1 files changed, 39 insertions, 0 deletions
diff --git a/include/llvm/Transforms/IPO/HotColdSplitting.h b/include/llvm/Transforms/IPO/HotColdSplitting.h
index 73668844590d..8c3049fbaac4 100644
--- a/include/llvm/Transforms/IPO/HotColdSplitting.h
+++ b/include/llvm/Transforms/IPO/HotColdSplitting.h
@@ -17,6 +17,45 @@
 namespace llvm {
 
 class Module;
+class ProfileSummaryInfo;
+class BlockFrequencyInfo;
+class TargetTransformInfo;
+class OptimizationRemarkEmitter;
+class AssumptionCache;
+class DominatorTree;
+class CodeExtractorAnalysisCache;
+
+/// A sequence of basic blocks.
+///
+/// A 0-sized SmallVector is slightly cheaper to move than a std::vector.
+using BlockSequence = SmallVector<BasicBlock *, 0>;
+
+class HotColdSplitting {
+public:
+  HotColdSplitting(ProfileSummaryInfo *ProfSI,
+                   function_ref<BlockFrequencyInfo *(Function &)> GBFI,
+                   function_ref<TargetTransformInfo &(Function &)> GTTI,
+                   std::function<OptimizationRemarkEmitter &(Function &)> *GORE,
+                   function_ref<AssumptionCache *(Function &)> LAC)
+      : PSI(ProfSI), GetBFI(GBFI), GetTTI(GTTI), GetORE(GORE), LookupAC(LAC) {}
+  bool run(Module &M);
+
+private:
+  bool isFunctionCold(const Function &F) const;
+  bool shouldOutlineFrom(const Function &F) const;
+  bool outlineColdRegions(Function &F, bool HasProfileSummary);
+  Function *extractColdRegion(const BlockSequence &Region,
+                              const CodeExtractorAnalysisCache &CEAC,
+                              DominatorTree &DT, BlockFrequencyInfo *BFI,
+                              TargetTransformInfo &TTI,
+                              OptimizationRemarkEmitter &ORE,
+                              AssumptionCache *AC, unsigned Count);
+  ProfileSummaryInfo *PSI;
+  function_ref<BlockFrequencyInfo *(Function &)> GetBFI;
+  function_ref<TargetTransformInfo &(Function &)> GetTTI;
+  std::function<OptimizationRemarkEmitter &(Function &)> *GetORE;
+  function_ref<AssumptionCache *(Function &)> LookupAC;
+};
 
 /// Pass to outline cold regions.
 class HotColdSplittingPass : public PassInfoMixin<HotColdSplittingPass> {