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[Bug rtl-optimization/70478] [LRA] S/390: Performance regression - superfluous stack frame
- From: "krebbel at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 01 Apr 2016 07:02:28 +0000
- Subject: [Bug rtl-optimization/70478] [LRA] S/390: Performance regression - superfluous stack frame
- Auto-submitted: auto-generated
- References: <bug-70478-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70478
--- Comment #3 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
(In reply to Vladimir Makarov from comment #2)
Thanks for having a look. I'll experiment a bit with adding a '?' constraint
modifier to see what impact it has on benchmarks. In fact it would match the
reality a bit better anyway since the mem-mem instructions have some
restrictions others don't have.