|
// Handle conditional assembly here before checking for skipping. We
|
|
// have to do this so that .endif isn't skipped in a ".if 0" block for
|
|
// example.
|
|
StringMap<DirectiveKind>::const_iterator DirKindIt =
|
|
DirectiveKindMap.find(IDVal.lower());
|
|
DirectiveKind DirKind = (DirKindIt == DirectiveKindMap.end())
|
|
|
|
? DK_NO_DIRECTIVE
|
|
: DirKindIt->getValue();
|
|
switch (DirKind) {
|
|
default:
|
|
break;
|
|
case DK_IF:
|
|
case DK_IFEQ:
|
|
case DK_IFGE:
|
|
case DK_IFGT:
|
|
case DK_IFLE:
|
|
case DK_IFLT:
|
|
case DK_IFNE:
|
|
return parseDirectiveIf(IDLoc, DirKind);
|
|
case DK_IFB:
|
|
return parseDirectiveIfb(IDLoc, true);
|
|
case DK_IFNB:
|
|
return parseDirectiveIfb(IDLoc, false);
|
|
case DK_IFC:
|
|
return parseDirectiveIfc(IDLoc, true);
|
|
case DK_IFEQS:
|
|
return parseDirectiveIfeqs(IDLoc, true);
|
|
case DK_IFNC:
|
|
return parseDirectiveIfc(IDLoc, false);
|
|
case DK_IFNES:
|
|
return parseDirectiveIfeqs(IDLoc, false);
|
|
case DK_IFDEF:
|
|
return parseDirectiveIfdef(IDLoc, true);
|
|
case DK_IFNDEF:
|
|
case DK_IFNOTDEF:
|
|
return parseDirectiveIfdef(IDLoc, false);
|
|
case DK_ELSEIF:
|
|
return parseDirectiveElseIf(IDLoc);
|
|
case DK_ELSE:
|
|
return parseDirectiveElse(IDLoc);
|
|
case DK_ENDIF:
|
|
return parseDirectiveEndIf(IDLoc);
|
|
}
|
|
|
|
// Ignore the statement if in the middle of inactive conditional
|
|
// (e.g. ".if 0").
|
|
if (TheCondState.Ignore) {
|
|
eatToEndOfStatement();
|
|
return false;
|
|
}
|
|
|
|
// FIXME: Recurse on local labels?
|
|
|
|
// See what kind of statement we have.
|
|
switch (Lexer.getKind()) {
|
|
case AsmToken::Colon: {
|
|
if (!getTargetParser().isLabel(ID))
|
|
break;
|
|
if (checkForValidSection())
|
|
return true;
|
|
|
|
// identifier ':' -> Label.
|
|
Lex();
|
|
|
|
// Diagnose attempt to use '.' as a label.
|
|
if (IDVal == ".")
|
|
return Error(IDLoc, "invalid use of pseudo-symbol '.' as a label");
|
|
|
|
// Diagnose attempt to use a variable as a label.
|
|
//
|
|
// FIXME: Diagnostics. Note the location of the definition as a label.
|
|
// FIXME: This doesn't diagnose assignment to a symbol which has been
|
|
// implicitly marked as external.
|
|
MCSymbol *Sym;
|
|
if (LocalLabelVal == -1) {
|
|
if (ParsingMSInlineAsm && SI) {
|
|
StringRef RewrittenLabel =
|
|
SI->LookupInlineAsmLabel(IDVal, getSourceManager(), IDLoc, true);
|
|
assert(!RewrittenLabel.empty() &&
|
|
"We should have an internal name here.");
|
|
Info.AsmRewrites->emplace_back(AOK_Label, IDLoc, IDVal.size(),
|
|
RewrittenLabel);
|
|
IDVal = RewrittenLabel;
|
|
}
|
|
Sym = getContext().getOrCreateSymbol(IDVal);
|
|
} else
|
|
Sym = Ctx.createDirectionalLocalSymbol(LocalLabelVal);
|
|
// End of Labels should be treated as end of line for lexing
|
|
// purposes but that information is not available to the Lexer who
|
|
// does not understand Labels. This may cause us to see a Hash
|
|
// here instead of a preprocessor line comment.
|
|
if (getTok().is(AsmToken::Hash)) {
|
|
StringRef CommentStr = parseStringToEndOfStatement();
|
|
Lexer.Lex();
|
|
Lexer.UnLex(AsmToken(AsmToken::EndOfStatement, CommentStr));
|
|
}
|
|
|
|
// Consume any end of statement token, if present, to avoid spurious
|
|
// AddBlankLine calls().
|
|
if (getTok().is(AsmToken::EndOfStatement)) {
|
|
Lex();
|
|
}
|
|
|
|
getTargetParser().doBeforeLabelEmit(Sym);
|
|
|
|
// Emit the label.
|
|
if (!getTargetParser().isParsingMSInlineAsm())
|
|
Out.emitLabel(Sym, IDLoc);
|
|
|
|
// If we are generating dwarf for assembly source files then gather the
|
|
// info to make a dwarf label entry for this label if needed.
|
|
if (enabledGenDwarfForAssembly())
|
|
MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(),
|
|
IDLoc);
|
|
|
|
getTargetParser().onLabelParsed(Sym);
|
|
|
|
return false;
|
|
}
|
|
|
|
case AsmToken::Equal:
|
|
if (!getTargetParser().equalIsAsmAssignment())
|
|
break;
|
|
// identifier '=' ... -> assignment statement
|
|
Lex();
|
|
|
|
return parseAssignment(IDVal, true);
|
|
|
|
default: // Normal instruction or directive.
|
|
break;
|
|
}
|
|
|
|
// If macros are enabled, check to see if this is a macro instantiation.
|
|
if (areMacrosEnabled())
|
|
if (const MCAsmMacro *M = getContext().lookupMacro(IDVal)) {
|
|
return handleMacroEntry(M, IDLoc);
|
|
}
|
|
|
|
// Otherwise, we have a normal instruction or directive.
|
|
|
|
// Directives start with "."
|
|
if (IDVal.startswith(".") && IDVal != ".") {
|
|
// There are several entities interested in parsing directives:
|
|
//
|
|
// 1. The target-specific assembly parser. Some directives are target
|
|
// specific or may potentially behave differently on certain targets.
|
|
// 2. Asm parser extensions. For example, platform-specific parsers
|
|
// (like the ELF parser) register themselves as extensions.
|
|
// 3. The generic directive parser implemented by this class. These are
|
|
// all the directives that behave in a target and platform independent
|
|
// manner, or at least have a default behavior that's shared between
|
|
// all targets and platforms.
|
|
|
|
getTargetParser().flushPendingInstructions(getStreamer());
|
|
|
|
SMLoc StartTokLoc = getTok().getLoc();
|
|
bool TPDirectiveReturn = getTargetParser().ParseDirective(ID);
|
|
|
|
if (hasPendingError())
|
|
return true;
|
|
// Currently the return value should be true if we are
|
|
// uninterested but as this is at odds with the standard parsing
|
|
// convention (return true = error) we have instances of a parsed
|
|
// directive that fails returning true as an error. Catch these
|
|
// cases as best as possible errors here.
|
|
if (TPDirectiveReturn && StartTokLoc != getTok().getLoc())
|
|
return true;
|
|
// Return if we did some parsing or believe we succeeded.
|
|
if (!TPDirectiveReturn || StartTokLoc != getTok().getLoc())
|
|
return false;
|
|
|
|
// Next, check the extension directive map to see if any extension has
|
|
// registered itself to parse this directive.
|
|
std::pair<MCAsmParserExtension *, DirectiveHandler> Handler =
|
|
ExtensionDirectiveMap.lookup(IDVal);
|
|
if (Handler.first)
|
|
return (*Handler.second)(Handler.first, IDVal, IDLoc);
|
|
|
|
// Finally, if no one else is interested in this directive, it must be
|
|
// generic and familiar to this class.
|
|
switch (DirKind) {
|
|
default:
|
|
break;
|
|
case DK_SET:
|
|
case DK_EQU:
|
|
return parseDirectiveSet(IDVal, true);
|
|
case DK_EQUIV:
|
|
return parseDirectiveSet(IDVal, false);
|
|
case DK_ASCII:
|
|
return parseDirectiveAscii(IDVal, false);
|
|
case DK_ASCIZ:
|
|
case DK_STRING:
|
|
return parseDirectiveAscii(IDVal, true);
|
|
case DK_BYTE:
|
|
case DK_DC_B:
|
|
return parseDirectiveValue(IDVal, 1);
|
|
case DK_DC:
|
|
case DK_DC_W:
|
|
case DK_SHORT:
|
|
case DK_VALUE:
|
|
case DK_2BYTE:
|
|
return parseDirectiveValue(IDVal, 2);
|
|
case DK_LONG:
|
|
case DK_INT:
|
|
case DK_4BYTE:
|
|
case DK_DC_L:
|
|
return parseDirectiveValue(IDVal, 4);
|
|
case DK_QUAD:
|
|
case DK_8BYTE:
|
|
return parseDirectiveValue(IDVal, 8);
|
|
case DK_DC_A:
|
|
return parseDirectiveValue(
|
|
IDVal, getContext().getAsmInfo()->getCodePointerSize());
|
|
case DK_OCTA:
|
|
return parseDirectiveOctaValue(IDVal);
|
|
case DK_SINGLE:
|
|
case DK_FLOAT:
|
|
case DK_DC_S:
|
|
return parseDirectiveRealValue(IDVal, APFloat::IEEEsingle());
|
|
case DK_DOUBLE:
|
|
case DK_DC_D:
|
|
return parseDirectiveRealValue(IDVal, APFloat::IEEEdouble());
|
|
case DK_ALIGN: {
|
|
bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
|
|
return parseDirectiveAlign(IsPow2, /*ExprSize=*/1);
|
|
}
|
|
case DK_ALIGN32: {
|
|
bool IsPow2 = !getContext().getAsmInfo()->getAlignmentIsInBytes();
|
|
return parseDirectiveAlign(IsPow2, /*ExprSize=*/4);
|
|
}
|
|
case DK_BALIGN:
|
|
return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/1);
|
|
case DK_BALIGNW:
|
|
return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/2);
|
|
case DK_BALIGNL:
|
|
return parseDirectiveAlign(/*IsPow2=*/false, /*ExprSize=*/4);
|
|
case DK_P2ALIGN:
|
|
return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/1);
|
|
case DK_P2ALIGNW:
|
|
return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/2);
|
|
case DK_P2ALIGNL:
|
|
return parseDirectiveAlign(/*IsPow2=*/true, /*ExprSize=*/4);
|
|
case DK_ORG:
|
|
return parseDirectiveOrg();
|
|
case DK_FILL:
|
|
return parseDirectiveFill();
|
|
case DK_ZERO:
|
|
return parseDirectiveZero();
|
|
case DK_EXTERN:
|
|
eatToEndOfStatement(); // .extern is the default, ignore it.
|
|
return false;
|
|
case DK_GLOBL:
|
|
case DK_GLOBAL:
|
|
return parseDirectiveSymbolAttribute(MCSA_Global);
|
|
case DK_LAZY_REFERENCE:
|
|
return parseDirectiveSymbolAttribute(MCSA_LazyReference);
|
|
case DK_NO_DEAD_STRIP:
|
|
return parseDirectiveSymbolAttribute(MCSA_NoDeadStrip);
|
|
case DK_SYMBOL_RESOLVER:
|
|
return parseDirectiveSymbolAttribute(MCSA_SymbolResolver);
|
|
case DK_PRIVATE_EXTERN:
|
|
return parseDirectiveSymbolAttribute(MCSA_PrivateExtern);
|
|
case DK_REFERENCE:
|
|
return parseDirectiveSymbolAttribute(MCSA_Reference);
|
|
case DK_WEAK_DEFINITION:
|
|
return parseDirectiveSymbolAttribute(MCSA_WeakDefinition);
|
|
case DK_WEAK_REFERENCE:
|
|
return parseDirectiveSymbolAttribute(MCSA_WeakReference);
|
|
case DK_WEAK_DEF_CAN_BE_HIDDEN:
|
|
return parseDirectiveSymbolAttribute(MCSA_WeakDefAutoPrivate);
|
|
case DK_COLD:
|
|
return parseDirectiveSymbolAttribute(MCSA_Cold);
|
|
case DK_COMM:
|
|
case DK_COMMON:
|
|
return parseDirectiveComm(/*IsLocal=*/false);
|
|
case DK_LCOMM:
|
|
return parseDirectiveComm(/*IsLocal=*/true);
|
|
case DK_ABORT:
|
|
return parseDirectiveAbort();
|
|
case DK_INCLUDE:
|
|
return parseDirectiveInclude();
|
|
case DK_INCBIN:
|
|
return parseDirectiveIncbin();
|
|
case DK_CODE16:
|
|
case DK_CODE16GCC:
|
|
return TokError(Twine(IDVal) +
|
|
" not currently supported for this target");
|
|
case DK_REPT:
|
|
return parseDirectiveRept(IDLoc, IDVal);
|
|
case DK_IRP:
|
|
return parseDirectiveIrp(IDLoc);
|
|
case DK_IRPC:
|
|
return parseDirectiveIrpc(IDLoc);
|
|
case DK_ENDR:
|
|
return parseDirectiveEndr(IDLoc);
|
|
case DK_BUNDLE_ALIGN_MODE:
|
|
return parseDirectiveBundleAlignMode();
|
|
case DK_BUNDLE_LOCK:
|
|
return parseDirectiveBundleLock();
|
|
case DK_BUNDLE_UNLOCK:
|
|
return parseDirectiveBundleUnlock();
|
|
case DK_SLEB128:
|
|
return parseDirectiveLEB128(true);
|
|
case DK_ULEB128:
|
|
return parseDirectiveLEB128(false);
|
|
case DK_SPACE:
|
|
case DK_SKIP:
|
|
return parseDirectiveSpace(IDVal);
|
|
case DK_FILE:
|
|
return parseDirectiveFile(IDLoc);
|
|
case DK_LINE:
|
|
return parseDirectiveLine();
|
|
case DK_LOC:
|
|
return parseDirectiveLoc();
|
|
case DK_STABS:
|
|
return parseDirectiveStabs();
|
|
case DK_CV_FILE:
|
|
return parseDirectiveCVFile();
|
|
case DK_CV_FUNC_ID:
|
|
return parseDirectiveCVFuncId();
|
|
case DK_CV_INLINE_SITE_ID:
|
|
return parseDirectiveCVInlineSiteId();
|
|
case DK_CV_LOC:
|
|
return parseDirectiveCVLoc();
|
|
case DK_CV_LINETABLE:
|
|
return parseDirectiveCVLinetable();
|
|
case DK_CV_INLINE_LINETABLE:
|
|
return parseDirectiveCVInlineLinetable();
|
|
case DK_CV_DEF_RANGE:
|
|
return parseDirectiveCVDefRange();
|
|
case DK_CV_STRING:
|
|
return parseDirectiveCVString();
|
|
case DK_CV_STRINGTABLE:
|
|
return parseDirectiveCVStringTable();
|
|
case DK_CV_FILECHECKSUMS:
|
|
return parseDirectiveCVFileChecksums();
|
|
case DK_CV_FILECHECKSUM_OFFSET:
|
|
return parseDirectiveCVFileChecksumOffset();
|
|
case DK_CV_FPO_DATA:
|
|
return parseDirectiveCVFPOData();
|
|
case DK_CFI_SECTIONS:
|
|
return parseDirectiveCFISections();
|
|
case DK_CFI_STARTPROC:
|
|
return parseDirectiveCFIStartProc();
|
|
case DK_CFI_ENDPROC:
|
|
return parseDirectiveCFIEndProc();
|
|
case DK_CFI_DEF_CFA:
|
|
return parseDirectiveCFIDefCfa(IDLoc);
|
|
case DK_CFI_DEF_CFA_OFFSET:
|
|
return parseDirectiveCFIDefCfaOffset();
|
|
case DK_CFI_ADJUST_CFA_OFFSET:
|
|
return parseDirectiveCFIAdjustCfaOffset();
|
|
case DK_CFI_DEF_CFA_REGISTER:
|
|
return parseDirectiveCFIDefCfaRegister(IDLoc);
|
|
case DK_CFI_OFFSET:
|
|
return parseDirectiveCFIOffset(IDLoc);
|
|
case DK_CFI_REL_OFFSET:
|
|
return parseDirectiveCFIRelOffset(IDLoc);
|
|
case DK_CFI_PERSONALITY:
|
|
return parseDirectiveCFIPersonalityOrLsda(true);
|
|
case DK_CFI_LSDA:
|
|
return parseDirectiveCFIPersonalityOrLsda(false);
|
|
case DK_CFI_REMEMBER_STATE:
|
|
return parseDirectiveCFIRememberState();
|
|
case DK_CFI_RESTORE_STATE:
|
|
return parseDirectiveCFIRestoreState();
|
|
case DK_CFI_SAME_VALUE:
|
|
return parseDirectiveCFISameValue(IDLoc);
|
|
case DK_CFI_RESTORE:
|
|
return parseDirectiveCFIRestore(IDLoc);
|
|
case DK_CFI_ESCAPE:
|
|
return parseDirectiveCFIEscape();
|
|
case DK_CFI_RETURN_COLUMN:
|
|
return parseDirectiveCFIReturnColumn(IDLoc);
|
|
case DK_CFI_SIGNAL_FRAME:
|
|
return parseDirectiveCFISignalFrame();
|
|
case DK_CFI_UNDEFINED:
|
|
return parseDirectiveCFIUndefined(IDLoc);
|
|
case DK_CFI_REGISTER:
|
|
return parseDirectiveCFIRegister(IDLoc);
|
|
case DK_CFI_WINDOW_SAVE:
|
|
return parseDirectiveCFIWindowSave();
|
|
case DK_MACROS_ON:
|
|
case DK_MACROS_OFF:
|
|
return parseDirectiveMacrosOnOff(IDVal);
|
|
case DK_MACRO:
|
|
return parseDirectiveMacro(IDLoc);
|
|
case DK_ALTMACRO:
|
|
case DK_NOALTMACRO:
|
|
return parseDirectiveAltmacro(IDVal);
|
|
case DK_EXITM:
|
|
return parseDirectiveExitMacro(IDVal);
|
|
case DK_ENDM:
|
|
case DK_ENDMACRO:
|
|
return parseDirectiveEndMacro(IDVal);
|
|
case DK_PURGEM:
|
|
return parseDirectivePurgeMacro(IDLoc);
|
|
case DK_END:
|
|
return parseDirectiveEnd(IDLoc);
|
|
case DK_ERR:
|
|
return parseDirectiveError(IDLoc, false);
|
|
case DK_ERROR:
|
|
return parseDirectiveError(IDLoc, true);
|
|
case DK_WARNING:
|
|
return parseDirectiveWarning(IDLoc);
|
|
case DK_RELOC:
|
|
return parseDirectiveReloc(IDLoc);
|
|
case DK_DCB:
|
|
case DK_DCB_W:
|
|
return parseDirectiveDCB(IDVal, 2);
|
|
case DK_DCB_B:
|
|
return parseDirectiveDCB(IDVal, 1);
|
|
case DK_DCB_D:
|
|
return parseDirectiveRealDCB(IDVal, APFloat::IEEEdouble());
|
|
case DK_DCB_L:
|
|
return parseDirectiveDCB(IDVal, 4);
|
|
case DK_DCB_S:
|
|
return parseDirectiveRealDCB(IDVal, APFloat::IEEEsingle());
|
|
case DK_DC_X:
|
|
case DK_DCB_X:
|
|
return TokError(Twine(IDVal) +
|
|
" not currently supported for this target");
|
|
case DK_DS:
|
|
case DK_DS_W:
|
|
return parseDirectiveDS(IDVal, 2);
|
|
case DK_DS_B:
|
|
return parseDirectiveDS(IDVal, 1);
|
|
case DK_DS_D:
|
|
return parseDirectiveDS(IDVal, 8);
|
|
case DK_DS_L:
|
|
case DK_DS_S:
|
|
return parseDirectiveDS(IDVal, 4);
|
|
case DK_DS_P:
|
|
case DK_DS_X:
|
|
return parseDirectiveDS(IDVal, 12);
|
|
case DK_PRINT:
|
|
return parseDirectivePrint(IDLoc);
|
|
case DK_ADDRSIG:
|
|
return parseDirectiveAddrsig();
|
|
case DK_ADDRSIG_SYM:
|
|
return parseDirectiveAddrsigSym();
|
|
}
|
|
|
|
return Error(IDLoc, "unknown directive");
|
|
}
|
|
|
|
// __asm _emit or __asm __emit
|
|
if (ParsingMSInlineAsm && (IDVal == "_emit" || IDVal == "__emit" ||
|
|
IDVal == "_EMIT" || IDVal == "__EMIT"))
|
|
return parseDirectiveMSEmit(IDLoc, Info, IDVal.size());
|
|
|
|
// __asm align
|
|
if (ParsingMSInlineAsm && (IDVal == "align" || IDVal == "ALIGN"))
|
|
return parseDirectiveMSAlign(IDLoc, Info);
|
|
|
|
if (ParsingMSInlineAsm && (IDVal == "even" || IDVal == "EVEN"))
|
|
Info.AsmRewrites->emplace_back(AOK_EVEN, IDLoc, 4);
|
|
if (checkForValidSection())
|
|
return true;
|
|
|
|
// Canonicalize the opcode to lower case.
|
|
std::string OpcodeStr = IDVal.lower();
|
|
ParseInstructionInfo IInfo(Info.AsmRewrites);
|
|
bool ParseHadError = getTargetParser().ParseInstruction(IInfo, OpcodeStr, ID,
|
|
Info.ParsedOperands);
|
|
Info.ParseError = ParseHadError;
|
|
|
|
// Dump the parsed representation, if requested.
|
|
if (getShowParsedOperands()) {
|
|
SmallString<256> Str;
|
|
raw_svector_ostream OS(Str);
|
|
OS << "parsed instruction: [";
|
|
for (unsigned i = 0; i != Info.ParsedOperands.size(); ++i) {
|
|
if (i != 0)
|
|
OS << ", ";
|
|
Info.ParsedOperands[i]->print(OS);
|
|
}
|
|
OS << "]";
|
|
|
|
printMessage(IDLoc, SourceMgr::DK_Note, OS.str());
|
|
}
|
|
|
|
// Fail even if ParseInstruction erroneously returns false.
|
|
if (hasPendingError() || ParseHadError)
|
|
return true;
|
|
|
|
// If we are generating dwarf for the current section then generate a .loc
|
|
// directive for the instruction.
|
|
if (!ParseHadError && enabledGenDwarfForAssembly() &&
|
|
getContext().getGenDwarfSectionSyms().count(
|
|
getStreamer().getCurrentSectionOnly())) {
|
|
unsigned Line;
|
|
if (ActiveMacros.empty())
|
|
Line = SrcMgr.FindLineNumber(IDLoc, CurBuffer);
|
|
else
|
|
Line = SrcMgr.FindLineNumber(ActiveMacros.front()->InstantiationLoc,
|
|
ActiveMacros.front()->ExitBuffer);
|
|
|
|
// If we previously parsed a cpp hash file line comment then make sure the
|
|
// current Dwarf File is for the CppHashFilename if not then emit the
|
|
// Dwarf File table for it and adjust the line number for the .loc.
