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[Bug libstdc++/78713] [missed optimization] gcc doesn't use clobbers to optimize constructors
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 09 Dec 2016 09:21:43 +0000
- Subject: [Bug libstdc++/78713] [missed optimization] gcc doesn't use clobbers to optimize constructors
- Auto-submitted: auto-generated
- References: <bug-78713-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78713
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-12-09
Component|tree-optimization |libstdc++
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Depends on the size of the optional thing of course. A libstdc++ issue, the
middle-end can not know it is allowed to clobber the destination here.