diff options
Diffstat (limited to 'include/llvm/Analysis')
| -rw-r--r-- | include/llvm/Analysis/BranchProbabilityInfo.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/llvm/Analysis/BranchProbabilityInfo.h b/include/llvm/Analysis/BranchProbabilityInfo.h index 5a17a76f5b..e40d2044dc 100644 --- a/include/llvm/Analysis/BranchProbabilityInfo.h +++ b/include/llvm/Analysis/BranchProbabilityInfo.h @@ -39,6 +39,9 @@ class BranchProbabilityInfo : public FunctionPass { // Get sum of the block successors' weights. uint32_t getSumForBlock(BasicBlock *BB) const; + // Get sum of the edge weights going to the BB block. + uint32_t getBackSumForBlock(BasicBlock *BB) const; + public: static char ID; @@ -71,6 +74,13 @@ public: // only iff SRC block has only one successor. BranchProbability getEdgeProbability(BasicBlock *Src, BasicBlock *Dst) const; + // Return a probability of getting to the DST block through SRC->DST edge. + // Returned value is a fraction between 0 (0% probability) and + // 1 (100% probability), however the value is never equal to 0, and can be 1 + // only iff DST block has only one predecesor. + BranchProbability getBackEdgeProbability(BasicBlock *Src, + BasicBlock *Dst) const; + // Print value between 0 (0% probability) and 1 (100% probability), // however the value is never equal to 0, and can be 1 only iff SRC block // has only one successor. |