| 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 | #include "llvm/MC/MCRegister.h" |
| 12 | |
| 13 | using namespace llvm; |
| 14 | |
| 15 | MCTargetAsmParser::MCTargetAsmParser(MCTargetOptions const &MCOptions, |
| 16 | const MCSubtargetInfo &STI, |
| 17 | const MCInstrInfo &MII) |
| 18 | : MCOptions(MCOptions), STI(&STI), MII(MII) {} |
| 19 | |
| 20 | MCTargetAsmParser::~MCTargetAsmParser() = default; |
| 21 | |
| 22 | MCSubtargetInfo &MCTargetAsmParser::copySTI() { |
| 23 | MCSubtargetInfo &STICopy = getContext().getSubtargetCopy(STI: getSTI()); |
| 24 | STI = &STICopy; |
| 25 | return STICopy; |
| 26 | } |
| 27 | |
| 28 | const MCSubtargetInfo &MCTargetAsmParser::getSTI() const { |
| 29 | return *STI; |
| 30 | } |
| 31 | |
| 32 | ParseStatus MCTargetAsmParser::parseDirective(AsmToken DirectiveID) { |
| 33 | SMLoc StartTokLoc = getTok().getLoc(); |
| 34 | // Delegate to ParseDirective by default for transition period. Once the |
| 35 | // transition is over, this method should just return NoMatch. |
| 36 | bool Res = ParseDirective(DirectiveID); |
| 37 | |
| 38 | // Some targets erroneously report success after emitting an error. |
| 39 | if (getParser().hasPendingError()) |
| 40 | return ParseStatus::Failure; |
| 41 | |
| 42 | // ParseDirective returns true if there was an error or if the directive is |
| 43 | // not target-specific. Disambiguate the two cases by comparing position of |
| 44 | // the lexer before and after calling the method: if no tokens were consumed, |
| 45 | // there was no match, otherwise there was a failure. |
| 46 | if (!Res) |
| 47 | return ParseStatus::Success; |
| 48 | if (getTok().getLoc() != StartTokLoc) |
| 49 | return ParseStatus::Failure; |
| 50 | return ParseStatus::NoMatch; |
| 51 | } |
| 52 | |
| 53 | bool MCTargetAsmParser::areEqualRegs(const MCParsedAsmOperand &Op1, |
| 54 | const MCParsedAsmOperand &Op2) const { |
| 55 | return Op1.isReg() && Op2.isReg() && Op1.getReg() == Op2.getReg(); |
| 56 | } |
| 57 |