[clang] [X86][Clang] VectorExprEvaluator::VisitCallExpr / InterpretBuiltin - allow SSE/AVX FP2INT conversion intrinsics to be used in constexpr (PR #214611)

[Chirag Patel via cfe-commits]

ChiragPatel8 wrote:

@RKSimon currently this patch only supports EXACT conversions as mentioned in the Issue #169374 . If you prefer, I can add support for rounding/denormal, nan/inf.

https://github.com/llvm/llvm-project/pull/214611