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/MCExpr.h"
12#include "llvm/MC/MCParser/MCAsmLexer.h"
13#include "llvm/MC/MCStreamer.h"
14
15using namespace llvm;
16
17MCAsmParserExtension::MCAsmParserExtension() = default;
18
19MCAsmParserExtension::~MCAsmParserExtension() = default;
20
21void MCAsmParserExtension::Initialize(MCAsmParser &Parser) {
22 this->Parser = &Parser;
23}
24
25/// ParseDirectiveCGProfile
26/// ::= .cg_profile identifier, identifier, <number>
27bool MCAsmParserExtension::ParseDirectiveCGProfile(StringRef, SMLoc) {
28 StringRef From;
29 SMLoc FromLoc = getLexer().getLoc();
30 if (getParser().parseIdentifier(Res&: From))
31 return TokError(Msg: "expected identifier in directive");
32
33 if (getLexer().isNot(K: AsmToken::Comma))
34 return TokError(Msg: "expected a comma");
35 Lex();
36
37 StringRef To;
38 SMLoc ToLoc = getLexer().getLoc();
39 if (getParser().parseIdentifier(Res&: To))
40 return TokError(Msg: "expected identifier in directive");
41
42 if (getLexer().isNot(K: AsmToken::Comma))
43 return TokError(Msg: "expected a comma");
44 Lex();
45
46 int64_t Count;
47 if (getParser().parseIntToken(
48 V&: Count, ErrMsg: "expected integer count in '.cg_profile' directive"))
49 return true;
50
51 if (getLexer().isNot(K: AsmToken::EndOfStatement))
52 return TokError(Msg: "unexpected token in directive");
53
54 MCSymbol *FromSym = getContext().getOrCreateSymbol(Name: From);
55 MCSymbol *ToSym = getContext().getOrCreateSymbol(Name: To);
56
57 getStreamer().emitCGProfileEntry(
58 From: MCSymbolRefExpr::create(Symbol: FromSym, Kind: MCSymbolRefExpr::VK_None, Ctx&: getContext(),
59 Loc: FromLoc),
60 To: MCSymbolRefExpr::create(Symbol: ToSym, Kind: MCSymbolRefExpr::VK_None, Ctx&: getContext(),
61 Loc: ToLoc),
62 Count);
63 return false;
64}
65