[Bug middle-end/51994] [4.6/4.7 Regression] git-1.7.8.3 miscompiled due to negative bitpos from get_inner_reference

ebotcazou at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Wed Feb 1 15:54:00 GMT 2012


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51994

--- Comment #30 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-02-01 15:53:25 UTC ---
> I'm not sure it's the best thing to do (adjusting 'offset' by
> a BITS_PER_UNIT multiple instead of whatever the caller would like the most).
> Only the callers would know how they want to adjust for negative bitpos.

I don't think the callers are prepared for a reference outside the base object,
so there must be a offset.  And I don't see what they would want to do with a
negative bitpos, apart from translating it somehow or other.



More information about the Gcc-bugs mailing list