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/CodeGen/RegAllocLocal.cpp b/lib/CodeGen/RegAllocLocal.cpp
index 1957c16..7bb020a 100644
--- a/lib/CodeGen/RegAllocLocal.cpp
+++ b/lib/CodeGen/RegAllocLocal.cpp
@@ -261,8 +261,8 @@
     return SS;          // Already has space allocated?
 
   // Allocate a new stack object for this spill location...
-  int FrameIdx = MF->getFrameInfo()->CreateStackObject(RC->getSize(),
-                                                       RC->getAlignment(),true);
+  int FrameIdx = MF->getFrameInfo()->CreateSpillStackObject(RC->getSize(),
+                                                            RC->getAlignment());
 
   // Assign the slot...
   StackSlotForVirtReg[VirtReg] = FrameIdx;