`enum class` is not a constexpr

[devshgraphicsprogramming]

Description Unscoped enums work fine with my integral_constant, scoped don't.

Steps to Reproduce Actual Behavior

Enum Class not constexpr: https://godbolt.org/z/hheGKo9vx

unscoped enum is constexpr: https://godbolt.org/z/7rorK5qoW

Environment

• DXC version: Latest Godbolt trunk
• Host Operating System: Linux I guess?

[damyanp]

While we'd consider accepting PR that addresses this issue, we're not planning on investing in fixing this in DXC. This won't be an issue in clang.

[llvm-beanz]

This is a duplicate of an issue you already filed: https://github.com/microsoft/DirectXShaderCompiler/issues/5554