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[Qemu-devel] [PATCH v2 0/9] Improve TCG optimizer
From: |
Aurelien Jarno |
Subject: |
[Qemu-devel] [PATCH v2 0/9] Improve TCG optimizer |
Date: |
Fri, 7 Sep 2012 15:16:23 +0200 |
This patch series improves the TCG optimizer, based on patterns found
while executing various guest. The brcond ad setcond constant folding
are useful especially useful when they are used to avoid some argument
values (e.g. division by 0), and thus can be optimized when this argument
is a constant.
This bring around 0.5% improvement on openssl like benchmarks.
Modifications between V1 and V2 following feedback I got:
- In the first patch, account for the liveness analysis time and
optimizing pass time separately
- Fixed swith/break in patch 7 to correctly throw an error
- Added patch 9 to make the code more readable
Other patches are unmodified.
Aurelien Jarno (9):
tcg: improve profiler
tcg/optimize: split expression simplification
tcg/optimize: simplify or/xor r, a, 0 cases
tcg/optimize: simplify and r, a, 0 cases
tcg/optimize: simplify shift/rot r, 0, a => movi r, 0 cases
tcg/optimize: swap brcond/setcond arguments when possible
tcg/optimize: add constant folding for setcond
tcg/optimize: add constant folding for brcond
tcg/optimize: fix if/else/break coding style
tcg/optimize.c | 179 +++++++++++++++++++++++++++++++++++++++++++++++++++-----
tcg/tcg.c | 12 +++-
tcg/tcg.h | 1 +
3 files changed, 175 insertions(+), 17 deletions(-)
--
1.7.10.4
- [Qemu-devel] [PATCH v2 0/9] Improve TCG optimizer,
Aurelien Jarno <=
- [Qemu-devel] [PATCH v2 2/9] tcg/optimize: split expression simplification, Aurelien Jarno, 2012/09/07
- [Qemu-devel] [PATCH v2 1/9] tcg: improve profiler, Aurelien Jarno, 2012/09/07
- [Qemu-devel] [PATCH v2 3/9] tcg/optimize: simplify or/xor r, a, 0 cases, Aurelien Jarno, 2012/09/07
- [Qemu-devel] [PATCH v2 4/9] tcg/optimize: simplify and r, a, 0 cases, Aurelien Jarno, 2012/09/07
- [Qemu-devel] [PATCH v2 9/9] tcg/optimize: fix if/else/break coding style, Aurelien Jarno, 2012/09/07
- [Qemu-devel] [PATCH v2 8/9] tcg/optimize: add constant folding for brcond, Aurelien Jarno, 2012/09/07
- [Qemu-devel] [PATCH v2 5/9] tcg/optimize: simplify shift/rot r, 0, a => movi r, 0 cases, Aurelien Jarno, 2012/09/07
- [Qemu-devel] [PATCH v2 7/9] tcg/optimize: add constant folding for setcond, Aurelien Jarno, 2012/09/07
- [Qemu-devel] [PATCH v2 6/9] tcg/optimize: swap brcond/setcond arguments when possible, Aurelien Jarno, 2012/09/07
- Re: [Qemu-devel] [PATCH v2 0/9] Improve TCG optimizer, Blue Swirl, 2012/09/08