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Message-ID: <7871BF4412B24A3384E88BA9E8D449B1@pauldell>
From: "Paul Edwards" <mutazilah@gmail.com>
To: "Ulrich Weigand" <uweigand@de.ibm.com>
Cc: <gcc@gcc.gnu.org>
References: <201108151431.p7FEVuO8029670@d06av02.portsmouth.uk.ibm.com>
In-Reply-To: <201108151431.p7FEVuO8029670@d06av02.portsmouth.uk.ibm.com>
Subject: Re: i370 port
Date: Mon, 15 Aug 2011 15:26:00 -0000
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> You'll need to mark your new constraint as EXTRA_MEMORY_CONSTRAINT
> so that reload knows what to do when an argument doesn't match.

Thanks! That certainly produced an effect.

Unfortunately it's not quite right, seemingly not loading R9 properly:

LR    9,13
AR    9,13
MVC   0(10,9),0(2)

And it had a knock-on effect too, producing bad code elsewhere:

<          SLR   2,2
<          SLR   3,3
<          ST    2,128(13)
<          ST    3,4+128(13)
<          ST    2,136(13)
<          ST    3,4+136(13)
<          ST    2,144(13)
<          ST    3,4+144(13)
---
>          MVC   128(8,13),=F'0'
>          MVC   136(8,13),=F'0'
>          MVC   144(8,13),=F'0'

But I guess that is another can of worms to investigate.

BFN.  Paul.