From 0b57cec536236d46e3dba9bd041533462f33dbb7 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Fri, 20 Dec 2019 19:53:05 +0000
Subject: Move all sources from the llvm project into contrib/llvm-project.

This uses the new layout of the upstream repository, which was recently
migrated to GitHub, and converted into a "monorepo".  That is, most of
the earlier separate sub-projects with their own branches and tags were
consolidated into one top-level directory, and are now branched and
tagged together.

Updating the vendor area to match this layout is next.
---
 .../lib/Serialization/PCHContainerOperations.cpp   | 68 ++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 contrib/llvm-project/clang/lib/Serialization/PCHContainerOperations.cpp

(limited to 'contrib/llvm-project/clang/lib/Serialization/PCHContainerOperations.cpp')

diff --git a/contrib/llvm-project/clang/lib/Serialization/PCHContainerOperations.cpp b/contrib/llvm-project/clang/lib/Serialization/PCHContainerOperations.cpp
new file mode 100644
index 000000000000..00063d64f3f2
--- /dev/null
+++ b/contrib/llvm-project/clang/lib/Serialization/PCHContainerOperations.cpp
@@ -0,0 +1,68 @@
+//=== Serialization/PCHContainerOperations.cpp - PCH Containers -*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file defines PCHContainerOperations and RawPCHContainerOperation.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Serialization/PCHContainerOperations.h"
+#include "clang/AST/ASTConsumer.h"
+#include "clang/Lex/ModuleLoader.h"
+#include "llvm/Bitstream/BitstreamReader.h"
+#include "llvm/Support/raw_ostream.h"
+#include <utility>
+
+using namespace clang;
+
+PCHContainerWriter::~PCHContainerWriter() {}
+PCHContainerReader::~PCHContainerReader() {}
+
+namespace {
+
+/// A PCHContainerGenerator that writes out the PCH to a flat file.
+class RawPCHContainerGenerator : public ASTConsumer {
+  std::shared_ptr<PCHBuffer> Buffer;
+  std::unique_ptr<raw_pwrite_stream> OS;
+
+public:
+  RawPCHContainerGenerator(std::unique_ptr<llvm::raw_pwrite_stream> OS,
+                           std::shared_ptr<PCHBuffer> Buffer)
+      : Buffer(std::move(Buffer)), OS(std::move(OS)) {}
+
+  ~RawPCHContainerGenerator() override = default;
+
+  void HandleTranslationUnit(ASTContext &Ctx) override {
+    if (Buffer->IsComplete) {
+      // Make sure it hits disk now.
+      *OS << Buffer->Data;
+      OS->flush();
+    }
+    // Free the space of the temporary buffer.
+    llvm::SmallVector<char, 0> Empty;
+    Buffer->Data = std::move(Empty);
+  }
+};
+
+} // anonymous namespace
+
+std::unique_ptr<ASTConsumer> RawPCHContainerWriter::CreatePCHContainerGenerator(
+    CompilerInstance &CI, const std::string &MainFileName,
+    const std::string &OutputFileName, std::unique_ptr<llvm::raw_pwrite_stream> OS,
+    std::shared_ptr<PCHBuffer> Buffer) const {
+  return llvm::make_unique<RawPCHContainerGenerator>(std::move(OS), Buffer);
+}
+
+StringRef
+RawPCHContainerReader::ExtractPCH(llvm::MemoryBufferRef Buffer) const {
+  return Buffer.getBuffer();
+}
+
+PCHContainerOperations::PCHContainerOperations() {
+  registerWriter(llvm::make_unique<RawPCHContainerWriter>());
+  registerReader(llvm::make_unique<RawPCHContainerReader>());
+}
-- 
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