Re: open64 versus gcc

"A.L." <alewando@fala2005.com>
1 Dec 2006 09:49:03 -0500

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open64 versus gcc drizzle76@gmail.com (dz) (2006-11-22)
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From: "A.L." <alewando@fala2005.com>
Newsgroups: comp.compilers
Date: 1 Dec 2006 09:49:03 -0500
Organization: Posted via Supernews, http://www.supernews.com
References: 06-11-09406-11-100 06-11-104 06-11-113 06-11-120 06-11-124
Keywords: GCC, comment
Posted-Date: 01 Dec 2006 09:49:03 EST

On 29 Nov 2006 11:07:43 -0500, Diego Novillo <dnovillo@redhat.com>
wrote:


>dz wrote on 11/29/06 00:52:
>> The criteria I am looking for is stability and the strength of some
>> basic analysis in the compiler such as alias analysis. Can anyone
>> comment on that ?
>
>For alias analysis, GCC uses a fairly sophisticated constraint-based
>points-to analysis and complements it with type-based disambiguation.
>You can read about it in the various GCC Summit proceedings over the
>last 2-3 years. You can find them in http://gcc.gnu.org/wiki
>
>I'm not sure what exactly you mean by "some basic analysis", but you
>will find GCC a fairly featureful compiler.


One of the feature out of the list of "rich features" is that the
results of numerical computations (such as inverting large matrix or
solving large set of linear equations) strongly depends on activated
options, especially optimization level.


If you are a hobbyist, game programmer or GUI programmer, pretty
likely gcc is good enough. If you do mission critical application,
intensive number crunching or both, stay away from gcc.


A.L.
[GCC is fine for systems programming. I've never done serious
numerical work in it, so you may well be right about that. -John]

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