Index: lib/Target/PowerPC/PPCTargetTransformInfo.cpp
===================================================================
--- lib/Target/PowerPC/PPCTargetTransformInfo.cpp
+++ lib/Target/PowerPC/PPCTargetTransformInfo.cpp
@@ -226,6 +226,11 @@
   if (Directive == PPC::DIR_E500mc || Directive == PPC::DIR_E5500)
     return 1;

+  // For the P8, VSU instructions have a 6-cycle latency and there are two VSU
+  // units, so unroll by 12x for latency hiding.
+  if (Directive == PPC::DIR_PWR8)
+    return 12;
+
   // For most things, modern systems have two execution units (and
   // out-of-order execution).
   return 2;