[clang] [clang][bytecode][NFC] Enfore internal linkage (PR #213208)

[Timm Baeder via cfe-commits]

https://github.com/tbaederr updated https://github.com/llvm/llvm-project/pull/213208

>From a8b5ec04c95b4f81002431b7ce8c0eb62e54e5c1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timm=20B=C3=A4der?= <tbaeder at redhat.com>
Date: Fri, 31 Jul 2026 07:55:48 +0200
Subject: [PATCH] [clang][bytecode][NFC] Enfore internal linkage

---
 clang/lib/AST/ByteCode/Interp.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/clang/lib/AST/ByteCode/Interp.cpp b/clang/lib/AST/ByteCode/Interp.cpp
index 23bdc5ea28c03..5e76d90daff84 100644
--- a/clang/lib/AST/ByteCode/Interp.cpp
+++ b/clang/lib/AST/ByteCode/Interp.cpp
@@ -2061,6 +2061,7 @@ static bool getDynamicDecl(InterpState &S, CodePtr OpPC, PtrView TypePtr,
   return DynamicDecl != nullptr;
 }
 
+namespace {
 struct DynamicCastResult {
   UnsignedOrNone Offset = std::nullopt;
   bool Ambiguous = false;
@@ -2085,6 +2086,7 @@ struct DynamicCastResult {
     }
   }
 };
+} // namespace
 
 // Walk UP the type hierarchy, starting at the decl of R to find Needle.
 static DynamicCastResult findRecordBase(const ASTContext &Ctx, const Record *R,
@@ -3220,7 +3222,7 @@ bool CastFloatingIntegralAPS(InterpState &S, CodePtr OpPC, uint32_t BitWidth,
 }
 
 // FIXME: Would be nice to generate this instead of hardcoding it here.
-constexpr bool OpReturns(Opcode Op) {
+[[maybe_unused]] static constexpr bool OpReturns(Opcode Op) {
   return Op == OP_RetVoid || Op == OP_RetValue || Op == OP_NoRet ||
          Op == OP_RetSint8 || Op == OP_RetUint8 || Op == OP_RetSint16 ||
          Op == OP_RetUint16 || Op == OP_RetSint32 || Op == OP_RetUint32 ||