https://github.com/AaronBallman created 
https://github.com/llvm/llvm-project/pull/182855

Silences an MSVC C4065 diagnostic that was introduced in 
0dd1cb015e8b1439e70c152eb134abb01e1af831

>From 4a1af7890a0a5e0e12edcc55f24dd28b99ca9ad9 Mon Sep 17 00:00:00 2001
From: Aaron Ballman <[email protected]>
Date: Mon, 23 Feb 2026 09:23:30 -0500
Subject: [PATCH] Silence "switch statement contains default but not case
 labels"; NFC

Silences an MSVC C4065 diagnostic
---
 clang/lib/CodeGen/TargetBuiltins/ARM.cpp | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/clang/lib/CodeGen/TargetBuiltins/ARM.cpp 
b/clang/lib/CodeGen/TargetBuiltins/ARM.cpp
index e6801f77232ad..a04f5e32c18ad 100644
--- a/clang/lib/CodeGen/TargetBuiltins/ARM.cpp
+++ b/clang/lib/CodeGen/TargetBuiltins/ARM.cpp
@@ -2732,10 +2732,6 @@ static bool HasExtraNeonArgument(unsigned BuiltinID) {
   case ARM::BI__builtin_arm_vcvtr_d:
     mask = 1;
   }
-  switch (BuiltinID) {
-  default:
-    break;
-  }
 
   if (mask)
     return true;

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