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Re: Basic Block Statistics


On 05/16/2017 12:37 PM, Will Hawkins wrote:
> On Tue, May 16, 2017 at 2:33 PM, Jeff Law <law@redhat.com> wrote:
>> On 05/16/2017 12:24 PM, Will Hawkins wrote:
>>> Hello everyone!
>>>
>>> I apologize if this is not the right venue to ask this question and/or
>>> this is a waste of your time.
>>>
>>> I was just wondering if there are statistics that gcc can emit that
>>> includes either a) the average number of instructions per basic block
>>> and/or b) the average size (in bytes) per basic block in a compilation
>>> unit.
>>>
>>> If nothing like this exists, I am more than happy to code something up
>>> if people besides me think that it might be interesting.
>>>
>>> I promise that I googled for information before asking, but I can't
>>> guarantee that I didn't miss anything. Again, I apologize if I just
>>> needed to RTFM better.
>> I don't think we have anything which inherently will give you this
>> information.
>>
>> It'd be a useful thing to have though.  Implementation may be made more
>> difficult by insns that generate > 1 instruction.
>>
>> Jeff
> 
> Thank you, Mr. Law. I think that this is something I'd really like to
> work on. As I start to take a peak into how hard/easy this is to
> implement, I may circle back and ask some additional technical
> questions.
Sure.  On-list is best.
Jeff


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