|
|
if (!CppHashInfo.Filename.empty()) {
|
|
unsigned FileNumber = getStreamer().emitDwarfFileDirective(
|
|
0, StringRef(), CppHashInfo.Filename);
|
|
getContext().setGenDwarfFileNumber(FileNumber);
|
|
|
|
unsigned CppHashLocLineNo =
|
|
SrcMgr.FindLineNumber(CppHashInfo.Loc, CppHashInfo.Buf);
|
|
Line = CppHashInfo.LineNumber - 1 + (Line - CppHashLocLineNo);
|
|
}
|
|
|
|
getStreamer().emitDwarfLocDirective(
|
|
getContext().getGenDwarfFileNumber(), Line, 0,
|
|
DWARF2_LINE_DEFAULT_IS_STMT ? DWARF2_FLAG_IS_STMT : 0, 0, 0,
|
|
StringRef());
|
|
}
|
|
|
|
// If parsing succeeded, match the instruction.
|
|
if (!ParseHadError) {
|
|
uint64_t ErrorInfo;
|
|
if (getTargetParser().MatchAndEmitInstruction(
|
|
IDLoc, Info.Opcode, Info.ParsedOperands, Out, ErrorInfo,
|
|
getTargetParser().isParsingMSInlineAsm()))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Parse and erase curly braces marking block start/end
|
|
bool
|
|
AsmParser::parseCurlyBlockScope(SmallVectorImpl<AsmRewrite> &AsmStrRewrites) {
|
|
// Identify curly brace marking block start/end
|
|
if (Lexer.isNot(AsmToken::LCurly) && Lexer.isNot(AsmToken::RCurly))
|
|
return false;
|
|
|
|
SMLoc StartLoc = Lexer.getLoc();
|
|
Lex(); // Eat the brace
|
|
if (Lexer.is(AsmToken::EndOfStatement))
|
|
Lex(); // Eat EndOfStatement following the brace
|
|
|
|
// Erase the block start/end brace from the output asm string
|
|
AsmStrRewrites.emplace_back(AOK_Skip, StartLoc, Lexer.getLoc().getPointer() -
|
|
StartLoc.getPointer());
|
|
return true;
|
|
}
|
|
|
|
/// parseCppHashLineFilenameComment as this:
|
|
/// ::= # number "filename"
|
|
bool AsmParser::parseCppHashLineFilenameComment(SMLoc L, bool SaveLocInfo) {
|
|
Lex(); // Eat the hash token.
|
|
// Lexer only ever emits HashDirective if it fully formed if it's
|
|
// done the checking already so this is an internal error.
|
|
assert(getTok().is(AsmToken::Integer) &&
|
|
"Lexing Cpp line comment: Expected Integer");
|
|
int64_t LineNumber = getTok().getIntVal();
|
|
Lex();
|
|
assert(getTok().is(AsmToken::String) &&
|
|
"Lexing Cpp line comment: Expected String");
|
|
StringRef Filename = getTok().getString();
|
|
Lex();
|
|
|
|
if (!SaveLocInfo)
|
|
return false;
|
|
|
|
// Get rid of the enclosing quotes.
|
|
Filename = Filename.substr(1, Filename.size() - 2);
|
|
|
|
// Save the SMLoc, Filename and LineNumber for later use by diagnostics
|
|
// and possibly DWARF file info.
|
|
CppHashInfo.Loc = L;
|
|
CppHashInfo.Filename = Filename;
|
|
CppHashInfo.LineNumber = LineNumber;
|
|
CppHashInfo.Buf = CurBuffer;
|
|
if (FirstCppHashFilename.empty())
|
|
FirstCppHashFilename = Filename;
|
|
return false;
|
|
}
|
|
|
|
/// will use the last parsed cpp hash line filename comment
|
|
/// for the Filename and LineNo if any in the diagnostic.
|
|
void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
|
|
const AsmParser *Parser = static_cast<const AsmParser *>(Context);
|
|
raw_ostream &OS = errs();
|
|
|
|
const SourceMgr &DiagSrcMgr = *Diag.getSourceMgr();
|
|
SMLoc DiagLoc = Diag.getLoc();
|
|
unsigned DiagBuf = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
|
|
unsigned CppHashBuf =
|
|
Parser->SrcMgr.FindBufferContainingLoc(Parser->CppHashInfo.Loc);
|
|
|
|
// Like SourceMgr::printMessage() we need to print the include stack if any
|
|
// before printing the message.
|
|
unsigned DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
|
|
if (!Parser->SavedDiagHandler && DiagCurBuffer &&
|
|
DiagCurBuffer != DiagSrcMgr.getMainFileID()) {
|
|
SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer);
|
|
DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS);
|
|
}
|
|
|
|
// If we have not parsed a cpp hash line filename comment or the source
|
|
// manager changed or buffer changed (like in a nested include) then just
|
|
// print the normal diagnostic using its Filename and LineNo.
|
|
if (!Parser->CppHashInfo.LineNumber || &DiagSrcMgr != &Parser->SrcMgr ||
|
|
DiagBuf != CppHashBuf) {
|
|
if (Parser->SavedDiagHandler)
|
|
Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
|
|
else
|
|
Diag.print(nullptr, OS);
|
|
return;
|
|
}
|
|
|
|
// Use the CppHashFilename and calculate a line number based on the
|
|
// CppHashInfo.Loc and CppHashInfo.LineNumber relative to this Diag's SMLoc
|
|
// for the diagnostic.
|
|
const std::string &Filename = std::string(Parser->CppHashInfo.Filename);
|
|
|
|
int DiagLocLineNo = DiagSrcMgr.FindLineNumber(DiagLoc, DiagBuf);
|
|
int CppHashLocLineNo =
|
|
Parser->SrcMgr.FindLineNumber(Parser->CppHashInfo.Loc, CppHashBuf);
|
|
int LineNo =
|
|
Parser->CppHashInfo.LineNumber - 1 + (DiagLocLineNo - CppHashLocLineNo);
|
|
|
|
SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(), Filename, LineNo,
|
|
Diag.getColumnNo(), Diag.getKind(), Diag.getMessage(),
|
|
Diag.getLineContents(), Diag.getRanges());
|
|
|
|
if (Parser->SavedDiagHandler)
|
|
Parser->SavedDiagHandler(NewDiag, Parser->SavedDiagContext);
|
|
else
|
|
NewDiag.print(nullptr, OS);
|
|
}
|
|
|
|
// FIXME: This is mostly duplicated from the function in AsmLexer.cpp. The
|
|
// difference being that that function accepts '@' as part of identifiers and
|
|
// we can't do that. AsmLexer.cpp should probably be changed to handle
|
|
// '@' as a special case when needed.
|
|
static bool isIdentifierChar(char c) {
|
|
return isalnum(static_cast<unsigned char>(c)) || c == '_' || c == '$' ||
|
|
c == '.';
|
|
}
|
|
|
|
bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
|
|
ArrayRef<MCAsmMacroParameter> Parameters,
|
|
ArrayRef<MCAsmMacroArgument> A,
|
|
bool EnableAtPseudoVariable, SMLoc L) {
|
|
unsigned NParameters = Parameters.size();
|
|
bool HasVararg = NParameters ? Parameters.back().Vararg : false;
|
|
if ((!IsDarwin || NParameters != 0) && NParameters != A.size())
|
|
return Error(L, "Wrong number of arguments");
|
|
|
|
// A macro without parameters is handled differently on Darwin:
|
|
// gas accepts no arguments and does no substitutions
|
|
while (!Body.empty()) {
|
|
// Scan for the next substitution.
|
|
std::size_t End = Body.size(), Pos = 0;
|
|
for (; Pos != End; ++Pos) {
|
|
// Check for a substitution or escape.
|
|
if (IsDarwin && !NParameters) {
|
|
// This macro has no parameters, look for $0, $1, etc.
|
|
if (Body[Pos] != '$' || Pos + 1 == End)
|
|
continue;
|
|
|
|
char Next = Body[Pos + 1];
|
|
if (Next == '$' || Next == 'n' ||
|
|
isdigit(static_cast<unsigned char>(Next)))
|
|
break;
|
|
} else {
|
|
// This macro has parameters, look for \foo, \bar, etc.
|
|
if (Body[Pos] == '\\' && Pos + 1 != End)
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Add the prefix.
|
|
OS << Body.slice(0, Pos);
|
|
|
|
// Check if we reached the end.
|
|
if (Pos == End)
|
|
break;
|
|
|
|
if (IsDarwin && !NParameters) {
|
|
switch (Body[Pos + 1]) {
|
|
// $$ => $
|
|
case '$':
|
|
OS << '$';
|
|
break;
|
|
|
|
// $n => number of arguments
|
|
case 'n':
|
|
OS << A.size();
|
|
break;
|
|
|
|
// $[0-9] => argument
|
|
default: {
|
|
// Missing arguments are ignored.
|
|
unsigned Index = Body[Pos + 1] - '0';
|
|
if (Index >= A.size())
|
|
break;
|
|
|
|
// Otherwise substitute with the token values, with spaces eliminated.
|
|
for (const AsmToken &Token : A[Index])
|
|
OS << Token.getString();
|
|
break;
|
|
}
|
|
}
|
|
Pos += 2;
|
|
} else {
|
|
unsigned I = Pos + 1;
|
|
|
|
// Check for the \@ pseudo-variable.
|
|
if (EnableAtPseudoVariable && Body[I] == '@' && I + 1 != End)
|
|
++I;
|
|
else
|
|
while (isIdentifierChar(Body[I]) && I + 1 != End)
|
|
++I;
|
|
|
|
const char *Begin = Body.data() + Pos + 1;
|
|
StringRef Argument(Begin, I - (Pos + 1));
|
|
unsigned Index = 0;
|
|
|
|
if (Argument == "@") {
|
|
OS << NumOfMacroInstantiations;
|
|
Pos += 2;
|
|
} else {
|
|
for (; Index < NParameters; ++Index)
|
|
if (Parameters[Index].Name == Argument)
|
|
break;
|
|
|
|
if (Index == NParameters) {
|
|
if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
|
|
Pos += 3;
|
|
else {
|
|
OS << '\\' << Argument;
|
|
Pos = I;
|
|
}
|
|
} else {
|
|
bool VarargParameter = HasVararg && Index == (NParameters - 1);
|
|
for (const AsmToken &Token : A[Index])
|
|
// For altmacro mode, you can write '%expr'.
|
|
// The prefix '%' evaluates the expression 'expr'
|
|
// and uses the result as a string (e.g. replace %(1+2) with the
|
|
// string "3").
|
|
// Here, we identify the integer token which is the result of the
|
|
// absolute expression evaluation and replace it with its string
|
|
// representation.
|
|
if (AltMacroMode && Token.getString().front() == '%' &&
|
|
Token.is(AsmToken::Integer))
|
|
// Emit an integer value to the buffer.
|
|
OS << Token.getIntVal();
|
|
// Only Token that was validated as a string and begins with '<'
|
|
// is considered altMacroString!!!
|
|
else if (AltMacroMode && Token.getString().front() == '<' &&
|
|
Token.is(AsmToken::String)) {
|
|
OS << angleBracketString(Token.getStringContents());
|
|
}
|
|
// We expect no quotes around the string's contents when
|
|
// parsing for varargs.
|
|
else if (Token.isNot(AsmToken::String) || VarargParameter)
|
|
OS << Token.getString();
|
|
else
|
|
OS << Token.getStringContents();
|
|
|
|
Pos += 1 + Argument.size();
|
|
}
|
|
}
|
|
}
|
|
// Update the scan point.
|
|
Body = Body.substr(Pos);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool isOperator(AsmToken::TokenKind kind) {
|
|
switch (kind) {
|
|
default:
|
|
return false;
|
|
case AsmToken::Plus:
|
|
case AsmToken::Minus:
|
|
case AsmToken::Tilde:
|
|
case AsmToken::Slash:
|
|
case AsmToken::Star:
|
|
case AsmToken::Dot:
|
|
case AsmToken::Equal:
|
|
case AsmToken::EqualEqual:
|
|
case AsmToken::Pipe:
|
|
case AsmToken::PipePipe:
|
|
case AsmToken::Caret:
|
|
case AsmToken::Amp:
|
|
case AsmToken::AmpAmp:
|
|
case AsmToken::Exclaim:
|
|
case AsmToken::ExclaimEqual:
|
|
case AsmToken::Less:
|
|
case AsmToken::LessEqual:
|
|
case AsmToken::LessLess:
|
|
case AsmToken::LessGreater:
|
|
case AsmToken::Greater:
|
|
case AsmToken::GreaterEqual:
|
|
case AsmToken::GreaterGreater:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
|
|
class AsmLexerSkipSpaceRAII {
|
|
public:
|
|
AsmLexerSkipSpaceRAII(AsmLexer &Lexer, bool SkipSpace) : Lexer(Lexer) {
|
|
Lexer.setSkipSpace(SkipSpace);
|
|
}
|
|
|
|
~AsmLexerSkipSpaceRAII() {
|
|
Lexer.setSkipSpace(true);
|
|
}
|
|
|
|
private:
|
|
AsmLexer &Lexer;
|
|
};
|
|
|
|
} // end anonymous namespace
|
|
|
|
bool AsmParser::parseMacroArgument(MCAsmMacroArgument &MA, bool Vararg) {
|
|
|
|
if (Vararg) {
|
|
if (Lexer.isNot(AsmToken::EndOfStatement)) {
|
|
StringRef Str = parseStringToEndOfStatement();
|
|
MA.emplace_back(AsmToken::String, Str);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
unsigned ParenLevel = 0;
|
|
|
|
// Darwin doesn't use spaces to delmit arguments.
|
|
AsmLexerSkipSpaceRAII ScopedSkipSpace(Lexer, IsDarwin);
|
|
|
|
bool SpaceEaten;
|
|
|
|
while (true) {
|
|
SpaceEaten = false;
|
|
if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal))
|
|
return TokError("unexpected token in macro instantiation");
|
|
|
|
if (ParenLevel == 0) {
|
|
|
|
if (Lexer.is(AsmToken::Comma))
|
|
break;
|
|
|
|
if (Lexer.is(AsmToken::Space)) {
|
|
SpaceEaten = true;
|
|
Lexer.Lex(); // Eat spaces
|
|
}
|
|
|
|
// Spaces can delimit parameters, but could also be part an expression.
|
|
// If the token after a space is an operator, add the token and the next
|
|
// one into this argument
|
|
if (!IsDarwin) {
|
|
if (isOperator(Lexer.getKind())) {
|
|
MA.push_back(getTok());
|
|
Lexer.Lex();
|
|
|
|
// Whitespace after an operator can be ignored.
|
|
if (Lexer.is(AsmToken::Space))
|
|
Lexer.Lex();
|
|
|
|
continue;
|
|
}
|
|
}
|
|
if (SpaceEaten)
|
|
break;
|
|
}
|
|
|
|
// handleMacroEntry relies on not advancing the lexer here
|
|
// to be able to fill in the remaining default parameter values
|
|
if (Lexer.is(AsmToken::EndOfStatement))
|
|
break;
|
|
|
|
// Adjust the current parentheses level.
|
|
if (Lexer.is(AsmToken::LParen))
|
|
++ParenLevel;
|
|
else if (Lexer.is(AsmToken::RParen) && ParenLevel)
|
|
--ParenLevel;
|
|
|
|
// Append the token to the current argument list.
|
|
MA.push_back(getTok());
|
|
Lexer.Lex();
|
|
}
|
|
|
|
if (ParenLevel != 0)
|
|
return TokError("unbalanced parentheses in macro argument");
|
|
return false;
|
|
}
|
|
|
|
// Parse the macro instantiation arguments.
|
|
bool AsmParser::parseMacroArguments(const MCAsmMacro *M,
|
|
MCAsmMacroArguments &A) {
|
|
const unsigned NParameters = M ? M->Parameters.size() : 0;
|
|
bool NamedParametersFound = false;
|
|
SmallVector<SMLoc, 4> FALocs;
|
|
|
|
A.resize(NParameters);
|
|
FALocs.resize(NParameters);
|
|
|
|
// Parse two kinds of macro invocations:
|
|
// - macros defined without any parameters accept an arbitrary number of them
|
|
// - macros defined with parameters accept at most that many of them
|
|
bool HasVararg = NParameters ? M->Parameters.back().Vararg : false;
|
|
for (unsigned Parameter = 0; !NParameters || Parameter < NParameters;
|
|
++Parameter) {
|
|
SMLoc IDLoc = Lexer.getLoc();
|
|
MCAsmMacroParameter FA;
|
|
|
|
if (Lexer.is(AsmToken::Identifier) && Lexer.peekTok().is(AsmToken::Equal)) {
|
|
if (parseIdentifier(FA.Name))
|
|
return Error(IDLoc, "invalid argument identifier for formal argument");
|
|
|
|
if (Lexer.isNot(AsmToken::Equal))
|
|
return TokError("expected '=' after formal parameter identifier");
|
|
|
|
Lex();
|
|
|
|
NamedParametersFound = true;
|
|
}
|
|
bool Vararg = HasVararg && Parameter == (NParameters - 1);
|
|
|
|
if (NamedParametersFound && FA.Name.empty())
|
|
return Error(IDLoc, "cannot mix positional and keyword arguments");
|
|
|
|
SMLoc StrLoc = Lexer.getLoc();
|
|
SMLoc EndLoc;
|
|
if (AltMacroMode && Lexer.is(AsmToken::Percent)) {
|
|
const MCExpr *AbsoluteExp;
|
|
int64_t Value;
|
|
/// Eat '%'
|
|
Lex();
|
|
if (parseExpression(AbsoluteExp, EndLoc))
|
|
return false;
|
|
if (!AbsoluteExp->evaluateAsAbsolute(Value,
|
|
getStreamer().getAssemblerPtr()))
|
|
return Error(StrLoc, "expected absolute expression");
|
|
const char *StrChar = StrLoc.getPointer();
|
|
const char *EndChar = EndLoc.getPointer();
|
|
AsmToken newToken(AsmToken::Integer,
|
|
StringRef(StrChar, EndChar - StrChar), Value);
|
|
FA.Value.push_back(newToken);
|
|
} else if (AltMacroMode && Lexer.is(AsmToken::Less) &&
|
|
isAngleBracketString(StrLoc, EndLoc)) {
|
|
const char *StrChar = StrLoc.getPointer();
|
|
const char *EndChar = EndLoc.getPointer();
|
|
jumpToLoc(EndLoc, CurBuffer);
|
|
/// Eat from '<' to '>'
|
|
Lex();
|
|
AsmToken newToken(AsmToken::String,
|
|
StringRef(StrChar, EndChar - StrChar));
|
|
FA.Value.push_back(newToken);
|
|
} else if(parseMacroArgument(FA.Value, Vararg))
|
|
return true;
|
|
|
|
unsigned PI = Parameter;
|
|
if (!FA.Name.empty()) {
|
|
unsigned FAI = 0;
|
|
for (FAI = 0; FAI < NParameters; ++FAI)
|
|
if (M->Parameters[FAI].Name == FA.Name)
|
|
break;
|
|
|
|
if (FAI >= NParameters) {
|
|
assert(M && "expected macro to be defined");
|
|
return Error(IDLoc, "parameter named '" + FA.Name +
|
|
"' does not exist for macro '" + M->Name + "'");
|
|
}
|
|
PI = FAI;
|
|
}
|
|
|
|
if (!FA.Value.empty()) {
|
|
if (A.size() <= PI)
|
|
A.resize(PI + 1);
|
|
A[PI] = FA.Value;
|
|
|
|
if (FALocs.size() <= PI)
|
|
FALocs.resize(PI + 1);
|
|
|
|
FALocs[PI] = Lexer.getLoc();
|
|
}
|
|
|
|
// At the end of the statement, fill in remaining arguments that have
|
|
// default values. If there aren't any, then the next argument is
|
|
// required but missing
|
|
if (Lexer.is(AsmToken::EndOfStatement)) {
|
|
bool Failure = false;
|
|
for (unsigned FAI = 0; FAI < NParameters; ++FAI) {
|
|
if (A[FAI].empty()) {
|
|
if (M->Parameters[FAI].Required) {
|
|
Error(FALocs[FAI].isValid() ? FALocs[FAI] : Lexer.getLoc(),
|
|
"missing value for required parameter "
|
|
"'" + M->Parameters[FAI].Name + "' in macro '" + M->Name + "'");
|
|
Failure = true;
|
|
}
|
|
|
|
if (!M->Parameters[FAI].Value.empty())
|
|
A[FAI] = M->Parameters[FAI].Value;
|
|
}
|
|
}
|
|
return Failure;
|
|
}
|
|
|
|
if (Lexer.is(AsmToken::Comma))
|
|
Lex();
|
|
}
|
|
|
|
return TokError("too many positional arguments");
|
|
}
|
|
|
|
bool AsmParser::handleMacroEntry(const MCAsmMacro *M, SMLoc NameLoc) {
|
|
// Arbitrarily limit macro nesting depth (default matches 'as'). We can
|
|
// eliminate this, although we should protect against infinite loops.
|
|
unsigned MaxNestingDepth = AsmMacroMaxNestingDepth;
|
|
if (ActiveMacros.size() == MaxNestingDepth) {
|
|
std::ostringstream MaxNestingDepthError;
|
|
MaxNestingDepthError << "macros cannot be nested more than "
|
|
<< MaxNestingDepth << " levels deep."
|
|
<< " Use -asm-macro-max-nesting-depth to increase "
|
|
"this limit.";
|
|
return TokError(MaxNestingDepthError.str());
|
|
}
|
|
|
|
MCAsmMacroArguments A;
|
|
if (parseMacroArguments(M, A))
|
|
return true;
|
|
|
|
// Macro instantiation is lexical, unfortunately. We construct a new buffer
|
|
// to hold the macro body with substitutions.
|
|
SmallString<256> Buf;
|
|
StringRef Body = M->Body;
|
|
raw_svector_ostream OS(Buf);
|
|
|
|
if (expandMacro(OS, Body, M->Parameters, A, true, getTok().getLoc()))
|
|
return true;
|
|
|
|
// We include the .endmacro in the buffer as our cue to exit the macro
|
|
// instantiation.
|
|
OS << ".endmacro\n";
|
|
|
|
std::unique_ptr<MemoryBuffer> Instantiation =
|
|
MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
|
|
|
|
// Create the macro instantiation object and add to the current macro
|
|
// instantiation stack.
|
|
MacroInstantiation *MI = new MacroInstantiation{
|
|
NameLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
|
|
ActiveMacros.push_back(MI);
|
|
|
|
++NumOfMacroInstantiations;
|
|
|
|
// Jump to the macro instantiation and prime the lexer.
|
|
CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
|
|
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
|
|
Lex();
|
|
|
|
return false;
|
|
}
|
|
|
|
void AsmParser::handleMacroExit() {
|
|
// Jump to the EndOfStatement we should return to, and consume it.
|
|
jumpToLoc(ActiveMacros.back()->ExitLoc, ActiveMacros.back()->ExitBuffer);
|
|
Lex();
|
|
|
|
// Pop the instantiation entry.
|
|
delete ActiveMacros.back();
|
|
ActiveMacros.pop_back();
|
|
}
|
|
|
|
bool AsmParser::parseAssignment(StringRef Name, bool allow_redef,
|
|
bool NoDeadStrip) {
|
|
MCSymbol *Sym;
|
|
const MCExpr *Value;
|
|
if (MCParserUtils::parseAssignmentExpression(Name, allow_redef, *this, Sym,
|
|
Value))
|
|
return true;
|
|
|
|
if (!Sym) {
|
|
// In the case where we parse an expression starting with a '.', we will
|
|
// not generate an error, nor will we create a symbol. In this case we
|
|
// should just return out.
|
|
return false;
|
|
}
|
|
|
|
// Do the assignment.
|
|
Out.emitAssignment(Sym, Value);
|
|
if (NoDeadStrip)
|
|
Out.emitSymbolAttribute(Sym, MCSA_NoDeadStrip);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseIdentifier:
|
|
/// ::= identifier
|
|
/// ::= string
|
|
bool AsmParser::parseIdentifier(StringRef &Res) {
|
|
// The assembler has relaxed rules for accepting identifiers, in particular we
|
|
// allow things like '.globl $foo' and '.def @feat.00', which would normally be
|
|
// separate tokens. At this level, we have already lexed so we cannot (currently)
|
|
// handle this as a context dependent token, instead we detect adjacent tokens
|
|
// and return the combined identifier.
|
|
if (Lexer.is(AsmToken::Dollar) || Lexer.is(AsmToken::At)) {
|
|
SMLoc PrefixLoc = getLexer().getLoc();
|
|
|
|
// Consume the prefix character, and check for a following identifier.
|
|
|
|
AsmToken Buf[1];
|
|
Lexer.peekTokens(Buf, false);
|
|
|
|
if (Buf[0].isNot(AsmToken::Identifier) && Buf[0].isNot(AsmToken::Integer))
|
|
return true;
|
|
|
|
// We have a '$' or '@' followed by an identifier or integer token, make
|
|
// sure they are adjacent.
|
|
if (PrefixLoc.getPointer() + 1 != Buf[0].getLoc().getPointer())
|
|
return true;
|
|
|
|
// eat $ or @
|
|
Lexer.Lex(); // Lexer's Lex guarantees consecutive token.
|
|
// Construct the joined identifier and consume the token.
|
|
Res = StringRef(PrefixLoc.getPointer(), getTok().getString().size() + 1);
|
|
Lex(); // Parser Lex to maintain invariants.
|
|
return false;
|
|
}
|
|
|
|
if (Lexer.isNot(AsmToken::Identifier) && Lexer.isNot(AsmToken::String))
|
|
return true;
|
|
|
|
Res = getTok().getIdentifier();
|
|
|
|
Lex(); // Consume the identifier token.
