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