[llvm-branch-commits] [clang] HIP: Use builtin_nan instead of manual expansion (PR #128023)

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b-sumner wrote:

> why do we want to do this if it is broken for non-literal string?

Right.  It doesn't seem likely that it won't be literal, but no documentation I've found requires it to be.

https://github.com/llvm/llvm-project/pull/128023