[clang] [analyzer] Handle [[assume(cond)]] as __builtin_assume(cond) (PR #116462)

[Vitaly Buka via cfe-commits]

vitalybuka wrote:

> I made the followup for this one in #120572

Please severt and reland with followup. Followup is good way to go for trivial cases which can be landed with quick or no review

https://github.com/llvm/llvm-project/pull/116462