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Re: generate RTL sequence

From: daniel tian <daniel dot xntian at gmail dot com>
To: Ian Lance Taylor <iant at google dot com>
Cc: gcc at gcc dot gnu dot org, Jeff Law <law at redhat dot com>, peng dot zheng at mavrixtech dot com, jianzhangpeng at gmail dot com
Date: Fri, 11 Dec 2009 11:52:44 +0800
Subject: Re: generate RTL sequence
References: <121fadb80912101733h7028a00aw62bba73e6569ef66@mail.gmail.com> <mcrk4wunq3m.fsf@dhcp-172-17-9-151.mtv.corp.google.com> <121fadb80912101937v165e1bb0n4d994895e175cc6b@mail.gmail.com> <mcr7hsunpb1.fsf@dhcp-172-17-9-151.mtv.corp.google.com>

>> Does there any solution in RTL level?
>> Because I already solve the problem in ASM output level, ?exactly the
>> same solution as you suggest in this email.
>> I may need do some optimization later. So RTL level will be great!
>
> As far as I know there is no way to do this at the RTL level. ?I don't
> know why there would be a way, as it does not strike me as a useful
> feature to have. ?If the instructions must stay together at the
> assembly level, use a single define_insn. ?If you use multiple
> define_insns, then it's OK for the compiler to move them around.
>
> Ian
>

Ok.  Thanks.

References:
- generate RTL sequence
  - From: daniel tian
- Re: generate RTL sequence
  - From: Ian Lance Taylor
- Re: generate RTL sequence
  - From: daniel tian
- Re: generate RTL sequence
  - From: Ian Lance Taylor

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