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Re: bug fix in reload1.c

To: Weiwen Liu <liu at hepvms dot physics dot yale dot edu>
Subject: Re: bug fix in reload1.c
From: Richard Henderson <rth at cygnus dot com>
Date: Tue, 9 Dec 1997 10:41:54 -0800
Cc: Richard Henderson <rth at cygnus dot com>, egcs-bugs at cygnus dot com
References: <19971209010015.03281@dot.cygnus.com> <Pine.OSF.3.96.971209104217.17585B-100000@ylws39.physics.yale.edu>
Reply-To: egcs-bugs at cygnus dot com

On Tue, Dec 09, 1997 at 10:48:41AM -0500, Weiwen Liu wrote:
> Sorry, there is a typo here.  It should have been
>          (minus:DI (subreg:DI (reg:SI 2) 0)

In which case it is wrong because we've not sign-extended properly.

> >   (set (reg:SI T)
> >        (minus:SI (reg:SI 2)
> >          (subreg:SI (reg:HI 612) 0)))
> >   (set (mem:DI (plus:DI (reg:DI 30)
> > 		  (const_int 104)))
> >        (subreg:DI (reg:SI T)))
> > 
> 
> There might be a problem here, because, I believe, recog_memoized in
> reload1 will not be able to analyze this insn.

I know.  I'm beginning to think that my original solution, widening
the store, was done at the wrong place.


r~

References:
- Re: bug fix in reload1.c
  - From: Richard Henderson
- Re: bug fix in reload1.c
  - From: Weiwen Liu

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