Richard Earnshaw - Re: [dataflow]: PATCH COMMITTED to make arm-elf work. (original) (raw)

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• From: Richard Earnshaw
• To: Kenneth Zadeck
• Cc: Paolo Bonzini , gcc-patches , Seongbae Park , Daniel Berlin , Steven Bosscher , "Edelsohn, David"
• Date: Fri, 02 Feb 2007 17:09:04 +0000
• Subject: Re: [dataflow]: PATCH COMMITTED to make arm-elf work.
• References: <45C34A75.6080108@naturalbridge.com> <45C3514F.4080309@lu.unisi.ch> <45C36CB7.4020304@naturalbridge.com> <1170435396.32611.45.camel@pc960.cambridge.arm.com> <45C36EFD.3080906@naturalbridge.com>

On Fri, 2007-02-02 at 12:03 -0500, Kenneth Zadeck wrote:

Richard Earnshaw wrote:

I think the docs say that any asm with no inputs or outputs is treated as volatile; however, I think this is handled in the front-ends (and they thus become volatile before the middle-end sees it).

R.

If that is true, then all is well. What does not work is that if the back end(s) generate a asm_input and just expect that the volatile fairy is going to magically confer volatile on them as was done in the three places that we changed to gen_blockage.

Agreed. That would be a straight bug in the backend.

R.

• Follow-Ups:
  • Re: [dataflow]: PATCH COMMITTED to make arm-elf work.
    * From: Paolo Bonzini
• References:
  • [dataflow]: PATCH COMMITTED to make arm-elf work.
    * From: Kenneth Zadeck
  • Re: [dataflow]: PATCH COMMITTED to make arm-elf work.
    * From: Paolo Bonzini
  • Re: [dataflow]: PATCH COMMITTED to make arm-elf work.
    * From: Kenneth Zadeck
  • Re: [dataflow]: PATCH COMMITTED to make arm-elf work.
    * From: Richard Earnshaw
  • Re: [dataflow]: PATCH COMMITTED to make arm-elf work.
    * From: Kenneth Zadeck