[BPI] Replace weights by probabilities in BPI.

[oota-llvm.git] / include / llvm / Analysis / BranchProbabilityInfo.h

diff --git a/include/llvm/Analysis/BranchProbabilityInfo.h b/include/llvm/Analysis/BranchProbabilityInfo.h
index 69dae5e9078500c6a1cb0d6cff6bc2535f936851..cfdf218491bdbe473904e0a423a47d5f738278af 100644 (file)
--- a/include/llvm/Analysis/BranchProbabilityInfo.h
+++ b/include/llvm/Analysis/BranchProbabilityInfo.h
@@ -84,36 +84,14 @@ public:
   raw_ostream &printEdgeProbability(raw_ostream &OS, const BasicBlock *Src,
                                     const BasicBlock *Dst) const;
 
-  /// \brief Get the raw edge weight calculated for the edge.
+  /// \brief Set the raw edge probability for the given edge.
   ///
-  /// This returns the raw edge weight. It is guaranteed to fall between 1 and
-  /// UINT32_MAX. Note that the raw edge weight is not meaningful in isolation.
-  /// This interface should be very carefully, and primarily by routines that
-  /// are updating the analysis by later calling setEdgeWeight.
-  uint32_t getEdgeWeight(const BasicBlock *Src,
-                         unsigned IndexInSuccessors) const;
-
-  /// \brief Get the raw edge weight calculated for the block pair.
-  ///
-  /// This returns the sum of all raw edge weights from Src to Dst.
-  /// It is guaranteed to fall between 1 and UINT32_MAX.
-  uint32_t getEdgeWeight(const BasicBlock *Src, const BasicBlock *Dst) const;
-
-  uint32_t getEdgeWeight(const BasicBlock *Src,
-                         succ_const_iterator Dst) const;
-
-  /// \brief Set the raw edge weight for a given edge.
-  ///
-  /// This allows a pass to explicitly set the edge weight for an edge. It can
-  /// be used when updating the CFG to update and preserve the branch
+  /// This allows a pass to explicitly set the edge probability for an edge. It
+  /// can be used when updating the CFG to update and preserve the branch
   /// probability information. Read the implementation of how these edge
-  /// weights are calculated carefully before using!
-  void setEdgeWeight(const BasicBlock *Src, unsigned IndexInSuccessors,
-                     uint32_t Weight);
-
-  static uint32_t getBranchWeightStackProtector(bool IsLikely) {
-    return IsLikely ? (1u << 20) - 1 : 1;
-  }
+  /// probabilities are calculated carefully before using!
+  void setEdgeProbability(const BasicBlock *Src, unsigned IndexInSuccessors,
+                          BranchProbability Prob);
 
   static BranchProbability getBranchProbStackProtector(bool IsLikely) {
     static const BranchProbability LikelyProb((1u << 20) - 1, 1u << 20);
@@ -135,7 +113,7 @@ private:
   // weight to just "inherit" the non-zero weight of an adjacent successor.
   static const uint32_t DEFAULT_WEIGHT = 16;
 
-  DenseMap<Edge, uint32_t> Weights;
+  DenseMap<Edge, BranchProbability> Probs;
 
   /// \brief Track the last function we run over for printing.
   Function *LastF;
@@ -146,9 +124,6 @@ private:
   /// \brief Track the set of blocks that always lead to a cold call.
   SmallPtrSet<BasicBlock *, 16> PostDominatedByColdCall;
 
-  /// \brief Get sum of the block successors' weights.
-  uint32_t getSumForBlock(const BasicBlock *BB) const;
-
   bool calcUnreachableHeuristics(BasicBlock *BB);
   bool calcMetadataWeights(BasicBlock *BB);
   bool calcColdCallHeuristics(BasicBlock *BB);