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Re: Re: Re: Re: Re: LOOP_HEADER tree code?

On 10/25/06, Steven Bosscher <stevenb.gcc@gmail.com> wrote:

You could use TREE_USED,  but your suggestion implies that dead code
should be retained in the program,

May be I misunderstood, but it is not dead code. Here is what Zdenek said,

"
...
To keep the information valid, we need

>   to prevent optimizations from destroying it (e.g., if the number
>   is n_1 = n_2 - 1, and this is the last use of n_1, we do not want
>   DCE to remove it);

..."

-
Devang

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