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| Related articles |
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| [7 earlier articles] |
| Register allocation avizit@gmail.com (2004-07-15) |
| Re: Register allocation gopi@sankhya.com (2004-07-28) |
| Re: Register allocation rajaram@acmet.com (Rajaram) (2004-08-04) |
| Re: Register allocation kamalp@acm.org (2004-08-05) |
| Re: Register allocation kym@sdf.lonestar.org (russell kym horsell) (2004-08-09) |
| Re: Register allocation kamalp@acm.org (2004-08-09) |
| Re: Register allocation gopi@sankhya.com (2004-08-10) |
| Re: Register allocation anton@mips.complang.tuwien.ac.at (2004-08-10) |
| Re: Register allocation anton@mips.complang.tuwien.ac.at (2004-08-10) |
| Re: Register allocation kym@kymhorsell.com (2004-08-11) |
| Re: Register allocation kamalp@acm.org (2004-08-13) |
| Register allocation thibault.langlois@di.fc.ul.pt (thibault.langlois@di.fc.ul.pt) (2005-05-13) |
| Re: Register allocation rgd00@doc.ic.ac.uk (Rob Dimond) (2005-05-16) |
| [15 later articles] |
| From: | gopi@sankhya.com (Gopi Bulusu) |
| Newsgroups: | comp.compilers |
| Date: | 10 Aug 2004 17:28:08 -0400 |
| Organization: | http://groups.google.com |
| References: | 04-07-044 04-07-074 04-08-022 |
| Keywords: | registers |
| Posted-Date: | 10 Aug 2004 17:28:08 EDT |
kamalp@acm.org (Kamal R. Prasad) wrote
> No doubt the speed with which a register can be accessed is much
> higher than a first-level cache access, but the performance difference
> between a good and bad allocation strategy may not amount to a lot
> [and that is a guess].
In reality, It can be very significant on most processors. Reminds me
of one of those (Amdahl's ?) laws which states that it is good to have
either 0, 1 or infinite number of a particular resource (like a
register). The difference between good and bad register allocation can
have significant impact on performance. No wonder, register allocation
tends to be the "buggiest and most difficult to maintain" part of
almost any code generator/optimizer !
Regards,
gopi
---
Gopi Kumar Bulusu
Sankhya Technologies Private Limited
http://www.sankhya.com
Tel: +91 891 554 2666
Fax: +91 891 554 2665
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