Add a bool flag to StackObjects telling whether they reference spill
slots.  The AsmPrinter will use this information to determine whether to
print a spill/reload comment.

Remove default argument values.  It's too easy to pass a wrong argument
value when multiple arguments have default values.  Make everything
explicit to trap bugs early.

Update all targets to adhere to the new interfaces..


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@87022 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/SystemZ/SystemZISelLowering.cpp b/lib/Target/SystemZ/SystemZISelLowering.cpp
index 59701a6..d6b476e 100644
--- a/lib/Target/SystemZ/SystemZISelLowering.cpp
+++ b/lib/Target/SystemZ/SystemZISelLowering.cpp
@@ -329,7 +329,7 @@
       // Create the nodes corresponding to a load from this parameter slot.
       // Create the frame index object for this incoming parameter...
       int FI = MFI->CreateFixedObject(LocVT.getSizeInBits()/8,
-                                      VA.getLocMemOffset());
+                                      VA.getLocMemOffset(), true, false);
 
       // Create the SelectionDAG nodes corresponding to a load
       // from this parameter