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/X86/X86FastISel.cpp b/lib/Target/X86/X86FastISel.cpp
index 3401df0..431c120 100644
--- a/lib/Target/X86/X86FastISel.cpp
+++ b/lib/Target/X86/X86FastISel.cpp
@@ -1493,7 +1493,7 @@
       EVT ResVT = RVLocs[0].getValVT();
       unsigned Opc = ResVT == MVT::f32 ? X86::ST_Fp80m32 : X86::ST_Fp80m64;
       unsigned MemSize = ResVT.getSizeInBits()/8;
-      int FI = MFI.CreateStackObject(MemSize, MemSize);
+      int FI = MFI.CreateStackObject(MemSize, MemSize, false);
       addFrameReference(BuildMI(MBB, DL, TII.get(Opc)), FI).addReg(ResultReg);
       DstRC = ResVT == MVT::f32
         ? X86::FR32RegisterClass : X86::FR64RegisterClass;