From: Zdenek Dvorak <rakdver@kam.mff.cuni.cz>
To: Tom de Vries <vries@codesourcery.com>
Cc: gcc-patches@gcc.gnu.org
Subject: Re: [PATCH PR45098, 7/10] Nowrap limits iterations
Date: Thu, 19 May 2011 04:45:00 -0000 [thread overview]
Message-ID: <20110518211157.GA19788@kam.mff.cuni.cz> (raw)
In-Reply-To: <4DD3FD79.2020804@codesourcery.com>
Hi,
> This patch attemps to estimate the number of iterations of the loop based on
> nonwrapping arithmetic in the loop body.
>
> 2011-05-05 Tom de Vries <tom@codesourcery.com>
>
> PR target/45098
> * tree-ssa-loop-ivopts.c (struct ivopts_data): Add fields
> max_iterations_p and max_iterations.
> (is_nonwrap_use, max_loop_iterations, set_max_iterations): New function.
> (may_eliminate_iv): Use max_iterations_p and max_iterations.
> (tree_ssa_iv_optimize_loop): Use set_max_iterations.
what are the cases this handles better than the existing analysis of maximum numbers of iterations
(estimate_numbers_of_iterations)? Would it be possible to add the handling of these cases
to estimate_numbers_of_iterations, rather than doing it just for ivopts?
Zdenek
next prev parent reply other threads:[~2011-05-18 21:12 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-17 7:23 [PATCH, PR45098] Tom de Vries
2011-05-17 7:25 ` [PATCH, PR45098, 1/10] Tom de Vries
2011-05-19 11:17 ` [PATCH PR45098, 1/10] Proc object-size fix Tom de Vries
2011-05-17 8:12 ` [PATCH, PR45098, 2/10] Tom de Vries
2011-05-18 9:39 ` Zdenek Dvorak
2011-05-17 8:30 ` [PATCH, PR45098, 3/10] Tom de Vries
2011-05-18 10:10 ` Zdenek Dvorak
2011-05-18 13:00 ` Tom de Vries
[not found] ` <20110518152457.GA13360@kam.mff.cuni.cz>
2011-05-18 19:30 ` Tom de Vries
2011-05-17 8:32 ` [PATCH, PR45098, 4/10] Tom de Vries
2011-05-18 17:46 ` [PATCH PR45098, 4/10] Iv init cost Tom de Vries
2011-05-18 22:59 ` Zdenek Dvorak
2011-05-25 14:20 ` Richard Sandiford
2011-05-26 12:24 ` Tom de Vries
2011-05-31 15:22 ` Richard Sandiford
2011-05-17 8:37 ` [PATCH, PR45098, 5/10] Tom de Vries
2011-05-18 17:48 ` [PATCH PR45098, 5/10] Bound cost Tom de Vries
2011-05-19 4:45 ` Zdenek Dvorak
2011-05-17 8:42 ` [PATCH, PR45098, 6/10] Tom de Vries
2011-05-18 17:48 ` [PATCH PR45098, 6/10] Bound cost - test cases Tom de Vries
2011-05-17 8:58 ` [PATCH, PR45098, 7/10] Tom de Vries
2011-05-18 17:52 ` [PATCH PR45098, 7/10] Nowrap limits iterations Tom de Vries
2011-05-19 4:45 ` Zdenek Dvorak [this message]
2011-05-20 12:22 ` Tom de Vries
2011-05-21 18:54 ` Zdenek Dvorak
2011-05-21 22:53 ` Tom de Vries
2011-05-28 17:58 ` Tom de Vries
2011-05-30 15:12 ` Zdenek Dvorak
2011-05-31 9:07 ` Tom de Vries
2011-05-31 9:11 ` Zdenek Dvorak
2011-06-11 10:13 ` Tom de Vries
2011-06-12 1:17 ` Zdenek Dvorak
2011-05-23 14:50 ` H.J. Lu
2011-05-17 9:03 ` [PATCH, PR45098, 8/10] Tom de Vries
2011-05-18 18:23 ` [PATCH PR45098, 8/10] Nowrap limits iterations - test cases Tom de Vries
2011-05-18 18:27 ` [PATCH PR45098, 9/10] Cheap shift-add Tom de Vries
2011-05-19 5:33 ` Zdenek Dvorak
2011-05-20 11:32 ` Tom de Vries
2011-05-20 20:09 ` Zdenek Dvorak
2011-05-21 15:05 ` Eric Botcazou
2011-05-22 19:33 ` Tom de Vries
2011-05-22 20:22 ` Richard Guenther
2011-05-22 21:11 ` Eric Botcazou
2011-05-17 10:03 ` [PATCH, PR45098, 9/10] Tom de Vries
2011-05-17 10:30 ` [PATCH, PR45098, 10/10] Tom de Vries
2011-05-18 18:30 ` [PATCH PR45098, 10/10] Cheap shift-add - test case Tom de Vries
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