forked from OSchip/llvm-project
83 lines
3.0 KiB
C++
83 lines
3.0 KiB
C++
//===-- ModuleSummaryIndex.cpp - Module Summary Index ---------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the module index and summary classes for the
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// IR library.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/ModuleSummaryIndex.h"
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#include "llvm/ADT/StringMap.h"
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using namespace llvm;
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// Create the combined module index/summary from multiple
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// per-module instances.
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void ModuleSummaryIndex::mergeFrom(std::unique_ptr<ModuleSummaryIndex> Other,
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uint64_t NextModuleId) {
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StringRef ModPath;
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for (auto &OtherGlobalValInfoLists : *Other) {
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GlobalValue::GUID ValueGUID = OtherGlobalValInfoLists.first;
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GlobalValueInfoList &List = OtherGlobalValInfoLists.second;
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// Assert that the value info list only has one entry, since we shouldn't
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// have duplicate names within a single per-module index.
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assert(List.size() == 1);
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std::unique_ptr<GlobalValueInfo> Info = std::move(List.front());
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// Skip if there was no summary section.
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if (!Info->summary())
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continue;
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// Add the module path string ref for this module if we haven't already
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// saved a reference to it.
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if (ModPath.empty()) {
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auto Path = Info->summary()->modulePath();
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ModPath = addModulePath(Path, NextModuleId, Other->getModuleHash(Path))
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->first();
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} else
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assert(ModPath == Info->summary()->modulePath() &&
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"Each module in the combined map should have a unique ID");
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// Note the module path string ref was copied above and is still owned by
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// the original per-module index. Reset it to the new module path
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// string reference owned by the combined index.
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Info->summary()->setModulePath(ModPath);
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// Add new value info to existing list. There may be duplicates when
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// combining GlobalValueMap entries, due to COMDAT values. Any local
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// values were given unique global IDs.
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addGlobalValueInfo(ValueGUID, std::move(Info));
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}
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}
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void ModuleSummaryIndex::removeEmptySummaryEntries() {
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for (auto MI = begin(), MIE = end(); MI != MIE;) {
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// Only expect this to be called on a per-module index, which has a single
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// entry per value entry list.
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assert(MI->second.size() == 1);
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if (!MI->second[0]->summary())
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MI = GlobalValueMap.erase(MI);
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else
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++MI;
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}
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}
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GlobalValueInfo *
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ModuleSummaryIndex::getGlobalValueInfo(uint64_t ValueGUID,
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bool PerModuleIndex) const {
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auto InfoList = findGlobalValueInfoList(ValueGUID);
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assert(InfoList != end() && "GlobalValue not found in index");
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assert(!PerModuleIndex ||
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InfoList->second.size() == 1 &&
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"Expected a single entry per global value in per-module index");
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auto &Info = InfoList->second[0];
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return Info.get();
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}
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