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/InMemoryModuleCache.cpp      | 80 ++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 contrib/llvm-project/clang/lib/Serialization/InMemoryModuleCache.cpp

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

diff --git a/contrib/llvm-project/clang/lib/Serialization/InMemoryModuleCache.cpp b/contrib/llvm-project/clang/lib/Serialization/InMemoryModuleCache.cpp
new file mode 100644
index 000000000000..d35fa2a807f4
--- /dev/null
+++ b/contrib/llvm-project/clang/lib/Serialization/InMemoryModuleCache.cpp
@@ -0,0 +1,80 @@
+//===- InMemoryModuleCache.cpp - Cache for loaded memory buffers ----------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Serialization/InMemoryModuleCache.h"
+#include "llvm/Support/MemoryBuffer.h"
+
+using namespace clang;
+
+InMemoryModuleCache::State
+InMemoryModuleCache::getPCMState(llvm::StringRef Filename) const {
+  auto I = PCMs.find(Filename);
+  if (I == PCMs.end())
+    return Unknown;
+  if (I->second.IsFinal)
+    return Final;
+  return I->second.Buffer ? Tentative : ToBuild;
+}
+
+llvm::MemoryBuffer &
+InMemoryModuleCache::addPCM(llvm::StringRef Filename,
+                            std::unique_ptr<llvm::MemoryBuffer> Buffer) {
+  auto Insertion = PCMs.insert(std::make_pair(Filename, std::move(Buffer)));
+  assert(Insertion.second && "Already has a PCM");
+  return *Insertion.first->second.Buffer;
+}
+
+llvm::MemoryBuffer &
+InMemoryModuleCache::addBuiltPCM(llvm::StringRef Filename,
+                                 std::unique_ptr<llvm::MemoryBuffer> Buffer) {
+  auto &PCM = PCMs[Filename];
+  assert(!PCM.IsFinal && "Trying to override finalized PCM?");
+  assert(!PCM.Buffer && "Trying to override tentative PCM?");
+  PCM.Buffer = std::move(Buffer);
+  PCM.IsFinal = true;
+  return *PCM.Buffer;
+}
+
+llvm::MemoryBuffer *
+InMemoryModuleCache::lookupPCM(llvm::StringRef Filename) const {
+  auto I = PCMs.find(Filename);
+  if (I == PCMs.end())
+    return nullptr;
+  return I->second.Buffer.get();
+}
+
+bool InMemoryModuleCache::isPCMFinal(llvm::StringRef Filename) const {
+  return getPCMState(Filename) == Final;
+}
+
+bool InMemoryModuleCache::shouldBuildPCM(llvm::StringRef Filename) const {
+  return getPCMState(Filename) == ToBuild;
+}
+
+bool InMemoryModuleCache::tryToDropPCM(llvm::StringRef Filename) {
+  auto I = PCMs.find(Filename);
+  assert(I != PCMs.end() && "PCM to remove is unknown...");
+
+  auto &PCM = I->second;
+  assert(PCM.Buffer && "PCM to remove is scheduled to be built...");
+
+  if (PCM.IsFinal)
+    return true;
+
+  PCM.Buffer.reset();
+  return false;
+}
+
+void InMemoryModuleCache::finalizePCM(llvm::StringRef Filename) {
+  auto I = PCMs.find(Filename);
+  assert(I != PCMs.end() && "PCM to finalize is unknown...");
+
+  auto &PCM = I->second;
+  assert(PCM.Buffer && "Trying to finalize a dropped PCM...");
+  PCM.IsFinal = true;
+}
-- 
cgit v1.2.3