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[Bug target/20020] x86_64 - 128 bit structs not targeted to TImode
- From: "gary at intrepid dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 17 Feb 2005 21:41:35 -0000
- Subject: [Bug target/20020] x86_64 - 128 bit structs not targeted to TImode
- References: <20050217033541.20020.gary@intrepid.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From gary at intrepid dot com 2005-02-17 21:41 -------
> Also note MAX_FIXED_MODE_SIZE was changed on
> rs6000 for a reason and not for an optimization issue.
Based on my interpretaion of the procedure call ABI, both this problem and a
related Bug #19566 demonstrate a variance from the AMD 64 bit ABI (see "System
V Application Binary Interface AMD64 Architecture Processor Supplement", Draft
Version 0.95, January 14, 2005, section 3.2.3).
If this is a correct interpretation of the ABI, then both bugs are not just
performance related.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20020