[llvm] [SLP][NFC] Simplify `count_if` to `count` (PR #149072)

[Piotr Fusik via llvm-commits]

https://github.com/pfusik created https://github.com/llvm/llvm-project/pull/149072

None

>From d38d1c8299d3eae2dea079ff91ed040ef6af7ac2 Mon Sep 17 00:00:00 2001
From: Piotr Fusik <p.fusik at samsung.com>
Date: Wed, 16 Jul 2025 12:45:36 +0200
Subject: [PATCH] [SLP][NFC] Simplify `count_if` to `count`

---
 llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
index 87de28044b2ae..31b4aff0768db 100644
--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -5540,8 +5540,7 @@ BoUpSLP::findReusedOrderedScalars(const BoUpSLP::TreeEntry &TE,
       return std::max(Entries[I].front()->getVectorFactor(),
                       Entries[I].back()->getVectorFactor());
     });
-  unsigned NumUndefs =
-      count_if(CurrentOrder, [&](unsigned Idx) { return Idx == NumScalars; });
+  unsigned NumUndefs = count(CurrentOrder, NumScalars);
   if (ShuffledSubMasks.all() || (NumScalars > 2 && NumUndefs >= NumScalars / 2))
     return std::nullopt;
   return std::move(CurrentOrder);