disable switch lowering using shift/and.  It still breaks ppc bootstrap for
some reason.  :(  Will investigate.

llvm-svn: 36011
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 1f982ce..e009488 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -1678,6 +1678,7 @@
                                                     CaseRecVector& WorkList,
                                                     Value* SV,
                                                     MachineBasicBlock* Default){
+  return false;
   unsigned IntPtrBits = getSizeInBits(TLI.getPointerTy());
 
   Case& FrontCase = *CR.Range.first;