[BOLT] Fix begin decrementing

Summary: Fix begin decrementing. (cherry picked from FBD20232474)
llvm · Mar 3, 2020 · b0cbb60 · b0cbb60
1 parent d89bb53
commit b0cbb60
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/bolt/src/BinaryContext.cpp b/bolt/src/BinaryContext.cpp
@@ -888,7 +888,7 @@ BinaryContext::getBinaryDataContainingAddressImpl(uint64_t Address,
   auto NI = BinaryDataMap.lower_bound(Address);
   auto End = BinaryDataMap.end();
   if ((NI != End && Address == NI->first && !IncludeEnd) ||
-      (NI-- != BinaryDataMap.begin())) {
+      ((NI != BinaryDataMap.begin()) && (NI-- != BinaryDataMap.begin()))) {
     if (NI->second->containsAddress(Address) ||
         (IncludeEnd && NI->second->getEndAddress() == Address)) {
       while (BestFit &&