Remove redundant foldMemoryOperand variants and other code clean up.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44517 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocBigBlock.cpp b/lib/CodeGen/RegAllocBigBlock.cpp
index 7f402a6..227a238 100644
--- a/lib/CodeGen/RegAllocBigBlock.cpp
+++ b/lib/CodeGen/RegAllocBigBlock.cpp
@@ -520,7 +520,9 @@
     assignVirtToPhysReg(VirtReg, PhysReg);
   } else {  // no free registers available.
     // try to fold the spill into the instruction
-    if(MachineInstr* FMI = RegInfo->foldMemoryOperand(MI, OpNum, FrameIndex)) {
+    SmallVector<unsigned, 2> Ops;
+    Ops.push_back(OpNum);
+    if(MachineInstr* FMI = RegInfo->foldMemoryOperand(MI, Ops, FrameIndex)) {
       ++NumFolded;
       // Since we changed the address of MI, make sure to update live variables
       // to know that the new instruction has the properties of the old one.