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

[Kazu Hirata]

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

None

>From e237ab433d381c6562647e4fff87a0bf40ca8897 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Mon, 7 Oct 2024 07:07:55 -0700
Subject: [PATCH] [Transforms] Avoid repeated hash lookups (NFC)

---
 mlir/lib/Transforms/Utils/RegionUtils.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

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).