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveSet:
|
|
/// ::= .equ identifier ',' expression
|
|
/// ::= .equiv identifier ',' expression
|
|
/// ::= .set identifier ',' expression
|
|
bool AsmParser::parseDirectiveSet(StringRef IDVal, bool allow_redef) {
|
|
StringRef Name;
|
|
if (check(parseIdentifier(Name), "expected identifier") ||
|
|
parseToken(AsmToken::Comma) || parseAssignment(Name, allow_redef, true))
|
|
return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::parseEscapedString(std::string &Data) {
|
|
if (check(getTok().isNot(AsmToken::String), "expected string"))
|
|
return true;
|
|
|
|
Data = "";
|
|
StringRef Str = getTok().getStringContents();
|
|
for (unsigned i = 0, e = Str.size(); i != e; ++i) {
|
|
if (Str[i] != '\\') {
|
|
Data += Str[i];
|
|
continue;
|
|
}
|
|
|
|
// Recognize escaped characters. Note that this escape semantics currently
|
|
// loosely follows Darwin 'as'.
|
|
++i;
|
|
if (i == e)
|
|
return TokError("unexpected backslash at end of string");
|
|
|
|
// Recognize hex sequences similarly to GNU 'as'.
|
|
if (Str[i] == 'x' || Str[i] == 'X') {
|
|
size_t length = Str.size();
|
|
if (i + 1 >= length || !isHexDigit(Str[i + 1]))
|
|
return TokError("invalid hexadecimal escape sequence");
|
|
|
|
// Consume hex characters. GNU 'as' reads all hexadecimal characters and
|
|
// then truncates to the lower 16 bits. Seems reasonable.
|
|
unsigned Value = 0;
|
|
while (i + 1 < length && isHexDigit(Str[i + 1]))
|
|
Value = Value * 16 + hexDigitValue(Str[++i]);
|
|
|
|
Data += (unsigned char)(Value & 0xFF);
|
|
continue;
|
|
}
|
|
|
|
// Recognize octal sequences.
|
|
if ((unsigned)(Str[i] - '0') <= 7) {
|
|
// Consume up to three octal characters.
|
|
unsigned Value = Str[i] - '0';
|
|
|
|
if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
|
|
++i;
|
|
Value = Value * 8 + (Str[i] - '0');
|
|
|
|
if (i + 1 != e && ((unsigned)(Str[i + 1] - '0')) <= 7) {
|
|
++i;
|
|
Value = Value * 8 + (Str[i] - '0');
|
|
}
|
|
}
|
|
|
|
if (Value > 255)
|
|
return TokError("invalid octal escape sequence (out of range)");
|
|
|
|
Data += (unsigned char)Value;
|
|
continue;
|
|
}
|
|
|
|
// Otherwise recognize individual escapes.
|
|
switch (Str[i]) {
|
|
default:
|
|
// Just reject invalid escape sequences for now.
|
|
return TokError("invalid escape sequence (unrecognized character)");
|
|
|
|
case 'b': Data += '\b'; break;
|
|
case 'f': Data += '\f'; break;
|
|
case 'n': Data += '\n'; break;
|
|
case 'r': Data += '\r'; break;
|
|
case 't': Data += '\t'; break;
|
|
case '"': Data += '"'; break;
|
|
case '\\': Data += '\\'; break;
|
|
}
|
|
}
|
|
|
|
Lex();
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::parseAngleBracketString(std::string &Data) {
|
|
SMLoc EndLoc, StartLoc = getTok().getLoc();
|
|
if (isAngleBracketString(StartLoc, EndLoc)) {
|
|
const char *StartChar = StartLoc.getPointer() + 1;
|
|
const char *EndChar = EndLoc.getPointer() - 1;
|
|
jumpToLoc(EndLoc, CurBuffer);
|
|
/// Eat from '<' to '>'
|
|
Lex();
|
|
|
|
Data = angleBracketString(StringRef(StartChar, EndChar - StartChar));
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/// parseDirectiveAscii:
|
|
/// ::= ( .ascii | .asciz | .string ) [ "string" ( , "string" )* ]
|
|
bool AsmParser::parseDirectiveAscii(StringRef IDVal, bool ZeroTerminated) {
|
|
auto parseOp = [&]() -> bool {
|
|
std::string Data;
|
|
if (checkForValidSection() || parseEscapedString(Data))
|
|
return true;
|
|
getStreamer().emitBytes(Data);
|
|
if (ZeroTerminated)
|
|
getStreamer().emitBytes(StringRef("\0", 1));
|
|
return false;
|
|
};
|
|
|
|
if (parseMany(parseOp))
|
|
return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveReloc
|
|
/// ::= .reloc expression , identifier [ , expression ]
|
|
bool AsmParser::parseDirectiveReloc(SMLoc DirectiveLoc) {
|
|
const MCExpr *Offset;
|
|
const MCExpr *Expr = nullptr;
|
|
int64_t OffsetValue;
|
|
SMLoc OffsetLoc = Lexer.getTok().getLoc();
|
|
|
|
if (parseExpression(Offset))
|
|
return true;
|
|
|
|
if ((Offset->evaluateAsAbsolute(OffsetValue,
|
|
getStreamer().getAssemblerPtr()) &&
|
|
check(OffsetValue < 0, OffsetLoc, "expression is negative")) ||
|
|
(check(Offset->getKind() != llvm::MCExpr::Constant &&
|
|
Offset->getKind() != llvm::MCExpr::SymbolRef,
|
|
OffsetLoc, "expected non-negative number or a label")) ||
|
|
(parseToken(AsmToken::Comma, "expected comma") ||
|
|
check(getTok().isNot(AsmToken::Identifier), "expected relocation name")))
|
|
return true;
|
|
|
|
SMLoc NameLoc = Lexer.getTok().getLoc();
|
|
StringRef Name = Lexer.getTok().getIdentifier();
|
|
Lex();
|
|
|
|
if (Lexer.is(AsmToken::Comma)) {
|
|
Lex();
|
|
SMLoc ExprLoc = Lexer.getLoc();
|
|
if (parseExpression(Expr))
|
|
return true;
|
|
|
|
MCValue Value;
|
|
if (!Expr->evaluateAsRelocatable(Value, nullptr, nullptr))
|
|
return Error(ExprLoc, "expression must be relocatable");
|
|
}
|
|
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in .reloc directive"))
|
|
return true;
|
|
|
|
const MCTargetAsmParser &MCT = getTargetParser();
|
|
const MCSubtargetInfo &STI = MCT.getSTI();
|
|
if (getStreamer().emitRelocDirective(*Offset, Name, Expr, DirectiveLoc, STI))
|
|
return Error(NameLoc, "unknown relocation name");
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveValue
|
|
/// ::= (.byte | .short | ... ) [ expression (, expression)* ]
|
|
bool AsmParser::parseDirectiveValue(StringRef IDVal, unsigned Size) {
|
|
auto parseOp = [&]() -> bool {
|
|
const MCExpr *Value;
|
|
SMLoc ExprLoc = getLexer().getLoc();
|
|
if (checkForValidSection() || parseExpression(Value))
|
|
return true;
|
|
// Special case constant expressions to match code generator.
|
|
if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
|
|
assert(Size <= 8 && "Invalid size");
|
|
uint64_t IntValue = MCE->getValue();
|
|
if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
|
|
return Error(ExprLoc, "out of range literal value");
|
|
getStreamer().emitIntValue(IntValue, Size);
|
|
} else
|
|
getStreamer().emitValue(Value, Size, ExprLoc);
|
|
return false;
|
|
};
|
|
|
|
if (parseMany(parseOp))
|
|
return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
|
|
return false;
|
|
}
|
|
|
|
static bool parseHexOcta(AsmParser &Asm, uint64_t &hi, uint64_t &lo) {
|
|
if (Asm.getTok().isNot(AsmToken::Integer) &&
|
|
Asm.getTok().isNot(AsmToken::BigNum))
|
|
return Asm.TokError("unknown token in expression");
|
|
SMLoc ExprLoc = Asm.getTok().getLoc();
|
|
APInt IntValue = Asm.getTok().getAPIntVal();
|
|
Asm.Lex();
|
|
if (!IntValue.isIntN(128))
|
|
return Asm.Error(ExprLoc, "out of range literal value");
|
|
if (!IntValue.isIntN(64)) {
|
|
hi = IntValue.getHiBits(IntValue.getBitWidth() - 64).getZExtValue();
|
|
lo = IntValue.getLoBits(64).getZExtValue();
|
|
} else {
|
|
hi = 0;
|
|
lo = IntValue.getZExtValue();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// ParseDirectiveOctaValue
|
|
/// ::= .octa [ hexconstant (, hexconstant)* ]
|
|
|
|
bool AsmParser::parseDirectiveOctaValue(StringRef IDVal) {
|
|
auto parseOp = [&]() -> bool {
|
|
if (checkForValidSection())
|
|
return true;
|
|
uint64_t hi, lo;
|
|
if (parseHexOcta(*this, hi, lo))
|
|
return true;
|
|
if (MAI.isLittleEndian()) {
|
|
getStreamer().emitInt64(lo);
|
|
getStreamer().emitInt64(hi);
|
|
} else {
|
|
getStreamer().emitInt64(hi);
|
|
getStreamer().emitInt64(lo);
|
|
}
|
|
return false;
|
|
};
|
|
|
|
if (parseMany(parseOp))
|
|
return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::parseRealValue(const fltSemantics &Semantics, APInt &Res) {
|
|
// We don't truly support arithmetic on floating point expressions, so we
|
|
// have to manually parse unary prefixes.
|
|
bool IsNeg = false;
|
|
if (getLexer().is(AsmToken::Minus)) {
|
|
Lexer.Lex();
|
|
IsNeg = true;
|
|
} else if (getLexer().is(AsmToken::Plus))
|
|
Lexer.Lex();
|
|
|
|
if (Lexer.is(AsmToken::Error))
|
|
return TokError(Lexer.getErr());
|
|
if (Lexer.isNot(AsmToken::Integer) && Lexer.isNot(AsmToken::Real) &&
|
|
Lexer.isNot(AsmToken::Identifier))
|
|
return TokError("unexpected token in directive");
|
|
|
|
// Convert to an APFloat.
|
|
APFloat Value(Semantics);
|
|
StringRef IDVal = getTok().getString();
|
|
if (getLexer().is(AsmToken::Identifier)) {
|
|
if (!IDVal.compare_lower("infinity") || !IDVal.compare_lower("inf"))
|
|
Value = APFloat::getInf(Semantics);
|
|
else if (!IDVal.compare_lower("nan"))
|
|
Value = APFloat::getNaN(Semantics, false, ~0);
|
|
else
|
|
return TokError("invalid floating point literal");
|
|
} else if (errorToBool(
|
|
Value.convertFromString(IDVal, APFloat::rmNearestTiesToEven)
|
|
.takeError()))
|
|
return TokError("invalid floating point literal");
|
|
if (IsNeg)
|
|
Value.changeSign();
|
|
|
|
// Consume the numeric token.
|
|
Lex();
|
|
|
|
Res = Value.bitcastToAPInt();
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveRealValue
|
|
/// ::= (.single | .double) [ expression (, expression)* ]
|
|
bool AsmParser::parseDirectiveRealValue(StringRef IDVal,
|
|
const fltSemantics &Semantics) {
|
|
auto parseOp = [&]() -> bool {
|
|
APInt AsInt;
|
|
if (checkForValidSection() || parseRealValue(Semantics, AsInt))
|
|
return true;
|
|
getStreamer().emitIntValue(AsInt.getLimitedValue(),
|
|
AsInt.getBitWidth() / 8);
|
|
return false;
|
|
};
|
|
|
|
if (parseMany(parseOp))
|
|
return addErrorSuffix(" in '" + Twine(IDVal) + "' directive");
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveZero
|
|
/// ::= .zero expression
|
|
bool AsmParser::parseDirectiveZero() {
|
|
SMLoc NumBytesLoc = Lexer.getLoc();
|
|
const MCExpr *NumBytes;
|
|
if (checkForValidSection() || parseExpression(NumBytes))
|
|
return true;
|
|
|
|
int64_t Val = 0;
|
|
if (getLexer().is(AsmToken::Comma)) {
|
|
Lex();
|
|
if (parseAbsoluteExpression(Val))
|
|
return true;
|
|
}
|
|
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.zero' directive"))
|
|
return true;
|
|
getStreamer().emitFill(*NumBytes, Val, NumBytesLoc);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveFill
|
|
/// ::= .fill expression [ , expression [ , expression ] ]
|
|
bool AsmParser::parseDirectiveFill() {
|
|
SMLoc NumValuesLoc = Lexer.getLoc();
|
|
const MCExpr *NumValues;
|
|
if (checkForValidSection() || parseExpression(NumValues))
|
|
return true;
|
|
|
|
int64_t FillSize = 1;
|
|
int64_t FillExpr = 0;
|
|
|
|
SMLoc SizeLoc, ExprLoc;
|
|
|
|
if (parseOptionalToken(AsmToken::Comma)) {
|
|
SizeLoc = getTok().getLoc();
|
|
if (parseAbsoluteExpression(FillSize))
|
|
return true;
|
|
if (parseOptionalToken(AsmToken::Comma)) {
|
|
ExprLoc = getTok().getLoc();
|
|
if (parseAbsoluteExpression(FillExpr))
|
|
return true;
|
|
}
|
|
}
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.fill' directive"))
|
|
return true;
|
|
|
|
if (FillSize < 0) {
|
|
Warning(SizeLoc, "'.fill' directive with negative size has no effect");
|
|
return false;
|
|
}
|
|
if (FillSize > 8) {
|
|
Warning(SizeLoc, "'.fill' directive with size greater than 8 has been truncated to 8");
|
|
FillSize = 8;
|
|
}
|
|
|
|
if (!isUInt<32>(FillExpr) && FillSize > 4)
|
|
Warning(ExprLoc, "'.fill' directive pattern has been truncated to 32-bits");
|
|
|
|
getStreamer().emitFill(*NumValues, FillSize, FillExpr, NumValuesLoc);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveOrg
|
|
/// ::= .org expression [ , expression ]
|
|
bool AsmParser::parseDirectiveOrg() {
|
|
const MCExpr *Offset;
|
|
SMLoc OffsetLoc = Lexer.getLoc();
|
|
if (checkForValidSection() || parseExpression(Offset))
|
|
return true;
|
|
|
|
// Parse optional fill expression.
|
|
int64_t FillExpr = 0;
|
|
if (parseOptionalToken(AsmToken::Comma))
|
|
if (parseAbsoluteExpression(FillExpr))
|
|
return addErrorSuffix(" in '.org' directive");
|
|
if (parseToken(AsmToken::EndOfStatement))
|
|
return addErrorSuffix(" in '.org' directive");
|
|
|
|
getStreamer().emitValueToOffset(Offset, FillExpr, OffsetLoc);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveAlign
|
|
/// ::= {.align, ...} expression [ , expression [ , expression ]]
|
|
bool AsmParser::parseDirectiveAlign(bool IsPow2, unsigned ValueSize) {
|
|
SMLoc AlignmentLoc = getLexer().getLoc();
|
|
int64_t Alignment;
|
|
SMLoc MaxBytesLoc;
|
|
bool HasFillExpr = false;
|
|
int64_t FillExpr = 0;
|
|
int64_t MaxBytesToFill = 0;
|
|
|
|
auto parseAlign = [&]() -> bool {
|
|
if (parseAbsoluteExpression(Alignment))
|
|
return true;
|
|
if (parseOptionalToken(AsmToken::Comma)) {
|
|
// The fill expression can be omitted while specifying a maximum number of
|
|
// alignment bytes, e.g:
|
|
// .align 3,,4
|
|
if (getTok().isNot(AsmToken::Comma)) {
|
|
HasFillExpr = true;
|
|
if (parseAbsoluteExpression(FillExpr))
|
|
return true;
|
|
}
|
|
if (parseOptionalToken(AsmToken::Comma))
|
|
if (parseTokenLoc(MaxBytesLoc) ||
|
|
parseAbsoluteExpression(MaxBytesToFill))
|
|
return true;
|
|
}
|
|
return parseToken(AsmToken::EndOfStatement);
|
|
};
|
|
|
|
if (checkForValidSection())
|
|
return addErrorSuffix(" in directive");
|
|
// Ignore empty '.p2align' directives for GNU-as compatibility
|
|
if (IsPow2 && (ValueSize == 1) && getTok().is(AsmToken::EndOfStatement)) {
|
|
Warning(AlignmentLoc, "p2align directive with no operand(s) is ignored");
|
|
return parseToken(AsmToken::EndOfStatement);
|
|
}
|
|
if (parseAlign())
|
|
return addErrorSuffix(" in directive");
|
|
|
|
// Always emit an alignment here even if we thrown an error.
|
|
bool ReturnVal = false;
|
|
|
|
// Compute alignment in bytes.
|
|
if (IsPow2) {
|
|
// FIXME: Diagnose overflow.
|
|
if (Alignment >= 32) {
|
|
ReturnVal |= Error(AlignmentLoc, "invalid alignment value");
|
|
Alignment = 31;
|
|
}
|
|
|
|
Alignment = 1ULL << Alignment;
|
|
} else {
|
|
// Reject alignments that aren't either a power of two or zero,
|
|
// for gas compatibility. Alignment of zero is silently rounded
|
|
// up to one.
|
|
if (Alignment == 0)
|
|
Alignment = 1;
|
|
if (!isPowerOf2_64(Alignment))
|
|
ReturnVal |= Error(AlignmentLoc, "alignment must be a power of 2");
|
|
}
|
|
|
|
// Diagnose non-sensical max bytes to align.
|
|
if (MaxBytesLoc.isValid()) {
|
|
if (MaxBytesToFill < 1) {
|
|
ReturnVal |= Error(MaxBytesLoc,
|
|
"alignment directive can never be satisfied in this "
|
|
"many bytes, ignoring maximum bytes expression");
|
|
MaxBytesToFill = 0;
|
|
}
|
|
|
|
if (MaxBytesToFill >= Alignment) {
|
|
Warning(MaxBytesLoc, "maximum bytes expression exceeds alignment and "
|
|
"has no effect");
|
|
MaxBytesToFill = 0;
|
|
}
|
|
}
|
|
|
|
// Check whether we should use optimal code alignment for this .align
|
|
// directive.
|
|
const MCSection *Section = getStreamer().getCurrentSectionOnly();
|
|
assert(Section && "must have section to emit alignment");
|
|
bool UseCodeAlign = Section->UseCodeAlign();
|
|
if ((!HasFillExpr || Lexer.getMAI().getTextAlignFillValue() == FillExpr) &&
|
|
ValueSize == 1 && UseCodeAlign) {
|
|
getStreamer().emitCodeAlignment(Alignment, MaxBytesToFill);
|
|
} else {
|
|
// FIXME: Target specific behavior about how the "extra" bytes are filled.
|
|
getStreamer().emitValueToAlignment(Alignment, FillExpr, ValueSize,
|
|
MaxBytesToFill);
|
|
}
|
|
|
|
return ReturnVal;
|
|
}
|
|
|
|
/// parseDirectiveFile
|
|
/// ::= .file filename
|
|
/// ::= .file number [directory] filename [md5 checksum] [source source-text]
|
|
bool AsmParser::parseDirectiveFile(SMLoc DirectiveLoc) {
|
|
// FIXME: I'm not sure what this is.
|
|
int64_t FileNumber = -1;
|
|
if (getLexer().is(AsmToken::Integer)) {
|
|
FileNumber = getTok().getIntVal();
|
|
Lex();
|
|
|
|
if (FileNumber < 0)
|
|
return TokError("negative file number");
|
|
}
|
|
|
|
std::string Path;
|
|
|
|
// Usually the directory and filename together, otherwise just the directory.
|
|
// Allow the strings to have escaped octal character sequence.
