Transfer physical register spill info when load / store folding happens.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48246 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/VirtRegMap.cpp b/lib/CodeGen/VirtRegMap.cpp
index cce36e5..3b6612d 100644
--- a/lib/CodeGen/VirtRegMap.cpp
+++ b/lib/CodeGen/VirtRegMap.cpp
@@ -35,6 +35,7 @@
 using namespace llvm;
 
 STATISTIC(NumSpills, "Number of register spills");
+STATISTIC(NumPSpills,"Number of physical register spills");
 STATISTIC(NumReMats, "Number of re-materialization");
 STATISTIC(NumDRM   , "Number of re-materializable defs elided");
 STATISTIC(NumStores, "Number of stores added");
@@ -1079,7 +1080,7 @@
         TII->loadRegFromStackSlot(MBB, next(MII), PhysReg, SS, RC);
         MachineInstr *LoadMI = next(MII);
         VRM.addSpillSlotUse(SS, LoadMI);
-        ++NumSpills;
+        ++NumPSpills;
       }
     }