================
@@ -1558,6 +1562,60 @@ class InProcessThinBackend : public ThinBackendProc {
return BackendThreadPool.getMaxConcurrency();
}
};
+
+/// This Backend will run ThinBackend process but throw away all the output
from
+/// the codegen. This class facilitates the first codegen round.
+class NoOutputThinBackend : public InProcessThinBackend {
+public:
+ NoOutputThinBackend(
+ const Config &Conf, ModuleSummaryIndex &CombinedIndex,
+ ThreadPoolStrategy ThinLTOParallelism,
+ const DenseMap<StringRef, GVSummaryMapTy> &ModuleToDefinedGVSummaries,
+ std::unique_ptr<std::vector<llvm::SmallString<0>>> Scratch)
+ : InProcessThinBackend(
+ Conf, CombinedIndex, ThinLTOParallelism,
ModuleToDefinedGVSummaries,
+ // Allocate a scratch buffer for each task to write output to.
+ [Allocation = &*Scratch](unsigned Task, const Twine &ModuleName) {
+ return std::make_unique<CachedFileStream>(
+ std::make_unique<raw_svector_ostream>((*Allocation)[Task]));
+ },
+ FileCache(), nullptr, false, false),
----------------
NuriAmari wrote:
Do you mind labelling these arguments with a comment including the name of the
parameter like you've done below: `/*CodeGenOnly=*/true`. Same with the
`OptimizedBitcodeThinBackend` constructor.
https://github.com/llvm/llvm-project/pull/90933
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