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[Bug tree-optimization/81953] Code sinking increases register pressure
- From: "pinskia at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 23 Aug 2017 16:46:35 +0000
- Subject: [Bug tree-optimization/81953] Code sinking increases register pressure
- Auto-submitted: auto-generated
- References: <bug-81953-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81953
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-08-23
Summary|Code sinking results in |Code sinking increases
|increased use of callee |register pressure
|saved registers |
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Part of it is ter. We should have a simple code motion pass (schedule) that
happens right before expand that reduces register pressure. I think there are
other bug reports about TER interaction and register pressure too.