Nate Chandler a67c22d905 [CopyPropagation] Only delete if canonicalized. ...

Owned lifetime canonicalization bails on move-only values.

Previously, though, every value that was fed to canonicalization was
then attempted to be deleted.  For dead move-only values, the result
could be to shorten move-only lifetimes, which is illegal per language
rules.

Here, this is fixed by not attempting to delete owned values for which
canonicalization bailed.

rdar://114323803

2023-08-23 11:42:57 -07:00

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