RFR: 8318127: align_up has potential overflow

[Andrew Haley]

On Sat, 21 Sep 2024 00:20:23 GMT, Dean Long <dlong at openjdk.org> wrote:

> Maybe we need two versions of this function, one that allows wrap-around and the other that doesn't. I'm guessing that for most callers, wrap-around would be unexpected and cause bugs, so let's have them ask for it explicitly.

Sounds good to me, but we'd have to be careful about existing usages. I'd just make it so that overflow was signalled for signed types, but perhaps explicit checked and unchecked function names are clearer to the reader,

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PR Comment: https://git.openjdk.org/jdk/pull/20808#issuecomment-2366119016