|
|
if (check(getTok().isNot(AsmToken::String),
|
|
"unexpected token in '.file' directive") ||
|
|
parseEscapedString(Path))
|
|
return true;
|
|
|
|
StringRef Directory;
|
|
StringRef Filename;
|
|
std::string FilenameData;
|
|
if (getLexer().is(AsmToken::String)) {
|
|
if (check(FileNumber == -1,
|
|
"explicit path specified, but no file number") ||
|
|
parseEscapedString(FilenameData))
|
|
return true;
|
|
Filename = FilenameData;
|
|
Directory = Path;
|
|
} else {
|
|
Filename = Path;
|
|
}
|
|
|
|
uint64_t MD5Hi, MD5Lo;
|
|
bool HasMD5 = false;
|
|
|
|
Optional<StringRef> Source;
|
|
bool HasSource = false;
|
|
std::string SourceString;
|
|
|
|
while (!parseOptionalToken(AsmToken::EndOfStatement)) {
|
|
StringRef Keyword;
|
|
if (check(getTok().isNot(AsmToken::Identifier),
|
|
"unexpected token in '.file' directive") ||
|
|
parseIdentifier(Keyword))
|
|
return true;
|
|
if (Keyword == "md5") {
|
|
HasMD5 = true;
|
|
if (check(FileNumber == -1,
|
|
"MD5 checksum specified, but no file number") ||
|
|
parseHexOcta(*this, MD5Hi, MD5Lo))
|
|
return true;
|
|
} else if (Keyword == "source") {
|
|
HasSource = true;
|
|
if (check(FileNumber == -1,
|
|
"source specified, but no file number") ||
|
|
check(getTok().isNot(AsmToken::String),
|
|
"unexpected token in '.file' directive") ||
|
|
parseEscapedString(SourceString))
|
|
return true;
|
|
} else {
|
|
return TokError("unexpected token in '.file' directive");
|
|
}
|
|
}
|
|
|
|
if (FileNumber == -1) {
|
|
// Ignore the directive if there is no number and the target doesn't support
|
|
// numberless .file directives. This allows some portability of assembler
|
|
// between different object file formats.
|
|
if (getContext().getAsmInfo()->hasSingleParameterDotFile())
|
|
getStreamer().emitFileDirective(Filename);
|
|
} else {
|
|
// In case there is a -g option as well as debug info from directive .file,
|
|
// we turn off the -g option, directly use the existing debug info instead.
|
|
// Throw away any implicit file table for the assembler source.
|
|
if (Ctx.getGenDwarfForAssembly()) {
|
|
Ctx.getMCDwarfLineTable(0).resetFileTable();
|
|
Ctx.setGenDwarfForAssembly(false);
|
|
}
|
|
|
|
Optional<MD5::MD5Result> CKMem;
|
|
if (HasMD5) {
|
|
MD5::MD5Result Sum;
|
|
for (unsigned i = 0; i != 8; ++i) {
|
|
Sum.Bytes[i] = uint8_t(MD5Hi >> ((7 - i) * 8));
|
|
Sum.Bytes[i + 8] = uint8_t(MD5Lo >> ((7 - i) * 8));
|
|
}
|
|
CKMem = Sum;
|
|
}
|
|
if (HasSource) {
|
|
char *SourceBuf = static_cast<char *>(Ctx.allocate(SourceString.size()));
|
|
memcpy(SourceBuf, SourceString.data(), SourceString.size());
|
|
Source = StringRef(SourceBuf, SourceString.size());
|
|
}
|
|
if (FileNumber == 0) {
|
|
if (Ctx.getDwarfVersion() < 5)
|
|
return Warning(DirectiveLoc, "file 0 not supported prior to DWARF-5");
|
|
getStreamer().emitDwarfFile0Directive(Directory, Filename, CKMem, Source);
|
|
} else {
|
|
Expected<unsigned> FileNumOrErr = getStreamer().tryEmitDwarfFileDirective(
|
|
FileNumber, Directory, Filename, CKMem, Source);
|
|
if (!FileNumOrErr)
|
|
return Error(DirectiveLoc, toString(FileNumOrErr.takeError()));
|
|
}
|
|
// Alert the user if there are some .file directives with MD5 and some not.
|
|
// But only do that once.
|
|
if (!ReportedInconsistentMD5 && !Ctx.isDwarfMD5UsageConsistent(0)) {
|
|
ReportedInconsistentMD5 = true;
|
|
return Warning(DirectiveLoc, "inconsistent use of MD5 checksums");
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveLine
|
|
/// ::= .line [number]
|
|
bool AsmParser::parseDirectiveLine() {
|
|
int64_t LineNumber;
|
|
if (getLexer().is(AsmToken::Integer)) {
|
|
if (parseIntToken(LineNumber, "unexpected token in '.line' directive"))
|
|
return true;
|
|
(void)LineNumber;
|
|
// FIXME: Do something with the .line.
|
|
}
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.line' directive"))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveLoc
|
|
/// ::= .loc FileNumber [LineNumber] [ColumnPos] [basic_block] [prologue_end]
|
|
/// [epilogue_begin] [is_stmt VALUE] [isa VALUE]
|
|
/// The first number is a file number, must have been previously assigned with
|
|
/// a .file directive, the second number is the line number and optionally the
|
|
/// third number is a column position (zero if not specified). The remaining
|
|
/// optional items are .loc sub-directives.
|
|
bool AsmParser::parseDirectiveLoc() {
|
|
int64_t FileNumber = 0, LineNumber = 0;
|
|
SMLoc Loc = getTok().getLoc();
|
|
if (parseIntToken(FileNumber, "unexpected token in '.loc' directive") ||
|
|
check(FileNumber < 1 && Ctx.getDwarfVersion() < 5, Loc,
|
|
"file number less than one in '.loc' directive") ||
|
|
check(!getContext().isValidDwarfFileNumber(FileNumber), Loc,
|
|
"unassigned file number in '.loc' directive"))
|
|
return true;
|
|
|
|
// optional
|
|
if (getLexer().is(AsmToken::Integer)) {
|
|
LineNumber = getTok().getIntVal();
|
|
if (LineNumber < 0)
|
|
return TokError("line number less than zero in '.loc' directive");
|
|
Lex();
|
|
}
|
|
|
|
int64_t ColumnPos = 0;
|
|
if (getLexer().is(AsmToken::Integer)) {
|
|
ColumnPos = getTok().getIntVal();
|
|
if (ColumnPos < 0)
|
|
return TokError("column position less than zero in '.loc' directive");
|
|
Lex();
|
|
}
|
|
|
|
auto PrevFlags = getContext().getCurrentDwarfLoc().getFlags();
|
|
unsigned Flags = PrevFlags & DWARF2_FLAG_IS_STMT;
|
|
unsigned Isa = 0;
|
|
int64_t Discriminator = 0;
|
|
|
|
auto parseLocOp = [&]() -> bool {
|
|
StringRef Name;
|
|
SMLoc Loc = getTok().getLoc();
|
|
if (parseIdentifier(Name))
|
|
return TokError("unexpected token in '.loc' directive");
|
|
|
|
if (Name == "basic_block")
|
|
Flags |= DWARF2_FLAG_BASIC_BLOCK;
|
|
else if (Name == "prologue_end")
|
|
Flags |= DWARF2_FLAG_PROLOGUE_END;
|
|
else if (Name == "epilogue_begin")
|
|
Flags |= DWARF2_FLAG_EPILOGUE_BEGIN;
|
|
else if (Name == "is_stmt") {
|
|
Loc = getTok().getLoc();
|
|
const MCExpr *Value;
|
|
if (parseExpression(Value))
|
|
return true;
|
|
// The expression must be the constant 0 or 1.
|
|
if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
|
|
int Value = MCE->getValue();
|
|
if (Value == 0)
|
|
Flags &= ~DWARF2_FLAG_IS_STMT;
|
|
else if (Value == 1)
|
|
Flags |= DWARF2_FLAG_IS_STMT;
|
|
else
|
|
return Error(Loc, "is_stmt value not 0 or 1");
|
|
} else {
|
|
return Error(Loc, "is_stmt value not the constant value of 0 or 1");
|
|
}
|
|
} else if (Name == "isa") {
|
|
Loc = getTok().getLoc();
|
|
const MCExpr *Value;
|
|
if (parseExpression(Value))
|
|
return true;
|
|
// The expression must be a constant greater or equal to 0.
|
|
if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
|
|
int Value = MCE->getValue();
|
|
if (Value < 0)
|
|
return Error(Loc, "isa number less than zero");
|
|
Isa = Value;
|
|
} else {
|
|
return Error(Loc, "isa number not a constant value");
|
|
}
|
|
} else if (Name == "discriminator") {
|
|
if (parseAbsoluteExpression(Discriminator))
|
|
return true;
|
|
} else {
|
|
return Error(Loc, "unknown sub-directive in '.loc' directive");
|
|
}
|
|
return false;
|
|
};
|
|
|
|
if (parseMany(parseLocOp, false /*hasComma*/))
|
|
return true;
|
|
|
|
getStreamer().emitDwarfLocDirective(FileNumber, LineNumber, ColumnPos, Flags,
|
|
Isa, Discriminator, StringRef());
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveStabs
|
|
/// ::= .stabs string, number, number, number
|
|
bool AsmParser::parseDirectiveStabs() {
|
|
return TokError("unsupported directive '.stabs'");
|
|
}
|
|
|
|
/// parseDirectiveCVFile
|
|
/// ::= .cv_file number filename [checksum] [checksumkind]
|
|
bool AsmParser::parseDirectiveCVFile() {
|
|
SMLoc FileNumberLoc = getTok().getLoc();
|
|
int64_t FileNumber;
|
|
std::string Filename;
|
|
std::string Checksum;
|
|
int64_t ChecksumKind = 0;
|
|
|
|
if (parseIntToken(FileNumber,
|
|
"expected file number in '.cv_file' directive") ||
|
|
check(FileNumber < 1, FileNumberLoc, "file number less than one") ||
|
|
check(getTok().isNot(AsmToken::String),
|
|
"unexpected token in '.cv_file' directive") ||
|
|
parseEscapedString(Filename))
|
|
return true;
|
|
if (!parseOptionalToken(AsmToken::EndOfStatement)) {
|
|
if (check(getTok().isNot(AsmToken::String),
|
|
"unexpected token in '.cv_file' directive") ||
|
|
parseEscapedString(Checksum) ||
|
|
parseIntToken(ChecksumKind,
|
|
"expected checksum kind in '.cv_file' directive") ||
|
|
parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.cv_file' directive"))
|
|
return true;
|
|
}
|
|
|
|
Checksum = fromHex(Checksum);
|
|
void *CKMem = Ctx.allocate(Checksum.size(), 1);
|
|
memcpy(CKMem, Checksum.data(), Checksum.size());
|
|
ArrayRef<uint8_t> ChecksumAsBytes(reinterpret_cast<const uint8_t *>(CKMem),
|
|
Checksum.size());
|
|
|
|
if (!getStreamer().EmitCVFileDirective(FileNumber, Filename, ChecksumAsBytes,
|
|
static_cast<uint8_t>(ChecksumKind)))
|
|
return Error(FileNumberLoc, "file number already allocated");
|
|
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::parseCVFunctionId(int64_t &FunctionId,
|
|
StringRef DirectiveName) {
|
|
SMLoc Loc;
|
|
return parseTokenLoc(Loc) ||
|
|
parseIntToken(FunctionId, "expected function id in '" + DirectiveName +
|
|
"' directive") ||
|
|
check(FunctionId < 0 || FunctionId >= UINT_MAX, Loc,
|
|
"expected function id within range [0, UINT_MAX)");
|
|
}
|
|
|
|
bool AsmParser::parseCVFileId(int64_t &FileNumber, StringRef DirectiveName) {
|
|
SMLoc Loc;
|
|
return parseTokenLoc(Loc) ||
|
|
parseIntToken(FileNumber, "expected integer in '" + DirectiveName +
|
|
"' directive") ||
|
|
check(FileNumber < 1, Loc, "file number less than one in '" +
|
|
DirectiveName + "' directive") ||
|
|
check(!getCVContext().isValidFileNumber(FileNumber), Loc,
|
|
"unassigned file number in '" + DirectiveName + "' directive");
|
|
}
|
|
|
|
/// parseDirectiveCVFuncId
|
|
/// ::= .cv_func_id FunctionId
|
|
///
|
|
/// Introduces a function ID that can be used with .cv_loc.
|
|
bool AsmParser::parseDirectiveCVFuncId() {
|
|
SMLoc FunctionIdLoc = getTok().getLoc();
|
|
int64_t FunctionId;
|
|
|
|
if (parseCVFunctionId(FunctionId, ".cv_func_id") ||
|
|
parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.cv_func_id' directive"))
|
|
return true;
|
|
|
|
if (!getStreamer().EmitCVFuncIdDirective(FunctionId))
|
|
return Error(FunctionIdLoc, "function id already allocated");
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCVInlineSiteId
|
|
/// ::= .cv_inline_site_id FunctionId
|
|
/// "within" IAFunc
|
|
/// "inlined_at" IAFile IALine [IACol]
|
|
///
|
|
/// Introduces a function ID that can be used with .cv_loc. Includes "inlined
|
|
/// at" source location information for use in the line table of the caller,
|
|
/// whether the caller is a real function or another inlined call site.
|
|
bool AsmParser::parseDirectiveCVInlineSiteId() {
|
|
SMLoc FunctionIdLoc = getTok().getLoc();
|
|
int64_t FunctionId;
|
|
int64_t IAFunc;
|
|
int64_t IAFile;
|
|
int64_t IALine;
|
|
int64_t IACol = 0;
|
|
|
|
// FunctionId
|
|
if (parseCVFunctionId(FunctionId, ".cv_inline_site_id"))
|
|
return true;
|
|
|
|
// "within"
|
|
if (check((getLexer().isNot(AsmToken::Identifier) ||
|
|
getTok().getIdentifier() != "within"),
|
|
"expected 'within' identifier in '.cv_inline_site_id' directive"))
|
|
return true;
|
|
Lex();
|
|
|
|
// IAFunc
|
|
if (parseCVFunctionId(IAFunc, ".cv_inline_site_id"))
|
|
return true;
|
|
|
|
// "inlined_at"
|
|
if (check((getLexer().isNot(AsmToken::Identifier) ||
|
|
getTok().getIdentifier() != "inlined_at"),
|
|
"expected 'inlined_at' identifier in '.cv_inline_site_id' "
|
|
"directive") )
|
|
return true;
|
|
Lex();
|
|
|
|
// IAFile IALine
|
|
if (parseCVFileId(IAFile, ".cv_inline_site_id") ||
|
|
parseIntToken(IALine, "expected line number after 'inlined_at'"))
|
|
return true;
|
|
|
|
// [IACol]
|
|
if (getLexer().is(AsmToken::Integer)) {
|
|
IACol = getTok().getIntVal();
|
|
Lex();
|
|
}
|
|
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.cv_inline_site_id' directive"))
|
|
return true;
|
|
|
|
if (!getStreamer().EmitCVInlineSiteIdDirective(FunctionId, IAFunc, IAFile,
|
|
IALine, IACol, FunctionIdLoc))
|
|
return Error(FunctionIdLoc, "function id already allocated");
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCVLoc
|
|
/// ::= .cv_loc FunctionId FileNumber [LineNumber] [ColumnPos] [prologue_end]
|
|
/// [is_stmt VALUE]
|
|
/// The first number is a file number, must have been previously assigned with
|
|
/// a .file directive, the second number is the line number and optionally the
|
|
/// third number is a column position (zero if not specified). The remaining
|
|
/// optional items are .loc sub-directives.
|
|
bool AsmParser::parseDirectiveCVLoc() {
|
|
SMLoc DirectiveLoc = getTok().getLoc();
|
|
int64_t FunctionId, FileNumber;
|
|
if (parseCVFunctionId(FunctionId, ".cv_loc") ||
|
|
parseCVFileId(FileNumber, ".cv_loc"))
|
|
return true;
|
|
|
|
int64_t LineNumber = 0;
|
|
if (getLexer().is(AsmToken::Integer)) {
|
|
LineNumber = getTok().getIntVal();
|
|
if (LineNumber < 0)
|
|
return TokError("line number less than zero in '.cv_loc' directive");
|
|
Lex();
|
|
}
|
|
|
|
int64_t ColumnPos = 0;
|
|
if (getLexer().is(AsmToken::Integer)) {
|
|
ColumnPos = getTok().getIntVal();
|
|
if (ColumnPos < 0)
|
|
return TokError("column position less than zero in '.cv_loc' directive");
|
|
Lex();
|
|
}
|
|
|
|
bool PrologueEnd = false;
|
|
uint64_t IsStmt = 0;
|
|
|
|
auto parseOp = [&]() -> bool {
|
|
StringRef Name;
|
|
SMLoc Loc = getTok().getLoc();
|
|
if (parseIdentifier(Name))
|
|
return TokError("unexpected token in '.cv_loc' directive");
|
|
if (Name == "prologue_end")
|
|
PrologueEnd = true;
|
|
else if (Name == "is_stmt") {
|
|
Loc = getTok().getLoc();
|
|
const MCExpr *Value;
|
|
if (parseExpression(Value))
|
|
return true;
|
|
// The expression must be the constant 0 or 1.
|
|
IsStmt = ~0ULL;
|
|
if (const auto *MCE = dyn_cast<MCConstantExpr>(Value))
|
|
IsStmt = MCE->getValue();
|
|
|
|
if (IsStmt > 1)
|
|
return Error(Loc, "is_stmt value not 0 or 1");
|
|
} else {
|
|
return Error(Loc, "unknown sub-directive in '.cv_loc' directive");
|
|
}
|
|
return false;
|
|
};
|
|
|
|
if (parseMany(parseOp, false /*hasComma*/))
|
|
return true;
|
|
|
|
getStreamer().emitCVLocDirective(FunctionId, FileNumber, LineNumber,
|
|
ColumnPos, PrologueEnd, IsStmt, StringRef(),
|
|
DirectiveLoc);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCVLinetable
|
|
/// ::= .cv_linetable FunctionId, FnStart, FnEnd
|
|
bool AsmParser::parseDirectiveCVLinetable() {
|
|
int64_t FunctionId;
|
|
StringRef FnStartName, FnEndName;
|
|
SMLoc Loc = getTok().getLoc();
|
|
if (parseCVFunctionId(FunctionId, ".cv_linetable") ||
|
|
parseToken(AsmToken::Comma,
|
|
"unexpected token in '.cv_linetable' directive") ||
|
|
parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc,
|
|
"expected identifier in directive") ||
|
|
parseToken(AsmToken::Comma,
|
|
"unexpected token in '.cv_linetable' directive") ||
|
|
parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc,
|
|
"expected identifier in directive"))
|
|
return true;
|
|
|
|
MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
|
|
MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
|
|
|
|
getStreamer().emitCVLinetableDirective(FunctionId, FnStartSym, FnEndSym);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCVInlineLinetable
|
|
/// ::= .cv_inline_linetable PrimaryFunctionId FileId LineNum FnStart FnEnd
|
|
bool AsmParser::parseDirectiveCVInlineLinetable() {
|
|
int64_t PrimaryFunctionId, SourceFileId, SourceLineNum;
|
|
StringRef FnStartName, FnEndName;
|
|
SMLoc Loc = getTok().getLoc();
|
|
if (parseCVFunctionId(PrimaryFunctionId, ".cv_inline_linetable") ||
|
|
parseTokenLoc(Loc) ||
|
|
parseIntToken(
|
|
SourceFileId,
|
|
"expected SourceField in '.cv_inline_linetable' directive") ||
|
|
check(SourceFileId <= 0, Loc,
|
|
"File id less than zero in '.cv_inline_linetable' directive") ||
|
|
parseTokenLoc(Loc) ||
|
|
parseIntToken(
|
|
SourceLineNum,
|
|
"expected SourceLineNum in '.cv_inline_linetable' directive") ||
|
|
check(SourceLineNum < 0, Loc,
|
|
"Line number less than zero in '.cv_inline_linetable' directive") ||
|
|
parseTokenLoc(Loc) || check(parseIdentifier(FnStartName), Loc,
|
|
"expected identifier in directive") ||
|
|
parseTokenLoc(Loc) || check(parseIdentifier(FnEndName), Loc,
|
|
"expected identifier in directive"))
|
|
return true;
|
|
|
|
if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement"))
|
|
return true;
|
|
|
|
MCSymbol *FnStartSym = getContext().getOrCreateSymbol(FnStartName);
|
|
MCSymbol *FnEndSym = getContext().getOrCreateSymbol(FnEndName);
|
|
getStreamer().emitCVInlineLinetableDirective(PrimaryFunctionId, SourceFileId,
|
|
SourceLineNum, FnStartSym,
|
|
FnEndSym);
|
|
return false;
|
|
}
|
|
|
|
void AsmParser::initializeCVDefRangeTypeMap() {
|
|
CVDefRangeTypeMap["reg"] = CVDR_DEFRANGE_REGISTER;
|
|
CVDefRangeTypeMap["frame_ptr_rel"] = CVDR_DEFRANGE_FRAMEPOINTER_REL;
|
|
CVDefRangeTypeMap["subfield_reg"] = CVDR_DEFRANGE_SUBFIELD_REGISTER;
|
|
CVDefRangeTypeMap["reg_rel"] = CVDR_DEFRANGE_REGISTER_REL;
|
|
}
|
|
|
|
/// parseDirectiveCVDefRange
|
|
/// ::= .cv_def_range RangeStart RangeEnd (GapStart GapEnd)*, bytes*
|
|
bool AsmParser::parseDirectiveCVDefRange() {
|
|
SMLoc Loc;
|
|
std::vector<std::pair<const MCSymbol *, const MCSymbol *>> Ranges;
|
|
while (getLexer().is(AsmToken::Identifier)) {
|
|
Loc = getLexer().getLoc();
|
|
StringRef GapStartName;
|
|
if (parseIdentifier(GapStartName))
|
|
return Error(Loc, "expected identifier in directive");
|
|
MCSymbol *GapStartSym = getContext().getOrCreateSymbol(GapStartName);
|
|
|
|
Loc = getLexer().getLoc();
|
|
StringRef GapEndName;
|
|
if (parseIdentifier(GapEndName))
|
|
return Error(Loc, "expected identifier in directive");
|
|
MCSymbol *GapEndSym = getContext().getOrCreateSymbol(GapEndName);
|
|
|
|
Ranges.push_back({GapStartSym, GapEndSym});
|
|
}
|
|
|
|
StringRef CVDefRangeTypeStr;
|
|
if (parseToken(
|
|
AsmToken::Comma,
|
|
"expected comma before def_range type in .cv_def_range directive") ||
|
|
parseIdentifier(CVDefRangeTypeStr))
|
|
return Error(Loc, "expected def_range type in directive");
|
|
|
|
StringMap<CVDefRangeType>::const_iterator CVTypeIt =
|
|
CVDefRangeTypeMap.find(CVDefRangeTypeStr);
|
|
CVDefRangeType CVDRType = (CVTypeIt == CVDefRangeTypeMap.end())
|
|
? CVDR_DEFRANGE
|
|
: CVTypeIt->getValue();
|
|
switch (CVDRType) {
|
|
case CVDR_DEFRANGE_REGISTER: {
|
|
int64_t DRRegister;
|
|
if (parseToken(AsmToken::Comma, "expected comma before register number in "
|
|
".cv_def_range directive") ||
|
|
parseAbsoluteExpression(DRRegister))
|
|
return Error(Loc, "expected register number");
|
|
|
|
codeview::DefRangeRegisterHeader DRHdr;
|
|
DRHdr.Register = DRRegister;
|
|
DRHdr.MayHaveNoName = 0;
|
|
getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
|
|
break;
|
|
}
|
|
case CVDR_DEFRANGE_FRAMEPOINTER_REL: {
|
|
int64_t DROffset;
|
|
if (parseToken(AsmToken::Comma,
|
|
"expected comma before offset in .cv_def_range directive") ||
|
|
parseAbsoluteExpression(DROffset))
|
|
return Error(Loc, "expected offset value");
|
|
|
|
codeview::DefRangeFramePointerRelHeader DRHdr;
|
|
DRHdr.Offset = DROffset;
|
|
getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
|
|
break;
|
|
}
|
|
case CVDR_DEFRANGE_SUBFIELD_REGISTER: {
|
|
int64_t DRRegister;
|
|
int64_t DROffsetInParent;
|
|
if (parseToken(AsmToken::Comma, "expected comma before register number in "
|
|
".cv_def_range directive") ||
|
|
parseAbsoluteExpression(DRRegister))
|
|
return Error(Loc, "expected register number");
|
|
if (parseToken(AsmToken::Comma,
|
|
"expected comma before offset in .cv_def_range directive") ||
|
|
parseAbsoluteExpression(DROffsetInParent))
|
|
return Error(Loc, "expected offset value");
|
|
|
|
codeview::DefRangeSubfieldRegisterHeader DRHdr;
|
|
DRHdr.Register = DRRegister;
|
|
DRHdr.MayHaveNoName = 0;
|
|
DRHdr.OffsetInParent = DROffsetInParent;
|
|
getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
|
|
break;
|
|
}
|
|
case CVDR_DEFRANGE_REGISTER_REL: {
|
|
int64_t DRRegister;
|
|
int64_t DRFlags;
|
|
int64_t DRBasePointerOffset;
|
|
if (parseToken(AsmToken::Comma, "expected comma before register number in "
|
|
".cv_def_range directive") ||
|
|
parseAbsoluteExpression(DRRegister))
|
|
return Error(Loc, "expected register value");
|
|
if (parseToken(
|
|
AsmToken::Comma,
|
|
"expected comma before flag value in .cv_def_range directive") ||
|
|
parseAbsoluteExpression(DRFlags))
|
|
return Error(Loc, "expected flag value");
|
|
if (parseToken(AsmToken::Comma, "expected comma before base pointer offset "
|
|
"in .cv_def_range directive") ||
|
|
parseAbsoluteExpression(DRBasePointerOffset))
|
|
return Error(Loc, "expected base pointer offset value");
|
|
|
|
codeview::DefRangeRegisterRelHeader DRHdr;
|
|
DRHdr.Register = DRRegister;
|
|
DRHdr.Flags = DRFlags;
|
|
DRHdr.BasePointerOffset = DRBasePointerOffset;
|
|
getStreamer().emitCVDefRangeDirective(Ranges, DRHdr);
|
|
break;
|
|
}
|
|
default:
|
|
return Error(Loc, "unexpected def_range type in .cv_def_range directive");
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/// parseDirectiveCVString
|
|
/// ::= .cv_stringtable "string"
|
|
bool AsmParser::parseDirectiveCVString() {
|
|
std::string Data;
|
|
if (checkForValidSection() || parseEscapedString(Data))
|
|
return addErrorSuffix(" in '.cv_string' directive");
|
|
|
|
// Put the string in the table and emit the offset.
