[llvm] [Transforms] Avoid repeated hash lookups (NFC) (PR #131554)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/131554

None

>From 4c97f5b14c325cc89dfc6434a229d73ac370f358 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sun, 16 Mar 2025 09:40:06 -0700
Subject: [PATCH] [Transforms] Avoid repeated hash lookups (NFC)

---
 llvm/lib/Transforms/IPO/AttributorAttributes.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

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