xref: /llvm-project/llvm/lib/MC/MCParser/MCAsmParser.cpp (revision fbd38cadf16efcb15c09574ccd6844cfb7cfc97c)
1 //===-- MCAsmParser.cpp - Abstract Asm Parser Interface -------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "llvm/MC/MCParser/MCAsmParser.h"
11 #include "llvm/ADT/Twine.h"
12 #include "llvm/MC/MCParser/MCAsmLexer.h"
13 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
14 #include "llvm/MC/MCParser/MCTargetAsmParser.h"
15 #include "llvm/Support/Debug.h"
16 #include "llvm/Support/SourceMgr.h"
17 #include "llvm/Support/raw_ostream.h"
18 using namespace llvm;
19 
20 MCAsmParser::MCAsmParser()
21     : TargetParser(nullptr), ShowParsedOperands(0), HadError(false),
22       PendingErrors() {}
23 
24 MCAsmParser::~MCAsmParser() {
25 }
26 
27 void MCAsmParser::setTargetParser(MCTargetAsmParser &P) {
28   assert(!TargetParser && "Target parser is already initialized!");
29   TargetParser = &P;
30   TargetParser->Initialize(*this);
31 }
32 
33 const AsmToken &MCAsmParser::getTok() const {
34   return getLexer().getTok();
35 }
36 
37 bool MCAsmParser::parseTokenLoc(SMLoc &Loc) {
38   Loc = getTok().getLoc();
39   return false;
40 }
41 
42 bool MCAsmParser::parseEOL(const Twine &Msg) {
43   if (getTok().getKind() == AsmToken::Hash) {
44     StringRef CommentStr = parseStringToEndOfStatement();
45     getLexer().Lex();
46     getLexer().UnLex(AsmToken(AsmToken::EndOfStatement, CommentStr));
47   }
48   if (getTok().getKind() != AsmToken::EndOfStatement)
49     return Error(getTok().getLoc(), Msg);
50   Lex();
51   return false;
52 }
53 
54 bool MCAsmParser::parseToken(AsmToken::TokenKind T, const Twine &Msg) {
55   if (T == AsmToken::EndOfStatement)
56     return parseEOL(Msg);
57   if (getTok().getKind() != T)
58     return Error(getTok().getLoc(), Msg);
59   Lex();
60   return false;
61 }
62 
63 bool MCAsmParser::parseIntToken(int64_t &V, const Twine &Msg) {
64   if (getTok().getKind() != AsmToken::Integer)
65     return TokError(Msg);
66   V = getTok().getIntVal();
67   Lex();
68   return false;
69 }
70 
71 bool MCAsmParser::parseOptionalToken(AsmToken::TokenKind T, bool &Present) {
72   Present = (getTok().getKind() == T);
73   if (Present)
74     Lex();
75   return false;
76 }
77 
78 bool MCAsmParser::check(bool P, const Twine &Msg) {
79   return check(P, getTok().getLoc(), Msg);
80 }
81 
82 bool MCAsmParser::check(bool P, SMLoc Loc, const Twine &Msg) {
83   if (P)
84     return Error(Loc, Msg);
85   return false;
86 }
87 
88 bool MCAsmParser::TokError(const Twine &Msg, SMRange Range) {
89   return Error(getLexer().getLoc(), Msg, Range);
90 }
91 
92 bool MCAsmParser::Error(SMLoc L, const Twine &Msg, SMRange Range) {
93   HadError = true;
94 
95   MCPendingError PErr;
96   PErr.Loc = L;
97   Msg.toVector(PErr.Msg);
98   PErr.Range = Range;
99   PendingErrors.push_back(PErr);
100   return true;
101 }
102 
103 bool MCAsmParser::parseExpression(const MCExpr *&Res) {
104   SMLoc L;
105   return parseExpression(Res, L);
106 }
107 
108 LLVM_DUMP_METHOD void MCParsedAsmOperand::dump() const {
109   dbgs() << "  " << *this;
110 }
111