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Re: [PATCH] Optimize tablejumps for switch statements

To: Roger Sayle <roger at eyesopen dot com>
Subject: Re: [PATCH] Optimize tablejumps for switch statements
From: Richard Henderson <rth at redhat dot com>
Date: Wed, 24 Oct 2001 16:22:38 -0700
Cc: gcc-patches at gcc dot gnu dot org
References: <20011024151210.A20383@redhat.com> <Pine.LNX.4.33.0110241638350.28392-100000@www.eyesopen.com>

On Wed, Oct 24, 2001 at 04:56:37PM -0600, Roger Sayle wrote:
>     /* RANGE may be signed and really large ranges will show up as
>        negative numbers.  */
>     || compare_tree_int (range, 0) < 0
> 
> Hence if "minval=1" and "maxval=HOST_WIDE_INT_MAX+1" then the optimization
> should not be applied...

The comment lies.  It predates compare_tree_int which
handles this correctly.


r~

References:
- Re: [PATCH] Optimize tablejumps for switch statements
  - From: Richard Henderson
- Re: [PATCH] Optimize tablejumps for switch statements
  - From: Roger Sayle

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