The assert() should reference to machine instr operand number, too.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116243 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeEmitterGen.cpp b/utils/TableGen/CodeEmitterGen.cpp
index 13eea6b..64ea16e 100644
--- a/utils/TableGen/CodeEmitterGen.cpp
+++ b/utils/TableGen/CodeEmitterGen.cpp
@@ -160,10 +160,10 @@
               // order.
               unsigned OpIdx;
               if (CGI.hasOperandNamed(VarName, OpIdx)) {
-                assert (!CGI.isFlatOperandNotEmitted(OpIdx) &&
-                        "Explicitly used operand also marked as not emitted!");
                 // Get the machine operand number for the indicated operand.
                 OpIdx = CGI.OperandList[OpIdx].MIOperandNo;
+                assert (!CGI.isFlatOperandNotEmitted(OpIdx) &&
+                        "Explicitly used operand also marked as not emitted!");
               } else {
                 /// If this operand is not supposed to be emitted by the
                 /// generated emitter, skip it.