[clang] [Headers][X86] VectorExprEvaluator::VisitCallExpr / InterpretBuiltin - allow PALIGNR byte shift intrinsics to be used in constexpr (PR #162005)

[Ye Tian via cfe-commits]

TianYe717 wrote:

Hi @RKSimon , 
Apologies for missing the issue’s suggestions earlier. I’ve now addressed them and would greatly appreciate it if you could review the changes again. Thanks again for your patience and feedback!

https://github.com/llvm/llvm-project/pull/162005