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Re: [PATCH GCC][5/5]Enable tree loop distribution at -O3 and above optimization levels.


On 06/02/2017 05:52 AM, Bin Cheng wrote:
> Hi,
> This patch enables -ftree-loop-distribution by default at -O3 and above optimization levels.
> Bootstrap and test at O2/O3 on x86_64 and AArch64.  is it OK?
> 
> Note I don't have strong opinion here and am fine with either it's accepted or rejected.
> 
> Thanks,
> bin
> 2017-05-31  Bin Cheng  <bin.cheng@arm.com>
> 
> 	* opts.c (default_options_table): Enable OPT_ftree_loop_distribution
> 	for -O3 and above levels.
I think the question is how does this generally impact the performance
of the generated code and to a lesser degree compile-time.

Do you have any performance data?

jeff


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