[clang] [Clang] VectorExprEvaluator::VisitCallExpr / InterpretBuiltin - allow insertps intrinsic to be used in constexp (PR #165513)

[Simon Pilgrim via cfe-commits]

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@@ -327,8 +327,11 @@ let Features = "ssse3", Attributes = [NoThrow, Const, Constexpr, RequiredVectorW
   }
 }
 
-let Features = "sse4.1", Attributes = [NoThrow, Const, RequiredVectorWidth<128>] in {
+let Features = "sse4.1", Attributes = [NoThrow, Const, Constexpr, RequiredVectorWidth<128>] in {
   def insertps128 : X86Builtin<"_Vector<4, float>(_Vector<4, float>, _Vector<4, float>, _Constant char)">;
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RKSimon wrote:

Move this down to the ptestz128 intrinsics?

https://github.com/llvm/llvm-project/pull/165513