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[Bug middle-end/51994] [4.6/4.7 Regression] git-1.7.8.3 miscompiled due to negative bitpos from get_inner_reference
- From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 01 Feb 2012 15:53:25 +0000
- Subject: [Bug middle-end/51994] [4.6/4.7 Regression] git-1.7.8.3 miscompiled due to negative bitpos from get_inner_reference
- Auto-submitted: auto-generated
- References: <bug-51994-4@http.gcc.gnu.org/bugzilla/>
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.