[llvm] 8789c00 - [Transforms] Avoid repeated hash lookups (NFC) (#131554)

[via llvm-commits]

Author: Kazu Hirata
Date: 2025-03-17T07:42:21-07:00
New Revision: 8789c0083de178fd044e5fb94b3a36c2eec49e0a

URL: https://github.com/llvm/llvm-project/commit/8789c0083de178fd044e5fb94b3a36c2eec49e0a
DIFF: https://github.com/llvm/llvm-project/commit/8789c0083de178fd044e5fb94b3a36c2eec49e0a.diff

LOG: [Transforms] Avoid repeated hash lookups (NFC) (#131554)

Added: 
    

Modified: 
    llvm/lib/Transforms/IPO/AttributorAttributes.cpp

Removed: 
    


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diff  --git a/llvm/lib/Transforms/IPO/AttributorAttributes.cpp b/llvm/lib/Transforms/IPO/AttributorAttributes.cpp
index 60aa758917b0b..4b7902ff502d3 100644
--- a/llvm/lib/Transforms/IPO/AttributorAttributes.cpp
+++ b/llvm/lib/Transforms/IPO/AttributorAttributes.cpp
@@ -1679,8 +1679,8 @@ ChangeStatus AAPointerInfoFloating::updateImpl(Attributor &A) {
     if (auto *PHI = dyn_cast<PHINode>(Usr)) {
       // Note the order here, the Usr access might change the map, CurPtr is
       // already in it though.
-      bool IsFirstPHIUser = !OffsetInfoMap.count(PHI);
-      auto &UsrOI = OffsetInfoMap[PHI];
+      auto [PhiIt, IsFirstPHIUser] = OffsetInfoMap.try_emplace(PHI);
+      auto &UsrOI = PhiIt->second;
       auto &PtrOI = OffsetInfoMap[CurPtr];
 
       // Check if the PHI operand has already an unknown offset as we can't