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Re: changing "configure" to default to "gcc -g -O2 -fwrapv ..."

From: Gerald Pfeifer
Subject: Re: changing "configure" to default to "gcc -g -O2 -fwrapv ..."
Date: Tue, 2 Jan 2007 09:06:51 +0100 (CET)

On Tue, 2 Jan 2007, Gabriel Dos Reis wrote:
>|>   for (i = 1; i < m; ++i)
>|>     {
>|>       if (i > 0)
>|>     bar ();
>|>     }
>| Of course, this is an example where either the programmer is doing 
>| something very silly or else is expecting overflow and depending on 
>| wrap semantics, so it seems to me marginal to remove that "if".  My 
>| suggestion would be to issue a warning saying that the test will never 
>| be false, but leaving it in.
> That make sense to me.

I'm worried about our ability to optimize deeply inlined code and things 
like template-heavy C++ code if do skip optimizations like this.


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