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Re: Question about SUBREG handling in get_last_value

From: Richard Henderson <rth at redhat dot com>
To: John David Anglin <dave at hiauly1 dot hia dot nrc dot ca>
Cc: gcc at gcc dot gnu dot org
Date: Tue, 27 Nov 2001 16:21:37 -0800
Subject: Re: Question about SUBREG handling in get_last_value
References: <20011127135551.D30114@redhat.com> <200111280010.fAS0Aa36021122@hiauly1.hia.nrc.ca>

On Tue, Nov 27, 2001 at 07:10:35PM -0500, John David Anglin wrote:
> 	* combine.c (gen_lowpart_for_combine): Don't call simplify_gen_subreg
> 	with a VOIDmode inner mode.

This, however, doesn't special-case CONST_INT.

> However, how to decide what is useful and what isn't?

Well, I can tell you that a CALL isn't.


r~

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References:
- Re: Question about SUBREG handling in get_last_value
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- Re: Question about SUBREG handling in get_last_value
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