Re: open64 versus gcc

ST <>
6 Dec 2006 08:59:52 -0500

          From comp.compilers

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[8 earlier articles]
Re: open64 versus gcc (A.L.) (2006-12-01)
Re: open64 versus gcc (Jonathan Thornburg -- remove -animal to reply) (2006-12-03)
Re: open64 versus gcc (Diego Novillo) (2006-12-03)
Re: open64 versus gcc (Greg Lindahl) (2006-12-03)
Re: open64 versus gcc (Brooks Moses) (2006-12-03)
Re: open64 versus gcc (Gary Oblock) (2006-12-03)
Re: open64 versus gcc (ST) (2006-12-06)
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From: ST <>
Newsgroups: comp.compilers
Date: 6 Dec 2006 08:59:52 -0500
Organization: I.N.R.I.A Rocquencourt
References: 06-11-09406-11-100 06-11-104 06-11-113 06-11-120 06-11-124 06-12-032
Keywords: GCC, performance
Posted-Date: 06 Dec 2006 08:59:52 EST

> I was worked on a custom VLIW scheduler grafted into gcc 4.x and at
> the RTL level the alias information available wasn't all that great
> in my opinion. I think there is a fundementail lack of communication
> between the tree level and the RTL levels because though the initial
> RTL generated has a way to get at the tree level information the
> subsequent optimizations need to preserve it (which they don't.)

Yes I agree. There are some ongoing work on gcc aiming to improve this


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