From: Alan Modra <amodra@gmail.com>
To: gcc-patches@gcc.gnu.org, Vladimir Makarov <vmakarov@redhat.com>,
rdsandiford@googlemail.com
Subject: Re: [PATCH] PR79584, lra ICE in base_to_reg
Date: Thu, 23 Feb 2017 01:49:00 -0000 [thread overview]
Message-ID: <20170223014659.GM14945@bubble.grove.modra.org> (raw)
In-Reply-To: <20170223011109.GL14945@bubble.grove.modra.org>
On Thu, Feb 23, 2017 at 11:41:09AM +1030, Alan Modra wrote:
> lo_sum is indeed not valid for mem:SD. simplify_operand_subreg is
> where the subreg disappears.
Richard, doesn't the following say that lra is expecting to reload
exactly the lo_sum address you seem to think it should not handle in
process_address?
/* We still can reload address and if the address is
valid, we can remove subreg without reloading its
inner memory. */
&& valid_address_p (GET_MODE (subst),
regno_reg_rtx
[ira_class_hard_regs
[base_reg_class (GET_MODE (subst),
MEM_ADDR_SPACE (subst),
ADDRESS, SCRATCH)][0]],
MEM_ADDR_SPACE (subst))))
--
Alan Modra
Australia Development Lab, IBM
next prev parent reply other threads:[~2017-02-23 1:47 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-22 21:22 Alan Modra
2017-02-22 23:14 ` Richard Sandiford
2017-02-23 1:21 ` Alan Modra
2017-02-23 1:49 ` Alan Modra [this message]
2017-02-24 0:35 ` Richard Sandiford
2017-02-24 5:20 ` Alan Modra
2017-02-25 7:42 ` Vladimir Makarov
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