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[Bug rtl-optimization/61605] Potential optimization: Keep unclobbered argument registers live across function calls
- 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: Sun, 28 Sep 2014 07:21:48 +0000
- Subject: [Bug rtl-optimization/61605] Potential optimization: Keep unclobbered argument registers live across function calls
- Auto-submitted: auto-generated
- References: <bug-61605-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61605
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andi Kleen from comment #1)
> This is in theory implemented in mainline with -fuse-caller-save
> It doesn't seem to work for me though. I also didn't see the option doing
> anything on a larger program.
Most likely because it is not fully implemented for x86 :).