rename hasVariableOperands() -> isVariadic().  Add some comments.
Evan, please review the comments I added to getNumDefs to make sure
that they are accurate, thx.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45687 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index 99bc222..d040bd4 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -488,8 +488,7 @@
 ///
 bool MachineInstr::OperandsComplete() const {
   unsigned short NumOperands = TID->getNumOperands();
-  if (TID->hasVariableOperands() == 0 &&
-      getNumOperands()-NumImplicitOps >= NumOperands)
+  if (!TID->isVariadic() && getNumOperands()-NumImplicitOps >= NumOperands)
     return true;  // Broken: we have all the operands of this instruction!
   return false;
 }
@@ -498,7 +497,7 @@
 ///
 unsigned MachineInstr::getNumExplicitOperands() const {
   unsigned NumOperands = TID->getNumOperands();
-  if (TID->hasVariableOperands() == 0)
+  if (!TID->isVariadic())
     return NumOperands;
 
   for (unsigned e = getNumOperands(); NumOperands != e; ++NumOperands) {