diff --git a/bolt/lib/Core/BinaryContext.cpp b/bolt/lib/Core/BinaryContext.cpp
--- a/bolt/lib/Core/BinaryContext.cpp
+++ b/bolt/lib/Core/BinaryContext.cpp
@@ -1561,6 +1561,8 @@
       DWOCUs[*DWOId] = DWOCU;
     }
   }
+  if (!DWOCUs.empty())
+    outs() << "BOLT-INFO: processing split DWARF\n";
 }
 
 void BinaryContext::preprocessDebugInfo() {
diff --git a/bolt/test/X86/dwarf-test-df-logging.test b/bolt/test/X86/dwarf-test-df-logging.test
new file mode 100644
--- /dev/null
+++ b/bolt/test/X86/dwarf-test-df-logging.test
@@ -0,0 +1,12 @@
+; Testing that we print out INFO message when binary has split dwarf.
+
+; RUN: mkdir -p %t
+; RUN: cd %t
+; RUN: llvm-mc -dwarf-version=4 -filetype=obj -triple x86_64-unknown-linux %p/Inputs/dwarf4-df-dualcu-main.s \
+; RUN:  -split-dwarf-file=main.dwo -o main.o
+; RUN: llvm-mc -dwarf-version=4 -filetype=obj -triple x86_64-unknown-linux %p/Inputs/dwarf4-df-dualcu-helper.s \
+; RUN:  -split-dwarf-file=helper.dwo -o helper.o
+; RUN: %clang %cflags -gdwarf-5 -gsplit-dwarf=split main.o helper.o -o main.exe
+; RUN: llvm-bolt main.exe -o main.exe.bolt --update-debug-sections | FileCheck -check-prefix=BOLT %s
+
+; BOLT: BOLT-INFO: processing split DWARF