[Bug target/92140] clang vs gcc optimizing with adc/sbb

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92140

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 47062
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47062&action=edit
gcc10-pr92140-wip.patch

Slightly extended untested patch, which handles all the cases in the testcase
at the start of the file.  Originally reported tst3 still unhandled though.