llvm/lib/MC/MCParser/MCAsmParserExtension.cpp

   1 //===- MCAsmParserExtension.cpp - Asm Parser Hooks ------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/MC/MCParser/MCAsmParserExtension.h"
  10 #include "llvm/MC/MCContext.h"
  11 #include "llvm/MC/MCStreamer.h"
  12
  13 using namespace llvm;
  14
  15 MCAsmParserExtension::MCAsmParserExtension() = default;
  16
  17 MCAsmParserExtension::~MCAsmParserExtension() = default;
  18
  19 void MCAsmParserExtension::Initialize(MCAsmParser &Parser) {
  20   this->Parser = &Parser;
  21 }
  22
  23 /// ParseDirectiveCGProfile
  24 ///  ::= .cg_profile identifier, identifier, <number>
  25 bool MCAsmParserExtension::ParseDirectiveCGProfile(StringRef, SMLoc) {
  26   StringRef From;
  27   SMLoc FromLoc = getLexer().getLoc();
  28   if (getParser().parseIdentifier(From))
  29     return TokError("expected identifier in directive");
  30
  31   if (getLexer().isNot(AsmToken::Comma))
  32     return TokError("expected a comma");
  33   Lex();
  34
  35   StringRef To;
  36   SMLoc ToLoc = getLexer().getLoc();
  37   if (getParser().parseIdentifier(To))
  38     return TokError("expected identifier in directive");
  39
  40   if (getLexer().isNot(AsmToken::Comma))
  41     return TokError("expected a comma");
  42   Lex();
  43
  44   int64_t Count;
  45   if (getParser().parseIntToken(
  46           Count, "expected integer count in '.cg_profile' directive"))
  47     return true;
  48
  49   if (getLexer().isNot(AsmToken::EndOfStatement))
  50     return TokError("unexpected token in directive");
  51
  52   MCSymbol *FromSym = getContext().getOrCreateSymbol(From);
  53   MCSymbol *ToSym = getContext().getOrCreateSymbol(To);
  54
  55   getStreamer().emitCGProfileEntry(
  56       MCSymbolRefExpr::create(FromSym, MCSymbolRefExpr::VK_None, getContext(),
  57                               FromLoc),
  58       MCSymbolRefExpr::create(ToSym, MCSymbolRefExpr::VK_None, getContext(),
  59                               ToLoc),
  60       Count);
  61   return false;
  62 }