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c8a1169c93
This new IR facility allows us to represent the object-file semantic of a COMDAT group. COMDATs allow us to tie together sections and make the inclusion of one dependent on another. This is required to implement features like MS ABI VFTables and optimizing away certain kinds of initialization in C++. This functionality is only representable in COFF and ELF, Mach-O has no similar mechanism. Differential Revision: http://reviews.llvm.org/D4178 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211920 91177308-0d34-0410-b5e6-96231b3b80d8
99 lines
2.8 KiB
C++
99 lines
2.8 KiB
C++
//===- LLLexer.h - Lexer for LLVM Assembly Files ----------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This class represents the Lexer for .ll files.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LIB_ASMPARSER_LLLEXER_H
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#define LIB_ASMPARSER_LLLEXER_H
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#include "LLToken.h"
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#include "llvm/ADT/APFloat.h"
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#include "llvm/ADT/APSInt.h"
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#include "llvm/Support/SourceMgr.h"
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#include <string>
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namespace llvm {
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class MemoryBuffer;
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class Type;
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class SMDiagnostic;
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class LLVMContext;
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class LLLexer {
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const char *CurPtr;
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MemoryBuffer *CurBuf;
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SMDiagnostic &ErrorInfo;
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SourceMgr &SM;
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LLVMContext &Context;
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// Information about the current token.
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const char *TokStart;
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lltok::Kind CurKind;
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std::string StrVal;
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unsigned UIntVal;
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Type *TyVal;
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APFloat APFloatVal;
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APSInt APSIntVal;
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public:
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explicit LLLexer(MemoryBuffer *StartBuf, SourceMgr &SM, SMDiagnostic &,
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LLVMContext &C);
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~LLLexer() {}
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lltok::Kind Lex() {
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return CurKind = LexToken();
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}
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typedef SMLoc LocTy;
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LocTy getLoc() const { return SMLoc::getFromPointer(TokStart); }
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lltok::Kind getKind() const { return CurKind; }
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const std::string &getStrVal() const { return StrVal; }
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Type *getTyVal() const { return TyVal; }
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unsigned getUIntVal() const { return UIntVal; }
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const APSInt &getAPSIntVal() const { return APSIntVal; }
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const APFloat &getAPFloatVal() const { return APFloatVal; }
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bool Error(LocTy L, const Twine &Msg) const;
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bool Error(const Twine &Msg) const { return Error(getLoc(), Msg); }
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void Warning(LocTy WarningLoc, const Twine &Msg) const;
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void Warning(const Twine &Msg) const { return Warning(getLoc(), Msg); }
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std::string getFilename() const;
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private:
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lltok::Kind LexToken();
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int getNextChar();
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void SkipLineComment();
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lltok::Kind ReadString(lltok::Kind kind);
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bool ReadVarName();
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lltok::Kind LexIdentifier();
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lltok::Kind LexDigitOrNegative();
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lltok::Kind LexPositive();
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lltok::Kind LexAt();
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lltok::Kind LexDollar();
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lltok::Kind LexExclaim();
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lltok::Kind LexPercent();
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lltok::Kind LexQuote();
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lltok::Kind Lex0x();
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lltok::Kind LexHash();
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uint64_t atoull(const char *Buffer, const char *End);
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uint64_t HexIntToVal(const char *Buffer, const char *End);
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void HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]);
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void FP80HexToIntPair(const char *Buff, const char *End, uint64_t Pair[2]);
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};
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} // end namespace llvm
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#endif
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