namespace llvm {
class BranchProbabilityInfo;
+class LoopInfo;
template <class BlockT> class BlockFrequencyInfoImpl;
/// BlockFrequencyInfo pass uses BlockFrequencyInfoImpl implementation to
/// estimate IR basic block frequencies.
-class BlockFrequencyInfo : public FunctionPass {
+class BlockFrequencyInfo {
typedef BlockFrequencyInfoImpl<BasicBlock> ImplType;
std::unique_ptr<ImplType> BFI;
public:
- static char ID;
-
BlockFrequencyInfo();
+ BlockFrequencyInfo(const Function &F, const BranchProbabilityInfo &BPI,
+ const LoopInfo &LI);
- ~BlockFrequencyInfo() override;
-
- void getAnalysisUsage(AnalysisUsage &AU) const override;
-
- bool runOnFunction(Function &F) override;
- void releaseMemory() override;
- void print(raw_ostream &O, const Module *M) const override;
const Function *getFunction() const;
void view() const;
/// floating points.
BlockFrequency getBlockFreq(const BasicBlock *BB) const;
+ /// calculate - compute block frequency info for the given function.
+ void calculate(const Function &F, const BranchProbabilityInfo &BPI,
+ const LoopInfo &LI);
+
// Print the block frequency Freq to OS using the current functions entry
// frequency to convert freq into a relative decimal form.
raw_ostream &printBlockFreq(raw_ostream &OS, const BlockFrequency Freq) const;
raw_ostream &printBlockFreq(raw_ostream &OS, const BasicBlock *BB) const;
uint64_t getEntryFreq() const;
+ void releaseMemory();
+ void print(raw_ostream &OS) const;
+};
+
+/// \brief Legacy analysis pass which computes \c BlockFrequencyInfo.
+class BlockFrequencyInfoWrapperPass : public FunctionPass {
+ BlockFrequencyInfo BFI;
+public:
+ static char ID;
+
+ BlockFrequencyInfoWrapperPass();
+ ~BlockFrequencyInfoWrapperPass() override;
+
+ BlockFrequencyInfo &getBFI() { return BFI; }
+ const BlockFrequencyInfo &getBFI() const { return BFI; }
+
+ void getAnalysisUsage(AnalysisUsage &AU) const override;
+
+ bool runOnFunction(Function &F) override;
+ void releaseMemory() override;
+ void print(raw_ostream &OS, const Module *M) const override;
};
}