[llvm] [NFC][LLVM] Namespace cleanup in Scalarizer.cpp (PR #163766)

[Rahul Joshi via llvm-commits]

https://github.com/jurahul created https://github.com/llvm/llvm-project/pull/163766

None

>From 03df03a70777ba60cec9d6f0ab3a45106f9b949b Mon Sep 17 00:00:00 2001
From: Rahul Joshi <rjoshi at nvidia.com>
Date: Thu, 16 Oct 2025 05:52:07 -0700
Subject: [PATCH] [NFC][LLVM] Namespace cleanup in Scalarizer.cpp

---
 llvm/lib/Transforms/Scalar/Scalarizer.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/llvm/lib/Transforms/Scalar/Scalarizer.cpp b/llvm/lib/Transforms/Scalar/Scalarizer.cpp
index aae5d6074ae8e..25a531ca33214 100644
--- a/llvm/lib/Transforms/Scalar/Scalarizer.cpp
+++ b/llvm/lib/Transforms/Scalar/Scalarizer.cpp
@@ -50,9 +50,7 @@ using namespace llvm;
 
 #define DEBUG_TYPE "scalarizer"
 
-namespace {
-
-BasicBlock::iterator skipPastPhiNodesAndDbg(BasicBlock::iterator Itr) {
+static BasicBlock::iterator skipPastPhiNodesAndDbg(BasicBlock::iterator Itr) {
   BasicBlock *BB = Itr->getParent();
   if (isa<PHINode>(Itr))
     Itr = BB->getFirstInsertionPt();
@@ -76,6 +74,8 @@ using ScatterMap = std::map<std::pair<Value *, Type *>, ValueVector>;
 // along with a pointer to their scattered forms.
 using GatherList = SmallVector<std::pair<Instruction *, ValueVector *>, 16>;
 
+namespace {
+
 struct VectorSplit {
   // The type of the vector.
   FixedVectorType *VecTy = nullptr;
@@ -196,6 +196,7 @@ struct VectorLayout {
   // The size of each (non-remainder) fragment in bytes.
   uint64_t SplitSize = 0;
 };
+} // namespace
 
 static bool isStructOfMatchingFixedVectors(Type *Ty) {
   if (!isa<StructType>(Ty))
@@ -268,6 +269,7 @@ static Value *concatenate(IRBuilder<> &Builder, ArrayRef<Value *> Fragments,
   return Res;
 }
 
+namespace {
 class ScalarizerVisitor : public InstVisitor<ScalarizerVisitor, bool> {
 public:
   ScalarizerVisitor(DominatorTree *DT, const TargetTransformInfo *TTI,