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/utils/TableGen/CodeGenInstruction.cpp b/utils/TableGen/CodeGenInstruction.cpp
index ea01d1b..daab065 100644
--- a/utils/TableGen/CodeGenInstruction.cpp
+++ b/utils/TableGen/CodeGenInstruction.cpp
@@ -99,7 +99,7 @@
   mayHaveSideEffects = R->getValueAsBit("mayHaveSideEffects");
   neverHasSideEffects = R->getValueAsBit("neverHasSideEffects");
   hasOptionalDef = false;
-  hasVariableNumberOfOperands = false;
+  isVariadic = false;
 
   if (mayHaveSideEffects && neverHasSideEffects)
     throw R->getName() +
@@ -159,7 +159,7 @@
       else if (Rec->isSubClassOf("OptionalDefOperand"))
         hasOptionalDef = true;
     } else if (Rec->getName() == "variable_ops") {
-      hasVariableNumberOfOperands = true;
+      isVariadic = true;
       continue;
     } else if (!Rec->isSubClassOf("RegisterClass") && 
                Rec->getName() != "ptr_rc")