[Mlir-commits] [mlir] [Transforms] Avoid repeated hash lookups (NFC) (PR #111470)

[llvmlistbot at llvm.org]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-mlir-core

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/111470.diff


1 Files Affected:

- (modified) mlir/lib/Transforms/Utils/RegionUtils.cpp (+1-2) 


``````````diff
diff --git a/mlir/lib/Transforms/Utils/RegionUtils.cpp b/mlir/lib/Transforms/Utils/RegionUtils.cpp
index b7d26e88230946..e55ef6eb66b9c7 100644
--- a/mlir/lib/Transforms/Utils/RegionUtils.cpp
+++ b/mlir/lib/Transforms/Utils/RegionUtils.cpp
@@ -709,8 +709,7 @@ static SmallVector<SmallVector<Value, 8>, 2> pruneRedundantArguments(
   DenseMap<Value, unsigned> firstValueToIdx;
   for (unsigned j = 0; j < numArgs; ++j) {
     Value newArg = newArguments[0][j];
-    if (!firstValueToIdx.contains(newArg))
-      firstValueToIdx[newArg] = j;
+    firstValueToIdx.try_emplace(newArg, j);
   }
 
   // Go through the first list of arguments (list 0).

``````````

</details>


https://github.com/llvm/llvm-project/pull/111470