1 files changed, 104 insertions, 0 deletions
diff --git a/llvm/include/llvm/AsmParser/LLLexer.h b/llvm/include/llvm/AsmParser/LLLexer.h
new file mode 100644
index 000000000000..c97d9781c33b
--- /dev/null
+++ b/llvm/include/llvm/AsmParser/LLLexer.h
@@ -0,0 +1,104 @@
+//===- LLLexer.h - Lexer for LLVM Assembly Files ----------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This class represents the Lexer for .ll files.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_ASMPARSER_LLLEXER_H
+#define LLVM_LIB_ASMPARSER_LLLEXER_H
+
+#include "LLToken.h"
+#include "llvm/ADT/APFloat.h"
+#include "llvm/ADT/APSInt.h"
+#include "llvm/Support/SMLoc.h"
+#include <string>
+
+namespace llvm {
+  class Type;
+  class SMDiagnostic;
+  class SourceMgr;
+  class LLVMContext;
+
+  class LLLexer {
+    const char *CurPtr;
+    StringRef CurBuf;
+    SMDiagnostic &ErrorInfo;
+    SourceMgr &SM;
+    LLVMContext &Context;
+
+    // Information about the current token.
+    const char *TokStart;
+    lltok::Kind CurKind;
+    std::string StrVal;
+    unsigned UIntVal;
+    Type *TyVal;
+    APFloat APFloatVal;
+    APSInt  APSIntVal;
+
+    // When false (default), an identifier ending in ':' is a label token.
+    // When true, the ':' is treated as a separate token.
+    bool IgnoreColonInIdentifiers;
+
+  public:
+    explicit LLLexer(StringRef StartBuf, SourceMgr &SM, SMDiagnostic &,
+                     LLVMContext &C);
+
+    lltok::Kind Lex() {
+      return CurKind = LexToken();
+    }
+
+    typedef SMLoc LocTy;
+    LocTy getLoc() const { return SMLoc::getFromPointer(TokStart); }
+    lltok::Kind getKind() const { return CurKind; }
+    const std::string &getStrVal() const { return StrVal; }
+    Type *getTyVal() const { return TyVal; }
+    unsigned getUIntVal() const { return UIntVal; }
+    const APSInt &getAPSIntVal() const { return APSIntVal; }
+    const APFloat &getAPFloatVal() const { return APFloatVal; }
+
+    void setIgnoreColonInIdentifiers(bool val) {
+      IgnoreColonInIdentifiers = val;
+    }
+
+    bool Error(LocTy ErrorLoc, const Twine &Msg) const;
+    bool Error(const Twine &Msg) const { return Error(getLoc(), Msg); }
+
+    void Warning(LocTy WarningLoc, const Twine &Msg) const;
+    void Warning(const Twine &Msg) const { return Warning(getLoc(), Msg); }
+
+  private:
+    lltok::Kind LexToken();
+
+    int getNextChar();
+    void SkipLineComment();
+    lltok::Kind ReadString(lltok::Kind kind);
+    bool ReadVarName();
+
+    lltok::Kind LexIdentifier();
+    lltok::Kind LexDigitOrNegative();
+    lltok::Kind LexPositive();
+    lltok::Kind LexAt();
+    lltok::Kind LexDollar();
+    lltok::Kind LexExclaim();
+    lltok::Kind LexPercent();
+    lltok::Kind LexUIntID(lltok::Kind Token);
+    lltok::Kind LexVar(lltok::Kind Var, lltok::Kind VarID);
+    lltok::Kind LexQuote();
+    lltok::Kind Lex0x();
+    lltok::Kind LexHash();
+    lltok::Kind LexCaret();
+
+    uint64_t atoull(const char *Buffer, const char *End);
+    uint64_t HexIntToVal(const char *Buffer, const char *End);
+    void HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]);
+    void FP80HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]);
+  };
+} // end namespace llvm
+
+#endif