As I wrote in the docs, simple is the default spiller :-)

llvm-svn: 12189
diff --git a/llvm/lib/CodeGen/VirtRegMap.cpp b/llvm/lib/CodeGen/VirtRegMap.cpp
index 4306caa..d2c53d5 100644
--- a/llvm/lib/CodeGen/VirtRegMap.cpp
+++ b/llvm/lib/CodeGen/VirtRegMap.cpp
@@ -45,8 +45,7 @@
                cl::values(clEnumVal(simple, "  simple spiller"),
                           clEnumVal(local,  "  local spiller"),
                           0),
-//               cl::init(local));
-               cl::init(simple));
+               cl::init(local));
 }
 
 int VirtRegMap::assignVirt2StackSlot(unsigned virtReg)