[llvm] [NFC][CGData] Add assert to `StableFunctionMap::at` (PR #164564)

[Abhishek Kaushik via llvm-commits]

https://github.com/abhishek-kaushik22 created https://github.com/llvm/llvm-project/pull/164564

Add assert to `StableFunctionMap::at` to verify `FunctionHash` exists.

>From 0e1076de378941541b12736865436be34160ca0e Mon Sep 17 00:00:00 2001
From: Abhishek Kaushik <abhishek.kaushik at intel.com>
Date: Wed, 22 Oct 2025 12:39:57 +0530
Subject: [PATCH] [NFC][CGData] Add assert to `StableFunctionMap::at`

Add assert to `StableFunctionMap::at` to verify `FunctionHash` exists.
---
 llvm/lib/CGData/StableFunctionMap.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/llvm/lib/CGData/StableFunctionMap.cpp b/llvm/lib/CGData/StableFunctionMap.cpp
index 46e04bd850104..d0fae3a9d32f0 100644
--- a/llvm/lib/CGData/StableFunctionMap.cpp
+++ b/llvm/lib/CGData/StableFunctionMap.cpp
@@ -137,6 +137,7 @@ size_t StableFunctionMap::size(SizeType Type) const {
 const StableFunctionMap::StableFunctionEntries &
 StableFunctionMap::at(HashFuncsMapType::key_type FunctionHash) const {
   auto It = HashToFuncs.find(FunctionHash);
+  assert(It != HashToFuncs.end() && "FunctionHash not found!");
   if (isLazilyLoaded())
     deserializeLazyLoadingEntry(It);
   return It->second.Entries;