[Mlir-commits] [mlir] [mlir] Fix use-after-move issues (PR #165660)

[Mehdi Amini]

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joker-eph wrote:

```suggestion
  StringRef functionName = matcher.getFunctionName();
  auto matches = finder.collectMatches(rootOp, std::move(matcher));

  // An extract call is recognized by considering if the matcher has a name.
  // TODO: Consider making the extract more explicit.
  if (!functionName.empty()) {
```

https://github.com/llvm/llvm-project/pull/165660