[llvm] [DTLTO] [LLVM] Initial DTLTO cache implementation (PR #156433)

[Katya Romanova via llvm-commits]

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@@ -2244,14 +2245,17 @@ class OutOfProcessThinBackend : public CGThinBackend {
 
   SmallVector<StringRef, 0> CodegenOptions;
   DenseSet<StringRef> CommonInputs;
-
+  std::atomic<uint64_t> CachedJobs{0};
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romanova-ekaterina wrote:

Are you suggesting to change it to 
 `std::atomic<size_t> CachedJobs{0};`
 or to 
 `size_t CachedJobs{0};`
 
 This variable is changed in the thread pool.  We cannot safely get rid of atomic because a data race will get introduced.
 

https://github.com/llvm/llvm-project/pull/156433