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Re: Combine deletes non noop insns
- From: Jeff Law <law at porcupine dot slc dot redhat dot com>
- To: Richard Henderson <rth at redhat dot com>
- Cc: John David Anglin <dave at hiauly1 dot hia dot nrc dot ca>, gcc at gcc dot gnu dot org
- Date: Wed, 11 Sep 2002 10:46:08 -0600
- Subject: Re: Combine deletes non noop insns
- Reply-to: law at redhat dot com
In message <20020911000346.GC19055@redhat.com>, Richard Henderson writes:
>On Tue, Sep 10, 2002 at 01:18:17PM -0600, Jeff Law wrote:
>> >This seems odd to me. Inserting data into the ignored
>> >portion of a paradoxical subreg?
>> Regardless, we shouldn't have zapped the following store (insn 43),
>> at least that's the way it looks from the information John posted.
>
>Yes, we could, if combine proves that reg 125 is unchanged
>from when it was loaded.
Good point.
jeff