[llvm] [CodeGen] Avoid repeated hash lookups (NFC) (PR #125382)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-regalloc

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/125382.diff


1 Files Affected:

- (modified) llvm/lib/CodeGen/InlineSpiller.cpp (+6-4) 


``````````diff
diff --git a/llvm/lib/CodeGen/InlineSpiller.cpp b/llvm/lib/CodeGen/InlineSpiller.cpp
index cfd247e7c3caf6..302dd37ff3d67b 100644
--- a/llvm/lib/CodeGen/InlineSpiller.cpp
+++ b/llvm/lib/CodeGen/InlineSpiller.cpp
@@ -1532,10 +1532,12 @@ void HoistSpillHelper::runHoistSpills(
     MachineBasicBlock *Block = (*RIt)->getBlock();
 
     // If Block contains an original spill, simply continue.
-    if (SpillsToKeep.contains(*RIt) && !SpillsToKeep[*RIt]) {
-      SpillsInSubTreeMap[*RIt].first.insert(*RIt);
-      // SpillsInSubTreeMap[*RIt].second contains the cost of spill.
-      SpillsInSubTreeMap[*RIt].second = MBFI.getBlockFreq(Block);
+    if (auto It = SpillsToKeep.find(*RIt);
+        It != SpillsToKeep.end() && !It->second) {
+      auto &SIt = SpillsInSubTreeMap[*RIt];
+      SIt.first.insert(*RIt);
+      // Sit.second contains the cost of spill.
+      SIt.second = MBFI.getBlockFreq(Block);
       continue;
     }
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/125382