[Bug c/101705] Missed optimization opportunity when copying lots of bitfields

[jengelh at inai dot de via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101705

--- Comment #1 from Jan Engelhardt <jengelh at inai dot de> ---
Created attachment 51228
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51228&action=edit
testcase, 1.c