From: Per Bothner <per@bothner.com>
To: Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
Cc: gcc@gcc.gnu.org
Subject: Re: ICE in change_address at emit_rtl.c
Date: Sun, 25 Nov 2001 14:50:00 -0000 [thread overview]
Message-ID: <3C01758B.1090804@bothner.com> (raw)
Message-ID: <20011125145000.MTB0tpcclcO-DHW4VKgWysf1m9TY9GfPq6kGWmcVoY0@z> (raw)
In-Reply-To: <10111252231.AA28690@vlsi1.ultra.nyu.edu>
Richard Kenner wrote:
> I'm not sure what the problem is. My proposal is to use some kind of
> LET_EXPR, which takes a declaration and two expressions. It seems
> plausible to me that any place that creates a SAVE_EXPR could use a
> LET_EXPR instead.
>
>So how are you changing things? You're replacing SAVE_EXPR with LET_EXPR
>with similar semantics.
>
The big difference is that the temporary used by LET_EXPR (actually LET_EXPR
can be used to encode user-level declarations too) has a well-defined scope.
It is clear when the temporary register needs to be allocated (on
entrance to the
BODY expression) to be allocated, and it is clear when it can be freed
(on exit
from the BODY expression). Neither are true for SAVE_EXPR, which is much
less well defined.
--Per
next prev parent reply other threads:[~2001-11-25 14:50 UTC|newest]
Thread overview: 112+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-15 17:25 Richard Kenner
2001-11-15 17:39 ` Per Bothner [this message]
2001-11-25 14:50 ` Per Bothner
2001-11-25 14:37 ` Richard Kenner
-- strict thread matches above, loose matches on Subject: below --
2001-11-17 17:09 mike stump
2001-11-17 20:34 ` Per Bothner
2001-11-26 14:58 ` Per Bothner
2001-11-26 14:51 ` mike stump
2001-11-17 11:46 Richard Kenner
2001-11-26 13:36 ` Richard Kenner
2001-11-17 11:23 mike stump
2001-11-26 13:29 ` mike stump
2001-11-17 11:19 mike stump
2001-11-26 12:54 ` mike stump
2001-11-16 9:26 Richard Kenner
2001-11-26 3:15 ` Richard Kenner
2001-11-15 23:55 Richard Kenner
2001-11-25 17:22 ` Richard Kenner
2001-11-15 20:12 Richard Kenner
2001-11-15 20:19 ` Per Bothner
2001-11-25 16:48 ` Per Bothner
2001-11-25 16:24 ` Richard Kenner
2001-11-15 17:44 Richard Kenner
2001-11-15 19:52 ` Per Bothner
2001-11-25 16:13 ` Per Bothner
2001-11-25 15:01 ` Richard Kenner
2001-11-15 16:24 Richard Kenner
2001-11-15 17:08 ` Per Bothner
2001-11-25 14:33 ` Per Bothner
2001-11-25 13:44 ` Richard Kenner
2001-11-15 14:19 Richard Kenner
2001-11-25 6:42 ` Richard Kenner
2001-11-15 13:20 Richard Kenner
2001-11-15 13:20 ` Neil Booth
2001-11-25 6:34 ` Neil Booth
2001-11-16 8:52 ` Richard Henderson
2001-11-25 23:22 ` Richard Henderson
2001-11-25 6:29 ` Richard Kenner
2001-11-15 12:28 Richard Kenner
2001-11-15 12:44 ` Neil Booth
2001-11-25 5:33 ` Neil Booth
2001-11-25 5:25 ` Richard Kenner
2001-11-15 11:05 Richard Kenner
2001-11-15 12:07 ` Neil Booth
2001-11-25 5:23 ` Neil Booth
2001-11-15 14:55 ` Per Bothner
2001-11-25 10:27 ` Per Bothner
2001-11-25 5:13 ` Richard Kenner
2001-11-15 10:14 Richard Kenner
2001-11-15 10:36 ` Neil Booth
2001-11-25 5:06 ` Neil Booth
2001-11-25 4:23 ` Richard Kenner
2001-11-15 8:15 mike stump
2001-11-15 8:43 ` Zack Weinberg
2001-11-24 23:06 ` Zack Weinberg
2001-11-15 8:02 mike stump
2001-11-15 9:51 ` Neil Booth
2001-11-25 4:02 ` Neil Booth
2001-11-14 12:01 mike stump
2001-11-14 14:57 ` Neil Booth
2001-11-14 16:35 ` Gabriel Dos Reis
2001-11-15 9:00 ` Mark Mitchell
2001-11-25 0:41 ` Mark Mitchell
2001-11-13 16:47 dewar
2001-11-13 6:18 Craig Rodrigues
2001-11-13 8:25 ` Gerald Pfeifer
2001-11-13 8:39 ` Craig Rodrigues
2001-11-13 8:40 ` Gerald Pfeifer
2001-11-13 14:52 ` Gerald Pfeifer
2001-11-13 16:41 ` Zack Weinberg
2001-11-13 16:55 ` Neil Booth
2001-11-13 18:07 ` Gabriel Dos Reis
2001-11-13 18:09 ` Neil Booth
2001-11-14 9:46 ` Zack Weinberg
2001-11-14 10:02 ` Neil Booth
2001-11-14 10:06 ` Joseph S. Myers
2001-11-14 10:10 ` Neil Booth
2001-11-14 10:19 ` Joseph S. Myers
2001-11-14 14:16 ` Gabriel Dos Reis
2001-11-14 17:34 ` Michal Moskal
2001-11-14 13:55 ` Gabriel Dos Reis
2001-11-14 15:00 ` Neil Booth
2001-11-14 16:50 ` Gabriel Dos Reis
2001-11-14 12:43 ` Phil Edwards
2001-11-15 0:55 ` Mark Mitchell
2001-11-15 1:22 ` Gabriel Dos Reis
2001-11-15 1:44 ` Neil Booth
2001-11-15 4:55 ` Zack Weinberg
2001-11-15 5:19 ` Joseph S. Myers
2001-11-15 6:58 ` Zack Weinberg
2001-11-15 9:07 ` Mark Mitchell
2001-11-17 9:40 ` Zack Weinberg
2001-11-17 9:56 ` Mark Mitchell
2001-11-18 4:44 ` Zack Weinberg
2001-11-26 16:45 ` Zack Weinberg
2001-11-26 11:55 ` Mark Mitchell
2001-11-26 11:46 ` Zack Weinberg
2001-11-25 0:42 ` Mark Mitchell
2001-11-15 9:23 ` Neil Booth
2001-11-17 10:37 ` Zack Weinberg
2001-11-17 10:54 ` Neil Booth
2001-11-26 12:25 ` Neil Booth
2001-11-26 12:07 ` Zack Weinberg
2001-11-25 3:50 ` Neil Booth
2001-11-15 5:14 ` Mark Mitchell
2001-11-16 6:27 ` Fergus Henderson
2001-11-16 8:32 ` Daniel Berlin
2001-11-25 22:49 ` Daniel Berlin
2001-11-25 22:06 ` Fergus Henderson
2001-11-15 3:02 ` Zack Weinberg
2001-11-16 4:04 ` Fergus Henderson
2001-11-25 21:58 ` Fergus Henderson
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