Use i32 for shift amounts instead of i64.  This gets bisort working.

llvm-svn: 28927
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
index d969c38..a417a2d 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -250,6 +250,7 @@
   }
   
   setSetCCResultType(MVT::i32);
+  setShiftAmountType(MVT::i32);
   setSetCCResultContents(ZeroOrOneSetCCResult);
   setStackPointerRegisterToSaveRestore(PPC::R1);