[llvm] fb9329c - [ExecutionEngine] Avoid repeated hash lookups (NFC) (#129822)

[via llvm-commits]

Author: Kazu Hirata
Date: 2025-03-05T08:59:26-08:00
New Revision: fb9329ce15a96f568a0b0707cce1177aa5d31aff

URL: https://github.com/llvm/llvm-project/commit/fb9329ce15a96f568a0b0707cce1177aa5d31aff
DIFF: https://github.com/llvm/llvm-project/commit/fb9329ce15a96f568a0b0707cce1177aa5d31aff.diff

LOG: [ExecutionEngine] Avoid repeated hash lookups (NFC) (#129822)

Added: 
    

Modified: 
    llvm/lib/ExecutionEngine/JITLink/COFF_x86_64.cpp

Removed: 
    


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diff  --git a/llvm/lib/ExecutionEngine/JITLink/COFF_x86_64.cpp b/llvm/lib/ExecutionEngine/JITLink/COFF_x86_64.cpp
index 8ceb08051e423..30718bae15565 100644
--- a/llvm/lib/ExecutionEngine/JITLink/COFF_x86_64.cpp
+++ b/llvm/lib/ExecutionEngine/JITLink/COFF_x86_64.cpp
@@ -235,12 +235,12 @@ class COFFLinkGraphLowering_x86_64 {
 
 private:
   orc::ExecutorAddr getSectionStart(Section &Sec) {
-    if (!SectionStartCache.count(&Sec)) {
+    auto [It, Inserted] = SectionStartCache.try_emplace(&Sec);
+    if (Inserted) {
       SectionRange Range(Sec);
-      SectionStartCache[&Sec] = Range.getStart();
-      return Range.getStart();
+      It->second = Range.getStart();
     }
-    return SectionStartCache[&Sec];
+    return It->second;
   }
 
   GetImageBaseSymbol GetImageBase;