[clang] [clang] Assert the enum FPOpts and LangOpts fit into the storage (PR #126166)

[Florian Mayer via cfe-commits]

fmayer wrote:

> Not sure I understand your question? Which assertion? `clang.exe t.c` is triggering an assertion?

I don't understand why you say

> The value `CX_None` is the defaut value given to the `Range` when no `fcomplex-arithmetic` is used on the command lin

but imply it does not need to be stored in the bitfield. If you patch this CL, and change the size for `ComplexRange` back, you will see it that it fails the assertion I added if you run the clang test suite.

https://github.com/llvm/llvm-project/pull/126166