[Issue 12642] Avoid some heap allocation cases for fixed-size arrays

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=12642

--- Comment #8 from github-bugzilla at puremagic.com ---
Commits pushed to master at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/f8c228cf20b656db91ef478b20a34d290888647b
Additional issue 12642 fix for vector literal and @nogc

https://github.com/D-Programming-Language/dmd/commit/d060bdb123b93bd69de95c4494bdbbc40260aa8b
Merge pull request #3587 from 9rnsr/fix12642

Additional issue 12642 fix for vector literal and @nogc

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