[Bug c++/81818] aarch64 uses 2-3x memory and 2x time of arm at -Os, -O2, -O3 (memory-hog)

[andrewm.roberts at sky dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81818

--- Comment #1 from Andrew Roberts <andrewm.roberts at sky dot com> ---
Created attachment 41974
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41974&action=edit
Full test report for Raspberry Pi ARM

Test results for -O0, -Os, -O1, -O2, -O3 for gcc 5.4.0, 6.4.0, 7.2.0, 8.0.0
on Raspberry Pi3 running 32 bit kernel (arm).