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Re: Dataflow question

From: Paolo Bonzini <bonzini at gnu dot org>
To: GCC Development <gcc at gcc dot gnu dot org>, Rask Ingemann Lambertsen <rask at sygehus dot dk>
Date: Tue, 27 Nov 2007 19:33:30 +0100
Subject: Re: Dataflow question
References: <20071127164653.GD17368@sygehus.dk>

Rask Ingemann Lambertsen wrote:

   I have a simple loop over the defs of an INSN, looking for the def of a
specific register X:
Should I just compare register numbers instead?

I think so, or maybe even use reg_overlap_mentioned_p. It depends what you're doing. For 4.4, it may be worth modifying df_find_def and df_find_use so that you can just use those.

Paolo

References:
- Dataflow question
  - From: Rask Ingemann Lambertsen

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