[llvm] [TableGen] More generically handle tied source operands in CompressInstEmitter. (PR #146183)

[Rahul Joshi via llvm-commits]

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@@ -425,29 +411,26 @@ void CompressInstEmitter::createInstOperandMapping(
         continue;
 
       unsigned DagArgIdx = OpNo - TiedCount;
-      StringMap<unsigned>::iterator SourceOp =
-          SourceOperands.find(DestDag->getArgNameStr(DagArgIdx));
+      auto SourceOp = SourceOperands.find(DestDag->getArgNameStr(DagArgIdx));
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jurahul wrote:

extract DestDag->getArgNameStr(DagArgIdx) into a local var?

https://github.com/llvm/llvm-project/pull/146183