[llvm] [ExecutionEngine] Avoid repeated hash lookups (NFC) (PR #111275)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/111275

None

>From 0c1eea87e4726fbd72ad3664ae49244fdae8125e Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sat, 5 Oct 2024 10:30:06 -0700
Subject: [PATCH] [ExecutionEngine] Avoid repeated hash lookups (NFC)

---
 .../ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp    | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
index 92f37c22ae5132..25b76c7668350b 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
@@ -1610,13 +1610,10 @@ RuntimeDyldELF::processRelocationRef(
     RelocationEntry RE(SectionID, Offset, RelType, Value.Addend);
     if (r_type == ELF::R_MIPS_CALL16 || r_type == ELF::R_MIPS_GOT_PAGE
         || r_type == ELF::R_MIPS_GOT_DISP) {
-      StringMap<uint64_t>::iterator i = GOTSymbolOffsets.find(TargetName);
-      if (i != GOTSymbolOffsets.end())
-        RE.SymOffset = i->second;
-      else {
-        RE.SymOffset = allocateGOTEntries(1);
-        GOTSymbolOffsets[TargetName] = RE.SymOffset;
-      }
+      auto [I, Inserted] = GOTSymbolOffsets.try_emplace(TargetName);
+      if (Inserted)
+        I->second = allocateGOTEntries(1);
+      RE.SymOffset = I->second;
       if (Value.SymbolName)
         addRelocationForSymbol(RE, Value.SymbolName);
       else