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Re: Some benchmark comparison of gcc4.5 and dragonegg (was dragonegg in FSF gcc?)
On Apr 21, 2010, at 11:11 AM, Vladimir Makarov wrote:
>>
>> This is definitely interesting, but you're also comparing apples and oranges here (for both compile time and performance). Can you get numbers showing GCC -O3 and dragonegg with LTO to get a better comparison?
>>
>>
> Dragonegg does not work with -flto. It generates assembler code on which gas complaints (a lot of non-assembler code like target data-layout which are not in comments).
Ok, I didn't know that didn't get wired up. I'm not familiar with dragonegg, it might require gold with the llvm lto gold plugin or something.
> So I'll do gcc -O3 without -flto. I don't think it will change average SPECINT2000 rate significantly (although it can change separte benchmark significantly) but it will make gcc compiler much faster (may be 2 times because I did not use -fwhole-program). I'll post the results in an hour.
Sounds good, thanks! I suspect the gcc build times will improve.
-Chris