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Date: Fri, 26 Mar 2021 17:09:35 -0500
From: Segher Boessenkool <segher@kernel.crashing.org>
To: Stefan Franke <stefan@franke.ms>
Cc: gcc-help@gcc.gnu.org
Subject: Re: setmemsi, movmemsi and post_inc
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References: <00fb01d72182$266be7f0$7343b7d0$@franke.ms>
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Hi!

On Thu, Mar 25, 2021 at 03:21:29PM +0100, Stefan Franke wrote:
> (insn 8 7 9 2 (set (reg:SI 41)
>         (reg/f:SI 40)) 
>      (expr_list:REG_INC (reg:SI 41)
>         (nil)))

REG_INC notes are only valid on insns containing a post_inc expression.
This usually is inside a mem, but it doesn't have to be.  So this would
be

  (set (reg:SI 41)
       (post_inc:SI (reg:SI 40)))


Segher