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I have a suggestion, one that I think I made before:I'd be OK with that approach. Do you have a patch we can try out?
There are two separate cases.
For the not-all-field-specified case, we *have* to do the clearing, but it's relatively uncommon. So if TARGET is /u, make a new temporary, do the store into it in the usual manner, and copy it into the /u TARGET.
In the other cases (mostly_zero), the clearing is an *optimization*. So
suppress it for the /u TARGET.
-- Mark Mitchell CodeSourcery, LLC (916) 791-8304 mark@codesourcery.com
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