Re: [Qemu-devel] [PATCH 0/8] Improve TCG optimizer

[Richard Henderson]

On 09/06/2012 08:00 AM, Aurelien Jarno wrote:
> 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.
> 
> Aurelien Jarno (8):
>   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

Patches 1-6,8:
Reviewed-by: Richard Henderson <address@hidden>

Patch 7 contains a trivial error.  With that fixed it could
also bear my Reviewed-by mark.


r~