Index: lib/profile/InstrProfilingMergeFile.c
===================================================================
--- lib/profile/InstrProfilingMergeFile.c
+++ lib/profile/InstrProfilingMergeFile.c
@@ -21,6 +21,7 @@
 
 /* Merge value profile data pointed to by SrcValueProfData into
  * in-memory profile counters pointed by to DstData.  */
+COMPILER_RT_VISIBILITY
 void lprofMergeValueProfData(ValueProfData *SrcValueProfData,
                              __llvm_profile_data *DstData) {
   unsigned I, S, V, DstIndex = 0;