[PATCH] D23082: [AutoFDO] Fix handling of empty profiles

[David Callahan via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL277849: [AutoFDO] Fix handling of empty profiles (authored by david2050).

Changed prior to commit:
  https://reviews.llvm.org/D23082?vs=66542&id=66988#toc

Repository:
  rL LLVM

https://reviews.llvm.org/D23082

Files:
  llvm/trunk/lib/IR/Function.cpp

Index: llvm/trunk/lib/IR/Function.cpp
===================================================================
--- llvm/trunk/lib/IR/Function.cpp
+++ llvm/trunk/lib/IR/Function.cpp
@@ -1262,7 +1262,10 @@
     if (MDString *MDS = dyn_cast<MDString>(MD->getOperand(0)))
       if (MDS->getString().equals("function_entry_count")) {
         ConstantInt *CI = mdconst::extract<ConstantInt>(MD->getOperand(1));
-        return CI->getValue().getZExtValue();
+        uint64_t Count = CI->getValue().getZExtValue();
+        if (Count == 0)
+          return None;
+        return Count;
       }
   return None;
 }


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