[Mlir-commits] [mlir] [mlir] Avoid repeated map lookups (NFC) (PR #113074)

[Nikita Popov]

================
@@ -1160,9 +1160,8 @@ bool mlir::sparse_tensor::isBlockSparsity(AffineMap dimToLvl) {
     } else if (auto dimOp = dyn_cast<AffineDimExpr>(result)) {
       auto pos = dimOp.getPosition();
       // Expect dim to be unset.
-      if (coeffientMap.find(pos) != coeffientMap.end())
+      if (!coeffientMap.try_emplace(pos).second)
----------------
nikic wrote:

```suggestion
      if (!coeffientMap.try_emplace(pos, 0).second)
```
I'd make the value explicit in this context...

https://github.com/llvm/llvm-project/pull/113074