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Re: [Qemu-devel] [PATCH 0/9] tcg/optimize: rework copy propagation
From: |
Laurent Desnogues |
Subject: |
Re: [Qemu-devel] [PATCH 0/9] tcg/optimize: rework copy propagation |
Date: |
Fri, 21 Sep 2012 14:36:04 +0200 |
On Wed, Sep 19, 2012 at 10:00 PM, Aurelien Jarno <address@hidden> wrote:
> This patch series rework the copy propagation in order to generate
> better code. The first two patches are cleanup and bug fixes, the third
> patch is the heart of the series, and the remaining ones are small
> optimizations using the new copy propagation.
>
> I have measured a decrease of the generated code size of about 4%, with
> a gain in speed between 0 and 2% depending on the workload.
>
> For better benefits in ARM emulation, it should be used with the setcond
> patches series I have sent a few days ago.
Using this patch series along with the ARM one, I got a nice gain of
speed in user mode for SPECCPU 2k gcc: without the patches the
integrate.i data set runs in 13.6s, with them the time is reduced to 12.4s
(host CPU is i5 2400 64-bit mode). Nice job!
Laurent
> Aurelien Jarno (9):
> tcg/optimizer: remove TCG_TEMP_ANY
> tcg/optimizer: check types in copy propagation
> tcg/optimizer: rework copy progagation
> tcg/optimize: do copy propagation for all operations
> tcg/optimize: optimize "op r, a, a => mov r, a"
> tcg/optimize: optimize "op r, a, a => movi r, 0"
> tcg/optimize: further optimize brcond/setcond
> tcg/optimize: prefer the "op a, a, b" form for commutative ops
> tcg: remove #ifdef #endif around TCGOpcode tests
>
> tcg/optimize.c | 326
> ++++++++++++++++++++++++++++++++++----------------------
> tcg/tcg.c | 16 +--
> 2 files changed, 200 insertions(+), 142 deletions(-)
>
> --
> 1.7.10.4
>
>
- Re: [Qemu-devel] [PATCH 2/9] tcg/optimizer: check types in copy propagation, (continued)
[Qemu-devel] [PATCH 7/9] tcg/optimize: further optimize brcond/setcond, Aurelien Jarno, 2012/09/19
[Qemu-devel] [PATCH 8/9] tcg/optimize: prefer the "op a, a, b" form for commutative ops, Aurelien Jarno, 2012/09/19
[Qemu-devel] [PATCH 3/9] tcg/optimizer: rework copy progagation, Aurelien Jarno, 2012/09/19
[Qemu-devel] [PATCH 5/9] tcg/optimize: optimize "op r, a, a => mov r, a", Aurelien Jarno, 2012/09/19
Re: [Qemu-devel] [PATCH 0/9] tcg/optimize: rework copy propagation,
Laurent Desnogues <=