forked from OSchip/llvm-project
138 lines
3.6 KiB
C++
138 lines
3.6 KiB
C++
//===-- MCAsmParser.cpp - Abstract Asm Parser Interface -------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCParser/MCAsmParser.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/Config/llvm-config.h"
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#include "llvm/MC/MCParser/MCAsmLexer.h"
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#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
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#include "llvm/MC/MCParser/MCTargetAsmParser.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/SMLoc.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cassert>
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using namespace llvm;
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MCAsmParser::MCAsmParser() : ShowParsedOperands(0) {}
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MCAsmParser::~MCAsmParser() = default;
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void MCAsmParser::setTargetParser(MCTargetAsmParser &P) {
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assert(!TargetParser && "Target parser is already initialized!");
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TargetParser = &P;
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TargetParser->Initialize(*this);
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}
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const AsmToken &MCAsmParser::getTok() const {
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return getLexer().getTok();
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}
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bool MCAsmParser::parseTokenLoc(SMLoc &Loc) {
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Loc = getTok().getLoc();
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return false;
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}
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bool MCAsmParser::parseEOL(const Twine &Msg) {
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if (getTok().getKind() != AsmToken::EndOfStatement)
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return Error(getTok().getLoc(), Msg);
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Lex();
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return false;
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}
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bool MCAsmParser::parseToken(AsmToken::TokenKind T, const Twine &Msg) {
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if (T == AsmToken::EndOfStatement)
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return parseEOL(Msg);
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if (getTok().getKind() != T)
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return Error(getTok().getLoc(), Msg);
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Lex();
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return false;
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}
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bool MCAsmParser::parseIntToken(int64_t &V, const Twine &Msg) {
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if (getTok().getKind() != AsmToken::Integer)
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return TokError(Msg);
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V = getTok().getIntVal();
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Lex();
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return false;
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}
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bool MCAsmParser::parseOptionalToken(AsmToken::TokenKind T) {
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bool Present = (getTok().getKind() == T);
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if (Present)
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parseToken(T);
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return Present;
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}
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bool MCAsmParser::check(bool P, const Twine &Msg) {
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return check(P, getTok().getLoc(), Msg);
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}
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bool MCAsmParser::check(bool P, SMLoc Loc, const Twine &Msg) {
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if (P)
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return Error(Loc, Msg);
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return false;
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}
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bool MCAsmParser::TokError(const Twine &Msg, SMRange Range) {
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return Error(getLexer().getLoc(), Msg, Range);
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}
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bool MCAsmParser::Error(SMLoc L, const Twine &Msg, SMRange Range) {
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MCPendingError PErr;
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PErr.Loc = L;
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Msg.toVector(PErr.Msg);
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PErr.Range = Range;
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PendingErrors.push_back(PErr);
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// If we threw this parsing error after a lexing error, this should
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// supercede the lexing error and so we remove it from the Lexer
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// before it can propagate
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if (getTok().is(AsmToken::Error))
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getLexer().Lex();
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return true;
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}
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bool MCAsmParser::addErrorSuffix(const Twine &Suffix) {
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// Make sure lexing errors have propagated to the parser.
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if (getTok().is(AsmToken::Error))
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Lex();
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for (auto &PErr : PendingErrors)
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Suffix.toVector(PErr.Msg);
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return true;
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}
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bool MCAsmParser::parseMany(function_ref<bool()> parseOne, bool hasComma) {
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if (parseOptionalToken(AsmToken::EndOfStatement))
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return false;
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while (true) {
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if (parseOne())
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return true;
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if (parseOptionalToken(AsmToken::EndOfStatement))
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return false;
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if (hasComma && parseToken(AsmToken::Comma))
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return true;
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}
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return false;
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}
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bool MCAsmParser::parseExpression(const MCExpr *&Res) {
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SMLoc L;
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return parseExpression(Res, L);
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}
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void MCParsedAsmOperand::dump() const {
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// Cannot completely remove virtual function even in release mode.
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#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
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dbgs() << " " << *this;
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#endif
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}
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