|
|
std::pair<StringRef, unsigned> Insertion =
|
|
getCVContext().addToStringTable(Data);
|
|
getStreamer().emitInt32(Insertion.second);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCVStringTable
|
|
/// ::= .cv_stringtable
|
|
bool AsmParser::parseDirectiveCVStringTable() {
|
|
getStreamer().emitCVStringTableDirective();
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCVFileChecksums
|
|
/// ::= .cv_filechecksums
|
|
bool AsmParser::parseDirectiveCVFileChecksums() {
|
|
getStreamer().emitCVFileChecksumsDirective();
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCVFileChecksumOffset
|
|
/// ::= .cv_filechecksumoffset fileno
|
|
bool AsmParser::parseDirectiveCVFileChecksumOffset() {
|
|
int64_t FileNo;
|
|
if (parseIntToken(FileNo, "expected identifier in directive"))
|
|
return true;
|
|
if (parseToken(AsmToken::EndOfStatement, "Expected End of Statement"))
|
|
return true;
|
|
getStreamer().emitCVFileChecksumOffsetDirective(FileNo);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCVFPOData
|
|
/// ::= .cv_fpo_data procsym
|
|
bool AsmParser::parseDirectiveCVFPOData() {
|
|
SMLoc DirLoc = getLexer().getLoc();
|
|
StringRef ProcName;
|
|
if (parseIdentifier(ProcName))
|
|
return TokError("expected symbol name");
|
|
if (parseEOL("unexpected tokens"))
|
|
return addErrorSuffix(" in '.cv_fpo_data' directive");
|
|
MCSymbol *ProcSym = getContext().getOrCreateSymbol(ProcName);
|
|
getStreamer().EmitCVFPOData(ProcSym, DirLoc);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFISections
|
|
/// ::= .cfi_sections section [, section]
|
|
bool AsmParser::parseDirectiveCFISections() {
|
|
StringRef Name;
|
|
bool EH = false;
|
|
bool Debug = false;
|
|
|
|
if (parseIdentifier(Name))
|
|
return TokError("Expected an identifier");
|
|
|
|
if (Name == ".eh_frame")
|
|
EH = true;
|
|
else if (Name == ".debug_frame")
|
|
Debug = true;
|
|
|
|
if (getLexer().is(AsmToken::Comma)) {
|
|
Lex();
|
|
|
|
if (parseIdentifier(Name))
|
|
return TokError("Expected an identifier");
|
|
|
|
if (Name == ".eh_frame")
|
|
EH = true;
|
|
else if (Name == ".debug_frame")
|
|
Debug = true;
|
|
}
|
|
|
|
getStreamer().emitCFISections(EH, Debug);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIStartProc
|
|
/// ::= .cfi_startproc [simple]
|
|
bool AsmParser::parseDirectiveCFIStartProc() {
|
|
StringRef Simple;
|
|
if (!parseOptionalToken(AsmToken::EndOfStatement)) {
|
|
if (check(parseIdentifier(Simple) || Simple != "simple",
|
|
"unexpected token") ||
|
|
parseToken(AsmToken::EndOfStatement))
|
|
return addErrorSuffix(" in '.cfi_startproc' directive");
|
|
}
|
|
|
|
// TODO(kristina): Deal with a corner case of incorrect diagnostic context
|
|
// being produced if this directive is emitted as part of preprocessor macro
|
|
// expansion which can *ONLY* happen if Clang's cc1as is the API consumer.
|
|
// Tools like llvm-mc on the other hand are not affected by it, and report
|
|
// correct context information.
|
|
getStreamer().emitCFIStartProc(!Simple.empty(), Lexer.getLoc());
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIEndProc
|
|
/// ::= .cfi_endproc
|
|
bool AsmParser::parseDirectiveCFIEndProc() {
|
|
getStreamer().emitCFIEndProc();
|
|
return false;
|
|
}
|
|
|
|
/// parse register name or number.
|
|
bool AsmParser::parseRegisterOrRegisterNumber(int64_t &Register,
|
|
SMLoc DirectiveLoc) {
|
|
unsigned RegNo;
|
|
|
|
if (getLexer().isNot(AsmToken::Integer)) {
|
|
if (getTargetParser().ParseRegister(RegNo, DirectiveLoc, DirectiveLoc))
|
|
return true;
|
|
Register = getContext().getRegisterInfo()->getDwarfRegNum(RegNo, true);
|
|
} else
|
|
return parseAbsoluteExpression(Register);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIDefCfa
|
|
/// ::= .cfi_def_cfa register, offset
|
|
bool AsmParser::parseDirectiveCFIDefCfa(SMLoc DirectiveLoc) {
|
|
int64_t Register = 0, Offset = 0;
|
|
if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) ||
|
|
parseToken(AsmToken::Comma, "unexpected token in directive") ||
|
|
parseAbsoluteExpression(Offset))
|
|
return true;
|
|
|
|
getStreamer().emitCFIDefCfa(Register, Offset);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIDefCfaOffset
|
|
/// ::= .cfi_def_cfa_offset offset
|
|
bool AsmParser::parseDirectiveCFIDefCfaOffset() {
|
|
int64_t Offset = 0;
|
|
if (parseAbsoluteExpression(Offset))
|
|
return true;
|
|
|
|
getStreamer().emitCFIDefCfaOffset(Offset);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIRegister
|
|
/// ::= .cfi_register register, register
|
|
bool AsmParser::parseDirectiveCFIRegister(SMLoc DirectiveLoc) {
|
|
int64_t Register1 = 0, Register2 = 0;
|
|
if (parseRegisterOrRegisterNumber(Register1, DirectiveLoc) ||
|
|
parseToken(AsmToken::Comma, "unexpected token in directive") ||
|
|
parseRegisterOrRegisterNumber(Register2, DirectiveLoc))
|
|
return true;
|
|
|
|
getStreamer().emitCFIRegister(Register1, Register2);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIWindowSave
|
|
/// ::= .cfi_window_save
|
|
bool AsmParser::parseDirectiveCFIWindowSave() {
|
|
getStreamer().emitCFIWindowSave();
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIAdjustCfaOffset
|
|
/// ::= .cfi_adjust_cfa_offset adjustment
|
|
bool AsmParser::parseDirectiveCFIAdjustCfaOffset() {
|
|
int64_t Adjustment = 0;
|
|
if (parseAbsoluteExpression(Adjustment))
|
|
return true;
|
|
|
|
getStreamer().emitCFIAdjustCfaOffset(Adjustment);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIDefCfaRegister
|
|
/// ::= .cfi_def_cfa_register register
|
|
bool AsmParser::parseDirectiveCFIDefCfaRegister(SMLoc DirectiveLoc) {
|
|
int64_t Register = 0;
|
|
if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
|
|
return true;
|
|
|
|
getStreamer().emitCFIDefCfaRegister(Register);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIOffset
|
|
/// ::= .cfi_offset register, offset
|
|
bool AsmParser::parseDirectiveCFIOffset(SMLoc DirectiveLoc) {
|
|
int64_t Register = 0;
|
|
int64_t Offset = 0;
|
|
|
|
if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) ||
|
|
parseToken(AsmToken::Comma, "unexpected token in directive") ||
|
|
parseAbsoluteExpression(Offset))
|
|
return true;
|
|
|
|
getStreamer().emitCFIOffset(Register, Offset);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIRelOffset
|
|
/// ::= .cfi_rel_offset register, offset
|
|
bool AsmParser::parseDirectiveCFIRelOffset(SMLoc DirectiveLoc) {
|
|
int64_t Register = 0, Offset = 0;
|
|
|
|
if (parseRegisterOrRegisterNumber(Register, DirectiveLoc) ||
|
|
parseToken(AsmToken::Comma, "unexpected token in directive") ||
|
|
parseAbsoluteExpression(Offset))
|
|
return true;
|
|
|
|
getStreamer().emitCFIRelOffset(Register, Offset);
|
|
return false;
|
|
}
|
|
|
|
static bool isValidEncoding(int64_t Encoding) {
|
|
if (Encoding & ~0xff)
|
|
return false;
|
|
|
|
if (Encoding == dwarf::DW_EH_PE_omit)
|
|
return true;
|
|
|
|
const unsigned Format = Encoding & 0xf;
|
|
if (Format != dwarf::DW_EH_PE_absptr && Format != dwarf::DW_EH_PE_udata2 &&
|
|
Format != dwarf::DW_EH_PE_udata4 && Format != dwarf::DW_EH_PE_udata8 &&
|
|
Format != dwarf::DW_EH_PE_sdata2 && Format != dwarf::DW_EH_PE_sdata4 &&
|
|
Format != dwarf::DW_EH_PE_sdata8 && Format != dwarf::DW_EH_PE_signed)
|
|
return false;
|
|
|
|
const unsigned Application = Encoding & 0x70;
|
|
if (Application != dwarf::DW_EH_PE_absptr &&
|
|
Application != dwarf::DW_EH_PE_pcrel)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/// parseDirectiveCFIPersonalityOrLsda
|
|
/// IsPersonality true for cfi_personality, false for cfi_lsda
|
|
/// ::= .cfi_personality encoding, [symbol_name]
|
|
/// ::= .cfi_lsda encoding, [symbol_name]
|
|
bool AsmParser::parseDirectiveCFIPersonalityOrLsda(bool IsPersonality) {
|
|
int64_t Encoding = 0;
|
|
if (parseAbsoluteExpression(Encoding))
|
|
return true;
|
|
if (Encoding == dwarf::DW_EH_PE_omit)
|
|
return false;
|
|
|
|
StringRef Name;
|
|
if (check(!isValidEncoding(Encoding), "unsupported encoding.") ||
|
|
parseToken(AsmToken::Comma, "unexpected token in directive") ||
|
|
check(parseIdentifier(Name), "expected identifier in directive"))
|
|
return true;
|
|
|
|
MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
|
|
|
|
if (IsPersonality)
|
|
getStreamer().emitCFIPersonality(Sym, Encoding);
|
|
else
|
|
getStreamer().emitCFILsda(Sym, Encoding);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIRememberState
|
|
/// ::= .cfi_remember_state
|
|
bool AsmParser::parseDirectiveCFIRememberState() {
|
|
getStreamer().emitCFIRememberState();
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIRestoreState
|
|
/// ::= .cfi_remember_state
|
|
bool AsmParser::parseDirectiveCFIRestoreState() {
|
|
getStreamer().emitCFIRestoreState();
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFISameValue
|
|
/// ::= .cfi_same_value register
|
|
bool AsmParser::parseDirectiveCFISameValue(SMLoc DirectiveLoc) {
|
|
int64_t Register = 0;
|
|
|
|
if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
|
|
return true;
|
|
|
|
getStreamer().emitCFISameValue(Register);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIRestore
|
|
/// ::= .cfi_restore register
|
|
bool AsmParser::parseDirectiveCFIRestore(SMLoc DirectiveLoc) {
|
|
int64_t Register = 0;
|
|
if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
|
|
return true;
|
|
|
|
getStreamer().emitCFIRestore(Register);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIEscape
|
|
/// ::= .cfi_escape expression[,...]
|
|
bool AsmParser::parseDirectiveCFIEscape() {
|
|
std::string Values;
|
|
int64_t CurrValue;
|
|
if (parseAbsoluteExpression(CurrValue))
|
|
return true;
|
|
|
|
Values.push_back((uint8_t)CurrValue);
|
|
|
|
while (getLexer().is(AsmToken::Comma)) {
|
|
Lex();
|
|
|
|
if (parseAbsoluteExpression(CurrValue))
|
|
return true;
|
|
|
|
Values.push_back((uint8_t)CurrValue);
|
|
}
|
|
|
|
getStreamer().emitCFIEscape(Values);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIReturnColumn
|
|
/// ::= .cfi_return_column register
|
|
bool AsmParser::parseDirectiveCFIReturnColumn(SMLoc DirectiveLoc) {
|
|
int64_t Register = 0;
|
|
if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
|
|
return true;
|
|
getStreamer().emitCFIReturnColumn(Register);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFISignalFrame
|
|
/// ::= .cfi_signal_frame
|
|
bool AsmParser::parseDirectiveCFISignalFrame() {
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.cfi_signal_frame'"))
|
|
return true;
|
|
|
|
getStreamer().emitCFISignalFrame();
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveCFIUndefined
|
|
/// ::= .cfi_undefined register
|
|
bool AsmParser::parseDirectiveCFIUndefined(SMLoc DirectiveLoc) {
|
|
int64_t Register = 0;
|
|
|
|
if (parseRegisterOrRegisterNumber(Register, DirectiveLoc))
|
|
return true;
|
|
|
|
getStreamer().emitCFIUndefined(Register);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveAltmacro
|
|
/// ::= .altmacro
|
|
/// ::= .noaltmacro
|
|
bool AsmParser::parseDirectiveAltmacro(StringRef Directive) {
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '" + Directive + "' directive");
|
|
AltMacroMode = (Directive == ".altmacro");
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveMacrosOnOff
|
|
/// ::= .macros_on
|
|
/// ::= .macros_off
|
|
bool AsmParser::parseDirectiveMacrosOnOff(StringRef Directive) {
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '" + Directive + "' directive"))
|
|
return true;
|
|
|
|
setMacrosEnabled(Directive == ".macros_on");
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveMacro
|
|
/// ::= .macro name[,] [parameters]
|
|
bool AsmParser::parseDirectiveMacro(SMLoc DirectiveLoc) {
|
|
StringRef Name;
|
|
if (parseIdentifier(Name))
|
|
return TokError("expected identifier in '.macro' directive");
|
|
|
|
if (getLexer().is(AsmToken::Comma))
|
|
Lex();
|
|
|
|
MCAsmMacroParameters Parameters;
|
|
while (getLexer().isNot(AsmToken::EndOfStatement)) {
|
|
|
|
if (!Parameters.empty() && Parameters.back().Vararg)
|
|
return Error(Lexer.getLoc(), "vararg parameter '" +
|
|
Parameters.back().Name +
|
|
"' should be the last parameter");
|
|
|
|
MCAsmMacroParameter Parameter;
|
|
if (parseIdentifier(Parameter.Name))
|
|
return TokError("expected identifier in '.macro' directive");
|
|
|
|
// Emit an error if two (or more) named parameters share the same name
|
|
for (const MCAsmMacroParameter& CurrParam : Parameters)
|
|
if (CurrParam.Name.equals(Parameter.Name))
|
|
return TokError("macro '" + Name + "' has multiple parameters"
|
|
" named '" + Parameter.Name + "'");
|
|
|
|
if (Lexer.is(AsmToken::Colon)) {
|
|
Lex(); // consume ':'
|
|
|
|
SMLoc QualLoc;
|
|
StringRef Qualifier;
|
|
|
|
QualLoc = Lexer.getLoc();
|
|
if (parseIdentifier(Qualifier))
|
|
return Error(QualLoc, "missing parameter qualifier for "
|
|
"'" + Parameter.Name + "' in macro '" + Name + "'");
|
|
|
|
if (Qualifier == "req")
|
|
Parameter.Required = true;
|
|
else if (Qualifier == "vararg")
|
|
Parameter.Vararg = true;
|
|
else
|
|
return Error(QualLoc, Qualifier + " is not a valid parameter qualifier "
|
|
"for '" + Parameter.Name + "' in macro '" + Name + "'");
|
|
}
|
|
|
|
if (getLexer().is(AsmToken::Equal)) {
|
|
Lex();
|
|
|
|
SMLoc ParamLoc;
|
|
|
|
ParamLoc = Lexer.getLoc();
|
|
if (parseMacroArgument(Parameter.Value, /*Vararg=*/false ))
|
|
return true;
|
|
|
|
if (Parameter.Required)
|
|
Warning(ParamLoc, "pointless default value for required parameter "
|
|
"'" + Parameter.Name + "' in macro '" + Name + "'");
|
|
}
|
|
|
|
Parameters.push_back(std::move(Parameter));
|
|
|
|
if (getLexer().is(AsmToken::Comma))
|
|
Lex();
|
|
}
|
|
|
|
// Eat just the end of statement.
|
|
Lexer.Lex();
|
|
|
|
// Consuming deferred text, so use Lexer.Lex to ignore Lexing Errors
|
|
AsmToken EndToken, StartToken = getTok();
|
|
unsigned MacroDepth = 0;
|
|
// Lex the macro definition.
|
|
while (true) {
|
|
// Ignore Lexing errors in macros.
|
|
while (Lexer.is(AsmToken::Error)) {
|
|
Lexer.Lex();
|
|
}
|
|
|
|
// Check whether we have reached the end of the file.
|
|
if (getLexer().is(AsmToken::Eof))
|
|
return Error(DirectiveLoc, "no matching '.endmacro' in definition");
|
|
|
|
// Otherwise, check whether we have reach the .endmacro or the start of a
|
|
// preprocessor line marker.
|
|
if (getLexer().is(AsmToken::Identifier)) {
|
|
if (getTok().getIdentifier() == ".endm" ||
|
|
getTok().getIdentifier() == ".endmacro") {
|
|
if (MacroDepth == 0) { // Outermost macro.
|
|
EndToken = getTok();
|
|
Lexer.Lex();
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '" + EndToken.getIdentifier() +
|
|
"' directive");
|
|
break;
|
|
} else {
|
|
// Otherwise we just found the end of an inner macro.
|
|
--MacroDepth;
|
|
}
|
|
} else if (getTok().getIdentifier() == ".macro") {
|
|
// We allow nested macros. Those aren't instantiated until the outermost
|
|
// macro is expanded so just ignore them for now.
|
|
++MacroDepth;
|
|
}
|
|
} else if (Lexer.is(AsmToken::HashDirective)) {
|
|
(void)parseCppHashLineFilenameComment(getLexer().getLoc());
|
|
}
|
|
|
|
// Otherwise, scan til the end of the statement.
|
|
eatToEndOfStatement();
|
|
}
|
|
|
|
if (getContext().lookupMacro(Name)) {
|
|
return Error(DirectiveLoc, "macro '" + Name + "' is already defined");
|
|
}
|
|
|
|
const char *BodyStart = StartToken.getLoc().getPointer();
|
|
const char *BodyEnd = EndToken.getLoc().getPointer();
|
|
StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
|
|
checkForBadMacro(DirectiveLoc, Name, Body, Parameters);
|
|
MCAsmMacro Macro(Name, Body, std::move(Parameters));
|
|
DEBUG_WITH_TYPE("asm-macros", dbgs() << "Defining new macro:\n";
|
|
Macro.dump());
|
|
getContext().defineMacro(Name, std::move(Macro));
|
|
return false;
|
|
}
|
|
|
|
/// checkForBadMacro
|
|
///
|
|
/// With the support added for named parameters there may be code out there that
|
|
/// is transitioning from positional parameters. In versions of gas that did
|
|
/// not support named parameters they would be ignored on the macro definition.
|
|
/// But to support both styles of parameters this is not possible so if a macro
|
|
/// definition has named parameters but does not use them and has what appears
|
|
/// to be positional parameters, strings like $1, $2, ... and $n, then issue a
|
|
/// warning that the positional parameter found in body which have no effect.
|
|
/// Hoping the developer will either remove the named parameters from the macro
|
|
/// definition so the positional parameters get used if that was what was
|
|
/// intended or change the macro to use the named parameters. It is possible
|
|
/// this warning will trigger when the none of the named parameters are used
|
|
/// and the strings like $1 are infact to simply to be passed trough unchanged.
|
|
void AsmParser::checkForBadMacro(SMLoc DirectiveLoc, StringRef Name,
|
|
StringRef Body,
|
|
ArrayRef<MCAsmMacroParameter> Parameters) {
|
|
// If this macro is not defined with named parameters the warning we are
|
|
// checking for here doesn't apply.
|
|
unsigned NParameters = Parameters.size();
|
|
if (NParameters == 0)
|
|
return;
|
|
|
|
bool NamedParametersFound = false;
|
|
bool PositionalParametersFound = false;
|
|
|
|
// Look at the body of the macro for use of both the named parameters and what
|
|
// are likely to be positional parameters. This is what expandMacro() is
|
|
// doing when it finds the parameters in the body.
|
|
while (!Body.empty()) {
|
|
// Scan for the next possible parameter.
|
|
std::size_t End = Body.size(), Pos = 0;
|
|
for (; Pos != End; ++Pos) {
|
|
// Check for a substitution or escape.
|
|
// This macro is defined with parameters, look for \foo, \bar, etc.
|
|
if (Body[Pos] == '\\' && Pos + 1 != End)
|
|
break;
|
|
|
|
// This macro should have parameters, but look for $0, $1, ..., $n too.
