From: Bernd Schmidt <bschmidt@redhat.com>
To: Uros Bizjak <ubizjak@gmail.com>,
"gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH, rtl-optimization]: Fix PR77452, ICE: in plus_constant, at explow.c
Date: Mon, 05 Sep 2016 10:34:00 -0000 [thread overview]
Message-ID: <0cbecf48-b40b-844e-63b6-1f6d7ea2fd05@redhat.com> (raw)
In-Reply-To: <CAFULd4ZJ4BKDUSee=PjQc892pDg1uxR+XsUbG4Lw38xi_oBd5Q@mail.gmail.com>
On 09/04/2016 02:12 PM, Uros Bizjak wrote:
> As shown in the PR [1], combine is able to simplify lowpart
> CONST_VECTOR constant pool reference to its inner-mode reference.
> However, plus_constant was not able to extract the constant from
> narrowed access.
>
> Attached patch teaches plus_constant how to handle this situation.
Ok. It looks like accesses to non-lowpart subregs would be handled by
not optimizing them as well rather than crashing.
Bernd
next prev parent reply other threads:[~2016-09-05 10:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-04 14:08 Uros Bizjak
2016-09-05 10:34 ` Bernd Schmidt [this message]
2016-09-05 11:23 ` Richard Biener
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