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//===- MCAsmParserExtension.cpp - Asm Parser Hooks ------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCParser/MCAsmParserExtension.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCParser/AsmLexer.h"
#include "llvm/MC/MCStreamer.h"
using namespace llvm;
MCAsmParserExtension::MCAsmParserExtension() = default;
MCAsmParserExtension::~MCAsmParserExtension() = default;
void MCAsmParserExtension::Initialize(MCAsmParser &Parser) {
this->Parser = &Parser;
}
/// parseDirectiveCGProfile
/// ::= .cg_profile identifier, identifier, <number>
bool MCAsmParserExtension::parseDirectiveCGProfile(StringRef, SMLoc) {
StringRef From;
SMLoc FromLoc = getLexer().getLoc();
if (getParser().parseIdentifier(From))
return TokError("expected identifier in directive");
if (getLexer().isNot(AsmToken::Comma))
return TokError("expected a comma");
Lex();
StringRef To;
SMLoc ToLoc = getLexer().getLoc();
if (getParser().parseIdentifier(To))
return TokError("expected identifier in directive");
if (getLexer().isNot(AsmToken::Comma))
return TokError("expected a comma");
Lex();
int64_t Count;
if (getParser().parseIntToken(Count))
return true;
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in directive");
MCSymbol *FromSym = getContext().getOrCreateSymbol(From);
MCSymbol *ToSym = getContext().getOrCreateSymbol(To);
getStreamer().emitCGProfileEntry(
MCSymbolRefExpr::create(FromSym, getContext(), FromLoc),
MCSymbolRefExpr::create(ToSym, getContext(), ToLoc), Count);
return false;
}
bool MCAsmParserExtension::maybeParseUniqueID(int64_t &UniqueID) {
AsmLexer &L = getLexer();
if (L.isNot(AsmToken::Comma))
return false;
Lex();
StringRef UniqueStr;
if (getParser().parseIdentifier(UniqueStr))
return TokError("expected identifier");
if (UniqueStr != "unique")
return TokError("expected 'unique'");
if (L.isNot(AsmToken::Comma))
return TokError("expected commma");
Lex();
if (getParser().parseAbsoluteExpression(UniqueID))
return true;
if (UniqueID < 0)
return TokError("unique id must be positive");
if (!isUInt<32>(UniqueID) || UniqueID == ~0U)
return TokError("unique id is too large");
return false;
}
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