RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-24 11:42:57 +01:00
Code Issues Projects Releases Wiki Activity

[ThinLTO] Don't perform computeDeadSymbols during O0 link, as the result is never used (NFC)

Browse Source 
llvm-svn: 292679
This commit is contained in:
Mehdi Amini 2017-01-20 23:34:12 +00:00
parent ad5b04fd3b
commit 7a9494b639
1 changed files with 13 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
lib/LTO/LTO.cpp
View File

@ -856,19 +856,6 @@ Error LTO::runThinLTO(AddStreamFn AddStream, NativeObjectCache Cache,
if (!ModuleToDefinedGVSummaries.count(Mod.first))
ModuleToDefinedGVSummaries.try_emplace(Mod.first);
// Compute "dead" symbols, we don't want to import/export these!
DenseSet<GlobalValue::GUID> GUIDPreservedSymbols;
for (auto &Res : GlobalResolutions) {
if (Res.second.VisibleOutsideThinLTO &&
// IRName will be defined if we have seen the prevailing copy of
// this value. If not, no need to preserve any ThinLTO copies.
!Res.second.IRName.empty())
GUIDPreservedSymbols.insert(GlobalValue::getGUID(Res.second.IRName));
}
auto DeadSymbols =
computeDeadSymbols(ThinLTO.CombinedIndex, GUIDPreservedSymbols);
StringMap<FunctionImporter::ImportMapTy> ImportLists(
ThinLTO.ModuleMap.size());
StringMap<FunctionImporter::ExportSetTy> ExportLists(
@ -876,6 +863,19 @@ Error LTO::runThinLTO(AddStreamFn AddStream, NativeObjectCache Cache,
StringMap<std::map<GlobalValue::GUID, GlobalValue::LinkageTypes>> ResolvedODR;
if (Conf.OptLevel > 0) {
// Compute "dead" symbols, we don't want to import/export these!
DenseSet<GlobalValue::GUID> GUIDPreservedSymbols;
for (auto &Res : GlobalResolutions) {
if (Res.second.VisibleOutsideThinLTO &&
// IRName will be defined if we have seen the prevailing copy of
// this value. If not, no need to preserve any ThinLTO copies.
!Res.second.IRName.empty())
GUIDPreservedSymbols.insert(GlobalValue::getGUID(Res.second.IRName));
}
auto DeadSymbols =
computeDeadSymbols(ThinLTO.CombinedIndex, GUIDPreservedSymbols);
ComputeCrossModuleImport(ThinLTO.CombinedIndex, ModuleToDefinedGVSummaries,
ImportLists, ExportLists, &DeadSymbols);