On Thu, Jun 1, 2017 at 2:45 PM, Ludovic Courtès <ludo@xxxxxxx> 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? Yes: https://fedoraproject.org/wiki/Toolchain/Watermark Nick Clifton has been working on the binutils side of the implementation. Thanks, Florian