1 //===- Parser.cpp - Top-Level TableGen Parser implementation --------------===// 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/TableGen/Parser.h" 10 #include "TGParser.h" 11 #include "llvm/Support/MemoryBuffer.h" 12 #include "llvm/TableGen/Record.h" 13 14 using namespace llvm; 15 16 bool llvm::TableGenParseFile(SourceMgr &InputSrcMgr, RecordKeeper &Records) { 17 // Initialize the global TableGen source manager by temporarily taking control 18 // of the input buffer in `SrcMgr`. This is kind of a hack, but allows for 19 // preserving TableGen's current awkward diagnostic behavior. If we can remove 20 // this reliance, we could drop all of this. 21 SrcMgr = SourceMgr(); 22 SrcMgr.takeSourceBuffersFrom(InputSrcMgr); 23 SrcMgr.setIncludeDirs(InputSrcMgr.getIncludeDirs()); 24 SrcMgr.setDiagHandler(InputSrcMgr.getDiagHandler(), 25 InputSrcMgr.getDiagContext()); 26 27 // Setup the record keeper and try to parse the file. 28 auto *MainFileBuffer = SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID()); 29 Records.saveInputFilename(MainFileBuffer->getBufferIdentifier().str()); 30 31 TGParser Parser(SrcMgr, /*Macros=*/None, Records); 32 bool ParseResult = Parser.ParseFile(); 33 34 // After parsing, reclaim the source manager buffers from TableGen's global 35 // manager. 36 InputSrcMgr.takeSourceBuffersFrom(SrcMgr); 37 SrcMgr = SourceMgr(); 38 return ParseResult; 39 } 40