[llvm] 15762ea - [Hexagon] Avoid repeated hash lookups (NFC) (#130545)

[via llvm-commits]

Author: Kazu Hirata
Date: 2025-03-10T10:17:41-07:00
New Revision: 15762ea2fa687910609fd55cc3eca82c3a04b271

URL: https://github.com/llvm/llvm-project/commit/15762ea2fa687910609fd55cc3eca82c3a04b271
DIFF: https://github.com/llvm/llvm-project/commit/15762ea2fa687910609fd55cc3eca82c3a04b271.diff

LOG: [Hexagon] Avoid repeated hash lookups (NFC) (#130545)

Added: 
    

Modified: 
    llvm/lib/Target/Hexagon/HexagonISelDAGToDAG.cpp

Removed: 
    


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diff  --git a/llvm/lib/Target/Hexagon/HexagonISelDAGToDAG.cpp b/llvm/lib/Target/Hexagon/HexagonISelDAGToDAG.cpp
index c0baf301e0624..4bb1b1eb22eba 100644
--- a/llvm/lib/Target/Hexagon/HexagonISelDAGToDAG.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonISelDAGToDAG.cpp
@@ -2022,8 +2022,9 @@ static bool isTargetConstant(const SDValue &V) {
 }
 
 unsigned HexagonDAGToDAGISel::getUsesInFunction(const Value *V) {
-  if (GAUsesInFunction.count(V))
-    return GAUsesInFunction[V];
+  auto [It, Inserted] = GAUsesInFunction.try_emplace(V);
+  if (!Inserted)
+    return It->second;
 
   unsigned Result = 0;
   const Function &CurF = CurDAG->getMachineFunction().getFunction();
@@ -2033,7 +2034,7 @@ unsigned HexagonDAGToDAGISel::getUsesInFunction(const Value *V) {
       ++Result;
   }
 
-  GAUsesInFunction[V] = Result;
+  It->second = Result;
 
   return Result;
 }