[llvm] [ExecutionEngine] Avoid repeated hash lookups (NFC) (PR #131423)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/131423

None

>From f8afcfc567fe79f5a5d92cde863f020376a23ccc Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Fri, 14 Mar 2025 07:27:27 -0700
Subject: [PATCH] [ExecutionEngine] Avoid repeated hash lookups (NFC)

---
 .../ExecutionEngine/RuntimeDyld/RuntimeDyldCOFF.cpp    | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldCOFF.cpp b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldCOFF.cpp
index 69e95654666e1..16ec136480cba 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldCOFF.cpp
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldCOFF.cpp
@@ -86,17 +86,17 @@ uint64_t RuntimeDyldCOFF::getDLLImportOffset(unsigned SectionID, StubMap &Stubs,
          "Not a DLLImport symbol?");
   RelocationValueRef Reloc;
   Reloc.SymbolName = Name.data();
-  auto I = Stubs.find(Reloc);
-  if (I != Stubs.end()) {
-    LLVM_DEBUG(dbgs() << format("{0:x8}", I->second) << "\n");
-    return I->second;
+  auto [It, Inserted] = Stubs.try_emplace(Reloc);
+  if (!Inserted) {
+    LLVM_DEBUG(dbgs() << format("{0:x8}", It->second) << "\n");
+    return It->second;
   }
 
   assert(SectionID < Sections.size() && "SectionID out of range");
   auto &Sec = Sections[SectionID];
   auto EntryOffset = alignTo(Sec.getStubOffset(), PointerSize);
   Sec.advanceStubOffset(EntryOffset + PointerSize - Sec.getStubOffset());
-  Stubs[Reloc] = EntryOffset;
+  It->second = EntryOffset;
 
   RelocationEntry RE(SectionID, EntryOffset, PointerReloc, 0, false,
                      Log2_64(PointerSize));