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/VirtRegMap.cpp b/lib/CodeGen/VirtRegMap.cpp
index ce3eed1..c8c5d86 100644
--- a/lib/CodeGen/VirtRegMap.cpp
+++ b/lib/CodeGen/VirtRegMap.cpp
@@ -117,8 +117,8 @@
   assert(Virt2StackSlotMap[virtReg] == NO_STACK_SLOT &&
          "attempt to assign stack slot to already spilled register");
   const TargetRegisterClass* RC = MF->getRegInfo().getRegClass(virtReg);
-  int SS = MF->getFrameInfo()->CreateStackObject(RC->getSize(),
-                                              RC->getAlignment(), /*isSS*/true);
+  int SS = MF->getFrameInfo()->CreateSpillStackObject(RC->getSize(),
+                                                 RC->getAlignment());
   if (LowSpillSlot == NO_STACK_SLOT)
     LowSpillSlot = SS;
   if (HighSpillSlot == NO_STACK_SLOT || SS > HighSpillSlot)
@@ -161,8 +161,8 @@
     EmergencySpillSlots.find(RC);
   if (I != EmergencySpillSlots.end())
     return I->second;
-  int SS = MF->getFrameInfo()->CreateStackObject(RC->getSize(),
-                                              RC->getAlignment(), /*isSS*/true);
+  int SS = MF->getFrameInfo()->CreateSpillStackObject(RC->getSize(),
+                                                 RC->getAlignment());
   if (LowSpillSlot == NO_STACK_SLOT)
     LowSpillSlot = SS;
   if (HighSpillSlot == NO_STACK_SLOT || SS > HighSpillSlot)