[clang] [clang][ExprConst] allow single element access of vector object to be constant expression (PR #101126)

[Shafik Yaghmour via cfe-commits]

https://github.com/shafik commented:

Thank you for working to get this PR finished up. I see at least two comments from the previous PR not addressed here. Please, let's try and get those addressed.

@AaronBallman wanted a test to make sure we reject `&V[0]` which I don't see: https://github.com/llvm/llvm-project/pull/72607#discussion_r1595550346


https://github.com/llvm/llvm-project/pull/101126