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6c3097657a
Update swift cache key computation mechanism from one cache key per output, to one cache key per primary input file (for all outputs that associated with that input). The new schema allows fewer cache lookups while still preserving most of the flexibility for batch mode and incremental mode.
97 lines
3.3 KiB
C++
97 lines
3.3 KiB
C++
//===--- CompileJobCacheKey.cpp - compile cache key methods ---------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains utility methods for creating compile job cache keys.
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//
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//===----------------------------------------------------------------------===//
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#include "swift/Option/Options.h"
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#include <swift/Frontend/CompileJobCacheKey.h>
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#include <swift/Basic/Version.h>
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#include <llvm/ADT/SmallString.h>
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/CAS/HierarchicalTreeBuilder.h"
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#include "llvm/CAS/ObjectStore.h"
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#include "llvm/Option/ArgList.h"
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#include "llvm/Option/OptTable.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/MemoryBuffer.h"
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using namespace swift;
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// TODO: Rewrite this into CASNodeSchema.
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llvm::Expected<llvm::cas::ObjectRef> swift::createCompileJobBaseCacheKey(
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llvm::cas::ObjectStore &CAS, ArrayRef<const char *> Args) {
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// Don't count the `-frontend` in the first location since only frontend
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// invocation can have a cache key.
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if (Args.size() > 1 && StringRef(Args.front()) == "-frontend")
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Args = Args.drop_front();
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unsigned MissingIndex;
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unsigned MissingCount;
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std::unique_ptr<llvm::opt::OptTable> Table = createSwiftOptTable();
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llvm::opt::InputArgList ParsedArgs = Table->ParseArgs(
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Args, MissingIndex, MissingCount, options::FrontendOption);
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SmallString<256> CommandLine;
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for (auto *Arg : ParsedArgs) {
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const auto &Opt = Arg->getOption();
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// Skip the options that doesn't affect caching.
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if (Opt.hasFlag(options::CacheInvariant))
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continue;
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if (Opt.hasFlag(options::ArgumentIsFileList)) {
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auto FileList = llvm::MemoryBuffer::getFile(Arg->getValue());
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if (!FileList)
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return llvm::errorCodeToError(FileList.getError());
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CommandLine.append(Opt.getRenderName());
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CommandLine.push_back(0);
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CommandLine.append((*FileList)->getBuffer());
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CommandLine.push_back(0);
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continue;
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}
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CommandLine.append(Arg->getAsString(ParsedArgs));
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CommandLine.push_back(0);
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}
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llvm::cas::HierarchicalTreeBuilder Builder;
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auto CMD = CAS.storeFromString(llvm::None, CommandLine);
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if (!CMD)
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return CMD.takeError();
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Builder.push(*CMD, llvm::cas::TreeEntry::Regular, "command-line");
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// FIXME: The version is maybe insufficient...
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auto Version =
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CAS.storeFromString(llvm::None, version::getSwiftFullVersion());
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if (!Version)
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return Version.takeError();
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Builder.push(*Version, llvm::cas::TreeEntry::Regular, "version");
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if (auto Out = Builder.create(CAS))
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return Out->getRef();
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else
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return Out.takeError();
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}
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llvm::Expected<llvm::cas::ObjectRef> swift::createCompileJobCacheKeyForOutput(
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llvm::cas::ObjectStore &CAS, llvm::cas::ObjectRef BaseKey,
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StringRef ProducingInput) {
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SmallString<256> OutputInfo;
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// CacheKey is the producting input + the base key.
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OutputInfo.append(ProducingInput);
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return CAS.storeFromString({BaseKey}, OutputInfo);
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}
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