5a9a438a54
Now that TableGen no longer relies on global Record state, we can allow for the client to own the RecordKeeper and SourceMgr. Given that TableGen internally still relies on the global llvm::SrcMgr, this method unfortunately still isn't thread-safe. Differential Revision: https://reviews.llvm.org/D125277
40 lines
1.6 KiB
C++
40 lines
1.6 KiB
C++
//===- Parser.cpp - Top-Level TableGen Parser implementation --------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/TableGen/Parser.h"
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#include "TGParser.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/TableGen/Record.h"
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using namespace llvm;
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bool llvm::TableGenParseFile(SourceMgr &InputSrcMgr, RecordKeeper &Records) {
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// Initialize the global TableGen source manager by temporarily taking control
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// of the input buffer in `SrcMgr`. This is kind of a hack, but allows for
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// preserving TableGen's current awkward diagnostic behavior. If we can remove
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// this reliance, we could drop all of this.
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SrcMgr = SourceMgr();
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SrcMgr.takeSourceBuffersFrom(InputSrcMgr);
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SrcMgr.setIncludeDirs(InputSrcMgr.getIncludeDirs());
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SrcMgr.setDiagHandler(InputSrcMgr.getDiagHandler(),
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InputSrcMgr.getDiagContext());
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// Setup the record keeper and try to parse the file.
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auto *MainFileBuffer = SrcMgr.getMemoryBuffer(SrcMgr.getMainFileID());
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Records.saveInputFilename(MainFileBuffer->getBufferIdentifier().str());
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TGParser Parser(SrcMgr, /*Macros=*/None, Records);
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bool ParseResult = Parser.ParseFile();
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// After parsing, reclaim the source manager buffers from TableGen's global
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// manager.
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InputSrcMgr.takeSourceBuffersFrom(SrcMgr);
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SrcMgr = SourceMgr();
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return ParseResult;
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}
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