1//===-- MCTargetAsmParser.cpp - Target Assembly Parser --------------------===//
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/MCTargetAsmParser.h"
10#include "llvm/MC/MCContext.h"
11
12using namespace llvm;
13
14MCTargetAsmParser::MCTargetAsmParser(MCTargetOptions const &MCOptions,
15                                     const MCSubtargetInfo &STI,
16                                     const MCInstrInfo &MII)
17    : MCOptions(MCOptions), STI(&STI), MII(MII) {}
18
19MCTargetAsmParser::~MCTargetAsmParser() = default;
20
21MCSubtargetInfo &MCTargetAsmParser::copySTI() {
22  MCSubtargetInfo &STICopy = getContext().getSubtargetCopy(getSTI());
23  STI = &STICopy;
24  return STICopy;
25}
26
27const MCSubtargetInfo &MCTargetAsmParser::getSTI() const {
28  return *STI;
29}
30
31ParseStatus MCTargetAsmParser::parseDirective(AsmToken DirectiveID) {
32  SMLoc StartTokLoc = getTok().getLoc();
33  // Delegate to ParseDirective by default for transition period. Once the
34  // transition is over, this method should just return NoMatch.
35  bool Res = ParseDirective(DirectiveID);
36
37  // Some targets erroneously report success after emitting an error.
38  if (getParser().hasPendingError())
39    return ParseStatus::Failure;
40
41  // ParseDirective returns true if there was an error or if the directive is
42  // not target-specific. Disambiguate the two cases by comparing position of
43  // the lexer before and after calling the method: if no tokens were consumed,
44  // there was no match, otherwise there was a failure.
45  if (!Res)
46    return ParseStatus::Success;
47  if (getTok().getLoc() != StartTokLoc)
48    return ParseStatus::Failure;
49  return ParseStatus::NoMatch;
50}
51