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IR: Function summary representation for type tests.

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Each function summary has an attached list of type identifier GUIDs. The
idea is that during the regular LTO phase we would match these GUIDs to type
identifiers defined by the regular LTO module and store the resolutions in
a top-level "type identifier summary" (which will be implemented separately).

Differential Revision: https://reviews.llvm.org/D27967

llvm-svn: 290280
This commit is contained in:
Peter Collingbourne
2016-12-21 23:03:45 +00:00
parent 76a60a8ccd
commit 1b4137a7f9
8 changed files with 102 additions and 10 deletions
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14
llvm/lib/Bitcode/Reader/BitcodeReader.cpp
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@@ -4847,6 +4847,7 @@ Error ModuleSummaryIndexBitcodeReader::parseEntireSummary(
// "OriginalName" attachement.
GlobalValueSummary *LastSeenSummary = nullptr;
bool Combined = false;
std::vector<GlobalValue::GUID> PendingTypeTests;
while (true) {
BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
@@ -4912,7 +4913,8 @@ Error ModuleSummaryIndexBitcodeReader::parseEntireSummary(
ArrayRef<uint64_t>(Record).slice(CallGraphEdgeStartIndex),
IsOldProfileFormat, HasProfile);
auto FS = llvm::make_unique<FunctionSummary>(
Flags, InstCount, std::move(Refs), std::move(Calls));
Flags, InstCount, std::move(Refs), std::move(Calls),
std::move(PendingTypeTests));
auto GUID = getGUIDFromValueId(ValueID);
FS->setModulePath(TheIndex.addModulePath(ModulePath, 0)->first());
FS->setOriginalName(GUID.second);
@@ -4985,7 +4987,8 @@ Error ModuleSummaryIndexBitcodeReader::parseEntireSummary(
IsOldProfileFormat, HasProfile);
GlobalValue::GUID GUID = getGUIDFromValueId(ValueID).first;
auto FS = llvm::make_unique<FunctionSummary>(
Flags, InstCount, std::move(Refs), std::move(Edges));
Flags, InstCount, std::move(Refs), std::move(Edges),
std::move(PendingTypeTests));
LastSeenSummary = FS.get();
FS->setModulePath(ModuleIdMap[ModuleId]);
TheIndex.addGlobalValueSummary(GUID, std::move(FS));
@@ -5041,6 +5044,13 @@ Error ModuleSummaryIndexBitcodeReader::parseEntireSummary(
LastSeenSummary->setOriginalName(OriginalName);
// Reset the LastSeenSummary
LastSeenSummary = nullptr;
break;
}
case bitc::FS_TYPE_TESTS: {
assert(PendingTypeTests.empty());
PendingTypeTests.insert(PendingTypeTests.end(), Record.begin(),
Record.end());
break;
}
}
}