Fix another vestige of the 32-bit PowerPC backend.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15918 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPC64ISelSimple.cpp b/lib/Target/PowerPC/PPC64ISelSimple.cpp
index 9c4fb3c..18ea84c 100644
--- a/lib/Target/PowerPC/PPC64ISelSimple.cpp
+++ b/lib/Target/PowerPC/PPC64ISelSimple.cpp
@@ -2558,10 +2558,8 @@
       else
         BuildMI(*MBB, IP, PPC::EXTSH, 1, DestReg).addReg(SrcReg);
       break;
-    case cLong:
-      ++SrcReg;
-      // Fall through
     case cInt:
+    case cLong:
       if (DestClass == cByte)
         BuildMI(*MBB, IP, PPC::EXTSB, 1, DestReg).addReg(SrcReg);
       else if (DestClass == cShort)