|
|
if (Body[Pos] != '$' || Pos + 1 == End)
|
|
continue;
|
|
char Next = Body[Pos + 1];
|
|
if (Next == '$' || Next == 'n' ||
|
|
isdigit(static_cast<unsigned char>(Next)))
|
|
break;
|
|
}
|
|
|
|
// Check if we reached the end.
|
|
if (Pos == End)
|
|
break;
|
|
|
|
if (Body[Pos] == '$') {
|
|
switch (Body[Pos + 1]) {
|
|
// $$ => $
|
|
case '$':
|
|
break;
|
|
|
|
// $n => number of arguments
|
|
case 'n':
|
|
PositionalParametersFound = true;
|
|
break;
|
|
|
|
// $[0-9] => argument
|
|
default: {
|
|
PositionalParametersFound = true;
|
|
break;
|
|
}
|
|
}
|
|
Pos += 2;
|
|
} else {
|
|
unsigned I = Pos + 1;
|
|
while (isIdentifierChar(Body[I]) && I + 1 != End)
|
|
++I;
|
|
|
|
const char *Begin = Body.data() + Pos + 1;
|
|
StringRef Argument(Begin, I - (Pos + 1));
|
|
unsigned Index = 0;
|
|
for (; Index < NParameters; ++Index)
|
|
if (Parameters[Index].Name == Argument)
|
|
break;
|
|
|
|
if (Index == NParameters) {
|
|
if (Body[Pos + 1] == '(' && Body[Pos + 2] == ')')
|
|
Pos += 3;
|
|
else {
|
|
Pos = I;
|
|
}
|
|
} else {
|
|
NamedParametersFound = true;
|
|
Pos += 1 + Argument.size();
|
|
}
|
|
}
|
|
// Update the scan point.
|
|
Body = Body.substr(Pos);
|
|
}
|
|
|
|
if (!NamedParametersFound && PositionalParametersFound)
|
|
Warning(DirectiveLoc, "macro defined with named parameters which are not "
|
|
"used in macro body, possible positional parameter "
|
|
"found in body which will have no effect");
|
|
}
|
|
|
|
/// parseDirectiveExitMacro
|
|
/// ::= .exitm
|
|
bool AsmParser::parseDirectiveExitMacro(StringRef Directive) {
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '" + Directive + "' directive"))
|
|
return true;
|
|
|
|
if (!isInsideMacroInstantiation())
|
|
return TokError("unexpected '" + Directive + "' in file, "
|
|
"no current macro definition");
|
|
|
|
// Exit all conditionals that are active in the current macro.
|
|
while (TheCondStack.size() != ActiveMacros.back()->CondStackDepth) {
|
|
TheCondState = TheCondStack.back();
|
|
TheCondStack.pop_back();
|
|
}
|
|
|
|
handleMacroExit();
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveEndMacro
|
|
/// ::= .endm
|
|
/// ::= .endmacro
|
|
bool AsmParser::parseDirectiveEndMacro(StringRef Directive) {
|
|
if (getLexer().isNot(AsmToken::EndOfStatement))
|
|
return TokError("unexpected token in '" + Directive + "' directive");
|
|
|
|
// If we are inside a macro instantiation, terminate the current
|
|
// instantiation.
|
|
if (isInsideMacroInstantiation()) {
|
|
handleMacroExit();
|
|
return false;
|
|
}
|
|
|
|
// Otherwise, this .endmacro is a stray entry in the file; well formed
|
|
// .endmacro directives are handled during the macro definition parsing.
|
|
return TokError("unexpected '" + Directive + "' in file, "
|
|
"no current macro definition");
|
|
}
|
|
|
|
/// parseDirectivePurgeMacro
|
|
/// ::= .purgem
|
|
bool AsmParser::parseDirectivePurgeMacro(SMLoc DirectiveLoc) {
|
|
StringRef Name;
|
|
SMLoc Loc;
|
|
if (parseTokenLoc(Loc) ||
|
|
check(parseIdentifier(Name), Loc,
|
|
"expected identifier in '.purgem' directive") ||
|
|
parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.purgem' directive"))
|
|
return true;
|
|
|
|
if (!getContext().lookupMacro(Name))
|
|
return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
|
|
|
|
getContext().undefineMacro(Name);
|
|
DEBUG_WITH_TYPE("asm-macros", dbgs()
|
|
<< "Un-defining macro: " << Name << "\n");
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveBundleAlignMode
|
|
/// ::= {.bundle_align_mode} expression
|
|
bool AsmParser::parseDirectiveBundleAlignMode() {
|
|
// Expect a single argument: an expression that evaluates to a constant
|
|
// in the inclusive range 0-30.
|
|
SMLoc ExprLoc = getLexer().getLoc();
|
|
int64_t AlignSizePow2;
|
|
if (checkForValidSection() || parseAbsoluteExpression(AlignSizePow2) ||
|
|
parseToken(AsmToken::EndOfStatement, "unexpected token after expression "
|
|
"in '.bundle_align_mode' "
|
|
"directive") ||
|
|
check(AlignSizePow2 < 0 || AlignSizePow2 > 30, ExprLoc,
|
|
"invalid bundle alignment size (expected between 0 and 30)"))
|
|
return true;
|
|
|
|
// Because of AlignSizePow2's verified range we can safely truncate it to
|
|
// unsigned.
|
|
getStreamer().emitBundleAlignMode(static_cast<unsigned>(AlignSizePow2));
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveBundleLock
|
|
/// ::= {.bundle_lock} [align_to_end]
|
|
bool AsmParser::parseDirectiveBundleLock() {
|
|
if (checkForValidSection())
|
|
return true;
|
|
bool AlignToEnd = false;
|
|
|
|
StringRef Option;
|
|
SMLoc Loc = getTok().getLoc();
|
|
const char *kInvalidOptionError =
|
|
"invalid option for '.bundle_lock' directive";
|
|
|
|
if (!parseOptionalToken(AsmToken::EndOfStatement)) {
|
|
if (check(parseIdentifier(Option), Loc, kInvalidOptionError) ||
|
|
check(Option != "align_to_end", Loc, kInvalidOptionError) ||
|
|
parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token after '.bundle_lock' directive option"))
|
|
return true;
|
|
AlignToEnd = true;
|
|
}
|
|
|
|
getStreamer().emitBundleLock(AlignToEnd);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveBundleLock
|
|
/// ::= {.bundle_lock}
|
|
bool AsmParser::parseDirectiveBundleUnlock() {
|
|
if (checkForValidSection() ||
|
|
parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.bundle_unlock' directive"))
|
|
return true;
|
|
|
|
getStreamer().emitBundleUnlock();
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveSpace
|
|
/// ::= (.skip | .space) expression [ , expression ]
|
|
bool AsmParser::parseDirectiveSpace(StringRef IDVal) {
|
|
SMLoc NumBytesLoc = Lexer.getLoc();
|
|
const MCExpr *NumBytes;
|
|
if (checkForValidSection() || parseExpression(NumBytes))
|
|
return true;
|
|
|
|
int64_t FillExpr = 0;
|
|
if (parseOptionalToken(AsmToken::Comma))
|
|
if (parseAbsoluteExpression(FillExpr))
|
|
return addErrorSuffix("in '" + Twine(IDVal) + "' directive");
|
|
if (parseToken(AsmToken::EndOfStatement))
|
|
return addErrorSuffix("in '" + Twine(IDVal) + "' directive");
|
|
|
|
// FIXME: Sometimes the fill expr is 'nop' if it isn't supplied, instead of 0.
|
|
getStreamer().emitFill(*NumBytes, FillExpr, NumBytesLoc);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveDCB
|
|
/// ::= .dcb.{b, l, w} expression, expression
|
|
bool AsmParser::parseDirectiveDCB(StringRef IDVal, unsigned Size) {
|
|
SMLoc NumValuesLoc = Lexer.getLoc();
|
|
int64_t NumValues;
|
|
if (checkForValidSection() || parseAbsoluteExpression(NumValues))
|
|
return true;
|
|
|
|
if (NumValues < 0) {
|
|
Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
|
|
return false;
|
|
}
|
|
|
|
if (parseToken(AsmToken::Comma,
|
|
"unexpected token in '" + Twine(IDVal) + "' directive"))
|
|
return true;
|
|
|
|
const MCExpr *Value;
|
|
SMLoc ExprLoc = getLexer().getLoc();
|
|
if (parseExpression(Value))
|
|
return true;
|
|
|
|
// Special case constant expressions to match code generator.
|
|
if (const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value)) {
|
|
assert(Size <= 8 && "Invalid size");
|
|
uint64_t IntValue = MCE->getValue();
|
|
if (!isUIntN(8 * Size, IntValue) && !isIntN(8 * Size, IntValue))
|
|
return Error(ExprLoc, "literal value out of range for directive");
|
|
for (uint64_t i = 0, e = NumValues; i != e; ++i)
|
|
getStreamer().emitIntValue(IntValue, Size);
|
|
} else {
|
|
for (uint64_t i = 0, e = NumValues; i != e; ++i)
|
|
getStreamer().emitValue(Value, Size, ExprLoc);
|
|
}
|
|
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '" + Twine(IDVal) + "' directive"))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveRealDCB
|
|
/// ::= .dcb.{d, s} expression, expression
|
|
bool AsmParser::parseDirectiveRealDCB(StringRef IDVal, const fltSemantics &Semantics) {
|
|
SMLoc NumValuesLoc = Lexer.getLoc();
|
|
int64_t NumValues;
|
|
if (checkForValidSection() || parseAbsoluteExpression(NumValues))
|
|
return true;
|
|
|
|
if (NumValues < 0) {
|
|
Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
|
|
return false;
|
|
}
|
|
|
|
if (parseToken(AsmToken::Comma,
|
|
"unexpected token in '" + Twine(IDVal) + "' directive"))
|
|
return true;
|
|
|
|
APInt AsInt;
|
|
if (parseRealValue(Semantics, AsInt))
|
|
return true;
|
|
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '" + Twine(IDVal) + "' directive"))
|
|
return true;
|
|
|
|
for (uint64_t i = 0, e = NumValues; i != e; ++i)
|
|
getStreamer().emitIntValue(AsInt.getLimitedValue(),
|
|
AsInt.getBitWidth() / 8);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveDS
|
|
/// ::= .ds.{b, d, l, p, s, w, x} expression
|
|
bool AsmParser::parseDirectiveDS(StringRef IDVal, unsigned Size) {
|
|
SMLoc NumValuesLoc = Lexer.getLoc();
|
|
int64_t NumValues;
|
|
if (checkForValidSection() || parseAbsoluteExpression(NumValues))
|
|
return true;
|
|
|
|
if (NumValues < 0) {
|
|
Warning(NumValuesLoc, "'" + Twine(IDVal) + "' directive with negative repeat count has no effect");
|
|
return false;
|
|
}
|
|
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '" + Twine(IDVal) + "' directive"))
|
|
return true;
|
|
|
|
for (uint64_t i = 0, e = NumValues; i != e; ++i)
|
|
getStreamer().emitFill(Size, 0);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveLEB128
|
|
/// ::= (.sleb128 | .uleb128) [ expression (, expression)* ]
|
|
bool AsmParser::parseDirectiveLEB128(bool Signed) {
|
|
if (checkForValidSection())
|
|
return true;
|
|
|
|
auto parseOp = [&]() -> bool {
|
|
const MCExpr *Value;
|
|
if (parseExpression(Value))
|
|
return true;
|
|
if (Signed)
|
|
getStreamer().emitSLEB128Value(Value);
|
|
else
|
|
getStreamer().emitULEB128Value(Value);
|
|
return false;
|
|
};
|
|
|
|
if (parseMany(parseOp))
|
|
return addErrorSuffix(" in directive");
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveSymbolAttribute
|
|
/// ::= { ".globl", ".weak", ... } [ identifier ( , identifier )* ]
|
|
bool AsmParser::parseDirectiveSymbolAttribute(MCSymbolAttr Attr) {
|
|
auto parseOp = [&]() -> bool {
|
|
StringRef Name;
|
|
SMLoc Loc = getTok().getLoc();
|
|
if (parseIdentifier(Name))
|
|
return Error(Loc, "expected identifier");
|
|
MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
|
|
|
|
// Assembler local symbols don't make any sense here. Complain loudly.
|
|
if (Sym->isTemporary())
|
|
return Error(Loc, "non-local symbol required");
|
|
|
|
if (!getStreamer().emitSymbolAttribute(Sym, Attr))
|
|
return Error(Loc, "unable to emit symbol attribute");
|
|
return false;
|
|
};
|
|
|
|
if (parseMany(parseOp))
|
|
return addErrorSuffix(" in directive");
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveComm
|
|
/// ::= ( .comm | .lcomm ) identifier , size_expression [ , align_expression ]
|
|
bool AsmParser::parseDirectiveComm(bool IsLocal) {
|
|
if (checkForValidSection())
|
|
return true;
|
|
|
|
SMLoc IDLoc = getLexer().getLoc();
|
|
StringRef Name;
|
|
if (parseIdentifier(Name))
|
|
return TokError("expected identifier in directive");
|
|
|
|
// Handle the identifier as the key symbol.
|
|
MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
|
|
|
|
if (getLexer().isNot(AsmToken::Comma))
|
|
return TokError("unexpected token in directive");
|
|
Lex();
|
|
|
|
int64_t Size;
|
|
SMLoc SizeLoc = getLexer().getLoc();
|
|
if (parseAbsoluteExpression(Size))
|
|
return true;
|
|
|
|
int64_t Pow2Alignment = 0;
|
|
SMLoc Pow2AlignmentLoc;
|
|
if (getLexer().is(AsmToken::Comma)) {
|
|
Lex();
|
|
Pow2AlignmentLoc = getLexer().getLoc();
|
|
if (parseAbsoluteExpression(Pow2Alignment))
|
|
return true;
|
|
|
|
LCOMM::LCOMMType LCOMM = Lexer.getMAI().getLCOMMDirectiveAlignmentType();
|
|
if (IsLocal && LCOMM == LCOMM::NoAlignment)
|
|
return Error(Pow2AlignmentLoc, "alignment not supported on this target");
|
|
|
|
// If this target takes alignments in bytes (not log) validate and convert.
|
|
if ((!IsLocal && Lexer.getMAI().getCOMMDirectiveAlignmentIsInBytes()) ||
|
|
(IsLocal && LCOMM == LCOMM::ByteAlignment)) {
|
|
if (!isPowerOf2_64(Pow2Alignment))
|
|
return Error(Pow2AlignmentLoc, "alignment must be a power of 2");
|
|
Pow2Alignment = Log2_64(Pow2Alignment);
|
|
}
|
|
}
|
|
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.comm' or '.lcomm' directive"))
|
|
return true;
|
|
|
|
// NOTE: a size of zero for a .comm should create a undefined symbol
|
|
// but a size of .lcomm creates a bss symbol of size zero.
|
|
if (Size < 0)
|
|
return Error(SizeLoc, "invalid '.comm' or '.lcomm' directive size, can't "
|
|
"be less than zero");
|
|
|
|
// NOTE: The alignment in the directive is a power of 2 value, the assembler
|
|
// may internally end up wanting an alignment in bytes.
|
|
// FIXME: Diagnose overflow.
|
|
if (Pow2Alignment < 0)
|
|
return Error(Pow2AlignmentLoc, "invalid '.comm' or '.lcomm' directive "
|
|
"alignment, can't be less than zero");
|
|
|
|
Sym->redefineIfPossible();
|
|
if (!Sym->isUndefined())
|
|
return Error(IDLoc, "invalid symbol redefinition");
|
|
|
|
// Create the Symbol as a common or local common with Size and Pow2Alignment
|
|
if (IsLocal) {
|
|
getStreamer().emitLocalCommonSymbol(Sym, Size, 1 << Pow2Alignment);
|
|
return false;
|
|
}
|
|
|
|
getStreamer().emitCommonSymbol(Sym, Size, 1 << Pow2Alignment);
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveAbort
|
|
/// ::= .abort [... message ...]
|
|
bool AsmParser::parseDirectiveAbort() {
|
|
// FIXME: Use loc from directive.
|
|
SMLoc Loc = getLexer().getLoc();
|
|
|
|
StringRef Str = parseStringToEndOfStatement();
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.abort' directive"))
|
|
return true;
|
|
|
|
if (Str.empty())
|
|
return Error(Loc, ".abort detected. Assembly stopping.");
|
|
else
|
|
return Error(Loc, ".abort '" + Str + "' detected. Assembly stopping.");
|
|
// FIXME: Actually abort assembly here.
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveInclude
|
|
/// ::= .include "filename"
|
|
bool AsmParser::parseDirectiveInclude() {
|
|
// Allow the strings to have escaped octal character sequence.
|
|
std::string Filename;
|
|
SMLoc IncludeLoc = getTok().getLoc();
|
|
|
|
if (check(getTok().isNot(AsmToken::String),
|
|
"expected string in '.include' directive") ||
|
|
parseEscapedString(Filename) ||
|
|
check(getTok().isNot(AsmToken::EndOfStatement),
|
|
"unexpected token in '.include' directive") ||
|
|
// Attempt to switch the lexer to the included file before consuming the
|
|
// end of statement to avoid losing it when we switch.
|
|
check(enterIncludeFile(Filename), IncludeLoc,
|
|
"Could not find include file '" + Filename + "'"))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveIncbin
|
|
/// ::= .incbin "filename" [ , skip [ , count ] ]
|
|
bool AsmParser::parseDirectiveIncbin() {
|
|
// Allow the strings to have escaped octal character sequence.
|
|
std::string Filename;
|
|
SMLoc IncbinLoc = getTok().getLoc();
|
|
if (check(getTok().isNot(AsmToken::String),
|
|
"expected string in '.incbin' directive") ||
|
|
parseEscapedString(Filename))
|
|
return true;
|
|
|
|
int64_t Skip = 0;
|
|
const MCExpr *Count = nullptr;
|
|
SMLoc SkipLoc, CountLoc;
|
|
if (parseOptionalToken(AsmToken::Comma)) {
|
|
// The skip expression can be omitted while specifying the count, e.g:
|
|
// .incbin "filename",,4
|
|
if (getTok().isNot(AsmToken::Comma)) {
|
|
if (parseTokenLoc(SkipLoc) || parseAbsoluteExpression(Skip))
|
|
return true;
|
|
}
|
|
if (parseOptionalToken(AsmToken::Comma)) {
|
|
CountLoc = getTok().getLoc();
|
|
if (parseExpression(Count))
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.incbin' directive"))
|
|
return true;
|
|
|
|
if (check(Skip < 0, SkipLoc, "skip is negative"))
|
|
return true;
|
|
|
|
// Attempt to process the included file.
