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[Bug optimization/13772] [tree-ssa] ICE in get_expr_operands
- From: "rth at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 22 Jan 2004 19:45:36 -0000
- Subject: [Bug optimization/13772] [tree-ssa] ICE in get_expr_operands
- References: <20040120162056.13772.reichelt@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From rth at redhat dot com 2004-01-22 19:45 -------
Subject: Re: PR 13772 candidate fix
On Thu, Jan 22, 2004 at 02:07:12PM +0100, Andreas Schwab wrote:
> (mem/s:TI (post_modify:DI (reg/f:DI 36 loc4 [400])
> (plus:DI (reg/f:DI 36 loc4 [400])
> (const_int 8 [0x8]))) [4 opt__R47s+0 S16 A128])
Yep, looking at the patch, I was about to remind Zack that
(1) post-modify can take registers as well as constants, and
(2) you have to check for overflowing the 9-bit post-modify
constant.
Hum, and, actually, that post-modify seems very improbable.
addr += addr? There's sure to be a typo somewhere.
r~
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13772