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Re: [tree-ssa] Block merging (updated)

From: Richard Henderson <rth at redhat dot com>
To: law at redhat dot com
Cc: Daniel Jacobowitz <drow at mvista dot com>, gcc-patches at gcc dot gnu dot org
Date: Wed, 14 Jan 2004 23:27:17 -0800
Subject: Re: [tree-ssa] Block merging (updated)
References: <20040113205446.GB16131@nevyn.them.org> <200401150455.i0F4tTmk006047@speedy.slc.redhat.com>

On Wed, Jan 14, 2004 at 09:55:29PM -0700, law@redhat.com wrote:
> IIRC the kernel folks take the address of labels not used in active
> flow control and pass them around for some reason or another.  Apparently
> it's useful to them.  Richard probably remembers more.

Mostly for logging a bug with an address.  

I think that's fallen out of favour in more recent kernels (though not
extinct to be sure) simply because they've realized that lots of in-line
logging bulks up the code something fierce, and once you're out of line
you can use __builtin_return_address to get the same thing.

r~

References:
- Re: [tree-ssa] Block merging (updated)
  - From: Daniel Jacobowitz
- Re: [tree-ssa] Block merging (updated)
  - From: law

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