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[Bug middle-end/28831] [4.6/4.7/4.8 Regression] Aggregate copy not elided when using a return value as a pass-by-value parameter
- From: "chip at pobox dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 14 Aug 2012 22:50:01 +0000
- Subject: [Bug middle-end/28831] [4.6/4.7/4.8 Regression] Aggregate copy not elided when using a return value as a pass-by-value parameter
- Auto-submitted: auto-generated
- References: <bug-28831-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28831
--- Comment #17 from Chip Salzenberg <chip at pobox dot com> 2012-08-14 22:50:01 UTC ---
The patch posted in Bug 20020 prevents missed optimization for 128-bit
structures on x86_64. So this bug does seem to be all about the BLKmode.