Add more plumbing. This time in the LowerArguments and "get" functions which
return partial registers. This affected the back-end lowering code some.

Also patch up some places I missed before in the "get" functions.

llvm-svn: 91880
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
index 870e343..8248c94 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -1333,7 +1333,7 @@
                 false, false, false, false, 0, CallingConv::C, false,
                 /*isReturnValueUsed=*/true,
                 DAG.getExternalSymbol("__trampoline_setup", PtrVT),
-                Args, DAG, dl);
+                Args, DAG, dl, DAG.GetOrdering(Chain.getNode()));
 
   SDValue Ops[] =
     { CallResult.first, CallResult.second };