Allow getBlockFreq to return 0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135742 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 4 deletions

diff --git a/include/llvm/Analysis/BlockFrequencyImpl.h b/include/llvm/Analysis/BlockFrequencyImpl.h
index 6580fd1e4a..5a22b519f1 100644
--- a/include/llvm/Analysis/BlockFrequencyImpl.h
+++ b/include/llvm/Analysis/BlockFrequencyImpl.h
@@ -314,13 +314,12 @@ class BlockFrequencyImpl {
   }
 
 public:
-  /// getBlockFreq - Return block frequency. Never return 0, value must be
-  /// positive.
+  /// getBlockFreq - Return block frequency. Return 0 if we don't have it.
   uint32_t getBlockFreq(BlockT *BB) const {
     typename DenseMap<BlockT *, uint32_t>::const_iterator I = Freqs.find(BB);
     if (I != Freqs.end())
-      return I->second ? I->second : 1;
-    return 1;
+      return I->second;
+    return 0;
   }
 
   void print(raw_ostream &OS) const {