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 12 using namespace llvm; 13 14 MCTargetAsmParser::MCTargetAsmParser(MCTargetOptions const &MCOptions, 15 const MCSubtargetInfo &STI, 16 const MCInstrInfo &MII) 17 : MCOptions(MCOptions), STI(&STI), MII(MII) {} 18 19 MCTargetAsmParser::~MCTargetAsmParser() = default; 20 21 MCSubtargetInfo &MCTargetAsmParser::copySTI() { 22 MCSubtargetInfo &STICopy = getContext().getSubtargetCopy(getSTI()); 23 STI = &STICopy; 24 return STICopy; 25 } 26 27 const MCSubtargetInfo &MCTargetAsmParser::getSTI() const { 28 return *STI; 29 } 30 31 ParseStatus 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