Index: lib/Transforms/IPO/BlockExtractor.cpp
===================================================================
--- lib/Transforms/IPO/BlockExtractor.cpp
+++ lib/Transforms/IPO/BlockExtractor.cpp
@@ -94,7 +94,7 @@
     if (LineSplit.empty())
       continue;
     SmallVector<StringRef, 4> BBNames;
-    LineSplit[1].split(BBNames, ',', /*MaxSplit=*/-1,
+    LineSplit[1].split(BBNames, ';', /*MaxSplit=*/-1,
                        /*KeepEmpty=*/false);
     if (BBNames.empty())
       report_fatal_error("Missing bbs name");
Index: test/Transforms/BlockExtractor/extract-blocks-with-groups.ll
===================================================================
--- test/Transforms/BlockExtractor/extract-blocks-with-groups.ll
+++ test/Transforms/BlockExtractor/extract-blocks-with-groups.ll
@@ -1,8 +1,8 @@
 ; Extract the 'if', 'then', and 'else' blocks into the same function.
-; RUN: echo 'foo if,then,else' > %t
+; RUN: echo 'foo if;then;else' > %t
 ; Make sure we can still extract a single basic block
 ; RUN: echo 'foo end' >> %t
-; RUN: echo 'bar bb14,bb20' >> %t
+; RUN: echo 'bar bb14;bb20' >> %t
 ; RUN: opt -S -extract-blocks -extract-blocks-file=%t %s | FileCheck %s
 
 ; CHECK-LABEL: foo