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Re: LOG_LINKS field not set because of gcse1 (or fwprop1) pass
- From: Rask Ingemann Lambertsen <rask at sygehus dot dk>
- To: Paolo Bonzini <paolo dot bonzini at lu dot unisi dot ch>
- Cc: GCC Development <gcc at gcc dot gnu dot org>
- Date: Mon, 14 Aug 2006 18:25:36 +0200
- Subject: Re: LOG_LINKS field not set because of gcse1 (or fwprop1) pass
- References: <20060813201602.GC5988@sygehus.dk> <44E01A35.6030602@lu.unisi.ch>
On Mon, Aug 14, 2006 at 08:37:41AM +0200, Paolo Bonzini wrote:
> But isn't reg 32 dead, because it is only set by insn 98:
>
> (insn 98 96 101 9 (set (reg/v:HI 32 [ size ])
> (reg:HI 43)) 33 {movhi} (insn_list:REG_DEP_TRUE 96 (nil))
> (nil))
>
> after copyprop?
No, because insn 96, which reads reg 32, might be executed the next time
through the loop.
--
Rask Ingemann Lambertsen