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Re: Storing optimization choices in an ELF section
Hi,
Andrew Haley <aph@redhat.com> skribis:
> On 01/06/17 13:45, Ludovic Courtès wrote:
>> A proprietary compiler stores information about optimizations it has
>> made (loop unrolling, vectorization, etc.) in a ‘.debug_opt_report’ ELF
>> section. This information can later be exploited by performance
>> analysis tools, which can help understand performance.
>>
>> Has there been any thought on implementing something similar in GCC?
>
> It's all in the -fverbose-asm output. It would be almost trivial
> to output that into a .debug_opt_report section.
Yes (modulo issues such as finding a compact and stable representation I
suppose), and it would be a useful tool.
Ludo’.