|
|
if (processIncbinFile(Filename, Skip, Count, CountLoc))
|
|
return Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveIf
|
|
/// ::= .if{,eq,ge,gt,le,lt,ne} expression
|
|
bool AsmParser::parseDirectiveIf(SMLoc DirectiveLoc, DirectiveKind DirKind) {
|
|
TheCondStack.push_back(TheCondState);
|
|
TheCondState.TheCond = AsmCond::IfCond;
|
|
if (TheCondState.Ignore) {
|
|
eatToEndOfStatement();
|
|
} else {
|
|
int64_t ExprValue;
|
|
if (parseAbsoluteExpression(ExprValue) ||
|
|
parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.if' directive"))
|
|
return true;
|
|
|
|
switch (DirKind) {
|
|
default:
|
|
llvm_unreachable("unsupported directive");
|
|
case DK_IF:
|
|
case DK_IFNE:
|
|
break;
|
|
case DK_IFEQ:
|
|
ExprValue = ExprValue == 0;
|
|
break;
|
|
case DK_IFGE:
|
|
ExprValue = ExprValue >= 0;
|
|
break;
|
|
case DK_IFGT:
|
|
ExprValue = ExprValue > 0;
|
|
break;
|
|
case DK_IFLE:
|
|
ExprValue = ExprValue <= 0;
|
|
break;
|
|
case DK_IFLT:
|
|
ExprValue = ExprValue < 0;
|
|
break;
|
|
}
|
|
|
|
TheCondState.CondMet = ExprValue;
|
|
TheCondState.Ignore = !TheCondState.CondMet;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveIfb
|
|
/// ::= .ifb string
|
|
bool AsmParser::parseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
|
|
TheCondStack.push_back(TheCondState);
|
|
TheCondState.TheCond = AsmCond::IfCond;
|
|
|
|
if (TheCondState.Ignore) {
|
|
eatToEndOfStatement();
|
|
} else {
|
|
StringRef Str = parseStringToEndOfStatement();
|
|
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.ifb' directive"))
|
|
return true;
|
|
|
|
TheCondState.CondMet = ExpectBlank == Str.empty();
|
|
TheCondState.Ignore = !TheCondState.CondMet;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveIfc
|
|
/// ::= .ifc string1, string2
|
|
/// ::= .ifnc string1, string2
|
|
bool AsmParser::parseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
|
|
TheCondStack.push_back(TheCondState);
|
|
TheCondState.TheCond = AsmCond::IfCond;
|
|
|
|
if (TheCondState.Ignore) {
|
|
eatToEndOfStatement();
|
|
} else {
|
|
StringRef Str1 = parseStringToComma();
|
|
|
|
if (parseToken(AsmToken::Comma, "unexpected token in '.ifc' directive"))
|
|
return true;
|
|
|
|
StringRef Str2 = parseStringToEndOfStatement();
|
|
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.ifc' directive"))
|
|
return true;
|
|
|
|
TheCondState.CondMet = ExpectEqual == (Str1.trim() == Str2.trim());
|
|
TheCondState.Ignore = !TheCondState.CondMet;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveIfeqs
|
|
/// ::= .ifeqs string1, string2
|
|
bool AsmParser::parseDirectiveIfeqs(SMLoc DirectiveLoc, bool ExpectEqual) {
|
|
if (Lexer.isNot(AsmToken::String)) {
|
|
if (ExpectEqual)
|
|
return TokError("expected string parameter for '.ifeqs' directive");
|
|
return TokError("expected string parameter for '.ifnes' directive");
|
|
}
|
|
|
|
StringRef String1 = getTok().getStringContents();
|
|
Lex();
|
|
|
|
if (Lexer.isNot(AsmToken::Comma)) {
|
|
if (ExpectEqual)
|
|
return TokError(
|
|
"expected comma after first string for '.ifeqs' directive");
|
|
return TokError("expected comma after first string for '.ifnes' directive");
|
|
}
|
|
|
|
Lex();
|
|
|
|
if (Lexer.isNot(AsmToken::String)) {
|
|
if (ExpectEqual)
|
|
return TokError("expected string parameter for '.ifeqs' directive");
|
|
return TokError("expected string parameter for '.ifnes' directive");
|
|
}
|
|
|
|
StringRef String2 = getTok().getStringContents();
|
|
Lex();
|
|
|
|
TheCondStack.push_back(TheCondState);
|
|
TheCondState.TheCond = AsmCond::IfCond;
|
|
TheCondState.CondMet = ExpectEqual == (String1 == String2);
|
|
TheCondState.Ignore = !TheCondState.CondMet;
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveIfdef
|
|
/// ::= .ifdef symbol
|
|
bool AsmParser::parseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
|
|
StringRef Name;
|
|
TheCondStack.push_back(TheCondState);
|
|
TheCondState.TheCond = AsmCond::IfCond;
|
|
|
|
if (TheCondState.Ignore) {
|
|
eatToEndOfStatement();
|
|
} else {
|
|
if (check(parseIdentifier(Name), "expected identifier after '.ifdef'") ||
|
|
parseToken(AsmToken::EndOfStatement, "unexpected token in '.ifdef'"))
|
|
return true;
|
|
|
|
MCSymbol *Sym = getContext().lookupSymbol(Name);
|
|
|
|
if (expect_defined)
|
|
TheCondState.CondMet = (Sym && !Sym->isUndefined(false));
|
|
else
|
|
TheCondState.CondMet = (!Sym || Sym->isUndefined(false));
|
|
TheCondState.Ignore = !TheCondState.CondMet;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveElseIf
|
|
/// ::= .elseif expression
|
|
bool AsmParser::parseDirectiveElseIf(SMLoc DirectiveLoc) {
|
|
if (TheCondState.TheCond != AsmCond::IfCond &&
|
|
TheCondState.TheCond != AsmCond::ElseIfCond)
|
|
return Error(DirectiveLoc, "Encountered a .elseif that doesn't follow an"
|
|
" .if or an .elseif");
|
|
TheCondState.TheCond = AsmCond::ElseIfCond;
|
|
|
|
bool LastIgnoreState = false;
|
|
if (!TheCondStack.empty())
|
|
LastIgnoreState = TheCondStack.back().Ignore;
|
|
if (LastIgnoreState || TheCondState.CondMet) {
|
|
TheCondState.Ignore = true;
|
|
eatToEndOfStatement();
|
|
} else {
|
|
int64_t ExprValue;
|
|
if (parseAbsoluteExpression(ExprValue))
|
|
return true;
|
|
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.elseif' directive"))
|
|
return true;
|
|
|
|
TheCondState.CondMet = ExprValue;
|
|
TheCondState.Ignore = !TheCondState.CondMet;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveElse
|
|
/// ::= .else
|
|
bool AsmParser::parseDirectiveElse(SMLoc DirectiveLoc) {
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.else' directive"))
|
|
return true;
|
|
|
|
if (TheCondState.TheCond != AsmCond::IfCond &&
|
|
TheCondState.TheCond != AsmCond::ElseIfCond)
|
|
return Error(DirectiveLoc, "Encountered a .else that doesn't follow "
|
|
" an .if or an .elseif");
|
|
TheCondState.TheCond = AsmCond::ElseCond;
|
|
bool LastIgnoreState = false;
|
|
if (!TheCondStack.empty())
|
|
LastIgnoreState = TheCondStack.back().Ignore;
|
|
if (LastIgnoreState || TheCondState.CondMet)
|
|
TheCondState.Ignore = true;
|
|
else
|
|
TheCondState.Ignore = false;
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveEnd
|
|
/// ::= .end
|
|
bool AsmParser::parseDirectiveEnd(SMLoc DirectiveLoc) {
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.end' directive"))
|
|
return true;
|
|
|
|
while (Lexer.isNot(AsmToken::Eof))
|
|
Lexer.Lex();
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveError
|
|
/// ::= .err
|
|
/// ::= .error [string]
|
|
bool AsmParser::parseDirectiveError(SMLoc L, bool WithMessage) {
|
|
if (!TheCondStack.empty()) {
|
|
if (TheCondStack.back().Ignore) {
|
|
eatToEndOfStatement();
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (!WithMessage)
|
|
return Error(L, ".err encountered");
|
|
|
|
StringRef Message = ".error directive invoked in source file";
|
|
if (Lexer.isNot(AsmToken::EndOfStatement)) {
|
|
if (Lexer.isNot(AsmToken::String))
|
|
return TokError(".error argument must be a string");
|
|
|
|
Message = getTok().getStringContents();
|
|
Lex();
|
|
}
|
|
|
|
return Error(L, Message);
|
|
}
|
|
|
|
/// parseDirectiveWarning
|
|
/// ::= .warning [string]
|
|
bool AsmParser::parseDirectiveWarning(SMLoc L) {
|
|
if (!TheCondStack.empty()) {
|
|
if (TheCondStack.back().Ignore) {
|
|
eatToEndOfStatement();
|
|
return false;
|
|
}
|
|
}
|
|
|
|
StringRef Message = ".warning directive invoked in source file";
|
|
|
|
if (!parseOptionalToken(AsmToken::EndOfStatement)) {
|
|
if (Lexer.isNot(AsmToken::String))
|
|
return TokError(".warning argument must be a string");
|
|
|
|
Message = getTok().getStringContents();
|
|
Lex();
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"expected end of statement in '.warning' directive"))
|
|
return true;
|
|
}
|
|
|
|
return Warning(L, Message);
|
|
}
|
|
|
|
/// parseDirectiveEndIf
|
|
/// ::= .endif
|
|
bool AsmParser::parseDirectiveEndIf(SMLoc DirectiveLoc) {
|
|
if (parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '.endif' directive"))
|
|
return true;
|
|
|
|
if ((TheCondState.TheCond == AsmCond::NoCond) || TheCondStack.empty())
|
|
return Error(DirectiveLoc, "Encountered a .endif that doesn't follow "
|
|
"an .if or .else");
|
|
if (!TheCondStack.empty()) {
|
|
TheCondState = TheCondStack.back();
|
|
TheCondStack.pop_back();
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void AsmParser::initializeDirectiveKindMap() {
|
|
/* Lookup will be done with the directive
|
|
* converted to lower case, so all these
|
|
* keys should be lower case.
|
|
* (target specific directives are handled
|
|
* elsewhere)
|
|
*/
|
|
DirectiveKindMap[".set"] = DK_SET;
|
|
DirectiveKindMap[".equ"] = DK_EQU;
|
|
DirectiveKindMap[".equiv"] = DK_EQUIV;
|
|
DirectiveKindMap[".ascii"] = DK_ASCII;
|
|
DirectiveKindMap[".asciz"] = DK_ASCIZ;
|
|
DirectiveKindMap[".string"] = DK_STRING;
|
|
DirectiveKindMap[".byte"] = DK_BYTE;
|
|
DirectiveKindMap[".short"] = DK_SHORT;
|
|
DirectiveKindMap[".value"] = DK_VALUE;
|
|
DirectiveKindMap[".2byte"] = DK_2BYTE;
|
|
DirectiveKindMap[".long"] = DK_LONG;
|
|
DirectiveKindMap[".int"] = DK_INT;
|
|
DirectiveKindMap[".4byte"] = DK_4BYTE;
|
|
DirectiveKindMap[".quad"] = DK_QUAD;
|
|
DirectiveKindMap[".8byte"] = DK_8BYTE;
|
|
DirectiveKindMap[".octa"] = DK_OCTA;
|
|
DirectiveKindMap[".single"] = DK_SINGLE;
|
|
DirectiveKindMap[".float"] = DK_FLOAT;
|
|
DirectiveKindMap[".double"] = DK_DOUBLE;
|
|
DirectiveKindMap[".align"] = DK_ALIGN;
|
|
DirectiveKindMap[".align32"] = DK_ALIGN32;
|
|
DirectiveKindMap[".balign"] = DK_BALIGN;
|
|
DirectiveKindMap[".balignw"] = DK_BALIGNW;
|
|
DirectiveKindMap[".balignl"] = DK_BALIGNL;
|
|
DirectiveKindMap[".p2align"] = DK_P2ALIGN;
|
|
DirectiveKindMap[".p2alignw"] = DK_P2ALIGNW;
|
|
DirectiveKindMap[".p2alignl"] = DK_P2ALIGNL;
|
|
DirectiveKindMap[".org"] = DK_ORG;
|
|
DirectiveKindMap[".fill"] = DK_FILL;
|
|
DirectiveKindMap[".zero"] = DK_ZERO;
|
|
DirectiveKindMap[".extern"] = DK_EXTERN;
|
|
DirectiveKindMap[".globl"] = DK_GLOBL;
|
|
DirectiveKindMap[".global"] = DK_GLOBAL;
|
|
DirectiveKindMap[".lazy_reference"] = DK_LAZY_REFERENCE;
|
|
DirectiveKindMap[".no_dead_strip"] = DK_NO_DEAD_STRIP;
|
|
DirectiveKindMap[".symbol_resolver"] = DK_SYMBOL_RESOLVER;
|
|
DirectiveKindMap[".private_extern"] = DK_PRIVATE_EXTERN;
|
|
DirectiveKindMap[".reference"] = DK_REFERENCE;
|
|
DirectiveKindMap[".weak_definition"] = DK_WEAK_DEFINITION;
|
|
DirectiveKindMap[".weak_reference"] = DK_WEAK_REFERENCE;
|
|
DirectiveKindMap[".weak_def_can_be_hidden"] = DK_WEAK_DEF_CAN_BE_HIDDEN;
|
|
DirectiveKindMap[".cold"] = DK_COLD;
|
|
DirectiveKindMap[".comm"] = DK_COMM;
|
|
DirectiveKindMap[".common"] = DK_COMMON;
|
|
DirectiveKindMap[".lcomm"] = DK_LCOMM;
|
|
DirectiveKindMap[".abort"] = DK_ABORT;
|
|
DirectiveKindMap[".include"] = DK_INCLUDE;
|
|
DirectiveKindMap[".incbin"] = DK_INCBIN;
|
|
DirectiveKindMap[".code16"] = DK_CODE16;
|
|
DirectiveKindMap[".code16gcc"] = DK_CODE16GCC;
|
|
DirectiveKindMap[".rept"] = DK_REPT;
|
|
DirectiveKindMap[".rep"] = DK_REPT;
|
|
DirectiveKindMap[".irp"] = DK_IRP;
|
|
DirectiveKindMap[".irpc"] = DK_IRPC;
|
|
DirectiveKindMap[".endr"] = DK_ENDR;
|
|
DirectiveKindMap[".bundle_align_mode"] = DK_BUNDLE_ALIGN_MODE;
|
|
DirectiveKindMap[".bundle_lock"] = DK_BUNDLE_LOCK;
|
|
DirectiveKindMap[".bundle_unlock"] = DK_BUNDLE_UNLOCK;
|
|
DirectiveKindMap[".if"] = DK_IF;
|
|
DirectiveKindMap[".ifeq"] = DK_IFEQ;
|
|
DirectiveKindMap[".ifge"] = DK_IFGE;
|
|
DirectiveKindMap[".ifgt"] = DK_IFGT;
|
|
DirectiveKindMap[".ifle"] = DK_IFLE;
|
|
DirectiveKindMap[".iflt"] = DK_IFLT;
|
|
DirectiveKindMap[".ifne"] = DK_IFNE;
|
|
DirectiveKindMap[".ifb"] = DK_IFB;
|
|
DirectiveKindMap[".ifnb"] = DK_IFNB;
|
|
DirectiveKindMap[".ifc"] = DK_IFC;
|
|
DirectiveKindMap[".ifeqs"] = DK_IFEQS;
|
|
DirectiveKindMap[".ifnc"] = DK_IFNC;
|
|
DirectiveKindMap[".ifnes"] = DK_IFNES;
|
|
DirectiveKindMap[".ifdef"] = DK_IFDEF;
|
|
DirectiveKindMap[".ifndef"] = DK_IFNDEF;
|
|
DirectiveKindMap[".ifnotdef"] = DK_IFNOTDEF;
|
|
DirectiveKindMap[".elseif"] = DK_ELSEIF;
|
|
DirectiveKindMap[".else"] = DK_ELSE;
|
|
DirectiveKindMap[".end"] = DK_END;
|
|
DirectiveKindMap[".endif"] = DK_ENDIF;
|
|
DirectiveKindMap[".skip"] = DK_SKIP;
|
|
DirectiveKindMap[".space"] = DK_SPACE;
|
|
DirectiveKindMap[".file"] = DK_FILE;
|
|
DirectiveKindMap[".line"] = DK_LINE;
|
|
DirectiveKindMap[".loc"] = DK_LOC;
|
|
DirectiveKindMap[".stabs"] = DK_STABS;
|
|
DirectiveKindMap[".cv_file"] = DK_CV_FILE;
|
|
DirectiveKindMap[".cv_func_id"] = DK_CV_FUNC_ID;
|
|
DirectiveKindMap[".cv_loc"] = DK_CV_LOC;
|
|
DirectiveKindMap[".cv_linetable"] = DK_CV_LINETABLE;
|
|
DirectiveKindMap[".cv_inline_linetable"] = DK_CV_INLINE_LINETABLE;
|
|
DirectiveKindMap[".cv_inline_site_id"] = DK_CV_INLINE_SITE_ID;
|
|
DirectiveKindMap[".cv_def_range"] = DK_CV_DEF_RANGE;
|
|
DirectiveKindMap[".cv_string"] = DK_CV_STRING;
|
|
DirectiveKindMap[".cv_stringtable"] = DK_CV_STRINGTABLE;
|
|
DirectiveKindMap[".cv_filechecksums"] = DK_CV_FILECHECKSUMS;
|
|
DirectiveKindMap[".cv_filechecksumoffset"] = DK_CV_FILECHECKSUM_OFFSET;
|
|
DirectiveKindMap[".cv_fpo_data"] = DK_CV_FPO_DATA;
|
|
DirectiveKindMap[".sleb128"] = DK_SLEB128;
|
|
DirectiveKindMap[".uleb128"] = DK_ULEB128;
|
|
DirectiveKindMap[".cfi_sections"] = DK_CFI_SECTIONS;
|
|
DirectiveKindMap[".cfi_startproc"] = DK_CFI_STARTPROC;
|
|
DirectiveKindMap[".cfi_endproc"] = DK_CFI_ENDPROC;
|
|
DirectiveKindMap[".cfi_def_cfa"] = DK_CFI_DEF_CFA;
|
|
DirectiveKindMap[".cfi_def_cfa_offset"] = DK_CFI_DEF_CFA_OFFSET;
|
|
DirectiveKindMap[".cfi_adjust_cfa_offset"] = DK_CFI_ADJUST_CFA_OFFSET;
|
|
DirectiveKindMap[".cfi_def_cfa_register"] = DK_CFI_DEF_CFA_REGISTER;
|
|
DirectiveKindMap[".cfi_offset"] = DK_CFI_OFFSET;
|
|
DirectiveKindMap[".cfi_rel_offset"] = DK_CFI_REL_OFFSET;
|
|
DirectiveKindMap[".cfi_personality"] = DK_CFI_PERSONALITY;
|
|
DirectiveKindMap[".cfi_lsda"] = DK_CFI_LSDA;
|
|
DirectiveKindMap[".cfi_remember_state"] = DK_CFI_REMEMBER_STATE;
|
|
DirectiveKindMap[".cfi_restore_state"] = DK_CFI_RESTORE_STATE;
|
|
DirectiveKindMap[".cfi_same_value"] = DK_CFI_SAME_VALUE;
|
|
DirectiveKindMap[".cfi_restore"] = DK_CFI_RESTORE;
|
|
DirectiveKindMap[".cfi_escape"] = DK_CFI_ESCAPE;
|
|
DirectiveKindMap[".cfi_return_column"] = DK_CFI_RETURN_COLUMN;
|
|
DirectiveKindMap[".cfi_signal_frame"] = DK_CFI_SIGNAL_FRAME;
|
|
DirectiveKindMap[".cfi_undefined"] = DK_CFI_UNDEFINED;
|
|
DirectiveKindMap[".cfi_register"] = DK_CFI_REGISTER;
|
|
DirectiveKindMap[".cfi_window_save"] = DK_CFI_WINDOW_SAVE;
|
|
DirectiveKindMap[".cfi_b_key_frame"] = DK_CFI_B_KEY_FRAME;
|
|
DirectiveKindMap[".macros_on"] = DK_MACROS_ON;
|
|
DirectiveKindMap[".macros_off"] = DK_MACROS_OFF;
|
|
DirectiveKindMap[".macro"] = DK_MACRO;
|
|
DirectiveKindMap[".exitm"] = DK_EXITM;
|
|
DirectiveKindMap[".endm"] = DK_ENDM;
|
|
DirectiveKindMap[".endmacro"] = DK_ENDMACRO;
|
|
DirectiveKindMap[".purgem"] = DK_PURGEM;
|
|
DirectiveKindMap[".err"] = DK_ERR;
|
|
DirectiveKindMap[".error"] = DK_ERROR;
|
|
DirectiveKindMap[".warning"] = DK_WARNING;
|
|
DirectiveKindMap[".altmacro"] = DK_ALTMACRO;
|
|
DirectiveKindMap[".noaltmacro"] = DK_NOALTMACRO;
|
|
DirectiveKindMap[".reloc"] = DK_RELOC;
|
|
DirectiveKindMap[".dc"] = DK_DC;
|
|
DirectiveKindMap[".dc.a"] = DK_DC_A;
|
|
DirectiveKindMap[".dc.b"] = DK_DC_B;
|
|
DirectiveKindMap[".dc.d"] = DK_DC_D;
|
|
DirectiveKindMap[".dc.l"] = DK_DC_L;
|
|
DirectiveKindMap[".dc.s"] = DK_DC_S;
|
|
DirectiveKindMap[".dc.w"] = DK_DC_W;
|
|
DirectiveKindMap[".dc.x"] = DK_DC_X;
|
|
DirectiveKindMap[".dcb"] = DK_DCB;
|
|
DirectiveKindMap[".dcb.b"] = DK_DCB_B;
|
|
DirectiveKindMap[".dcb.d"] = DK_DCB_D;
|
|
DirectiveKindMap[".dcb.l"] = DK_DCB_L;
|
|
DirectiveKindMap[".dcb.s"] = DK_DCB_S;
|
|
DirectiveKindMap[".dcb.w"] = DK_DCB_W;
|
|
DirectiveKindMap[".dcb.x"] = DK_DCB_X;
|
|
DirectiveKindMap[".ds"] = DK_DS;
|
|
DirectiveKindMap[".ds.b"] = DK_DS_B;
|
|
DirectiveKindMap[".ds.d"] = DK_DS_D;
|
|
DirectiveKindMap[".ds.l"] = DK_DS_L;
|
|
DirectiveKindMap[".ds.p"] = DK_DS_P;
|
|
DirectiveKindMap[".ds.s"] = DK_DS_S;
|
|
DirectiveKindMap[".ds.w"] = DK_DS_W;
|
|
DirectiveKindMap[".ds.x"] = DK_DS_X;
|
|
DirectiveKindMap[".print"] = DK_PRINT;
|
|
DirectiveKindMap[".addrsig"] = DK_ADDRSIG;
|
|
DirectiveKindMap[".addrsig_sym"] = DK_ADDRSIG_SYM;
|
|
}
|
|
|
|
MCAsmMacro *AsmParser::parseMacroLikeBody(SMLoc DirectiveLoc) {
|
|
AsmToken EndToken, StartToken = getTok();
|
|
|
|
unsigned NestLevel = 0;
|
|
while (true) {
|
|
// Check whether we have reached the end of the file.
|
|
if (getLexer().is(AsmToken::Eof)) {
|
|
printError(DirectiveLoc, "no matching '.endr' in definition");
|
|
return nullptr;
|
|
}
|
|
|
|
if (Lexer.is(AsmToken::Identifier) &&
|
|
(getTok().getIdentifier() == ".rep" ||
|
|
getTok().getIdentifier() == ".rept" ||
|
|
getTok().getIdentifier() == ".irp" ||
|
|
getTok().getIdentifier() == ".irpc")) {
|
|
++NestLevel;
|
|
}
|
|
|
|
// Otherwise, check whether we have reached the .endr.
|
|
if (Lexer.is(AsmToken::Identifier) && getTok().getIdentifier() == ".endr") {
|
|
if (NestLevel == 0) {
|
|
EndToken = getTok();
|
|
Lex();
|
|
if (Lexer.isNot(AsmToken::EndOfStatement)) {
|
|
printError(getTok().getLoc(),
|
|
"unexpected token in '.endr' directive");
|
|
return nullptr;
|
|
}
|
|
break;
|
|
}
|
|
--NestLevel;
|
|
}
|
|
|
|
// Otherwise, scan till the end of the statement.
|
|
eatToEndOfStatement();
|
|
}
|
|
|
|
const char *BodyStart = StartToken.getLoc().getPointer();
|
|
const char *BodyEnd = EndToken.getLoc().getPointer();
|
|
StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
|
|
|
|
// We Are Anonymous.
|
|
MacroLikeBodies.emplace_back(StringRef(), Body, MCAsmMacroParameters());
|
|
return &MacroLikeBodies.back();
|
|
}
|
|
|
|
void AsmParser::instantiateMacroLikeBody(MCAsmMacro *M, SMLoc DirectiveLoc,
|
|
raw_svector_ostream &OS) {
|
|
OS << ".endr\n";
|
|
|
|
std::unique_ptr<MemoryBuffer> Instantiation =
|
|
MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
|
|
|
|
// Create the macro instantiation object and add to the current macro
|
|
// instantiation stack.
|
|
MacroInstantiation *MI = new MacroInstantiation{
|
|
DirectiveLoc, CurBuffer, getTok().getLoc(), TheCondStack.size()};
|
|
ActiveMacros.push_back(MI);
|
|
|
|
// Jump to the macro instantiation and prime the lexer.
|
|
CurBuffer = SrcMgr.AddNewSourceBuffer(std::move(Instantiation), SMLoc());
|
|
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer)->getBuffer());
|
|
Lex();
|
|
}
|
|
|
|
/// parseDirectiveRept
|
|
/// ::= .rep | .rept count
|
|
bool AsmParser::parseDirectiveRept(SMLoc DirectiveLoc, StringRef Dir) {
|
|
const MCExpr *CountExpr;
|
|
SMLoc CountLoc = getTok().getLoc();
|
|
if (parseExpression(CountExpr))
|
|
return true;
|
|
|
|
int64_t Count;
|
|
if (!CountExpr->evaluateAsAbsolute(Count, getStreamer().getAssemblerPtr())) {
|
|
return Error(CountLoc, "unexpected token in '" + Dir + "' directive");
|
|
}
|
|
|
|
if (check(Count < 0, CountLoc, "Count is negative") ||
|
|
parseToken(AsmToken::EndOfStatement,
|
|
"unexpected token in '" + Dir + "' directive"))
|
|
return true;
|
|
|
|
// Lex the rept definition.
|
|
MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
|
|
if (!M)
|
|
return true;
|
|
|
|
// Macro instantiation is lexical, unfortunately. We construct a new buffer
|
|
// to hold the macro body with substitutions.
|
|
SmallString<256> Buf;
|
|
raw_svector_ostream OS(Buf);
|
|
while (Count--) {
|
|
// Note that the AtPseudoVariable is disabled for instantiations of .rep(t).
|
|
if (expandMacro(OS, M->Body, None, None, false, getTok().getLoc()))
|
|
return true;
|
|
}
|
|
instantiateMacroLikeBody(M, DirectiveLoc, OS);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveIrp
|
|
/// ::= .irp symbol,values
|
|
bool AsmParser::parseDirectiveIrp(SMLoc DirectiveLoc) {
|
|
MCAsmMacroParameter Parameter;
|
|
MCAsmMacroArguments A;
|
|
if (check(parseIdentifier(Parameter.Name),
|
|
"expected identifier in '.irp' directive") ||
|
|
parseToken(AsmToken::Comma, "expected comma in '.irp' directive") ||
|
|
parseMacroArguments(nullptr, A) ||
|
|
parseToken(AsmToken::EndOfStatement, "expected End of Statement"))
|
|
return true;
|
|
|
|
// Lex the irp definition.
