[clang] [ByteCode] Avoid repeated hash lookups (NFC) (PR #126379)

[Kazu Hirata via cfe-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/126379

None

>From 5f7f1eb799ce24dfa065816a7ed9772cd256f501 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sat, 8 Feb 2025 00:52:15 -0800
Subject: [PATCH] [ByteCode] Avoid repeated hash lookups (NFC)

---
 clang/lib/AST/ByteCode/Program.cpp | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/clang/lib/AST/ByteCode/Program.cpp b/clang/lib/AST/ByteCode/Program.cpp
index e0b86d46428a266..833c9ef88d770f9 100644
--- a/clang/lib/AST/ByteCode/Program.cpp
+++ b/clang/lib/AST/ByteCode/Program.cpp
@@ -18,14 +18,12 @@ using namespace clang;
 using namespace clang::interp;
 
 unsigned Program::getOrCreateNativePointer(const void *Ptr) {
-  auto It = NativePointerIndices.find(Ptr);
-  if (It != NativePointerIndices.end())
-    return It->second;
+  auto [It, Inserted] =
+      NativePointerIndices.try_emplace(Ptr, NativePointers.size());
+  if (Inserted)
+    NativePointers.push_back(Ptr);
 
-  unsigned Idx = NativePointers.size();
-  NativePointers.push_back(Ptr);
-  NativePointerIndices[Ptr] = Idx;
-  return Idx;
+  return It->second;
 }
 
 const void *Program::getNativePointer(unsigned Idx) {