Index: lib/Target/X86/X86DomainReassignment.cpp
===================================================================
--- lib/Target/X86/X86DomainReassignment.cpp
+++ lib/Target/X86/X86DomainReassignment.cpp
@@ -752,6 +752,7 @@
 
   for (auto I : Converters)
     delete I.second;
+  Converters.clear();
 
   DEBUG(dbgs() << "***** Machine Function after Domain Reassignment *****\n");
   DEBUG(MF.print(dbgs()));