|
|
MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
|
|
if (!M)
|
|
return true;
|
|
|
|
// Macro instantiation is lexical, unfortunately. We construct a new buffer
|
|
// to hold the macro body with substitutions.
|
|
SmallString<256> Buf;
|
|
raw_svector_ostream OS(Buf);
|
|
|
|
for (const MCAsmMacroArgument &Arg : A) {
|
|
// Note that the AtPseudoVariable is enabled for instantiations of .irp.
|
|
// This is undocumented, but GAS seems to support it.
|
|
if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
|
|
return true;
|
|
}
|
|
|
|
instantiateMacroLikeBody(M, DirectiveLoc, OS);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// parseDirectiveIrpc
|
|
/// ::= .irpc symbol,values
|
|
bool AsmParser::parseDirectiveIrpc(SMLoc DirectiveLoc) {
|
|
MCAsmMacroParameter Parameter;
|
|
MCAsmMacroArguments A;
|
|
|
|
if (check(parseIdentifier(Parameter.Name),
|
|
"expected identifier in '.irpc' directive") ||
|
|
parseToken(AsmToken::Comma, "expected comma in '.irpc' directive") ||
|
|
parseMacroArguments(nullptr, A))
|
|
return true;
|
|
|
|
if (A.size() != 1 || A.front().size() != 1)
|
|
return TokError("unexpected token in '.irpc' directive");
|
|
|
|
// Eat the end of statement.
|
|
if (parseToken(AsmToken::EndOfStatement, "expected end of statement"))
|
|
return true;
|
|
|
|
// Lex the irpc definition.
|
|
MCAsmMacro *M = parseMacroLikeBody(DirectiveLoc);
|
|
if (!M)
|
|
return true;
|
|
|
|
// Macro instantiation is lexical, unfortunately. We construct a new buffer
|
|
// to hold the macro body with substitutions.
|
|
SmallString<256> Buf;
|
|
raw_svector_ostream OS(Buf);
|
|
|
|
StringRef Values = A.front().front().getString();
|
|
for (std::size_t I = 0, End = Values.size(); I != End; ++I) {
|
|
MCAsmMacroArgument Arg;
|
|
Arg.emplace_back(AsmToken::Identifier, Values.slice(I, I + 1));
|
|
|
|
// Note that the AtPseudoVariable is enabled for instantiations of .irpc.
|
|
// This is undocumented, but GAS seems to support it.
|
|
if (expandMacro(OS, M->Body, Parameter, Arg, true, getTok().getLoc()))
|
|
return true;
|
|
}
|
|
|
|
instantiateMacroLikeBody(M, DirectiveLoc, OS);
|
|
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::parseDirectiveEndr(SMLoc DirectiveLoc) {
|
|
if (ActiveMacros.empty())
|
|
return TokError("unmatched '.endr' directive");
|
|
|
|
// The only .repl that should get here are the ones created by
|
|
// instantiateMacroLikeBody.
|
|
assert(getLexer().is(AsmToken::EndOfStatement));
|
|
|
|
handleMacroExit();
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::parseDirectiveMSEmit(SMLoc IDLoc, ParseStatementInfo &Info,
|
|
size_t Len) {
|
|
const MCExpr *Value;
|
|
SMLoc ExprLoc = getLexer().getLoc();
|
|
if (parseExpression(Value))
|
|
return true;
|
|
const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
|
|
if (!MCE)
|
|
return Error(ExprLoc, "unexpected expression in _emit");
|
|
uint64_t IntValue = MCE->getValue();
|
|
if (!isUInt<8>(IntValue) && !isInt<8>(IntValue))
|
|
return Error(ExprLoc, "literal value out of range for directive");
|
|
|
|
Info.AsmRewrites->emplace_back(AOK_Emit, IDLoc, Len);
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::parseDirectiveMSAlign(SMLoc IDLoc, ParseStatementInfo &Info) {
|
|
const MCExpr *Value;
|
|
SMLoc ExprLoc = getLexer().getLoc();
|
|
if (parseExpression(Value))
|
|
return true;
|
|
const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Value);
|
|
if (!MCE)
|
|
return Error(ExprLoc, "unexpected expression in align");
|
|
uint64_t IntValue = MCE->getValue();
|
|
if (!isPowerOf2_64(IntValue))
|
|
return Error(ExprLoc, "literal value not a power of two greater then zero");
|
|
|
|
Info.AsmRewrites->emplace_back(AOK_Align, IDLoc, 5, Log2_64(IntValue));
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::parseDirectivePrint(SMLoc DirectiveLoc) {
|
|
const AsmToken StrTok = getTok();
|
|
Lex();
|
|
if (StrTok.isNot(AsmToken::String) || StrTok.getString().front() != '"')
|
|
return Error(DirectiveLoc, "expected double quoted string after .print");
|
|
if (parseToken(AsmToken::EndOfStatement, "expected end of statement"))
|
|
return true;
|
|
llvm::outs() << StrTok.getStringContents() << '\n';
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::parseDirectiveAddrsig() {
|
|
getStreamer().emitAddrsig();
|
|
return false;
|
|
}
|
|
|
|
bool AsmParser::parseDirectiveAddrsigSym() {
|
|
StringRef Name;
|
|
if (check(parseIdentifier(Name),
|
|
"expected identifier in '.addrsig_sym' directive"))
|
|
return true;
|
|
MCSymbol *Sym = getContext().getOrCreateSymbol(Name);
|
|
getStreamer().emitAddrsigSym(Sym);
|
|
return false;
|
|
}
|
|
|
|
// We are comparing pointers, but the pointers are relative to a single string.
|
|
// Thus, this should always be deterministic.
|
|
static int rewritesSort(const AsmRewrite *AsmRewriteA,
|
|
const AsmRewrite *AsmRewriteB) {
|
|
if (AsmRewriteA->Loc.getPointer() < AsmRewriteB->Loc.getPointer())
|
|
return -1;
|
|
if (AsmRewriteB->Loc.getPointer() < AsmRewriteA->Loc.getPointer())
|
|
return 1;
|
|
|
|
// It's possible to have a SizeDirective, Imm/ImmPrefix and an Input/Output
|
|
// rewrite to the same location. Make sure the SizeDirective rewrite is
|
|
// performed first, then the Imm/ImmPrefix and finally the Input/Output. This
|
|
// ensures the sort algorithm is stable.
|
|
if (AsmRewritePrecedence[AsmRewriteA->Kind] >
|
|
AsmRewritePrecedence[AsmRewriteB->Kind])
|
|
return -1;
|
|
|
|
if (AsmRewritePrecedence[AsmRewriteA->Kind] <
|
|
AsmRewritePrecedence[AsmRewriteB->Kind])
|
|
return 1;
|
|
llvm_unreachable("Unstable rewrite sort.");
|
|
}
|
|
|
|
bool AsmParser::parseMSInlineAsm(
|
|
void *AsmLoc, std::string &AsmString, unsigned &NumOutputs,
|
|
unsigned &NumInputs, SmallVectorImpl<std::pair<void *, bool>> &OpDecls,
|
|
SmallVectorImpl<std::string> &Constraints,
|
|
SmallVectorImpl<std::string> &Clobbers, const MCInstrInfo *MII,
|
|
const MCInstPrinter *IP, MCAsmParserSemaCallback &SI) {
|
|
SmallVector<void *, 4> InputDecls;
|
|
SmallVector<void *, 4> OutputDecls;
|
|
SmallVector<bool, 4> InputDeclsAddressOf;
|
|
SmallVector<bool, 4> OutputDeclsAddressOf;
|
|
SmallVector<std::string, 4> InputConstraints;
|
|
SmallVector<std::string, 4> OutputConstraints;
|
|
SmallVector<unsigned, 4> ClobberRegs;
|
|
|
|
SmallVector<AsmRewrite, 4> AsmStrRewrites;
|
|
|
|
// Prime the lexer.
|
|
Lex();
|
|
|
|
// While we have input, parse each statement.
|
|
unsigned InputIdx = 0;
|
|
unsigned OutputIdx = 0;
|
|
while (getLexer().isNot(AsmToken::Eof)) {
|
|
// Parse curly braces marking block start/end
|
|
if (parseCurlyBlockScope(AsmStrRewrites))
|
|
continue;
|
|
|
|
ParseStatementInfo Info(&AsmStrRewrites);
|
|
bool StatementErr = parseStatement(Info, &SI);
|
|
|
|
if (StatementErr || Info.ParseError) {
|
|
// Emit pending errors if any exist.
|
|
printPendingErrors();
|
|
return true;
|
|
}
|
|
|
|
// No pending error should exist here.
|
|
assert(!hasPendingError() && "unexpected error from parseStatement");
|
|
|
|
if (Info.Opcode == ~0U)
|
|
continue;
|
|
|
|
const MCInstrDesc &Desc = MII->get(Info.Opcode);
|
|
|
|
// Build the list of clobbers, outputs and inputs.
|
|
for (unsigned i = 1, e = Info.ParsedOperands.size(); i != e; ++i) {
|
|
MCParsedAsmOperand &Operand = *Info.ParsedOperands[i];
|
|
|
|
// Register operand.
|
|
if (Operand.isReg() && !Operand.needAddressOf() &&
|
|
!getTargetParser().OmitRegisterFromClobberLists(Operand.getReg())) {
|
|
unsigned NumDefs = Desc.getNumDefs();
|
|
// Clobber.
|
|
if (NumDefs && Operand.getMCOperandNum() < NumDefs)
|
|
ClobberRegs.push_back(Operand.getReg());
|
|
continue;
|
|
}
|
|
|
|
// Expr/Input or Output.
|
|
StringRef SymName = Operand.getSymName();
|
|
if (SymName.empty())
|
|
continue;
|
|
|
|
void *OpDecl = Operand.getOpDecl();
|
|
if (!OpDecl)
|
|
continue;
|
|
|
|
StringRef Constraint = Operand.getConstraint();
|
|
if (Operand.isImm()) {
|
|
// Offset as immediate
|
|
if (Operand.isOffsetOfLocal())
|
|
Constraint = "r";
|
|
else
|
|
Constraint = "i";
|
|
}
|
|
|
|
bool isOutput = (i == 1) && Desc.mayStore();
|
|
SMLoc Start = SMLoc::getFromPointer(SymName.data());
|
|
if (isOutput) {
|
|
++InputIdx;
|
|
OutputDecls.push_back(OpDecl);
|
|
OutputDeclsAddressOf.push_back(Operand.needAddressOf());
|
|
OutputConstraints.push_back(("=" + Constraint).str());
|
|
AsmStrRewrites.emplace_back(AOK_Output, Start, SymName.size());
|
|
} else {
|
|
InputDecls.push_back(OpDecl);
|
|
InputDeclsAddressOf.push_back(Operand.needAddressOf());
|
|
InputConstraints.push_back(Constraint.str());
|
|
if (Desc.OpInfo[i - 1].isBranchTarget())
|
|
AsmStrRewrites.emplace_back(AOK_CallInput, Start, SymName.size());
|
|
else
|
|
AsmStrRewrites.emplace_back(AOK_Input, Start, SymName.size());
|
|
}
|
|
}
|
|
|
|
// Consider implicit defs to be clobbers. Think of cpuid and push.
|
|
ArrayRef<MCPhysReg> ImpDefs(Desc.getImplicitDefs(),
|
|
Desc.getNumImplicitDefs());
|
|
ClobberRegs.insert(ClobberRegs.end(), ImpDefs.begin(), ImpDefs.end());
|
|
}
|
|
|
|
// Set the number of Outputs and Inputs.
|
|
NumOutputs = OutputDecls.size();
|
|
NumInputs = InputDecls.size();
|
|
|
|
// Set the unique clobbers.
|
|
array_pod_sort(ClobberRegs.begin(), ClobberRegs.end());
|
|
ClobberRegs.erase(std::unique(ClobberRegs.begin(), ClobberRegs.end()),
|
|
ClobberRegs.end());
|
|
Clobbers.assign(ClobberRegs.size(), std::string());
|
|
for (unsigned I = 0, E = ClobberRegs.size(); I != E; ++I) {
|
|
raw_string_ostream OS(Clobbers[I]);
|
|
IP->printRegName(OS, ClobberRegs[I]);
|
|
}
|
|
|
|
// Merge the various outputs and inputs. Output are expected first.
|
|
if (NumOutputs || NumInputs) {
|
|
unsigned NumExprs = NumOutputs + NumInputs;
|
|
OpDecls.resize(NumExprs);
|
|
Constraints.resize(NumExprs);
|
|
for (unsigned i = 0; i < NumOutputs; ++i) {
|
|
OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]);
|
|
Constraints[i] = OutputConstraints[i];
|
|
}
|
|
for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) {
|
|
OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]);
|
|
Constraints[j] = InputConstraints[i];
|
|
}
|
|
}
|
|
|
|
// Build the IR assembly string.
|
|
std::string AsmStringIR;
|
|
raw_string_ostream OS(AsmStringIR);
|
|
StringRef ASMString =
|
|
SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID())->getBuffer();
|
|
const char *AsmStart = ASMString.begin();
|
|
const char *AsmEnd = ASMString.end();
|
|
array_pod_sort(AsmStrRewrites.begin(), AsmStrRewrites.end(), rewritesSort);
|
|
for (auto it = AsmStrRewrites.begin(); it != AsmStrRewrites.end(); ++it) {
|
|
const AsmRewrite &AR = *it;
|
|
// Check if this has already been covered by another rewrite...
|
|
if (AR.Done)
|
|
continue;
|
|
AsmRewriteKind Kind = AR.Kind;
|
|
|
|
const char *Loc = AR.Loc.getPointer();
|
|
assert(Loc >= AsmStart && "Expected Loc to be at or after Start!");
|
|
|
|
// Emit everything up to the immediate/expression.
|
|
if (unsigned Len = Loc - AsmStart)
|
|
OS << StringRef(AsmStart, Len);
|
|
|
|
// Skip the original expression.
|
|
if (Kind == AOK_Skip) {
|
|
AsmStart = Loc + AR.Len;
|
|
continue;
|
|
}
|
|
|
|
unsigned AdditionalSkip = 0;
|
|
// Rewrite expressions in $N notation.
|
|
switch (Kind) {
|
|
default:
|
|
break;
|
|
case AOK_IntelExpr:
|
|
assert(AR.IntelExp.isValid() && "cannot write invalid intel expression");
|
|
if (AR.IntelExp.NeedBracs)
|
|
OS << "[";
|
|
if (AR.IntelExp.hasBaseReg())
|
|
OS << AR.IntelExp.BaseReg;
|
|
if (AR.IntelExp.hasIndexReg())
|
|
OS << (AR.IntelExp.hasBaseReg() ? " + " : "")
|
|
<< AR.IntelExp.IndexReg;
|
|
if (AR.IntelExp.Scale > 1)
|
|
OS << " * $$" << AR.IntelExp.Scale;
|
|
if (AR.IntelExp.hasOffset()) {
|
|
if (AR.IntelExp.hasRegs())
|
|
OS << " + ";
|
|
// Fuse this rewrite with a rewrite of the offset name, if present.
|
|
StringRef OffsetName = AR.IntelExp.OffsetName;
|
|
SMLoc OffsetLoc = SMLoc::getFromPointer(AR.IntelExp.OffsetName.data());
|
|
size_t OffsetLen = OffsetName.size();
|
|
auto rewrite_it = std::find_if(
|
|
it, AsmStrRewrites.end(), [&](const AsmRewrite &FusingAR) {
|
|
return FusingAR.Loc == OffsetLoc && FusingAR.Len == OffsetLen &&
|
|
(FusingAR.Kind == AOK_Input ||
|
|
FusingAR.Kind == AOK_CallInput);
|
|
});
|
|
if (rewrite_it == AsmStrRewrites.end()) {
|
|
OS << "offset " << OffsetName;
|
|
} else if (rewrite_it->Kind == AOK_CallInput) {
|
|
OS << "${" << InputIdx++ << ":P}";
|
|
rewrite_it->Done = true;
|
|
} else {
|
|
OS << '$' << InputIdx++;
|
|
rewrite_it->Done = true;
|
|
}
|
|
}
|
|
if (AR.IntelExp.Imm || AR.IntelExp.emitImm())
|
|
OS << (AR.IntelExp.emitImm() ? "$$" : " + $$") << AR.IntelExp.Imm;
|
|
if (AR.IntelExp.NeedBracs)
|
|
OS << "]";
|
|
break;
|
|
case AOK_Label:
|
|
OS << Ctx.getAsmInfo()->getPrivateLabelPrefix() << AR.Label;
|
|
break;
|
|
case AOK_Input:
|
|
OS << '$' << InputIdx++;
|
|
break;
|
|
case AOK_CallInput:
|
|
OS << "${" << InputIdx++ << ":P}";
|
|
break;
|
|
case AOK_Output:
|
|
OS << '$' << OutputIdx++;
|
|
break;
|
|
case AOK_SizeDirective:
|
|
switch (AR.Val) {
|
|
default: break;
|
|
case 8: OS << "byte ptr "; break;
|
|
case 16: OS << "word ptr "; break;
|
|
case 32: OS << "dword ptr "; break;
|
|
case 64: OS << "qword ptr "; break;
|
|
case 80: OS << "xword ptr "; break;
|
|
case 128: OS << "xmmword ptr "; break;
|
|
case 256: OS << "ymmword ptr "; break;
|
|
}
|
|
break;
|
|
case AOK_Emit:
|
|
OS << ".byte";
|
|
break;
|
|
case AOK_Align: {
|
|
// MS alignment directives are measured in bytes. If the native assembler
|
|
// measures alignment in bytes, we can pass it straight through.
|
|
OS << ".align";
|
|
if (getContext().getAsmInfo()->getAlignmentIsInBytes())
|
|
break;
|
|
|
|
// Alignment is in log2 form, so print that instead and skip the original
|
|
// immediate.
|
|
unsigned Val = AR.Val;
|
|
OS << ' ' << Val;
|
|
assert(Val < 10 && "Expected alignment less then 2^10.");
|
|
AdditionalSkip = (Val < 4) ? 2 : Val < 7 ? 3 : 4;
|
|
break;
|
|
}
|
|
case AOK_EVEN:
|
|
OS << ".even";
|
|
break;
|
|
case AOK_EndOfStatement:
|
|
OS << "\n\t";
|
|
break;
|
|
}
|
|
|
|
// Skip the original expression.
|
|
AsmStart = Loc + AR.Len + AdditionalSkip;
|
|
}
|
|
|
|
// Emit the remainder of the asm string.
|
|
if (AsmStart != AsmEnd)
|
|
OS << StringRef(AsmStart, AsmEnd - AsmStart);
|
|
|
|
AsmString = OS.str();
|
|
return false;
|
|
}
|
|
|
|
namespace llvm {
|
|
namespace MCParserUtils {
|
|
|
|
/// Returns whether the given symbol is used anywhere in the given expression,
|
|
/// or subexpressions.
|
|
static bool isSymbolUsedInExpression(const MCSymbol *Sym, const MCExpr *Value) {
|
|
switch (Value->getKind()) {
|
|
case MCExpr::Binary: {
|
|
const MCBinaryExpr *BE = static_cast<const MCBinaryExpr *>(Value);
|
|
return isSymbolUsedInExpression(Sym, BE->getLHS()) ||
|
|
isSymbolUsedInExpression(Sym, BE->getRHS());
|
|
}
|
|
case MCExpr::Target:
|
|
case MCExpr::Constant:
|
|
return false;
|
|
case MCExpr::SymbolRef: {
|
|
const MCSymbol &S =
|
|
static_cast<const MCSymbolRefExpr *>(Value)->getSymbol();
|
|
if (S.isVariable())
|
|
return isSymbolUsedInExpression(Sym, S.getVariableValue());
|
|
return &S == Sym;
|
|
}
|
|
case MCExpr::Unary:
|
|
return isSymbolUsedInExpression(
|
|
Sym, static_cast<const MCUnaryExpr *>(Value)->getSubExpr());
|
|
}
|
|
|
|
llvm_unreachable("Unknown expr kind!");
|
|
}
|
|
|
|
bool parseAssignmentExpression(StringRef Name, bool allow_redef,
|
|
MCAsmParser &Parser, MCSymbol *&Sym,
|
|
const MCExpr *&Value) {
|
|
|
|
// FIXME: Use better location, we should use proper tokens.
|
|
SMLoc EqualLoc = Parser.getTok().getLoc();
|
|
if (Parser.parseExpression(Value))
|
|
return Parser.TokError("missing expression");
|
|
|
|
// Note: we don't count b as used in "a = b". This is to allow
|
|
// a = b
|
|
// b = c
|
|
|
|
if (Parser.parseToken(AsmToken::EndOfStatement))
|
|
return true;
|
|
|
|
// Validate that the LHS is allowed to be a variable (either it has not been
|
|
// used as a symbol, or it is an absolute symbol).
|
|
Sym = Parser.getContext().lookupSymbol(Name);
|
|
if (Sym) {
|
|
// Diagnose assignment to a label.
|
|
//
|
|
// FIXME: Diagnostics. Note the location of the definition as a label.
|
|
// FIXME: Diagnose assignment to protected identifier (e.g., register name).
|
|
if (isSymbolUsedInExpression(Sym, Value))
|
|
return Parser.Error(EqualLoc, "Recursive use of '" + Name + "'");
|
|
else if (Sym->isUndefined(/*SetUsed*/ false) && !Sym->isUsed() &&
|
|
!Sym->isVariable())
|
|
; // Allow redefinitions of undefined symbols only used in directives.
|
|
else if (Sym->isVariable() && !Sym->isUsed() && allow_redef)
|
|
; // Allow redefinitions of variables that haven't yet been used.
|
|
else if (!Sym->isUndefined() && (!Sym->isVariable() || !allow_redef))
|
|
return Parser.Error(EqualLoc, "redefinition of '" + Name + "'");
|
|
else if (!Sym->isVariable())
|
|
return Parser.Error(EqualLoc, "invalid assignment to '" + Name + "'");
|
|
else if (!isa<MCConstantExpr>(Sym->getVariableValue()))
|
|
return Parser.Error(EqualLoc,
|
|
"invalid reassignment of non-absolute variable '" +
|
|
Name + "'");
|
|
} else if (Name == ".") {
|
|
Parser.getStreamer().emitValueToOffset(Value, 0, EqualLoc);
|
|
return false;
|
|
} else
|
|
Sym = Parser.getContext().getOrCreateSymbol(Name);
|
|
|
|
Sym->setRedefinable(allow_redef);
|
|
|
|
return false;
|
|
}
|
|
|
|
} // end namespace MCParserUtils
|
|
} // end namespace llvm
|
|
|
|
/// Create an MCAsmParser instance.
|
|
MCAsmParser *llvm::createMCAsmParser(SourceMgr &SM, MCContext &C,
|
|
MCStreamer &Out, const MCAsmInfo &MAI,
|
|
unsigned CB) {
|
|
return new AsmParser(SM, C, Out, MAI, CB);
|
|
}
|