From: Tom de Vries <vries@codesourcery.com>
To: Zdenek Dvorak <rakdver@kam.mff.cuni.cz>
Cc: gcc-patches@gcc.gnu.org
Subject: [PATCH, PR45098]
Date: Tue, 17 May 2011 07:23:00 -0000 [thread overview]
Message-ID: <4DD21F6E.4050308@codesourcery.com> (raw)
Hi Zdenek,
I have a patch set for for PR45098.
01_object-size-target.patch
02_pr45098-rtx-cost-set.patch
03_pr45098-computation-cost.patch
04_pr45098-iv-init-cost.patch
05_pr45098-bound-cost.patch
06_pr45098-bound-cost.test.patch
07_pr45098-nowrap-limits-iterations.patch
08_pr45098-nowrap-limits-iterations.test.patch
09_pr45098-shift-add-cost.patch
10_pr45098-shift-add-cost.test.patch
I will sent out the patches individually.
The patch set has been bootstrapped and reg-tested on x86_64, and
reg-tested on ARM.
The effect of the patch set on examples is the removal of 1 iterator,
demonstrated below for '-Os -mthumb -march=armv7-a' on example tr4.
tr4.c:
...
extern void foo2 (short*);
void tr4 (short array[], int n)
{
int i;
if (n > 0)
for (i = 0; i < n; i++)
foo2 (&array[i]);
}
...
tr4.s diff (left without, right with patch):
...
push {r4, r5, r6, lr} | cmp r1, #0
subs r6, r1, #0 | push {r3, r4, r5, lr}
ble .L1 ble .L1
mov r5, r0 | mov r4, r0
movs r4, #0 | add r5, r0, r1, lsl #1
.L3: .L3:
mov r0, r5 | mov r0, r4
adds r4, r4, #1 | adds r4, r4, #2
bl foo2 bl foo2
adds r5, r5, #2 | cmp r4, r5
cmp r4, r6 <
bne .L3 bne .L3
.L1: .L1:
pop {r4, r5, r6, pc} | pop {r3, r4, r5, pc}
...
The effect of the patch set on the test cases in terms of size is listed
in the following 2 tables.
---------------------------
-Os -thumb -mmarch=armv7-a
---------------------------
without with delta
---------------------------
tr1 32 30 -2
tr2 36 36 0
tr3 32 30 -2
tr4 26 26 0
tr5 20 20 0
---------------------------
---------------------------
-Os -mmarch=armv7-a
---------------------------
without with delta
---------------------------
tr1 60 52 -8
tr2 64 60 -4
tr3 60 52 -8
tr4 48 44 -4
tr5 36 32 -4
---------------------------
The size impact on several benchmarks is shown in the following table
(%, lower is better).
none pic
thumb1 thumb2 thumb1 thumb2
spec2000 99.9 99.9 99.9 99.9
eembc 99.9 100.0 99.9 100.1
dhrystone 100.0 100.0 100.0 100.0
coremark 99.3 99.9 99.3 100.0
Thanks,
- Tom
next reply other threads:[~2011-05-17 7:11 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-17 7:23 Tom de Vries [this message]
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
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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