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Re: Sharing hard registers
- From: "David S. Miller" <davem at redhat dot com>
- To: law at redhat dot com
- Cc: jh at suse dot cz, apl at alum dot mit dot edu, echristo at redhat dot com, gcc at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
- Date: Fri, 14 Jun 2002 03:48:17 -0700 (PDT)
- Subject: Re: Sharing hard registers
- References: <20020614.032125.112382908.davem@redhat.com><4038.1024051897@porcupine.cygnus.com>
From: law@redhat.com
Date: Fri, 14 Jun 2002 04:51:37 -0600
I pondered doing this briefly, but when I looked at the profiling data it
just didn't seem worth the effort.
...
From the profiling data it doesn't appear to be worth it -- once you're sharing
regno_raw_mode hard regs you've got 99% of the benefit of sharing hard regs.
See my other email for why I also care about the low-profile cases
as well as the really high count ones :-)