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ThinLTOCodeGenerator: fix race condition found using TSAN

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From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 269588
This commit is contained in:
Mehdi Amini 2016-05-15 05:49:47 +00:00
parent 8aaea5b68f
commit 96bc72cb3b
1 changed files with 5 additions and 0 deletions
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5
lib/LTO/ThinLTOCodeGenerator.cpp
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@ -884,6 +884,11 @@ void ThinLTOCodeGenerator::run() {
auto GUIDPreservedSymbols =
computeGUIDPreservedSymbols(PreservedSymbols, TMBuilder.TheTriple);
// Make sure that every module has an entry in the ExportLists to enable
// threaded access to this map below
for (auto &DefinedGVSummaries : ModuleToDefinedGVSummaries)
ExportLists[DefinedGVSummaries.first()];
// Parallel optimizer + codegen
{
ThreadPool Pool(ThreadCount);